CN100450238C - Mobile station, mobile communication system and network selecting method - Google Patents

Abstract

To select an optimum cell for communication as a reselection target by a mobile station. In mobile communication system 100 according to the present invention, mobile station 1 is camped on cell C10 established by base station B10. In the cell C10, there exist indoor cells C11-C13 and outdoor cells C21, C22 as neighboring cells. Mobile station 1 measures received levels of cells C10-C13, C21, C22 and determines cell types of the respective cells, i.e., whether each cell is an indoor cell or not, based on broadcast information M1. Mobile station 1 selects a cell as a reselection target on the basis of the received levels and cell types.

Description

Mobile radio station, mobile communication system and network selecting method

Technical field

The present invention relates to mobile radio station, mobile communication system and network selecting method.

Background technology

Existing mobile radio station when selecting the transfer destination zone network, detect mobile radio station from present communication the base station or mobile radio station from the incoming level of the base station of the network in communication range with from the incoming level of the base station of adjacent networks.Mobile radio station is each incoming level relatively, and according to this comparative result, selects from the network of the incoming level maximum of the base station network (for example with reference to patent documentation 1, patent documentation 2) as transfer destination ground.

Below, with reference to the existing network selecting method of Fig. 1 simple declaration.As Fig. 1 was represented, mobile radio station 10 was in the communication range of the network C 0 that is formed by base station B0.Network as adjacent with network C 0 exists network C 1, C2, C3.Mobile radio station 10 is known to have adjacent networks C1, C2, C3 by from base station B0 reception notification information MO.Announcement information MO by the common notification channel of each mobile radio station and to 10 of mobile radio stations not Fen Pei the control channel receive and send.

Moving office 10 detects from the incoming level L0 of base station B0 and from forming adjacent networks C1, each base station B1, B2 of C2, C3, incoming level L1, the L2 of B3, L3.Then, relatively incoming level L0 and incoming level L1, L2, L3 and judge whether network transitions is suitable of mobile radio station 10.When comparing incoming level, for example, use formula (1), the formula (2) of note down.

max(Li)＝max(L1，L2，L3)…(1)

max(Li)＞L0+ΔL…(2)

Here, max (parameter 1, parameter 2 ...) expression return parameters 1, parameter 2 ... the function of the parameter of middle maximum.L0 be illustrated in the network in the communication range incoming level, that Δ L represents to shift decision level is poor.Under the situation that the magnitude relationship of formula (2) is set up, mobile radio station 10 selects adjacent networks corresponding to max (Li) as transfer destination zone network, transfer network.On the other hand, under the invalid situation of magnitude relationship of formula (2), mobile radio station 10 is transfer network not.

No. 3233854 communique of patent

No. 3315869 communique of patent (the 2nd page, the 4th figure)

Summary of the invention

Network is provided with position and environment on every side corresponding to the base station, is divided into internal home network and outdoor network substantially.General internal home network is littler than outdoor network radius because indoor environment lacks than the outdoor environment disturbing factor, so in internal home network, think can guarantee to stablize, the excellent communications quality.Yet, when in above-mentioned existing technology, selecting network, become the network of the candidate on transfer destination ground, do not consider that internal home network still is which network of outdoor network.Therefore mobile radio station can not select the to communicate by letter situation of optimal network is arranged.In addition, for example network also is categorized as millimicro network, giant grid, the such kind more than 3 kinds of micronet corresponding to network radius.

So problem of the present invention is to be divided under the situation of a plurality of kinds when network, the network that mobile radio station can be selected to be suitable for communicating by letter most is as mobile destination.

In order to solve above-mentioned problem, mobile radio station of the present invention possesses: obtain the incoming level of network in communication range and the network adjacent with it acquisition device, judge above-mentioned network and the judgment means of the network kind of above-mentioned adjacent networks, the above-mentioned network kind judged according to the above-mentioned incoming level of obtaining by above-mentioned acquisition device, by the above-mentioned judgment means network selection device of selecting transfer destination ground in communication range.

In relating to network selecting method of the present invention, comprise: the acquisition device of mobile radio station obtain network in communication range and its adjacent networks incoming level obtain step; The judgment means of above-mentioned mobile radio station judge above-mentioned in communication range network and the determining step of the network kind of above-mentioned adjacent networks; The choice device of above-mentioned mobile radio station is according to the above-mentioned incoming level of obtaining by above-mentioned acquisition device and select the network selection step on transfer destination ground by the above-mentioned network kind that above-mentioned judgment means is judged.

Here in the selection on transfer destination ground, whether the network that is selected to transfer destination ground candidate comprises judgement certainly suitable to this network transitions.Like this, even under the selecteed situation of transfer destination ground candidate network, be judged as when not being optimum network as transfer destination ground at this network, mobile radio station does not carry out the transfer of network, can also continue to stay within the communication range that shifts preceding network.

According to these inventions, obtain the network in communication range and the incoming level of the network adjacent with it, judge after the kind of each network of network in communication range and adjacent networks, select the transfer destination zone network according to incoming level and network kind.Being mobile radio station judges when shifting whether suitable transfer destination ground is selected comprising, and will consider that undoubtedly the attribute of network in communication range and the incoming level in the adjacent networks, each network carries out network selection.For example mobile radio station is selected to be classified into the internal home network of the high network kind of incoming level as the transfer destination zone network.The incoming level height of internal home network can guarantee that mobile radio station is stable, the excellent communications quality, so by transferring to the network of selection, can reach communication at a high speed with low output.Being mobile radio station selects the network on transfer destination ground according to incoming level and network kind, can select the network that is suitable for communicating by letter most.

In mobile radio station of the present invention, it is desirable to, above-mentioned choice device corresponding to judge by above-mentioned judgment means above-mentioned in communication range the network of network kind, the jump condition of change network or the selection relative importance value between the network kind.

In network selecting method of the present invention, it is desirable to, in above-mentioned network selecting step, above-mentioned choice device corresponding to judge by above-mentioned judgment means above-mentioned in communication range the network of network kind, the jump condition of change network.

According to these the present invention, corresponding to network of network kind in communication range, the jump condition of change network.For example mobile radio station under the situation in the scope of internal home network, is compared with the situation of mobile radio station in the scope of outdoor network, continues to stay present network and also can guarantee to stablize the can property very high of excellent communications quality.So under these circumstances, set by strictness and to be used for the condition of network transitions, if there not be network more suitably to suppress the transfer of network like that with regard to transfer network not around.Its result, the network that mobile radio station can be selected to be suitable for communicating by letter most is as transfer destination ground.

It is desirable in mobile radio station of the present invention, above-mentioned choice device changes the jump condition of network or the selection relative importance value between the network kind corresponding to the network kind of the above-mentioned adjacent networks of judging by above-mentioned judgment means.

It is desirable in network selecting method of the present invention, in above-mentioned network selecting step, above-mentioned choice device changes the jump condition of network corresponding to the network kind of the above-mentioned adjacent networks of judging by above-mentioned judgment means.

According to these the present invention, corresponding to the network kind of adjacent networks, the jump condition of change network.For example the adjacent networks of transfer destination ground candidate is under the situation of internal home network, is that the situation of outdoor network is compared with adjacent networks, and the possibility that can guarantee to stablize the excellent communications quality under the situation that mobile radio station shifts is very high.So under these circumstances, by relaxing the condition that is used for network transitions, promote to the more suitably transfer of network.Its result, the network that mobile radio station can be selected to be suitable for communicating by letter most is as transfer destination ground.

Even more ideally in mobile radio station of the present invention be, possess the counting device of the transfer number between the different network of storage device that above-mentioned network kind and network-level are stored accordingly, the above-mentioned network-level of counting, when the above-mentioned transfer number by above-mentioned counting device counting has surpassed under the situation of setting, switch the switching device shifter of the corresponding relation of above-mentioned network kind in the above-mentioned storage device and above-mentioned network-level.

Even more ideally in network selecting method of the present invention be, comprise counting device and count the counting step of the transfer number between the different network of above-mentioned network-level, switching device shifter and surpassed under the situation of setting, switch the switch step of the corresponding relation of above-mentioned network kind in the above-mentioned storage device and above-mentioned network-level at above-mentioned transfer number by above-mentioned counting device counting.

For the present invention, follow in storage device, stored the network kind and with the corresponding relation of network-level, count the transfer number between the network different, when the corresponding relation of transfer number above handover network kind under the situation of stipulated number and network-level with network-level.These inventions are owing to the data that cause with respect to high-frequency ground transfer network transmit the generation of interruption, transmit the technology of data speed reduction to mobile radio station.Under transfer number surpassed the situation of setting, it is too high that mobile radio station is judged as the frequency of network transitions, the corresponding relation of handover network kind and network-level (making its correspondence).

Thus, the network-level that for example belongs to other internal home network of priority network level now is switched into non-priority network rank, belongs to other outdoor network of network rank of non-priority network level now simultaneously and is switched into the priority network rank.Be that network-level reverses.The adjoint network rank reverses, and the condition that is used for transfer network also changes, and also becomes strict even mobile radio station in the scope of outdoor network, is used for the condition of network transitions.So, limit the transition frequency of network, removed the misgivings that transmit the speed reduction of data to mobile radio station.

Even more ideally in mobile radio station of the present invention be, above-mentioned switching device shifter has surpassed under the situation of setting at the counting zero hour of the above-mentioned transfer number in official hour from above-mentioned transfer number, switches in the above-mentioned network kind in the above-mentioned storage device and the corresponding relation of above-mentioned network-level.

Even more ideally in network selecting method of the present invention be, in above-mentioned switch step, above-mentioned switching device shifter has surpassed under the situation of setting at the counting zero hour of the above-mentioned transfer number in official hour from above-mentioned transfer number, switches in the above-mentioned network kind in the above-mentioned storage device and the corresponding relation of above-mentioned network-level.

For the present invention, the corresponding relation of handover network kind and network-level, be limited to from the counting zero hour above-mentioned transfer number in official hour surpassed under the situation of setting.Be that the network transitions number of times begins through under the situation of official hour constantly from initialization, no matter transfer number at that time, transfer number all is initialized to 0 once more.Thus, the switching of corresponding relation and then the judgement by network transitions can reflect network transitions number of times (network transitions frequency) at the appointed time exactly.

Even more ideally in mobile radio station of the present invention be, above-mentioned switching device shifter is under the situation of the corresponding relation that has switched above-mentioned network kind and above-mentioned network-level, begin through after the official hour from this switching instant, above-mentioned corresponding relation turns back to the corresponding relation before switching.

Even more ideally in network selecting method of the present invention be, in above-mentioned switch step, above-mentioned switching device shifter is under the situation of the corresponding relation that has switched above-mentioned network kind and above-mentioned network-level, begin through after the official hour from this switching instant, above-mentioned corresponding relation turns back to the corresponding relation before switching.

For the present invention, under the situation that the corresponding relation of network kind and network-level has been switched, begin through after the official hour from this switching instant, above-mentioned corresponding relation turns back to the corresponding relation before switching.Promptly the corresponding relation after switching has kept under the situation of stipulated time as starting at some the moment that the corresponding relation of network kind and network-level is switched, and the corresponding relation of network kind and network-level forces to turn back to the corresponding relation before switching.Thus, under the situation about after in a single day network-level is switched, reducing before the frequency ratio of network transitions, the corresponding relation before can in the judgement of network transitions, reusing switching.

As mentioned above, in mobile radio station of the present invention, above-mentioned network kind is for example to represent that network is the internal home network or the information of outdoor network.

In network selecting method of the present invention, above-mentioned network kind is for example to represent that network is the internal home network or the information of outdoor network in addition.

Mobile communication system of the present invention possess the incoming level with the network obtained in communication range and adjacent networks thereof acquisition device, judge above-mentioned in communication range network and the judgment means of the network kind of adjacent networks, according to the incoming level of obtaining by above-mentioned acquisition device, by the above-mentioned network kind that above-mentioned judgment means is judged, select the transfer destination zone network choice device mobile radio station and can discern self network and the network kinds of information of adjacent networks is notified the base station of above-mentioned mobile radio station.

For the present invention, mobile radio station is based on the above-mentioned information from base station notice, can judge network in communication range and each network of network kind (whether being internal home network for example) of adjacent networks thereof.Mobile radio station can be selected the network that is suitable for communicating by letter most by the network with reference to this judged result and incoming level selection transfer destination ground.

In order to solve above-mentioned problem, mobile radio station of the present invention possesses the storage device of the relevant radio channel information of storage, screening obtains the screening plant of the adjacent networks of incoming level, in the network and adjacent networks thereof in communication range, obtain the acquisition device of the incoming level of the adjacent networks that screens by above-mentioned screening plant, judge above-mentioned in communication range network and the judgment means of the network kind of the adjacent networks of above-mentioned screening, according to the above-mentioned incoming level of obtaining by above-mentioned acquisition device, by the above-mentioned network kind that above-mentioned judgment means is judged, select the network selection device on transfer destination ground.

In addition, network selecting method of the present invention comprises the storing step of the relevant radio channel information of memory device stores of mobile radio station; The screening plant screening of above-mentioned mobile radio station obtains the screening step of the adjacent networks of incoming level; Within the network and adjacent networks thereof of the acquisition device of above-mentioned mobile radio station in communication range, obtain the adjacent networks by the screening of above-mentioned screening plant incoming level obtain step; The judgment means of above-mentioned mobile radio station judge above-mentioned in communication range network and the determining step of the network kind of the adjacent networks of above-mentioned screening; The choice device of above-mentioned mobile radio station is selected the network selection step on transfer destination ground according to the above-mentioned incoming level of obtaining by above-mentioned acquisition device, by the above-mentioned network kind that above-mentioned judgment means is judged.

Here, whether in the network selection on transfer destination ground, it is suitable to the transfer of this network to have comprised the network and the judgement that are selected to transfer destination ground marquis's benefit undoubtedly.So, even under the selecteed situation of network of transfer destination ground candidate, when judging under this network situation, mobile radio station is not carried out the transfer of network and is continued to stay in the original network range with being not suitable as transfer destination.

For the present invention, obtain the network in communication range and the incoming level of adjacent networks thereof, after the network and each network of network kind of adjacent networks thereof of judgement in communication range, select the network on transfer destination ground according to incoming level and network kind.The attribute of network that to be mobile radio station will consider when selecting the transfer destination zone network undoubtedly in communication range and the incoming level in the adjacent networks thereof, each network carries out network selecting.When for example mobile radio station shifted in the electric car that constitutes the mobile network, mobile radio station was selected the mobile network as the transfer destination zone network.Mobile radio station in the mobile network, guaranteed than outdoor network and internal home network excellent communications quality, so, can reach low output and communication at a high speed by transferring to the network of selection.Be the network of mobile radio station, can select the network that is suitable for communicating by letter most according to incoming level and network kind selection transfer destination ground.

It is desirable in mobile radio station of the present invention, above-mentioned choice device changes the jump condition of network or the selection relative importance value between the network kind corresponding to the above-mentioned network of network kind of judging by above-mentioned judgment means in communication range.

Even more ideally in mobile radio station of the present invention be, above-mentioned choice device is corresponding to the network kind of the above-mentioned adjacent networks of judging by above-mentioned judgment means, the jump condition of change network.

In network selecting method of the present invention, it is desirable to, in above-mentioned selection step, above-mentioned choice device changes the jump condition of network and the selection relative importance value between the network kind corresponding to the above-mentioned network of network kind of judging by above-mentioned judgment means in communication range.

Even more ideally in network selecting method of the present invention be that in above-mentioned selection step, above-mentioned choice device is corresponding to the network kind of the above-mentioned adjacent networks of judging by above-mentioned judgment means, the jump condition of change network.

In mobile radio station of the present invention, it is desirable to, the jump condition of above-mentioned network comprises the jump condition below at least: when the incoming level of the network in communication range is lower than the 1st critical value of regulation, in the adjacent networks of the incoming level that satisfies regulation, the jump condition of the highest adjacent networks of incoming level as the transfer destination zone network; The difference of the incoming level of the network in communication range is surpassed the jump condition of the highest adjacent networks of the hysteresis of regulation and incoming level as the transfer destination zone network; Irrelevant with the incoming level of network in communication range, the jump condition of the adjacent networks of the high state continuance certain hour of incoming level as the transfer destination zone network; When the change of the unit interval of the incoming level of the network in communication range surpasses the 2nd critical value of regulation, in incoming level surpasses the adjacent networks of the 3rd critical value of regulation, the jump condition of the highest adjacent networks of incoming level as the transfer destination zone network.

In network selecting method of the present invention, it is desirable to, the jump condition of above-mentioned network comprises the jump condition below at least: when the incoming level of the network in communication range is lower than the 1st critical value of regulation, in the adjacent networks of the incoming level that satisfies regulation, the jump condition of the highest adjacent networks of incoming level as the transfer destination zone network; The difference of the incoming level of the network in communication range is surpassed the jump condition of the highest adjacent networks of the hysteresis of regulation and incoming level as the transfer destination zone network; Irrelevant with the incoming level of network in communication range, the jump condition of the adjacent networks of the high state continuance certain hour of incoming level as the transfer destination zone network; When the change of the unit interval of the incoming level of the network in communication range surpasses the 2nd critical value of regulation, in incoming level surpasses the adjacent networks of the 3rd critical value of regulation, the jump condition of the highest adjacent networks of incoming level as the transfer destination zone network.

For the present invention, corresponding to the kind of network in communication range and adjacent networks thereof, the jump condition of change network.For example mobile radio station is compared in the situation of outdoor network range with mobile radio station under the situation of the scope of internal home network, stay in the present network range guarantee to stablize the excellent communications quality can the property height.So, under these circumstances, when the incoming level of the network of mobile radio station in communication range is lower than the critical value of regulation, in the adjacent networks of the incoming level that satisfies regulation, the highest outdoor network of incoming level as the transfer destination zone network, is set suitable jump condition simultaneously.Thus, do not transfer to outdoor network, transfer that can limiting network at the communication quality of the communication range network moving station of time shift that do not degenerate.

And then in the network range of mobile network for transfer chamber's outer network, even do not shift mobile radio station itself, the incoming level difference between mobile network and the outdoor network is also not necessarily fixing.So, jump condition when transferring to the mobile network as mobile radio station, use incoming level difference of network (outdoor network or internal home network) and adjacent networks (mobile network) in communication range is unsatisfactory, and the incoming level that it is desirable to an adjacent networks (mobile network) in this case is as jump condition.So under the situation more than the high state continuance certain hour of mobile network's incoming level, the transfer that mobile radio station is judged as in the mobile network is desirable, and the mobile network is defined as the transfer destination zone network.Perhaps work as the change of the unit interval of the incoming level of network in communication range more than setting, and as the mobile network's of adjacent networks incoming level under the situation more than the setting, the transfer that mobile radio station is judged as in the mobile network is desirable, and the mobile network is defined as the transfer destination zone network.

As mentioned above, in mobile radio station of the present invention, above-mentioned network kind is for example to represent that network is which the information among internal home network, outdoor network or the mobile network.

In addition, in network selecting method of the present invention, above-mentioned network kind is for example to represent that network is which the information among internal home network, outdoor network or the mobile network.

Mobile communication system of the present invention possesses above-mentioned mobile radio station, the base station of the network kinds of information notice mobile radio station that can discern self network and adjacent networks thereof.For the present invention, mobile radio station is based on the above-mentioned information from base station notice, can judge network in communication range and each network of network kind (for example internal home network, outdoor network, mobile network) of adjacent networks thereof.Mobile radio station is with reference to this judged result and incoming level, and then by the jump condition according to this judged result change network, can select the network that is suitable for communicating by letter most.

In mobile communication system of the present invention, it is desirable to, possess the base station that an information relevant with physical layer is notified above-mentioned mobile radio station.

The information relevant with physical layer of said above-mentioned network is the information that identification receives the channel that detects level in addition, or is used to discern the information of the channel that detects communication and incoming level.

For the present invention, mobile radio station can be transferred to the adjacent network that uses the communication different with the network in communication range.The communication that for example uses outdoor network and internal home network is CDMA (sign indicating number is cut apart multiple access), or the mobile network with the mobile network in mobile radio station between communicate by letter in the communication that uses be under the situation of OFDM (orthogonal frequency division frequency multiplexing technique) mode, if can use the mobile radio station of two kinds of communication modes of CDMA mode and OFDM mode, just can compatibly carry out network transitions from the network in communication range to adjacent mobile network.

For the present invention, mobile radio station can select the network that is suitable for communicating by letter most as the destination of shifting.

Brief description of drawings

Fig. 1 is the pie graph that is used to illustrate existing network selecting method.

Fig. 2 is the figure that summary is represented all formations of mobile communication system among the embodiment 1.

Fig. 3 is a block diagram of showing the function formation of the mobile radio station among the embodiment 1.

Fig. 4 (a) shows that network-level switches the figure of the storage example of network-level table inside in the past.

Fig. 4 (b) shows that network-level switches the figure of the storage example of network-level table inside later on.

Fig. 5 is the figure that shows the storage example that shifts decision level difference table inside.

Fig. 6 is the flow chart that is used to illustrate the network transitions judgment processing.

Fig. 7 is the flow chart that is used to illustrate network transitions judgment processing vague generalization example.

Fig. 8 is used to illustrate the network configuration that the network transitions frequency of mobile radio station is high and the figure of transfer path.

Fig. 9 displaying changes the presentation graphs of the magnitude relationship of the incoming level of each network at any time corresponding to mobile station location.

Figure 10 is the flow chart that is used to illustrate the network level hand-off process.

Figure 11 is the figure that summary is represented all formations of mobile communication system among the embodiment 2.

Figure 12 is a block diagram of showing the function formation of mobile radio station among the embodiment 2.

Figure 13 is the concept map of corresponding relation that is illustrated in the jump condition of the network kind of network in the communication range and adjacent networks thereof and network.

Figure 14 is the figure that is used for illustrating the selection relative importance value between embodiment 2 network transitions conditions and the network kind.

Embodiment

(embodiment 1)

The following detailed description in detail with reference to accompanying drawing relates to embodiments of the invention 1.

Fig. 2 is a concept map of showing that mobile communication system constitutes in the present embodiment.As shown in Figure 2, mobile communication system 100 possesses and is made of mobile radio station 1, base station B10, base station B11～B13, base station B21～B22.Mobile radio station 1 is in the scope of the network C 10 that is formed by base station B10.As the adjacent internal home network of network C 10, exist by base station B11, B12, the network C 11 of each self-forming of B13, C12, G13.Outdoor network as adjacent with network G 10 exists by base station B21, the network C 21 of each self-forming of B22, C22.In Fig. 2, internal home network is illustrated by the broken lines, outdoor network is represented by chain-dotted line simultaneously.

Base station B10 is appended to C11～C13 and network C 21, C22 in the information of all existence as adjacent networks, be internal home network or the information (identifying information) of outdoor network (corresponding to the network kind) notice mobile radio station 1 discerning each network.Be that base station B10 is the identifying information of the network kind of expression self network C 10, expression adjacent networks C11～C13 that the identifying information of internal home network, the identifying information that expression adjacent networks C21, C22 are outdoor network are notified mobile radio station 1 as announcement information M1.

In addition, base station B10 also can be network C 11～C13 and network C 21, C22 as the information of all existence of adjacent networks and represent that self network C 10 is internal home network or the identifying information of outdoor network notice mobile radio station 1, notifies the base station of each network of formation the identifying information of the network kind of relevant each adjacent networks of expression C11～C13, C21, C22.

Next, describe the mobile radio station of the main inscape that relates to mobile communication system of the present invention in detail.Fig. 3 is a block diagram of showing the function formation of mobile radio station 1.As shown in Figure 3, mobile radio station 1 possesses announcement information receiving-member 2 at least, incoming level is obtained parts 3 (corresponding to acquisition device), network-level decision means 4 (corresponding to judgment means), transfer destination ground alternative pack 5 (corresponding to choice device), network transitions parts 6, network transitions number of times counter block 7 (corresponding to counting device), network-level switching part 8 (corresponding to switching device shifter).

Announcement information receiving-member 2 passes through radio channel reception notification information M1 from the base station B10 that is formed on the network C 10 in the communication range of mobile radio station 1.In announcement information M1, comprise the identifying information of expression network kind, the identifying information of the network kind of network C 11～C13, C21～C22 that expression and network C 10 are adjacent by expression network C 10.

Incoming level is obtained parts 3 based on the announcement information M1 that receives by announcement information receiving-member 2, detects the incoming level of each network C 10, C11～C13, C21～C22.So, mobile radio station is obtained the incoming level of all networks that can shift.

Network-level decision means 4 is judged the network-level of the network C 10 in communication range with reference to following network-level table 41 (corresponding to storage device).Network-level is the information that mobile radio station 1 is used to judge the index that becomes the preferential network in communication range.When network-level is under other situation of priority network level, to compare with non-other situation of priority network level, the condition that mobile radio station 1 is used for transfer network becomes strict.

Fig. 4 (a) is the figure that shows the configuration example of network-level table 41.Shown in Fig. 4 (a), network-level table 41 has network kind zone 41a and network-level zone 41b.In the 41a of network kind zone, the network that is illustrated in the communication range of having stored the conduct " network kind " of mobile radio station 1 is the internal home network or the information of outdoor network.In the 41b of network-level zone, corresponding to the network of network kind, having stored expression as " network-level ", to belong to the priority network rank also be non-other information of priority network level.So, network-level is corresponding one by one with the network kind, so mobile radio station 1 has also been judged the network kind indirectly when judging network-level.

During the starting of mobile radio station 1, as the initial setting of network-level, internal home network is classified into the priority network rank, outdoor network is classified into non-priority network rank.These information can suitably be upgraded as required.Relevant explanation in detail afterwards for example belongs under the situation of critical value (for example 5 times) that transfer number between other network of heterogeneous networks level surpasses regulation, mobile radio station 1 network-level in the 41b of network-level zone that also can reverse.

Transfer destination ground alternative pack 5 is selected the transfer destination zone network of mobile radio station 1 according to the incoming level of obtaining each network that parts 3 obtain by incoming level, judge each network of network ranks by network-level decision means 4.Here in the selection on transfer destination ground, comprise the judgement of whether suitable self of network transitions.Even selected under the situation of transfer destination zone network, also unqualified must the execution transferred to this network.

In addition, transfer destination ground alternative pack 5 is when selecting the transfer destination zone network, with reference to shifting decision level difference table 51.Fig. 5 is the figure that shows the configuration example that shifts decision level difference table 51.As shown in Figure 5, in shifting decision level difference table 51, it is poor to shift decision level as the 1st～the 3rd, has stored Δ L (1), Δ L (2), Δ L (3).Above-mentioned triphasic transfer decision level difference is to satisfy the numerical value of Δ L (1)＜Δ L (2)＜Δ L (3) relation.

Δ L (1) be used to belong to non-priority network level other in communication range network and belong to the comparison of the incoming level between the priority network rank adjacent networks.The value of Δ L (1) is, for example-3dB about.

Δ L (2) is used for belonging under other situation of consolidated network level when network and adjacent networks in communication range, relatively the incoming level between network and the adjacent networks in communication range.The value of Δ L (2) is, for example about 6dB.In addition, Δ L (2) certainly gets different value corresponding to whether network in the communication range belongs to the priority network rank.In this case, shift the decision level difference and be configured to the quadravalence section.

Δ L (3) be used to belong to the priority network level other in communication range network and belong to the comparison of the incoming level between the non-priority network rank adjacent networks.The value of Δ L (3) is, for example about 9dB.

Network transitions parts 6 are selected the transfer destination zone network by transfer destination ground alternative pack 5.And when determining under the situation of certain network transitions, to carry out the transfer of network.Said network transitions is meant the sender base station of mobile radio station 1 change reception notification information.In addition, network transitions parts 6 are to the network transitions notice of the meaning of network transitions number of times counter block 7 output expression network transitions end.Whether the transfer that this network transitions notice comprises the notified network of expression belongs to the information between other network of heterogeneous networks level.

Network transitions number of times counter block 7 is according to the network transitions notice from 6 inputs of network transitions parts, counting belongs to the transfer number between other network of heterogeneous networks level, network transitions number of times counter block 7 is keeping becoming the network transitions number of times critical value Nth of other judgment standard of handover network level, and monitors the magnitude relationship of the transfer number and the network transitions number of times critical value Nth of above-mentioned counting all the time.In addition, be higher than when transfer number under the situation of network transitions number of times critical value, network transitions number of times counter block 7 sends other indication of handover network level for network-level switching part 8.

Other indication of handover network level that network-level switching part 8 receives from network transitions number of times counter block 7, accesses network rank table 41, the corresponding relation of handover network kind and network-level.Be that network-level switching part 8 is set non-priority network rank for being set among the 41b of other network-level zone of priority network level; Set the priority network rank for being set among the 41b of other network-level zone of non-priority network level.Its result is shown in Fig. 4 (b), and the network-level in the network-level table 41 is inverted.

Next the work of mobile communication system is described.Each step that relates to network selecting method of the present invention is described simultaneously together.Fig. 6 is the flow chart that is used to illustrate the network transitions judgment processing of being carried out by mobile radio station 1.

At first the announcement information receiving-member 2 of mobile radio station 1 receives the announcement information M1 (S1) of the base station B10 of the network in the comfortable communication range.

Incoming level is obtained parts 3 with reference to the announcement information M1 that receives from base station B10, detects incoming level L10, base station B11～B13, B21 from each adjacent networks, incoming level L11～L13, the L21 of B22, L22 (S2) from base station B10 respectively.

Next, network-level decision means 4 is with reference to network-level table 41, and the network C 10 of judgement in communication range belongs to which network-level (S3) in priority network rank and the non-priority network rank.

Under this judged result is the situation of network C 10 at outdoor network in the communication range, owing to belong to non-priority network rank, transfer destination zone network alternative pack 5 is selected the transfer destination zone network according to the incoming level of network in communication range and the comparative result of the incoming level of the adjacent networks that belongs to priority level.Specifically be that transfer destination zone network alternative pack 5 uses following formula (3), (4) to carry out the selection of transfer destination zone network.

max(Li(1))＝max(L11，L12，L13)…(3)

max(Li(1))＞L0+ΔL(1)…(4)

Here, max (parameter 1, parameter 2 ...) be expression return parameters 1, parameter 2 ... the function of the parameter of middle maximum.In addition, L0 is illustrated in the incoming level of the network in the communication range, Δ L (1) expression the 1st transfer decision level is poor as mentioned above.And then (1) expression belongs to the incoming level of other adjacent networks of priority network level.

Under the situation that formula (4) is set up (S4:Yes), transfer destination zone network alternative pack 5 selects the adjacent networks corresponding with max (Li (1)) as the transfer destination zone network, and network transitions parts 6 are sent the indication of transferring to this network.In ensuing processing, the network transitions parts 6 that receive the network transitions indication are transferred to mobile radio station 1 in the network of S4 selection (S6).Finish to shift and finish a series of network transitions judgment processing later on.

To this, (S4:No) transfers to the processing of S5 under the invalid situation of formula (4).

In S5, the incoming level of 5 pairs of networks in communication range of transfer destination zone network alternative pack compares with the identical incoming level that belongs to other adjacent networks of non-priority of network in communication range, selects the transfer destination zone network according to this comparative result.Be that transfer destination zone network alternative pack 5 uses following formula (5), (6) to select the transfer destination zone network.

max(Li(2))＝max(L21，L22)…(5)

max(Li(2))＞L0+ΔL(2)…(6)

Here, max (parameter 1, parameter 2 ...) be expression return parameters 1, parameter 2 ... the function of the parameter of middle maximum.In addition, L0 is illustrated in the incoming level of the network in the communication range, Δ L (2) expression the 2nd transfer decision level is poor as mentioned above.And then L1 (2) expression belongs to the incoming level of non-other adjacent networks of priority network level.

The result of above-mentioned judgement, under the situation that formula (5) is set up (S5:Yes), transfer destination zone network alternative pack 5 selects the adjacent networks corresponding with max (Li (2)) as the transfer destination zone network, and network transitions parts 6 are sent the indication of transferring to this network.In S6, the network transitions parts 6 that receive the network transitions indication are transferred to mobile radio station 1 in the network of S5 selection.Finish to shift and finish a series of network transitions judgment processing later on.

To this, (S5:No) do not carry out the transfer end network judgment processing of network under the invalid situation of formula (6).

Next, with regard to the judgment processing result among the S3, illustrate that the network of judging in communication range is processing performed under the situation of priority level.The incoming level of the adjacent networks that belongs to priority level that the incoming level of 5 pairs of networks in communication range of transfer destination zone network alternative pack is identical with the network in communication range compares, and selects the transfer destination zone network according to this comparative result.

Be that transfer destination zone network alternative pack 5 uses following formula (7), (8) to select the transfer destination zone network.

max(Li(1))＝max(L11，L12，L13)…(7)

max(Li(1))＞L0+ΔL(2)…(8)

Under the situation that formula (8) is set up (S7:Yes), transfer destination zone network alternative pack 5 selects the adjacent networks corresponding with max (Li (1)) as the transfer destination zone network, and network transitions parts 6 are sent the indication of transferring to this network.Next, the network transitions parts 6 that receive the network transitions indication are transferred to mobile radio station 1 in the network of S7 selection (S6).Finish to shift and finish a series of network transitions judgment processing later on.

To this, (S7:No) transfers to the processing of S8 under the invalid situation of formula (8).

In S8, the incoming level of 5 pairs of networks in communication range of transfer destination zone network alternative pack compares with the identical incoming level that belongs to other adjacent networks of non-priority of network in communication range, selects the transfer destination zone network according to this comparative result.

Be that transfer destination zone network alternative pack 5 uses following formula (9), (10) to select the transfer destination zone network.

max(Li(2))＝max(L21，L22)…(9)

max(Li(2))＞L0+ΔL(3)…(10)

Δ L (3) expression the 3rd transfer decision level is poor as mentioned above.

Above-mentioned judged result, under the situation that formula (10) is set up (S8:Yes), transfer destination zone network alternative pack 5 selects the adjacent networks corresponding with max (Li (2)) as the transfer destination zone network, and network transitions parts 6 are sent the indication of transferring to this network.Next, the network transitions parts 6 that receive the network transitions indication are transferred to mobile radio station 1 in the network of S8 selection (S6).Finish to shift and finish a series of network transitions judgment processing later on.

To this, (S8:No) do not carry out the transfer of network under the invalid situation of formula (10), finishes the judgment processing of network transitions.

For mobile communication system 100, mobile radio station 1 belongs to non-other situation of priority network level and belongs to other situation of priority network level the network in communication range by carrying out the network transitions judgment processing, adopts different network transitions conditions as mentioned above.Specifically be to belong under non-other situation of priority network level mobile radio station 1 in the scope of outdoor network when network in communication range, thus the network in communication range with belong to other situation of priority network level relatively, use that low to shift decision level poor.Thus, relax the jump condition from outdoor network, the ratio that mobile radio station 1 leaves outdoor network uprises.In other words, the network in communication range belongs under other situation of priority network level mobile radio station 1 in the scope of internal home network, compares and uses that high to shift decision level poor so belong to non-other situation of priority network level with network in communication range.Thus, become strict from the jump condition of internal home network, the ratio that mobile radio station 1 stays within uprises.

Mobile radio station 1 is no matter which network-level the network in communication range belongs to, to belonging to other adjacent networks of priority network level and belonging to the different network transitions condition of other adjacent networks employing of non-priority network level in addition.Specifically be, belonging to other adjacent networks of priority network level is internal home network, thus mobile radio station 1 with belong to other adjacent networks of non-priority network level and use when selecting the transfer destination zone network relatively that low to shift decision level poor.Thus, relax the jump condition to internal home network, mobile radio station 1 uprises to the ratio that internal home network shifts.In other words, belonging to non-other adjacent networks of priority network level is outdoor network, thus mobile radio station 1 with belong to other adjacent networks of priority network level and use relatively that high to shift decision level poor.Thus, become strict, can reduce the ratio of mobile radio station 1 to outdoor network transitions to the jump condition of outdoor network.

Be that mobile radio station 1 suitably changes the transfer destination zone network according to the surrounding environment that is included in the network in the communication range.Thus, can select the higher adjacent networks of communication stability as the transfer destination zone network, mobile radio station 1 can carry out with the base station between stable communicating by letter.Consequently mobile radio station 1 can hang down output, communication at a high speed.

Here, in above-mentioned network transitions judgment processing, only there are preferential, non-preferential two classes in the imagination network-level, and only there is the situation of internal home network, outdoor network two classes in the network kind.Relate to transfer network selection technology of the present invention, be categorized into separately under the situation of M (M is the integer more than 3) kind at network-level and network kind, for example network-level is categorized into relative importance value 1, relative importance value 2,3 three kinds of relative importance value, and the network kind is categorized under the situation of millimicro network, giant grid, three kinds of micronet and still can be suitable for.Fig. 7 is the network transitions judgment processing flow chart of showing as comprising the vague generalization example of such situation.Present networks shifts judgment processing owing to comprised with reference to a plurality of common step in the network transitions judgment processing of Fig. 6 explanation, so append same column step number (number that the end is identical), the explanation of having omitted repeating step simultaneously in the step of correspondence.S11, S12, the S16 that specifically is among Fig. 7 to be showed is equivalent to S1, the S2, the S6 that show among Fig. 6 separately.

Distinctive step in this example below is described.

When the processing of S11 and S12 finishes, 4 references of network decision means and M network kind and M the corresponding network-level table of network-level (not diagram), simultaneously according to the network kind that is included in the announcement information, the network-level k (k is the integer of 1～M) that is identified in the network belonging in the communication range (S13).

Network-level k in communication range is network-level and the network species number M integer more than 1 as the upper limit.Here, the value 1 of k is to represent the highest relative importance value.

In S14, network decision means 4 is used to " 1 " substitutions as initial value to discern the aggregate-value n (n is a natural number) of the network-level of adjacent networks.

In S15, the comparative result of the incoming level of the network of transfer destination zone network alternative pack 5 bases in communication range and the incoming level of adjacent networks is selected the transfer destination zone network.Specifically be that transfer destination zone network alternative pack 5 uses following formula (11), (12) to carry out the selection of transfer destination zone network.

max(Li(n))＝max(Ln1，Ln2，…Lnm)…(11)

max(Li(n))＞L0+ΔL(nk)…(12)

Here, Ln1～Lnm is an adjacent network in the network C 10 in communication range.The network kind represents to belong to the incoming level of network C n1～Cnm of network-level n.In this incoming level, use the value that detects by S12.Max (Li (n)) is the function that incoming level value maximum among Ln1～Lnm is returned in expression.In addition, incoming level, Δ L (nk) expression network-level k that L0 is illustrated in the network C 10 in the communication range belong under the situation of the network in communication range, and the incoming level L0 of the network in the communication range employed transfer decision level of comparing with the incoming level Ln1～Lnm that belongs to network-level n adjacent networks is poor.For example, be under the situation of M when the network-level number, shift the decision level difference and be Δ L (11), Δ L (12) ... Δ L (1M), Δ L (21) ..., Δ L (2M) ... Δ L (MM) exists 2 powers of M individual like that.

The situation of M=3 for example,

ΔL(MM)＝-3，3，6、3，6，9、6，9，12

To shift decision level poor so there are 9, is set in respect of the transfer decision level difference in 2M-1 stage.In addition, these shift decision level differences and can set the stage arbitrarily for undoubtedly corresponding to the formation of network etc.

In addition, when network-level 1 becomes the highest network-level of relative importance value, if each relation that shifts between decision level difference is

Δ(1k)＜Δ(2k)＜…＜Δ(Mk)…(13)

Δ(n1)＜Δ(n2)＜…＜Δ(nM)…(14)

Jump condition to the network that belongs to the high network-level of relative importance value is relaxed, and is strict to the jump condition change of the network that belongs to the low network-level of relative importance value.

For example, k=2 under the situation of n=1, uses and above-mentioned formula (3), (4) identical formula, carries out the processing identical with the S4 of Fig. 6.

In S15, under the situation that formula (12) is set up (S15:Yes), the adjacent networks that transfer destination zone network alternative pack 5 is selected corresponding max (Li (n)) is as the transfer destination zone network, and network transitions parts 6 are sent the indication of transferring to this network.In ensuing processing, the network transitions parts 6 that received the network transitions indication are transferred to mobile radio station 1 in the adjacent networks of being selected by S15 (S16).Finish to shift and finish a series of network transitions judgment processing later on.

To this, under the invalid situation of formula (12) (S15:No), transfer in the processing of S17 of following explanation.

In S17, network decision means 4 judges whether n=M sets up, and whether the aggregate-value n of network-level that is used to discern adjacent networks that promptly judge to shift use when judging reaches network-level is counted M.This judged result is that n reaches under the situation of M (S17:Yes), and mobile radio station 1 does not carry out finishing a series of network transitions judgment processing from the transfer of the network C in communication range 10.

On the other hand, the judged result in S17, n does not still reach under the situation of M, promptly under the situation of n＜M (S17:No), transfers to S18.In S18, network decision means 4 adds 1 in present aggregate-value n become n=n+1.This processing turns back to S15 after finishing, and carries out the later processing of S15 once more.

Promptly in the processing of the S15 of last time, be not selected as the transfer destination zone network in the middle of belonging to adjacent networks Cn1～Cnm of network-level n, so in new S15, attempt from affiliated adjacent networks C (n+1) 1～C (n+1) m of the network-level (n+1) lower, selecting the transfer destination zone network than network-level n relative importance value.

By carrying out a series of processing of S15～S18 repeatedly, mobile radio station 1 is employed transfer decision level difference Δ L (nk) in selecting the transfer destination zone network, till the aggregate-value n of network-level of identification adjacent networks reaches several M of network-level and network kind, be updated to successively Δ L (1k), Δ L (2k) ..., Δ L (Mk).In addition, in shifting decision level difference Δ L (nk),, set different values for according to the network-level k under the network C in communication range 10 even aggregate-value n is identical.Mobile radio station 1 can suitably change the jump condition of network corresponding to the network-level k of the network C in communication range 10 like this.In addition as mentioned above, come setting network rank k according to the network kind.So, as this example, under network-level is categorized into situation more than 3, can change network transitions condition corresponding to the network kind of the network C in communication range 10.

In the network transitions judgment processing of reference Fig. 6 explanation, mobile radio station 1 becomes belong to other internal home network of priority network level into the priority level that belongs in other outdoor network of non-priority network level as the transfer of network.In such network transitions judgment processing, worry that (for example between internal home network and the outdoor network) carries out network transitions continually between the network of different network-level belonging to.Such worry is for example particularly remarkable under the situation of high speed transfer near the marginal portion of the network of mobile radio station 1 in communication range.Below, internal home network being categorized into the priority network rank and outdoor network class is become under non-other situation of priority network level, the too high situation of transition frequency of imagination network illustrates the solving device relevant with it.

Fig. 8 is the pie graph that schematic representation mobile radio station 1 is positioned at the mobile communication system of the network different with above-mentioned example.As shown in Figure 8, base station B31 forms outdoor network C 31, base station B41, B42, each self-forming internal home network C41 of B43, C42, C43.In Fig. 8, dotted line is represented internal home network, and chain-dotted line is represented outdoor network.In the present embodiment, mobile radio station 1 is at least in the scope of outdoor network C 31, and near the marginal portion of outdoor network C 31, the route represented through solid arrow Y1 comes and goes between position A and position B.

Under above-mentioned condition, in Fig. 9, showed position, from the state of the incoming level of each base station change corresponding to mobile radio station 1.In Fig. 9, transverse axis has been stipulated the position of mobile radio station 1, and the longitudinal axis has been stipulated the incoming level from base station B31, B41～B43 corresponding to the position of mobile radio station 1.The shown dotted line of L31, L41～L43 is represented to follow the displacement of mobile radio station 1 and the state that changes from the incoming level of base station B31, B41～B43 separately.Always in the scope of outdoor network C 31, for each network of the internal home network C41～C43 that comes in and goes out, the amplitude of fluctuation of incoming level L31 is little for mobile radio station 1, and the amplitude of fluctuation of L41～L43 is big.

Like this, belong to the priority network rank for internal home network, outdoor network belongs to non-priority network rank, and mobile radio station 1 is when carrying out above-mentioned network transitions judgment processing, and 6 places that amount to of the P1～P6 that represents in Fig. 8 and Fig. 9 have carried out the transfer of network.High-frequency like this network transitions is recruited to the control of the deterioration of circuit quality and system load and is increased, and has to hinder stable communicating by letter between mobile radio station and the base station.So where necessary, it is desirable to suppress the transition frequency of network with certain device.

With reference to Fig. 9, the transfer of network, the reason of the frequent change of the magnitude relationship of incoming level L31 and incoming level L41～L43 and situation about taking place are predicted.For this reason, when suppressing the frequency of network transitions, the critical value that enlarges as the incoming level L31 of the benchmark that need to judge whether transfer network is effective.By in critical value, obtaining the represented incoming level L31+ Δ L3 (3) of dotted line, regardless of the violent change of incoming level L41～L43, always critical value is greater than incoming level L41～L43.In this case, the transfer that does not produce network in the process that mobile radio station 1 shifts between position A, B.

In order to obtain the incoming level of the big above-mentioned critical value of conduct, for example consider counter-rotating network level method for distinguishing.Be that the represented network-level table 41 of Fig. 4 (b) is such, by internal home network being categorized into non-priority network rank and outdoor network class being become the priority network rank, judge that from the transfer of some networks of network C 31 to network C 41～C43 employed transfer decision level difference is altered to Δ L (3) from Δ L (1).Owing to Δ L (3)＞Δ L (1), L31+ Δ L3 (3) is bigger than the value of L31+ Δ L3 (1), has reduced the transition frequency of network as narrating.

Below, as a example for the processing that suppresses high-frequency ground transfer network, the network-level hand-off process of carrying out by mobile radio station 1 with reference to Figure 10 explanation.

As the prerequisite of action specification, the network-level hand-off process is the processing that is independent of above-mentioned transfer judgment processing.Undoubtedly can with network transitions judgment processing executed in parallel.The network-level hand-off process with the starting of mobile radio station 1 to start with constantly.

At first, network transitions number of times counter block 7, by " 0 " as the transfer number N of initial value substitution network, initialization also keeps the transfer number (T1) of network.

Network transitions number of times counter block 7 input of monitoring network call announcement always.Detect the input of network transitions notice from network transitions parts 6,, judge that whether mobile radio station 1 is belonging to transfer (T2) between the network of different network-level based on this network transitions notice.

This judged result meets under the situation of above-mentioned transfer (T2:Yes), and network transitions number of times counter block 7 adds " 1 " on network transitions counts value, become N=N+1 (T3).

In T4, the transfer number N of the relatively more present network constantly of network transitions number of times counter block 7 and the magnitude relationship of network transitions number of times critical value Nth.Result relatively satisfies under the situation of N＞Nth (T4:Yes), transfers to T5, and switches the network-level that is stored in network-level zone 41b now by network-level switching part 8.Concrete is sets the network-level as the network kind of corresponding internal home network for non-priority network rank, and the network-level as the network kind of respective chamber/chambers outer network is set for the priority network rank.

On the other hand, relatively result does not satisfy under the situation of N＞Nth (T4:No) in T4, still judges the high-frequency network transitions that do not need to become the handover network rank such, returns T2.In addition, network transitions number of times counter block 7 is carried out the processing of T2～T4 repeatedly till N surpasses Nth.

The transfer number N of network is higher than network transitions number of times critical value Nth, finishes after the switching of the network-level shown in the T5, transfers to the T1 and the transfer number N of initialization network once more, carries out the later processing of T1 repeatedly.

Network-level under each network C 31, C41～C43 of reversing, the network C 31 of mobile radio station 1 in communication range belongs to the priority network rank, and the adjacent networks C41～C43 of mobile radio station 1 belongs to non-priority network rank.So, when carrying out the network transitions judgment processing, the Δ L3 (with reference to the S8 of Fig. 6) of decision level difference is shifted in the conduct the when mobile radio station 1 of Fig. 8 has used relatively incoming level.Suppose not carry out under the situation of counter-rotating of network-level, continue to use Δ L1, because Δ L (3)＞Δ L (1), the counter-rotating by network-level makes the jump condition of network become strict, follow the timeliness of the incoming level of adjacent networks C41～C43 to change, the network transitions frequency reduces.

As mentioned above, in call forwarding system 100, it is desirable to, mobile radio station 1 adjoint network shifts carries out all previous counting to the network of network rank change frequency in communication range, when being judged as under situation about frequently shifting between the different network of network-level the corresponding relation of counter-rotating network kind and network-level.Like this, whether suitable the transfering state by autonomous handover of mobile stations 1 and corresponding to the classification of the network-level of surrounding environment can enlarge the incoming level critical value as the transfer of judging network judgment standard.So, the transition frequency that has suppressed network.Consequently, reduce and suppressed the interruption that the data of the transfer of adjoint network transmit, improved the throughput of system, can reduce the control load that adjoint network shifts simultaneously.

The state of record in the present embodiment in addition relates to the desirable example of call forwarding of the present invention system, and the present invention is not limited to above-mentioned state.

Starting timer T01 (not diagram) in the time of for example with the initialization (with reference to the T1 of Figure 10) of network transitions number of times, the elapsed time that timer T01 represents arrives the moment of stipulated time (for example about 10 minutes), no matter that network transitions count value N constantly also can be network transitions count value N initialization.By such processing, the network transitions number of times that belongs between other network of heterogeneous networks level surpasses under the situation of critical value Nth in the time at afore mentioned rules, can limit the condition of counter-rotating network-level.So, can carry out the judgement of network transitions according to the network transitions frequency of more accurate counting.Such condition enactment is applicable to that mobile radio station 1 comes and goes situation about shifting at a high speed in same routes, has special effect.

And then, the corresponding relation of network kind and network-level is from moment (with reference to the T5 of Figure 10) that initial setting is switched starting timer T02 (not diagram), the elapsed time of timer T02 reaches under the situation that the corresponding relation different with above-mentioned initial setting continued till the stipulated time (for example about 5 minutes), can force turn back to initial setting to this corresponding relation.So, in a single day network-level is switched the transition frequency of back network than under the situation about reducing in the past, can be used for the corresponding relation of initial setting the judgement of network transitions once more.Consequently, till the necessity reduction of using the corresponding relation different, can prevent that such corresponding relation from continuing to be used with initial setting.

(embodiment 2)

Next, with reference to Figure 11～Figure 14 embodiments of the invention 2 are described.In the mobile communication system of embodiment 2, comprised with embodiment 1 in common inscape, the contents processing of mobile communication system, so be described in detail the difference relevant with the foregoing description 1.

Be in the network selecting technology of 1 li of embodiment,, do not consider mobile network's existence as one of network form.Said mobile network is made of moving bodys such as electric car and buses, even shift in mobile communication system, also keeps it to constitute in the same old way, is to have the network that continues the mechanism of communication between the mobile radio station that can make in this network and the mobile communication system.The mobile network communicates by outside base station (outdoor network and internal home network) and radio-circuit, and the mobile radio station in the mobile network is gone up the terminal connection mobile communication system that is provided with by the mobile network.

Like this, mobile radio station directly is not connected with external base station, utilizes the mobile network to connect, and has the advantage of saving electric power and obtaining stable communication quality.So, network in communication range or adjacent networks are under mobile network's the situation, because above-mentioned mobile network needs to consider the network selecting method different with outdoor network with the internal home network in embodiment 1.Mobile communication system among the embodiment 2 achieves.

Narration after detailed system constitutes, the principal character of present embodiment is corresponding to the kind of the network in communication range of mobile radio station and adjacent networks, change network transitions condition, and corresponding to the selection relative importance value between network of network kind in communication range, the change network kind.Be this mobile communication system according to the network in communication range be that among internal home network, outdoor network, the mobile network which determines the network transitions condition changeably.In addition, be that among internal home network, outdoor network, the mobile network which determines the jump condition of network changeably also according to adjacent networks.And then native system is corresponding to the kind of the network in communication range of mobile radio station, and whether decision preferentially carries out the judgment processing to the adjacent networks transfer of which network kind.

Figure 11 is a concept map of showing the formation of mobile communication system among the embodiment 2.As shown in figure 11, mobile communication system 200 has possessed mobile radio station 11, base station B51, B52, base station B61～B63, mobile base station B71, B72 and has been made of them.As outdoor network, exist by outdoor base station B51, the outdoor network C 51 of each self-forming of B52, C52.As internal home network, there is internal home network C61～C63 by each self-forming of indoor base station B61～B63.

Mobile base station B71, B72 possess wireless device M71, the M72 that is used to connect external base station B51, B52, B61～B63 separately.Mobile base station B71, B72 have possessed wireless device W71, the W72 that is used to form mobile network C71, C72 separately in addition.In Figure 11, mobile radio station 11 and mobile base station B71 are in the scope of the outdoor network C 51 that forms by base station B51.

In the present embodiment, the imagination electric car is as mobile base station B71, B72, and imagination route R1, R2 are as circuit.Mobile base station B71 shifts on route R1, and mobile base station B72 shifts on route R2.Base station B51 is appended to the situation that exists as outdoor network C 52, internal home network C61, C62 and the mobile network C71 of adjacent networks in the expression information, and be each network of identification internal home network, outdoor network, mobile network which (kind of map network) can information (identifying information) notice mobile radio station 11.

Be base station B51 the expression network kind identifying information of self network C 51, identifying information that expression adjacent networks C52 is outdoor network, identifying information that expression adjacent networks C61, C62 are internal home network, identifying information that expression adjacent networks C71 is the mobile network as announcement information D1 notice mobile radio station 11.

Here said adjacent networks is not only the network that the part of network overlaps, and has also comprised the network that complete network overlaps.Promptly in Figure 11, in the adjacent networks of outdoor network C 51, be not only network C 52, C61, also comprised network C 62, C71.In addition, in the adjacent networks of internal home network C62, be not only network C 61, also comprised network C 51.

In addition, base station B51 is self network C 51 of expression which an identifying information notice mobile radio station 11 among internal home network, outdoor network, the mobile network, the identifying information of the network kind of relevant each adjacent networks C52 of expression, C61, C62, C71 can be used as the information that notice forms the base station of each network.

Next, describe the main composition key element mobile radio station of mobile communication system in the present embodiment in detail.Figure 12 shows that the function of mobile radio station 11 constitutes block diagram.As shown in figure 12, mobile radio station 11 has at least and detects channel screening part 12 (corresponding to screening plants), channel detection parts 13, announcement information receiving-member 14 (corresponding to judgment means), incoming level and obtain parts 15 (corresponding to acquisition device), jump condition alternative pack 16, transfer destination zone network alternative pack 17 (corresponding to choice device), network transitions parts 18.Has channel information memory unit 131 (corresponding to storage device) in channel detection parts 13 inside.

Announcement information receiving-member 14 receives the announcement information D1 of base station B51 of the network C in communication range 51 of self-forming mobile radio station 11 through radio channels and channel detection parts 13.In announcement information D1, according to the identifying information of the expression network kind of network C 51, in network C 51, comprised the identifying information of the expression network kind of adjacent networks C52, C61, C62, C71.Announcement information receiving-member 14 is judged each network of network kind based on these identifying informations.In addition, announcement information receiving-member 14 also can not rely on announcement information D1, based on prior canned data in channel information memory unit 131, judges the network kind of network C 51, C52, C61, C62, C71.

In the channel information memory unit 131 of channel detection parts 13, the relevant information of having stored a plurality of radio channels.Channel detection parts 13 detect channel according to canned data in the channel information memory unit 131.At this moment, in detecting screening part 12, the channel (detection channel) of the detected object that becomes incoming level is screened.Also can be with The selection result notification channel detection part 13.Thus, channel detection parts 13 can only detect one or be limited several channels of quantity.

Incoming level is obtained the incoming level that parts 15 detect each network C 51 of detecting by channel detection parts 13, C61, C62, C73.Thus, mobile radio station 11 is obtained the relevant incoming level of the all-network that oneself can shift.

The notice that jump condition alternative pack 16 is sent according to announcement information receiving-member 14 in communication range network C 51 and the network kind of adjacent networks C61, C62, C73 select jump condition, and the jump condition notice transfer destination zone network alternative pack of selecting 17.

Transfer destination zone network alternative pack 17 is selected only transfer destination zone network according to the incoming level of obtaining each network that parts 15 obtain by incoming level and the jump condition of selecting by jump condition alternative pack 16 for mobile radio station 11.Here in the selection of transfer destination zone network, comprised the judgement of whether suitable self of network transitions.Even under the situation of having selected the transfer destination zone network, the also unqualified transfer that must carry out to this network.

Figure 13 has showed example of the corresponding relation of network kind and network transitions condition in the present embodiment.In Figure 13, solid arrow E11～E33 represents from the jump condition of the network in communication range to adjacent networks.In addition, the starting point of arrow is illustrated in the kind of the network in the communication range, and the terminal point of arrow is represented the kind of adjacent networks.Jump condition E11～E33 is stored in the jump condition alternative pack 16, according to the notice of announcement information acceptance division 14 in communication range network and the kind of adjacent networks select.Selecteed jump condition notice transfer destination zone network alternative pack 17.

Figure 14 is detailed content, the selection relative importance value between each network kind and the presentation graphs of these corresponding relation of showing the jump condition of map network kind.As shown in figure 14, jump condition E11～E32 correspondence three kinds of jump conditions.Promptly set the condition of " when the incoming level of the network in communication range is lower than the critical value of regulation; in the adjacent networks of the incoming level that satisfies regulation, the highest adjacent networks of selective reception level is as the transfer destination zone network " as jump condition E21, E31, E32.In addition, set the condition of " difference of the incoming level of the network in communication range surpasses the highest adjacent networks of the hysteresis of regulation and selective reception level as the transfer destination zone network " as jump condition E11, E22.And then, set the condition of " irrelevant with the incoming level of network in communication range, the adjacent networks that the high state of selective reception level continues at the appointed time is as the transfer destination zone network " as jump condition E12, E13, E23.

In addition, in the jump condition of E33, set the condition of " not carrying out the network transitions between the mobile network ".These methods of the 1st or the 2nd by following explanation realize.The 1st method is to suppose in Figure 11 under the situation of mobile radio station 11 in the scope of mobile network C71, follow mobile network C72 in the scope of outdoor network C 51, to move, even mobile network C72 becomes the adjacent networks of mobile network C71, the wireless device W71 that forms mobile network C71 is not the method for notifying mobile radio station 11 as the C72 of adjacent networks.The 2nd method is that the mobile radio station 11 in the scope of mobile network C71 is not selected the method for network C 72 as the network of channel detection object.

Next, illustrate, can select to be suitable for most the reason of network of the communication of mobile radio station 11 by setting above-mentioned jump condition corresponding to the network kind.

(1) network in communication range is outdoor network, and adjacent networks is that under the situation of outdoor network jump condition E11 to be set at the reason of " the incoming level difference of the network in communication range surpass the hysteresis of regulation and the jump condition of the highest adjacent networks of incoming level as the transfer destination zone network " as described below.In this case, the network kind of the network in communication range, adjacent networks is identical, and the state of existing mobile communications system does not change.So, even in the present embodiment, as long as it is just passable to be useful in the existing mobile communications system widely used network transitions condition.It is the transfer destination zone network alternative pack 17 of mobile radio station 11, the incoming level difference of the outdoor network in communication range surpasses the hysteresis (for example 6dB) of regulation and in adjacent chamber's outer network, and the highest network of selective reception level is as the transfer destination zone network.

(2) network in communication range is outdoor network, adjacent networks is that jump condition E12 is that the reason of " irrelevant with the incoming level of network in communication range, the adjacent networks of the high state certain time of incoming level is as the jump condition of transfer destination zone network " is as follows under the situation of internal home network.Be that the output that relatively sends of the base station of the base station of internal home network and outdoor network is little, so the anticipation internal home network is littler than outdoor network of network radius.In addition, internal home network can reach communication at a high speed than outdoor network.So, irrelevant with the quality of outdoor network in communication range, if the quality of internal home network when setting is above, is transferred to internal home network and the words that communicate can be expected communication at a high speed.But the mobile radio station 11 that shifts in the scope of outdoor network even detect the high adjacent networks of incoming level, also will fully take into account situation about directly passing through from the scope of this adjacent networks.So, the transfer destination zone network alternative pack 17 of mobile radio station 11, the level difference of the internal home network adjacent with outdoor network in communication range is irrelevant, the high state of incoming level (for example signal compares more than 3dB interference noise electric power), (for example 5 seconds) lasting adjacent internal home network is selected as the transfer destination zone network at the appointed time.So, transfer to internal home network under the situation of 11 stop certain hours in the internal home network scope of mobile radio station, can prevent the frequent transfer between outdoor network and internal home network.Consequently can prevent to shift the interruption of the data transmission that causes, the reduction of data transfer rate by the high-frequency zone network.

(3) network in communication range is outdoor network, adjacent networks is that jump condition E13 is that the reason of " irrelevant with the incoming level of network in communication range, the adjacent networks of the high state certain time of incoming level is as the jump condition of transfer destination zone network " is as follows under mobile network's the situation.At first, mobile network's character is always not to be positioned at specific place.So, even the mobile radio station 11 in the scope of outdoor network or internal home network does not shift, the mobile network can fully take into account the incoming level instantaneous situation that become high state of mobile network than the network in communication range by from passing through near it.In addition, outdoor network at this moment and mobile network's level difference is according to the position of mobile radio station 11 and different.In addition, mobile radio station 11 is transferred to the proper state of conduct behind the mobile network, for example imagines people's (mobile radio station 11) electric cars such as platform (mobile network) AT STATION, wants the electric car in-track platform taken advantage of, and the people is multiplied by electric car etc.So, the transfer destination zone network alternative pack 17 of mobile radio station 11 is no matter outdoor network in communication range and adjacent mobile network's level difference, the high state of incoming level (for example signal compares more than 3dB interference noise electric power), (for example 10 seconds) lasting mobile network is selected as the transfer destination zone network at the appointed time.So, mobile radio station 11 begins to shift in the mobile network when the lasting stop stipulated time is above in the mobile network, can prevent near the just transfer to the mobile network from passing through the mobile radio station 11.Consequently can prevent to shift the interruption of the data transmission that causes, the reduction of data transfer rate by the high-frequency zone network.

(4) network in communication range is an internal home network, adjacent networks is that jump condition E21 is that the reason of " when the incoming level of the network in communication range is lower than setting, satisfying incoming level is the highest in the adjacent networks of incoming level of regulation the adjacent networks jump condition as the transfer destination zone network " is as follows under the situation of outdoor network.Be that internal home network is littler than outdoor network radius, indoor environment is lacked than the outdoor environment disturbing factor, so can guarantee good, stable communication quality in internal home network.So, the transfer destination zone network alternative pack 17 of mobile radio station 11 just under the incoming level of the internal home network in communication range is lower than the situation of critical value (for example signal is 3dB for disturbing noise electric power ratio) of regulation, satisfy in adjacent chamber's outer network of incoming level (for example signal is 5dB to interference noise electric power ratio) of regulation, the highest network of selective reception level is as the transfer destination zone network.So the jump condition E21 (network in communication range and adjacent networks all are the situations of internal home network) with following narration relatively sets jump condition by strictness, can prevent from the frequent transfer of internal home network to outdoor network.

(5) network in communication range is an internal home network, and adjacent networks is that the jump condition E22 under the situation of internal home network is that the reason of " the reception potential difference of the network in communication range surpasses the jump condition of the highest adjacent networks of the hysteresis of regulation and incoming level as the transfer destination zone network " is as follows.In this case, the network in communication range is identical with the network kind of adjacent networks, and existing mobile communications system is not switched.It is desirable to be applied in widely used network transitions condition in the existing mobile communications system.The transfer destination zone network alternative pack 17 that is mobile radio station 11 is chosen in the hysteresis (for example 6dB) of the incoming level difference of the internal home network in the communication range above regulation, and the highest network of incoming level is as the transfer destination zone network in the adjacent internal home network.

(6) network in communication range is an internal home network, jump condition E23 is that the reason of " irrelevant with the incoming level of network in communication range, the adjacent networks of the high state certain time of incoming level is as the jump condition of transfer destination zone network " is as follows under the mobile network's of adjacent networks the situation.At first, mobile network's character is can always not be positioned at the locality.So, even the mobile radio station 11 in the scope of outdoor network or internal home network does not shift, the mobile network can fully take into account the incoming level instantaneous situation that become high state of mobile network than the network in communication range by from passing through near it.In addition, internal home network at this moment and mobile network's level difference is according to the position of mobile radio station 11 and different.In addition, mobile radio station 11 is transferred to the proper state of conduct behind the mobile network, for example imagine AT STATION platform of people's (mobile radio station 11) (can not form under the situation of network for example as the subway platform by outdoor base station, platform becomes the network range of internal home network) etc. electric car (mobile network), want the electric car in-track platform taken advantage of, the people is multiplied by electric car etc.So, the transfer destination zone network alternative pack 17 of mobile radio station 11 is no matter outdoor network in communication range and adjacent mobile network's level difference, the high state of incoming level (for example signal compares more than 3dB interference noise electric power), (for example 10 seconds) lasting mobile network is selected as the transfer destination zone network at the appointed time.So, mobile radio station 11 begins to shift in the mobile network when the lasting stop stipulated time is above in the mobile network, can prevent near the just transfer to the mobile network from passing through the mobile radio station 11.Consequently can prevent to shift the interruption of the data transmission that causes, the reduction of data transfer rate by excessive high-frequency zone network.

(7) network in communication range is the mobile network, adjacent networks is under the situation of outdoor network, jump condition E31 is that the reason of " when the incoming level of the network in communication range was lower than the 1st critical value of regulation, the adjacent networks that incoming level is the highest in the adjacent networks of the incoming level of satisfied regulation was as the jump condition of transfer destination zone network " is as follows.At first, mobile network's character is can always not be positioned at the locality.For this reason, the mobile network is by shifting, and the incoming level from the signal of adjacent networks that the mobile radio station 11 in the mobile network receives is at every moment changing.In addition, the state of mobile radio station 11 high-speed mobile in the mobile network in the mobile network is difficult to the imagination in reality, the incoming level of the signal of the network in the next comfortable communication range that the mobile radio station 11 in the imagination mobile network receives is almost constant, so, mobile radio station 11 in the mobile network is in the moment of carrying out network transitions, it is desirable to the moment of the incoming level deterioration of the mobile network in communication range, when promptly outside the mobile network, shifting in the mobile network when electric car is got on or off the bus (for example from etc.).So, only the incoming level of the mobile network in communication range is lower than under the situation of critical value (for example signal is 3dB for disturbing noise electric power ratio) of regulation, and the transfer destination zone network alternative pack 17 of mobile radio station 11 selects to satisfy incoming level is the highest in adjacent chamber's outer network of incoming level (for example signal is 5dB to interference noise electric power ratio) of regulation network as the transfer destination zone network.So, the mobile network is when mobile, even adjacent chamber's outer network under the situation of the incoming level timeliness ground variation of the signal of internal home network, can prevent also that the interior mobile radio station 11 of mobile network is to adjacent network transitions.

(8) network in communication range is the mobile network, adjacent networks is under the situation of internal home network, jump condition E32 is that the reason of " when the incoming level of the network in communication range was lower than the 1st critical value of regulation, the adjacent networks that incoming level is the highest in the adjacent networks of the incoming level of satisfied regulation was as the jump condition of transfer destination zone network " is as follows.At first, mobile network's character is can always not be positioned at the locality.For this reason, the mobile network is by shifting, and the incoming level from the signal of adjacent networks that the mobile radio station 11 in the mobile network receives is at every moment changing.In addition, the state of mobile radio station 11 high-speed mobile in the mobile network in the mobile network is difficult to the imagination in reality, the incoming level of the signal of the network in the next comfortable communication range that the mobile radio station 11 in the imagination mobile network receives is almost constant, so, mobile radio station 11 in the mobile network is in the moment of carrying out network transitions, it is desirable to the moment of the incoming level deterioration of the mobile network in communication range, when promptly outside the mobile network, shifting in the mobile network when electric car is got on or off the bus (for example from etc.).So, only the incoming level of the mobile network in communication range is lower than under the situation of critical value (for example signal is 3dB to interference noise electric power ratio) of regulation, and the transfer destination zone network alternative pack 17 of mobile radio station 11 selects to satisfy incoming level is the highest in adjacent chamber's outer network of incoming level (for example signal is 5dB to interference noise electric power ratio) of regulation network as the transfer destination zone network.So, the mobile network is when mobile, even adjacent chamber's outer network under the situation of the incoming level timeliness ground variation of the signal of internal home network, can prevent also that the interior mobile radio station 11 of mobile network is to adjacent network transitions.

(9) network in communication range is the mobile network, and adjacent networks is under mobile network's the situation, and jump condition E33 is that the reason of " not carrying out the network transitions between the mobile network " is as follows.The setting reason of jump condition E33 is as follows.Shift the such situation of mobile radio station 11 (people) from mobile network's (electric car) to other mobile network (electric car), for example the situation that the people changes to electric car takes place in platform AT STATION.But, because it is unimaginable to shift the such situation of mobile radio station 11 between the mobile network who misses, so do not wish the incoming level difference between the mobile network is carried out network transitions as benchmark.So, as mentioned above, under these circumstances, do not carry out the transfer between the mobile network.Not the mobile radio station 11 of notifying the mobile network as other mobile network's information of adjacent networks.Perhaps the mobile radio station in mobile network's scope 11 not other mobile network as the channel detection object.Can realize by above-mentioned a certain method.

And then with reference to Figure 14, it is all different that each adjacent networks carries out the relative importance value of order of network transitions judgment processing.If according to Figure 14, for example the network in communication range is under the situation of outdoor network, and at first to carry out relative importance value be 1 judging to the transfer of internal home network to mobile radio station 11.Consequently, when by judging to the transfer of internal home network under the non-existent situation of the network that becomes candidate, mobile radio station 11 is carried out the transfer judgment processing to the mobile network of 2 of relative importance values.And then, when judging, mobile network's transfer becomes under the also non-existent situation of network of candidate, and mobile radio station 11 is carried out the transfer judgment processing to adjacent chamber's outer network as last transfer judgment processing.Even the network in communication range is under the situation of internal home network, also to carries out the transfer of the network of identical priority and judge.

As previously discussed, concerning mobile communication system 200 in embodiment 2, mobile radio station 11 suitably changes the jump condition of network corresponding to the kind of network in communication range and adjacent networks.Suitably change the relative importance value of the adjacent networks of transfer destination zone network corresponding to the kind of the network in communication range.So, mobile radio station 11 can select to be suitable for most self the network of communication as the transfer destination zone network.

The state of putting down in writing in the present embodiment, the particularly corresponding relation of network kind and jump condition and relative importance value relate to a desirable example of mobile communication system of the present invention in addition.The present invention is not limited only to above-mentioned state.

For example, the foregoing description 2, imagination is used identical communication in all networks, relate to network selecting technology of the present invention, also can be suitable under the situation according to the different communication of network use.Promptly relate to network selecting technology of the present invention, use communication P (for example CDMA) time to be used among outdoor network C 51, C52 and internal home network C61, C62, the C63, also can be used when using communication Q (for example OFDM) among mobile network C71, the C72.

Below referring again to Figure 11 and Figure 12 distinctive processing in these states is described.

On the basis of the information that base station B51, outdoor network C 52, internal home network C61, C62 and mobile network C71 exist as adjacent networks, be the communication that to discern information (identifying information) that each network is internal home network, outdoor network or mobile network (a network kind correspondence), show use and so on that the information (physical layer information) of relevant physical layer sends to mobile radio station 11.

Being base station B51 represents identifying information to the network kind of self network C 51, adjacent networks C52 is the expression identifying information of outdoor network, adjacent networks C61, C62 is the expression identifying information of internal home network, adjacent networks C71 is mobile network's an expression identifying information, adjacent networks C52, C61, the communication that C62 uses is the expression physical layer information of communication P, it is the expression physical layer information arrangement of communication Q and as announcement information D1 notice mobile radio station 11 that adjacent networks C71 uses communication.

Mobile radio station 11 is by resolving the announcement information D1 in the announcement information receiving-member 14, the communication of grasping adjacent networks C52, C61, C62 use is that communication P, adjacent networks C71 use communication is communication Q, these notification channel detection parts 13 and jump condition alternative pack 16.Channel detection parts 13 use communication P to detect adjacent networks C52, C61, C62, use communication Q to detect adjacent networks C31.

Jump condition alternative pack 16 considers that outdoor network C 52 and internal home network C61, C62 use communication P, adjacent networks C71 to use communication Q, select only network transitions condition by above-mentioned step from network transitions condition E11～E33 on the other hand.So, use corresponding to the network kind under the situation of different wireless communication mode, the network that mobile radio station 11 can be selected to be suitable for communicating by letter most is as the transfer destination zone network.

Here as internal home network, can be applicable to the network that forms handie-talkie.In addition, form the network of handie-talkie, the micronetization of the 4th generation technique, WLAN, home network, follow multipleization and the form a social stratum of the networks such as network between effective type wireless terminal, can predict situation about increasing from now on.Follow these, estimate that internal home network can increase.But even in this case, mobile radio station 11 is not obtained all network incoming levels, obtains the incoming level that is judged as necessary network by detecting 12 of channel screening parts, can carry out effective network selection thus and handle.

Above-mentioned reality is stated example 2 can take following variation.Promptly change condition E13, E23, E31, E32 and can be " change of each unit interval of the incoming level of the network in communication range surpasses under the situation of setting; and the incoming level of adjacent networks is selected the jump condition of adjacent networks as the transfer destination zone network under the situation more than the setting ".

Below in such example, illustrate that jump condition E13, E23, E31, E32 become the reason of above-mentioned jump condition.

For example the user of mobile radio station is multiplied by electric car from the platform (internal home network and outdoor network) at station, and after electric car began to move, the internal home network in communication range of mobile radio station or the incoming level of outdoor network changed tempestuously.To this, the user the incoming level anticipation of the network (this adjacent networks constantly is the mobile network) that constitutes in by trolley-bus be stabilized in setting.So, as mobile radio station from internal home network or outdoor network to the opportunity that the mobile network shifts, when the incoming level of the network in communication range began acutely to change, it is the most suitable that the electric car of promptly taking begins when mobile.

In addition, after mobile radio station is transferred to outside the mobile network in the mobile network (for example user when this electric car begins to move once more after the platform at station under the electric car etc.), the incoming level of mobile network in communication range acutely changes, and the get off incoming level of network (this constantly adjacent networks be internal home network and outdoor network) of station platform at place of user is contemplated for more stable.So, as mobile radio station from the mobile network to the opportunity that internal home network or outdoor network shift, be incoming level in communication range when beginning acutely to change, it is the most suitable that the electric car of promptly getting off begins moment of moving once more.

Claims (13)

1. mobile radio station is characterized in that comprising:

Obtain the acquisition device of the incoming level of network in communication range and the network adjacent with it;

Judge above-mentioned in communication range network and the judgment means of above-mentioned adjacent network of network kind; And

According to above-mentioned incoming level of obtaining by above-mentioned acquisition device and the above-mentioned network kind judged by above-mentioned judgment means, select the choice device of transfer destination zone network.

2. according to the mobile radio station of claim 1 record, it is characterized in that:

Above-mentioned choice device changes the jump condition of network corresponding to the above-mentioned network of network kind of judging by above-mentioned judgment means in communication range.

3. according to the mobile radio station of claim 2 record, it is characterized in that:

Above-mentioned choice device changes the jump condition of network corresponding to the network kind of the above-mentioned adjacent networks of judging by above-mentioned judgment means.

4. according to the mobile radio station of claim 1 record, it is characterized in that:

The storage device that above-mentioned network kind and network-level are stored accordingly;

Count the counting device of the transfer number between the different network of above-mentioned network-level; And

When the above-mentioned transfer number by above-mentioned counting device counting has surpassed under the situation of setting, switch in the switching device shifter of the corresponding relation of above-mentioned network kind in the above-mentioned storage device and above-mentioned network-level.

5. according to the mobile radio station of claim 1 record, it is characterized in that:

And then possess the screening plant that screening obtains the adjacent networks of incoming level, wherein

Above-mentioned acquisition device is obtained the incoming level by the adjacent networks of above-mentioned screening plant screening.

6. according to the mobile radio station of claim 5 record, it is characterized in that:

The jump condition of above-mentioned network comprises in the following jump condition at least:

When the incoming level of the network in communication range is lower than the 1st critical value of regulation, in the adjacent networks of the incoming level that satisfies regulation, the jump condition of the highest adjacent networks of incoming level as the transfer destination zone network;

Difference with the incoming level of network in communication range is surpassed the hysteresis of regulation, and the highest adjacent networks of incoming level is as the jump condition of transfer destination zone network;

Irrelevant with the incoming level of network in communication range, the jump condition of the adjacent networks of the high state continuance certain hour of incoming level as the transfer destination zone network;

When the change of the unit interval of the incoming level of the network in communication range has surpassed the 2nd critical value of regulation, in incoming level surpasses the adjacent networks of the 3rd critical value of regulation, the jump condition of the highest adjacent networks of incoming level as the transfer destination zone network.

7. mobile communication system is characterized in that comprising:

Have the incoming level of the network obtained in communication range and the network adjacent with it acquisition device,

Judge above-mentioned in communication range network and the judgment means of the network kind of above-mentioned adjacent networks,

According to above-mentioned incoming level of obtaining by above-mentioned acquisition device and the above-mentioned network kind judged by above-mentioned judgment means, select the mobile radio station of the choice device of transfer destination zone network;

Can the network of identification own or the network kinds of information of network own and adjacent networks thereof notify the base station of above-mentioned mobile radio station.

8. network selecting method is characterized in that comprising:

The acquisition device of mobile radio station obtain network in communication range and adjacent networks thereof incoming level obtain step;

The judgment means of above-mentioned mobile radio station judge above-mentioned in communication range network and the determining step of the network kind of above-mentioned adjacent networks; And

The choice device of above-mentioned mobile radio station is selected the selection step of transfer destination zone network according to the above-mentioned incoming level of obtaining by above-mentioned acquisition device, by the above-mentioned network kind that above-mentioned judgment means is judged.

According to Claim 8 the record network selecting method, it is characterized in that comprising:

The counting step of the transfer number between the different network of counting device counting and network rank;

Switching device shifter surpasses under the situation of setting at the above-mentioned transfer number by above-mentioned counting device counting, switches in the switch step of the corresponding relation of above-mentioned network kind in the storage device and above-mentioned network-level.

10. according to the network selecting method of claim 9 record, it is characterized in that:

In above-mentioned switch step, above-mentioned switching device shifter above-mentioned transfer number in the stipulated time that the counting from above-mentioned transfer number begins the zero hour has surpassed under the situation of setting, switches the above-mentioned network kind in the above-mentioned storage device and the corresponding relation of above-mentioned network-level.

11. the network selecting method according to claim 9 record is characterized in that:

In above-mentioned switch step, above-mentioned switching device shifter is beginning from this switching instant through after the stipulated time under the situation of the corresponding relation that has switched above-mentioned network kind and above-mentioned network-level, makes above-mentioned corresponding relation turn back to switching corresponding relation in the past.

12. a network selecting method is characterized in that comprising:

The storing step of the information of the relevant radio channel of memory device stores of mobile radio station;

The screening plant screening of above-mentioned mobile radio station obtains the screening step of the adjacent networks of incoming level;

In the network and the network adjacent of the acquisition device of above-mentioned mobile radio station in communication range with it, obtain the adjacent networks by above-mentioned screening plant screening incoming level obtain step;

The judgment means of above-mentioned mobile radio station judge above-mentioned in communication range network and the determining step of the network kind of above-mentioned screened adjacent networks; And

The choice device of above-mentioned mobile radio station is selected the selection step of transfer destination zone network according to the above-mentioned incoming level of obtaining by above-mentioned acquisition device, by the above-mentioned network kind that above-mentioned judgment means is judged.

13. the network selecting method according to claim 12 record is characterized in that:

The jump condition of above-mentioned network comprises in the following jump condition at least:

When the incoming level of the network in communication range is lower than the 1st critical value of regulation, in the adjacent networks of the incoming level that satisfies regulation, the jump condition of the highest adjacent networks of incoming level as the transfer destination zone network;

Difference with the incoming level of network in communication range is surpassed the hysteresis of regulation, and the highest adjacent networks of incoming level is as the jump condition of transfer destination zone network;

Irrelevant with the incoming level of network in communication range, the jump condition of the adjacent networks of the high state continuance certain hour of incoming level as the transfer destination zone network;

When the change of the unit interval of the incoming level of the network in communication range has surpassed the 2nd critical value of regulation, in incoming level surpasses the adjacent networks of the 3rd critical value of regulation, the jump condition of the highest adjacent networks of incoming level as the transfer destination zone network.

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