CN108574564A - Mixed automatic retransmission request method and device - Google Patents
Mixed automatic retransmission request method and device Download PDFInfo
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Abstract
A kind of mixed automatic retransmission request method and device, the method sends identical data by least two HARQ processes, increase the probability of feeding back ACK information, and feeding back ACK information in whichever HARQ process, it is equivalent to other HARQ processes and has also fed back ACK information, to terminate in advance other HARQ processes.On the whole, the probability of feeding back ACK information increases, and is fed back based on the ACK of one of HARQ processes, and other processes can terminate in advance, therefore the time delay of HARQ is minimized.The propagation delay time of HARQ can also be effectively reduced using the communication device of this method, terminal, base station or system.
Description
Technical field
The present invention relates to fields of communication technology, more particularly to a kind of hybrid automatic repeat-request (Hybrid
Automatic Repeat-reQuest, HARQ) method and apparatus.
Background technology
HARQ is that one kind combining forward error correction (Forward Error Correction, FEC) and automatic repeat request
The error-control technique of (Automatic Repeat-reQuest, ARQ) technology.The parts FEC are used for correcting in channel often to go out
Existing mistake improves the efficiency of system to reduce number of retransmissions；The parts ARQ are used for correcting those seldom occur, FEC cannot
The mistake of correction, to improve the reliability of system.
HARQ technologies use the ARQ mechanism of stopping-waiting (Stop-And-Wait, SAW), under this mechanism, originator
The confirmation message of a upper packet must be waited for before sending next packet.In waiting time, channel idle is led
Cause the waste of system resource.For this purpose, there are N channel stop-wait HARQ technologies, by the way that parallel stop-wait protocol is arranged
Number of channel N improve the utilization rate of system resource, for example, a continuous transport stream is divided into N number of subchannel in time, i.e.,
N number of HARQ processes (HARQ process), and each process independently executes stop-wait retransmission protocol, wherein N is just whole
Number.
HARQ technologies are unavoidable to increase propagation delay time as a result of SAW mechanism, for this purpose, how to effectively reduce
Propagation delay time is always the major issue of HARQ technologies.
Invention content
An embodiment of the present invention provides HARQ method and apparatus, to reduce the propagation delay time of HARQ.
On the one hand, the embodiment of the present invention provides a kind of hybrid automatic repeat-request HARQ methods, including：Transmitting terminal passes through extremely
Few two HARQ processes send identical data；The transmitting terminal receives the feedback of the data, and receives positive acknowledgment ACK
When feedback, determine that the data are sent successfully.
On the other hand, the embodiment of the present invention provides a kind of communication device, including：Transmission unit, for passing through at least two
HARQ processes send identical data；Receiving unit, the feedback for receiving the data；Processing unit, when the reception is single
When member receives the positive acknowledgment ACK feedbacks of the data, for determining that the data are sent successfully.
As it can be seen that above method sends identical data by least two HARQ processes, feeding back ACK information is increased
Probability, and feeding back ACK information in whichever HARQ process are equivalent to other HARQ processes and have also fed back ACK information, to
Terminate in advance other HARQ processes.On the whole, the probability of feeding back ACK information increases, and based on one of HARQ processes
ACK is fed back, and other processes can terminate in advance, therefore the time delay of HARQ is minimized.Then apply the communication device, end of this method
End, base station or system can also effectively reduce the propagation delay time of HARQ.
Description of the drawings
The flow diagram for the HARQ methods that Fig. 1 is provided by the embodiment of the present invention；
Fig. 2 is a kind of principle schematic of existing N channels stop-wait HARQ technologies；
Fig. 3 is the principle schematic of another existing N channels stop-wait HARQ technologies；
A kind of signal flow diagram for HARQ methods that Fig. 4 is provided by the embodiment of the present invention；
A kind of HARQ buffer schedulings flow graph that Fig. 5 is provided by the embodiment of the present invention；
The signal flow diagram for another HARQ methods that Fig. 6 is provided by the embodiment of the present invention；
Another HARQ buffer schedulings flow graph that Fig. 7 is provided by the embodiment of the present invention；
Fig. 8 is a kind of tdd frame structural schematic diagram；
Fig. 9 is another tdd frame structural schematic diagram；
The flow diagram for another HARQ methods that Figure 10 is provided by the embodiment of the present invention；
A kind of structure diagram for communication device that Figure 11 is provided by the embodiment of the present invention；
The structure diagram for another communication device that Figure 12 is provided by the embodiment of the present invention；
The structure diagram for another communication device that Figure 13 is provided by the embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that the described embodiments are merely a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to FIG. 1, a kind of flow diagram of its HARQ method provided by one embodiment of the invention.This method
Executive agent is transmitting terminal, and certain transmitting terminal can be located at network side, can also be located at end side.As shown in Figure 1, this method
Including：
S110：Identical data are sent by least two HARQ processes；
S120：When receiving the feedback of the data, and receiving positive acknowledgment ACK feedback, determine the data send at
Work(.
The above identical data refer to transmission data block (Transport Block, TB), and are transmitted in each HARQ processes
TB entrained by data it is identical, but the redundancies such as redundancy versions (Redundancy Version, RV) can be different, also may be used
With identical, the present embodiment does not do any restrictions.
Above method sends identical data by least two HARQ processes, to increase the probability of feeding back ACK information,
And feeding back ACK information in whichever HARQ process, it is equivalent to other HARQ processes and has also fed back ACK information, in advance
Terminate other HARQ processes.On the whole, the probability of feeding back ACK information increases, and the ACK based on one of HARQ processes is anti-
Feedback, other processes can terminate in advance, therefore the time delay of HARQ is minimized.
Above method can be adapted for the communication system high to communication delay requirement, method according to the invention it is possible to full
High request of the foot for communication delay.For example, logical based on cellular radio in Internet of Things (Internet of Things, IOT)
In the intelligent grid electrical power trans mission/distribution system of letter because the Distribution Network Equipment in intelligent grid have for the time delay of communication it is very high
It is required that requiring under the success rate for 99.5% to be to be under 99.7% success rate within 100ms for unidirectional end-to-end time delay
Within 200ms, within 400ms under 99.8% success rate.The method provided according to embodiments of the present invention can effectively meet
For the demand of the higher system of delay requirement in Internet of Things field.
Table 1 and table 2 are please referred to, above method is further embodied and existing skill is better than to the reducing effect of HARQ time delays
Art.To make Tables 1 and 2 be easy to understand, two kinds of existing N channels stop-wait HARQ technologies, respectively radio chains are described below
Road control segmentation (Radio Link Control segmentation, RLC segmentation) is between technology and transmission time
Every binding (Transmission Time Interval bundling, TTI bundling) technology, respectively such as Fig. 2 and Fig. 3 institutes
Show.
As shown in Fig. 2, the first：RLC segmentation technologies.
In order to reduce the number of retransmissions of each HARQ processes, according to the channel quality information of feedback, according to bit error rate requirement
Data packet is splitted into multiple small data packets and is passed in multiple HARQ processes respectively by the bit number that computed HARQ process can be transmitted
It is defeated, it is merged again after receiving end is all properly received and is reassembled as raw data packets.
Herein can run 8 HARQ processes parallel, and by a Service Data Unit (Service Data Unit,
SDU it) 110 splits into for 4 Packet Data Units (Packet Data Unit, PDU) 120 and illustrates.First row in Fig. 1
Number represents Transmission Time Interval serial number (TTI#), and second row number represents HARQ into program number (HARQ#).
First, a RLC Service Data Unit (Service Data Unit, SDU) 110 multiple RLC are split into be grouped
Data cell (Packet Data Unit, PDU) 120, is then mapped to physical layer by RLC PDU120 by transmission channel, with
The form of TB130 is transmitted in multiple HARQ processes respectively.In view of the influence of processing delay and propagation delay time, TB is sent
Afterwards, the feedback acknowledgment information usually after four TTI starts to send next TB if feeding back ACK information in the 8th TTI；Such as
Fruit feeds back negative confirmation (NACK) information, then proceeds by re-transmission in the 8th TTI.The HARQ processes of serial number " 0 " exist in Fig. 1
The TTI of serial number " 0 " sends TB1, feeds back NACK in the TTI of serial number " 4 ", and TB1, other TB are retransmitted in the TTI of serial number " 8 "
Transmission it is similar, details are not described herein.
As shown in figure 3, second：TTI bundling technologies.
Identical TB is distributed to same HARQ processes in continuous TTI to send, only the TB ability to finally sending
It is fed back, Block Error Rate (Block Error Ratio, BLER) is just passed to reduce, to reduce number of retransmissions.
It is equally illustrated for it can run 8 HARQ processes parallel herein.Itself and first way difference
It is：It no longer needs to split SDU, each SDU210 corresponds to a PDU220, and a corresponding TB230；Each TB is corresponded to
Multiple Physical Resource Block (Physical Resource Block, PRB) (for example, 4), and these PRB are distributed to same
HARQ processes (the HARQ processes of serial number " 0 " in figure), respectively at multiple continuous T TI (TTI of serial number " 0 " to " 3 " in figure)
It is sent, and only the last one PRB is fed back.From figure 3, it can be seen that this mechanism, however it remains not used
HARQ processes (the HARQ processes of serial number " 0 " to " 3 " in such as Fig. 2).
Table 1 list Fig. 2 and the method for two methods shown in Fig. 3 and embodiment illustrated in fig. 1 under FDD system when
Prolong and compares with expense；Table 2 lists Fig. 2 and the method for two methods shown in Fig. 3 and embodiment illustrated in fig. 1 in TDD system
Time delay and expense in the case of 1 (config 1) of uplink configuration compare.In Tables 1 and 2, the row corresponding to one process is shown
Time delay and expense under RLC segmentation technologies；Row corresponding to TTI bundling shows TTI bundling skills
Time delay under art and expense；Row corresponding to adjacent two process and adjacent three process shows that method shown in FIG. 1 is utilized respectively
Two HARQ processes and three HARQ processes send time delay and expense under identical data.Wherein, first digit, which represents, passes
Defeated time delay, second digit represent the accumulative total (including the identical or different HARQ processes of serial number is accumulative) for occupying HARQ processes,
It is ACK which time feedback is number in bracket, which represent,.For example, in the first cell of row corresponding to one process in table 1
It is ACK that number " 1 " in bracket, which represents and just passes feedback, and digital " 5 " represent just that biography time delay is 5 TTI, the number outside bracket
" 1 ", which represents just to pass, occupies 1 HARQ process；Number " 2 " representative in bracket in second cell is fed back to for the second time
ACK, number 13 represent propagation delay time when being fed back to ACK for the second time as 13 TTI, and the number 2 outside bracket, which represents, occupies 2
HARQ processes.
Table 1
Table 2
In conjunction with Fig. 2 and table 1, under FDD system, for each TB, just passes and call 1 HARQ process, if just passed anti-
Feedback is ACK, then the transmission of each TB will take 5 TTI.By taking TB1 as an example, in the TTI of serial number " 0 " just pass,
The TTI of serial number " 4 " carries out just passing feedback, and propagation delay time is 5 TTI.If being fed back to NACK, and often increase the anti-of NACK
Feedback, propagation delay time will increase by 8 TTI.
In conjunction with Fig. 3 and table 1, under FDD system, for each TB, due to called in continuous 4 TTI same HARQ into
There is not used HARQ processes (such as HARQ processes of serial number " 1 " to " 3 ") thus, although therefore having used one in journey
HARQ processes, but be effectively equivalent to occupy 4 HARQ processes.If just passing and being fed back to ACK, propagation delay time is 8 TTI
(for example, in the TTI of serial number " 0 " just pass, being fed back in the TTI of serial number " 7 ").If being fed back to NACK, and often increase
Add the feedback of a NACK, propagation delay time that will increase by 16 TTI.
And embodiment illustrated in fig. 1, identical TB either is sent using adjacent two process or adjacent three process, for every
One TB is just passed and is called 1 HARQ process, if it is ACK just to pass feedback, the transmission of each TB will take 5 TTI.
But since two process increases by the transmission of redundancy the probability of feeding back ACK, if therefore transmission is fed back to NACK, and often increase by two
The feedback of secondary NACK, propagation delay time just increase by 8 TTI.Similarly, since three processes increase feedback by the transmission of redundancy twice
The probability of ACK, if therefore transmission is fed back to NACK, and often increase the feedback of NACK three times, propagation delay time just increases by 8 TTI.
As seen from the above analysis, the method for embodiment illustrated in fig. 1 often increases twice in the case of two process
The feedback of NACK, propagation delay time just increase by 8 TTI (wherein N is positive integer)；In the case of three processes, often increase three times
The feedback of NACK, propagation delay time just increase by 8 TTI.And method shown in Fig. 2 often increases the feedback of a NACK, propagation delay time
It is increased by 8 TT1.Method shown in Fig. 3 often increases the feedback of a NACK, and propagation delay time is increased by 16 TT1.As it can be seen that phase
For Fig. 2 and method shown in Fig. 3, the method that the embodiment of the present invention is provided makes propagation delay time obtain significant reduction, especially
It is when the number for receiving NACK feedbacks is more, and the advantages of method that the embodiment of the present invention is provided is notable.
About the analysis of transfer delay, the analysis under TDD system is similar with the analysis under FDD system, and details are not described herein.
It should be noted that the quantity for the HARQ processes that can be run parallel is less than or equal to the TTI quantity in RRT, because
This above quantity for sending the HARQ processes of identical data is less than or equal to the TTI quantity in RTT, and leads in RTT
It crosses at least two HARQ processes and sends identical data.
In the step S110 of above method, at least two HARQ processes can send identical in continuous TTI
Data, identical data can also be sent in discrete TTI.Both of these case is described as follows separately below：
The transmission data in discrete TTI：
In above step S110, the adjacent HARQ processes in at least two HARQ processes send identical data
Time interval is at least 4 TTI, i.e., 4th TTI of next HARQ processes after upper HARQ process transmission datas or
Transmission data after 4th TTI.
Referring to FIG. 4, due in FDD system uplink and downlink principle it is consistent, so sentencing terminal passes through the shared letter of physical uplink
Road (Physical Uplink Shared CHannel, PUSCH) is to for the transmission data of base station, for data on down channel
Transmission will not be described in great detail.From fig. 4, it can be seen that in this example, being assigned with two processes (process), respectively
Process1 and process2 sends identical data, and 4th TTIs of the process2 after process1 transmission datas
(i.e. base station feedback confirmation message when, that is, when half of RTT) transmission data, relative to process2 in process1 transmission datas
The case where transmission datas such as the 5th TTI, the 6th TTI later, propagation delay time smaller, but the present embodiment does not do this any limit
System.
Since the feedback that the first time data of process1 and process2 are sent is NACK, therefore process1 is carried out
Second data are sent, and second of data of process1 send be fed back to ACK, when terminal receives ACK feedbacks, i.e.,
Think that the data are sent successfully, therefore the feedback that second of data transmission is no longer carried out to process2 is handled it.And use this
When kind mode, if the number of transmissions is N (wherein N is positive integer, and includes just passing), then propagation delay time is ceil (N/2) RRT,
Middle ceil () indicates to round up.
In embodiments of the present invention, transmission intercal, which is at least the setting of 4 TTI, can be compatible with existing HARQ buffer schedulings machine
System.Referring to FIG. 5, it illustrates a kind of HARQ buffer schedulings flows.HARQ buffer scheduling mechanism is：The data of transmission for the first time
Decoded the first obtained soft bit information proves mistake through cyclic redundancy check (Cyclic Redundancy Check, CRC)
Later, NACK is fed back, notice is retransmitted；The second soft bit information is obtained after re-transmission data are decoded, needs first and the first soft ratio
Special information merging carries out CRC check again (as shown in step 2 and 3).This process correspond in HARQ sequential be 4 TTI it
Afterwards.
Method shown in Fig. 4 can ensure the requirement for merging time delay when not changing buffer scheduling sequence shown in fig. 5.Such as
Shown in Fig. 5, the data that process1 is sent obtain the first soft bit letter after antenna inverse mapping, resource inverse mapping, demodulation, decoding
Breath.The first soft bit information (step 1) is cached, so that the soft bit information of the data sent with follow-up process2 is closed
And.CRC check (step 2) is carried out to the first soft bit information, and according to check results feeding back ACK or NACK.In the prior art
In, after having fed back NACK, just carry out second of transmission of data.And the present embodiment, and it is not to wait for feedback result, but at 4
TTI or later, process2 carry out second to identical data and send.The data that process1 is sent are through antenna inverse mapping, money
The second soft bit information is obtained after source inverse mapping, demodulation, decoding.First soft bit information and the second soft bit information are closed
And (step 3), and CRC check (step 4) carried out to combined soft bit information, and according to check results feeding back ACK or NACK,
To judge whether to retransmit.
As it can be seen that in the case where not changing existing HARQ buffer schedulings sequence, in order to ensure the soft bit letter of process2
Breath can be merged correctly with the soft bit information of process1, be needed in the schools soft bit information CRC for completing process1
After testing, dispatches the soft bit information of process1 and merged with the soft bit information of process2, when corresponding to HARQ
In sequence after as 4 TTI.Therefore, 4 TTIs of the process2 after process1 transmission datas or later transmission data, often
The RTT of a process is still 8ms.
In view of in the present embodiment, not needing to wait for for sending the transmission of the data between the HARQ processes of identical data
Data send the feedback of result before, therefore, thus it is possible to vary the above HARQ buffer schedulings sequence allows subsequent HARQ processes to exist
Dispatch before the CRC of a upper HARQ processes soft bit information in caching and merge (as shown in fig. 7, relative to Fig. 5,
Step 2 and step 3 sequence are exchanged) so that adjacent HARQ processes quickly merge.
At this point, in the step S110 of above method, at least two HARQ processes can be respectively in continuous TTI
Send identical data.
Data instance is equally transmitted to base station by PUSCH with terminal.As shown in fig. 6, distribution two or more HARQ processes
Process1, process2, process3 ... send identical data.On HARQ processes process3 when being fed back to ACK,
It is considered as the data to send successfully, therefore the feedback of the data no longer to sending below is handled it.And when to receive the ACK anti-for terminal
When feedback, that is, terminate the transmission of the data.
Although both the above situation is illustrated by taking FDD system as an example, it is also applied for TDD system.Due to TDD systems
The frame structure of system is different from the frame structure of FDD system, does a simple declaration in the application of TDD system to above method below.
FDD frame structures include multiple subframes, and each subframe is used to downlink transfer or uplink；And tdd frame structure packet
The sub-frame of uplink U for uplink, the downlink subframe D for downlink transfer are included, and protection is provided between uplink and downlink
Special subframe S, wherein special subframe S include descending pilot frequency time slot (Downlink Pilot Time Slot, DwPTS), protection
It is spaced (Guard Period, GP), uplink pilot time slot (Uplink Pilot Time Slot, UpPTS), wherein GP is not transmitted
Any signal, provides protection between uplink and downlink, avoids cross jamming occur between uplink and downlink.According to sub-frame of uplink U and downlink
The ratio of subframe D, tdd frame structure include a variety of, and Fig. 8 and Fig. 9 just show 4 two kinds of tdd frame structures of configuration 1 and configuration.So
In a tdd system, in the step S310 of above method, in continuous sub-frame of uplink or downlink subframe, described at least two
HARQ processes can send identical data in continuous TTI.Certainly, do not having continuous sub-frame of uplink or downlink subframe
Under conditions of, identical data can also be sent in discrete TTI, and if having adjusted the tune of the HARQ cachings of receiving terminal
Degree sequence, the then time interval that identical data are sent in discrete TTI are unrestricted.
In addition, compared to fdd mode, the HARQ process periods and uplink-downlink configuration and the positions TTI under TDD are all related,
When for adjacent HARQ processes, feedback latencies are more than the time for generating ACK/NACK caused by uplink and downlink switches, to transmitting phase
With the feedbacks of adjacent HARQ processes of data carry out the bundling of ' or ' logic, will contribute to alleviate feedback resources nervous
The technical issues of.
The embodiment of the present invention also provides a kind of HARQ methods, and executive agent is receiving terminal, and the receiving terminal can be located at
End side can also be located at base station side.As shown in Figure 10, this method includes：
S101：The feedback information of adjacent HARQ processes to transmitting identical data carry out logic or operation；
S102：The result after the logic or operation is sent using same channel resource.
The above behavior example, please refers to table 3, and the number 0~6 of left side first row respectively represents the configuration of tdd frame structure in table 3
Type, above the number 0~9 of the second row respectively represent sub-frame number, the corresponding PHICH position offsets table of subframe of serial number n
Show that the position in the uplink PUSCH data that current location is sent after how many a subframes receives ACK/NACK feedbacks.It is carried in table 3
The numerical value of bracket is the numerical value carried out according to this method corresponding to the bundling of "or" so that adjacent HARQ processes correspond to same
One PHICH resource.For example, for the subframe that TDD Configuration Types are " 4 " and serial number " 2 " and " 3 ", it is PHICH corresponding
It is respectively 6 (6) and 6 (5) to set offset.The deviant under digital representation traditional scheme outside its bracket, i.e. current sequence number are " 2 "
The subframe of " 3 ", feedback position are 6 frames --- downlink PHICH corresponding to serial number " 8 " and the subframe of " 9 " thereafter
It sets；The modified deviant of digital representation the present embodiment in bracket, i.e. current sequence number are the subframe of " 2 " and " 3 ", feedback bit
Set respectively 6 and 5 frames --- positions downlink PHICH corresponding to the subframe of serial number " 8 " thereafter.As it can be seen that in the present embodiment,
The operation of logical "or" may be implemented all in the subframe of serial number " 8 " in the PHICH feedback positions of frame " 2 " and frame " 3 ".
Table 3
Downlink is then simpler, please refers to table 4, and the number 0~6 of left side first row respectively represents tdd frame structure in table
Configuration Type, above the number 0~9 of the second row respectively represent sub-frame number, the corresponding PUCCH ACK/ of subframe of serial number n
NACK indicates that the ACK/NACK that current sub-frame of uplink is sent is the Physical Downlink Shared Channel (Physical to preceding how many a subframes
Downlink Shared CHannel, PDSCH) feedback.The cell with multiple numbers indicates these digital institutes in table 4
The feedback of the multiple downlink PDSCH represented can be by the bundling of "or" in the same Physical Uplink Control Channel
It is transmitted in (Physical Uplink Control CHannel, PUCCH) resource.For example, TDD Configuration Types are 1 and son
The ACK/NACK on PUCCH that frame number is 2 corresponds to the feedback of the PDSCH of serial number " 6 " and the subframe of " 7 " in a frame,
Because the same positions PUCCH are to drinking multiple positions PDSCH, thus the present embodiment can to the ACK/NACK of multiple PDSCH into
The operation of row logical "or".
Table 4
Further, by taking TDD configures 4 (config4) frame structures of 1 (config1) and configuration as an example, respectively such as Fig. 8 and Fig. 9 institutes
Show, either at uplink (UL), or at downlink (DL), for transmitting the adjacent HARQ processes of identical data
Feedback information can carry out logic or operation；And the result after the logic or operation is fed back using same channel resource.
In addition, the executive agent of above method is at end side, can be notified in such a way that process notifies terminal which
HARQ processes are for sending identical data.At this point, the end side (being transmitting terminal) also receives instruction message：The instruction
Message includes the combination of HARQ process numbers, and the HARQ process numbers combination includes at least two HARQ process numbers, is used to indicate described
The corresponding at least two HARQ processes of at least two HARQ process numbers send identical data；Or the instruction message includes referring to
Show position, is used to indicate at least two HARQ processes with identical indicating bit and sends identical data；Or the instruction message
Including at least two HARQ process number fields, it is used to indicate at least two HARQ corresponding at least two HARQ process numbers
Process sends identical data.For example, can be configured by wireless heterogeneous networks (Radio Resource Control, RRC)
Mode can also be notified by Physical Downlink Control Channel (Physical Downlink Control CHannel, PDCCH)
Or the directly modes such as scheduling notify which HARQ process of terminal for sending identical data, the embodiment of the present invention does not do any limit
System.
Notifying terminal which HARQ process in sending the method for identical data by RRC configuration modes, it can be with
Field is set in Medium Access Layer mainly configures (MAC-MainConfig) message, for notifying that it is identical that terminal needs to send
The HARQ process numbers of data combine, example：{ process 1, process 3 } indicates that process 1 and process 3 combine for short time-delay.Passing through PDCCH
Instruction is arranged for sending in the method for identical data in advice method which HARQ process of notice terminal in PDCCH message
Position, cooperation HARQ process numbers notice terminal are that the HARQ processes should be with the HARQ processes of identical indicating bit for sending identical number
According to, such as：The indicating bit is that the HARQ processes in table 5 merge indicating bit (HARQ process combination
indicator)。
Table 5
Method of which the HARQ process of terminal for sending identical data is being notified by the direct scheduling modes of PDCCH
In, PDCCH dispatches multiple HARQ processes, such as：Increase HARQ process numbers (HARQ process in PDCCH message
Number) field other than HARQ process number fields, increases HARQ process number in table 6
2 fields are used to indicate the two processes for sending identical data.
Table 6
One of ordinary skill in the art will appreciate that realizing that all or part of step in above method is can to pass through journey
Sequence is completed to instruct relevant hardware, and the program can be stored in a computer-readable medium, the readable medium,
Such as：ROM/RAM, magnetic disc, CD etc..
For example, a kind of computer program product provided in an embodiment of the present invention, including computer-readable medium, readable Jie
Matter includes batch processing code, for executing any HARQ methods described in above example.
The embodiment of the present invention also provides a kind of communication device, and as shown in figure 11, which includes memory 111 and processor
112, batch processing code is stored wherein in memory 111, processor 112 calls the program code in memory 111, execute with
Any HARQ methods described in upper embodiment of the method.Detailed process same Fig. 1, Fig. 2 or shown in Fig. 3 embodiment of the method,
This is repeated no more.
The embodiment of the present invention also provides another communication device, and as shown in figure 12, which includes transmission unit 121, connects
Receive unit 122 and processing unit 123.Wherein transmission unit 121 can be transmitter, and receiving unit 122 can be receiver,
Processing unit 123 can be processor；And transmission unit 121 is used to send identical data by least two HARQ processes；
Receiving unit 122 receives the feedback of the data by at least two HARQ processes；When the receiving unit receives institute
When stating the positive acknowledgment ACK feedbacks of data, processing unit 123 is for determining that the data are sent successfully.
In addition, with embodiment of the method shown in FIG. 1, receiving unit can be also used for receiving the instruction message.About finger
Show message type or content with embodiment of the method shown in Fig. 1, details are not described herein.
Other details of the device of the present embodiment are similar with embodiment of the method shown in Fig. 1 with technique effect, no longer superfluous herein
It states.
3 are please referred to Fig.1, the embodiment of the present invention also provides a kind of HARQ devices, is located at receiving terminal, can be used for executing Figure 10
Method shown in embodiment.As shown in Figure 10, which includes logical unit 131 and transmission unit 132, and wherein logic is transported
Calculate unit 131 be used for the adjacent HARQ processes to transmitting identical data feedback information carry out logic or operation；It sends single
Member 132 is for feeding back the result after the logic or operation using same channel resource.
It should be noted that each unit in the communication device of above example can be present in end as discrete assembly
In end or access network equipment, naturally it is also possible to be integrated into a logic entity and be set to terminal or access thin consolidation or whole
In net equipment.The present embodiment does not do any restrictions.
Any communication device shown in figure 11 above, 12 and 13, can be located at terminal can also be located at base station.Cause
This, the embodiment of the present invention also provides a kind of terminal, base station or communication system, including shown in figure 11 above, 12 and 13 it is any
Kind communication device.
In conclusion above example sends identical data by least two HARQ processes, as long as there are one and
Positive acknowledgment (ACK) information is fed back in HARQ processes, that is, thinks that the data are sent successfully.As it can be seen that this method send one by multiple
Determine redundancy, to increase the probability of feeding back ACK information, and feeding back ACK information in whichever HARQ process, is equivalent to other
HARQ processes have also fed back ACK information, to terminate in advance other HARQ processes.To, on the whole, feeding back ACK information
Probability increases, and is fed back based on the ACK of one of HARQ processes, and other processes can terminate in advance, therefore the time delay of HARQ
It is minimized.
Other embodiments：
Embodiment 1, a kind of hybrid automatic repeat-request HARQ methods, including：
Transmitting terminal sends identical data by least two HARQ processes；
Transmitting terminal receives the feedback of the data, and when receiving positive acknowledgment ACK feedback, determine the data send at
Work(.
Embodiment 2, according to method described in embodiment 1, the transmitting terminal is sent identical by least two HARQ processes
Data during, the adjacent HARQ processes in at least two HARQ processes send the time interval of the data at least
For 4 Transmission Time Interval TTI.
Embodiment 3, according to transmitting terminal described in method described in embodiment 1 by least two HARQ processes send it is identical
During data, at least two HARQ processes send the data in continuous TTI respectively.
Embodiment 4, according to 1 to 3 any one of them method of embodiment, the quantity of the HARQ processes is less than or equal to ring
The TTI quantity in time RTT is returned, and the transmitting terminal sends identical number in RTT by at least two HARQ processes
According to.
Embodiment 5, according to 1 to 4 any one of them method of embodiment, further include：
The transmitting terminal receives instruction message, and the instruction message includes the combination of HARQ process numbers, the HARQ process numbers
Combination includes at least two HARQ process numbers.
Embodiment 6, the method according to embodiment 5, the instruction message are that Medium Access Layer mainly configures MAC-
MainConfig message.
Embodiment 7, according to 1 to 4 any one of them method of embodiment, further include：
The transmitting terminal receives instruction message, and the instruction message includes indicating bit, is used to indicate with identical indicating bit
At least two HARQ processes send identical data.
Embodiment 8, the method according to embodiment 7, the instruction message disappear for physical downlink control channel PDCCH
Breath.
Embodiment 9, according to 1 to 4 any one of them method of embodiment, further include：
The transmitting terminal receives instruction message, and the instruction message includes at least two HARQ process number fields.
Embodiment 10, the method according to embodiment 9, the instruction message disappear for physical downlink control channel PDCCH
Breath.
Embodiment 11, a kind of hybrid automatic repeat-request HARQ methods, including：
Receiving terminal to the feedback information for transmitting the adjacent HARQ processes of identical data carry out logic or operation；
Receiving terminal sends the result after the logic or operation using same channel resource.
Embodiment 12, a kind of communication device, including：
Transmission unit, for sending identical data by least two HARQ processes；
Receiving unit, the feedback for receiving the data；
Processing unit, when the receiving unit receives the positive acknowledgment ACK feedbacks of the data, described in determining
Data are sent successfully.
Embodiment 13, the device according to embodiment 12, the transmission unit are sent by least two HARQ processes
During identical data, the adjacent HARQ processes in at least two HARQ processes send the time interval of the data
At least 4 Transmission Time Interval TTI.
Embodiment 14, the device according to embodiment 12, the transmission unit are sent by least two HARQ processes
During identical data, at least two HARQ processes send the data in continuous TTI respectively.
Embodiment 15, according to 12 to 14 any one of them device of embodiment, the quantity of the HARQ processes is less than or waits
In the TTI quantity in Loop Round Trip Time RTT, and the transmitting terminal is identical by least two HARQ processes transmission in RTT
Data.
Embodiment 16, according to 12 to 15 any one of them device of embodiment, further include：
The receiving unit is additionally operable to receive instruction message, and the instruction message includes the combination of HARQ process numbers, described
The combination of HARQ process numbers includes at least two HARQ process numbers.
Embodiment 17, the device according to embodiment 16, the instruction message are that Medium Access Layer mainly configures MAC-
MainConfig message.
Embodiment 18, according to 12 to 15 any one of them device of embodiment, further include：
The receiving unit is additionally operable to receive instruction message, and the instruction message includes indicating bit, is used to indicate with phase
At least two HARQ processes with indicating bit send identical data.
Embodiment 19, the device according to embodiment 18, the instruction message disappear for physical downlink control channel PDCCH
Breath.
Embodiment 20, according to 12 to 15 any one of them device of embodiment, further include：
The receiving unit is additionally operable to receive instruction message, and the instruction message includes at least two HARQ process numbers
Field.
Embodiment 21, the device according to embodiment 20, the instruction message disappear for physical downlink control channel PDCCH
Breath.
Embodiment 22, a kind of communication device, including：
Logical unit, the feedback information for the adjacent HARQ processes to transmitting identical data carry out logic or
Operation；
Transmission unit, for feeding back the result after the logic or operation using same channel resource.
Embodiment 23, a kind of communication device, including memory and processor, wherein the memory internal stored program generation
Code, the processor call the program code in the memory, execute such as 1 to 11 any one of them step of embodiment.
Embodiment 24, a kind of computer program product, including computer-readable medium, internal stored program code are described
Program code is for executing such as 1 to 11 any one of them step of embodiment.
Embodiment 25, a kind of terminal, including such as 12 to 23 any one of them communication device of embodiment.
Embodiment 26, a kind of base station, including such as 12 to 23 any one of them communication device of embodiment.
A kind of 27. communication system of embodiment, including such as 12 to 23 any one of them communication device of embodiment.
It the above is only the preferred embodiment of the present invention, it is noted that those skilled in the art are come
It says, without departing from the principle of the present invention, can also make several improvements and retouch, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (20)
1. a kind of hybrid automatic repeat-request HARQ methods, are executed by transmitting terminal, which is characterized in that including：
Identical data are sent by least two HARQ processes；
The feedback of the data is received, and is received in any one HARQ process in at least two HARQ processes described
When the positive acknowledgment ACK feedbacks of data, determine that the data are sent successfully.
2. according to the method described in claim 1, it is characterized in that, further including：
Terminate other HARQ other than the HARQ processes for receiving ACK feedback in at least two HARQ processes into
Journey.
3. method according to claim 1 or 2, which is characterized in that identical being sent by least two HARQ processes
During data, the time interval that the adjacent HARQ processes in at least two HARQ processes send the data is at least
4 Transmission Time Interval TTI.
4. method according to claim 1 or 2, which is characterized in that identical being sent by least two HARQ processes
During data, at least two HARQ processes send the data in continuous TTI respectively.
5. method according to any one of claims 1 to 4, which is characterized in that the quantity of the HARQ processes is less than or waits
In the TTI quantity in Loop Round Trip Time RTT, and identical data are sent by at least two HARQ processes in RTT.
6. method according to any one of claims 1 to 5, which is characterized in that further include：Receive instruction message, wherein
The instruction message includes the combination of HARQ process numbers, and the HARQ process numbers combination includes at least two HARQ processes
Number；Alternatively,
The instruction message includes indicating bit, is used to indicate at least two HARQ processes with identical indicating bit and sends phase
Same data；Alternatively,
The instruction message includes at least two HARQ process number fields.
7. a kind of communication device, which is characterized in that including：
Unit for sending identical data by least two HARQ processes；
Unit for the feedback for receiving the data；
The positive acknowledgment ACK of the data is received in any one HARQ process in at least two HARQ processes
When feedback, determine that the data send successful unit.
8. device according to claim 7, which is characterized in that further include：
For terminating other HARQ other than the HARQ processes for receiving the ACK feedbacks in at least two HARQ processes
The unit of process.
9. device according to claim 7 or 8, which is characterized in that identical being sent by least two HARQ processes
During data, the time interval that the adjacent HARQ processes in at least two HARQ processes send the data is at least
4 Transmission Time Interval TTI.
10. device according to claim 7 or 8, which is characterized in that identical being sent by least two HARQ processes
During data, at least two HARQ processes send the data in continuous TTI respectively.
11. according to claim 7 to 10 any one of them device, which is characterized in that the quantity of the HARQ processes be less than or
Equal to the TTI quantity in Loop Round Trip Time RTT, and identical data are sent by at least two HARQ processes in RTT.
12. according to claim 7 to 11 any one of them device, which is characterized in that further include for receiving instruction message
Unit, wherein
The instruction message includes the combination of HARQ process numbers, and the HARQ process numbers combination includes at least two HARQ processes
Number；Alternatively,
The instruction message includes indicating bit, is used to indicate at least two HARQ processes with identical indicating bit and sends phase
Same data；Alternatively,
The instruction message includes at least two HARQ process number fields.
13. a kind of communication device, which is characterized in that including memory and processor, the processor is for executing as right is wanted
Seek 1 to 6 any one of them method.
14. a kind of terminal, which is characterized in that including such as claim 7 to 13 any one of them communication device.
15. a kind of hybrid automatic repeat-request HARQ methods, are executed by receiving terminal, which is characterized in that including：
The feedback information of adjacent HARQ processes to transmitting identical data carry out logic or operation；
The result after the logic or operation is sent using same channel resource.
16. a kind of communication device, which is characterized in that including：
Feedback information for the adjacent HARQ processes to transmitting identical data carry out logic or operation unit；
Unit for sending the result after the logic or operation using same channel resource.
17. a kind of communication device, which is characterized in that including：Including memory and processor, the processor is for executing：
The feedback information of adjacent HARQ processes to transmitting identical data carry out logic or operation；
The result after the logic or operation is sent using same channel resource.
18. a kind of terminal, which is characterized in that include the communication device as described in claim 16 or 17.
19. a kind of computer readable storage medium, which is characterized in that including being used to execute as described in any one of claim 1 to 6
The program code of method.
20. a kind of computer readable storage medium, which is characterized in that include the journey for executing method as claimed in claim 15
Sequence code.
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| WO2021142626A1 (en) * | 2020-01-14 | 2021-07-22 | 华为技术有限公司 | Uplink feedback method and device |
| CN113923792A (en) * | 2019-01-08 | 2022-01-11 | 北京小米移动软件有限公司 | Downlink data transmitting method, receiving method, device and storage medium |
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| CN105765894B (en) * | 2013-11-28 | 2019-06-07 | 瑞典爱立信有限公司 | Method, apparatus and user equipment for hybrid automatic repeat request transmissions |
| US9923665B2 (en) | 2014-06-06 | 2018-03-20 | Huawei Technologies Co., Ltd. | System and method for forward error correction |
| CN106656440B (en) * | 2015-10-27 | 2019-07-30 | 上海朗帛通信技术有限公司 | A kind of method and apparatus in narrowband wireless communication |
| CN109792312A (en) * | 2017-03-03 | 2019-05-21 | Oppo广东移动通信有限公司 | A kind of method, terminal device and network equipment transmitting data |
| CN110875804B (en) | 2018-09-04 | 2021-04-09 | 成都华为技术有限公司 | Method and device for sending and receiving feedback information |
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| CN103378953A (en) | 2013-10-30 |
| CN103378953B (en) | 2018-04-17 |
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