CN101909286B - Cooperative communication method of relay network, multi-hop base station and relays - Google Patents
Cooperative communication method of relay network, multi-hop base station and relays Download PDFInfo
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Abstract
The invention discloses a cooperative communication method of a relay network, which comprises the following steps: a multi-hop base station (MR-BS) determines a relay collection for providing cooperative service for UE of a user; relays coordinate with the MR-BS according to scheduling information and self load condition, so as to determine a cooperative relay, and the MR-BS allocates relay link resources for feeding back a monitoring state for the cooperative relay; the cooperative relay monitors the data transmitted by the UE to the MR-BS, and when the MR-BS fails to correctly decode data transmitted by the UE, the cooperative relay cooperates with the UE to transmit the data, recodes monitored data and transmits the recoded data to the MR-BS; and the MR-BS combines the data transmitted by the UE and the data transmitted by the cooperative relay and decodes the combined data. The invention also discloses a multi-hop base station and relays for cooperative communication in the relay network. The embodiment of the invention contributes to the balancing of relay link load, reduction of resource waste in a relay link and improvement on the reliability of an access link.
Description
Technical field
The present invention relates to wireless communication technology field, more specifically, relate to cooperative communication method, multi-hop base station and relaying in a kind of junction network.
Background technology
The transmission feature of radio communication broadcasting so that the transmission of signal from the source to the destination can by around website listen to.Based on this feature, cooperative communication is introduced into.It refers to processes from the data that website on every side listens to these, and retransmits to the destination, gets higher network throughput and reliability thereby create diversity effect.
Transmission link usually faces channel fading and causes abominable channel condition in the radio communication, usually requires data packet retransmission to guarantee the correct reception of data, namely feeds back to adjust corresponding biography and does not pass or transmission means by channel conditions timely.But take above-mentioned measure meeting to cause the rapid raising of control signal, moreover can't accomplish under some situation to feed back timely, cause system performance degradation.Usually recommend diversity effect to overcome problems, excited and in LTE advanced system, used the technology that cooperative communication improves systematic function.At present, in the LTE advanced system research, realize multi-hop transmission by utilizing RS, cover thereby satisfy qos requirement and improve the zone.The introducing of via node has brought larger impact to allocation of radio resources and the scheduling of system.From the angle of allocation of radio resources, the base station not only will be the access link Resources allocation, also will be newly-increased interface repeated link Resources allocation.And from scheduling, generally have dual mode, a kind of is that the scheduling that interior all nodes of multihop cell comprise the UE that RS and RS cover is responsible in the base station, is called as the centralized dispatching mode; Another is that the base station only is responsible for repeated link and is transmitted the namely scheduling of RS itself, and the UE of RS covering finishes scheduled transmission by RS, and this mode is called as distributed scheduling.
The implementation of the cooperative communication under the existing centralized scheduling is that MR-BS is defined as the RS that UE provides partner services.In Fig. 1 b, when UE sends data, provide partner services RS can not be other UE services.MR-BS is providing partner services RS repeated link to distribute resource simultaneously, is used for providing partner services RS to transmit the data of UE.If provide partner services RS can not the data that UE sends be correctly decoded, then this part resource can be wasted, if the more wasting of resources amount that causes of cooperation relaying number significantly increases.
The normally used scheme of existing distributed scheduling is, by UE and the MR-BS direct communication that MR-BS served.And being sent data to RS by the UE that RS served, RS further is transmitted to MR-BS.Under distributed scheduling, specific to data packet transmission, relaying can oneself produce schedule information.In accompanying drawing 1a, the UE in the RS coverage does not directly send data to MR-BS, if data can not correctly receive, MR-BS sends NACK to UE, and notice UE retransmits.In accompanying drawing 2a, the UE in the RS coverage sends data to RS, and the further forwarding data of RS is to MR-BS.If MR-BS is receive data correctly, MR-BS sends NACK to UE, and notice UE retransmits.Usually UE transfers data to MR-BS again, can cause the rapid raising of control signal, moreover can't accomplish under some situation UE is transmitted failed timely feedback, causes system performance degradation.And transmit to MR-BS in the process of data at UE, what MR-BS control was lower just might listen to the data that UE transmits to MR-BS at the RS of idle condition, but this RS does not have resource at repeated link, so can not help UE to transmit data to MR-BS.
Summary of the invention
The embodiment of the invention proposes the cooperative communication method in a kind of junction network, with the wasting of resources on balancing of relay link load and the minimizing repeated link.
The embodiment of the invention also proposes the multi-hop base station in a kind of junction network, with the wasting of resources on balancing of relay link load and the minimizing repeated link.
The embodiment of the invention also proposes the relaying in a kind of junction network, with the wasting of resources on balancing of relay link load and the minimizing repeated link.
The technical scheme of the embodiment of the invention is as follows:
Cooperative communication method in a kind of junction network may further comprise the steps:
Multi-hop base station MR-BS determines to provide to user UE the relay collection of partner services;
MR-BS is sent to each relaying in the described relay collection with schedule information, each relaying in the described relay collection is coordinated according to schedule information and self load condition and MR-BS respectively, determine the cooperation relaying, MR-BS is the repeated link resource that described cooperation relay distribution is used for the feedback listening state;
Described cooperation relaying transmits data to UE to MR-BS and monitors, and when MR-BS can not be correctly decoded the data that UE sends, transmits data by cooperation relaying and the UE cooperation division of labor, sends to MR-BS behind the data recompile of cooperation relaying with monitoring;
MR-BS merges decoding with the data of UE transmission with by the data that described cooperation relaying sends.
The multi-hop base station MR-BS of the cooperative communication in a kind of junction network comprises:
Control module is used for being defined as the relay collection that user UE provides service, sends schedule information to Coordination module, for described cooperation relaying in the repeated link Resources allocation;
Coordination module is used for receiving scheduling information, coordinates to determine the cooperation relaying with the relaying in the relay collection;
Merge decoder module, merge decoding for data behind the recompile of the data that UE is sent and cooperation RS transmission.
The relaying RS of the cooperative communication in a kind of junction network comprises:
Coordination module is used for coordinating with multi-hop base station MR-BS, determines the cooperation relaying;
Monitor module, be used for that UE is transmitted data to MR-BS and monitor, and the data that listen to are sent data processing module;
Coding module is used for monitoring the data recompile that module listens to, and sends MR-BS.
From technique scheme, can find out, in embodiments of the present invention, in Fig. 1 b, when UE107 transmits data to MR-BS105, and the relaying around the UE107 just in time is in good Link State and when redundant resource is arranged, MR-BS105 with just in time be in good Link State and have the relaying of redundant resource to coordinate, select qualified relaying 106 as the cooperation relaying.The data recompile that 106 pairs on cooperation relaying listens to also is sent to MR-BS105.When the data that are sent to the MR-BS105 place as UE107 can not be correctly decoded, the data behind the recompile that the misdata that MR-BS105 sends UE107 and cooperation relaying 106 send merged decoding, obtain the correct data that UE107 transmits.In data transfer procedure, take full advantage of qualified relaying and help the UE the transmission of data, thereby balancing of relay link is sent out load, reduce the repeated link wasting of resources.
In Fig. 2 b, when UE208 transmits data to MR-BS205, UE208 is in the coverage of relaying 206, and relaying 206 is control relayings of UE208.When other around the UE208 just in time is in good Link State and redundant resource arranged relaying, MR-BS205 with just in time be in good Link State and have the relaying of redundant resource to coordinate, select qualified relaying 207 as the cooperation relaying.207 pairs on cooperation relaying listens to the data recompile and is sent to MR-BS205.The data that are sent to relaying 206 places as UE208 can not be correctly decoded, or relaying 206 data that are sent to the MR-BS205 place are can not be correctly decoded the time, the data of MR-BS205 after to the data of control relaying 206 mistake of sending and recompile that cooperation relaying 207 sends merge decoding, obtain the correct data that UE208 transmits.Similarly, in data transfer procedure, take full advantage of qualified relaying and help the UE the transmission of data, thereby balancing of relay link is sent out load, reduce the repeated link wasting of resources.
Description of drawings
Fig. 1 is the transfer of data contrast schematic diagram that direct communication is communicated by letter with cooperative among the embodiment 1, comprises Fig. 1 a and Fig. 1 b;
Fig. 2 is the transfer of data contrast schematic diagram that direct communication is communicated by letter with cooperative among the embodiment 2, comprises Fig. 2 a and Fig. 2 b;
Fig. 3 is according to method flow schematic diagram in the embodiment of the invention 1;
Fig. 4 is according to cooperation RS handling process schematic diagram in the embodiment of the invention 1;
Fig. 5 is according to MR-BS handling process schematic diagram in the embodiment of the invention 1;
Fig. 6 is according to method flow schematic diagram in the embodiment of the invention 2;
Fig. 7 is according to cooperation RS handling process schematic diagram in the embodiment of the invention 2;
Fig. 8 is according to MR-BS handling process schematic diagram in the embodiment of the invention 2;
Fig. 9 is the multi-hop base station structural representation of the cooperative communication in a kind of junction network;
Figure 10 is the relay structure schematic diagram of the cooperative communication in a kind of junction network.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
In embodiments of the present invention, relaying RS and multi-hop base station MR-BS are the relations of distributed scheduling.Be that RS can dispatch the user UE under oneself controlling, but this UE is not subjected to the control of MR-BS.RS herein refers to relaying.Other RS under the MR-BS control can provide partner services to the UE under being controlled by MR-BS, and this RS is called cooperation RS.
In embodiment 1, such as Fig. 1 b, when the not UE107 in the RS106 coverage and MR-BS105 direct communication, depend on the employed through-put power of UE107, RS106 may listen to this data message.Compare to the access link of MR-BS105 with UE107, the repeated link by RS106 can provide more reliable transmission.
Shown in Fig. 1 b, when UE107 had data to pass to MR-BS105, if RS106 listens to, and when having the repeated link resource available, RS106 was with the cooperation the transmission of data that helps.
HARQ can divide into first kind HARQ or Equations of The Second Kind HARQ or the 3rd class HARQ according to the difference of the mode of re-transmission.First kind HARQ is called again traditional HARQ, and its operation principle is as follows: at first receiving terminal carries out error correction to data groupings, if wrong and can't correct, just send solicited message and retransmits.Abandon simultaneously wrong packet.Use identical forward error control during re-transmission, namely redundant information is the same.Equations of The Second Kind HARQ scheme belongs to the ARQ scheme of steadily increase redundancy.Equations of The Second Kind HARQ scheme has been considered the time difference characteristic of radio propagation channel, does not have when transmission data block first or with less redundancy.If bust this retransmits beginning.The data block that retransmits is not copying of the data block that passes first, but has increased redundancy section wherein.At receiving terminal, the data block of mistake is not simply discarded, but the data block of receiving for twice is merged, and code rate can decrease but improve coding gain like this.In Equations of The Second Kind HARQ scheme, the redundancy versions of each re-transmission is different, and each data that retransmit must could be deciphered after merging with the data of transmitting previously.The 3rd class HARQ scheme also belongs to incremental, what it was different from Equations of The Second Kind HARQ scheme is to retransmit code word to have the self-demarking code ability, therefore receiving terminal can be directly in the middle of retransmit code word decoding recover data, also the code word that retransmits code word and existing buffer memory of makeing mistakes can be merged rear decoding.
In the embodiment of the invention packet waiting for transmission (packet) is grouped into several data blocks, is referred to as HARQ packet 1, HARQ packet 2 etc.Wherein HARQ packet 1 is the data that need transmit first, the data that need transmit when HARQ packet 2 grades are re-transmission.HARQ packet 2 grades can obtain HARQ packet1 decoding and recompile, and recompile can adopt Equations of The Second Kind HARQ or the 3rd class HARQ coded system.
Illustrate, suppose that UE107 has data to transmit, and be divided into HARQ packet 1, HARQ packet 2 grades are prepared successively transmission.If RS106 is receive data HARQ packet 1 correctly, it is that HARQ packet 2 and help UE107 transmit remaining HARQ packet 2 grades to MR-BS with HARQ packet 1 decoding and the recompile that receives, and RS106 is cooperation RS.Because repeated link can provide more reliable transmission than access link, final UE only need transmit HARQ packet 1.That is to say that cooperation RS processes by decoding, coding and transmits residue data waiting for transmission, thereby improves the transmission link reliability.Cooperative communication herein is only limited to the uplink process.
Fig. 3 is according to method flow schematic diagram in the embodiment of the invention 1, specifically may further comprise the steps:
When UE required MR-BS to distribute the access link resource, UE required to send an interception reference signal in assigned access link resource simultaneously, and MR-BS will send the information notice UE of interception reference signal and all RS under the MR-BS control.
The interception reference signal that step 301, RS send according to UE is measured the received signal strength from UE, and measurement report is sent to MR-BS.MR-BS determines to provide to UE the RS set of partner services according to the measurement report of RS.
Whether step 304, cooperation RS be correct according to the data that the data system credit verification that listens to listens to, and whether the data that namely listen to can be correctly decoded.If the data that cooperation RS monitors can be correctly decoded, then execution in step 306.Cooperation RS can not be correctly decoded the data of monitoring, or does not listen to the data of UE, and then execution in step 305.
Cooperation RS judges not to be had the coded data block that obtains behind enough resource transmission recompiles and merges decoded information in repeated link up channel certain time interval T, or receives the ACK that MR-BS sends, and then execution in step 308.
After step 309, MR-BS received the data of UE transmission, if after the data system information self check that receives of MR-BS basis, it is correct examining the data that receive, then execution in step 310.At this moment, the transfer of data between MR-BS and the UE can not be referred to as cooperative communication.
If MR-BS is according to after the data system information self check that receives, it is wrong examining the data that receive, and namely the data that receive of MR-BS can not be correctly decoded, and then execution in step 311.
If step 311 MR-BS receives coded data block and the merging decoded information that cooperation RS sends at T in the time, then execution in step 312; If MR-BS does not receive coded data block and the merging decoded information that cooperation RS sends at T in the time, then execution in step 302.
If adopt Equations of The Second Kind or the 3rd class HARQ, the data block behind the coding that cooperation RS sends is the incremental redundancy version of the data block of UE transmission.MR-BS merges decoding to the incremental redundancy data block that cooperation RS is sent to behind the MR-BS coding with the data block that UE is sent to MR-BS, thereby strengthens the correctness of the number of bits certificate of UE transmission.
Fig. 4 is according to cooperation RS handling process schematic diagram in the embodiment of the invention 1, specifically may further comprise the steps:
Step 402 receives the schedule information about UE (control information, scheduling resource positional information that transmission is relevant) that is sent by MR-BS.
Step 407, cooperation RS judge has enough resources to send coded data block and merging decoded information that recompile obtains in repeated link up channel certain time interval T, and then execution in step 408.
Cooperation RS judges does not have enough resources to send coded data block and merging decoded information that recompile obtains in repeated link up channel certain time interval T, or receive the ACK (expression MR-BS correctly accepts the data that UE sends) that MR-BS sends, then execution in step 409.
Fig. 5 is according to MR-BS handling process schematic diagram in the embodiment of the invention 1, specifically may further comprise the steps:
All RS under the information notice MR-BS control of the interception reference signal that step 501, MR-BS are to be sent with UE.
The information (transmission relevant control information, scheduling resource positional information) that step 503, MR-BS will dispatch UE is transmitted to the RS in the RS set that partner services is provided.RS obtains coordinating according to self load condition and MR-BS after the schedule information of MR-BS.May the idle UE that also may be used under scheduling oneself control at this RS on the resource of MR-BS scheduling UE.If RS is not dispatching the UE under oneself controlling and determining cooperation on the resource of MR-BS scheduling UE, then RS monitors the data that UE is sent to MR-BS as the cooperation RS of UE in the resource of MR-BS scheduling UE.It also can be a plurality of that cooperation RS can be one.
If MR-BS is according to after the data system information self check that receives, it is wrong examining the data that receive, and namely the data that receive of MR-BS can not be correctly decoded.Then execution in step 508.
If step 509 MR-BS receives coded data block and the merging decoded information that cooperation RS sends at T in the time, then execution in step 510; If MR-BS does not receive coded data block and the merging decoded information that cooperation RS sends at T in the time, then execution in step 512.
If adopt Equations of The Second Kind or the 3rd class HARQ, the data block behind the coding that cooperation RS sends is the incremental redundancy version of the data block of UE transmission.MR-BS merges decoding to the incremental redundancy data block that cooperation RS is sent to behind the MR-BS coding with the data block that UE is sent to MR-BS, thereby strengthens the correctness of the number of bits certificate of UE transmission.
The listening state that step 512, MR-BS report according to cooperation RS determines correctly to listen to the cooperation RS of UE data.
RS reports NACK if MR-BS receives cooperation, and cooperation RS can not be correctly decoded the data of monitoring, or does not listen to the data of UE; RS reports ACK if MR-BS receives cooperation, shows that cooperation RS can be correctly decoded the data that listen to.
In embodiment 2, UE belongs to a certain RS control range, and other RS under the MR-BS control can be UE provides partner services.Control RS and MR-BS are centralized control relations, i.e. UE under RS scheduling oneself control is controlled by MR-BS; Cooperation RS and MR-BS are the relations of distributed scheduling, i.e. UE under RS scheduling oneself control is not controlled by MR-BS.
Particularly, when UE is in a RS coverage, such as Fig. 2 b, depend on the employed through-put power of UE208, other RS207 may listen to this data message.The RS206 that we claim to cover UE208 is the control RS of UE208.Pass to control RS206 when UE208 has data, if other RS207 listen to, and when having the repeated link resource available, other RS207 help the transmission of data with cooperation.
Such as Fig. 2 b, when the UE208 under control RS206 covers has data to pass to MR-BS205, if cooperation RS207 listens to, and when having the repeated link resource available, cooperation RS207 will monitor UE208 and be sent to the data of controlling RS206.RS207 is sent to the MR-BS place after with the data recompile that listens to.MR-BS will control the data of RS206 forwarding and the data of cooperation RS207 transmission merge coding, obtain the data of UE.
Illustrate, suppose that UE208 has data to transmit, and be divided into HARQ packet 1, HARQ packet 2 grades are prepared successively transmission.If RS207 is receive data HARQ packet 1 correctly, it is that HARQ packet 2 and help UE208 transmit remaining HARQ packet 2 grades to MR-BS with HARQ packet 1 decoding and the recompile that receives, and RS207 is cooperation RS.Because repeated link can provide more reliable transmission than access link, final UE only need transmit HARQ packet 1.That is to say that cooperation RS processes by decoding, coding and transmits residue data waiting for transmission, thereby improves the transmission link reliability.Cooperative communication herein is only limited to the uplink process.
Fig. 6 is according to method flow schematic diagram in the embodiment of the invention 2, specifically may further comprise the steps:
When UE requires MR-BS to distribute the access link resource, require simultaneously to send an interception reference signal in assigned access link resource, MR-BS is with the information notice UE of the interception reference signal of transmission and all RS under the MR-BS control.
The interception reference signal that step 601, RS send according to UE is measured the received signal strength from UE, and measurement report is sent to MR-BS.MR-BS determines to provide to UE the RS set of partner services according to the measurement report of RS.
If the data of step 604 cooperation RS to listening to, namely UE is sent to the data of control RS, can be correctly decoded, and then execution in step 606.
The data of cooperation RS to listening to, namely UE is sent to the data of control RS, can not be correctly decoded, or not listen to the data that UE is sent to control RS, and then execution in step 605.
Cooperation RS judges not to be had to obtain coded data block and merge decoded information behind enough resource transmission recompiles in repeated link up channel certain hour, or receives the ACK that MR-BS sends, and then execution in step 608.
Whether RS is correct according to these data of data system credit verification of receiving for step 609, control, and can the data of namely receiving be correctly decoded.If control RS can be correctly decoded the data that UE sends, then control RS transmits UE in the predefined resource of MR-BS data.
If control RS can not be correctly decoded the data that UE sends, then execution in step 610.
If after MR-BS received the data of UE transmission, examining the data of receiving was decoding errors, or receive the NACK (expression control RS receives the UE data failure) that controls RS, then wait for the coded data of certain time interval T reception cooperation RS transmission.
If step 613 MR-BS receives coded data block and merging decoded information that cooperation RS sends in this time period T, then the data decode of cooperation RS transmission or the data of a plurality of cooperation RS transmission are merged decoding; If MR-BS waits for certain time interval T and does not receive the coded data that cooperation RS sends, then returns step 602.
Data behind the recompile that the data that can not be correctly decoded that step 614, MR-BS are received control RS and cooperation RS send merge decoding.
If it is correct that the data behind the recompile that step 615 MR-BS sends the control data that can not be correctly decoded received of RS and cooperation RS merge decoding, then execution in step 616; If merging decoding error, MR-BS determine successfully to receive the cooperation RS of UE data according to the listening state report of cooperation RS and the status report of control RS, return step 602.MR-BS dispatches UE, control RS according to channel conditions and cooperation RS unites re-transmission.
If adopt Equations of The Second Kind or the 3rd class HARQ, the data block behind the coding that cooperation RS sends is the incremental redundancy version of the data block of UE transmission.MR-BS merges decoding to the data block that cooperation RS is sent to incremental redundancy data block and the UE to MR-BS that transmits by control RS behind the MR-BS coding, thereby strengthens the correctness of the number of bits certificate that UE sends.
If step 616, MR-BS judge whether UE and also have data to need to transmit. UE also has data to transmit then returns step 602, otherwise process ends.
Fig. 7 is according to cooperation RS handling process schematic diagram in the embodiment of the invention 2, specifically may further comprise the steps:
The interception reference signal that step 701, RS send according to UE is measured the received signal strength from UE, and measurement report is sent to MR-BS.
The schedule information about UE that step 702, reception are sent by MR-BS (control information, scheduling resource positional information that transmission is relevant).
Whether step 704, cooperation RS be correct according to the data that the data system credit verification that listens to listens to, and can the data that namely listen to be correctly decoded.If the data that cooperation RS monitors are correctly decoded, then execution in step 706; Cooperation RS can not be correctly decoded the data of monitoring, or does not listen to the data of UE, and then execution in step 705.
Step 706, data are carried out recompile.Recompile can adopt Equations of The Second Kind HARQ or the 3rd class HARQ coded system.For different coded systems, can obtain corresponding coded data block and merge decoded information, merge decoded information and indicated which data block of this encoding block and UE transmission can merge decoding.Step 707, cooperation RS judge has enough resources to send coded data block and merging decoded information that recompile obtains in repeated link up channel certain time interval T, and then execution in step 708.
Cooperation RS judges does not have enough resources to send coded data block and merging decoded information that recompile obtains in repeated link up channel certain time interval T, or receive the ACK (expression MR-BS correctly accepts to control the data that RS transmits UE) that MR-BS sends, then execution in step 709.
The data of cooperation RS deletion buffer memory behind step 711, the wait certain hour.
Fig. 8 is according to MR-BS handling process schematic diagram in the embodiment of the invention 2, specifically may further comprise the steps:
The information of the interception reference signal that step 801, MR-BS send UE is sent to all RS under the MR-BS control.
Step 802, MR-BS determine to provide to UE the RS set of partner services to the measurement report of interception reference signal according to all RS under the MR-BS control.
Step 803, MR-BS will control RS and the schedule information of UE (control information, scheduling resource positional information that transmission is relevant) be transmitted to RS in the RS set that partner services is provided.RS obtains after the schedule information of MR-BS carrying out coordination with MR-BS according to self load condition.May the idle UE that also may be used under scheduling oneself control at this RS on the resource of MR-BS scheduling UE.If RS is not dispatching the UE under oneself controlling and determining cooperation on the resource of MR-BS scheduling UE, then RS monitors the data that UE is sent to MR-BS as the cooperation RS of UE in the resource of MR-BS scheduling UE.It also can be a plurality of that cooperation RS can be one.
Step 804, MR-BS are cooperation RS distributes the report of feedback listening state at repeated link resource.
Step 805, MR-BS receive the data that control RS transmits.
Step 806, MR-BS are according to after transmitting the data system information self check of UE by control RS, and it is correct examining the data that receive, and namely the data that receive of MR-BS can be correctly decoded execution in step 807; MR-BS can be correctly decoded the data that UE sends, and then communicating by letter between MR-BS and the UE can not be called cooperative communication.
If MR-BS is according to after transmitting the data system information self check of UE by control RS, it is wrong examining the data that receive, and namely the data that receive of MR-BS can not be correctly decoded.Then execution in step 808.
Step 807, MR-BS send ACK to cooperation RS, and the data of being transmitted UE by control RS are correctly received in expression, do not need cooperation RS to transmit data to MR-BS, and MR-BS scheduling UE sends new data, execution in step 804.
Step 808, MR-BS wait in the time at T and receive coded data block and the merging decoded information that cooperation RS sends.
If step 809 MR-BS receives coded data block and the merging decoded information that cooperation RS sends at T in the time, then execution in step 810; If MR-BS does not receive coded data block and the merging decoded information that cooperation RS sends at T in the time, then execution in step 813.
Step 810, MR-BS merge decoding to the coded data block that control RS and cooperation RS send respectively.
The encoding block that the data that can not be correctly decoded that step 811, MR-BS are received control RS and cooperation RS send merges decoding, if it is correct to merge decoding, then execution in step 807; If the merging decoding error, then execution in step 812.
If adopt Equations of The Second Kind or the 3rd class HARQ, the data block behind the coding that cooperation RS sends is the incremental redundancy version of the data block of UE transmission.MR-BS merges decoding to the data block that cooperation RS is sent to incremental redundancy data block and the UE to MR-BS that transmits by control RS behind the MR-BS coding, thereby strengthens the correctness of the number of bits certificate that UE sends.
Step 812, MR-BS judge according to cooperation RS feedack whether cooperation RS correctly receives the data of UE, and RS reports NACK if MR-BS receives cooperation, and cooperation RS can not be correctly decoded the data of monitoring, or do not listen to the data of UE; RS reports ACK if MR-BS receives cooperation, shows that cooperation RS can be correctly decoded the data that listen to.
MR-BS judges according to control RS feedack whether control RS correctly receives the data of UE.If MR-BS receives control RS NACK, then expression control RS is to the data receiver failure of UE; If MR-BS does not receive the message of control RS, then expression control RS is normal to the data receiver of UE.
If cooperation RS and control RS all correctly receive the data of UE, then execution in step 814.If one of them can not correctly receive the data of UE cooperation RS and control RS, then execution in step 813.
Step 813, MR-BS scheduling UE re-start data and transmit.
Step 814, MR-BS are according to the repeated link situation, and scheduling cooperation RS and control RS unite the data that retransfer, execution in step 810.
The embodiment of the invention also provides the multi-hop base station MR-BS of the cooperative communication in a kind of junction network, such as Fig. 9, comprising: control module 901 is used for being defined as the relay collection that user UE provides service, send schedule information to Coordination module, for described cooperation relaying in the repeated link Resources allocation; Coordination module 902 is used for receiving scheduling information, coordinates to determine the cooperation relaying with the relaying in the relay collection; Merge decoder module 903, merge decoding for data behind the recompile of the data that UE is sent and cooperation RS transmission; Further comprise 904 judge modules, be used for judging that can the data that receive be correctly decoded.
The embodiment of the invention also provides the relaying RS of the cooperative communication in a kind of junction network, such as Figure 10, comprising: 1001 Coordination module, be used for coordinating with multi-hop base station MR-BS, and determine the cooperation relaying; 1002 monitor module, are used for that UE is transmitted data to MR-BS and monitor, and the data that listen to are sent coding module; 1003 coding modules are used for monitoring the data recompile that module listens to, and send MR-BS; Further comprise 1004 judge modules, be used for judging that can the data that receive be correctly decoded; Further comprise 1005 forwarding modules, be used for the data retransmission MR-BS that UE is sent.
From embodiment 1 and embodiment 2 as can be known, when MR-BS does not receive the correct data of UE, by cooperation RS the data of monitoring are done further processing and transmission, effectively finish transfer of data and can improve resource utilization and reduce the terminal energy loss.The data recompile of cooperation RS to listening to can improve the reliability of access link effectively.From embodiment 2 as can be known, nervous when the repeated link resource of control RS, and RS on every side just in time is in good Link State and when redundant resource was arranged, cooperation RS can control for this UE help the transmission of data of RS, with the load of balancing of relay link.Relatively with centralized scheduling under the cooperative communication mode, MR-BS can only not require cooperation RS forwarding data on available resources for each cooperation RS distributes the resource that not be exclusively used in forwarding uplink UE data, has greatly reduced the wasting of resources on the repeated link.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the cooperative communication method in the junction network is characterized in that, may further comprise the steps:
Multi-hop base station MR-BS determines to provide to user UE the relay collection of partner services;
MR-BS is sent to each relaying in the described relay collection with schedule information, each relaying in the described relay collection is coordinated according to schedule information and self load condition and MR-BS respectively, determine the cooperation relaying, MR-BS is the repeated link resource that described cooperation relay distribution is used for the feedback listening state;
Described cooperation relaying transmits data to UE to MR-BS and monitors, and when MR-BS can not be correctly decoded the data that UE sends, transmits data by cooperation relaying and the UE cooperation division of labor, sends to MR-BS behind the data recompile of cooperation relaying with monitoring;
MR-BS merges decoding with the data of UE transmission with by the data that described cooperation relaying sends;
Described cooperation relaying coordinates to comprise according to self load condition and MR-BS,
Described cooperation relaying is dispatched at MR-BS on the resource of described UE, and UE and the decision of not dispatching under oneself controlling provide service for described UE;
When described UE not in all the relay and control scopes under the MR-BS control, described UE and MR-BS direct communication;
The described cooperation division of labor comprises,
Cooperation RS judges can correctly listen to data, and the data recompile that listens to is sent to MR-BS, and cooperation RS judges and can not correctly monitor that cooperation RS sends NACK to MR-BS;
MR-BS receives the data that described UE sends, and MR-BS judges and can not be correctly decoded, then receives the data that cooperation RS sends in the time at T; MR-BS judges can not be correctly decoded the data that do not receive again cooperation RS transmission at T in the time, then redefines cooperation RS;
UE in the direct control range of control relaying under MR-BS control is sent to control relaying place with data, again by controlling relay forwarding to MR-BS;
The described cooperation division of labor comprises,
Cooperation RS judges can correctly listen to data, and the data recompile that listens to is sent to MR-BS, and cooperation RS judges and can not correctly monitor that cooperation RS sends NACK to MR-BS;
Control RS receives the data that described UE sends, and judgement can be correctly decoded, then with the data retransmission received to MR-BS, control RS can not be correctly decoded, and then sends NACK to MR-BS;
MR-BS receives that control RS transmits the data of described UE, and MR-BS judges the NACK that can not be correctly decoded or receive control RS, then receives the data that cooperation RS sends in the time at T; If MR-BS does not receive the data that cooperation RS sends at T in the time, then redefine cooperation RS.
2. described method according to claim 1, it is characterized in that, described MR-BS determines to provide the relay collection of partner services to comprise to UE, UE sends and intercepts signal, MR-BS sends lower relaying and the UE of information notice MR-BS control intercept signal, the definite relay collection that partner services is provided to UE of the measurement report to intercepting signal that MR-BS feeds back according to the lower relaying of described MR-BS control with UE.
3. described method according to claim 1, it is characterized in that, described cooperation RS further comprises after to the data recompile that listens to, cooperation RS judges the data after whether up channel has enough resource transmission recompiles, if enough resources arranged then send data behind the recompile to MR-BS, if do not have enough resources then send ACK to MR-BS.
4. described method according to claim 3 is characterized in that, described recompile comprises and adopts Equations of The Second Kind HARQ recompile or the 3rd class HARQ recompile.
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| WO2014075235A1 (en) * | 2012-11-14 | 2014-05-22 | 华为技术有限公司 | Cooperative communication method and related device and system |
| CN105611642A (en) * | 2016-01-08 | 2016-05-25 | 宇龙计算机通信科技(深圳)有限公司 | Data transmission configuration method, base station and user equipment |
| CN108809480B (en) * | 2017-04-28 | 2021-02-26 | 大唐移动通信设备有限公司 | Data receiving method and device |
| US10491301B2 (en) | 2017-10-27 | 2019-11-26 | King Fahd University Of Petroleum And Minerals | Multi-user mixed multi-hop relay network |
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| CN101296167A (en) * | 2007-04-23 | 2008-10-29 | 中兴通讯股份有限公司 | Method for requesting burst distribution transmission bandwidth for ascending mixed automatic re-transmission |
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| CN101296167A (en) * | 2007-04-23 | 2008-10-29 | 中兴通讯股份有限公司 | Method for requesting burst distribution transmission bandwidth for ascending mixed automatic re-transmission |
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