CN100502533C - Grading code transmission system for single frequency net - Google Patents
Grading code transmission system for single frequency net Download PDFInfo
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- CN100502533C CN100502533C CNB2007100974901A CN200710097490A CN100502533C CN 100502533 C CN100502533 C CN 100502533C CN B2007100974901 A CNB2007100974901 A CN B2007100974901A CN 200710097490 A CN200710097490 A CN 200710097490A CN 100502533 C CN100502533 C CN 100502533C
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Abstract
The invention comprises: single frequency network base station used for sending MBMS service data; E-Node B used for receiving MBMS service data, and replaying the MBMS service data in its transmission time slot; and terminal used for receiving MBMS service data from the single frequency network base station and/or E-Node B. The invention can remove the possibility of interference and system closed-loop oscillatory.
Description
Technical field
The present invention relates to the communications field, and especially, relate to a kind of grading code transmission system that is used for single frequency network, it is particularly useful for multimedia broadcasting and multicast service (abbreviating MBMS as).
Background technology
The MBMS business is a new business that applies to 3-G (Generation Three mobile communication system) that is proposed in Release 6 by third generation partner plan (abbreviating 3GPP as), MBMS can realize that a data source sends data to a plurality of users among the mobile network, is the business of a corner to multiple spot.Its maximum characteristics are effectively to utilize Radio Resource and Internet resources.
Single frequency network is meant that the sub-district under all single frequency network transmits same business simultaneously on same frequency range.Carry the MBMS business by the mode of single frequency network among the LTE, employing be the OFDM transmission technology, its purpose is to provide the high-speed downstream business in bigger coverage.The Serving cell under the single frequency network and the multipath signal of neighbor cell can provide diversity for portable terminal, thereby improved the professional quality of reception of portable terminal, and single frequency network carrying broadcasting service can realize covering on a large scale, so its sub-district area coverage is much larger than the mobile cellular net of routine.
Yet, path loss, shadow fading, the influence that declines soon make can't realize non-blind area, seamless covering under single frequency network, and quality of service decline is very serious near cell boarder, therefore only relies on the transmitting base station in the sub-district to be difficult to make user's satisfaction rate of whole network to higher level.
Can occur the situation of sub-district and the covering area overlapping of mobile cellular under the single frequency network when single frequency network carrying MBMS is professional, that is, the sub-district in single frequency network can be overlapping with a plurality of cellular cells by E-Node B covering, as shown in Figure 1.
At present, hierarchical coding has application more widely in the transmission of video data.The basic thought of hierarchical coding is that original video data is obtained the son stream of many levels by hierarchical coding, and one of them is basic stream, terminal obtain this substantially stream can decode separately and obtain the video image of gross; Other sub-stream is enhanced flow, if terminal can also receive enhanced flow when receiving basic stream, then can obtain higher-quality image, and in like manner, if terminal can also receive more enhanced flow simultaneously, then picture quality can be further improved.Wherein, the hierarchical coding structural representation as shown in Figure 2.
Be not difficult to find out, utilize hierarchical coding to carry out transfer of data under the single frequency network, the quality of transfer of data can be improved equally,, quality of service can be further improved undoubtedly if can be applied to the sub-district in the single frequency network and a plurality of overlapping this situation of cellular cell that covers by E-Node B.Yet, do not propose that as yet hierarchical coding is used for single frequency network at present and use the technical scheme that E-NodeB carries out the MBMS transfer of data simultaneously.
Summary of the invention
Consider the problems referred to above and make the present invention that for this reason, the present invention aims to provide a kind of grading code transmission system that is used for single frequency network.
According to embodiments of the invention, the grading code transmission system that is used for single frequency network comprises:
The single frequency network base station is used to send multimedia broadcast and multicast service data, and wherein, multimedia broadcast and multicast service data comprises basic stream and enhanced flow; E-Node B is used for from the basic stream of single frequency network base station receiving multimedia broadcast multi-cast business data or stream and enhanced flow substantially, and transmits the multimedia broadcast and multicast service data receive in its transmission time slot; And terminal, be used for from the single frequency network base station and/or the basic stream of E-Node B receiving multimedia broadcast multi-cast business data or stream and enhanced flow substantially.
On time domain, single frequency network base station and E-Node B separate transmitting multimedia broadcast multicast service; On network configuration, single frequency network base station and E-Node B Delamination Transmission multimedia broadcast-multicast service.
Here, E-Node B any in can be in the following manner receives basic stream from the single frequency network base station: directive antenna wireless transmission, wired mode are transmitted.
And E-Node B any in can be in the following manner receives enhanced flow from the single frequency network base station: directive antenna wireless transmission, wired mode are transmitted, the mobile cellular network transmission.
Be positioned at E-Node B under the situation of coverage of the enhanced flow that can receive the single frequency network base station, it can receive the basic stream and the enhanced flow of single frequency network base station.At this moment, E-Node B merges basic stream and enhanced flow in physical layer.
On the other hand, under the situation outside E-Node B is positioned at the coverage of the enhanced flow that can receive the single frequency network base station, it can receive the basic stream that launch simultaneously a plurality of single frequency network base station.At this moment, E-Node B can Diversity Reception handle basic stream.And E-NodeB is when terminal sends basic stream, and the notice terminal does not have the transmission of enhanced flow.
Particularly, in this system, terminal is under the situation of basic stream that can receive the single frequency network base station and enhanced flow, and whether it can select the transmission time slot receiving multimedia broadcast multi-cast business data at E-Node B; If terminal is chosen in the transmission time slot of E-Node B and receives, then terminal will be finished merging in physical layer from the multimedia broadcast and multicast service data of a plurality of E-Node B, and/or will finish merging at media access control layer from the multimedia broadcast and multicast service data of single frequency network base station and E-Node B; If the terminal selection does not receive at the transmission time slot of E-Node B, then terminal enters battery saving mode.
In addition,, terminal can not receive the enhanced flow of single frequency network base station if can receiving the basic stream of single frequency network base station, and can receive the multimedia broadcast and multicast service data of E-Node B, then basic stream and/or the enhanced flow that whether the terminal selection receives and/or selective reception E-Node B transmits in the transmission time slot of E-Node B; If the terminal selection does not receive at the transmission time slot of E-Node B, then terminal enters battery saving mode.
And when terminal only can receive the multimedia broadcast and multicast service data of E-Node B, terminal only received in the transmission time slot of E-Node B, and entered battery saving mode in the transmission time of single frequency network base station.
In addition, in the method, on time domain, described single frequency network base station and described E-NodeB separate transmitting multimedia broadcast multicast service; On network configuration, described single frequency network base station and described E-Node B Delamination Transmission multimedia broadcast-multicast service.
By technique scheme of the present invention, make single frequency network base station in the single frequency network and the quality of service in the E-Node B coverage be improved, kept the quality of service in the coverage stable and balanced, make the quality of MBMS business reach controlled and adjustable simultaneously, can save and optimize transmission resource of network, expanded the coverage of high-quality MBMS business, eliminated E-Node B and single frequency network base station for supporting hierarchical coding in the network configuration of institute's framework, to transmit designed transmission means simultaneously, and the possibility of the interference that when MBMS transmission is professional, may cause between the E-Node B and system's closed loop vibration.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 be illustrate according in the sub-district of the single frequency network of correlation technique with the schematic diagrames of the overlapping situation of a plurality of cellular cells that cover by E-Node B;
Fig. 2 is the schematic diagram that illustrates according to the hierarchical coding structure of correlation technique;
Fig. 3 is the block diagram according to the grading code transmission system that is used for single frequency network of the embodiment of the invention;
Fig. 4 is the zone covering schematic diagram according to the single-frequency junction network of the embodiment of the invention;
Fig. 5 is according to the grading code transmission system single frequency network base station that is used for single frequency network of the embodiment of the invention and the schematic diagram of the single downlink transmission means between the E-Node B;
Fig. 6 is the schematic diagram according to the basic frame structure of grading code transmission system system that is used for single frequency network of the embodiment of the invention; And
Fig. 7 is the system that sends data according to the single frequency network base station of the embodiment of the invention and zone according to the system of data that E-Node B is sent as relaying of correlation technique covers schematic diagram relatively.
Embodiment
According to embodiments of the invention, provide a kind of grading code transmission system that is used for single frequency network.
In the present invention, use is in the relay station of the E-Node B of the mobile cellular net in the single frequency network cell as MBMS transmission business under the single frequency network, cooperate the MBMS business of transmitting hierarchical coding with the single frequency network base station in the single frequency network, thereby realize that the interior quality of service of coverage strengthens and the expansion of coverage.
As shown in Figure 3, the grading code transmission system that is used for single frequency network according to the embodiment of the invention comprises: single frequency network base station (can be described as the professional transmitting base station of MBMS, big base station again) 302 is used to send the MBMS business datum; E-Node B 304 is used for from the single frequency network base station 302 and receives the MBMS business datums, and in its transmission time slot the transmitting MBMS business datum; And terminal 306, be used for from single frequency network base station 302 and/or E-Node B 304 reception MBMS business datums.
Wherein, the MBMS business datum comprises basic stream and enhanced flow, and the two all transmits in the transmission time of single frequency network base station.
Here, any one mode during E-Node B 304 can transmit by directive antenna wireless transmission, wired mode is the basic stream of 302 receptions from the single frequency network base station, and in the transmission course of basic stream, preferably, can adopt the code modulation mode of low order to reach interior covering on a large scale, this coverage can all be included the coverage cell of E-Node B, also can not exclusively comprise the coverage cell of E-Node B.
And, E-Node B 304 can transmit by directive antenna wireless transmission, wired mode, any one mode in the mobile cellular network transmission 302 receives enhanced flows from the single frequency network base station, and in the transmission course of enhanced flow, preferably, can adopt the code modulation mode of high-order to realize to the covering among a small circle around on a large scale, as shown in Figure 4, with respect to the receiving ability of terminal 306, dotted line circle 1 is the enhanced flow area of coverage, and solid circles 2 is the basic stream area of coverage.
For the MBMS business data transmission between single frequency network base station 302 and the E-Node B 304, on time domain, separate the MBMS transmission business between the two, and on network configuration, between the two Delamination Transmission MBMS business.Preferably, can keep the regular hour adjusts protection at interval in the transmission separated place of single frequency network base station 302 and relaying E-Node B (that is, above-mentioned E-Node B 304) synchronously as E-Node B 304.E-Node B 304 needs partly to notify in control information the transmission situation of terminal 306 encoding streams at different levels when the MBMS business is transmitted.
Particularly, (for example be positioned at E-Node B under the situation of coverage of the enhanced flow that can receive the single frequency network base station, E-Node B is arranged in the position of Fig. 4 RS#1), this moment, E-Node B can receive the basic stream and the enhanced flow of a plurality of single frequency network base station, and E-Node B merges basic stream and enhanced flow in physical layer.Simultaneously, because the stronger receiving ability (as many antennas) of E-Node B, E-Node B height is much larger than terminal, there is the direct projection footpath that equates between E-Node B and the single frequency network base station, thereby is in the enhanced flow that E-Node B in the single frequency network base station range can receive the transmission of single frequency network base station.
Therefore for the E-Node B in the coverage that is in the single frequency network base station, its effect is that the business that strengthens in the single frequency network base station overlay area receives, and expands the coverage of high-quality business by sending enhanced flow simultaneously.
On the other hand, under the situation outside E-Node B is positioned at the coverage of the enhanced flow that can receive the single frequency network base station (for example, in Fig. 4 on the position of RS#2), this moment, E-Node B can receive the basic stream that launch simultaneously a plurality of single frequency network base station, and Diversity Reception is handled basic stream.
Wherein, the effect that is in the E-Node B of RS# 2 position has been to enlarge the coverage of MBMS business, and has guaranteed the transmission of the MBMS business of gross in its coverage, also can improve the transmitting capacity of MBMS business simultaneously.
In addition, E-Node B can receive the basic stream of a single frequency network base station or a plurality of single frequency network base station, and the reception of enhanced flow can directly be received or adopt at the place, base station directive antenna, wire transmission or be transferred to E-Node B by mobile cellular network by E-Node B from the base station.
As previously mentioned, when carrying out the transmission of MBMS business, separate transmission in time from time angle single frequency network base station and E-Node B, whole network from carrying MBMS business, it is Delamination Transmission, so just can eliminate both because the closed loop vibration under the single frequency network has been avoided in the interference that processing delay caused.
And be provided with certain processing delay protection that is used for adjustment synchronously at interval at the transmission separation of single frequency network base station and relaying E-Node B; can receive single frequency network base station signal or relaying E-Node B (promptly for terminal; above-mentioned E-Node B) provides diversity gain signal the time, thereby reduce because the asynchronous interference that causes.
After E-Node B finishes reception to the basic stream of single frequency network base station and enhanced flow, handle, and when corresponding relay station transmission time slot arrives, send.If the relay station place only can receive basic stream, then send basic stream, and the notice terminal there is not the transmission of enhanced flow in the corresponding transmission time.Accompanying drawing 5 is the single downlink transmission means schematic diagram of single frequency network base station and relaying E-Node B.
For being supported in the transmission of carrying out hierarchical coding MBMS business under the above-mentioned network configuration, designed the basic frame structure of system, wherein the basic frame structure of system is as shown in Figure 6.Consider the expansion support of other business and network the arrangement of uplink time is considered in the scheduling and the control of terminal in frame structure.Carry out the control information and the service data information of transport service in time in the downlink transfer of single frequency network base station and relay station.
To the various situations that terminal receives the MBMS business datum that the single frequency network base station sends be described in detail below.
Situation one, terminal can receive the basic stream and the enhanced flow of single frequency network base station:
Whether terminal can be selected to receive the MBMS business datum at the transmission time slot of E-Node B; If terminal is chosen in the transmission time slot of E-Node B and receives, then terminal will be finished merging in physical layer from the MBMS business datum of a plurality of E-Node B, also can will finish merging at media access control layer from the MBMS business datum of single frequency network base station and E-Node B; If the terminal selection does not receive at the transmission time slot of E-Node B, then terminal enters battery saving mode.
Situation two, terminal can receive the basic stream of single frequency network base station and can not receive the enhanced flow of its emission:
Terminal can select whether to receive the MBMS business datum in the transmission time slot of E-Node B, and basic stream and/or the enhanced flow can selective reception E-Node B transmitted; If the terminal selection does not receive at the transmission time slot of E-Node B, then terminal enters battery saving mode.
Situation three, terminal only can receive the MBMS business datum of E-Node B:
Terminal only receives in the transmission time slot of E-Node B, and enters battery saving mode in the transmission time of single frequency network base station.
By top description as can be seen, hierarchical coding and Delamination Transmission are used for network, it is controlled that network side is accomplished for the quality of business and covering, also makes the MBMS business can accomplish to carry out professional scheduling and adjusting according to network traffic conditions in transmission over networks simultaneously.
For example, E-Node B can select the basic stream of only transmission when business load is heavier, or even does not carry out professional transmission, and single frequency network base station and adjacent E-Node B cooperate the raising transmitting power to reach the covering of keeping certain limit simultaneously.Equally, when E-Node B carries out the transmission of enhanced flow, can select the transmission rank of enhanced flow according to self-ability neatly, so not only make Node B can reach professional expeditiously and send, can also improve the quality of reception of the MBMS business in the coverage simultaneously.
In addition, use hierarchical coding and Delamination Transmission to make the transmission of MBMS business have more high efficiency and flexibility.The single frequency network base station has been shown among Fig. 7 under the single frequency network to be cooperated with relaying E-NodeB the sub-district is covered, can obtain from simulation curve figure, in use behind E-NodeB, the professional quality of reception of whole sub-district is significantly improved, and has expanded professional coverage.
In sum,, the possibility of interference and system's closed loop vibration be can eliminate, the quality of MBMS business, steady quality and the equilibrium that keeps the MBMS business improved by means of technical scheme of the present invention; Can realize control, thereby optimize transmission resource of network, expand the coverage of high-quality MBMS business the MBMS quality of service.
It will be appreciated by those skilled in the art that above is that example has been described embodiments of the invention with the MBMS business just, and in addition, the present invention also can be used for other packet radio data service.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a grading code transmission system that is used for single frequency network is characterized in that, comprising:
The single frequency network base station is used to send multimedia broadcast and multicast service data, and wherein, described multimedia broadcast and multicast service data comprises basic stream and enhanced flow;
E-Node B is used for receiving from described single frequency network base station the basic stream of described multimedia broadcast and multicast service data or stream and enhanced flow substantially, and transmits the described multimedia broadcast and multicast service data that receives in its transmission time slot; And
Terminal, be used for from described single frequency network base station and/or described E-Node B receive the basic stream of described multimedia broadcast and multicast service data or substantially stream and enhanced flow.
2. the grading code transmission system that is used for single frequency network according to claim 1, it is characterized in that described E-Node B any in the following manner receives described basic stream from described single frequency network base station: directive antenna wireless transmission, wired mode are transmitted.
3. the grading code transmission system that is used for single frequency network according to claim 1, it is characterized in that described E-Node B any in the following manner receives described enhanced flow from described single frequency network base station: directive antenna wireless transmission, wired mode are transmitted, the mobile cellular network transmission.
4. according to claim 2 or the 3 described grading code transmission systems that are used for single frequency network, it is characterized in that, described E-Node B receives the described basic stream and the described enhanced flow of described single frequency network base station under the situation of the coverage that is positioned at the described enhanced flow that can receive described single frequency network base station.
5. the grading code transmission system that is used for single frequency network according to claim 4 is characterized in that, described E-Node B merges described basic stream and described enhanced flow in physical layer.
6. according to claim 2 or the 3 described grading code transmission systems that are used for single frequency network, it is characterized in that, under the situation of described E-Node B outside the coverage that is positioned at the described enhanced flow that can receive described single frequency network base station, receive the described basic stream that launch simultaneously a plurality of single frequency network base station.
7. the grading code transmission system that is used for single frequency network according to claim 6 is characterized in that, described E-Node B Diversity Reception is handled described basic stream.
8. the grading code transmission system that is used for single frequency network according to claim 6 is characterized in that, described E-Node B notifies described terminal not have the transmission of described enhanced flow when sending described basic stream to terminal.
9. the grading code transmission system that is used for single frequency network according to claim 1 is characterized in that,
Can receive in described terminal under the situation of the described basic stream of described single frequency network base station and described enhanced flow, whether select described transmission time slot receiving multimedia broadcast multi-cast business data at described E-Node B;
If described terminal is chosen in the described transmission time slot of described E-Node B and receives, then described terminal will be finished merging in physical layer from the multimedia broadcast and multicast service data of a plurality of E-Node B, and/or will finish merging at media access control layer from the multimedia broadcast and multicast service data of described single frequency network base station and described E-Node B;
If described terminal selection does not receive at the described transmission time slot of described E-Node B, then described terminal enters battery saving mode.
10. the grading code transmission system that is used for single frequency network according to claim 1 is characterized in that,
, described terminal can not receive the described enhanced flow of described single frequency network base station if can receiving the described basic stream of described single frequency network base station, and can receive the multimedia broadcast and multicast service data of described E-Node B, whether then described terminal selection receives and/or the described E-Node B of selective reception transmits described basic stream and/or described enhanced flow in the described transmission time slot of described E-Node B;
If described terminal selection does not receive at the described transmission time slot of described E-Node B, then described terminal enters battery saving mode.
11. the grading code transmission system that is used for single frequency network according to claim 1 is characterized in that,
When described terminal only can receive the multimedia broadcast and multicast service data of described E-Node B, described terminal only received in the described transmission time slot of described E-Node B, and enters battery saving mode in the transmission time of described single frequency network base station.
12. the grading code transmission system that is used for single frequency network according to claim 1 is characterized in that, on time domain, described single frequency network base station and described E-Node B separate transmitting multimedia broadcast multicast service; On network configuration, described single frequency network base station and described E-Node B Delamination Transmission multimedia broadcast-multicast service.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100974901A CN100502533C (en) | 2007-05-09 | 2007-05-09 | Grading code transmission system for single frequency net |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100974901A CN100502533C (en) | 2007-05-09 | 2007-05-09 | Grading code transmission system for single frequency net |
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| CN101052139A CN101052139A (en) | 2007-10-10 |
| CN100502533C true CN100502533C (en) | 2009-06-17 |
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| CN101505452B (en) * | 2008-02-04 | 2012-06-27 | 华为技术有限公司 | Mapping method for uni-frequency network region |
| US8929268B2 (en) | 2009-06-17 | 2015-01-06 | Intel Corporation | Techniques for hierarchical encoding for multicast broadcast services in wireless communication systems |
| US9007979B2 (en) | 2008-09-29 | 2015-04-14 | Electronics And Telecommunications Research Institute | Apparatus and method for transmitting and receiving data in wireless communication system using relay |
| JP5836424B2 (en) * | 2014-04-14 | 2015-12-24 | ソニー株式会社 | Transmitting apparatus, transmitting method, receiving apparatus, and receiving method |
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