CN101094046A - Transmission method and device for hybrid automatic request retransmision - Google Patents
Transmission method and device for hybrid automatic request retransmision Download PDFInfo
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Abstract
In this method, the sending end (SE) receives the affirming info (AI) of HARQ PDU of reaching the max HARQ retranslation number of times (MHRN). If the affirming result (AR) of AI is NACK, SE informs the receiving end (RE) of AR. If receiving the AR error indication from RE in the preset waiting time, SE will cancel the remains error report. This invention also discloses a HARQ translation device. When MHRN has reached, this invention prevents the successfully translated HARQ PDU from reporting as a remains error. Thus the ARQ retranslation is no longer needed. This saves the wireless resource and raises the translation efficiency.
Description
Technical field
The data link layer that the present invention relates to wireless communication system realizes, relates in particular to the transmission method of a kind of HARQ (Hybird Automatic-Repeat Request mixes automatic request retransmission) and uses the device of this method.
Background technology
In nearly 10 years of future, compared the competitive advantage that keeps certain in order to make cell mobile communication systems with other wireless access technology, in 3GPP (third generation partner program) tissue, begun the formulation work of LTE (Long Term Evolution, Long Term Evolution project) technical standard at present.In the discussion process of LTE framework and correlation technique, adopt the protocol architecture of double-deck ARQ (Automatic-Repeat Request, request retransmission automatically) to reach an agreement.
In the L2 (Layer 2, data link layer) of LTE system structure, double-deck ARQ comprises ARQ layer and HARQ layer.Wherein, HARQ retransmits and merging mainly by the detection to the mistake piece, obtains to merge gain, to improve physical resource utilization; ARQ is positioned on the HARQ, be responsible for to retransmit the HARQ layer since residual error cause do not have a successful data packets for transmission.The HARQ residual error generally includes HARQ PDU and reaches HARQ maximum retransmission transmission success not yet; And receiving end to detect packet wrong, feedback NACK (Negative Acknowledgement, negative acknowledgement) but made a start and be decoded as ACK (Acknowledgement confirms), the HARQ that causes making a start take for packet by correct transmission etc.
In the standard of 3GPP R6 (Release 6), which packet of state report judging that the ARQ that makes a start will feed back according to the ARQ of receiving end is not transmitted success, thereby retransmits in view of the above.Mutual between the ARQ can be introduced bigger time-delay usually; for the packet back off time that reduces to bring thus; prior art proposes to detect the HARQ transmission at the HARQ layer and reaches the residual error that maximum retransmission and NACK are misinterpreted as ACK; by the HARQ that makes a start the transmit status of packet is fed back to the ARQ that makes a start fast, thereby reach the purpose that reduces ARQ layer back off time.
When the HARQ layer reached maximum HARQ number of retransmissions mistake, its transfer process can be referring to Fig. 1, and the HARQ that makes a start receives the ARQ PDU of the ARQ that makes a start, is converted into HARQ PDU X; The HARQ that makes a start sends Control message to receiving end HARQ, is used to refer to receiving end HARQ and how receives the HARQ PDU of transmission thereafter; The HARQ PDU X mistake that receiving end HARQ receives, HARQ returns NACK to making a start; The HARQ that makes a start receives NACK, and HARQ PDU X is retransmitted; After the HARQ that makes a start receives receiving end HARQ certain NACK to HARQ PDU X, find that the number of transmissions of HARQPDU X has reached maximum HARQ number of retransmissions, then no longer retransmit HARQ PDU X, and report residual error to the ARQ that makes a start.
When receiving end sends affirmation information to HARQ PDU to making a start, might confirm result's misunderstanding.Receiving end sends ACK and is made a start when being misinterpreted as NACK, is referred to as to have taken place the ACK/NACK mistake; Receiving end sends NACK and is made a start when being misinterpreted as ACK, is referred to as to have taken place the NACK/ACK mistake.
Be not difficult to find out from transfer process shown in Figure 1, in the prior art, if receiving end is being made a start when reaching maximum HARQ number of retransmissions, correctly received current HARQ PDU, and the ACK of receiving end is made a start and is misinterpreted as NACK, the HARQ that then makes a start can report residual error immediately, triggers corresponding ARQ retransmission processes.Because this HARQ PDU is correctly received by receiving end, the retransmission processes of ARQ has caused the waste of resource and the reduction of efficiency of transmission.
Summary of the invention
The present invention will solve be the HARQ layer when reporting the residual error that reaches maximum HARQ number of retransmissions because of the problem that the wasting of resources that the ACK/NACK mistake causes and efficiency of transmission reduce takes place.
HARQ transmission method of the present invention may further comprise the steps:
Make a start and receive the affirmation information of receiving end the HARQ PDU that reaches maximum HARQ number of retransmissions;
When the affirmation result in the confirmation is negative acknowledgement NACK, make a start affirmation result notification receiving end;
If in scheduled wait is received receiving end in the time affirmation erroneous results indication, the cancellation residual error of making a start reports.
Preferably, described method also comprises: receiving end is being made a start when the HARQ PDU that reaches maximum HARQ number of retransmissions taken place that ACK is misinterpreted as NACK wrong, sends to making a start and confirms the erroneous results indication.
Preferably, described making a start realized affirmation result notification receiving end by control information Control message.
Preferably, when the HARQ PDU that reaches maximum HARQ number of retransmissions for isolated HARQ PDU and the affirmation result in the confirmation during for NACK, the described Control message that will confirm the result notification receiving end that makes a start is additional Control message.
Preferably, described method also comprises: do not receive the affirmation erroneous results indication of receiving end in the time at scheduled wait if make a start, then report residual error.
Preferably, the described scheduled wait time is not less than receiving end detection affirmation erroneous results and notifies and make a start the required time.
The invention provides a kind of HARQ transmitting device, comprise sending module and receiver module, and time block, affirmation feedback module and residual error reporting module as a result, wherein:
Time block starts the timing of scheduled wait time with cause residual error reporting module, and timing is to back notice residual error reporting module;
Confirm that feedback module is used for will confirming the result notification opposite end by sending module as a result;
The residual error reporting module is used for receiving the affirmation information of opposite end to the HARQ PDU that reaches maximum HARQ number of retransmissions by receiver module, when wherein affirmation result startup time block timing during for NACK; And in timing to before receiving that the opposite end confirms that the cancellation residual error reports under the situation of erroneous results indication.
Preferably, described residual error reporting module receives the timing of time block after notice, reports residual error.
Preferably, described affirmation as a result feedback module will confirm that the result notification opposite end realizes by sending Control message by sending module to the opposite end;
Described residual error reporting module in the opposite end to the affirmation result of the HARQ PDU that reaches maximum HARQ number of retransmissions for NACK and this HARQ PDU during for isolated HARQ PDU, confirmation command feedback module as a result sends additional Control message to the opposite end.
Preferably, described device also comprises the ACK/NACK indicating module, when being used for that in the opposite end HARQ PDU that reaches maximum HARQ number of retransmissions taken place that ACK is misinterpreted as NACK wrong, sending to the opposite end by sending module and to confirm the erroneous results indication.
The present invention by in receiving end to the affirmation result of the HARQ PDU that reaches maximum HARQ number of retransmissions during for NACK, order is made a start and is postponed the time that residual error reports, can from the affirmation erroneous results indication of receiving end, learn generation ACK/NACK mistake so that make a start, avoiding, successful transmitting HARQ PDU reports as residual error, needn't carry out the re-transmission of ARQ again, in save radio resources, improve efficiency of transmission.
Description of drawings
Fig. 1 is for reaching the example flow diagram of maximum HARQ number of retransmissions in the prior art HARQ transmission;
Fig. 2 is for solving the example flow diagram of NACK/ACK mistake in the prior art HARQ transmission;
Fig. 3 is the flow chart of HARQ transmission method of the present invention;
Fig. 4 is the application example flow diagram of HAQR transmission method of the present invention;
Fig. 5 is the structural representation of HARQ transmitting device of the present invention.
Embodiment
In the HARQ process, carry out before HARQ PDU (Protocol Data Unit, the protocol Data Unit) transmission at every turn, making a start all can send Control message (control messages) and indicate receiving end how to receive subsequently transmission.Be misinterpreted as the ACK mistake in order to detect NACK effectively at the HARQ layer, in the prior art, introduce cause (reason) bit among the Control message before each HARQ PDU transmission, when cause=0, the reason of representing the last end of transmission is to receive ACK because make a start, and will begin to transmit new data; When cause=1, the reason of representing the last end of transmission is not because receive ACK, but because other reason, as reaches situation such as maximum HARQ number of retransmissions.Receiving terminal can judge whether to have taken place the NACK/ACK mistake according to the content of cause bit.
With transmission of data packets shown in Figure 2 is example, and the HARQ that makes a start receives the ARQPDU of the ARQ that makes a start, is converted into HARQ PDU X; The HARQ that makes a start sends Controlmessage to receiving end HARQ, wherein receives the ACK of receiving end transmission last time by the indication of cause position; The HARQ that makes a start afterwards sends the HARQ PDU X of this transmission; Receiving end HARQ learns that from the Control message that receives the ACK that the sent last time HARQ that made a start correctly receives, because the HARQ PDUX mistake that receives subsequently, receiving end HARQ returns NACK to the HARQ that makes a start; The NACK HARQ that made a start is misinterpreted as ACK, thereby the cause position is 0 in the Control message before the transmitting HARQ PDU Y subsequently; Receiving end HARQ finds that from the Control message that this transmission receives the NACK that sent last time HARQ that made a start misreads, and sends the indication of NACK/ACK mistake to the HARQ that makes a start; The HARQ that makes a start reports residual error to the ARQ that makes a start in view of the above.
As seen, receiving end can check termination be received from the Controlmessage how to receive of the next HARQ PDU of indication that makes a start affirmation result identical with the local terminal transmission whether, meeting retransmits HARQ PDU once owing to make a start usually when the ACK/NACK mistake takes place, so receiving end is not confirmed the erroneous results indication to the ACK/NACK mistake usually.
When HARQ PDU reaches maximum HARQ number of retransmissions and the ACK/NACK mistake takes place, receiving end can receive the Control message of cause position 1, and receiving end can judge in view of the above that the ACK/NACK mistake has taken place a last HARQPDU when the last HARQ that reaches maximum retransmission retransmits.Among the present invention, make receiving end send to making a start in this case and confirm the erroneous results indication, notify the HARQ PDU that reaches maximum HARQ number of retransmissions that makes a start to be successfully received.
Simultaneously, in the prior art, after reaching the HARQ maximum retransmission, make a start and confirm that at the NACK that receives receiving end the result reports residual error immediately.And among the present invention, if the ACK/NACK mistake takes place, making a start needs two data transmission procedures just can receive the affirmation erroneous results indication of receiving end at least.Therefore, when HARQ PDU transmission reached maximum HARQ number of retransmissions, order was made a start and wait for certain hour when being received the NACK of receiving end, reports residual error when the affirmation erroneous results indication that can not receive receiving end again.
The flow process of HARQ transmission method of the present invention at step S301, is made a start to receiving end re-transmission HARQ PDU as shown in Figure 3, and this time retransmits the transmission that reaches maximum HARQ number of retransmissions for this HARQ PDU.
At step S302, receiving end successfully receives HARQ PDU, and returns the affirmation information of affirmation result for ACK to receiving end.
At step S303, make a start and resolve the affirmation information that receives, obtain confirming that the result is NACK, ACK/NACK takes place confirmation misreads.
At step S304, making a start judges whether to reach maximum HARQ number of retransmissions, if, execution in step S305; If not, carry out the re-transmission of this HARQ PDU.Step S301 is identical to the flow process of step S304 and the prior art.
At step S305, making a start starts the timing of scheduled wait time.The scheduled wait time by the user in the setting of making a start, whether the scheduled wait time should be not less than receiving end is used to indicate next HARQ PDU how to receive by making a start Control message and detect the affirmation result who receives that makes a start and make a mistake, and notifies when making a mistake and make a start the required time.
At step S306, judge whether the HARQ PDU that reaches maximum HARQ number of retransmissions is the HARQ PDU that isolates, if, execution in step S307; If not, execution in step S308.Among the present invention, isolated HARQ PDU refers to feed back by the Control message of next HARQ PDU receiving end confirmation or the Control message by next HARQ PDU and feeds back the receiving end confirmation and can not satisfy time limit or other demands, increases the HARQ PDU of the signaling transmission of confirming result's feedback and need make a start.With which HARQ PDU as isolated HARQ PDU can be by the user according to practical application request in the setting of making a start.Isolated HARQ PDU generally include make a start and receiving end between last HARQ PDU to be sent in the communication once, in addition, last HARQ PDU to be sent that can also set in the HARQ layer buffering area is isolated HARQ PDU, also can by upper-layer protocol notify the HARQ layer with which HARQ PDU as the HARQ PDU that isolates.
At step S307, make a start affirmation result notification receiving end, change step S309.The Notification Validation result's that makes a start packet can adopt any form with the receiving end agreement, as long as receiving end can therefrom parse the affirmation result who makes a start and understood.The ACK/NACK mistake that step S306 to S307 takes place when being used for that isolated HARQ PDU reached maximum HARQ number of retransmissions detects, and is the optional step among the present invention.
In order to keep the compatibility with prior art as far as possible, can adopt the form of Control message to be used as making a start among the present invention and send the data packet format of confirming result notification to receiving end, with the affirmation result who receives that the cause position 0 among the Controlmessage represented make a start is ACK, puts the 1 expression affirmation result that receives other situation for non-ACK of making a start.In other words, make a start receive the affirmation information of receiving end to isolated HARQ PDU after, send additional Control message to receiving end, this additional Control message is in order to confirm the result notification receiving end, rather than in order to indicate receiving end how to receive next HARQ PDU.
At step S308, make a start affirmation result notification receiving end, and carry out the transmission of next HARQ PDU.In the prior art, the affirmation result who receives with cause position indication local terminal among the Control message before sending next HARQ PDU of making a start.
At step S309, receiving end receives that the cause position is 1 Control message, and the HARQ PDU that this Controlmessage indication receives retransmits HARQ PDU for new HARQ PDU, and receiving end sends to making a start confirms the erroneous results indication.In confirming the erroneous results indication, receiving end can be expressed to make a start the ACK/NACK mistake has taken place.
At step S310, receive the affirmation erroneous results indication of receiving end in the time at scheduled wait if make a start, then cancel residual error and report; If do not receive, then report residual error.
When the HARQ PDU that reaches maximum HARQ number of retransmissions was not the HARQ PDU that isolates, Fig. 4 had provided a kind of flow example of HARQ transmission method of the present invention.The HARQ that makes a start receives ARQ PDU and is converted to HARQ PDU from the ARQ layer of making a start; The HARQ that makes a start sends Control message to receiving end HARQ, is that 0 indication received the ACK information that receiving end sends last time with wherein cause position, is the nack message that 1 indication received receiving end last time with the cause position; The HARQ PDU X mistake that receiving end HARQ receives, HARQ returns NACK to making a start; The HARQ that makes a start receives NACK, and HARQ PDU X is retransmitted; The HARQ that makes a start reaches maximum HARQ number of retransmissions to the transmission of HARQ PDU X; Receiving end HARQ has successfully received HARQ PDU X, but the ACK/NACK mistake takes place its confirmation; The HARQ that makes a start receives the confirmation NACK as a result, because of HARQ PDU X has reached maximum HARQ number of retransmissions, start the timing of scheduled wait time T, and begin to send next HARQ PDU Y, with the cause position of its Control message is 1, shows that the affirmation result who receives is not ACK; Receiving end HARQ learns that according to the Control message of HARQ PDU Y the ACK/NACK mistake takes place in the last transmission of HARQ PDUX, sends to the HARQ that makes a start and confirms the erroneous results indication; The HARQ that makes a start has received the indication of ACK/NACK mistake in the scheduled wait time T, the cancellation residual error reports.
Fig. 5 is the structural representation of HARQ transmitting device of the present invention, and sending module 510 is connected to receiver module 520 by ACK/NACK indicating module 560; Residual error reporting module 530 connects respectively confirms feedback module 550, receiver module 520 and time block 540 as a result; Confirm that feedback module 550 is connected with sending module 510 as a result.
Sending module 510 is finished the transmit operation of HARQ layer, comprises sending Control message, HARQ PDU and confirmation; Receiver module 520 is finished the reception operation of HARQ layer, comprises receiving Control message, HARQ PDU and confirmation.
When this device during as the making a start of HARQ layer, receiver module 520 exports confirmation to residual error reporting module 530 receiving the opposite end when affirmation information of HARQPDU and this HARQ PDU are reached maximum HARQ number of retransmissions.Residual error reporting module 530 is resolved this confirmation, if affirmation result wherein is NACK, then sends instruction and starts time block 540 timing.
Confirm that feedback module 550 generates the packet of confirming result notification as a result, for example can be Controlmessage, and will confirm that result notification is sent to the opposite end by sending module 510.When adopting Controlmessage to notify the opposite end to confirm as a result, if confirming the result is that NACK and this HARQ PDU are isolated HARQ PDU, then residual error reporting module 530 confirmation commands as a result feedback module 550 generate additional Control message, with the affirmation result notification opposite end that will receive.Time block 540 begins the timing of scheduled wait time after receiving instruction, then notify residual error reporting module 530 in timing.
Confirm the erroneous results indication if receiver module 520 receives ACK/NACK from the opposite end, then it is exported to residual error reporting module 530., before notice,, then cancel residual error and report in the timing of receiving time block 540 if residual error reporting module 530 has been received the affirmation erroneous results indication of opposite end; If do not receive, then report residual error.
When this device during as the receiving end of HARQ layer, receiver module 520 is with the Control message of opposite end and confirm that result notification exports ACK/NACK indicating module 560 to.When ACK/NACK indicating module 560 reaches the HARQ PDU generation ACK/NACK mistake of maximum HARQ number of retransmissions when the opposite end, generate ACK/NACK and confirm the erroneous results notice, and send it to the opposite end by sending module 510.
As seen, the present invention introduces timing mechanism and detects the ACK/NACK mistake in receiving end making a start, and the efficiency of transmission that the ACK/NACK mistake caused takes place during the last HARQ that has avoided at HARQ PDU retransmits reduce and the wasting of resources.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.
Claims (10)
1. one kind is mixed automatic request retransmission HARQ transmission method, it is characterized in that, may further comprise the steps:
Make a start and receive the affirmation information of receiving end the HARQ protocol Data Unit PDU that reaches maximum HARQ number of retransmissions;
When the affirmation result in the confirmation is negative acknowledgement NACK, make a start affirmation result notification receiving end;
If in scheduled wait is received receiving end in the time affirmation erroneous results indication, the cancellation residual error of making a start reports.
2. HARQ transmission method as claimed in claim 1 is characterized in that, described method also comprises: receiving end is being made a start when the HARQ PDU that reaches maximum HARQ number of retransmissions taken place that ACK is misinterpreted as NACK wrong, sends to making a start and confirms the erroneous results indication.
3. HARQ transmission method as claimed in claim 1 is characterized in that: described making a start realized affirmation result notification receiving end by control information Control message.
4. HARQ transmission method as claimed in claim 3, it is characterized in that: when the HARQ PDU that reaches maximum HARQ number of retransmissions for isolated HARQ PDU and the affirmation result in the confirmation during for NACK, the described Control message that will confirm the result notification receiving end that makes a start is additional Controlmessage.
5. as any described HARQ transmission method of claim 1 to 4, it is characterized in that described method also comprises: do not receive the affirmation erroneous results indication of receiving end in the time at scheduled wait if make a start, then report residual error.
6. as any described HARQ transmission method of claim 1 to 4, it is characterized in that: the described scheduled wait time is not less than receiving end detection affirmation erroneous results and notice is made a start the required time.
7. a HARQ transmitting device comprises sending module and receiver module, it is characterized in that, also comprise time block, confirm feedback module and residual error reporting module as a result, wherein:
Time block starts the timing of scheduled wait time with cause residual error reporting module, and timing is to back notice residual error reporting module;
Confirm that feedback module is used for will confirming the result notification opposite end by sending module as a result;
The residual error reporting module is used for receiving the affirmation information of opposite end to the HARQ PDU that reaches maximum HARQ number of retransmissions by receiver module, when wherein affirmation result startup time block timing during for NACK; And in timing to before receiving that the opposite end confirms that the cancellation residual error reports under the situation of erroneous results indication.
8. HARQ transmitting device as claimed in claim 7 is characterized in that: described residual error reporting module receives the timing of time block after notice, reports residual error.
9. HARQ transmitting device as claimed in claim 7 is characterized in that: described affirmation feedback module as a result will confirm that the result notification opposite end is by sending Control message realization by sending module to the opposite end;
Described residual error reporting module in the opposite end to the affirmation result of the HARQ PDU that reaches maximum HARQ number of retransmissions for NACK and this HARQ PDU during for isolated HARQ PDU, confirmation command feedback module as a result sends additional Control message to the opposite end.
10. as any described HARQ transmitting device of claim 7 to 9, it is characterized in that: described device also comprises the ACK/NACK indicating module, when being used for that in the opposite end HARQ PDU that reaches maximum HARQ number of retransmissions taken place that ACK is misinterpreted as NACK wrong, send out the contrary erroneous results indication of confirming to the opposite end by sending module.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010111812A1 (en) * | 2009-04-01 | 2010-10-07 | 中兴通讯股份有限公司 | Data repeat method and device in an enhanced multimedia broadcast multicast service |
| CN103563282A (en) * | 2011-03-11 | 2014-02-05 | 三星电子株式会社 | Harq method and apparatus for communication system |
| CN107294580A (en) * | 2016-03-30 | 2017-10-24 | 联芯科技有限公司 | The feedback method and device of pre-coding matrix instruction |
| CN115226135A (en) * | 2021-04-16 | 2022-10-21 | Oppo广东移动通信有限公司 | Information processing method, terminal, chip and storage medium |
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2006
- 2006-06-23 CN CN200610089412A patent/CN101094046B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010111812A1 (en) * | 2009-04-01 | 2010-10-07 | 中兴通讯股份有限公司 | Data repeat method and device in an enhanced multimedia broadcast multicast service |
| CN103563282A (en) * | 2011-03-11 | 2014-02-05 | 三星电子株式会社 | Harq method and apparatus for communication system |
| US9584282B2 (en) | 2011-03-11 | 2017-02-28 | Samsung Electronics Co., Ltd. | HARQ method and apparatus for communication system |
| US10069611B2 (en) | 2011-03-11 | 2018-09-04 | Samsung Electronics Co., Ltd | HARQ method and apparatus for communication system |
| CN107294580A (en) * | 2016-03-30 | 2017-10-24 | 联芯科技有限公司 | The feedback method and device of pre-coding matrix instruction |
| CN107294580B (en) * | 2016-03-30 | 2020-12-11 | 辰芯科技有限公司 | Feedback method and device of precoding matrix indication |
| CN115226135A (en) * | 2021-04-16 | 2022-10-21 | Oppo广东移动通信有限公司 | Information processing method, terminal, chip and storage medium |
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| CN101094046B (en) | 2010-05-12 |
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