CN101924621A - Method for data transmission of wireless link and wireless communication network node - Google Patents
Method for data transmission of wireless link and wireless communication network node Download PDFInfo
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- CN101924621A CN101924621A CN2009102037635A CN200910203763A CN101924621A CN 101924621 A CN101924621 A CN 101924621A CN 2009102037635 A CN2009102037635 A CN 2009102037635A CN 200910203763 A CN200910203763 A CN 200910203763A CN 101924621 A CN101924621 A CN 101924621A
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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
- H04L1/1607—Details of the supervisory signal
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Abstract
The invention provides a method for the data transmission of a wireless link, Under the condition that a wireless link controls the reconstruction of an RLC entity, the method comprises the following steps of: after the RLC entity receives reconstruction indication, reporting sending status information of a service data unit SDU to a high level; and after the RLC entity is reconstructed, determining the service data unit SDU to be resent by the high level according to the sending status information reported by the RLC entity. The method and the wireless communication network node can improve the transmission efficiency of an AM RLC entity.
Description
Technical field
The present invention relates to the radio digital communication field, relate in particular to data wireless links transmission method and wireless communication network node.
Background technology
The universal mobile telecommunications system of evolution (Universal Mobile TelecommunicationsSystem, UMTS) terrestrial radio Access Network (Evolved UMTS Terrestrial Radio AccessNetwork, E-UTRAN) wireless chain control layer comprises three types RLC (Radio Link control, Radio Link Control) entity: transparent mode (Transparent Mode, TM), Unacknowledged Mode (Unacknowledged Mode, UM) and affirmation mode (Acknowledged Mode, AM).Wherein the automatic repeat requests ARQ of AM RLC entity utilization (Automatic RetransmissionRequest) mechanism provides the reliable data transmission service.
In the ARQ function of AM RLC entity, AM RLC entity at first sends RLC data protocol data cell (RLC Data Protocol Data Unit, RLC Data PDU) to the receiver side of reciprocity AM RLC entity, reciprocity AM RLC entity receives these RLC Data PDU and detects poll mark domain in these bags.When detecting poll, under situation about satisfying condition, reciprocity AM RLC entity can be given AM RLC entity by transmit status PDU (STATUS PDU), the reception condition of report peer-entities.For among the STATUS PDU indication lose or receive incomplete RLC Data PDU, AM RLC entity can retransmit the related data part; Be shown as the RLC Data PDU that merit is transmitted for STATUS PDU middle finger,, under situation about satisfying condition, give the high-rise notice that data are successfully transmitted that sends if wherein comprised complete high-rise PDU.
AM RLC entity can be rebuild by high level, and transmitter side empties all bufferings in AM RLC volume reconstruction, stops all timers that resets, and all state variables that resets; At first will be buffered in those discontinuous RLC Data PDU that receive buffering area at receiver side and be reassembled as high-rise PDU, and send to high level by ascending order, and empty buffering area then, all timers and all state variables that reset at last stop to reset.The process of reconstruction of AM RLC entity is seen Fig. 1.
Transmitter side at AM RLC entity is safeguarded a window, sending window is made up of three state variables, they are to confirm state variable (Acknowledgement status variable, VT (A)), maximum send state variable (Maximum send state variable, VT (MS)) and send state variable (Send state variable, VT (S)).VT (A) has preserved RLC Data PDU to have confirmed that (Sequence Number SN), also is the lower bound that sends window, and the transmission window moves forward when VT (A) upgrades for the sequence number of the next RLC Data PDU that receives one after another.VT (MS) is the upper bound that sends window, and its value equals VT (A)+AM_Window_Size.VT (S) is the SN of the next one RLC Data PDU that will produce.
(in the Long Term Evolution (Long Time Evolution, LTE) 36.322V850), the processing procedure that AM RLC entity transmitter side sends data success transmission notice to high level as shown in Figure 2 at the consensus standard of current E-UTRAN.We have only after VT (A) obtains confirming as can be seen in Fig. 2, just might give the high-rise notice that data are successfully transmitted that sends.Processing can reduce the frequency of RLC transmission message to high level like this, but this just means if VT (A) is not when upgrading, even if there is other high-rise PDU successfully to send, also can not give high-rise notice.If do not rebuild in transmission course, after all data all successfully sent, the affirmation of these data finally can report high level after the renewal of VT (A).If but in transmission course, to rebuild, the discontinuous data that the meeting of so reciprocity AM RLC entity will receive are submitted to high level, and the transmitter side of AM RLC entity can empty the data buffer zone.At this moment, the data that those reciprocity RLC entities have been confirmed (when rebuilding, also having submitted to high level), the message informing transmitter side high level that RLC entity transmitter side may can successfully not send it because VT (A) does not have to upgrade.Those high-rise PDU that successfully sent sent to notify owing in time not succeeding and retransmit after this will cause and rebuild.
In some cases, this problem can be very serious.For example: at receiver side, if the packet that VT (A) points to never successfully receives, and other packet in the receiver window all successfully receives (size of receiver window is 512), at this moment RLC entity receiver side can not be submitted data to high level, retransmits the packet that VT (A) points to but constantly send STATUS PDU to the transmitter side requirement; And at transmitter side because VT (A) does not upgrade, can not confirm that data send successfully, and can constantly retransmit the packet that VT (A) points to that after retransmitting number of times and having surpassed the agreement predetermined restricted, the RLC entity can report upwards that repeating transmission fails to high level.High level can be thought Radio Link Failure and rebuild the RLC entity, when the RLC volume reconstruction, RLC entity receiver side can be reassembled as all bags except VT (A) in the receiver window RLC service data unit (RLC Service Data Unit, RLC SDU) and report high level.After the RLC volume reconstruction, the transmitter side high level can resend and not obtain the data confirmed.This just means that there is the RLC SDU of a lot (may be 511) success transmission in this, and meeting is transmission again after rebuilding, and has caused the serious waste of interface-free resources.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of data wireless links transmission method and wireless communication network node, to improve the efficiency of transmission of AM RLC entity.
The technical problem to be solved in the present invention is, a kind of data wireless links transmission method is provided, and under the Radio Link control RLC volume reconstruction situation, this method comprises:
After described RLC entity receives and rebuilds indication, service data unit SDU is sent successful affirmation information report high level;
Behind the described RLC volume reconstruction, the high-rise described confirmation that reports according to described RLC entity is determined the SDU that needs resend.
Further, described confirmation is that described RLC entity is determined according to the status protocol data cell STATUS PDU that reciprocity RLC entity sends.
Further, described confirmation comprises the sequence number SN of the SDU that confirms to send success but also do not report, and the SDU that described needs resend is the SDU that has confirmed that not success sends.
For solving the problems of the technologies described above, the invention provides a kind of data wireless links transmission method, under the Radio Link control RLC volume reconstruction situation, this method comprises:
After described RLC entity receives and rebuilds indication, the send state information of service data unit SDU is reported high level;
Behind the described RLC volume reconstruction, the high-rise described send state information that reports according to described RLC entity is determined the service data unit SDU that needs resend.
Further, described send state information is that described RLC entity is determined according to the status protocol data cell STATUS PDU that reciprocity RLC entity sends.
Further, described send state information comprises the sequence number SN that confirms to send success or do not send successful SDU, and the SDU that described needs resend is the SDU that has confirmed that not success sends.
Further, after described RLC entity received and rebuilds indication, the discontinuous data PDU that described RLC entity receiver side will receive was reassembled as SDU and submits to high level, and abandons remaining data PDU of receiver side and segmentation thereof; Described RLC entity transmitter side reports described send state information and abandons all PDU of transmitter side and SDU to described high level.
For solving the problems of the technologies described above, the present invention also provides a kind of wireless communication network node, and described wireless communication network node comprises interconnective high level and Radio Link control RLC entity, wherein,
Described RLC entity is used to transmit high level data, and receives reconstruction indication back reports send state information from service data unit SDU to described high level;
Described high level by RLC transmission data, and is used to receive described send state information, and behind the RLC volume reconstruction, determines that according to described send state information needs resend SDU.
Further, described RLC entity is an affirmation mode, comprise interconnective transmitter side part and receiver side part, described send state information is that described RLC entity transmitter side part is determined according to the status protocol data cell PDU that reciprocity RLC entity receiver side partly sends.
Further, described send state information comprises the sequence number SN that confirms to send success or do not send successful SDU, and the SDU that described needs resend is the SDU that has confirmed that not success sends.
Compared with prior art, the inventive method and the wireless communication network node AM RLC entity in the prior art scheme is built has increased reporting the send state information of SDU in the process.Like this in the data transmission procedure after rebuilding, when having kept the less advantage of original technology acknowledge message transmission, only can retransmit those and not confirm the data that successfully send, save and retransmitted the expense of successfully confirming data, improve the efficiency of transmission of AM RLC entity.
Description of drawings
Fig. 1 is existing AM RLC volume reconstruction process.
Fig. 2 is that existing AM RLC entity sends data success transmission notice to high-rise process.
Fig. 3 is a data wireless links transmission method schematic diagram of the present invention.
Process chart when Fig. 4 is an AM RLC volume reconstruction of the present invention.
Embodiment
Under the RLC volume reconstruction situation, data wireless links transmission method of the present invention as shown in Figure 3, comprising:
Step 301: after described RLC entity receives and rebuilds indication, rebuild the RLC entity and the send state information of service data unit SDU is reported high level;
Described send state information is that described RLC entity is definite according to the STATUSPDU (status protocol data cell) that reciprocity RLC entity sends, comprise and confirm to send success or do not send successful RLC service data unit (RLC Service Data Unit, RLC SDU) SN (SequenceNumber, sequence number), the RLC SDU that resends of described needs is the RLC SDU that has confirmed that success sends.
Step 302: behind the described RLC volume reconstruction, the high-rise described send state information that reports according to described RLC entity is determined the RLC SDU that needs resend.
The inventive method is only revised the part process of reconstruction and is eliminated the drawback that data have been confirmed in the repeating transmission after rebuilding of original scheme when the message that does not slacken former scheme is transmitted less advantage.
As shown in Figure 4, the data wireless links transmission method is based on the process of reconstruction of RLC AM entity in the prior art and improved, and the processing procedure of AM RLC entity specifically may further comprise the steps:
Step 401:AM RLC entity receives rebuilds indication;
The discontinuous RLC DataPDU that step 402:AM RLC entity receiver side will receive in the buffering area is reassembled as RLC SDU, and submits to high level by ascending order;
AM RLC entity receiver side takes out SN less than VR (MR) (highest received state from receive buffering area, Maximum Receive state variable,) and greater than VR (R) (accepting state variable, Receive state variable,) those RLC Data PDU, the complete RLC SDU that wherein comprises is restructured, in regrouping process, remove the head of RLC Data PDU;
AM RLC entity receiver side is submitted to high level with the RLC SDU that restructures, and the RLC SDU that these restructure may be discontinuous, so only need submit to high-rise getting final product to RLC SDU according to ascending order;
Step 403: abandon receiver side remaining RLC Data PDU and segmentation thereof;
Step 404: the service data unit SDU that the status PDU that transmitter side sends according to reciprocity AM RLC entity receiver side is determined sends successful affirmation information and reports high level, and confirmation comprises the SN of the RLC SDU that confirms successfully to send but also do not report;
Step 405: abandon all RLC PDU of transmitter side and RLC SDU;
Step 406: stop and all timers that reset;
Timer comprises the timer of AM RLC entity transmitter side and the timer of receiver side.
Step 407: all state variables that resets are their initial value.
State variable comprises all state variables of AM entity transmitter side and all state variables of AM entity receiver side, and they are reset to initial value.The state variable of AM RLC transmitter side comprises: VT (A), VT (MS), VT (S) etc.The state variable of AM RLC entity receiver side comprises: VR (R), VR (MS), VR (MR) etc.
In the above process, the processing of transmitter side and receiver side in no particular order.
After the RLC volume reconstruction, the transmitter side high level sends successful SDU sequence number according to confirming of sending of AM RLC entity and resends and do not obtain the RLC SDU that confirms.
Adopt the method for the invention, compared with prior art, when having kept the less advantage of original technology acknowledge message transmission, reached again and retransmitted the effect of successfully confirming data when eliminating the RLC volume reconstruction, saved and retransmitted the expense of successfully confirming data, improved the efficiency of transmission of AM RLC entity.
For realizing above method, the present invention also provides a kind of wireless communication network node, and described wireless communication network node comprises interconnective high level and Radio Link control RLC entity, wherein:
Described RLC entity is used to transmit high level data, and is receiving reconstruction indication back reports send state information from service data unit SDU to described high level;
Described RLC entity is an affirmation mode, comprise interconnective transmitter side part and receiver side part, described send state information is that described RLC entity transmitter side part is determined according to the STATUS PDU that reciprocity RLC entity receiver side partly feeds back, comprise the sequence number SN that confirms to send success or do not send successful SDU, the SDU that described needs resend is the SDU that has confirmed that not success sends.
Described RLC entity receiver side part is used to receive the PDU that reciprocity RLC entity sends and is kept at the reception buffering area, and the transmitter side by same entity is partly to reciprocity RLC entity transmit status PDU; When receiving high-rise reconstruction indication, the discontinuous PDU that also is used for receiving buffering area is reassembled as SDU and submits to high level by ascending order, and deletes remaining data PDU.
The transmitter side of described RLC entity part and receiver side part after receiving high-rise reconstruction indication, also are used to stop and resetting all timers and all state variables that reset are initial value.
Described high level by RLC transmission data, and is used to receive described send state information, and behind the RLC volume reconstruction, determines that according to described send state information needs resend SDU.
Wireless communication network node refers to portable terminal or base station.
Compared with prior art, the inventive method and the wireless communication network node AM RLC entity in the prior art scheme is built has increased reporting the transmission status information of service data unit SDU in the process. Like this in the data transmission procedure after rebuilding, when having kept the less advantage of original technology acknowledge message transmission, only can retransmit those and not confirm the data that successfully send, save and retransmitted the expense of successfully confirming data, improve the efficiency of transmission of AM RLC entity.
Claims (10)
1. a data wireless links transmission method is characterized in that, under the Radio Link control RLC volume reconstruction situation, this method comprises:
After described RLC entity receives and rebuilds indication, service data unit SDU is sent successful affirmation information report high level;
Behind the described RLC volume reconstruction, the high-rise described confirmation that reports according to described RLC entity is determined the SDU that needs resend.
2. the method for claim 1 is characterized in that: described confirmation is that described RLC entity is determined according to the status protocol data cell STATUS PDU that reciprocity RLC entity sends.
3. method as claimed in claim 1 or 2 is characterized in that: described confirmation comprises the sequence number SN of the SDU that confirms to send success but also do not report, and the SDU that described needs resend is the SDU that has confirmed that not success sends.
4. a data wireless links transmission method is characterized in that, under the Radio Link control RLC volume reconstruction situation, this method comprises:
After described RLC entity receives and rebuilds indication, the send state information of service data unit SDU is reported high level;
Behind the described RLC volume reconstruction, the high-rise described send state information that reports according to described RLC entity is determined the service data unit SDU that needs resend.
5. method as claimed in claim 4 is characterized in that: described send state information is that described RLC entity is determined according to the status protocol data cell STATUS PDU that reciprocity RLC entity sends.
6. as claim 4 or 5 described methods, it is characterized in that: described send state information comprises the sequence number SN that confirms to send success or do not send successful SDU, and the SDU that described needs resend is the SDU that has confirmed that not success sends.
7. method as claimed in claim 4, it is characterized in that: after described RLC entity receives and rebuilds indication, the discontinuous data PDU that described RLC entity receiver side will receive is reassembled as SDU and submits to high level, and abandons remaining data PDU of receiver side and segmentation thereof; Described RLC entity transmitter side reports described send state information and abandons all PDU of transmitter side and SDU to described high level.
8. wireless communication network node is characterized in that: described wireless communication network node comprises interconnective high level and Radio Link control RLC entity, wherein,
Described RLC entity is used to transmit high level data, and receives reconstruction indication back reports send state information from service data unit SDU to described high level;
Described high level by RLC transmission data, and is used to receive described send state information, and behind the RLC volume reconstruction, determines that according to described send state information needs resend SDU.
9. wireless communication network node as claimed in claim 8, it is characterized in that: described RLC entity is an affirmation mode, comprise interconnective transmitter side part and receiver side part, described send state information is that described RLC entity transmitter side part is determined according to the status protocol data cell PDU that reciprocity RLC entity receiver side partly sends.
10. wireless communication network node as claimed in claim 8 or 9, it is characterized in that: described send state information comprises the sequence number SN that confirms to send success or do not send successful SDU, and the SDU that described needs resend is the SDU that has confirmed that not success sends.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102037635A CN101924621A (en) | 2009-06-12 | 2009-06-12 | Method for data transmission of wireless link and wireless communication network node |
| PCT/CN2009/075908 WO2010142122A1 (en) | 2009-06-12 | 2009-12-23 | Radio link data transmission method and radio communication network node |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102037635A CN101924621A (en) | 2009-06-12 | 2009-06-12 | Method for data transmission of wireless link and wireless communication network node |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104272851A (en) * | 2012-05-07 | 2015-01-07 | 高通股份有限公司 | System and method for peer-to-peer connection reestablishment |
| WO2015123883A1 (en) * | 2014-02-24 | 2015-08-27 | Qualcomm Incorporated | Radio link control entity re-establishment |
| WO2019096215A1 (en) * | 2017-11-16 | 2019-05-23 | 夏普株式会社 | Wireless communication method and device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103108404B (en) * | 2011-11-14 | 2018-07-24 | 南京中兴新软件有限责任公司 | service establishing method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5826198A (en) * | 1992-01-13 | 1998-10-20 | Microcom Systems, Inc. | Transmission of data over a radio frequency channel |
| DE602004031676D1 (en) * | 2004-05-07 | 2011-04-14 | Ericsson Telefon Ab L M | CONSTRUCT LOSS-FREE RADIO CONTROL (RLC) AVOIDING DUPLICATION OF SERVICE DATA UNIT (SDU) |
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- 2009-06-12 CN CN2009102037635A patent/CN101924621A/en active Pending
- 2009-12-23 WO PCT/CN2009/075908 patent/WO2010142122A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104272851A (en) * | 2012-05-07 | 2015-01-07 | 高通股份有限公司 | System and method for peer-to-peer connection reestablishment |
| CN104272851B (en) * | 2012-05-07 | 2018-11-02 | 高通股份有限公司 | The system and method rebuild for peer to peer connection |
| WO2015123883A1 (en) * | 2014-02-24 | 2015-08-27 | Qualcomm Incorporated | Radio link control entity re-establishment |
| WO2019096215A1 (en) * | 2017-11-16 | 2019-05-23 | 夏普株式会社 | Wireless communication method and device |
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| WO2010142122A1 (en) | 2010-12-16 |
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Application publication date: 20101222 |