CN106301706A - Hybrid automatic repeat-request processing method and system - Google Patents
Hybrid automatic repeat-request processing method and system Download PDFInfo
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- CN106301706A CN106301706A CN201510298502.1A CN201510298502A CN106301706A CN 106301706 A CN106301706 A CN 106301706A CN 201510298502 A CN201510298502 A CN 201510298502A CN 106301706 A CN106301706 A CN 106301706A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1806—Go-back-N protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A kind of hybrid automatic repeat-request processing method, described method includes step: sending direction recipient transmits a SPS package；Receive direction sender and send a feedback message；When described feedback message is negative acknowledgement message, sender judges that this SPS package needs to retransmit, and informs corresponding HARQ procedure ID assigned by the SPS package that recipient retransmits；Sender retransmits described SPS package by dynamic dispatching distribution to recipient；After recipient receives the data packet of a dynamic dispatching distribution, it is judged that the ID of described data packet is the most identical with described HARQ procedure ID；If identical, recipient determines that described data packet is the SPS package retransmitted, and is decoded in conjunction with the SPS package of described re-transmission and the SPS package of initial transmission.The present invention also provides for a kind of hybrid automatic repeat-request processing system.The present invention can be prevented effectively from decoding failure and the extra delay of SPS package.
Description
Technical field
The present invention relates to data transmission technology, especially relate to a kind of hybrid automatic repeat-request processing method and system.
Background technology
Hybrid automatic repeat-request (Hybrid Automatic Repeat
Request, HARQ) it is the scheme that combines with automatic repeat request of forward error correction coding (Forward Error Correction, FEC).When a data packet sends from sender, sender can wait confirmation (Acknowledgement, the ACK) message or Negative Acknowledgement (Negative Acknowledgement, NACK) message that recipient feeds back.If sender receives the NACK message of recipient's feedback, then can this data packet of autonomous retransmission.
Measuring gap (Measurement Gaps, MGs) is the time that recipient may be used for implementing measurement at alien frequencies, during measuring gap generation, cannot be carried out signal transmission and receive between sender and recipient.Therefore, when the action that reception direction sender transmits feedback message occurs with measurement gap simultaneously, this feedback message is likely to lose, and causes sender cannot receive this feedback message.If sender does not receives NACK message, then will not retransmit data packet to recipient.
Semipermanent scheduling (Semi-Persistent Scheduling, SPS) has primary distribution, nonexpondable feature.If sender receives recipient's NACK message for the SPS package of initial transmission, dynamic dispatching distribution will be used to retransmit this SPS package.But, when sending direction recipient transmits SPS package, recipient does not knows corresponding HARQ procedure ID of this SPS package.If recipient receives multiple data packet by dynamic dispatching distribution transmission in similar time, then recipient cannot mate the SPS package of the re-transmission corresponding with the SPS package of initial transmission.Therefore, the data packet of mistake is probably combined with the SPS package of initial transmission and is decoded by recipient, thus causes decoding failure and extra delay.
Summary of the invention
In view of the foregoing, it is necessary to a kind of hybrid automatic repeat-request processing method is provided, the Loss Rate of feedback message can be reduced, and be prevented effectively from decoding failure and the extra delay of SPS package.
In view of the foregoing, there is a need to provide a kind of hybrid automatic repeat-request processing system, the Loss Rate of feedback message can be reduced, and be prevented effectively from decoding failure and the extra delay of SPS package.
Described hybrid automatic repeat-request processing method includes step: sending direction recipient transmits a SPS package；After recipient receives the described SPS package of initial transmission, send a feedback message to sender；Sender receives the feedback message that recipient sends, it is judged that described feedback message is for confirming message or negative acknowledgement message；When described feedback message is negative acknowledgement message, sender judges that described SPS package needs to retransmit；Sender informs corresponding HARQ procedure ID assigned by the SPS package that recipient retransmits；Sender retransmits described SPS package by dynamic dispatching distribution to recipient；After recipient receives the data packet of a dynamic dispatching distribution, it is judged that the ID of described data packet is the most identical with described HARQ procedure ID；When the ID of described data packet is identical with described HARQ procedure ID, recipient determines the SPS package that described data packet is the re-transmission that the SPS package with described initial transmission matches；And the SPS package of recipient's SPS package and described initial transmission of combining described re-transmission is decoded.
Described hybrid automatic repeat-request processing system includes at least one sender and recipient, and sender is for transmitting a SPS package to recipient；Recipient, for after receiving the SPS package of this initial transmission, sends a feedback message to sender；Sender is additionally operable to receive the feedback message that recipient sends, judge that described feedback message is as confirming message or negative acknowledgement message, and when described feedback message is negative acknowledgement message, judge that described SPS package needs to retransmit, inform corresponding HARQ procedure ID assigned by the SPS package that recipient retransmits, and retransmit described SPS package by dynamic dispatching distribution to recipient；And recipient is additionally operable to after the data packet receiving a dynamic dispatching distribution, judge that the ID of described data packet is the most identical with described HARQ procedure ID, when the ID of described data packet is identical with described HARQ procedure ID, recipient determines the SPS package that described data packet is the re-transmission that the SPS package with described initial transmission matches, and the SPS package of the SPS package and described initial transmission combining described re-transmission is decoded.
Compared to prior art, described hybrid automatic repeat-request processing method and system, can be shortened by measuring the time in gap or reducing the quantity in measurement gap to reduce the Loss Rate of feedback message, and by informing corresponding HARQ procedure ID assigned by the SPS package that recipient retransmits, so that recipient can be with the SPS package of the SPS package of matched retransmission Yu initial transmission, it is to avoid the decoding failure of SPS package and extra delay.
Accompanying drawing explanation
Fig. 1 is the Organization Chart of hybrid automatic repeat-request processing system preferred embodiment of the present invention.
Fig. 2 is the flow chart of hybrid automatic repeat-request processing method preferred embodiment of the present invention.
Fig. 3 is the another kind of form of expression of the flow chart of hybrid automatic repeat-request processing method preferred embodiment of the present invention.
Main element symbol description
| Hybrid automatic repeat-request processing system | 2 |
| Sender | 10 |
| Recipient | 20 |
Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Detailed description of the invention
Refering to shown in Fig. 1, it it is the Organization Chart of hybrid automatic repeat-request processing system preferred embodiment of the present invention.In the present embodiment, hybrid automatic repeat-request processing system 2 is applied in Long Term Evolution (Long Term Evolution, the LTE) network architecture, including sender 10 and recipient 20.Sender 10 transmits data packet by network to recipient 20, and recipient 20 sends feedback message for the data packet received to sender 10.Wherein, sender 10 is evolved Node B(Evolved Node B, eNB), recipient 20 is subscriber equipment (User Equipment, UE).
Sender 10 is for transmitting a SPS package to recipient 20.
Recipient 20, for after receiving the SPS package of this initial transmission, sends a feedback message to sender 10.Described feedback message can be to confirm message or negative acknowledgement message.If the SPS package of this initial transmission receives correct, it is decoded by recipient 20, and to sender 10 feeding back confirmation message.If the SPS package of this initial transmission receives mistake, recipient 20 decodes it failure, then recipient 20 preserves the SPS package of this initial transmission, and feeds back negative acknowledgement message to sender 10.
In the present embodiment, recipient 20 is shortened by measuring the time in gap or reducing the quantity in measurement gap to reduce the Loss Rate of feedback message.Specifically, recipient 20 can shorten the time in measurement gap by arranging return different-frequency measure result earlier.Generally, the default value measuring gap is 6 milliseconds, but the most most of different-frequency measure has only to 1 ~ 2 millisecond can complete, and therefore, it can be set to when 2 milliseconds return different-frequency measure result, thus shortens measurement gap.It addition, when the different-frequency measure result of recipient 20 be in preset period of time signal quality preferable time, it is possible to reduce the number of times of different-frequency measure, i.e. reduce measure gap quantity.Therefore, recipient 20 is sent to the feedback message of sender 10 and will effectively reduce the probability of loss.
Sender 10 waits the recipient 20 feedback message for this SPS package.After sender 10 receives the feedback message that recipient 20 sends, it is judged that described feedback message is for confirming message or negative acknowledgement message.If confirmation message, then sender 10 continues to transmit next SPS package to recipient 20.If negative acknowledgement message, then sender 10 judges that this SPS package needs to retransmit, by wireless heterogeneous networks (Radio Resource Control, RRC) line reconfigure information, inform corresponding HARQ procedure ID assigned by the SPS package that recipient 20 retransmits, then retransmit this SPS package by dynamic dispatching distribution to recipient 20.
After recipient 20 receives the data packet of a dynamic dispatching distribution, it is judged that the ID of this data packet is the most identical with this HARQ procedure ID.If identical, then recipient 20 determines the SPS package that this data packet is the re-transmission that the SPS package with this initial transmission matches, and the SPS package of the SPS package and initial transmission combining this re-transmission is decoded.If differing, then recipient 20 determines that this data packet is other data packets, carries out other and processes accordingly.
Refering to shown in Fig. 2, it it is the flow chart of hybrid automatic repeat-request processing method preferred embodiment of the present invention.
Step S10, sender 10 transmits a SPS package to recipient 20.
Step S12, after recipient 20 receives the SPS package of this initial transmission, sends a feedback message to sender 10.Described feedback message can be to confirm message or negative acknowledgement message.If the SPS package of this initial transmission receives correct, it is decoded by recipient 20, and to sender 10 feeding back confirmation message.If the SPS package of this initial transmission receives mistake, recipient 20 decodes it failure, then recipient 20 preserves the SPS package of this initial transmission, and feeds back negative acknowledgement message to sender 10.
In the present embodiment, recipient 20 is shortened by measuring the time in gap or reducing the quantity in measurement gap to reduce the Loss Rate of feedback message.Specifically, recipient 20 can shorten the time in measurement gap by arranging return different-frequency measure result earlier.It addition, when the different-frequency measure result of recipient 20 be in preset period of time signal quality preferable time, it is possible to reduce the number of times of different-frequency measure, i.e. reduce measure gap quantity.
Step S13, after sender 10 receives the feedback message that recipient 20 sends, it is judged that described feedback message is for confirming message or negative acknowledgement message.If confirmation message, then return step S10, continue to transmit next SPS package to recipient 20.If negative acknowledgement message, then perform step S14.
Step S14, sender 10 judges that this SPS package needs to retransmit.
Step S16, sender 10 reconfigures information by RRC line, informs corresponding HARQ procedure ID assigned by the SPS package that recipient 20 retransmits.
Step S18, sender 10 retransmits this SPS package by dynamic dispatching distribution to recipient 20.
Step S20, after recipient 20 receives the data packet of a dynamic dispatching distribution, it is judged that the ID of this data packet is the most identical with this HARQ procedure ID.If identical, then perform step S22-S24；If differing, then perform step S26.
Step S22, recipient 20 determines the SPS package that this data packet is the re-transmission that the SPS package with this initial transmission matches.
Step S24, the SPS package of SPS package and initial transmission that recipient 20 combines this re-transmission is decoded.
Step S26, recipient 20 determines that this data packet is other data packets.
Refering to shown in Fig. 3, for the another kind of form of expression of the flow chart of above-mentioned hybrid automatic repeat-request processing method.
Above example is only in order to illustrate technical scheme and unrestricted, although the present invention being described in detail with reference to preferred embodiment, it will be understood by those within the art that, technical scheme can be modified or equivalent, without deviating from the spirit and scope of technical solution of the present invention.
Claims (10)
1. a hybrid automatic repeat-request processing method, is applied in Long Term Evolution LTE network framework, it is characterised in that the method comprising the steps of:
Sending direction recipient transmits a semipermanent scheduling SPS package；
After described recipient receives the described SPS package of initial transmission, send a feedback message to described sender；
Described sender receives the described feedback message that described recipient sends, it is judged that described feedback message is for confirming message or negative acknowledgement message；
When described feedback message is negative acknowledgement message, described sender judges that described SPS package needs to retransmit；
Described sender informs corresponding hybrid automatic repeat-request HARQ procedure ID assigned by the SPS package that described recipient retransmits；
Described sender retransmits described SPS package by dynamic dispatching distribution to described recipient；
After described recipient receives the data packet of a dynamic dispatching distribution, it is judged that the ID of described data packet is the most identical with described HARQ procedure ID；
When the ID of described data packet is identical with described HARQ procedure ID, described recipient determines the SPS package that described data packet is the re-transmission that the SPS package with described initial transmission matches；And
The SPS package of SPS package and described initial transmission that described recipient combines described re-transmission is decoded.
2. hybrid automatic repeat-request processing method as claimed in claim 1, it is characterised in that described sender reconfigures information by radio resource control RRC line, informs corresponding HARQ procedure ID assigned by the SPS package that described recipient retransmits.
3. hybrid automatic repeat-request processing method as claimed in claim 1, it is characterised in that the method further comprises the steps of:
When the ID of described data packet differs with described HARQ procedure ID, described recipient determines that described data packet is other data packets.
4. hybrid automatic repeat-request processing method as claimed in claim 1, it is characterised in that described recipient is shortened by measuring the time in gap or reducing the quantity in measurement gap to reduce the Loss Rate of described feedback message.
5. hybrid automatic repeat-request processing method as claimed in claim 4, it is characterized in that, described recipient shortens the time in measurement gap by arranging return different-frequency measure result earlier, or when different-frequency measure result be in preset period of time signal quality preferable time, reduce the number of times of different-frequency measure, thus reduce the quantity measuring gap.
6. a hybrid automatic repeat-request processing system, this system is applied in Long Term Evolution LTE network framework, including at least one sender and recipient, it is characterised in that:
Described sender is for transmitting a semipermanent scheduling SPS package to recipient；
Described recipient, for after receiving the described SPS package of initial transmission, sends a feedback message to described sender；
Described sender is additionally operable to receive the described feedback message that described recipient sends, judge that described feedback message is as confirming message or negative acknowledgement message, and when described feedback message is negative acknowledgement message, judge that described SPS package needs to retransmit, inform corresponding hybrid automatic repeat-request HARQ procedure ID assigned by the SPS package that described recipient retransmits, and retransmit described SPS package by dynamic dispatching distribution to described recipient；And
Described recipient is additionally operable to after the data packet receiving a dynamic dispatching distribution, judge that the ID of described data packet is the most identical with described HARQ procedure ID, when the ID of described data packet is identical with described HARQ procedure ID, described recipient determines the SPS package that described data packet is the re-transmission that the SPS package with described initial transmission matches, and the SPS package of the SPS package and described initial transmission combining described re-transmission is decoded.
7. hybrid automatic repeat-request processing system as claimed in claim 6, it is characterised in that described sender reconfigures information by radio resource control RRC line, informs corresponding HARQ procedure ID assigned by the SPS package that recipient retransmits.
8. hybrid automatic repeat-request processing system as claimed in claim 6, it is characterised in that described recipient is additionally operable to, when the ID of described data packet differs with described HARQ procedure ID, determine that described data packet is other data packets.
9. hybrid automatic repeat-request processing system as claimed in claim 6, it is characterised in that described recipient is additionally operable to the quantity in time or the minimizing measurement gap being shortened by measuring gap to reduce the Loss Rate of described feedback message.
10. hybrid automatic repeat-request processing system as claimed in claim 9, it is characterized in that, described recipient shortens the time in measurement gap by arranging return different-frequency measure result earlier, or when different-frequency measure result be in preset period of time signal quality preferable time, reduce the number of times of different-frequency measure, thus reduce the quantity measuring gap.
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Cited By (1)
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