CN101615988B - Method for dispatching hybrid automatic repeat request (HARQ) - Google Patents
Method for dispatching hybrid automatic repeat request (HARQ) Download PDFInfo
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Abstract
The invention provides a method for dispatching a hybrid automatic repeat request (HARQ), which comprises the following steps: at least one HARQ process is reserved for semi-persistent dispatch; UE decodes the one-time HARQ transmission failure of one HARQ process in the reserved HARQ processes and a semi-persistent dispatching occasion occurs between the HARQ process and an occasion of the next HARQ retransmission; and the next HARQ retransmission is canceled by using dynamic dispatch to replace the semi-persistent dispatch or by still using the semi-persistent dispatch. The method for dispatching the HARQ is simple and clear and has convenient processing, high reliability and less delay.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of dispatching method of mixed automatic retransfer request.
Background technology
Fig. 1 shows 3G (Third Generation) Moblie Long Term Evolution (Long Term Evolution, referred to as LTE) Radio interface protocols downstream layers 2 structures of " universal land radio access web (Evolved UniversalTerrestrial Radio Access Network; referred to as E-UTRAN; be comprised of base station eNB, therefore also can be called base station eNB) of evolution " of system.At media access control (Media Access Control, referred to as MAC) protocol layer, there is scheduling/processed (Scheduling/Priority handling) functional entity, wherein, scheduling feature is supported dynamic dispatching (Dynamic scheduling) and semi-persistent scheduling (or being called semi-persistent scheduling) (Semi-persistent Scheduling); Processed function is supported the processed of same subscriber equipment (User Equipment, referred to as UE, i.e. terminal) Different Logic interchannel, also supports to carry out the processed between different UEs by dynamic dispatching.
E-UTRAN (Evolved UMTS Terrestrial Radio Access Network, land radio access web) supports mixed automatic retransfer request (Hybrid ARQ, referred to as HARQ) function.HARQ adopts the concurrent process mode such as stop in N road between layer 1 (referring to physical layer) peer-entities, transmission block (Transport Block, referred to as TB) to be sent and retransmitted, the reliability successfully sending for improving transmission block.These HARQ processes and HARQ entity are associated, HARQ entity is at the asynchronous adaptive retransmission of descending support, refer to need to dispatch by 1/ layer of 2 (L1/L2) control channel of layer the opportunity retransmitting, and can use and first different Radio Resources, the Modulation and Coding Scheme (MCS) etc. of passing.In LTE system, 1/ layer of 2 control channel of layer refers to Physical Downlink Control Channel (Physical DownlinkControl Channel, referred to as PDCCH).During the first biography of HARQ, send initial redundancy version (the Redundancy Version of transmission block, referred to as RV), HARQ sends other redundancy versions of transmission block while retransmitting, HARQ is first to be passed and the same HARQ process of HARQ re-transmission use, and receiving terminal is carried out soft union operation in this HARQ process buffering area by the redundancy versions of the re-transmission receiving and the redundancy versions that the head receiving passes.HARQ Loop Round Trip Time (HARQ Round Trip Time, referred to as HARQ RTT) refers to the first shortest time interval passing between HARQ re-transmission of HARQ, and after the first biography of HARQ, HARQ retransmits and at least will after the HARQ RTT time, just can be scheduled.Descending, each HARQ process has an explicit identifier, is called HARQ process identification (PID) (HARQ Processidentifier).When E-UTRAN carries out dynamic dispatching, need to indicate HARQ process identification (PID) to specify UE to use which HARQ process to process corresponding transmission block by PDCCH.
Descending dynamic dispatching function refers to, descending, E-UTRAN can be by (the Cell Radio Network TemporaryIdentifier of the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI on PDCCH, referred to as C-RNTI) at each Transmission Time Interval (Transmit TimeInterval, referred to as TTI, corresponding to a subframe (subframe)) to UE dynamic assignment resource, for example, Physical Resource Block (Physical Resource Block, referred to as PRB) and Modulation and Coding Scheme (Modulation and Coding Scheme, referred to as MCS) etc.When allowing to carry out descending reception, (by discontinuous reception functionality (DRX), controlled), UE always monitors PDCCH, thereby find possible resource for descending reception, distributes.PDCCH mainly carries downlink resource assignment information while being used for descending scheduling, main contents comprise the information such as Resource Block RB assignment information, transformat (Transport Format, referred to as TF) or Modulation and Coding Scheme (MCS), HARQ information, transmission power control TPC information, Radio Network Temporary Identifier RNTI/ cyclic redundancy check (CRC).UE sends the confirmation/non-confirmation response message ACK/NACK of feedback mixed automatic retransfer request to downlink data by Physical Uplink Control Channel (Physical Uplink Control Channel, referred to as PUCCH).
Descending semi-persistent scheduling refers to, descending, E-UTRAN can for the HARQ first of UE sends, to distribute lasting downlink resource be predefine resource, comprises Physical Resource Block PRB, Modulation and Coding Scheme MCS etc.While needing, retransmission information is indicated with explicit signaling by PDCCH, and HARQ retransmits and uses dynamic dispatching.There is the subframe (Subframe) of persistent resource at UE during, if UE does not find its C-RNTI on PDCCH, think the descending transmission of carrying out in the resource of the corresponding with good grounds persistent assignments of TTI.In addition, there is the subframe of persistent resource at UE during, if UE has found its C-RNTI on PDCCH, UE is used the resource of PDCCH indication to distribute the distribution that substitutes (Override) persistent resource at corresponding TTI, and persistent resource is not decoded.Typically, semi-persistent scheduling is applied to VoIP business, for the persistent resource of its distribution is take 20ms as the cycle.Semi-persistent scheduling carries out initial configuration by Radio Resource control (Radio Resource Control, referred to as RRC) signaling, for example, distribute the cycle (Periodicity) of semi-persistent scheduling.The activation (Activation) of semi-persistent scheduling is controlled by PDCCH, and PDCCH indicates by special C-RNTI, and the C-RNTI that this special C-RNTI is used during from dynamic dispatching is different.
In descending semi-persistent scheduling, the first biography of HARQ used persistent resource, only when activating persistent resource, use PDCCH signaling one time, UE stores assigned persistent resource, and first biography of later HARQ no longer needs to indicate by PDCCH the information such as HARQ process identification (PID).HARQ retransmits and uses asynchronous adaptive mode to carry out dynamic dispatching, and each re-transmission all needs to indicate by PDCCH the information such as HARQ process identification (PID).When receiving HARQ re-transmission, the HARQ process that UE is used in the time of cannot knowing the first biography of HARQ, therefore also cannot carry out soft union operation in desired HARQ process buffering area.The problems referred to above are described as shown in Figure 2, for the preallocated resource of lasting scheduling passes for HARQ is first, are positioned at subframe N1, N2, N3, and the time interval of establishing between above-mentioned every two adjacent sub-frame is 20ms; By dynamic dispatching, carry out HARQ re-transmission, by PDCCH indication, retransmit the HARQ process identification (PID) of using, HARQ retransmits and is positioned at subframe X1, X2, X3.The HARQ process of using while not having HARQ process identity information, UE not to know the first biography of HARQ while passing because HARQ is first, although indicated HARQ process identity information when HARQ retransmits on PDCCH, UE cannot associate both.
For addressing the above problem, mainly contain at present the following feasible scheme:
Scheme one: be not the reserved HARQ process of semi-persistent scheduling, pass for HARQ is first, use an idle buffering area and an interim HARQ sign in inside to be associated.Some restrictions are carried out in the scheduling that this scheme need to retransmit HARQ, for example, base station eNB is receiving that use persistent resource carries out after the first non-confirmation response message NACK passing of HARQ, need to first dispatch its corresponding HARQ and retransmit, the HARQ sign of using when then interim HARQ sign is retransmitted with this HARQ is associated; If have first biography of multiple HARQ according to persistent resource all to need to retransmit, dispatch successively corresponding HARQ according to the first order passing of HARQ and retransmit; This scheme also exists some abnormal conditions to need extra restriction when mutual with dynamic dispatching.In general, although this scheme does not need reserved HARQ process, favourable for improving throughput and peak data rate to a certain extent, complexity is higher, and reliability is relatively low.
Scheme two: be the reserved HARQ process of semi-persistent scheduling, the buffering area of this HARQ process is divided into two parts in order to store two memory blocks, and the different value of the new data indication field (NDI) in PDCCH signaling is distinguished above-mentioned two transmission blocks while retransmitting with HARQ.The problem that a reserved HARQ process exists is: when the first biography of the HARQ carrying out according to certain persistent resource, need to carry out repeatedly HARQ and retransmit, and when HARQ retransmits the subframe being positioned at and exceedes the shared subframe position of next persistent resource, if there is new data need to utilize this persistent resource to carry out the first biography of HARQ, corresponding harq buffer district need to be cleared to store new transmission block, thereby the corresponding HARQ re-transmission of its previous persistent resource has to abandon.For example, HARQ entity is supported 8 parallel HARQ processes, and HARQ RTT is 8ms, and when semi-persistent scheduling is used for VoIP business, the every 20ms of persistent resource is upstate.Twice persistent resource subframe between can allow at most 2 HARQ to retransmit, the subframe position of 20ms after the first biography of upper once HARQ, the subframe position that can use at upper once persistent resource, if there is new transmission block to need to send, HARQ process buffering area need to be cleared to carry out the first biography of new HARQ.If at this moment the HARQ of previous transmission block retransmits and carried out 2 times, but still not success, also cannot carry out the 3rd time and more times HARQ retransmits.The description of the problems referred to above as shown in Figure 2, be made as the reserved HARQ process X of semi-persistent scheduling, this reserved HARQ process number can be notified UE by base station eNB by RRC signaling or PDCCH signaling, so UE knows the first biography of HARQ and HARQ re-transmission and all can use HARQ process X, has solved the related question that the first biography of HARQ and HARQ retransmit.But, between subframe N1 and N2, only allow to carry out twice HARQ re-transmission, if have new transmission block at subframe N2 place, need to carry out in this position the first biography of new HARQ, so retransmit even without success and also need to use the transmission block of new reception to replace the content in original harq buffer district for the HARQ of subframe N1, thereby cause taking defeat for the transmission block of subframe N1.If continue to retransmit the redundancy versions of the corresponding transmission block of subframe N1 at subframe X3 place, may cause also taking defeat for the transmission block of subframe N2, because at subframe N2 and afterwards, the content in harq buffer district is the first redundancy versions passing of HARQ corresponding to subframe N2.This programme is divided into two parts by the buffering area of HARQ process and has solved the problems referred to above.Owing to using, the needed buffering area of its transmission block of business of semi-persistent scheduling is less, and it is feasible therefore corresponding harq buffer being divided into two parts.The reserved HARQ process of this scheme is also relatively little on the impact of throughput and peak data rate, and shortcoming is the operation relative complex for harq buffer district, needs the extra definition special behavior different from existing HARQ flow process.
Scheme three: be the reserved HARQ process of semi-persistent scheduling, and dynamically reserve according to actual needs other idle HARQ processes for semi-persistent scheduling.Existing problem during an only reserved HARQ process that in this scheme, dynamically reserved other HARQ processes are mentioned in also can solution two, relatively little for the impact of throughput and peak data rate, resource utilization is higher; Shortcoming is that dynamically operation reserved and release HARQ process is more complicated by PDCCH, reliability is lower, there is the situation of reserved or release failure, thereby cause HARQ to retransmit failure or waste of radio resources phenomenon, and detect the mechanism that above-mentioned error situation need to be extra, also can bring new complexity and delay.
Scheme four: reserved two or more HARQ processes are for semi-persistent scheduling, two or more HARQ processes are used persistent resource to carry out the first biography of HARQ in turn, with system-frame (System Frame Number, referred to as SFN)+subframe (Subframe) distinguishes different HARQ process and sends opportunity, thus HARQ is separately retransmitted and the first biography of HARQ is associated.This scheme, for one of them reserved HARQ process, is equivalent to the cycle of subframe position shared persistent resource to expand.For example, when having reserved two HARQ processes for semi-persistent scheduling, two situations that HARQ process is used in turn, take VoIP business as example, for one of them HARQ process, the cycle that is equivalent to persistent resource is expanded as 40ms from 20ms, so can allow at most 4 HARQ to retransmit between the shared subframe of twice available persistent resource, retransmit successful probability thereby improved HARQ.In LTE system, 1 SFN is comprised of 10 subframes, each subframe 1ms, and 10ms altogether, so have 2 SFN between twice available persistent resource of VoIP business.When two HARQ processes are used persistent resource in turn, for one of them HARQ process, the cycle of its persistent resource is 4 SFN.As shown in Figure 3, reserved HARQ process x, y are for semi-persistent scheduling for such scheme, and the persistent resource of HARQ process x is positioned at subframe N1, N3... etc., and for carrying out, HARQ is first to be passed; The persistent resource of HARQ process y is positioned at subframe N2... etc., and for carrying out, HARQ is first to be passed.Subframe N1, N2, N3 lay respectively in system-frame SFN1, SFN3, SFN5.The subframe that the HARQ of HARQ process x retransmits place is N1_X1, N1_X2, N1_X3, and the subframe that the HARQ of HARQ process y retransmits place is N2_X1.Because two HARQ processes are used harq buffer district separately, the HARQ that therefore crosses over persistent resource border retransmits N1_X3 does not affect HARQ re-transmission N2_X1.The advantage of this scheme is simply clear, and shortcoming is larger on the impact of throughput and peak data rate.Owing in most cases needing not exceed 2 above HARQ, retransmit, reserved 2 or more HARQ processes will be wasted Radio Resource for semi-persistent scheduling.This scheme is further optimized for to above-mentioned reserved HARQ process and when being not used in semi-persistent scheduling, can distributes to dynamic dispatching use, but this has improved the complexity of this scheme greatly, and the gain bringing is limited.
The common trait of scheme two, scheme three, scheme four is that difference is to retransmit the processing under the subframe border condition of crossing persistent resource place for HARQ for the reserved HARQ process of semi-persistent scheduling retransmits and the first related question passing of HARQ to solve HARQ.
Although above-mentioned four kinds of schemes can solve the existing the problems referred to above of descending semi-persistent scheduling, all there is the shortcoming that complexity is high, reliability is low in these four kinds of schemes.
Summary of the invention
The present invention aims to provide the dispatching method of a kind of HARQ, to solve the problem that such scheme complexity is high, reliability is low.
Technical scheme of the present invention provides the dispatching method of a kind of HARQ, comprises the following steps: be reserved at least one the HARQ process of semi-persistent scheduling; A HARQ bust this of a HARQ process in the reserved HARQ process of UE decoding, and in this HARQ process on there is semi-persistent scheduling opportunity between opportunity that once HARQ retransmits; Use dynamic dispatching to replace semi-persistent scheduling or still use semi-persistent scheduling and cancel next time HARQ and retransmit.
Preferably, for reserved at least one the HARQ process of semi-persistent scheduling specifically comprises: the relevant information of reserved HARQ process is configured to UE by radio resource control signaling or PDCCH.
Preferably, for reserved at least one the HARQ process of semi-persistent scheduling specifically comprises: the number of configure reserved HARQ process is fixed value; Or according to the number of the cycle configure reserved HARQ process of semi-persistent scheduling.
Preferably, described reserved HARQ process can be completely shared by dynamic dispatching, i.e. dynamic dispatching can be used described reserved HARQ process in any subframe, after comprising that persistent resource duration of existence and persistent resource are released.
Preferably, HARQ retransmits the reserved HARQ process of using next time.
Preferably, HARQ re-transmission is next time used reserved HARQ process specifically to comprise: UE carries out soft merging by the available data in the buffering area of the redundancy versions that HARQ retransmits and reserved HARQ process next time.
Preferably, use dynamic dispatching to replace semi-persistent scheduling specifically to comprise: other HARQ processes that are different from reserved HARQ process are used in dynamic dispatching; Wherein, if to there is multiple semi-persistent scheduling opportunity between the opportunity that HARQ next time retransmits, for the dynamic dispatching on multiple semi-persistent scheduling opportunity, use respectively different HARQ processes; Or reserved HARQ process is used in dynamic dispatching.
Preferably, to there is multiple semi-persistent scheduling opportunity between the opportunity that HARQ next time retransmits, use dynamic dispatching to replace semi-persistent scheduling specifically to comprise: dynamic dispatching occurs between twice semi-persistent scheduling opportunity.
Preferably, use dynamic dispatching to replace semi-persistent scheduling specifically to comprise: base station is used dynamic dispatching to cover semi-persistent scheduling at semi-persistent scheduling opportunity; UE is machine monitoring PDCCH when semi-persistent scheduling, according to the upper indicated resource allocation information of PDCCH, processes the first biography of new HARQ or HARQ re-transmission.
Preferably, according to the upper indicated resource allocation information of PDCCH, process that new HARQ is first to be passed or HARQ retransmits and specifically comprises: base station is the pre-configured persistent resource of dynamic assignment semi-persistent scheduling again, and persistent resource allocation is given to former UE or distributed to other UE; UE processes the first biography of HARQ according to the resource of the upper indicated described dynamic assignment again of PDCCH or HARQ retransmits.
Preferably, resource allocation information comprise following one of at least: resource block assignments information, Modulation and Coding Scheme information, HARQ information.
Preferably, according to the upper indicated resource allocation information of PDCCH, process first biography of new HARQ and specifically comprise: during the redundancy versions of the indicated transmission block of UE receiving resource allocation information, the buffering area of using the upper indicated HARQ process of PDCCH.
Preferably, according to the upper indicated resource allocation information of PDCCH, processing first biography of new HARQ specifically comprises: the HARQ that cancels front semi-persistent scheduling opportunity is first to be passed corresponding further HARQ and retransmit.
Preferably, according to the upper indicated resource allocation information of PDCCH, processing HARQ retransmits and specifically comprises: when UE processes according to the upper indicated HARQ process of PDCCH that new HARQ is first to be passed, if decoded unsuccessfully, use the upper indicated HARQ process of PDCCH to process further HARQ and retransmit.
Preferably, UE does not receive PDCCH signaling during machine monitoring PDCCH when semi-persistent scheduling, also comprises: UE indicates new transmission and associated HARQ information thereof to HARQ entity, processes first biography of HARQ of this semi-persistent scheduling; The HARQ that processes this semi-persistent scheduling is first while passing, use reserved HARQ process, and by the current data in the alternative buffering area of received data; If decoded unsuccessfully, further HARQ retransmits the reserved HARQ process of using, and by the current data in the alternative buffering area of received data.
Dispatching method of the present invention is because adopt dynamic dispatching to cover semi-persistent scheduling, thus overcome the problem that prior art scheme complexity is high, reliability is low, and then reached simple clear, process convenient, reliability is high, postpone little effect.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the schematic diagram of E-UTRAN Radio interface protocols downstream layers 2 structures;
Problem schematic diagram when Fig. 2 shows the related question that semi-persistent scheduling HARQ retransmits and HARQ head passes and reserves a HARQ process for semi-persistent scheduling;
It is reserved two the HARQ process solution schematic diagrames of semi-persistent scheduling that Fig. 3 shows existing;
Fig. 4 shows according to the flow chart of the HARQ dispatching method of the embodiment of the present invention;
Fig. 5 shows the schematic diagram of HARQ dispatching method according to the preferred embodiment of the invention;
Fig. 6 shows the flow chart of HARQ dispatching method according to the preferred embodiment of the invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 4 shows according to the flow chart of the HARQ dispatching method of the embodiment of the present invention, comprises the following steps:
Step S10 is reserved at least one the HARQ process of semi-persistent scheduling;
Step S20, a HARQ bust this of a HARQ process in the reserved HARQ process of UE decoding, and in this HARQ process on there is semi-persistent scheduling opportunity between opportunity that once HARQ retransmits;
Step S30, is used dynamic dispatching to replace (Override) semi-persistent scheduling or still uses semi-persistent scheduling and cancel next time HARQ and retransmit.
Described semi-persistent scheduling refers to a subframe or the continuous multiple subframes that persistent resource is positioned at opportunity.Described HARQ re-transmission refers to a subframe or the continuous multiple subframes that HARQ retransmission opportunity is positioned at opportunity.Described HARQ transmission refers to that the first biography of HARQ or HARQ retransmit.
This dispatching method covers semi-persistent scheduling because of employing dynamic dispatching when decoding unsuccessfully, so overcome the problem that the assorted degree of prior art scheme is high, reliability is low, this HARQ retransmits the first associated scheme passing with HARQ, only need a reserved HARQ process, compare with the scheme of reserved two HARQ processes, impact for throughput and peak data rate is less, saves Radio Resource; Compare with schemes of other reserved HARQ processes, simply clear, processing facilitates, reliability is high, it is little to postpone.Obviously, the dispatching method of other preferred embodiments of the present invention is also supported reserved two or more HARQ processes.
Preferably, step S10 specifically comprises: the relevant information of reserved HARQ process is configured to UE by radio resource control signaling (RRC) or 1/ layer of 2 control channel PDCCH of layer.
Preferably, step S10 specifically comprises: the number of configure reserved HARQ process is fixed value; Or according to the number of the cycle configure reserved HARQ process of semi-persistent scheduling.
Preferably, described reserved HARQ process can be completely shared by dynamic dispatching, i.e. dynamic dispatching can be used described reserved HARQ process in any subframe, after comprising that persistent resource duration of existence and persistent resource are released.
Preferably, HARQ retransmits the reserved HARQ process of using next time.
Preferably, HARQ re-transmission is next time used reserved HARQ process specifically to comprise: UE carries out soft merging by the available data in the buffering area of the redundancy versions that HARQ retransmits and reserved HARQ process next time.
Preferably, step S30 specifically comprises: other HARQ processes that are different from reserved HARQ process are used in dynamic dispatching; Wherein, if to there is multiple semi-persistent scheduling opportunity between the opportunity that HARQ next time retransmits, for the dynamic dispatching on multiple semi-persistent scheduling opportunity, use respectively different HARQ processes; Or reserved HARQ process is used in dynamic dispatching.
Preferably, to there is multiple semi-persistent scheduling opportunity between the opportunity that HARQ next time retransmits, step S30 specifically comprises: dynamic dispatching occurs between twice semi-persistent scheduling opportunity.
Preferably, step S30 specifically comprises:
Base station is used dynamic dispatching to cover semi-persistent scheduling at semi-persistent scheduling opportunity;
UE thinks that described semi-persistent scheduling will be replaced by dynamic dispatching office opportunity, and machine monitoring PDCCH when semi-persistent scheduling, processes the first biography of new HARQ or HARQ re-transmission according to the upper indicated resource allocation information of PDCCH.
Preferably, according to the upper indicated resource allocation information of PDCCH, process that new HARQ is first to be passed or HARQ retransmits and specifically comprises: base station is the pre-configured persistent resource of dynamic assignment semi-persistent scheduling again, and persistent resource allocation is given to former UE or distributed to other UE.UE processes the first biography of HARQ according to the resource of the upper indicated described dynamic assignment again of PDCCH or HARQ retransmits.
Preferably, resource allocation information comprise following one of at least: Resource Block (RB) assignment information, Modulation and Coding Scheme (MCS) information, HARQ information.HARQ information can comprise new HARQ process identification (PID), this process identification (PID) can with by the reserved HARQ process identification (PID) of semi-persistent scheduling identical or different.
Preferably, according to the upper indicated resource allocation information of PDCCH, process first biography of new HARQ and specifically comprise: during the redundancy versions of the indicated transmission block of UE receiving resource allocation information, the buffering area of using the upper indicated HARQ process of PDCCH.
Preferably, according to the upper indicated resource allocation information of PDCCH, processing HARQ retransmits and specifically comprises: when UE processes according to the upper indicated HARQ process of PDCCH that new HARQ is first to be passed, if decoded unsuccessfully, use the upper indicated HARQ process of PDCCH to process further HARQ and retransmit.
Preferably, UE does not receive PDCCH signaling during machine monitoring PDCCH when semi-persistent scheduling, also comprises:
UE indicates new transmission and associated HARQ information thereof to HARQ entity, processes first biography of HARQ of this semi-persistent scheduling;
The HARQ that processes this semi-persistent scheduling is first while passing, use reserved HARQ process, and by the current data in the alternative buffering area of received data; If decoded unsuccessfully, further HARQ retransmits the reserved HARQ process of using, and by the current data in the alternative buffering area of received data.
Fig. 5 shows the schematic diagram of HARQ dispatching method according to the preferred embodiment of the invention, is described as follows:
A reserved HARQ process is for semi-persistent scheduling, and HARQ process identification (PID) is x.The subframe being positioned at for the persistent resource of semi-persistent scheduling is N1, N2, N3, lays respectively in system-frame SFN1, SFN3, SFN5, and for carrying out, HARQ is first to be passed.Be located at that the subframe N1 UE of place decoding HARQ is first to be passed unsuccessfully, in subframe N1_X1, the UE of N1_X2 place decoding, HARQ retransmits all failures, after the re-transmission of HARQ next time of UE expectation is positioned at subframe N2, is assumed to and need to receives in the position of subframe N1_X3 this HARQ re-transmission.According to the present invention, UE can not be used in subframe N2 position pre-configured persistent resource to process the first biography of HARQ, but process according to HARQ process y indicated on PDCCH at subframe N2 place, new HARQ is first to be passed.And in subframe N1_X3 position, use HARQ process x to process the corresponding further HARQ re-transmission of the first biography of HARQ for subframe N1.If UE is first the biography unsuccessfully of subframe N2 use HARQ process y decoding HARQ, UE processes for the corresponding HARQ of the first biography of HARQ of subframe N2 and retransmits according to HARQ process y indicated on PDCCH at subframe N2_X1.Because the first biography of HARQ and the corresponding HARQ thereof of subframe N1 retransmit the harq buffer district that all uses HARQ process x and correspondence thereof, the HARQ of subframe N2 is first to be passed and corresponding HARQ retransmits the upper indicated new HARQ process y of PDCCH and corresponding harq buffer district thereof while using dynamic dispatching, and the HARQ that therefore crosses over persistent resource border retransmits N1_X3 does not affect that the HARQ at subframe N2 place is first to be passed and the HARQ re-transmission at subframe N2_X1 place.
Further, if UE does not receive the signaling on PDCCH at subframe N2 place, UE uses and uses reserved HARQ process x to process the first biography of HARQ according to pre-configured persistent resource, uses the transmission block newly receiving to replace the data in current harq buffer district.Be equivalent to retransmit N1_X3 for the corresponding HARQ of the first biography of HARQ of subframe N1 and tolled breakdown, the loss of data causing is recovered by the HARQ ARQ of wireless chain control layer RLC.
Fig. 6 shows the flow chart of HARQ dispatching method according to the preferred embodiment of the invention, and step is as follows:
Step 110: be the reserved HARQ process of semi-persistent scheduling, base station is by RRC signaling or the reserved HARQ process number of PDCCH notice UE
Does the desired HARQ of step 120:UE retransmit and will cross the subframe at next available persistent resource place? if so, go to step 140; Otherwise go to step 130;
Step 130: retransmit in the case of between the subframe at twice available persistent resource place at HARQ, UE uses reserved HARQ process to process the first biography of HARQ and HARQ retransmits, and goes to step 120;
Step 140: the subframe being positioned at this persistent resource, does UE monitoring PDCCH channel, receive PDCCH signaling? if so, go to step 160; Otherwise go to step 150;
Step 150: use the alternative semi-persistent scheduling of dynamic dispatching for the subframe at this persistent resource place, other HARQ processes of using PDCCH above to indicate are processed the first biography of its HARQ and further HARQ re-transmission; Go to step 120;
Step 160:UE is used persistent resource to process the first biography of new HARQ in reserved HARQ process, abandons retransmitting for the corresponding further HARQ of the first biography of HARQ of a front persistent resource; Go to step 120;
As can be seen from the above description, the HARQ that the HARQ dispatching method of above-described embodiment proposes retransmits the first associated scheme passing with HARQ, only need a reserved HARQ process, compare with the scheme of reserved two HARQ processes, impact for throughput and peak data rate is less, saves Radio Resource; Compare with the scheme of other reserved HARQ processes, the present invention is simply clear, processing is convenient, reliability is high, it is little to postpone.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (15)
1. a dispatching method for mixed automatic retransfer request, is characterized in that, comprises the following steps:
Terminal is reserved at least one hybrid automatic repeat request process of semi-persistent scheduling;
Decoding terminals failure, wherein, the mixed once HARQ bust this of a hybrid automatic repeat request process described in described decoding terminals in reserved hybrid automatic repeat request process, and in this hybrid automatic repeat request process on once between opportunity of mixed automatic retransfer request retransmission, there is semi-persistent scheduling opportunity, a subframe or continuous multiple subframes that described semi-persistent scheduling is positioned at for persistent resource opportunity;
The HARQ desired according to UE retransmits whether will cross the subframe at next available persistent resource place, and whether receive PDCCH signaling in the subframe at this available persistent resource place, use dynamic dispatching replace described semi-persistent scheduling or still use semi-persistent scheduling and cancel mixed automatic retransfer request retransmission next time, wherein, this step is as follows: in above-mentioned both judged results, be in the situation that, use dynamic dispatching to replace described semi-persistent scheduling; In the former judged result, be yes, the latter's judged result is, in no situation, still use semi-persistent scheduling and cancel mixed automatic retransfer request retransmission next time.
2. dispatching method according to claim 1, is characterized in that, for reserved at least one hybrid automatic repeat request process of semi-persistent scheduling specifically comprises:
The relevant information of described reserved hybrid automatic repeat request process is configured to described terminal by radio resource control signaling or Physical Downlink Control Channel.
3. dispatching method according to claim 1, is characterized in that, for reserved at least one hybrid automatic repeat request process of semi-persistent scheduling specifically comprises:
The number that configures described reserved hybrid automatic repeat request process is fixed value; Or
According to the cycle of semi-persistent scheduling, configure the number of described reserved hybrid automatic repeat request process.
4. dispatching method according to claim 1, is characterized in that, for reserved at least one hybrid automatic repeat request process of semi-persistent scheduling specifically comprises: described reserved hybrid automatic repeat request process is completely shared by described dynamic dispatching.
5. dispatching method according to claim 1, is characterized in that, the described request retransmission of mixed automatic retransfer is next time used described reserved hybrid automatic repeat request process.
6. dispatching method according to claim 5, is characterized in that, the described request retransmission of mixed automatic retransfer is next time used described reserved hybrid automatic repeat request process specifically to comprise:
Described terminal is carried out soft merging by the available data in the buffering area of the redundancy versions of the described request retransmission of mixed automatic retransfer next time and described reserved hybrid automatic repeat request process.
7. dispatching method according to claim 1, is characterized in that, uses dynamic dispatching to replace described semi-persistent scheduling specifically to comprise:
Other hybrid automatic repeat request process that are different from described reserved hybrid automatic repeat request process are used in described dynamic dispatching; Wherein, if to there is multiple described semi-persistent scheduling opportunity between the opportunity of mixed automatic retransfer request retransmission next time, for the dynamic dispatching on described multiple semi-persistent scheduling opportunity, use respectively different hybrid automatic repeat request process; Or
Described reserved hybrid automatic repeat request process is used in described dynamic dispatching.
8. dispatching method according to claim 1, is characterized in that, to there is multiple described semi-persistent scheduling opportunity between the opportunity of mixed automatic retransfer request retransmission next time, uses dynamic dispatching to replace described semi-persistent scheduling specifically to comprise:
Described dynamic dispatching occurs between opportunity at semi-persistent scheduling described in twice.
9. dispatching method according to claim 1, is characterized in that, uses dynamic dispatching to replace described semi-persistent scheduling specifically to comprise:
Base station is used dynamic dispatching to cover described semi-persistent scheduling at described semi-persistent scheduling opportunity;
Terminal, at described semi-persistent scheduling monitors physical on opportunity down control channel, is processed the first biography of new mixed automatic retransfer request or mixed automatic retransfer request retransmission according to resource allocation information indicated on Physical Downlink Control Channel.
10. dispatching method according to claim 9, is characterized in that, processes new mixed automatic retransfer request head biography or mixed automatic retransfer request retransmission specifically comprise according to resource allocation information indicated on Physical Downlink Control Channel:
Described base station is the pre-configured persistent resource of semi-persistent scheduling described in dynamic assignment again, and described persistent resource allocation is given to former terminal or distributed to other-end;
Described terminal is processed the first biography of mixed automatic retransfer request or mixed automatic retransfer request retransmission according to the resource of described dynamic assignment again indicated on Physical Downlink Control Channel.
11. dispatching methods according to claim 10, is characterized in that, described resource allocation information comprise following one of at least:
Resource block assignments information, Modulation and Coding Scheme information, hybrid automatic retransmission request information.
12. dispatching methods according to claim 9, is characterized in that, process first biography of new mixed automatic retransfer request specifically comprise according to resource allocation information indicated on Physical Downlink Control Channel:
When described terminal receives the redundancy versions of the indicated transmission block of described resource allocation information, the buffering area of using hybrid automatic repeat request process indicated on described Physical Downlink Control Channel.
13. dispatching methods according to claim 9, is characterized in that, process first biography of new mixed automatic retransfer request specifically comprise according to resource allocation information indicated on Physical Downlink Control Channel:
The mixed automatic retransfer request of cancelling front semi-persistent scheduling opportunity is first passes corresponding further mixed automatic retransfer request retransmission.
14. dispatching methods according to claim 9, is characterized in that, process mixed automatic retransfer request retransmission specifically comprise according to resource allocation information indicated on Physical Downlink Control Channel:
When described terminal is processed the first biography of described new mixed automatic retransfer request according to hybrid automatic repeat request process indicated on described Physical Downlink Control Channel, if decoded unsuccessfully, use hybrid automatic repeat request process indicated on described Physical Downlink Control Channel to process further mixed automatic retransfer request retransmission.
15. dispatching methods according to claim 9, is characterized in that, terminal does not receive Physical Downlink Control Channel signaling when described semi-persistent scheduling monitors physical on opportunity down control channel, also comprises:
Described terminal is indicated new transmission and associated hybrid automatic retransmission request information thereof to mixed automatic retransfer request entity, processes first biography of mixed automatic retransfer request of this semi-persistent scheduling;
The mixed automatic retransfer request of processing this semi-persistent scheduling is first while passing, use described reserved hybrid automatic repeat request process, and by the current data in the alternative buffering area of received data; If decoded unsuccessfully, further mixed automatic retransfer request retransmission is used described reserved hybrid automatic repeat request process, and by the current data in the alternative buffering area of received data.
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| CN102202408B (en) * | 2010-03-22 | 2014-01-01 | 华为技术有限公司 | Method, system and device for scheduling multiple subframes |
| CN102137504B (en) * | 2011-04-12 | 2016-01-20 | 电信科学技术研究院 | A kind of method of dispatching transmission of multiple sub-frames and device |
| CN103313254B (en) * | 2013-06-06 | 2016-02-10 | 北京中科晶上科技有限公司 | A kind of method of LTE uplink scheduling and device |
| WO2015013959A1 (en) | 2013-08-01 | 2015-02-05 | 华为技术有限公司 | Method and device for information configuration and data receiving |
| CN104581897B (en) * | 2013-10-21 | 2019-08-23 | 南京中兴新软件有限责任公司 | Poewr control method, device and base station |
| EP3041160B1 (en) * | 2013-10-30 | 2017-12-27 | Huawei Technologies Co., Ltd. | Hybrid automatic repeat request data decoding method, node device, and decoding system |
| EP4290791A3 (en) * | 2016-12-21 | 2024-03-13 | Nokia Technologies Oy | Automatic retransmission of damaged data in wireless networks |
| CN108811087B (en) * | 2017-05-02 | 2021-04-02 | 维沃移动通信有限公司 | Data processing method and terminal |
| CN110167180B (en) * | 2018-02-11 | 2021-04-27 | 维沃移动通信有限公司 | Transmission method and equipment |
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