CN100531023C - Method and apparatus for condition report feedback - Google Patents

Method and apparatus for condition report feedback Download PDF

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Publication number
CN100531023C
CN100531023C CNB2007100639829A CN200710063982A CN100531023C CN 100531023 C CN100531023 C CN 100531023C CN B2007100639829 A CNB2007100639829 A CN B2007100639829A CN 200710063982 A CN200710063982 A CN 200710063982A CN 100531023 C CN100531023 C CN 100531023C
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Prior art keywords
pdu
sub
feedback
status report
zone
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CN101247209A (en
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刘佳敏
毕海洲
李国庆
高卓
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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Priority to CNB2007100639829A priority Critical patent/CN100531023C/en
Priority to PCT/CN2008/070317 priority patent/WO2008098523A1/en
Publication of CN101247209A publication Critical patent/CN101247209A/en
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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
    • H04L1/1809—Selective-repeat protocols
    • 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
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1628—List acknowledgements, i.e. the acknowledgement message consisting of a list of identifiers, e.g. of sequence numbers

Abstract

The present invention discloses a method of feedback condition report, which includes the following steps: according to receiving end receiving condition, PDU condition reporting is created with wrong sub-segment identification when PDU segmentation receiving condition need feedback; condition reporting feed back to sending terminal. The present invention specially points out wrong sub-segment identification in the condition reporting, which make feedback more accuracy. Accordingly, according to specially indication of condition reporting, only wrong sub-segment is re-transmitted at sending terminal, this can avoid needless re-transmitted, save system cost, improve system throughput. The present invention also provides an feedback condition reporting equipment which can execute effective feedback for PDU wrong sub-segment.

Description

The method and apparatus of condition report feedback
Technical field
The present invention relates to the time-division synchronously-code division multiple access inserts (TD-SCDMA) technical field, relates in particular to a kind of Radio Link control (Radio Link Control, RLC) method and apparatus of receiving terminal condition report feedback.
Background technology
Rlc layer affirmation mode (Acknowledged Mode in the TD-SCDMA system, AM) improve protocol Data Unit (Protocol DataUnit by receiving terminal feedback mechanism and transmitting terminal retransmission mechanism, PDU) Chuan Shu correct probability, receiving terminal notifies transmitting terminal PDU successfully to receive by sending one or more status report, perhaps the PDU that makes a mistake of request retransmission.After transmitting terminal receives status report, discharge and to have confirmed the shared buffer memory of PDU that successfully receives, perhaps the PDU of request retransmission is carried out necessary re-transmission according to status report.
The most basic status report of receiving terminal has two types: a kind of is to represent the correctly information of the PDU of reception with ACK; And another kind is in order to the detected not information of the correct PDU that receives of expression receiving terminal.The incorrect form that receives of expression has three kinds, is respectively LIST, BITMAP and RLIST, and in order under different incorrect reception conditions, expression more efficiently is the information of the correct PDU that receives not.In above-mentioned these three kinds of status reports, all identify with the PDU sequence number.Referring to Fig. 1, be the status report example of LIST form, wherein, Type=LIST represents the status report format type, and SN1, SN2 and SNi represent correctly not receive the sequence number of PDU.Transmitting terminal according to the PDU sequence number, retransmits whole PDU to receiving terminal after receiving the LIST status report of receiving terminal feedback.
But for the system of Zhi Chichong segmentation, there is the not accurate enough problem of feedback in aforesaid way.
What is called is segmentation heavily, is meant transmitting terminal when preparing to resend PDU, finds that resource is not enough, therefore need carry out segmentation once more according to the big young pathbreaker PDU of resource.For example, in LTE (Long termEvolution),, need support the heavily segmentation of PDU at rlc layer owing to support modulation coding mode and link circuit self-adapting requirement more flexibly.
Under the situation of transmitting terminal Zhi Chichong segmentation, the incorrect PDU that receives might be whole PDU, but also might only be that problem has appearred in part PDU section, under latter event, existing receiving terminal also will report whole PDU sequence number, correspondingly so, transmitting terminal can retransmit whole PDU according to status report, correct son section is also carried out unnecessary retransmission, caused the wasting of resources, reduced throughput of system.
Summary of the invention
In view of this, the invention provides a kind of method and apparatus of condition report feedback, in order to solve the not accurate enough problem of status report of existing scheme feedback;
For this reason, the present invention adopts following technical scheme:
A kind of method of condition report feedback comprises:
Establishment comprises the PDU status report of the sub-segment identification of mistake;
Described status report is fed back to transmitting terminal.
Described sub-segment identification is represented by sub-fragment position and sub-segment length;
Perhaps,
Described sub-segment identification is meant sub-segment labeling.
Also comprise the segmentation indication in the described status report, the corresponding PDU feedback information of segmentation indication;
For feedback information, the segmentation indication is changed to first value at whole wrong PDU; For feedback information, the segmentation indication is changed to second value at PDU mistake section.
Also comprise the zone indication in the described status report, a zone of zone indication corresponding states report:
For zone, the zone indication is changed to the 3rd value at whole wrong PDU feedback; Zone at PDU mistake section feedback is changed to the 4th value with the zone indication.
Described method also comprises:
The report of transmitting terminal parse state retransmits described wrong son section.
Also comprise the PDU sequence number in the described status report.
A kind of equipment of condition report feedback comprises:
The feedback interface unit: the status report that will show the PDU reception condition feeds back to transmitting terminal;
Status report creating unit: create the PDU status report that comprises the sub-segment identification of mistake.
Described status report creating unit comprises:
Sub-segment identification unit provides the sub-segment identification of being made up of sub-fragment position and sub-segment length.
Described status report creating unit comprises:
Sub-segment identification unit provides the sub-segment identification of being made up of sub-segment labeling.
Described status report creating unit also comprises:
The segmentation indicating member provides the segmentation indication that whether needs to feed back the son section, the feedback information of a corresponding PDU of segmentation indication;
For feedback information, the segmentation indication is changed to first value at whole wrong PDU;
For feedback information, the segmentation indication is changed to second value at PDU mistake section.
Described status report creating unit also comprises:
The zone indicating member provides the zone indication that whether needs to feed back the son section, a zone of zone indication corresponding states report:
For zone, the zone indication is changed to the 3rd value at whole wrong PDU feedback;
Zone at PDU mistake section feedback is changed to the 4th value with the zone indication.
The embodiment of the invention specifically indicates the information of wrong son section in status report, make feedback more accurate.Correspondingly,,, only retransmit wrong son section, avoided unnecessary re-transmission, saved overhead, improved throughput of system according to the concrete indication of status report at transmitting terminal.
Description of drawings
Fig. 1 is a prior art LIST status report schematic diagram;
Fig. 2 is the embodiment of the invention one flow chart;
Fig. 3 is an embodiment of the invention two-state reporting format schematic diagram;
Fig. 4 is the embodiment of the invention two PDU reception condition schematic diagrames;
Fig. 5 is embodiment of the invention two-state report schematic diagram;
Fig. 6 is the embodiment of the invention three PDU reception condition schematic diagrames;
Fig. 7 is embodiment of the invention three condition report schematic diagram;
Fig. 8 is the embodiment of the invention four PDU reception condition schematic diagrames;
Fig. 9 is embodiment of the invention four condition report schematic diagram;
Figure 10 is the present device structural representation.
Embodiment
Embodiment of the invention core concept is when receiving terminal is reported at structural state, to have increased the sign to wrong son section.
Introduce embodiment one below:
Be different from standing state report only with PDU sequence number label manner,, in status report, add corresponding sub-segment identification at the heavy characteristics of segmentation of PDU, wrong with which a little section of concrete expression, so that transmitting terminal only effectively retransmits at this part son section.
Referring to Fig. 2, be the flow chart of embodiment one.
Embodiment one comprises:
Step 201: create the PDU status report that comprises the sub-segment identification of mistake;
Step 202: described status report is fed back to transmitting terminal.
Clearly represent the correct son section that receives by the sub-segment identification of mistake, this wrong sub-segment identification is in conjunction with original PDU sequence number, can inform clearly that transmitting terminal is that problem section has appearred in which (a bit) son of which PDU.
Correspondingly, transmitting terminal is after receiving status report, can be according to the wrong sub-segment identification in the status report, only the wrong son section with certain PDU retransmits, and, think that then receiving terminal correctly receives for the son section that does not have sign of this PDU, can not carry out non-essential re-transmission, thereby avoided the wasting of resources, improved the throughput of system.
Introduce embodiment two below:
On the basis of embodiment one, present embodiment provides a kind of mode of creating the status report that has sub-segment identification.
If whole PDU receives mistake, just need whole PDU accepting state is fed back, then directly use the sequence number SN of PDU in the status report; If certain of PDU (a bit) section takes place to receive mistake, just need the son section of PDU is fed back, then use the SN of PDU to add corresponding sub-segment identification in the status report and identify.
For example, can adopt the form of status report format shown in Figure 3.
Wherein:
Reseg_flag: segmentation indication;
Reseg_flag represents whether to carry out the sign of PDU segmentation indication, the corresponding PDU feedback information of Reseg_flag.The Reseg_flag size can be 1bit.
During concrete operations, do not needing under the situation of segmentation indication Reseg_flag to be changed to first value, for example ' 0 '; Needing under the situation of segmentation indication Reseg_flag to be changed to second value, for example ' 1 '.Whether need the segmentation indication thereby clearly distinguish.
The SN:PDU sequence number;
Reseg_info: sub-segment identification;
Reseg_info specifically is which (a bit) son section among the SN PDU needs re-transmission in order to expression.
In a status report, can comprise the mixed information of whole PDU and PDU section simultaneously, every information is distinguished form by Reseg_flag; The information that also can comprise a plurality of complete PDU and a plurality of PDU section.
When concrete operations Reseg_info, can adopt the mode of " sub-fragment position (Offset)+sub-segment length (Length) " to represent.Describe the method for expressing of this kind Reseg_info in detail referring to Fig. 4 and Fig. 5.
Referring to Fig. 4, be the reception condition schematic diagram of each PDU.Wherein, the parton section of PDU0, PDU1, PDU3 and PDU2 all receives correctly, has only PDU2 pars intermedia molecule section to receive mistake.At this moment, will organize as follows at the status report of PDU2:
Reseg_flag: be changed to ' 1 ', show that the correct information that receives that this time reports is the sub-section of PDU;
SN: be changed to 2, show that the son section of PDU2 needs to retransmit;
The sub-segment identification of Reseg_info adopts two territories to represent: Offset and Length:
Offset: be set to 100, what show the needs re-transmission is the position of the 100th unit (byte or bit) from PDU2;
Length: be set to 200, show that the sub-segment length that needs retransmit is 200 units (byte or bits).
Above-mentioned by " Offset+Length " these two territories, can unique definite position and size that needs the data of re-transmission.
Referring to Fig. 5, at the correct PDU status report that receives among Fig. 4.Wherein:
Reseg_flag=1, representative is at the feedback of son section;
SN=2, representative is PDU2;
Offset=100, representative is from the 100th unit of PDU2;
Length=200, the sub-segment length that representative needs to retransmit is 200 units.
Receiving terminal can clearly know that at transmitting terminal which partial data needs to retransmit by the such status report of feedback, thereby avoids the situation of unnecessary re-transmission.
Introduce embodiment three below:
On the basis of embodiment one, present embodiment provides a kind of mode of creating the status report that has sub-segment identification.
Identical with embodiment two, also adopt status report format shown in Figure 3.But difference is that sub-segment identification Reseg_info does not adopt the mode of " Offset+Length ", but represents by the mode of sub-segment labeling Sub_index.
Referring to Fig. 6, be the reception condition schematic diagram of certain each PDU of period.Wherein, the sub1 of whole PDU0, PDU3 and PDU2 and sub3 section receive correct, and the sub2 of whole PDU1 and PDU2 section receives mistake.
Referring to Fig. 7, at the correct PDU status report that receives among Fig. 6.
Wherein:
Reseg_flag1=0, representative is at the feedback of whole PDU;
SN1=1 represents PDU1;
Reseg_flag2=1, representative is at the feedback of PDU section;
SN2=2 represents PDU2;
Sub_index=2, the 2nd sub section of representing PDU2.
By feeding back status report shown in Figure 7, it specifically is which son section makes a mistake that receiving terminal can clearly indicate; And transmitting terminal also can clearly be known the son section that need to retransmit, and carries out necessary re-transmission at wrong son section, avoids the problem of the wasting of resources that unnecessary retransmission brings.
Introduce embodiment four below:
On the basis of embodiment one, be different from the mode that embodiment two or embodiment three adopt Reseg_flag, present embodiment adopts " zone indication " to come the structural state report.
Region_flag: zone indication;
A zone of Region_flag corresponding states report, in the present embodiment, status report has two zones: at the zone of whole PDU feedback, and at the zone of PDU parton section feedback.The Region_flag size can be 1bit.
During concrete operations, under situation, Region_flag is changed to the 3rd value, for example ' 0 ' at whole PDU feedback; Under situation, Region_flag is changed to the 4th value, for example ' 1 ' at PDU parton section.Thereby clearly distinguishing is to belong to which zone.
Which when Region_flag represents status report at whole PDU, only need to represent it is PDU by PDU sequence number SN; When Region_flag represents status report at PDU parton section, after representing to be which PDU, show it specifically is which (a bit) son section by sub-segment identification Reseg_info by PDU sequence number SN.
Wherein, sub-segment identification Reseg_info still can adopt the mode of embodiment two " Offset+Length "; Also can adopt the mode of the sub-segment labeling Sub_index among the embodiment three to represent.
Referring to Fig. 8, for certain period receives PDU situation schematic diagram.
Wherein, except that correct reception of sub2, sub3 of whole PDU0 and PDU4, the sub1, the sub3 that reach PDU2 and PDU4, whole PDU1, PDU3 and PDU5, the sub2 that reaches PDU2 and the sub1 of PDU4 receive mistake.
Referring to Fig. 9, at the correct PDU status report that receives among Fig. 8.
Wherein:
Region_flag=0, representative is at the feedback of whole PDU;
SN1=1 represents PDU1;
SN2=3 represents PDU3;
SN3=5 represents PDU5;
Above-mentioned SN1, SN2 and SN3 belong to the Region_flag=0 zone, show the whole PDU mistake that they represent.
Region_flag=1, representative is at the feedback of PDU parton section;
SN4=2 represents PDU2;
Sub_index4=2, the 2nd sub section of representing PDU2;
SN5=4 represents PDU4;
Sub_index5=1, the 1st sub section of representing PDU4.
Above-mentioned SN4 and SN5 belong to the Region_flag=1 zone, show the PDU parton core dumped that they represent, and specifically are which son section is indicated by Sub_index4 and Sub_index5.
Wherein, except that the mode that adopts above-mentioned sub-segment labeling Sub_index, also can adopt the mode of " Offset+Length " for sub-segment identification.
By status report shown in Figure 9, whole PDU feedback information is put together, and PDU parton section feedback information puts together, thus the sign that needn't carry out whether segmentation to each PDU.And, in PDU parton section feedback areas, adopt the mode of PDU sequence number and sub-segment identification, can the wrong sub section information of unique expression.
By the introduction of top four method embodiment, as seen, the present invention does not have the correct PDU that receives for part, specifically indicates the information of wrong son section in status report, makes feedback more accurate.Correspondingly,,, only retransmit wrong son section, avoided unnecessary re-transmission, saved overhead, improved throughput of system according to the concrete indication of status report at transmitting terminal.
Based on said method, the present invention also provides a kind of equipment of condition report feedback, specifically is meant the RLC entity of RLC receiving terminal, and it also has the function of the concrete wrong son section status report of feedback except that the function with general RLC entity.
Referring to Figure 10, be the internal structure schematic diagram of equipment provided by the invention.This equipment comprises status report creating unit 1001 and feedback interface unit 1002.Wherein:
Feedback interface unit 1001: the status report that is used for showing the PDU reception condition feeds back to transmitting terminal RLC entity.
Status report creating unit 1002, be the core cell of present device, be used to create the PDU status report, wherein, the PDU sequence number (SN) in the PDU status report in comprising the present condition report, also comprise the sub-segment identification (Reseg_info) of mistake section.Embodiment is referring to method embodiment one.
For status report creating unit 1002, it comprises sub-segment identification unit.
Sub-segment identification unit provides the sub-segment identification of being made up of sub-fragment position of mistake (Offset) and wrong sub-segment length (Length), specifically referring to method embodiment two.
Perhaps, sub-segment identification unit provides the sub-segment identification of being made up of sub-segment labeling (sub_index), specifically referring to method embodiment three.
Status report creating unit 1002 also comprises the segmentation indicating member.The segmentation indicating member provides the segmentation indication (Reseg_flag) that whether needs to feed back the son section: for the feedback at whole wrong PDU, the segmentation indication is changed to first value; For feedback, the segmentation indication is changed to second value at PDU mistake section.Specifically implement referring to method embodiment two or method embodiment three.
Perhaps, status report creating unit 1002 also comprises regional indicating member.The zone indicating member is used to provide the zone indication (Region_flag) that whether needs to feed back the son section: for all feedbacks at whole wrong PDU, the zone indication is changed to the 3rd value; For all feedbacks, the zone indication is changed to the 4th value at PDU mistake section.Embodiment is referring to method embodiment four.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (6)

1, a kind of method of condition report feedback is applied to the Long Term Evolution LTE system of mobile communication, it is characterized in that, comprising:
Establishment comprises the PDU status report of PDU sequence number and the sub-segment identification of PDU mistake; Also comprise the zone indication in the described status report, the zone that zone indication corresponding states is reported:, respectively the zone indication is changed to different values at the zone of whole wrong PDU feedback and the zone of feeding back at PDU mistake section;
Described status report is fed back to transmitting terminal.
2, the method for condition report feedback according to claim 1 is characterized in that, described sub-segment identification is represented by sub-fragment position and sub-segment length.
3, the method for condition report feedback according to claim 1 is characterized in that, described sub-segment identification is meant sub-segment labeling.
4, a kind of equipment of condition report feedback is applied to the Long Term Evolution LTE system of mobile communication, comprising:
The feedback interface unit will show that the status report of PDU reception condition feeds back to transmitting terminal;
It is characterized in that, also comprise:
The status report creating unit is created the PDU status report that comprises PDU sequence number and the sub-segment identification of PDU mistake;
Described status report creating unit comprises:
Regional indicating member provides the zone indication, the zone that zone indication corresponding states is reported: at the zone of whole wrong PDU feedback and the zone of feeding back at PDU mistake section, respectively the zone indication is changed to different values.
5, the equipment of condition report feedback according to claim 4 is characterized in that, described status report creating unit comprises:
Sub-segment identification unit provides the sub-segment identification of being made up of sub-fragment position and sub-segment length.
6, the equipment of condition report feedback according to claim 4 is characterized in that, described status report creating unit comprises:
Sub-segment identification unit provides the sub-segment identification of being made up of sub-segment labeling.
CNB2007100639829A 2007-02-15 2007-02-15 Method and apparatus for condition report feedback Active CN100531023C (en)

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PCT/CN2008/070317 WO2008098523A1 (en) 2007-02-15 2008-02-15 A method and device for returning the status report

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Application Number Priority Date Filing Date Title
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CN101771518B (en) * 2008-12-29 2013-06-12 电信科学技术研究院 Method, device and system for sending status report
CN103999394B (en) * 2012-11-16 2017-05-10 华为技术有限公司 Data retransmission and feedback methods, and corresponding apparatus
CN107203564B (en) * 2016-03-18 2020-11-24 北京京东尚科信息技术有限公司 Data transmission method, device and system
CN110958084B (en) * 2018-09-27 2021-12-14 华为技术有限公司 Method and communication equipment for transmitting acknowledgement message

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US7310336B2 (en) * 2001-05-18 2007-12-18 Esa Malkamaki Hybrid automatic repeat request (HARQ) scheme with in-sequence delivery of packets
US6987981B2 (en) * 2001-11-13 2006-01-17 Asustek Computer Inc. Robust RLC reset procedure in a wireless communication system
DE10252533A1 (en) * 2002-11-08 2004-05-27 Philips Intellectual Property & Standards Gmbh Transmission method of data packets from transmitter to receiver, involves retransmission of selected left over data packets in another container during transmission abortion
CN100512506C (en) * 2004-05-12 2009-07-08 华为技术有限公司 Method for transferring status report
US7391758B2 (en) * 2004-09-29 2008-06-24 Intel Corporation UMTS radio link control with full concatenation

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