CN1934534A - Universal telecommunication node with software-defined exchangeable protocol architecture - Google Patents

Abstract

The invention proposes a network node comprising modules (1, 2, 3, 4, 6; 7) including transport functions in order to support a particular network transport protocol, wherein the transport functions are realized by software. The invention also proposes a method for operating the network node. Different network transport protocols are supported with the same hardware by installing corresponding software.

Description

Universal telecommunication node with exchangeable protocol architecture of software definition

Technical field

The present invention relates to network node and the method that is used for the operational network node, wherein this network node comprises at least one module.

Background technology

Especially, the present invention relates to comprise that at least one carries out the network node of the module of transfer function.The example that can use the network of this network node therein is WCDMA (Wideband Code Division Multiple Access (WCDMA)) Radio Access Network.Another example of this network is the CDMA2000 network.

Third generation partner program (3GPP, R99, R4 and R5 distribution version) has been specified WCDMA Radio Access Network (RAN).

Fig. 1 illustrates wideband CDMA Radio Access Network and its interface.It shows general structure and the context of WCDMARAN.Especially, WCDMA RAN comprises a plurality of base stations (BTS) and radio network controller (RNC).Wcdma core network (CN) comprises, for example, and mobile switching centre (MSC) and service GPRS (wireless universal grouping system) support node (SGSN).

External interface is Iu and Uu, and Iu is the interface to wcdma core network.Uu is to subscriber equipment (UE) " air interface ", and wherein subscriber equipment (UE) is the mobile phone of band UMTS (universal mobile telecommunications service) SIM (client identification module) card.This internal interface is defined in Iub between RNC and the BTS and the Iur between RNC.

The 3GPP protocol architecture is based on the separate in logic principle of layer and plane.If desired, can when remaining intact, other parts change the some parts of this protocol architecture in the future.This protocol architecture comprises two main flat seams, higher wireless network layer (RNL) and lower transport network layer (TNL).All problems that are related to WCDMA RAN only as seen at this wireless network layer, and this transport network layer is represented the transmission technology of standard, selects transport network layer to be used for WCDMA RAN but does not aim at WCDMA RAN and change.

Originally, asynchronous transfer mode is used as host-host protocol on Iub and RNC, and wherein the interface and the RNC that are between the BTS (being also referred to as ' Node B ') of Iub also is called Iub/ATM more.

The protocol stack of this Iub/ATM interface has been shown among Fig. 2.Especially, Fig. 2 has described this protocol stack that is used for this Iub interface under the situation of ATM transmission network.Show two flat seam RNL and TNL.From the viewpoint of TNL, RNL control plane (NBAP (node B application part)) and RNL user plane (that is, transmitting the Frame Protocol of DCH (dedicated channel)), RACH (Random Access Channel), FACH data such as (forward access channels) are TNL user data.AAL2 (atm adaptation layer 2) signaling (Q.2630.1) is used to control the TNL based on ATM, promptly sets up with release AAL2 according to the needs of this RNL to be connected.As shown in Figure 2, transmit this signaling by signaling propagation and transformation device (STC), SSCOP and AAL5 on SSCOP (service-oriented special-purpose connection protocol).

In addition, 3GPP R5 distribution version has also specified procotol (IP) as the optional host-host protocol that can be used for substituting ATM.Thereby the interface between this BTS and the RNC is called Iub/IP.

Fig. 3 shows the protocol stack of this Iub/IP interface under the situation of IP transmission network.For RNL, this is the same with the ATM transmission in itself.Here, IPC (IP control) signaling is used to control IP-based TNL.

3GPP has also considered IP, because general supposition is to use IP can finish the cost savings (OPEX (operation property expenditure) and CAPEX (capital expenditure)) of essence in the future.

Typical B TS architecture shows as Iub is divided into RNL and TNL layer: have transmission block (TB) and can further be subdivided into baseband block (BB) and the wireless network layer piece of radio frequency piece (RFB).Use the realization of considering meticulously, when host-host protocol is become IP by ATM, only need to exchange TB.

At the hub station of having gathered, disposed the standard telecommunication node usually from the traffic of several BTS.Under the situation of ATM, have ATM cross connection or switch, and under the situation of IP, ip router is arranged.Usually, the ATM node can not be become ip router, that is, if mobile operator finally wishes hub point is become the IP transmission from ATM, he will have to IP hardware replacement ATM hardware.Therefore, current, ATM switch or cross connection still are ATM switch or cross connection, and ip router also still is an ip router.Its reason behind is only to support a kind of custom-designed hardware of transport protocol option (being generally special IC (ASIC)).

In typical WCDMA RAN, several thousand base stations have been disposed.If this Iub/IP option becomes attractive in the future economically, mobile operator may wish some or all base stations among this WCDMARAN are become Iub/IP from Iub/ATM so.Usually, also have and have the ATM cross connection that to replace by ip router or the hub station of ATM switch.When needs change main hardware, this very expensive to the transplanting general of Iub/IP from Iub/ATM.

Summary of the invention

Therefore, the objective of the invention is to allow to change the host-host protocol that is used for network node with low-cost and minimum maintenance work.

This purpose realizes that by network node this network node comprises at least one module, and this module comprises that transfer function is to support particular network transport protocol.

Alternatively, realize this purpose by the method that is used for the operational network node, wherein, this network node comprises at least one module, this module comprises transfer function to support particular network transport protocol, and this method comprises by using software to carry out the step of this transfer function.

The present invention has also proposed to be used for the computer program of computing machine, and this computer program comprises the attainable instruction of processor of the step that is used to carry out said method.

Therefore, according to the present invention, this transfer function is realized by software.Therefore, if necessary, this software can upgrade at an easy rate, to such an extent as to can handle another host-host protocol (for example, ATM or IP).

Therefore, the exchange of unnecessary hardware makes to be the desired cost of change and the maintenance work minimum of host-host protocol.

Further useful being deployed in the independent claims listed.

Description of drawings

Below following by reference accompanying drawing is described the present invention, and accompanying drawing comprises:

Fig. 1 shows broadband WCDMA Radio Access Network and interface thereof,

Fig. 2 shows the protocol stack of Iub/ATM interface,

Fig. 3 shows the agreement of Iub/IP interface,

Fig. 4 shows according to a first advantageous embodiment of the invention, by the transmission block of the exchangeable protocol architecture of software definition,

Fig. 5 shows according to the first embodiment of the present invention, the transmission block that customizes for ATM by the commutative transport protocol architecture of software definition,

Fig. 6 shows according to the first embodiment of the present invention, the transmission block that customizes for IP by the commutative transport protocol architecture of software definition, and

Fig. 7 shows single module transmission block according to a second, preferred embodiment of the present invention.

Embodiment

Below, preferred embodiment of the present invention is described.

Under its general form, be to support particular network transport protocol, comprise the module that at least one comprises transfer function according to the network node of current embodiment of the present invention, wherein, this transfer function is realized by software.

That is, this transfer function is realized by software according to the present invention, and the remainder of this module is realized by hardware.Yet, be not limited to above-mentioned situation, and the part of the remainder of this module (special, for example, control function) also can realize by software.

The example of this module can specifically provide the interface module that external network is connected.Another example is a central module, and for example, its transfer function provides the connection to the higher level of this network node.

According to the of the present invention concrete example that describes below, by with reference to figure 4, as hereinafter described, network node is the base station, and this base station comprises transmission block, baseband block and radio frequency piece.

This base station can support ATM and IP transmission (3GPP Iub/ATM or Iub/IP) the two.Be to use ATM also to be to use IP, only this embedded software by this transmission block determines, rather than by any hardware decision.This allows mobile operator to change by remote software, upgrades to IP from ATM online, and does not need very expensive site access and hardware replacement.

Identical idea also can be applied to independent ATM node (for example, disposing at the hub station).That is, by upgrading this software, this independent ATM node can be converted into ip router by remote software.

Further, by customizing this embedded software, the seller of communication facilities (for example, base station, ATM node or ip router) can use identical hardware platform for ATM and IP transmission solution.

Fig. 4 shows the transmission block by the commutative transport protocol architecture of software definition.Especially, Fig. 4 shows the universal model of the base station of being made up of transmission block (TB), baseband block (BB) and radio frequency piece (RFB).This transmission block of more detailed description.As example, show four interface modules that have different physical interface type.First interface module is represented with reference marker 1, and Ethernet interface is provided.Second interface module 2 provides PDH (PDH) interface.The 3rd interface module 3 provides SDH/SONET (Synchronous Digital Hierarchy/Synchronous Optical Network) interface, and the 4th interface module 4 provides Frame Relay Interface.These interface modules handle lower transport functions are illustrated by the piece 11,21,31 and 41 of the interface module 1 to 4 of correspondence.By software, they are exclusively used in specific host-host protocol (for example, ATM or IP).

Realized by the higher transport shown in the piece of reference marker 62 expressions by the central module (middle part at this transmission block illustrates) of reference marker 6 expressions, and by this interworking between transmission and baseband block shown in the piece 61.Transport layer that this is higher and interworking function are also realized by software; Thereby they can be suitable for the special requirement of this employed host-host protocol.All transmission block modules (interface module 1 to 4 and central module 6) connect by the Ethernet switch 5 here.Yet this is at this current embodiment: other may proprietary transmission node one inner method of attachment also be feasible.That is, for this switch, the node-internal network generator of some other kinds also can use, and the another kind of node-internal network host-host protocol that substitutes Ethernet also can be used.

Therefore, as shown in Figure 4, TB comprises by some interface modules central module as a supplement.This interface module has realized than low transmission layer (for example, ATM layer or IP data link layer), and physical layer function (for example, PDH and SDH/SONET), and central module is realized higher transport layer functionality (for example, AAL2/AAL5 or IP route).Further, according to current embodiment, this central module 6 has also been realized the essential interworking function between this TB and BB piece.According to current embodiment, point-to-point VLAN (VLAN) Ethernet is used for this interface module is connected to this central module as the general transmission mechanism of this TB inside.

All low and higher transport layer functionality (by certainly 11,21,31,41 and 62 illustrating) and interworking functions (being illustrated by piece 61) are realized on programmable high-performance treatments engine by software, make whole transport layer and this interworking function to exchange by new software is installed.

Below, Fig. 5 and 6 by reference is configured to be used for the situation that ATM and this transmission block are configured to be used for IP for this transmission block, has described above-mentioned architecture.

Fig. 5 shows the transmission block by the commutative transport protocol architecture of software definition into ATM customization.That is, Fig. 5 shows the customization according to the current embodiment layout that is used for Iub/ATM shown in Figure 4.

Standard A TM as CLP=1 label, OAM and the processing of RM cell etc. of checking traffic contract consistance, non-compatible cell handles, and finishes on this interface module.And the also operation A TM cross connection of this interface module.AAL2 and AAL5 handle at this central module.These all do not have to describe in detail at this, because it is irrelevant with the present invention.Depend on this specific implementation, other piecemeals of this atm feature also are feasible.Relevant functional of all ATM realizes by software.According to current embodiment, suppose this interface between TB and BB based on the IP agreement, so, interworking function is provided, it makes the outside ATM field of this transmission network be suitable for the IP field, inside of this base station.This interworking function is also realized by software in this TB.

In the left side of this transmission block, show the ATM cross connection that provides by this interface module 1 and 2.In order to realize RAN with chain type or star topology, this ATM PVC (permanent virtual circuit) can carry the traffic from other base stations.This traffic this TB that only flows through, and invisible for this BB and RFB.

At length, in this example, interface module 1 receives and comprises the ATM cell of VPI_in (input virtual path identifier) (being 08 in this example) and VCI_in (input Virtual channe identifiers) (being 15 in this example), and comprises this cell payload (Cell PL).The ATM layer function 11 of this interface module 1 encapsulates the ethernet frame of these ATM cell with band Ethernet head.In addition, be provided with VPI_out (output virtual path identifier) (being 47 in this example), and be provided with VCI_out (output Virtual channe identifiers) (being 11 in this example).This Ethernet switch 5 is forwarded to these ethernet frames by the interface module 2 of PDH interface with its transmission.

On the right side of Fig. 5, show the flow of end.The ATM cell that is received by interface module (in this example, by interface module 4) is forwarded to the central module 6 that this execution AAL handled also thereby re-assemblied this RNL frame.That is, in Fig. 4 by this higher transport shown in the piece 62 at this by the AAL functional representation.This RNL frame further is encapsulated as the IP grouping by this (according to this current embodiment) with this frame and this IP is forwarded a packet to interworking function 61 processing of BB.After Base-Band Processing, this frame is transmitted to RFB and sends to transfer table by air interface.Other directions are similarly (from these transfer tables to this RAN), but do not have shown here.

Therefore, as shown in Figure 5 and above-mentioned, as example, this Iub/ATM transmission option can be loaded into this TB.This interface module will obtain making them can receive and send the software of ATM cell with some physical frame structure then.This interface module can be encapsulated into ethernet frame with ATM cell, so that transmit this cell to another interface module (being used for the ATM cross connection) or to this central module (being used to end at the traffic of this base station).This central module is realized the AAL function, so that re-assembly the wireless network layer frame that will be forwarded to (and cutting apart in the other direction) this BB.Then, this interworking function is adapted for these frames by the desired form of inside of base station interface between TB and the BB.According to this current embodiment, this interface can be based on IP and Ethernet.In the case, the RNL frame is mapped as UDP message or TCP stream.

Fig. 6 shows the baseband block by the commutative transport protocol architecture of software definition that customizes for IP.That is, Fig. 6 shows the customization of the layout of describing among Fig. 4 that is used for Iub/IP.On this interface module, finish standard I P data link layer deals.On this central module, finish the IP route.Since irrelevant with the present invention, detailed description do not had here.According to this specific implementation, functional other piecemeals of this IP also are feasible.All relevant functional of IP realizes by software.Here, the interface of our hypothesis between TB and BB is based on the IP agreement, and like this, we only need empty interworking function.

In the left side, show the flow (for example) of route, and, show the IP flow of end on the right side from the traffic of other base stations.

At length, IP grouping arrives interface module 1, and current lower transport functions 11 with the software that is used to carry out the IP data link layer functions, and the IP packet encapsulation that this is received is an ethernet frame.That is, this ethernet frame comprises Ethernet head, IP head, UDP (User Datagram Protoco (UDP)) head, RNL (wireless network layer) head and CRC (cyclic redundancy check (CRC) and).Transmit these Ethernet groupings by Ethernet switch 5 to the current higher transport 62 of the central module 6 of the software that is used for the IP routing function that comprises.That is, in this example, carry out this route by this central module.Then, via this Ethernet switch 5, transmit this grouping to this interface module 2.Thereby this IP data link layer functions is converted to another layer 2 encapsulation that are applicable to external network with the Ethernet encapsulation of this IP grouping, and this external network is for example to be connected to another base station.

In the example of the traffic that finishes, it is the IP grouping of destination that interface module 4 receives with the radio frequency piece.Similar in the situation of the traffic of this above-mentioned route that coexists, this IP data link layer functions 41 is an ethernet frame with received IP packet encapsulation.These ethernet frames are forwarded to Ethernet switch 5, and this Ethernet switch 5 is forwarded to the IP routing function 62 of central module with it.This IP routing function is IP grouping (perhaps being applicable to the grouping of the another kind of agreement of radio frequency piece) with this ethernet frame conversion (for example, extracting), and they are forwarded to the transmission/base band interworking function 61 of this central module.

Thereby according to the layout shown in Fig. 6, this Iub/IP transmission option is loaded into TB.Then, interface module will obtain allowing them to receive and send the software of IP grouping with some physical frame formats.This interface module can be an ethernet frame so that transmit this grouping to central module with the IP packet encapsulation.This central module is realized the IP routing function, and determines that this IP grouping should further be routed to this IP network, or this IP grouping belongs to the communication stream that ends at this base station.If this IP grouping should be routed, then send it to interface module; If this IP grouping belongs to the stream of end, then it is forwarded to interworking function.Then, this interworking function is adapted for the RNL frame that comprises in this IP grouping the form that can be accepted by this inside of base station interface between TB and BB.According to this current embodiment, as whole RAN, this interface also can be based on IP.In such cases, this interworking function will become an empty function, and this TB is an ip router.

Therefore, according to this current embodiment,, can easily between IP and ATM, change the host-host protocol that is used for this TB by changing this software low and higher transport.Do not need switching hardware.

Therefore, according to this current embodiment, whereabouts and be converted into the form that is suitable for switch 5 from the traffic of transmission block outside.That is, work in the ethernet frame that to control by this switch 5 at inner this transmission block.The all-pass that converts between this ethernet frame and this external network protocols (for example, IP or ATM) is crossed software processes in this lower transport functions 11,21,31 and 41.Equally, for example, the higher transport 62 of central module will be converted to the agreement of the higher functions that is suitable for transmission block by the traffic that switch 5 receives, and vice versa.Therefore, the inside Ethernet structure of node has formed basis general and that need not change, thereon, and can be only by providing appropriate software to realize some kinds of outside visible procotols such as ATM and IP.

Operator initiate from Iub/ATM under the situation of the change of Iub/IP, this operator will use the normal housekeeping function as the TB of Remote configuration management and software download, the new software package of download in TB.If the seller of base station wishes to be ATM and the identical hardware platform of IP transmission use, they can be by installing appropriate embedded software customization universal nodes platform in product.

Can upgrade the feasible maintenance that does not need at the scene by the network executive software.For this reason, can provide one with the software loading device of new software loading to the special use of corresponding interface module and central module.

Software can be sent with the software package that comprises the software binary mode that is applicable to each module type.Use the software management capability of node and network management system, can software package be downloaded to node by the telemanagement connection.The software management capability of this node next can this is involved the software binary mode be distributed to corresponding module.The newly-installed configuration file that comprises the requirement of this node together with this software package, can together be downloaded.After the finishing of this download success, this network management system can activate this new software package.After remotely receiving this activation command, next this node can for example begin this new software by restarting with new binary mode.After activating, application definition this setting in this configuration file automatically of this node.Be used in the correct setting in this configuration file, this node (may operate as the ATM cross connection before it) can be carried out its new role (for example, ip router) immediately.

Therefore, according to this current embodiment, mobile operator can need not change hardware with the pure software download and change this transmission network into IP by ATM.Telecommunications equipment vendors can be for being used for ATM and IP transmission block and the identical hardware platform of independent transmission node.This has increased maintainability, because repair-deficiency does not need redesign and replaces the host-host protocol special IC, and only wants new software publishing version.New feature can easily correct.

According to the first above-mentioned embodiment, the architecture of the interface module that comprises central module and add has been described.But in architecture, whole functional all being positioned at also are feasible on the single module.

Below, in Fig. 7,, single module transmission block 7 has been described according to second embodiment.This single module comprises all by the transmission/base band interworking function 71 of software definition, higher transport 72 (for example, AAL handles, IP route), lower transport functions 73 (for example, ATM layer, IP data link layer).

Therefore, according to this transmission block of this second embodiment not needs according to the switch of this first embodiment.

Sum up,, provide in order to overcome when realization and the mechanism (software upgrading) that on the Iub interface in WCDMA RAN this host-host protocol need be replaced the problem of hardware when ATM changes into the IP host-host protocol according to this invention.BTS hardware can be supported ATM and IP host-host protocol (for example, by using network processing unit or FPGA (field programmable gate array)) flexibly.Be to use ATM also to be to use IP, only determine, but not determine by any hardware by the embedded software of this transmission block.Allow mobile operator to change by remote software at the scene like this this BTS is upgraded to IP from ATM, and do not need very expensive site access and hardware replacement.

Therefore, for foregoing invention, three main application are arranged:

1. the transmission block of this in the base station upgrades to Iub/IP by software download from Iub/ATM by this mobile operator.

When 3G network when Iub/ATM upgrades to Iub/IP, independent ATM cross connection/switch is installed in the 3G network and need changes into ip router.This can also be downloaded by SW by mobile operator and finish.

3. except these move application: the general HW platform of useful as ATM cross connection/switch or ip router depends on this burned firmware.The seller will determine it is this HW to be paid be ATM cross connection/switch, or ip router, and the client will never change it.This is favourable for the seller (optional to the client), because identical HW platform can be used for different products.

Yet, should note the invention is not restricted to these application.

Foregoing and accompanying drawing only show the present invention by way of example.Therefore, this embodiment can change in the scope of appending claims.

For example, according to this above-mentioned embodiment, this network node is the base station.Yet, the invention is not restricted to this.According to this network node of the present invention, can be any suitable network element that transfer function is provided therein or unit antithesis.For example, this network node for example can comprise independent ATM cross connection or the switch at place, hub station needs.Further, this network node can comprise ip router.

That is, if this hardware is to design according to top description, this ATM cross connection or switch can be converted to ip router by the remote software change.

In addition, above-mentioned this embodiment is devoted to Radio Access Network.Yet the present invention also can be applied to dispose the whole telecommunications or the data network of ATM node or ip router.

Further, this invention is not limited to ATM or IP.Antithesis, use appropriate software, nearly all rational transport protocol stack can be realized by identical hardware platform.

Claims (35)

1. network node comprises:

At least one module (1,2,3,4,6; 7), comprise transfer function with the support particular network transport protocol,

Wherein, described transfer function is realized by software.

2. according to the described network node of claim 1, wherein said network node comprises that a plurality of modules and described module further comprise at least one interface module.

3. according to the described network node of claim 1, wherein said network node comprises that a plurality of modules and described module further comprise central module.

4. according to the described network node of claim 1, comprise that further intra-node network generator (5) is used to described at least one module that connection is provided.

5. according to the described network node of claim 4, wherein said intra-node network generator (5) is suitable for specific intra-node network transmission protocol operation, and

The described transfer function (11,21,31,41,62 of described at least one module; 72,73) adapt to according to the described network transmission protocol traffic is converted to the form that is suitable for the described intra-node network transmission protocol, and/or receive and to be converted to the described network transmission protocol from the traffic that described intra-node network generator receives from the traffic of described intra-node network generator and according to the described intra-node network transmission protocol.

6. according to the described network node of claim 5, the wherein said intra-node network transmission protocol is an Ethernet protocol.

7. according to the described network node of claim 5, wherein said intra-node network generator is a switch.

8. according to the described network node of claim 1, further comprise the device of the described software of the described transfer function that is used to upgrade described at least one module.

9. described network node according to Claim 8, the device that wherein is used to upgrade described software is configured to make that described software can remote update.

10. according to the described network node of claim 1, the wherein said network transmission protocol is Internet protocol (IP).

11. according to the described network node of claim 1, the wherein said network transmission protocol is an ATM(Asynchronous Transfer Mode).

12. according to the described network node of claim 1, wherein said network node is the base station.

13. according to the described network node of claim 1, wherein said network node is independent asynchronous communication model (ATM) cross connection node.

14. according to the described network node of claim 1, wherein said network node is Internet protocol (IP) router.

15. according to the described network node of claim 1, wherein said network node is a general hardware platform.

16. according to the described network of claim 15, wherein, described general hardware platform can depend on described software and be used as independent ATM(Asynchronous Transfer Mode) cross connection node or Internet protocol (IP) router.

17. a method that is used for the operational network node, wherein said network node comprise at least one module (1,2,3,4,6; 7), described module comprises transfer function to support particular network transport protocol, and described method comprises step:

Carry out described transfer function by using software.

18. according to the described method of claim 17, wherein said network node comprises a plurality of modules, and described module comprises at least one interface module.

19. according to the described method of claim 17, wherein said network node comprises a plurality of modules, and described module comprises central module.

20., comprise that further intra-node network generator (5) is used to connect described at least one module according to the described method of claim 17.

21. according to the described method of claim 20, wherein said intra-node network generator (5) adapts to specific intra-node network transmission protocol operation, described method further comprises following step:

By using the described transfer function of described at least one module, according to the described network transmission protocol, the traffic is converted to the form that is suitable for the described intra-node network transmission protocol, and/or

By using the described transfer function of described at least one module,, will be converted to the described network transmission protocol from the traffic that described intra-node network generator receives according to the described intra-node network transmission protocol.

22. according to the described method of claim 21, the wherein said intra-node network transmission protocol is an Ethernet protocol.

23. according to the described method of claim 21, wherein said intra-node network generator is a switch.

24. the described method according to claim 17 further comprises step:

Upgrade the described software of the described transfer function of described module.

25. according to the described method of claim 24, wherein said step of updating is long-range execution.

26. according to the described method of claim 17, the wherein said network transmission protocol is Internet protocol (IP).

27. according to the described method of claim 17, the wherein said network transmission protocol is the ATM(Asynchronous Transfer Mode) agreement.

28. according to the described method of claim 17, wherein said network node is the base station.

29. according to the described method of claim 17, wherein said network node is independent ATM(Asynchronous Transfer Mode) cross connection node.

30. according to the described method of claim 17, wherein said network node is Internet protocol (IP) router.

31. according to the described method of claim 17, wherein said network node is a general hardware platform.

32. according to the described method of claim 32, described general hardware platform can depend on described software and be used as independent ATM(Asynchronous Transfer Mode) cross connection node or Internet protocol (IP) router.

33. a computer program that is used for computing machine comprises that the attainable instruction of processor is used for carrying out the described step according to one method of claim 17 to 32.

34. according to the described computer program of claim 33, wherein said computer program comprises the computer-readable medium that software code partly is stored thereon.

35. according to the described computer program of claim 33, wherein said computer program is directly can be loaded in the internal storage of described computing machine.

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