CN101790194A - Mixed automatic retransmission request method, device and system for relay uplink - Google Patents
Mixed automatic retransmission request method, device and system for relay uplink Download PDFInfo
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- CN101790194A CN101790194A CN200910077545A CN200910077545A CN101790194A CN 101790194 A CN101790194 A CN 101790194A CN 200910077545 A CN200910077545 A CN 200910077545A CN 200910077545 A CN200910077545 A CN 200910077545A CN 101790194 A CN101790194 A CN 101790194A
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Abstract
The invention discloses a mixed automatic retransmission request method for a relay uplink. In the method, a base station transmits NACK information and retransmission configuration information to a relay station when receiving an uplink data decoding error of the relay station, wherein the number of spaced subframes between the subframe of retransmission resources allocated in the retransmission configuration information and the subframe of the NACK information received by the relay station is not unique; after receiving the NACK information and the retransmission configuration information, the relay station retransmits uplink data according to instructions of the retransmission configuration information. At the same time, the invention further discloses a device and a system for realizing the above method. The HARQ method for the relay uplink and the device provided in the invention can improve the transmission flexibility of the relay link, avoid conflict about resource allocation between the relay link and an access link, and increase the resource utilizing rate as well.
Description
Technical field
The present invention relates to a kind of automatic repeat requests of mixing (HARQ, Hybrid Automatic Repeat request) method, Apparatus and system that is used for relay uplink (Relay Link).
Background technology
Relaying (Relay) technology has caused attention more and more widely as a kind of emerging technology, is regarded as the key technology of B3G (Beyond 3G)/4G.Because following radio communication or cellular system require to improve the network coverage, support the higher rate transmission, this has proposed new challenge to wireless communication technology.Following radio communication will adopt higher frequency, and the pathloss attenuation that causes thus is more serious.By relaying technique, traditional one hop link can be divided into a plurality of multi-hop links, because distance shortens, will greatly reduce path loss, help to improve transmission quality, enlarge communication range, thereby provide quicker better service for the user.Fig. 1 is a composition structural representation of introducing the network of relay station, as shown in Figure 1, introducing relay station (RS, Relay Station) in the network, link in the network between base station and relay station is called repeated link, link is called access link (AccessLink) between relay station and user (UE, User Equipment).
In wireless communication system, data need be carried out the feedback and the corresponding retransmission of HARQ process with transmission block (TB, Transmission Block) for unit.After receiving terminal receives signal, generate the ACK/NACK feedback according to the reception decoding situation of signal, as receive and correctly promptly generate ACK, receive and incorrectly promptly generate NACK, and ack/nack signal is fed back to transmitting terminal.Transmitting terminal is for further processing according to the feedback information that receives, if receive ACK, then continues the new data of transmission, then the data that take defeat is transferred to receiving terminal again by NACK if receive.
The re-transmission mode of data is generally the synchronous HARQ re-transmission in up link at present, the synchronous HARQ retransmission processes is meant after transmitting terminal receives the NACK feedback, after time interval set time of agreement, initiate the re-transmission of data, ascending HARQ process as the LTE system promptly adopts synchronous HARQ, receiving that the 4th subframe after the NACK feedback carry out data re-transmission, regular time is 4 subframes at interval here.
If adopt the synchronous HARQ method in relay uplink, then fixing sub-frame interval is necessary for the relay uplink Resources allocation and is used for retransmitting after RS carries out transmitting uplink data, the system that limited like this is to the distribution of relaying link circuit resource and the transmission flexibility of Relay Link, the resource allocation conflict that causes repeated link and access link is unfavorable for effective utilization of system resource.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of mixed automatic retransmission request method, Apparatus and system that is used for relay uplink, can improve the transmission flexibility of Relay Link, avoid the resource allocation conflict of repeated link and access link, improve resource utilization.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of mixed automatic retransmission request method that is used for relay uplink comprises:
When the base station receives relay station upstream data decoding error, send NACK message and retransmit configuration information to relay station, wherein, the introns frame number that receives between the subframe of described NACK message place of the subframe at the re-transmission resource place of being distributed in the described re-transmission configuration information and described relay station is not unique; And
Relay station receives the NACK message of upstream data and when retransmitting configuration information, retransmits described upstream data according to the indication of described re-transmission configuration information.
Further, also comprise one or more of following information in the described re-transmission configuration information: to the resource allocation that described upstream data retransmits, modulation coding mode, uplink transmission power control, antenna configurations is mixed automatic repeat requests HARQ process.
Further, relay station retransmits described upstream data according to the indication of described re-transmission configuration information, is specially:
Described relay station carries out coded modulation by the indication in the described re-transmission configuration information to described upstream data, and on the uplink retransmission resource that is disposed, by the transmitting power of described uplink transmission power control information indication, the antenna configurations of the indication of disposing is launched; When not comprising the indication to described information in retransmitting configuration information, relay station is according to waiting that the preceding once configuration indication that retransmits described upstream data correspondence retransmits.
A kind of automatic repeat requests device of mixing that is used for relay uplink comprises:
Receiving element is used to receive the relay station upstream data, receives decoding error, then trigger message generation unit as data;
Information generating unit is used to generate NACK message and retransmits configuration information, and wherein, the introns frame number that the subframe at the re-transmission resource place of being distributed in the described re-transmission configuration information and described relay station receive between the subframe of described NACK message place is not unique; And
Transmitting element is used for sending NACK message and retransmitting configuration information to relay station.
Further, also comprise one or more of following information in the described re-transmission configuration information: to the resource allocation that described upstream data retransmits, modulation coding mode, uplink transmission power control, antenna configurations is mixed automatic repeat requests HARQ process.
A kind of automatic repeat requests device of mixing that is used for relay uplink comprises:
Receiving element, be used to receive the NACK message of upstream data and retransmit configuration information, wherein, the introns frame number that receives between the subframe of described NACK message place of the subframe at the re-transmission resource place of being distributed in the described re-transmission configuration information and described relay station is not unique; And
Retransmission unit is used for retransmitting described upstream data according to the indication of described re-transmission configuration information.
Further, also comprise one or more of following information in the described re-transmission configuration information: to the resource allocation that described upstream data retransmits, modulation coding mode, uplink transmission power control, antenna configurations is mixed automatic repeat requests HARQ process.
Further, described retransmission unit retransmits described upstream data according to the indication of described re-transmission configuration information, is specially:
Described retransmission unit is carried out coded modulation by the indication in the described re-transmission configuration information to described upstream data, on the uplink retransmission resource that is disposed, by the transmitting power of described uplink transmission power control information indication, the antenna configurations of the indication of disposing is launched; When in retransmitting configuration information, not comprising the indication to described information, according to waiting that the preceding once configuration indication that retransmits described upstream data correspondence retransmits.
A kind of system that is used for the automatic repeat requests of mixing of relay uplink comprises base station and relay station, and described base station comprises:
Receiving element is used to receive the relay station upstream data, receives decoding error, then trigger message generation unit as data;
Information generating unit is used to generate NACK message and retransmits configuration information, and wherein, the introns frame number that the subframe at the re-transmission resource place of being distributed in the described re-transmission configuration information and described relay station receive between the subframe of described NACK message place is not unique; And
Transmitting element is used for sending NACK message and retransmitting configuration information to relay station;
Described relay station comprises:
Receiving element is used to receive the NACK message of upstream data and retransmits configuration information; And
Retransmission unit is used for retransmitting described upstream data according to the indication of described re-transmission configuration information.
Further, also comprise one or more of following information in the described re-transmission configuration information: to the resource allocation that described upstream data retransmits, modulation coding mode, uplink transmission power control, antenna configurations is mixed automatic repeat requests HARQ process;
Described retransmission unit retransmits described upstream data according to the indication of described re-transmission configuration information, is specially:
Described retransmission unit is carried out coded modulation by the indication in the described re-transmission configuration information to described upstream data, on the uplink retransmission resource that is disposed, by the transmitting power of described uplink transmission power control information indication, the antenna configurations of the indication of disposing is launched.When in retransmitting configuration information, not comprising the indication to described information, according to waiting that the preceding once configuration indication that retransmits described upstream data correspondence retransmits.
When the present invention retransmits indication at the upstream data to repeated link, the uplink retransmission resource of being distributed is not limited to relay station and receives on the subframe of unique stator frame period after the NACK message, the transmission flexibility of Relay Link can be improved in the base station by the asynchronous re-transmission of dispatching of relays link ascending HARQ process, avoid conflicting of repeated link and access link resource distribution, improved resource utilization.
Description of drawings
Fig. 1 is a composition structural representation of introducing the network of relay station;
Fig. 2 is the mixed automatic retransmission request method flow chart that the present invention is used for relay uplink;
Fig. 3 is that the embodiment of the invention one retransmits configuration schematic diagram;
Fig. 4 is that the embodiment of the invention two retransmits configuration schematic diagram;
Fig. 5 is an embodiment of the invention retransmission configuration schematic diagram;
Fig. 6 is the composition structural representation of a kind of embodiment of device of the present invention's automatic repeat requests of mixing of being used for relay uplink;
Fig. 7 is the composition structural representation of the another kind of device embodiment of the present invention's automatic repeat requests of mixing of being used for relay uplink;
Fig. 8 is the composition structural representation that the present invention is used for the automatic repeat requests of the mixing system of relay uplink.
Embodiment
Basic thought of the present invention is: when the base station retransmits indication at the upstream data to repeated link, the uplink retransmission resource of being distributed is not limited to relay station and receives on the subframe of unique stator frame period after the NACK message, the transmission flexibility of RelayLink can be improved in the base station by the asynchronous re-transmission of dispatching of relays link ascending HARQ process, avoid conflicting of repeated link and access link resource distribution, improved resource utilization.
For making the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
Fig. 2 is the mixed automatic retransmission request method flow chart that the present invention is used for relay uplink, and as shown in Figure 2, the mixed automatic retransmission request method that the present invention is used for relay uplink may further comprise the steps:
Step 201: the base station receives upstream data, and receives decoding error.
The base station receives the upstream data of relay station, and received upstream data reception decoding error, and here, upstream data comprises business datum and/or control data.
Step 202: the base station sends NACK message and retransmits configuration information to relay station, and wherein, the introns frame number that the subframe at the re-transmission resource place of being distributed in the described re-transmission configuration information and described relay station receive between the subframe of described NACK message place is not unique.
When the base station receives RS upstream data mistake, send the NACK feedback message to relay station, the corresponding upstream data of notice relay station receives mistake.In the synchronous HARQ method, after relay station receives NACK feedback message and corresponding re-transmission configuration indication, will be after receiving the NACK feedback message retransmit corresponding upstream data on the subframe of certain stator frame period, the sub-frame interval of data retransmission place subframe and received NACK message place subframe is unique fixing.The asynchronous HARQ method that the present invention proposes after relay station receives NACK message and corresponding re-transmission configuration information, retransmits upstream data on the re-transmission resource of distributing according to retransmitting the subframe of indicating in the configuration information.Re-transmission resource place subframe of distributing and the sub-frame interval between NACK message are not unique fixing.Retransmit one or more that also comprise following information in the configuration information: to the resource allocation that described upstream data retransmits, modulation coding mode, uplink transmission power control, antenna configurations, HARQ process.
Step 203: relay station receives the NACK feedback message of upstream data and retransmits configuration information, retransmits described upstream data according to the indication of described re-transmission configuration information.
After relay station receives NACK message, determine corresponding transmitting uplink data mistake, need to retransmit this upstream data.Owing to adopt asynchronous re-transmission mode, relay station is determined the re-transmission resource place subframe of being distributed according to corresponding indication in the described re-transmission configuration information, and according to retransmitting in the configuration information relevant configuration indication that retransmits is retransmitted corresponding upstream data on corresponding subframe.
Because wireless propagation environment has time variation, the base station can reconfigure the modulation coding mode of indication uplink data retransmission and transmitting power etc. according to current channel condition, to realize effective re-transmission of upstream data better.Therefore retransmit modulation coding mode, the uplink transmission power control information that can also comprise described upstream data in the configuration information, antenna configurations, information such as HARQ process.If retransmit the code modulation mode that comprises in the configuration indication information described uplink data retransmission, the uplink transmission power control information, the indication of antenna configurations, then RS carries out the recompile modulation according to retransmitting the configuration indication to upstream data, on the uplink retransmission resource of being distributed, launch by the transmitting power and the respective antenna configuration of described uplink transmission power control information indication.Otherwise RS treats configuration same when retransmitting the upstream data employing with last transmission and retransmits.
Embodiment one
Fig. 3 is the re-transmission configuration schematic diagram of the embodiment of the invention one, as shown in Figure 3, RS receives the NACK message of base station in the n subframe, and be Relay Link sub-frame of uplink according to system configuration n+4 subframe, then base station indication in retransmitting configuration information will retransmit resource distribution in the n+4 subframe, RS then according to retransmit configuration indicate will be to be retransmitted data retransmit to the base station in the n+4 subframe.When RS when the m subframe is received NACK message, be Relay Link sub-frame of uplink according to system configuration m+5 subframe, then base station indication RS in retransmitting configuration information retransmits in the m+5 subframe.
Embodiment two
It may be a plurality of UE services simultaneously that the present invention also has following application scenarios: RS, and Relay Link resource-constrained, then can occur when a plurality of upstream datas all exist re-transmission to require, the base station can retransmit the higher upstream data configuration preference of priority according to relevant configuration, type of service and qos requirement difference as the data that UE sends of service under the RS, then the base station can configuration preference retransmit the high upstream data of qos requirement, also can consider in addition the resource allocation fairness and preferential configuration retransmits certain upstream data, thereby provide service more flexibly and effectively with asynchronous HARQ repeating method at up Relay Link.Fig. 4 is that the embodiment of the invention two retransmits configuration schematic diagram, as shown in Figure 4, RS receives NACK message to the upstream data of data A, data B respectively in the n subframe, and be subject to factors such as repeated link resource, can't dispose RS retransmits two data simultaneously in the up n+4 subframe of repeated link, then the base station disposes RS at n+4 subframe data retransmission B according to certain dispatching method, at n+5 subframe data retransmission A, RS is according to retransmitting the configuration information indication at n+4 subframe uplink data retransmission B, at n+5 subframe uplink data retransmission A.
Embodiment three
Fig. 5 is an embodiment of the invention retransmission configuration schematic diagram, as shown in Figure 5, according to configuration to the repeated link ascending resource, the present invention also has following application scenarios: RS in the n subframe, and the n+1 subframe is received the base station respectively to data A, the NACK of data B feedback, and the base station is according to repeated link resource distribution situation, to data A, data B is configured in the n+5 subframe and retransmits, by retransmitting configuration information notice RS.RS is according to the indication that retransmits configuration information, and with data A, data B retransmits on the re-transmission resource of being distributed in the n+5 subframe.
In the method for previous embodiment of the present invention, relay station has improved the transmission flexibility of Relay Link, has avoided conflicting of repeated link and access link resource distribution, has improved resource utilization.
Device embodiment one
Fig. 6 is the composition structural representation of a kind of embodiment of device of the present invention's automatic repeat requests of mixing of being used for relay uplink, as shown in Figure 6, the device of present embodiment comprises receiving element 60, information generating unit 61 and transmitting element 62, wherein, receiving element 60 is used to receive the relay station upstream data, receive decoding error as data, then the trigger message generation unit 61; Information generating unit 61 is used to generate NACK message and retransmits configuration information, and wherein, the introns frame number that the subframe at the re-transmission resource place of being distributed in the described re-transmission configuration information and described relay station receive between the subframe of described NACK message place is not unique; Retransmit one or more that also comprise following information in the configuration information: to the resource allocation that described upstream data retransmits, modulation coding mode, uplink transmission power control, antenna configurations, HARQ process.Transmitting element 62 is used for sending NACK message and retransmitting configuration information to relay station.
The automatic repeat requests device of the mixing that is used for relay uplink of present embodiment is applicable to the base station side of communicating by letter with relay station.Those skilled in the art are to be understood that, the automatic repeat requests device of the mixing that is used for relay uplink of present embodiment is for realizing that the mixed automatic retransmission request method that is used for relay uplink shown in Figure 2 designs, the realization function of the each processing unit in the device shown in Figure 6 can be understood with reference to the associated description in the method shown in Figure 2, repeats no more here.The function of each unit of the automatic repeat requests device of the mixing that is used for relay uplink of present embodiment can realize by the program that runs on the processor, also can realize by concrete logical circuit.
Device embodiment two
Fig. 7 is the composition structural representation of the another kind of device embodiment of the present invention's automatic repeat requests of mixing of being used for relay uplink, as shown in Figure 7, the device of present embodiment comprises receiving element 70 and retransmission unit 71, wherein, receiving element 70 is used to receive NACK feedback message and the re-transmission configuration information to upstream data, wherein, the introns frame number that receives between the subframe of described NACK message place of the subframe at the re-transmission resource place of being distributed in the described re-transmission configuration information and described relay station is not unique; Retransmit one or more that also comprise following information in the configuration information: to the resource allocation that described upstream data retransmits, modulation coding mode, uplink transmission power control, antenna configurations, HARQ process.
Retransmission unit 71 is used for retransmitting described upstream data according to the indication of described re-transmission configuration information, if retransmit the code modulation mode that comprises in the configuration indication information described uplink data retransmission, the uplink transmission power control information, the indication of antenna configurations, then RS carries out the recompile modulation according to retransmitting the configuration indication to upstream data, on the uplink retransmission resource of being distributed, launch by the transmitting power and the respective antenna configuration of described uplink transmission power control information indication.Otherwise RS treats configuration same when retransmitting the upstream data employing with last transmission and retransmits.The automatic repeat requests device of the mixing that is used for relay uplink of present embodiment is applicable to relay station.Those skilled in the art are to be understood that, the automatic repeat requests device of the mixing that is used for relay uplink of present embodiment is for realizing that the mixed automatic retransmission request method that is used for relay uplink shown in Figure 2 designs, the realization function of the each processing unit in the device shown in Figure 7 can be understood with reference to the associated description in the method shown in Figure 2, repeats no more here.Originally the function of executing each unit of the automatic repeat requests device of the mixing that is used for relay uplink of example can realize by the program that runs on the processor, also can realize by concrete logical circuit.
Fig. 8 is the composition structural representation that the present invention is used for the automatic repeat requests of the mixing system of relay uplink, as shown in Figure 8, the automatic repeat requests of the mixing system that the present invention is used for relay uplink comprises base station and relay station, wherein, the base station comprises receiving element 80, information generating unit 81 and transmitting element 82, wherein, the structure of receiving element 80, information generating unit 81 and transmitting element 82 and function be identical with receiving element 60, information generating unit 61 and transmitting element 62 shown in Figure 6 respectively, repeats no more here.Relay station comprises receiving element 83 and retransmission unit 84, and wherein, the structure of receiving element 83 and retransmission unit 84 and function be identical with receiving element 70 shown in Figure 7 and retransmission unit 71 respectively, repeats no more here.
The Apparatus and system of previous embodiment of the present invention improved the transmission flexibility of Relay Link, avoided conflicting of repeated link and access link resource distribution, improved resource utilization.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1. a mixed automatic retransmission request method that is used for relay uplink is characterized in that, comprising:
When the base station receives relay station upstream data decoding error, send NACK message and retransmit configuration information to relay station, wherein, the introns frame number that receives between the subframe of described NACK message place of the subframe at the re-transmission resource place of being distributed in the described re-transmission configuration information and described relay station is not unique; And
Relay station receives the NACK message of upstream data and when retransmitting configuration information, retransmits described upstream data according to the indication of described re-transmission configuration information.
2. method according to claim 1, it is characterized in that, also comprise one or more of following information in the described re-transmission configuration information: the resource allocation that described upstream data is retransmitted, modulation coding mode, uplink transmission power control, antenna configurations is mixed automatic repeat requests HARQ process.
3. method according to claim 2 is characterized in that, relay station retransmits described upstream data according to the indication of described re-transmission configuration information, is specially:
Described relay station carries out coded modulation by the indication in the described re-transmission configuration information to described upstream data, and on the uplink retransmission resource that is disposed, by the transmitting power of described uplink transmission power control information indication, the antenna configurations of the indication of disposing is launched; When not comprising the indication to described information in retransmitting configuration information, relay station is according to waiting that the preceding once configuration indication that retransmits described upstream data correspondence retransmits.
4. the automatic repeat requests device of mixing that is used for relay uplink is characterized in that, comprising:
Receiving element is used to receive the relay station upstream data, receives decoding error, then trigger message generation unit as data;
Information generating unit is used to generate NACK message and retransmits configuration information, and wherein, the introns frame number that the subframe at the re-transmission resource place of being distributed in the described re-transmission configuration information and described relay station receive between the subframe of described NACK message place is not unique; And
Transmitting element is used for sending NACK message and retransmitting configuration information to relay station.
5. device according to claim 4, it is characterized in that, also comprise one or more of following information in the described re-transmission configuration information: the resource allocation that described upstream data is retransmitted, modulation coding mode, uplink transmission power control, antenna configurations is mixed automatic repeat requests HARQ process.
6. the automatic repeat requests device of mixing that is used for relay uplink is characterized in that, comprising:
Receiving element, be used to receive the NACK message of upstream data and retransmit configuration information, wherein, the introns frame number that receives between the subframe of described NACK message place of the subframe at the re-transmission resource place of being distributed in the described re-transmission configuration information and described relay station is not unique; And
Retransmission unit is used for retransmitting described upstream data according to the indication of described re-transmission configuration information.
7. device according to claim 6, it is characterized in that, also comprise one or more of following information in the described re-transmission configuration information: the resource allocation that described upstream data is retransmitted, modulation coding mode, uplink transmission power control, antenna configurations is mixed automatic repeat requests HARQ process.
8. device according to claim 7 is characterized in that, described retransmission unit retransmits described upstream data according to the indication of described re-transmission configuration information, is specially:
Described retransmission unit is carried out coded modulation by the indication in the described re-transmission configuration information to described upstream data, on the uplink retransmission resource that is disposed, by the transmitting power of described uplink transmission power control information indication, the antenna configurations of the indication of disposing is launched; When in retransmitting configuration information, not comprising the indication to described information, according to waiting that the preceding once configuration indication that retransmits described upstream data correspondence retransmits.
9. a system that is used for the automatic repeat requests of mixing of relay uplink comprises base station and relay station, it is characterized in that described base station comprises:
Receiving element is used to receive the relay station upstream data, receives decoding error, then trigger message generation unit as data;
Information generating unit is used to generate NACK message and retransmits configuration information, and wherein, the introns frame number that the subframe at the re-transmission resource place of being distributed in the described re-transmission configuration information and described relay station receive between the subframe of described NACK message place is not unique; And
Transmitting element is used for sending NACK message and retransmitting configuration information to relay station;
Described relay station comprises:
Receiving element is used to receive the NACK message of upstream data and retransmits configuration information; And
Retransmission unit is used for retransmitting described upstream data according to the indication of described re-transmission configuration information.
10. system according to claim 9, it is characterized in that, also comprise one or more of following information in the described re-transmission configuration information: the resource allocation that described upstream data is retransmitted, modulation coding mode, uplink transmission power control, antenna configurations is mixed automatic repeat requests HARQ process;
Described retransmission unit retransmits described upstream data according to the indication of described re-transmission configuration information, is specially:
Described retransmission unit is carried out coded modulation by the indication in the described re-transmission configuration information to described upstream data, on the uplink retransmission resource that is disposed, by the transmitting power of described uplink transmission power control information indication, the antenna configurations of the indication of disposing is launched.When in retransmitting configuration information, not comprising the indication to described information, according to waiting that the preceding once configuration indication that retransmits described upstream data correspondence retransmits.
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| WO2016070561A1 (en) * | 2014-11-07 | 2016-05-12 | 中兴通讯股份有限公司 | Data transmission processing method and device |
| WO2018027588A1 (en) * | 2016-08-09 | 2018-02-15 | 华为技术有限公司 | Data transmission method and communication apparatus |
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