CN101807982B - HARQ method for one-way/two-way relay - Google Patents
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Abstract
The invention relates to an HARQ method for a one-way / two-way relay, wherein the method for the one-way relay comprises the following steps that: the data is transmitted to a relay station by a node B according to a predetermined redundancy version RV at slot time 1, at the same time, from the node B, a client monitors the transmitted data, the relay station transmits the data at slot time 2 to the client according to another redundancy version different from the predetermined redundancy version, and thus on the basis of the received data and the monitored data, the client recovers the data transmitted by the node B.
Description
Technical field
The present invention relates to be applied to h-arq (HARQ) method of one-way/two-way relaying.More particularly, the present invention relates to a kind of improvement HARQ method and system for one-way/two-way relaying, wherein, relay station adopts and is different from the redundancy versions (RV) that receives data and carrys out forwarding data, thereby further improves transmission reliability.
Background technology
H-arq (HARQ) is a kind of for improve the mechanism of transmission reliability in radio communication.Fig. 1 illustrates the HARQ method of N channel in the conventional cellular communication system pattern that " stops waiting for (Stop-And-Wait) ".In the HARQ method shown in Fig. 1, Node B (NB) first according to redundancy versions (redundancy version) RV0 by data P1, P2 and P3 (, (P1 RV0), (P2RV0) and (P3 RV0)) send to user side (UE).If user side receives correct transmission data, ack signal is sent it back Node B by user side, if user side does not receive correct transmission data, NAK signal is sent it back Node B by user side.For example, if for data P1 and P3, what Node B received is ack signal, and Node B sends new data P4 and P5 (, (P4 RV0) and (P5 RV0)) by continuing according to redundancy versions RV0.If for data P2, what Node B received is NAK signal, and the redundancy versions RV1 according to new is resend data P2 (, (P2 RV1)) by Node B.By that analogy, thus complete the transmission of all data.
One-way/two-way relaying is all the technology for improvement of coverage and user throughput.Fig. 2 and Fig. 3 illustrate respectively and in prior art, apply the one-way junction system of HARQ and the block diagram of bidirectional relay system.
In the block diagram of the one-way junction system of the application HARQ shown in Fig. 2, at time slot 1, the data P1 processing according to RV0 (, (P1 RV0)) is sent to relay station 20 by Node B 10, meanwhile, user side 30 listens to data (P1 RV0) from Node B 10.Then, at time slot 2, the data of processing according to RV0 (P1 RV0) are forwarded to user side 30 by relay station 20, thereby user side 30 recovers the data P1 sending.In addition, can carry out the transfer of data from user side 30 to Node B 10 according to similar HARQ mode.
In the block diagram of the bidirectional relay system of the application HARQ shown in Fig. 3, at time slot 1, the data P1 processing according to RV0 (, (P1 RV0)) is sent to relay station 50 by Node B 40, meanwhile, user side 60 listens to data (P1 RV0) from Node B 40.At time slot 2, the data P2 processing according to RV0 (, (P2 RV0)) is sent to relay station 50 by user side 60, and meanwhile, Node B 40 listens to data (P2 RV0) from user side 60.Then, at time slot 3, relay station 50 carries out XOR according to RV0 by the data that receive, and the result of XOR ((P1 RV0) xor (P2 RV0)) is sent to respectively to Node B 40 and user side 60, thereby Node B 40 and user side 60 recover data separately.
Can find out by above description, traditional HARQ being applied in the technical scheme of one-way/two-way relaying, same redundancy versions due to what adopt, so HARQ only provides temporal scalability gain, and do not relate to any network code processing, this makes transmission reliability be subject to certain limitation, therefore, is necessary to propose a kind of HARQ method and system for one-way/two-way relaying that can further strengthen transmission reliability.
Summary of the invention
The object of the present invention is to provide a kind of HARQ method and system for one-way/two-way relaying, wherein, relay station adopts the original processing of different redundancy version by the data that forward, thereby has introduced cooperative coding gain, has further improved the reliability of transfer of data.
According to an aspect of the present invention, provide a kind of HARQ method for one-way junction, described method comprises: according to predetermined redundancy versions RV, data are sent to relay station at time slot 1 by Node B, meanwhile, user side listens to the data of transmission from Node B; And forward the data to user side at time slot 2 according to another redundancy versions that is different from described predetermined redundancy versions by relay station, thereby the data based on receiving carry out with the data that listen to the data that recovery nodes B sends by user side.
According to predetermined redundancy versions, data are sent to relay station at time slot 3 by user side, meanwhile, Node B listens to the data of transmission from user side; And forward the data to Node B at time slot 4 according to another redundancy versions that is different from described predetermined redundancy versions by relay station, thereby the data based on receiving recover with the data that listen to the data that user side sends by Node B.
Described predetermined redundancy versions is RV0, and described another redundancy versions is RV1.
Described predetermined redundancy versions is RV1, and described another redundancy versions is RV0.
Described predetermined redundancy versions is any one in RV0, RV2, RV4...RV (2n), and described another redundancy versions is the respective redundant version in RV 1, RV3, RV5...RV (2n-1), and wherein, n is more than or equal to 0 integer.
In the HARQ of type-iii mode, described predetermined redundancy versions is any one in RV1, RV3, RV5...RV (2n-1), described another redundancy versions is the respective redundant version in RV0, RV2, RV4...RV (2n), and wherein, n is more than or equal to 0 integer.
According to the high face of the opposing party of the present invention, a kind of HARQ method for bi-directional relaying is provided, described method comprises: according to predetermined redundancy versions RV, data are sent to relay station at time slot 1 by Node B, meanwhile, user side listens to the data of transmission from Node B; According to predetermined redundancy versions, data are sent to relay station at time slot 2 by user side, meanwhile, Node B listens to the data of transmission from user side; And according to another redundancy versions that is different from described predetermined redundancy versions, the XOR result of data is sent to respectively to Node B and user side at time slot 3 by relay station, thereby the data based on receiving are recovered data separately with the data that listen to by Node B and user side.
According to a further aspect in the invention, the one-way junction system of a kind of HARQ of application is provided, it comprises: Node B, relay station and user side, wherein, described relay station by the data retransmission from Node B to user side, described relay system is characterised in that: Node B sends to relay station according to predetermined redundancy versions RV by data at time slot 1, and meanwhile, user side listens to the data of transmission from Node B; And relay station forwards the data to user side at time slot 2 according to another redundancy versions that is different from described predetermined redundancy versions, thereby the data based on receiving and the data that listen to are carried out the data that recovery nodes B sends by user side.
According to a further aspect in the invention, the bidirectional relay system of a kind of HARQ of application is provided, it comprises: Node B, relay station and user side, wherein, the XOR result of the data from Node B and user side is sent to respectively Node B and user side by described relay station, described relay system is characterised in that: Node B sends to relay station according to predetermined redundancy versions RV by data at time slot 1, and meanwhile, user side listens to the data of transmission from Node B; User side sends to relay station according to predetermined redundancy versions by data at time slot 2, and meanwhile, Node B listens to the data of transmission from user side; And relay station respectively sends to Node B and user side according to another redundancy versions that is different from described predetermined redundancy versions by the XOR result of data at time slot 3, thereby the data based on receiving and the data that listen to are recovered data separately by Node B and user side.
Accompanying drawing explanation
By the description to embodiment of carrying out below in conjunction with accompanying drawing, above-mentioned and/or other objects of the present invention and advantage will become apparent, wherein:
Fig. 1 illustrates the HARQ method of N channel in the conventional cellular communication system pattern that " stops waiting for (Stop-And-Wait) ";
Fig. 2 illustrates the block diagram of the one-way junction system of applying HARQ in prior art;
Fig. 3 illustrates the block diagram of applying the bidirectional relay system of HARQ in prior art;
Fig. 4 illustrates the block diagram of the one-way junction system of applying according to an exemplary embodiment of the present invention HARQ;
Fig. 5 illustrates according to an exemplary embodiment of the present invention the flow chart for the HARQ method of one-way junction;
Fig. 6 illustrates the block diagram of the bidirectional relay system of applying according to an exemplary embodiment of the present invention HARQ; And
Fig. 7 illustrates according to an exemplary embodiment of the present invention the flow chart for the HARQ method of bi-directional relaying.
Embodiment
Now will be in detail with reference to embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein, identical label refers to identical parts all the time.Below will be by described embodiment is described with reference to accompanying drawing, to explain the present invention.
Fig. 4 illustrates the block diagram of the one-way junction system of applying according to an exemplary embodiment of the present invention HARQ, wherein, Node B 100 shown in Fig. 4, relay station 200 and user side 300 are similar with the Node B 10 shown in Fig. 2, relay station 20 and user side 30 respectively, just relay station 200 adopts the RV different from received data to carry out deal with data, thereby forwards.
The method that according to an exemplary embodiment of the present invention HARQ is applied to one-way junction is described below with reference to Fig. 4 and Fig. 5.
Fig. 5 illustrates according to an exemplary embodiment of the present invention the flow chart for the HARQ method of one-way junction.With reference to Fig. 5, at step S100, Node B 100 will be according to specific redundancy version at time slot 1, for example, the data P1 (, (P1 RV0)) that RV0 processes sends to relay station 200, meanwhile, user side 300 listens to data (P1 RV0) from Node B 100.Then, at step S200, relay station 200 at time slot 2 by another redundancy versions according to being different from the data that receive, for example, the data (P1 RV1) that RV1 processes are forwarded to user side 300, thereby the data (P1 RV0) of user side 300 based on listening to and the data (P1 RV1) that receive are recovered data P1.As another example, Node B 100 can adopt RV1 in step S 100, and relay station 200 adopts RV0 in step S200.Above-mentioned redundancy versions RV0 and RV1 are only as example, the present invention are not played to the restriction going up in all senses, and any different redundancy versions all can be applicable to the present invention.For example, Node B 100 can adopt any one in redundancy versions RV0, RV2, RV4...RV (2n) to send data in step S100, in this case, relay station 200 adopts the respective redundant version in RV1, RV3, RV5...RV (2n-1) to carry out forwarding data in step S200, wherein, n is more than or equal to 0 integer.As optimal way, in above-mentioned example, can select different redundancy versions for the HARQ mode of type-iii especially, now, Node B 100 can adopt any one in redundancy versions RV1, RV3, RV5...RV (2n-1) to send data in step S100, and relay station 200 adopts the respective redundant version in RV0, RV2, RV4...RV (2n) to carry out forwarding data in step S200.In addition,, as example, can carry out the transfer of data from user side 300 to Node B 100 according to similar HARQ mode.Particularly, at step S300, user side 300 will be according to specific redundancy version at time slot 3, for example, the data P2 (, (P2RV0)) that RV0 processes sends to relay station 200, meanwhile, Node B 100 listens to data (P2 RV0) from user side 300.Then, at step S400, relay station 200 at time slot 4 by another redundancy versions according to being different from the data that receive, for example, the data (P2RV1) that RV1 processes are forwarded to Node B 100, thereby the data (P2 RV0) of Node B 100 based on listening to and the data (P2 RV1) that receive are recovered data P2.As another example, user side 300 can adopt RV1 in step S300, and relay station 200 adopts RV0 in step S400.Above-mentioned redundancy versions RV0 and RV1 are only as example, the present invention are not played to the restriction going up in all senses, and any different redundancy versions all can be applicable to the present invention.For example, user side 300 can adopt any one in redundancy versions RV0, RV2, RV4...RV (2n) to send data in step S300, in this case, relay station 200 adopts the respective redundant version in RV1, RV3, RV5...RV (2n-1) to carry out forwarding data in step S400, wherein, n is more than or equal to 0 integer.As optimal way, in above-mentioned example, can select different redundancy versions for the HARQ mode of type-iii especially, now, user side 300 can adopt any one in redundancy versions RV1, RV3, RV5...RV (2n-1) to send data in step S300, and relay station 200 adopts the respective redundant version in RV0, RV2, RV4...RV (2n) to carry out forwarding data in step S400.
Fig. 6 illustrates the block diagram of the bidirectional relay system of applying according to an exemplary embodiment of the present invention HARQ, wherein, Node B 400 shown in Fig. 6, relay station 500 and user side 600 are similar with the Node B 40 shown in Fig. 3, relay station 50 and user side 60 respectively, just relay station 500 adopts the RV different from received data to carry out deal with data, thereby forwards.
The method that according to an exemplary embodiment of the present invention HARQ is applied to bi-directional relaying is described below with reference to Fig. 6 and Fig. 7.
Fig. 7 illustrates according to an exemplary embodiment of the present invention the flow chart for the HARQ method of bi-directional relaying.With reference to Fig. 7, at step S10, Node B 400 will be according to specific redundancy version at time slot 1, for example, the data P1 (, (P1 RV1)) that RV1 processes sends to relay station 500, meanwhile, user side 600 listens to data (P1 RV1) from Node B 400.At step S20, user side 600 sends to relay station 500 at time slot 2 by the data P2 processing according to RV1 (, (P2 RV1)), and meanwhile, Node B 400 listens to data (P2 RV1) from user side 600.Then, at step S30, relay station 500 at time slot 3 according to another redundancy versions that is different from the data that receive, for example, the data that receive are carried out XOR by RV0, and the result of XOR ((P1 RV0) xor (P2 RV0)) is sent to respectively to Node B 400 and user side 600, thereby Node B 400 and user side 600 recover data separately.As another example, Node B 400 can adopt RV0 in step S10, and user side 600 can adopt RV0 in step S20, and relay station 500 adopts RV1 in step S30.Above-mentioned redundancy versions RV0 and RV1 are only as example, the present invention are not played to the restriction going up in all senses, and any different redundancy versions all can be applicable to the present invention.For example, Node B 400 and user side 600 can adopt respectively any one in redundancy versions RV0, RV2, RV4...RV (2n) to send data in step S10 and S20, in this case, relay station 500 adopts the respective redundant version in RV1, RV3, RV5...RV (2n-1) to send the XOR result of data in step S30, wherein, n is more than or equal to 0 integer.As optimal way, in above-mentioned example, can select different redundancy versions for the HARQ mode of type-iii especially, now, Node B 400 and user side 600 can adopt respectively any one in redundancy versions RV1, RV3, RV5...RV (2n-1) to send data in step S10 and S20, and relay station 500 adopts respective redundant version in RV0, RV2, RV4...RV (2n) to send the XOR result of data in step S30.
At the HARQ method and system for one-way/two-way relaying according to the present invention, relay station adopts the original processing of different redundancy version by the data that forward, thereby has introduced cooperative coding gain, has further improved the reliability of transfer of data.
Although illustrated and described some embodiments of the present invention, but those skilled in the art will be appreciated that: without departing from the principles and spirit of the present invention, can change these embodiments, wherein, scope of the present invention limits in claim and equivalent thereof.
Claims (22)
1. for a HARQ method for one-way junction, described method comprises:
According to predetermined redundancy versions RV, data are sent to relay station at time slot 1 by Node B, meanwhile, user side listens to the data of transmission from Node B; And
Forward the data to user side at time slot 2 according to another redundancy versions that is different from described predetermined redundancy versions by relay station, thereby the data based on receiving carry out with the data that listen to the data that recovery nodes B sends by user side.
2. the method for claim 1, also comprises:
According to predetermined redundancy versions, data are sent to relay station at time slot 3 by user side, meanwhile, Node B listens to the data of transmission from user side; And
Forward the data to Node B at time slot 4 according to another redundancy versions that is different from described predetermined redundancy versions by relay station, thereby the data based on receiving recover with the data that listen to the data that user side sends by Node B.
3. the method for claim 1, wherein described predetermined redundancy versions is RV0, and described another superfluous She's version is RV1.
4. the method for claim 1, wherein described predetermined redundancy versions is RV1, and described another redundancy versions is RV0.
5. the method for claim 1, wherein, described predetermined superfluous She's version is any one in RV0, RV2, RV4...RV (2n), described another redundancy versions is the respective redundant version in RV1, RV3, RV5...RV (2n-1), wherein, n is more than or equal to 0 integer.
6. the method for claim 1, wherein, in the HARQ of type-iii mode, described predetermined redundancy versions is any one in RV1, RV3, RV5...RV (2n-1), described another redundancy versions is the respective redundant version in RV0, RV2, RV4...RV (2n), wherein, n is more than or equal to 0 integer.
7. for a HARQ method for bi-directional relaying, described method comprises:
According to predetermined redundancy versions RV, data are sent to relay station at time slot 1 by Node B, meanwhile, user side listens to the data of transmission from Node B;
According to predetermined redundancy versions, data are sent to relay station at time slot 2 by user side, meanwhile, Node B listens to the data of transmission from user side; And
According to another redundancy versions that is different from described predetermined redundancy versions, the XOR result of data is sent to respectively to Node B and user side at time slot 3 by relay station, thereby the data based on receiving are recovered data separately with the data that listen to by Node B and user side.
8. method as claimed in claim 7, wherein, described predetermined redundancy versions is RV0, described another redundancy versions is RV1.
9. method as claimed in claim 7, wherein, described predetermined redundancy versions is RV1, described another redundancy versions is RV0.
10. method as claimed in claim 7, wherein, described predetermined redundancy versions is any one in RV0, RV2, RV4...RV (2n), described another redundancy versions is the respective redundant version in RV1, RV3, RV5...RV (2n-1), wherein, n is more than or equal to 0 integer.
11. methods as claimed in claim 7, wherein, in the HARQ of type-iii mode, described predetermined redundancy versions is any one in RV1, RV3, RV5...RV (2n-1), described another superfluous She's version is the respective redundant version in RV0, RV2, RV4...RV (2n), wherein, n is more than or equal to 0 integer.
Apply the one-way junction system of HARQ for 12. 1 kinds, it comprises: Node B, relay station and user side, and wherein, described relay station is by the data retransmission from Node B to user side, and described relay system is characterised in that:
Node B sends to relay station according to predetermined redundancy versions RV by data at time slot 1, and meanwhile, user side listens to the data of transmission from Node B; And
Relay station forwards the data to user side at time slot 2 according to another redundancy versions that is different from described predetermined redundancy versions, thereby the data based on receiving carry out with the data that listen to the data that recovery nodes B sends by user side.
13. systems as claimed in claim 12, wherein,
User side sends to relay station according to predetermined redundancy versions by data at time slot 3, and meanwhile, Node B listens to the data of transmission from user side; And
Relay station forwards the data to Node B at time slot 4 according to another redundancy versions that is different from described predetermined redundancy versions, thereby the data based on receiving recover with the data that listen to the data that user side sends by Node B.
14. systems as claimed in claim 12, wherein, described predetermined redundancy versions is RV0, described another redundancy versions is RV1.
15. systems as claimed in claim 12, wherein, described predetermined redundancy versions is RV1, described another redundancy versions is RV0.
16. systems as claimed in claim 12, wherein, described predetermined redundancy versions is any one in RV0, RV2, RV4...RV (2n), described another redundancy versions is the respective redundant version in RV1, RV3, RV5...RV (2n-1), wherein, n is more than or equal to 0 integer.
17. systems as claimed in claim 12, wherein, in the HARQ of type-iii mode, described predetermined redundancy versions is any one in RV1, RV3, RV5...RV (2n-1), described another redundancy versions is the respective redundant version in RV0, RV2, RV4...RV (2n), wherein, n is more than or equal to 0 integer.
Apply the bidirectional relay system of HARQ for 18. 1 kinds, it comprises: Node B, relay station and user side, and wherein, the XOR result of the data from Node B and user side is sent to respectively Node B and user side by described relay station, and described relay system is characterised in that:
Node B sends to relay station according to predetermined redundancy versions RV by data at time slot 1, and meanwhile, user side listens to the data of transmission from Node B;
User side sends to relay station according to predetermined redundancy versions by data at time slot 2, and meanwhile, Node B listens to the data of transmission from user side; And
Relay station respectively sends to Node B and user side according to another redundancy versions that is different from described predetermined redundancy versions by the XOR result of data at time slot 3, thereby the data based on receiving are recovered data separately with the data that listen to by Node B and user side.
19. systems as claimed in claim 18, wherein, described predetermined redundancy versions is RV0, described another redundancy versions is RV1.
20. systems as claimed in claim 18, wherein, described predetermined redundancy versions is RV1, described another redundancy versions is RV0.
21. methods as claimed in claim 18, wherein, described predetermined redundancy versions is any one in RV0, RV2, RV4...RV (2n), described another redundancy versions is the respective redundant version in RV1, RV3, RV5...RV (2n-1), wherein, n is more than or equal to 0 integer.
22. systems as claimed in claim 18, wherein, in the HARQ of type-iii mode, described predetermined redundancy versions is any one in RV1, RV3, RV5...RV (2n-1), described another superfluous She's version is the corresponding superfluous She's version in RV0, RV2, RV4...RV (2n), wherein, n is more than or equal to 0 integer.
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| US20080247349A1 (en) * | 2007-04-03 | 2008-10-09 | Institute For Information Industry | Method, wireless communication system, tangible machine-readable medium, and communication apparatus for transmitting downlink hybrid automatic repeat request packets based on a multi-hop relay standard |
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| Alcatel-Lucent.TDMA HARQ Code for Layer-2 Relay in LTE-Advanced.《3GPP TSG RAN WG1 Meeting #55bis R1-090067》.2009,第1-4页. * |
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