CN104378185A - Scheduling method and device for bundling subframes in LTE (long term evolution) system - Google Patents
Scheduling method and device for bundling subframes in LTE (long term evolution) system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L1/1816—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of the same, encoded, message
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Abstract
Disclosed is a scheduling method and device for bundling subframes in an LTE (long term evolution) system. The method includes: initializing a resource allocation range of non-TTI (transmission time interval) bundling users and TTI bundling users; performing non-adaptive HARQ (hybrid automatic repeat request) retransmission scheduling on the last three TTIs in one bundle for newly-transmitted or retransmitted scheduled TTI bundling users; performing non-adaptive HARQ retransmission scheduling on the first TTI in one bundle for the newly-transmitted or retransmitted scheduled TTI bundling users; performing semi-persistent scheduling or dynamic scheduling on SPS (semi-persistent scheduling) users; performing HARQ adaptive or non-adaptive retransmission scheduling on the non-TTI bundling users; performing dynamic new transmission scheduling on the non-TTI bundling users and the TTI bundling users.
Description
Technical field
The present invention relates to moving communicating field, particularly one is for ensureing dispatching method and the device of subframe binding in LTE (Long Term Evolution, long evolving system) system.
Background technology
In LTE system, the unit of scheduling is 1ms, adopts HTT (HARQ Loop Round Trip Time, HARQ is hybrid automatic repeat-request) to equal the HARQ self adaptation of 8ms or non-self-adapting retransmission scheme just can ensure uplink transmission rate under general scene.But for the edge of community, user channel quality worsens, because user uplink transmitted power is limited, the reliability of transmission can not be improved by bring to power, according to the HARQ retransmission process under general scene, retransmit the back off time all needing 8ms each time, the edge error rate is higher, need repeatedly to retransmit, the business such as networking telephone VoIP can not be met to the requirement of latency sensitive, therefore, the concept of TTI bundling (time slot binding) is proposed in LTE system, continuous print 4 sub-frame of uplink are bound, these 4 continuous print subframes take identical RB resource (RB is Resource Block), transmit the different redundancy versions (rv=0 of same transmission block, 2, 3, 1), the TTI length of scheduling increases 4ms, all redundancy versions will be transmitted like this when new biography, these redundancy versions can merge by base station eNodeB decodes, reduce propagation delay time, the requirement of the business such as VoIP to transmission delay sensitivity can be met, simultaneously, TTI bundling also can carry out HARQ re-transmission, that 4 continuous print subframes retransmit together equally, the successful probability of data decode can be improved like this, ensure the quality of transfer of data, improve the scope that LTE ascending edge covers.
Up employing synchronous HARQ mechanism in current LTE system, namely adopt fixing retransmission time interval, it is 8ms that general HARQ retransmits HTT, and the redundancy versions that same transmission block retransmits is according to 0, and the sequential loop of 2,3,1 is transmitted.PHICH is mixed automatic retransfer instruction physical channel.Transmission block first time transmission uses redundancy versions 0, if the decoding of base station eNodeB physical layer is correct, then feeding back PHICH is ACK (confirmation), UE does not need the redundancy versions transmitting other again, if now eNodeB issues new uplink scheduling authorization PDCCH, then UE can start to transmit new transmission block, if base station eNodeB physical layer is decoded unsuccessfully, then feeding back PHICH is NACK (non-acknowledgement), UE needs to re-use redundancy versions 2 to be transmitted, now base station eNodeB retransmits according to adaptive retransmission or non-self-adapting and determines the need of issuing uplink authorization PDCCH (PhysicalDownlink Control Channel, property control channel under physics), itself and all data received before merge to decode after receiving the data of redundancy versions 2 by base station eNodeB, according to decoded result feedback PHICH, repetition like this is until eNodeB can successfully decode or reach maximum transmission times, UE (User Equipment, user terminal) no longer send any redundancy versions of this transmission block.
Retransmission scheme has two kinds: non-self-adapting retransmits and adaptive retransmission.Non-self-adapting retransmits and refers to that retransmitting the resource taken follows new biography identical, the RB resource of fixed position is transmitted, base station eNodeB does not need to issue uplink authorization PDCCH, and user UE is that NACK directly retransmits in the resource of new biography distribution according to the PHICH of base station feedback.Adaptive retransmission refers to and retransmits and can be different from the transmitted over resources of new biography, position changeable, and base station eNodeB needs to issue uplink authorization PDCCH after being assigned with new RB resource, and user UE retransmits on deallocated resources according to new uplink authorization.
If the failure of base station physical layer decoder, general HARQ takes first non-self-adapting to retransmit the mode of adaptive retransmission again, if non-self-adapting retransmits and the failure of adaptive retransmission Resources allocation, namely distribute less than RB or CCE resource (CCE is control channel unit), then now feeding back PHICH can not be NACK, because user receives this feedback directly can carry out non-self-adapting re-transmission, now should feed back PHICH is FAKE ACK (false confirmation), but user receives ACK feedback does not receive again new uplink authorization PDCCH, then stop the transmission of this transmission block, wait for the uplink authorization next time retransmitted.
Such as carry out the new biography of transmission block 1 subframe N user, decode after receiving data in base station, subframe N+4 feeds back PHICH,
Whether if decoding is correct, then feeding back PHICH is ACK, simultaneously according to having new transmission block 2 to need transmission to determine whether issuing new uplink authorization at subframe N+4.
If decoding error, user needs to retransmit transmission block 1, it is NACK that PHICH is then fed back in the success of non-self-adapting retransfer scheduling on subframe N+4, do not issue uplink authorization PDCCH, transmission block 1 retransmits on subframe N+8, if not adaptive retransmission failure, then adaptive retransmission can be carried out, if adaptive retransmission success, on subframe N+4, then feed back PHICH is NACK, issue the mandate PDCCH of uplink retransmission simultaneously, transmission block 1 retransmits on subframe N+8, if adaptive retransmission is failure also, on subframe N+4, then feed back PHICH is FAKE ACK, transmission block 1 does not retransmit on subframe N+8, wait for the uplink authorization that subframe N+12 retransmits, and retransmit on N+16.
But the HARQ of TTI bundling is retransmitted, because the HTT retransmitted is 16ms, new biography on subframe N, then simultaneously can at N+1, N+2, N+3 continuous print subframe is carried out transmit different redundancy versions, base station merges after receiving the data of continuous 4 subframes decodes, subframe N+7 feeds back PHICH, if decoding error, then need to retransmit on subframe N+16, if not adaptive retransmission is dispatched successfully, on subframe N+7, then feed back PHICH is NACK, transmission block 1 retransmits on subframe N+16, if not adaptive retransmission is dispatched unsuccessfully, then carry out adaptive retransmission, if adaptive retransmission success, on subframe N+7, then feed back PHICH is NACK, the mandate PDCCH of uplink retransmission is issued at subframe N+12, transmission block 1 retransmits on subframe N+16, if adaptive retransmission is failure also, namely on subframe N+12, base station side is dispatched unsuccessfully, uplink authorization PDCCH cannot be issued, and PHICH issues on subframe N+7, because base station side scheduling is in units of 1ms, the N+7 moment cannot judge the dispatch situation in N+12 moment, PHICH with PDCCH to issue the moment different, must feed back PHICH at N+7 is NACK, so for this scene retransmitting the failure of application resource, PHICH cannot issue FAKE ACK, the NACK causing user to receive transmission block 1 feedback can carry out non-self-adapting re-transmission at subframe N+16, inconsistent with the behavior of base station retransfer scheduling failure, cause decoding error and the interference to other users.Therefore, TTI bundling HARQ retransmits and cannot to feed back PHICH FAKE ACK simultaneously under the feedback of PHICH in sequential and uplink authorization PDCCH can not issue caused retransmission resource scheduling failure scene and just become TTI bundling and retransmit a problem that must solve.
Simultaneously, TTI bundling retransmits and other scheduling types exist resource contention, re-transmission as TTI bundling conflicts with SPS semi-static scheduling resources, and TTI bundling retransmits and conflicts with non-TTI bundling retransmission resource, and this is also that TTIbundling retransmits the problem that must solve.Semi-Persistent Scheduling, is called for short SPS, and semipermanent is dispatched, and is also called semi-persistent scheduling.Be that UE distributes a Radio Resource different (being specified by PDCCH) from TTI each during dynamic dispatching, SPS allows semi-static allocation radio resource, and this resource period is distributed to certain particular UE.If SPS semi-static scheduling cycle is 20ms, suppose that the frequency domain resource that subframe 0 takies is RB20 ~ RB23, TTI bundling carries out new biography scheduling on subframe N+4, the frequency domain resource taken also is RB20 ~ RB23, on subframe N+11, base station demodulates unsuccessfully feeds back NACK, then need to retransmit on subframe N+20, and subframe N+20 just in time needs transmission SPS semi-persistent scheduling, namely TTIbundling retransmits and conflicts with SPS semi-static scheduling resources.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, a kind of dispatching method for subframe binding in LTE system and device are provided, the technical problem be different from existing for general HARQ re-transmission is retransmitted for solving TTI bundling, ensure that TTI bundling user can successfully retransmit in LTE uplink scheduling, can not because of re-transmission application resource failure or with other user scheduling resource contentions and cannot retransmitting.
Technical scheme of the present invention provides a kind of dispatching method for subframe binding in LTE system, comprises following steps:
1), according to the relevant configuration information initialization scheduling resource of cell configuration or the bandwidth of cell in reshuffling and PUCCH and PRACH, the Resourse Distribute scope determining non-TTI bundling user and TTI bundling user is comprised; Described PUCCH is physical uplink control channel, and described PRACH is Physical Random Access Channel, and described TTI bundling is subframe binding;
2) the TTI bundling user, for new biography or re-transmission dispatched, carries out non-self-adapting HARQ retransfer scheduling to three TTI rear in a bundle, distributes identical RB resource; For the TTI bundling user dispatched, when three TTI non-self-adaptings rear in a bundle are retransmitted, only need the RB distributing same position; Described bundle is binding, and described HARQ is hybrid automatic repeat-request, and described RB is Resource Block;
3), according to step 1) in the Resourse Distribute scope of gained non-TTI bundling user scheduling of resource is carried out to MSG3 new biography, described MSG3 is random accessing message 3;
4) the TTI bundling user, for new biography or re-transmission dispatched, the ACK/NACK information according to HARQ feedback carries out non-self-adapting HARQ retransfer scheduling to first TTI in a bundle; Described ACK is confirmation, and described NACK is unacknowledged information;
5), to SPS user, carry out semi-persistent scheduling or dynamic dispatching, comprise and first carry out semi-persistent scheduling, distribute RB resource identical when activating with SPS, if RB resource is not retransmitted by TTI bundling and takies, then proceed semi-persistent scheduling, otherwise carry out dynamic dispatching; Described SPS is semipermanent scheduling;
6), to non-TTI bundling user carry out HARQ self adaptation or non-self-adapting retransfer scheduling, comprise and first carry out non-self-adapting retransfer scheduling, if failure, then carry out adaptive retransmission scheduling, or stop this retransmitting wait re-transmission next time;
7), to non-TTI bundling and TTI bundling user according to step 1) in result carry out dynamic new biography scheduling.
And, step 2) adopt following sub-step,
Step 201, fill in the input parameter that non-self-adapting retransmits RB distribution, the resource of RB original position and RB number and scheduled bundle first TTI of distribution is identical;
Step 202, distributes the RB resource of same position;
Step 203, encapsulated layer interface;
Step 204, the third time determined whether in a bundle by record number of retransmissions is retransmitted, and is if so, then deleted from re-transmission chained list 1 by HARQ, if not then HARQ still exists in re-transmission chained list 1.
And, step 4) adopt following sub-step,
Step 301, travels through the re-transmission chained list 2 of the TTI bundling dispatched, and performs step 302;
Step 302, if scheduling interval is greater than 16ms, then reclaims HARQ process, no longer carries out retransmitting otherwise performing step 303;
Step 303, if scheduling interval is 11ms, performs step 304, otherwise, perform step 305;
Step 304, feeds back PHICH according to physical layer decoded result, performs step 305; Described PHICH is physical mixed automatic re-transmission indicating channel;
Step 305, if scheduling interval is 16ms, performs step 306, otherwise, perform step 301;
Step 306, physical layer decoded result is that ACK or re-transmission reach maximum retransmission, now no longer carry out retransmission process, directly reclaim HARQ, otherwise decoded result is NACK, perform step 307;
Step 307, fill in the input that TTI bundling non-self-adapting retransmits RB, the resource of RB original position and RB number and scheduled bundle first TTI of distribution is identical, performs step 308;
Step 308, distributes the RB resource of same position;
Step 309, encapsulated layer interface;
Step 310, adds TTI bundling to and retransmits in chained list 1, for the re-transmission of three TTI rear in bundle by this HARQ of scheduling.
And, step 5) adopt following sub-step,
Step 401, SPS user first carries out semi-persistent scheduling, distributes RB resource identical when activating with SPS, takies, then perform step 402 if RB resource has been retransmitted by TTI bundling, otherwise, perform step 404;
Step 402, for carrying out SPS dynamic dispatching, redistributes new RB resource, performs step 403;
Step 403, for carrying out SPS dynamic dispatching, distributes new CCE resource, performs step 404;
Step 404, encapsulated layer interface.
And, step 6) adopt following sub-step,
Step 501, carries out non-self-adapting re-transmission, distributes the RB resource of same position, takies, then perform step 502 if RB resource has been retransmitted by TTI bundling, otherwise, perform step 505;
Step 502, carries out adaptive retransmission, distributes new RB position, if distribute RB success, then performs step 503, otherwise, perform step 504;
Step 503, distributes new CCE resource, if distribute CCE success, then performs step 505, otherwise, perform step 504;
Step 504, stops this time retransmitting, and informs user;
Step 505, encapsulated layer interface.
The present invention is by dispatching override by TTI bundling user retransmission resource, and can only non-self-adapting re-transmission be carried out, restriction SPS semi-persistent scheduling is in conjunction with dynamic dispatching, and non-TTI bundling user non-self-adapting retransmits combining adaptive re-transmission and solves TTI Bundling retransfer scheduling problem.Contrast prior art, beneficial features of the present invention is as follows:
1), this is used for dispatching method and the device of subframe binding, to ensure that in LTE system TTI bundling retransmits and necessarily can apply for fixing frequency domain resource, there is not the failure of retransfer scheduling application resource and cannot inform that UE stops the problem retransmitting.
2), this is used for dispatching method and the device of subframe binding, takes the mode that TTI bundling retransfer scheduling priority is the highest, does not affect existing scheduler flow process, compatible existing Scheduling Framework, feasibility is high, realizes simple, smaller to the amendment of scheduling flow.
3), this is used for dispatching method and the device of subframe binding, and only need to take non-self-adapting to retransmit, retransmission scheme is simple, does not need application CCE resource, has saved the occupancy of CCE.
4), this is used for dispatching method and the device of subframe binding, by adopting SPS semi-persistent scheduling in conjunction with dynamic dispatching, non-TTIbundling user's non-self-adapting retransmits mode that combining adaptive retransmits and solves TTI bundling and retransmit the resource conflict problem retransmitting with SPS user scheduling, non-TTI bundling user etc. and exist, implementation is simple, for not supporting that the base station scheduling flow process of TTI bundling function is without any impact, has practical value.
Accompanying drawing explanation
Fig. 1 is the dispatching method of the embodiment of the present invention and the overall flow figure of device.
Fig. 2 is used for non-self-adapting to retransmit the scheduling flow figure of rear three TTI in TTI bundling bundle that new biography or retransfer scheduling cross in the embodiment of the present invention.
Fig. 3 is used for non-self-adapting to retransmit the scheduling flow figure of rear first TTI in TTI bundling bundle in the embodiment of the present invention.
Fig. 4 is the scheduling flow figure of SPS semi-persistent scheduling or dynamic dispatching in the embodiment of the present invention.
Fig. 5 is non-TTI bundling retransfer scheduling flow chart in the embodiment of the present invention.
Embodiment
The present invention proposes non-self-adapting can only be taked to retransmit by restricted T TI bundling user, and the scheme that scheduling of resource priority is the highest, thus solve TTI bundling HARQ and retransmit the problem cannot feeding back PHICH FAKE ACK under the feedback of PHICH in sequential and uplink authorization PDCCH can not issue caused retransmission resource scheduling failure scene simultaneously.The highest by TTIbundling user's retransmission priority, SPS semi-persistent scheduling is in conjunction with dynamic dispatching, and the mode that non-TTI bundling non-self-adapting retransmits combining adaptive re-transmission solves the resource conflict problem that TTI bundling retransmits and other scheduling types exist.
See Fig. 1, embodiment institute supplying method comprises the following step:
101), according to the relevant configuration information of cell configuration or the bandwidth of cell in reshuffling, PUCCH (physical uplink control channel) and PRACH (Physical Random Access Channel) carry out initialization scheduling resource, comprise the Resourse Distribute scope determining non-TTI bundling (non-subframe binding) and TTI bundling (subframe binding) user.
102) the TTI bundling user, for new biography or re-transmission dispatched, carries out non-self-adapting HARQ retransfer scheduling to rear three TTI in a bundle (binding), distributes identical RB resource.
103), according to 101) in the Resourse Distribute scope of gained non-TTI bundling user scheduling of resource is carried out to MSG3 new biography.In LTE protocol, MSG3 is random accessing message 3.
104) the TTI bundling user, for new biography or re-transmission dispatched, the ACK/NACK information according to HARQ feedback carries out non-self-adapting HARQ retransfer scheduling to first TTI in a bundle.
105), to SPS user, semi-persistent scheduling or dynamic dispatching is carried out.
106), HARQ self adaptation or non-self-adapting retransfer scheduling are carried out to non-TTI bundling user.
107), to non-TTI bundling and TTI bundling user according to 101) in result carry out dynamic new biography scheduling.
Concrete, described step 101) in, the RB number (taking number difference under different band width configuration) that the Resourse Distribute scope of non-TTI bundling user takies according to the total bandwidth of current scheduling TTI and PUCCH, and whether have PRACH and MSG3 Resource Calculation to obtain, such as configure according to cellular PRACH, if current scheduling TTI there is PRACH resource, then scope of resource is the resource location that total bandwidth cuts PUCCH resource position and PRACH and takies, if also have MSG3 scheduling resource, also need to cut the resource location that MSG3 takies, if current scheduling TTI does not have PRACH resource or MSG3 scheduling, then total bandwidth does not need the resource location cutting PRACH or MSG3 yet.The Resourse Distribute scope of TTI bundling user is then need to evade the resource contention with PRACH and MSG3 to greatest extent, namely think that each TTI has the resource of PRACH and MSG3, cut the resource location of PUCCH configuration and the resource location that takies of PRACH according to cell configuration or the total bandwidth in reshuffling and just can calculate the Resourse Distribute scope of TTIbundling user according to the maximum resource number these three configuring the MSG3 obtained.
Concrete, described step 102) in, the TTI bundling user dispatched, in a bundle, rear three TTI non-self-adaptings retransmit, be different from the concept that the non-self-adapting in general HARQ retransmits, only need the RB distributing same position, do not need to wait for that HARQ retransmits Loop Round Trip Time, also do not need to feed back PHICH.
Concrete, described step 105) in, for SPS user, if frequency domain resource position when activating semi-persistent scheduling is not taken by TTI bundling retransfer scheduling before, then proceed semi-persistent scheduling, otherwise, SPS user can only carry out dynamic dispatching, again apply for new CCE (Control Channel Element) and RB (Resource Block) resource, solve TTI bundling by the mode of SPS dynamic dispatching and retransmit the resource conflict problem existed with SPS semi-persistent scheduling.
Concrete, described step 106) in, what non-TTI bundling user re-transmission was taked is exactly general HARQ retransmission scheme, and first non-self-adapting retransmits, then adaptive retransmission, or stops this retransmitting wait re-transmission next time.Namely for non-TTI bundling user, non-TTI bundling user first carries out non-self-adapting re-transmission when retransmitting, if the frequency domain position of new biography scheduling is before taken by TTIbundling retransfer scheduling, then non-self-adapting retransmits unsuccessfully, adaptive retransmission can be carried out, again apply for new CCE and RB resource, apply for unsuccessfully then can issuing PHICH FACK ACK, stop this time retransmitting.Retransmit combining adaptive by non-self-adapting to retransmit and issue PHICH FACK ACK and stop the mode this time retransmitting to solve TTI bundling retransmitting and retransmit with non-TTIbundling the resource conflict problem existed.
Concrete, described step 107) in, the scheduling of TTI bundling user new biography is only carried out on the TTI that subframe numbers mould 4 equals 0, only needs new biography to dispatch first TTI in a bundle, after new biography scheduling, HARQ is added to TTIbundling and retransmit in chained list 1 and retransmit in chained list 2.The present invention arranges and retransmits in chained list 1 and retransmit chained list 2, retransmit chained list 1 to be used for dispatching rear 3 TTI in a bundle, retransmit chained list 2 and be used for carrying out non-self-adapting HARQ retransfer scheduling according to the ACK/NACK information of the bundle feedback of scheduling to first TTI in bundle.
Described step 102) and step 104) in, TTI bundling carries out non-self-adapting re-transmission, identical frequency domain resource position is transmitted, and in the foremost of whole scheduling of resource, priority is the highest, there is not the scene of failures in resource application, namely eliminate TTI bundling and retransmit the situation that sequential caused re-transmission application resource unsuccessfully cannot descend PHICH (Physical Hybrid ARQIndicator Control Channel) FAKE ACK.
By the restriction of above step, the foremost dispatching sequence that TTI bundling user retransmits being placed on all scheduling types is only needed in scheduling process, and can only non-self-adapting re-transmission be carried out, restriction SPS semi-persistent scheduling is in conjunction with dynamic dispatching, and non-TTIbundling user's non-self-adapting retransmits mode that combining adaptive retransmits and just can solve TTI bundling and retransmit problem caused by unusual HARQ re-transmission.
Please refer to Fig. 1, in overall procedure 102) first in scheduler task, non-self-adapting retransmits the scheduling of rear three TTI in TTI bundling bundle that new biography or retransfer scheduling cross, and detailed process is with reference to the explanation in figure 2; Then 104) in scheduler task, carry out non-self-adapting HARQ retransfer scheduling according to the ACK/NACK information of the previous bundle feedback of HARQ to first TTI in bundle, detailed process is with reference to the explanation in figure 3.Then 105) in scheduler task to SPS user, carry out semi-persistent scheduling or dynamic dispatching, detailed process is with reference to the explanation in figure 4.Then 106) in scheduler task to non-TTI bundling user, carry out non-self-adapting re-transmission or adaptive retransmission, detailed process is with reference to the explanation in figure 5.
Please refer to Fig. 2, the concrete steps in scheduler task are as follows:
Step 201: fill in the input parameter that non-self-adapting retransmits RB distribution, the resource of RB original position and RB number and scheduled bundle first TTI of distribution is identical;
Step 202: the RB resource of distributing same position;
Step 203: encapsulated layer interface;
Step 204: determining whether that the third time in a bundle retransmits by recording number of retransmissions, if so, then being deleted from re-transmission chained list 1 by HARQ, if not then without the need to deleting, HARQ still exists in re-transmission chained list 1; Terminate.
Please refer to Fig. 3, in uplink scheduling task, concrete steps are as follows:
Step 301: the re-transmission chained list 2 traveling through the TTI bundling dispatched, performs step 302;
Step 302: if scheduling interval (sf_differ frame is poor) is greater than 16ms, then reclaim HARQ process, no longer retransmit, and what take because up is synchronous HARQ mechanism, otherwise performs step 303;
Step 303: if scheduling interval is 11ms, performs step 304, otherwise, perform step 305;
Step 304: feed back PHICH according to physical layer decoded result, the correct then feeding back ACK of decoding, decoding error then feeds back NACK, performs step 305;
Step 305: if scheduling interval is 16ms, performs step 306, otherwise, perform step 301.
Step 306: physical layer decoded result is that ACK or re-transmission reach maximum retransmission, now no longer carry out retransmission process, directly reclaim HARQ, otherwise decoded result is NACK, perform step 307.
Step 307: fill in the input that TTI bundling non-self-adapting retransmits RB, the resource of RB original position and RB number and scheduled bundle first TTI of distribution is identical, performs step 308;
Step 308: the RB resource of distributing same position;
Step 309: encapsulated layer interface;
Step 310: this HARQ of scheduling is added to TTI bundling and retransmit in chained list 1, for the re-transmission of three TTI rear in bundle.
Please refer to Fig. 4, in uplink scheduling task, concrete steps are as follows:
Step 401:SPS user first carries out semi-persistent scheduling, distributes RB resource identical when activating with SPS, takies, then perform step 402 if RB resource has been retransmitted by TTI bundling, otherwise, perform step 404;
Step 402: now step 401 distributes failure, need carry out SPS dynamic dispatching, and this step redistributes new RB resource, performs step 403;
Step 403: now step 401 distributes failure, need carry out SPS dynamic dispatching, and this step distributes new CCE resource, performs step 404;
Step 404: encapsulated layer interface.
Please refer to Fig. 5, in uplink scheduling task, concrete steps are as follows:
Step 501: general HARQ retransmits, and namely non-TTI bundling retransmits, and first carries out non-self-adapting re-transmission, distributes the RB resource of same position, takies if RB resource has been retransmitted by TTI bundling, then performs step 502, otherwise, perform step 505;
Step 502: now non-self-adapting retransmits and distributes RB failure, carries out adaptive retransmission, distributes new RB position, if distribute RB success, then performs step 503, otherwise, perform step 504;
Step 503: adaptive retransmission needing to distribute new CCE resource, informing that user retransmits in new RB resource for issuing uplink authorization PDCCH after distributing new RB success, if distribute CCE success, then performs step 505, otherwise, perform step 504;
Step 504: adaptive retransmission distributes the failure of RB or CCE resource, then need to stop this time retransmitting, and inform user by issuing PHICHFAKE ACK;
Step 505: encapsulated layer interface.
During concrete enforcement, above method can adopt software engineering to realize automatically running, and modular mode also can be adopted to realize.The present invention is also corresponding provides a kind of dispatching device for subframe binding in LTE system, comprises with lower module:
Initialization module, for the relevant configuration information initialization scheduling resource according to cell configuration or the bandwidth of cell in reshuffling and PUCCH and PRACH, comprises the Resourse Distribute scope of non-TTI bundling user and TTI bundling user; Described PUCCH is physical uplink control channel, and described PRACH is Physical Random Access Channel, and described TTI bundling is subframe binding;
First scheduler module, for the TTI bundling user dispatched for new biography or re-transmission, carries out non-self-adapting HARQ retransfer scheduling to three TTI rear in a bundle, distributes identical RB resource; For the TTI bundling user dispatched, when three TTI non-self-adaptings rear in a bundle are retransmitted, only need the RB distributing same position; Described bundle is binding, and described HARQ is hybrid automatic repeat-request, and described RB is Resource Block;
Second scheduler module, for carrying out scheduling of resource according to the Resourse Distribute scope of the non-TTI bundling user of gained in initialization module to MSG3 new biography, described MSG3 is random accessing message 3;
3rd scheduler module, for the TTI bundling user dispatched for new biography or re-transmission, the ACK/NACK information according to HARQ feedback carries out non-self-adapting HARQ retransfer scheduling to first TTI in a bundle; Described ACK is confirmation, and described NACK is unacknowledged information;
4th scheduler module, for SPS user, carries out semi-persistent scheduling or dynamic dispatching, comprise and first carry out semi-persistent scheduling, distribute RB resource identical when activating with SPS, take if RB resource is not retransmitted by TTI bundling, then proceed semi-persistent scheduling, otherwise carry out dynamic dispatching; Described SPS is semipermanent scheduling;
5th scheduler module, for carrying out HARQ self adaptation or non-self-adapting retransfer scheduling to non-TTI bundling user, comprising and first carrying out non-self-adapting retransfer scheduling, if failure, then carries out adaptive retransmission scheduling, or stops this retransmitting wait re-transmission next time;
6th scheduler module, for carrying out dynamic new biography scheduling to non-TTI bundling and TTI bundling user according to the result in initialization module.
For ease of understanding for the purpose of the technology of the present invention effect, provide the example of application embodiment of the present invention technical scheme: bandwidth of cell
the RB number that PUCCH takies
the original position n of PRACH
prach=3, the SPS cycle is 20ms, is 12 according to the maximum RB number of band width configuration restriction MSG3, at this moment, the range of distribution of what in upstream band, PRACH took is 3 to No. 8 RB, MSG3 is 9 to No. 20 RB, and so the Resourse Distribute scope of TTI bundling is 21 to No. 46 RB.Suppose, in subframe 0, SPS user's semi-persistent scheduling takies 22 to No. 24 RB, subframe 4 there is TTI bundling scheduling user data, take 21 to No. 23 RB, subframe 12 there is non-TTI bundling scheduling user data, take 21 to No. 30 RB, as can be seen here, three kinds of users have the RB of coincidence in the resource that the different moment dispatches, so, subframe 5, 6, first non-self-adapting is needed to retransmit the data of TTI bundling user on 7, this dispatching priority is the highest, so necessarily 21 to No. 23 RB can be assigned to, if TTI bundling user data is decoded unsuccessfully, then need to retransmit in subframe 20, non-TTIbundling user data is also decoded failure, also need retransmit in subframe 20, visible, in subframe 20, there is resource contention in SPS semi-persistent scheduling and TTI bundling and non-TTI bundling user retransfer scheduling, according to the implementation of the embodiment of the present invention, in subframe 20, TTI bundling retransmission priority is the highest, first distribute RB resource, take 21 to No. 23 RB, then, SPS semi-persistent scheduling distributes original 22 to No. 24 RB, find by TTI bundling CU, then carry out SPS dynamic dispatching, redistribute as 24 to No. 26 RB, and need to redistribute CCE resource, issue uplink authorization PDCCH and inform that SPS user is transmitted on frequency domain resource 24 to No. 26 RB, and then carry out the re-transmission of non-TTI bundling user data, non-self-adapting retransmits distribution 21 to No. 30 RB, find to be taken by TTI bundling re-transmission and SPS data, then adaptive retransmission, redistribute as 27 to 36RB, and distribute CCE resource, if success, then issue uplink authorization PDCCH and inform user, otherwise, need to issue PHICH FAKE ACK and inform that user stops this time retransmitting, wait for next retransmission opportunity.Thus avoid the problem that TTI bundling re-transmission Resources allocation unsuccessfully cannot descend FAKE ACK, because necessarily identical resource can be assigned to by non-self-adapting, solve TTI bundling retransmit with other data dispatch as SPS semi-persistent scheduling and non-TTIbundling retransmit existing for resource conflict problem.
Visible, the present invention is by restricted T TI bundling Resourse Distribute scope, adopt non-self-adapting to retransmit and principle preferential on dispatching sequence to TTI bundling user, the scheme in conjunction with non-TTI bundling user non-self-adapting or adaptive retransmission and SPS dynamic dispatching solves resource contention that TTI bundling user retransfer scheduling and other user scheduling exist and TTIbundling and retransmits PHICH FAKE ACK unsuccessfully cannot be descended to inform the problem that user stops this and retransmits.
Above content is in conjunction with concrete execution mode further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. for a dispatching method for subframe binding in LTE system, it is characterized in that, comprise following steps:
1), according to the relevant configuration information initialization scheduling resource of cell configuration or the bandwidth of cell in reshuffling and PUCCH and PRACH, the Resourse Distribute scope determining non-TTI bundling user and TTI bundling user is comprised; Described PUCCH is physical uplink control channel, and described PRACH is Physical Random Access Channel, and described TTI bundling is subframe binding;
2) the TTI bundling user, for new biography or re-transmission dispatched, carries out non-self-adapting HARQ retransfer scheduling to three TTI rear in a bundle, distributes identical RB resource; For the TTI bundling user dispatched, when three TTI non-self-adaptings rear in a bundle are retransmitted, only need the RB distributing same position; Described bundle is binding, and described HARQ is hybrid automatic repeat-request, and described RB is Resource Block;
3), according to the Resourse Distribute scope of the non-TTI bundling user of gained in step 1) carry out scheduling of resource to MSG3 new biography, described MSG3 is random accessing message 3;
4) the TTI bundling user, for new biography or re-transmission dispatched, the ACK/NACK information according to HARQ feedback carries out non-self-adapting HARQ retransfer scheduling to first TTI in a bundle; Described ACK is confirmation, and described NACK is unacknowledged information;
5), to SPS user, carry out semi-persistent scheduling or dynamic dispatching, comprise and first carry out semi-persistent scheduling, distribute RB resource identical when activating with SPS, if RB resource is not retransmitted by TTI bundling and takies, then proceed semi-persistent scheduling, otherwise carry out dynamic dispatching; Described SPS is semipermanent scheduling;
6), to non-TTI bundling user carry out HARQ self adaptation or non-self-adapting retransfer scheduling, comprise and first carry out non-self-adapting retransfer scheduling, if failure, then carry out adaptive retransmission scheduling, or stop this retransmitting wait re-transmission next time;
7), according to the result in step 1), dynamic new biography scheduling is carried out to non-TTI bundling and TTI bundling user.
2. the retransfer scheduling method for TTI bundling in LTE system according to claim 1, is characterized in that: step 2) adopt following sub-step,
Step 201, fill in the input parameter that non-self-adapting retransmits RB distribution, the resource of RB original position and RB number and scheduled bundle first TTI of distribution is identical;
Step 202, distributes the RB resource of same position;
Step 203, encapsulated layer interface;
Step 204, the third time determined whether in a bundle by record number of retransmissions is retransmitted, and is if so, then deleted from re-transmission chained list 1 by HARQ, if not then HARQ still exists in re-transmission chained list 1.
3. the retransfer scheduling method for TTI bundling in LTE system according to claim 1, is characterized in that: step 4) adopts following sub-step,
Step 301, travels through the re-transmission chained list 2 of the TTI bundling dispatched, and performs step 302;
Step 302, if scheduling interval is greater than 16ms, then reclaims HARQ process, no longer carries out retransmitting otherwise performing step 303;
Step 303, if scheduling interval is 11ms, performs step 304, otherwise, perform step 305;
Step 304, feeds back PHICH according to physical layer decoded result, performs step 305; Described PHICH is physical mixed automatic re-transmission indicating channel;
Step 305, if scheduling interval is 16ms, performs step 306, otherwise, perform step 301;
Step 306, physical layer decoded result is that ACK or re-transmission reach maximum retransmission, now no longer carry out retransmission process, directly reclaim HARQ, otherwise decoded result is NACK, perform step 307;
Step 307, fill in the input that TTI bundling non-self-adapting retransmits RB, the resource of RB original position and RB number and scheduled bundle first TTI of distribution is identical, performs step 308;
Step 308, distributes the RB resource of same position;
Step 309, encapsulated layer interface;
Step 310, adds TTI bundling to and retransmits in chained list 1, for the re-transmission of three TTI rear in bundle by this HARQ of scheduling.
4. the retransfer scheduling method for TTI bundling in LTE system according to claim 1, is characterized in that: step 5) adopts following sub-step,
Step 401, SPS user first carries out semi-persistent scheduling, distributes RB resource identical when activating with SPS, takies, then perform step 402 if RB resource has been retransmitted by TTI bundling, otherwise, perform step 404;
Step 402, for carrying out SPS dynamic dispatching, redistributes new RB resource, performs step 403;
Step 403, for carrying out SPS dynamic dispatching, distributes new CCE resource, performs step 404;
Step 404, encapsulated layer interface.
5. the retransfer scheduling method for TTI bundling in LTE system according to claim 1, is characterized in that: step 6) adopts following sub-step,
Step 501, carries out non-self-adapting re-transmission, distributes the RB resource of same position, takies, then perform step 502 if RB resource has been retransmitted by TTI bundling, otherwise, perform step 505;
Step 502, carries out adaptive retransmission, distributes new RB position, if distribute RB success, then performs step 503, otherwise, perform step 504;
Step 503, distributes new CCE resource, if distribute CCE success, then performs step 505, otherwise, perform step 504;
Step 504, stops this time retransmitting, and informs user;
Step 505, encapsulated layer interface.
6. for a dispatching device for subframe binding in LTE system, it is characterized in that, comprise with lower module:
Initialization module, for the relevant configuration information initialization scheduling resource according to cell configuration or the bandwidth of cell in reshuffling and PUCCH and PRACH, comprises the Resourse Distribute scope of non-TTI bundling user and TTI bundling user; Described PUCCH is physical uplink control channel, and described PRACH is Physical Random Access Channel, and described TTI bundling is subframe binding;
First scheduler module, for the TTI bundling user dispatched for new biography or re-transmission, carries out non-self-adapting HARQ retransfer scheduling to three TTI rear in a bundle, distributes identical RB resource; For the TTI bundling user dispatched, when three TTI non-self-adaptings rear in a bundle are retransmitted, only need the RB distributing same position; Described bundle is binding, and described HARQ is hybrid automatic repeat-request, and described RB is Resource Block;
Second scheduler module, for carrying out scheduling of resource according to the Resourse Distribute scope of the non-TTI bundling user of gained in initialization module to MSG3 new biography, described MSG3 is random accessing message 3;
3rd scheduler module, for the TTI bundling user dispatched for new biography or re-transmission, the ACK/NACK information according to HARQ feedback carries out non-self-adapting HARQ retransfer scheduling to first TTI in a bundle; Described ACK is confirmation, and described NACK is unacknowledged information;
4th scheduler module, for SPS user, carries out semi-persistent scheduling or dynamic dispatching, comprise and first carry out semi-persistent scheduling, distribute RB resource identical when activating with SPS, take if RB resource is not retransmitted by TTI bundling, then proceed semi-persistent scheduling, otherwise carry out dynamic dispatching; Described SPS is semipermanent scheduling;
5th scheduler module, for carrying out HARQ self adaptation or non-self-adapting retransfer scheduling to non-TTI bundling user, comprising and first carrying out non-self-adapting retransfer scheduling, if failure, then carries out adaptive retransmission scheduling, or stops this retransmitting wait re-transmission next time;
6th scheduler module, for carrying out dynamic new biography scheduling to non-TTI bundling and TTI bundling user according to the result in initialization module.
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