CN104243108A - Uplink hybrid automatic retransmission request feedback method, device and system - Google Patents
Uplink hybrid automatic retransmission request feedback method, device and system Download PDFInfo
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Abstract
The invention provides an uplink hybrid automatic retransmission request feedback method, a device and system and relates to the field of wireless communication. The uplink hybrid automatic retransmission request feedback method, device and system solve the problem that eNB can not instruct UE not to redistribute new PUSCH resources for HARQ process. The method includes the steps that the eNB receives a PUSCH data transmission block sent by the UE and carries out CRC, and after the CRC is completed, the eNB dispatches a downlink subframe corresponding to a next retransmission subframe of the PUSCH data transmission block to send ePDCCH and instructs the UE not to distribute new PUSCH resources for the HARQ process. The uplink hybrid automatic retransmission request feedback method, device and system are suitable for an LTE system and an A-LTE system and enable the HARQ mechanism based on the ePDCCH to be achieved.
Description
Technical field
The present invention relates to wireless communication field, particularly relate in a kind of mobile communication system, utilize the uplink hybrid automatic repeat request feedback method of ePDCCH channel, device and system.
Background technology
At Long Term Evolution (Long Term Evolution, LTE) Long Term Evolution (the Long Term Evolution-Advanced of standard and enhancing, LTE-A) in standard evolution, hybrid automatic repeat-request (the Hybrid Automatic Repeat request of uplink business data block, HARQ) feedback is base station (evolved Node B, evolved Node B, eNB) by Physical HARQ Indicator Channel (Physical HARQ Indicator Channel, PHICH) channel is to subscriber equipment (User Equipment, UE) acknowledge character/Negative Acknowledgement character (Acknowledgement/Negative Acknowledgement, ACK/NACK) information.If the uplink data block that UE sends correctly is received by eNB, so eNB will at PHICH channel to UE feeding back ACK information.Otherwise if the uplink data block that UE sends correctly is not received by eNB, so this uplink data block can adopt synchronous non-self-adapting to retransmit, and synchronous self-adapting also can be adopted to retransmit.In FDD LTE system, the sequential relationship of uplink scheduling HARQ as shown in Figure 1.If uplink business data block adopts synchronous non-self-adapting to retransmit, so eNB transmits nack message by PHICH channel to UE; And if uplink business data block adopts synchronous self-adapting to retransmit, eNB then can pass through Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) PDCCH(enhanced PDCCH, the ePDCCH of channel or enhancing) the retransfer scheduling control information of this re-transmitting data block is transmitted to UE.
In LTE system networking, the reception accuracy for HARQ feedback on PHICH channel requires very high, and object avoids unnecessary data re-transmission and causes ascending resource to waste, or avoid factor data block do not retransmit in time and the phenomenon of packet loss occurs.But PHICH channel can be subject to the interference of neighbor cell, so the quality of reception of UE on PHICH channel will decline, and the accuracy that UE receives HARQ feedback on PHICH channel is difficult to ensure.Especially, in LTE standard and the evolution of LTE-A standard, in order to elevator system throughput, especially in order to improve the throughput of hot zones, introduce heterogeneous network (Heterogeneous Network, HetNet) group-network construction, as shown in Figure 2, disposes a large amount of micro-station to promote service quality and the throughput of hot zones in macro station coverage.For the networking structure of HetNet, because macro station and micro-station are same overlay areas, the transmitting power of macro station is far longer than the transmitting power at micro-station simultaneously, so macro station will inevitably be caused the strong jamming at micro-station, the control channel at especially micro-station will be subject to even more serious interference.Therefore, in HetNet network, the quality of reception of PHICH channel and performance will worsen more, the probability made a mistake to the ACK/NACK that UE feeds back by PHICH channel in micro-station will sharply increase, thus cause data block retransmissions unnecessary in a large number, or factor data block is caused not retransmitted in time and the phenomenon of a large amount of packet loss occurs.
In order to better ensure the transmission quality of the control information at micro-station, the 3rd generation partner program (3
rdgeneration Partnership Project, 3GPP) standard R11(Release11) introduce ePDCCH channel in version.The effect of the PDCCH of ePDCCH and 3GPP standard R8/9 version is the same with object, may be used for Physical Downlink Shared Channel (the Physical downlink Shared Channel of UE, PDSCH) or Physical Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH) schedule information instruction.But, the PDCCH/PHICH resource location of ePDCCH and 3GPP standard R8/9 version is different, ePDCCH no longer sends in the control area of backward compatibility carrier wave, but adopt frequency division multiplexing (Frequency Division Multiplexing, FDM) mode and PDSCH share the data area used in 3GPP standard R8/9, for sending Downlink Control Information (Downlink Control Information, DCI) information; In addition, ePDCCH also no longer adopts cell reference signals (Cell-specific Reference Signal, CRS) to carry out demodulation, but adopts demodulated reference signal (Demodulation Reference Signal, DMRS) to carry out demodulation.
Therefore, compared to PDCCH channel and PHICH channel, ePDCCH has following advantage: the first, and not by the capacity limit of control area in 3GPP standard R8/9, the capacity of ePDCCH is larger; The second, adopt DMRS demodulation, ePDCCH can adopt the mode of wave beam forming to launch, and improves the detection perform of receiving terminal; 3rd, adopt DMRS demodulation, especially, under HetNet networking scene, the down control channel at micro-station can avoid the strong jamming of macro station CRS, improves precision of channel estimation; Four, ePDCCH can use frequency domain ICIC(Inter Cell interference coordination Inter-Cell Interference Coordination) technology, improves the quality of reception of Cell Edge User; Five: ePDCCH can adopt frequency domain selectivity to dispatch (Frequency Selected Schedule, FSS), can improve spectrum efficiency and transmission performance; 6th, PHICH(cannot be sent as new carrier type (New Carrier Type at eNB, NCT) downstream signal demodulation can only be carried out by DMRS in) or cannot send PHICH in time time (as macro station sends CRS and micro-station does not send CRS, and be non-ideal Backhaul between grand micro-station, namely grand micro-between Backhaul propagation delay time larger time), need micro-station by ePDCCH channel to UE transmitting scheduling information instruction or adaptive retransmission scheduling instruction; Especially the data block retransmissions for up PUSCH channel is sync retransmission, ACK/NACK feedback time is timing feedback, therefore, when or cannot sending HARQ feedback by PHICH channel to UE in time, eNB can dispatch the re-transmitting data block of PUSCH channel by ePDCCH channel.
In the Article 6 advantage of above-mentioned ePDCCH, if eNB carries out synchronous self-adapting re-transmission or dispatches the new data block of this HARQ process in the descending retransfer scheduling subframe that PUSCH is corresponding, so when sending or PHICH cannot be sent in time, ePDCCH can be utilized to carry out PUSCH adaptive retransmission or dispatch new data block.Except this situation, if eNB cannot send or cannot send PHICH in time, will go wrong.Such as: if eNB correctly receives the PUSCH transmission block of UE and eNB no longer dispatches the new biography data block of this HARQ process, eNB does not redistribute new PUSCH resource again for this HARQ process in other words.To sum up, there is eNB in existing HARQ implementation cannot indicate UE to be no longer the problem that HARQ process redistributes new PUSCH resource again.
Summary of the invention
The invention provides the methods, devices and systems of a kind of uplink hybrid automatic repeat request feedback, solve eNB and UE cannot be indicated not to be the problem that HARQ process redistributes new PUSCH resource again.
A method for uplink hybrid automatic repeat request feedback, comprising:
ENB receives the PUSCH transmission data block that UE sends, and carries out CRC check;
After completing CRC check, described eNB sends ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, indicates described UE to be no longer the PUSCH resource that HARQ course allocation is new.
2, uplink hybrid automatic repeat request feedback method according to claim 1, is characterized in that, described eNB sends ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block and comprises:
Described eNB fills particular bit string in the resource block assignments of described ePDCCH and frequency-hopping resource position instruction (Resource block assignment and hopping resource allocation) territory field, the value of described particular bit string exceeds the position range of normal resource distribution, and described special string number of bits is the number of bits of described Resource block assignment and hopping resource allocation territory field;
Described eNB sends described ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block to described UE, indicates eNB described in described UE correctly to receive described PUSCH data block and discharges the current HARQ process resource taken of described UE.
Preferably, described eNB comprises at the upper corresponding descending sub frame transmission ePDCCH once retransmitting subframe of execution cost PUSCH transmission data block:
Described eNB fills invalid Bit String in the Resource block assignment and hopping resource allocation territory field of ePDCCH, and the bit value in NDI territory on the DCI carried by described ePDCCH is set to the value in NDI territory when to send ePDCCH with the last time overturn;
Described eNB sends described ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block to described UE, indicates eNB described in described UE correctly to receive described PUSCH data block and discharges the current HARQ process resource taken of described UE.
Preferably, described eNB comprises at the upper corresponding descending sub frame transmission ePDCCH once retransmitting subframe of execution cost PUSCH transmission data block:
Channel status information reports (CSI report) territory of the Downlink Control Information (DCI) that described eNB carries at ePDCCH indicates described UE to report CSI, and the bit number that Resource block assignment and hopping resource allocation territory in described DCI and adjustment encoding scheme and redundancy versions (Modulation and coding scheme and redundancy version) distribute to the PRB number of described UE and transmission block size (TBS) corresponding to MCS grade is less than the minimum number bits that described UE reports CSI needs, and the bit value in NDI territory on the DCI carried by described ePDCCH is set to the value in NDI territory when to send ePDCCH with the last time overturn,
Described eNB sends described ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block to described UE, indicates eNB described in described UE correctly to receive described PUSCH data block and discharges the current HARQ process resource taken of described UE.
Present invention also offers a kind of uplink hybrid automatic repeat request feedback method, comprising:
UE sends PUSCH transmission data block to eNB;
Described UE receives the ePDCCH that described eNB sends at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, indicates described UE to be no longer the PUSCH resource that HARQ course allocation is new.
Preferably, described UE also comprises after receiving the step of the ePDCCH that described eNB sends at the corresponding descending sub frame that execution cost PUSCH transmission data block upper once retransmits subframe:
The particular bit string of the position range that normal resource is distributed is exceeded in the Resource block assignment and hopping resource allocation territory field existence value of described ePDCCH, and special string number of bits is when being the number of bits of Resource block assignment and hopping resource allocation territory field, described UE judges that described eNB correctly receives described PUSCH data block, and discharges the current HARQ process resource taken of described UE.
Preferably, described UE also comprises after receiving the step of the ePDCCH that described eNB sends at the corresponding descending sub frame that execution cost PUSCH transmission data block upper once retransmits subframe:
Invalid Bit String is filled with in the Resource block assignment and hopping resource allocation territory field of described ePDCCH, and the bit value in NDI territory on the DCI of described ePDCCH carrying is when being set to the value in NDI territory when to send ePDCCH with the last time overturn, described UE judges that described eNB correctly receives described PUSCH data block, and discharges the current HARQ process resource taken of described UE.
Preferably, described UE also comprises after receiving the step of the ePDCCH that described eNB sends at the corresponding descending sub frame that execution cost PUSCH transmission data block upper once retransmits subframe:
The CSI report territory of the DCI carried at described ePDCCH indicates described UE to report CSI, and the bit number that Resource block assignment and hopping resource allocation territory in described DCI and adjustment encoding scheme and redundancy versions (Modulation and coding scheme and redundancy version) distribute to the PRB number of described UE and transmission block size (TBS) corresponding to MCS grade is less than the minimum number bits that described UE reports CSI needs, and the bit value in NDI territory on the DCI carried by described ePDCCH is when being set to the value in NDI territory when to send ePDCCH with the last time overturn, described UE judges that described eNB correctly receives described PUSCH data block, and discharge the current HARQ process resource taken of described UE.
Present invention also offers a kind of uplink hybrid automatic repeat request feedback device, comprising:
Data reception module, for receiving the PUSCH transmission data block that UE sends, and carries out CRC check;
DCI information is filled and ePDCCH sending module, for after completing CRC check, sends ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, indicates described UE to be no longer the PUSCH resource that HARQ course allocation is new.
Preferably, described DCI information filling and ePDCCH sending module comprise:
First dispensing unit, particular bit string is filled for the Resource block assignment and hopping resource allocation territory field at described ePDCCH, the value of described particular bit string exceeds the position range of normal resource distribution, and described special string number of bits is the number of bits of described Resource block assignment and hopping resource allocation territory field;
First transmitting element, send described ePDCCH for the upper corresponding descending sub frame once retransmitting subframe in execution cost PUSCH transmission data block to described UE, indicate described UE correctly to receive described PUSCH data block and discharge the current HARQ process resource taken of described UE.
Preferably, described DCI information filling and ePDCCH sending module also comprise:
Second dispensing unit, fill invalid Bit String for the Resource block assignment and hopping resource allocation territory field at ePDCCH, and the bit value in NDI territory on the DCI carried by described ePDCCH is set to the value in NDI territory when to send ePDCCH with the last time overturn;
Second transmitting element, send described ePDCCH for the upper corresponding descending sub frame once retransmitting subframe in execution cost PUSCH transmission data block to described UE, indicate described UE correctly to receive described PUSCH data block and discharge the current HARQ process resource taken of described UE.
Preferably, described DCI information filling and ePDCCH sending module also comprise:
3rd dispensing unit, CSI report territory for the DCI carried at ePDCCH indicates described UE to report CSI, and the bit number that Resource block assignment and hopping resource allocation territory in described DCI and Modulation and coding scheme and redundancy version distribute to the PRB number of described UE and TBS corresponding to MCS grade is less than the minimum number bits that described UE reports CSI needs, and the bit value in NDI territory on the DCI carried by described ePDCCH is set to the value in NDI territory when to send ePDCCH with the last time overturn,
3rd transmitting element, send described ePDCCH for the upper corresponding descending sub frame once retransmitting subframe in execution cost PUSCH transmission data block to described UE, indicate described UE correctly to receive described PUSCH data block and discharge the current HARQ process resource taken of described UE.
Present invention also offers a kind of uplink hybrid automatic repeat request feedback device, comprising:
Data transmission blocks, for sending PUSCH transmission data block to eNB;
EPDCCH receiver module, for receiving the ePDCCH that described eNB sends at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, indicates described UE to be no longer the PUSCH resource that HARQ course allocation is new.
Preferably, this device also comprises:
DCI separates read through model, for exceeding the particular bit string of the position range that normal resource is distributed in the Resource block assignment and hopping resource allocation territory field existence value of described ePDCCH, and special string number of bits is when being the number of bits of Resource block assignment and hopping resource allocation territory field, judge that described eNB correctly receives described PUSCH data block, and discharge the current HARQ process resource taken of described UE.
Preferably, described DCI separates read through model, also be filled with invalid Bit String for the Resource block assignment and hopping resource allocation territory field at described ePDCCH, and the bit value in NDI territory on the DCI of described ePDCCH carrying is when being set to the value in NDI territory when to send ePDCCH with the last time overturn, judge that described eNB correctly receives described PUSCH data block, and discharge the current HARQ process resource taken of described UE.
Preferably, described DCI separates read through model, CSI report territory also for the DCI carried at described ePDCCH indicates described UE to report CSI, and the bit number that Resource block assignment and hopping resource allocation territory in described DCI and Modulation and coding scheme and redundancy version distribute to the PRB number of described UE and TBS corresponding to MCS grade is less than the minimum number bits that described UE reports CSI needs, and the bit value in NDI territory on the DCI carried by described ePDCCH is when being set to the value in NDI territory when to send ePDCCH with the last time overturn, described UE judges that described eNB correctly receives described PUSCH data block, and discharge the current HARQ process resource taken of described UE.
Present invention also offers a kind of uplink hybrid automatic repeat request reponse system, comprise eNB and UE;
Described eNB, for receiving the PUSCH transmission data block that described UE sends, and carry out CRC check, after completing CRC check, send ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, indicate described UE to be no longer the PUSCH resource that HARQ course allocation is new;
Described UE, for sending PUSCH transmission data block to described eNB, and receive the upper ePDCCH that once retransmit the corresponding descending sub frame transmission of subframe of described eNB in execution cost PUSCH transmission data block, indicate described UE to be no longer the PUSCH resource that HARQ course allocation is new.
The invention provides the method for a kind of uplink hybrid automatic repeat request feedback, eNB receives the PUSCH transmission data block that UE sends, and carry out CRC check, after completing CRC check, described eNB sends ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, notify that UE does not redistribute new PUSCH resource again for HARQ process by ePDCCH, achieve the HARQ mechanism based on ePDCCH, solve eNB and UE cannot be indicated not to be the problem that HARQ process redistributes new PUSCH resource again.
Accompanying drawing explanation
Fig. 1 is the HARQ sequential relationship of uplink scheduling;
Fig. 2 is the structural representation of HetNet;
The flow chart of a kind of uplink hybrid automatic repeat request feedback method that Fig. 3 provides for embodiments of the invention one;
The flow chart of the scheduling of eNB side and HARQ feedback process in a kind of uplink hybrid automatic repeat request feedback method that Fig. 4 provides for embodiments of the invention two;
In a kind of uplink hybrid automatic repeat request feedback method that Fig. 5 provides for embodiments of the invention two, UE side is scheduled and receives the flow chart of HARQ feedback process;
The flow chart of the scheduling of eNB side and HARQ feedback process in a kind of uplink hybrid automatic repeat request feedback method that Fig. 6 provides for embodiments of the invention three;
In a kind of uplink hybrid automatic repeat request feedback method that Fig. 7 provides for embodiments of the invention three, UE side is scheduled and receives the flow chart of HARQ feedback process;
The structural representation of a kind of uplink hybrid automatic repeat request feedback device that Fig. 8 provides for embodiments of the invention four;
Fig. 9 is the structural representation of the filling of DCI information and ePDCCH sending module 802 in Fig. 8;
The structural representation of another uplink hybrid automatic repeat request feedback device that Figure 10 provides for embodiments of the invention four.
Embodiment
Cannot send at eNB or PHICH cannot be sent in time, if eNB correctly receives the PUSCH transmission block of UE and eNB no longer dispatches the new biography data block of this HARQ process, eNB does not redistribute new PUSCH resource again for this HARQ process in other words, eNB this how to reach this object by ePDCCH.In current R10/11 standard, do not support ePDCCH channel separately to the scheme of UE feeding back ACK information.
In order to solve the problem, The embodiment provides a kind of ePDCCH of utilization and carry out the independent uplink hybrid automatic repeat request feedback method to UE feeding back ACK, device and system, indicate PUSCH transmission block to be correctly received by the special identifier of some field in ePDCCH channel and discharge this HARQ process resource, solving eNB and UE cannot be indicated to be no longer the problem that HARQ process redistributes new PUSCH resource again.
Hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.
First by reference to the accompanying drawings, embodiments of the invention one are described.
Embodiments provide a kind of uplink hybrid automatic repeat request feedback method, solve eNB and UE cannot be indicated to be no longer the problem that HARQ process redistributes new PUSCH resource again, embodiment as shown in Figure 3, comprising:
Step 301:UE sends PUSCH transmission data block at subframe n;
Step 302:eNB receives PUSCH transmission data block at subframe n, and carries out Cyclic Redundancy Check;
Step 303:eNB sends ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of this PUSCH transmission data block of scheduling;
In this step, after completing CRC check, eNB sends ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, indicates described UE to be no longer the PUSCH resource that HARQ course allocation is new.Concrete, when eNB correctly receives a upper PUSCH transmission block, and when judging not dispatch the new biography PUSCH transmission block of this HARQ process in the upper once re-transmission subframe of this transmission block, this eNB ePDCCH DCI in fill special identifier, correctly receive described PUSCH data block to indicate eNB described in UE and discharge the current HARQ process resource taken of described UE.In this step, in the DCI of described ePDCCH, the special identifier implementation of some field includes but not limited to following methods:
Method one:
Particular bit string is filled in resource block assignments and frequency-hopping resource position instruction (Resource block assignment and hopping resource allocation) territory field, the value of this particular bit string exceeds the position range (namely this special string cannot indicate the resource location of PUSCH channel) of normal resource distribution, and this special string number of bits is the number of bits of Resource block assignment and hopping resource allocation territory field.And defining being designated of this special string: eNB correctly receives PUSCH data block and discharges this HARQ process resource.
Method two:
On the DCI of ePDCCH carrying, invalid nonuniformity control information is filled in other territories except NDI, and the bit value in the NDI territory on the DCI carried at ePDCCH and last time DCI the value in NDI territory overturn.The specific implementation of described nonuniformity control information includes but not limited to following two kinds of modes:
1) fill invalid Bit String in Resource block assignment and hopping resource allocation territory field, namely the value of this Bit String can not be understood according to agreement, cannot indicate Resources allocation position;
2) channel condition information (the Channel State Information of DCI, CSI) report that (report) territory instruction UE reports CSI information, but the bit number that the PRB number of UE and transmission block size (Transmission Block Size, TBS) corresponding to MCS grade are distributed in the Resource block assignment and hopping resource allocation territory in DCI and adjustment encoding scheme and redundancy versions (Modulation and coding scheme and redundancy version) territory is less than the minimum number bits that UE reports CSI needs.
Preferably, eNB and UE arranges the implication of various character string in the field of described Resource block assignment and hopping resource allocation territory in advance.
Step 304:UE receives this ePDCCH, and CRC result is correct, so when some field of DCI contains special identifier, this special identifier will be read as eNB and correctly receive a upper PUSCH transmission block by UE, and do not dispatch the new biography PUSCH data block of this HARQ process, therefore UE informs that MAC layer transmission block is correctly received, but can not send PUSCH new biography data block on the sub-frame of uplink that ePDCCH scheduling instruction is corresponding.In the DCI of ePDCCH involved in the embodiment of the present invention, the specific implementation of the special identifier of some field includes but not limited to following methods:
Method one:
Particular bit string is filled in resource block assignments and frequency-hopping resource position instruction (Resource block assignment and hopping resource allocation) territory field, the value of this particular bit string exceeds the position range (namely this special string cannot indicate the resource location of PUSCH channel) of normal resource distribution, and this special string number of bits is the number of bits of Resource block assignment and hopping resource allocation territory field.And defining being designated of this special string: eNB correctly receives PUSCH data block and discharges this HARQ process resource.
Method two:
On the DCI of ePDCCH carrying, invalid nonuniformity control information is filled in other territories except NDI, and the bit value in the NDI territory on the DCI carried at ePDCCH and last time DCI the value in NDI territory overturn.The specific implementation of described nonuniformity control information includes but not limited to following two kinds of modes:
1) in Resource block assignment and hopping resource allocation(resource block assignments and the instruction of frequency-hopping resource position) territory field fills invalid Bit String, namely the value of this Bit String can not be understood according to agreement, cannot indicate Resources allocation position;
2) channel condition information (the Channel State Information of DCI, CSI) report that (report) territory instruction UE reports CSI information, but the bit number that the PRB number of UE and transmission block size (Transmission Block Size, TBS) corresponding to MCS grade are distributed in the Resource block assignment and hopping resource allocation territory in DCI and adjustment encoding scheme and redundancy versions (Modulation and coding scheme and redundancy version) territory is less than the minimum number bits that UE reports CSI needs.
Below in conjunction with accompanying drawing, embodiments of the invention two are described.
Embodiments provide a kind of uplink hybrid automatic repeat request feedback method, solve eNB and UE cannot be indicated to be no longer the problem that HARQ process redistributes new PUSCH resource again, embodiment is as follows:
One, eNB side:
As shown in Figure 4, the ACK for PUSCH transmission block feeds back, and eNB does not dispatch the new biography PUSCH data block of this HARQ process.Now, eNB fills special Bit String by the Resource block assignment and hopping resource allocation territory field on the DCI that carries at ePDCCH, the value of this Bit String exceeds the position range of normal resource distribution, namely this special string cannot indicate the resource location of PUSCH channel, and this special string number of bits is the number of bits of Resource block assignment and hopping resource allocation territory field.And the implication defining this special string is: eNB correctly receives PUSCH data block and discharges this HARQ process resource.This special string implication can be arranged in advance by eNB side and UE side.
Two, UE side:
As shown in Figure 5, UE receives ePDCCH, when after correct detection ePDCCH channel, understands DCI.
If field is special Bit String in Resource block assignment and hopping resource allocation territory, the value of this Bit String cannot indicate the resource location of PUSCH channel, and this special string number of bits is the number of bits of Resource block assignment and hopping resource allocation territory field.Being designated of this special string: eNB correctly receives PUSCH data block and discharges this HARQ process resource.So UE is read as eNB and correctly receives a PUSCH transmission block, and do not dispatch re-transmission PUSCH transmission block or the new biography PUSCH data block of this HARQ process, therefore UE informs that MAC layer transmission block is correctly received, and does not need to send PUSCH data block on the sub-frame of uplink that DCI0 is corresponding.
The technical scheme that the embodiment of the present invention provides can solve eNB and ePDCCH cannot be utilized to indicate separately the ACK of PUSCH transmission block and be not PUSCH resource problem that this HARQ course allocation of UE is new.。
Below, embodiments of the invention three are described.
Embodiments provide a kind of uplink hybrid automatic repeat request feedback method, solve eNB and UE cannot be indicated to be no longer the problem that HARQ process redistributes new PUSCH resource again, embodiment is as follows:
One, eNB side:
As shown in Figure 6, the ACK for PUSCH transmission block feeds back, and eNB does not dispatch the new biography PUSCH data block of this HARQ process.ENB by the bit value in the NDI territory on the DCI of ePDCCH carrying and last time DCI the value in NDI territory overturn, and invalid nonuniformity control information is filled in other territories on the DCI of ePDCCH carrying except NDI, indicate a PUSCH transmission block correctly to receive, and eNB does not dispatch the new biography PUSCH data block of this HARQ process.Nonuniformity control information includes but not limited to under type:
1) fill invalid Bit String in Resource block assignment and hopping resource allocation territory field, namely the value of this Bit String can not be understood according to agreement, cannot indicate Resources allocation position;
2) the CSI report territory instruction UE of DCI reports CSI information, but the PRB number of UE and TBS(Transmission Block Size corresponding to MCS grade are distributed in Resource block assignment and hopping resource allocation territory in DCI and Modulation and coding scheme and redundancy version territory) bit number be less than the minimum number bits that UE reports CSI needs.
ENB comprises the ePDCCH of above-mentioned nonuniformity control information by sending, passing on to U does not need the implication continuing as HARQ course allocation resource, and this implication can be arranged in advance by eNB side and UE side.
Two, UE side:
As shown in Figure 7, UE receives ePDCCH, when after correct detection ePDCCH channel, understands DCI.
If the bit value of NDI and last time DCI the value in NDI territory overturn, and there is invalid nonuniformity control information in other territories on ePDCCH except NDI, so UE is read as eNB and correctly receives a PUSCH transmission block, and do not dispatch the new biography PUSCH data block of this HARQ process, therefore UE informs that MAC layer transmission block is correctly received, and does not need on the sub-frame of uplink of this ePDCCH correspondence scheduling, send PUSCH biography data block.
Nonuniformity control information includes but not limited to under type:
1) in Resource block assignment and hopping resource allocation(resource block assignments and the instruction of frequency-hopping resource position) territory field is invalid Bit String, namely the value of this Bit String can not be understood according to agreement, cannot indicate Resources allocation position;
2) the CSI report territory instruction UE of DCI reports CSI information, but Resource block assignment and hopping resource allocation(resource block assignments in DCI and the instruction of frequency-hopping resource position) territory and Modulation and coding scheme and redundancy version(adjust encoding scheme and redundancy versions) territory distributes to the PRB number of UE and TBS(Transmission Block Size corresponding to MCS grade) and bit number be less than the minimum number bits that UE reports CSI needs.
The technical scheme that the embodiment of the present invention provides can solve eNB and ePDCCH cannot be utilized to indicate separately the ACK of PUSCH transmission block and be not PUSCH resource problem that this HARQ course allocation of UE is new.
Below in conjunction with accompanying drawing, embodiments of the invention four are described.
Embodiments provide a kind of uplink hybrid automatic repeat request feedback device, its structure as shown in Figure 8, comprising:
Data reception module 801, for receiving the PUSCH transmission data block that UE sends, and carries out CRC check;
DCI information is filled and ePDCCH sending module 802, for after completing CRC check, send ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, indicate described UE to be no longer the PUSCH resource that HARQ course allocation is new.
Preferably, the structure of described DCI information filling and ePDCCH sending module 802 as shown in Figure 9, comprising:
First dispensing unit 8021, particular bit string is filled for the Resource block assignment and hopping resource allocation territory field at described ePDCCH, the value of described particular bit string exceeds the position range of normal resource distribution, and described special string number of bits is the number of bits of described Resource block assignment and hopping resource allocation territory field;
First transmitting element 8022, send described ePDCCH for the upper corresponding descending sub frame once retransmitting subframe in execution cost PUSCH transmission data block to described UE, indicate described UE correctly to receive described PUSCH data block and discharge the current HARQ process resource taken of described UE.
Preferably, described DCI information filling and ePDCCH sending module 802 also comprise:
Second dispensing unit 8023, fill invalid Bit String for the Resource block assignment and hopping resource allocation territory field at ePDCCH, and the bit value in NDI territory on the DCI carried by described ePDCCH is set to the value in NDI territory when to send ePDCCH with the last time overturn;
Second transmitting element 8024, send described ePDCCH for the upper corresponding descending sub frame once retransmitting subframe in execution cost PUSCH transmission data block to described UE, indicate described UE correctly to receive described PUSCH data block and discharge the current HARQ process resource taken of described UE.
Preferably, described DCI information filling and ePDCCH sending module 802 also comprise:
3rd dispensing unit 8025, CSI report territory for the DCI carried at ePDCCH indicates described UE to report CSI, and the bit number that Resource block assignment and hopping resource allocation territory in described DCI and Modulation and coding scheme and redundancy version distribute to the PRB number of described UE and TBS corresponding to MCS grade is less than the minimum number bits that described UE reports CSI needs, and the bit value in NDI territory on the DCI carried by described ePDCCH is set to the value in NDI territory when to send ePDCCH with the last time overturn,
3rd transmitting element 8026, send described ePDCCH for the upper corresponding descending sub frame once retransmitting subframe in execution cost PUSCH transmission data block to described UE, indicate described UE correctly to receive described PUSCH data block and discharge the current HARQ process resource taken of described UE.
Uplink hybrid automatic repeat request feedback device accessible site shown in Fig. 8 and Fig. 9, in eNB, completes corresponding function by eNB.
The embodiment of the present invention additionally provides a kind of uplink hybrid automatic repeat request feedback device, and its structure as shown in Figure 10, comprising:
Data transmission blocks 1001, for sending PUSCH transmission data block to eNB;
EPDCCH receiver module 1002, for receiving the ePDCCH that described eNB sends at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, indicates described UE to be no longer the PUSCH resource that HARQ course allocation is new.
Preferably, this device also comprises:
DCI separates read through model 1003, for exceeding the particular bit string of the position range that normal resource is distributed in the Resource block assignment and hopping resource allocation territory field existence value of described ePDCCH, and special string number of bits is when being the number of bits of Resource block assignment and hopping resource allocation territory field, judge that described eNB correctly receives described PUSCH data block, and discharge the current HARQ process resource taken of described UE.
Preferably, described DCI separates read through model, also be filled with invalid Bit String for the Resource block assignment and hopping resource allocation territory field at described ePDCCH, and the bit value in NDI territory on the DCI of described ePDCCH carrying is when being set to the value in NDI territory when to send ePDCCH with the last time overturn, judge that described eNB correctly receives described PUSCH data block, and discharge the current HARQ process resource taken of described UE.
Preferably, described DCI separates read through model, CSI report territory also for the DCI carried at described ePDCCH indicates described UE to report CSI, and the bit number that Resource block assignment and hopping resource allocation territory in described DCI and Modulation and coding scheme and redundancy version distribute to the PRB number of described UE and TBS corresponding to MCS grade is less than the minimum number bits that described UE reports CSI needs, and the bit value in NDI territory on the DCI carried by described ePDCCH is when being set to the value in NDI territory when to send ePDCCH with the last time overturn, described UE judges that described eNB correctly receives described PUSCH data block, and discharge the current HARQ process resource taken of described UE.
Uplink hybrid automatic repeat request feedback device accessible site shown in Figure 10, in UE, completes corresponding function by UE.
The embodiment of the present invention additionally provides a kind of uplink hybrid automatic repeat request reponse system, comprise there is the feedback device of uplink hybrid automatic repeat request shown in Fig. 8 and Fig. 9 eNB and Figure 10 shown in the UE of uplink hybrid automatic repeat request feedback device;
Described eNB, for receiving the PUSCH transmission data block that described UE sends, and carry out CRC check, after completing CRC check, send ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, indicate described UE to be no longer the PUSCH resource that HARQ course allocation is new;
Described UE, for sending PUSCH transmission data block to described eNB, and receive the upper ePDCCH that once retransmit the corresponding descending sub frame transmission of subframe of described eNB in execution cost PUSCH transmission data block, indicate described UE to be no longer the PUSCH resource that HARQ course allocation is new.
Above-mentioned uplink hybrid automatic repeat request feedback device and system, can combine with a kind of uplink hybrid automatic repeat request feedback method that embodiments of the invention provide, eNB receives the PUSCH transmission data block that UE sends, and carry out CRC check, after completing CRC check, described eNB sends ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, notify that UE does not redistribute new PUSCH resource again for HARQ process by ePDCCH, achieve the HARQ mechanism based on ePDCCH, solving eNB cannot indicate UE not to be the problem that HARQ process redistributes new PUSCH resource again.
One of ordinary skill in the art will appreciate that all or part of step of above-described embodiment can use computer program flow process to realize, described computer program can be stored in a computer-readable recording medium, described computer program (as system, unit, device etc.) on corresponding hardware platform performs, when performing, step comprising embodiment of the method one or a combination set of.
Alternatively, all or part of step of above-described embodiment also can use integrated circuit to realize, and these steps can be made into integrated circuit modules one by one respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
Each device/functional module/functional unit in above-described embodiment can adopt general calculation element to realize, and they can concentrate on single calculation element, also can be distributed on network that multiple calculation element forms.
Each device/functional module/functional unit in above-described embodiment using the form of software function module realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.The above-mentioned computer read/write memory medium mentioned can be read-only memory, disk or CD etc.
Anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range described in claim.
Claims (17)
1. a uplink hybrid automatic repeat request feedback method, is characterized in that, comprising:
Base station (eNB) receives the PUSCH transmission data block that user terminal (UE) sends, and carries out Cyclic Redundancy Check verification;
After completing CRC check, described eNB sends at the corresponding descending sub frame retransmitting subframe of execution cost Physical Downlink Shared Channel (PUSCH) transmission data block next time the Physical Downlink Control Channel (ePDCCH) strengthened, and indicates described UE to be no longer the PUSCH resource that hybrid automatic repeat-request (HARQ) course allocation is new.
2. uplink hybrid automatic repeat request feedback method according to claim 1, is characterized in that, described eNB sends ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block and comprises:
Described eNB fills particular bit string in the resource block assignments of described ePDCCH and frequency-hopping resource position instruction (Resource block assignment and hopping resource allocation) territory field, the value of described particular bit string exceeds the position range of normal resource distribution, and described special string number of bits is the number of bits of described Resource block assignment and hopping resource allocation territory field;
Described eNB sends described ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block to described UE, indicates eNB described in described UE correctly to receive described PUSCH data block and discharges the current HARQ process resource taken of described UE.
3. uplink hybrid automatic repeat request feedback method according to claim 1, is characterized in that, described eNB sends ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block and comprises:
Described eNB fills invalid Bit String in the Resource block assignment and hopping resource allocation territory field of ePDCCH, and the bit value in NDI territory on the DCI carried by described ePDCCH is set to the value in NDI territory when to send ePDCCH with the last time overturn;
Described eNB sends described ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block to described UE, indicates eNB described in described UE correctly to receive described PUSCH data block and discharges the current HARQ process resource taken of described UE.
4. uplink hybrid automatic repeat request feedback method according to claim 1, is characterized in that, described eNB sends ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block and comprises:
Channel status information reports (CSI report) territory of the Downlink Control Information (DCI) that described eNB carries at ePDCCH indicates described UE to report CSI, and the bit number that Resource block assignment and hopping resource allocation territory in described DCI and adjustment encoding scheme and redundancy versions (Modulation and coding scheme and redundancy version) distribute to the PRB number of described UE and transmission block size (TBS) corresponding to MCS grade is less than the minimum number bits that described UE reports CSI needs, and the bit value in NDI territory on the DCI carried by described ePDCCH is set to the value in NDI territory when to send ePDCCH with the last time overturn,
Described eNB sends described ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block to described UE, indicates eNB described in described UE correctly to receive described PUSCH data block and discharges the current HARQ process resource taken of described UE.
5. a uplink hybrid automatic repeat request feedback method, is characterized in that, comprising:
UE sends PUSCH transmission data block to eNB;
Described UE receives the ePDCCH that described eNB sends at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, indicates described UE to be no longer the PUSCH resource that HARQ course allocation is new.
6. uplink hybrid automatic repeat request feedback method according to claim 5, it is characterized in that, described UE also comprises after receiving the step of the ePDCCH that described eNB sends at the corresponding descending sub frame that execution cost PUSCH transmission data block upper once retransmits subframe:
The particular bit string of the position range that normal resource is distributed is exceeded in the Resource block assignment and hopping resource allocation territory field existence value of described ePDCCH, and special string number of bits is when being the number of bits of Resource block assignment and hopping resource allocation territory field, described UE judges that described eNB correctly receives described PUSCH data block, and discharges the current HARQ process resource taken of described UE.
7. uplink hybrid automatic repeat request feedback method according to claim 5, it is characterized in that, described UE also comprises after receiving the step of the ePDCCH that described eNB sends at the corresponding descending sub frame that execution cost PUSCH transmission data block upper once retransmits subframe:
Invalid Bit String is filled with in the Resource block assignment and hopping resource allocation territory field of described ePDCCH, and the bit value in NDI territory on the DCI of described ePDCCH carrying is when being set to the value in NDI territory when to send ePDCCH with the last time overturn, described UE judges that described eNB correctly receives described PUSCH data block, and discharges the current HARQ process resource taken of described UE.
8. uplink hybrid automatic repeat request feedback method according to claim 5, it is characterized in that, described UE also comprises after receiving the step of the ePDCCH that described eNB sends at the corresponding descending sub frame that execution cost PUSCH transmission data block upper once retransmits subframe:
The CSI report territory of the DCI carried at described ePDCCH indicates described UE to report CSI, and the bit number that Resource block assignment and hopping resource allocation territory in described DCI and adjustment encoding scheme and redundancy versions (Modulation and coding scheme and redundancy version) distribute to the PRB number of described UE and transmission block size (TBS) corresponding to MCS grade is less than the minimum number bits that described UE reports CSI needs, and the bit value in NDI territory on the DCI carried by described ePDCCH is when being set to the value in NDI territory when to send ePDCCH with the last time overturn, described UE judges that described eNB correctly receives described PUSCH data block, and discharge the current HARQ process resource taken of described UE.
9. a uplink hybrid automatic repeat request feedback device, is characterized in that, comprising:
Data reception module, for receiving the PUSCH transmission data block that UE sends, and carries out CRC check;
DCI information is filled and ePDCCH sending module, for after completing CRC check, sends ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, indicates described UE to be no longer the PUSCH resource that HARQ course allocation is new.
10. hybrid automatic repeat-request feedback device according to claim 9, is characterized in that, described DCI information is filled and ePDCCH sending module comprises:
First dispensing unit, particular bit string is filled for the Resource block assignment and hopping resource allocation territory field at described ePDCCH, the value of described particular bit string exceeds the position range of normal resource distribution, and described special string number of bits is the number of bits of described Resource block assignment and hopping resource allocation territory field;
First transmitting element, send described ePDCCH for the upper corresponding descending sub frame once retransmitting subframe in execution cost PUSCH transmission data block to described UE, indicate described UE correctly to receive described PUSCH data block and discharge the current HARQ process resource taken of described UE.
11. uplink hybrid automatic repeat request feedback devices according to claim 10, is characterized in that, described DCI information is filled and ePDCCH sending module also comprises:
Second dispensing unit, fill invalid Bit String for the Resource block assignment and hopping resource allocation territory field at ePDCCH, and the bit value in NDI territory on the DCI carried by described ePDCCH is set to the value in NDI territory when to send ePDCCH with the last time overturn;
Second transmitting element, send described ePDCCH for the upper corresponding descending sub frame once retransmitting subframe in execution cost PUSCH transmission data block to described UE, indicate described UE correctly to receive described PUSCH data block and discharge the current HARQ process resource taken of described UE.
12. uplink hybrid automatic repeat request feedback methods according to claim 10 or 11, is characterized in that, described DCI information is filled and ePDCCH sending module also comprises:
3rd dispensing unit, CSI report territory for the DCI carried at ePDCCH indicates described UE to report CSI, and the bit number that Resource block assignment and hopping resource allocation territory in described DCI and Modulation and coding scheme and redundancy version distribute to the PRB number of described UE and TBS corresponding to MCS grade is less than the minimum number bits that described UE reports CSI needs, and the bit value in NDI territory on the DCI carried by described ePDCCH is set to the value in NDI territory when to send ePDCCH with the last time overturn,
3rd transmitting element, send described ePDCCH for the upper corresponding descending sub frame once retransmitting subframe in execution cost PUSCH transmission data block to described UE, indicate described UE correctly to receive described PUSCH data block and discharge the current HARQ process resource taken of described UE.
13. 1 kinds of uplink hybrid automatic repeat request feedback devices, is characterized in that, comprising:
Data transmission blocks, for sending PUSCH transmission data block to eNB;
EPDCCH receiver module, for receiving the ePDCCH that described eNB sends at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, indicates described UE to be no longer the PUSCH resource that HARQ course allocation is new.
14. uplink hybrid automatic repeat request feedback devices according to claim 13, it is characterized in that, this device also comprises:
DCI separates read through model, for exceeding the particular bit string of the position range that normal resource is distributed in the Resource block assignment and hopping resource allocation territory field existence value of described ePDCCH, and special string number of bits is when being the number of bits of Resource block assignment and hopping resource allocation territory field, judge that described eNB correctly receives described PUSCH data block, and discharge the current HARQ process resource taken of described UE.
15. uplink hybrid automatic repeat request feedback devices according to claim 14, is characterized in that,
Described DCI separates read through model, also be filled with invalid Bit String for the Resource block assignment and hopping resource allocation territory field at described ePDCCH, and the bit value in NDI territory on the DCI of described ePDCCH carrying is when being set to the value in NDI territory when to send ePDCCH with the last time overturn, judge that described eNB correctly receives described PUSCH data block, and discharge the current HARQ process resource taken of described UE.
16. uplink hybrid automatic repeat request feedback devices according to claim 14, is characterized in that,
Described DCI separates read through model, CSI report territory also for the DCI carried at described ePDCCH indicates described UE to report CSI, and the bit number that Resource block assignment and hopping resource allocation territory in described DCI and Modulation and coding scheme and redundancy version distribute to the PRB number of described UE and TBS corresponding to MCS grade is less than the minimum number bits that described UE reports CSI needs, and the bit value in NDI territory on the DCI carried by described ePDCCH is when being set to the value in NDI territory when to send ePDCCH with the last time overturn, described UE judges that described eNB correctly receives described PUSCH data block, and discharge the current HARQ process resource taken of described UE.
17. 1 kinds of uplink hybrid automatic repeat request reponse systems, is characterized in that, comprise eNB and UE;
Described eNB, for receiving the PUSCH transmission data block that described UE sends, and carry out CRC check, after completing CRC check, send ePDCCH at the upper corresponding descending sub frame once retransmitting subframe of execution cost PUSCH transmission data block, indicate described UE to be no longer the PUSCH resource that HARQ course allocation is new;
Described UE, for sending PUSCH transmission data block to described eNB, and receive the upper ePDCCH that once retransmit the corresponding descending sub frame transmission of subframe of described eNB in execution cost PUSCH transmission data block, indicate described UE to be no longer the PUSCH resource that HARQ course allocation is new.
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