CN102377547A - Data retransmission method and data retransmission system in multi-carrier system - Google Patents
Data retransmission method and data retransmission system in multi-carrier system Download PDFInfo
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- CN102377547A CN102377547A CN2010102546248A CN201010254624A CN102377547A CN 102377547 A CN102377547 A CN 102377547A CN 2010102546248 A CN2010102546248 A CN 2010102546248A CN 201010254624 A CN201010254624 A CN 201010254624A CN 102377547 A CN102377547 A CN 102377547A
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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
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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
Abstract
The invention discloses a data retransmission method and a data retransmission system in a multi-carrier system. The data retransmission method comprises the following steps of: if a terminal detects that the received segmentation and reassembly (SAR) serial numbers of a data packet are discontinuous, informing a base station controller of a SAR serial number required to be retransmitted; and after the base station controller receives the SAR serial number required to be retransmitted which is informed by the terminal, retransmitting data of the corresponding serial number to the terminal. By adopting the method disclosed by the invention, the retransmission can be quickly initialized. In addition, under the condition that the quality of a certain link port is poor, a link having a port with better quality can be selected, the required data are retransmitted on the link and the retransmission stability is improved, and thereby the failure rate of retransmission can be effectively reduced.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to data repeating method and system in a kind of multicarrier system.
Background technology
Based on CDMA (Code Division Multiple Access; Code division multiple access) EVDO (Evolution Data Only; The CDMA2000 data transfer protocol) in the RevB wireless communication system; BSC (Base Station Controller, base station controller) can send the data to the terminal through a plurality of link flow.A Traffic Channel unit in the corresponding driving of each link flow; Each Traffic Channel unit has stream and the transmit queue of oneself; Comprise transmit queue first; RLP (Radio Link Protocol, radio link protocol) retransmission queue and DARQ (Delayed Automatic Repeat Request, the automatic repeat requests of delay) formation.BSC is according to the flow control algorithm of each business unit, and the media stream data of forward direction through scheduler, is mail to the software queue of each business unit, through eating dishes without rice or wine, sends to the terminal then.In the REVA system, owing to be that a link is sending the forward medium flow data to the terminal all the time, therefore, the terminal only need judge whether RLP layer sequence number be just passable continuously.
But in the REVB system; The forward medium flow data that the terminal receives maybe be from different link flow, and the continuity of depending RLP layer sequence number alone just can't judge whether packet loss, therefore; BSC and driving provide SAR (Segmentation And Reassembly; Segmentation and Reassembly) sequence number and QN (Quick NACK, negative response fast) sequence number is used for the terminal judgement.The effect of SAR sequence number is similar to the RLP sequence number in the REVA system in the REVB system, distributes in the BSC side.The QN sequence number is provided by driving, and the QN sequence number of each link is continuous, but the SAR sequence number possibly be discontinuous.
Fig. 1 receives the sketch map of SAR and QN sequence number packet for terminal in the multicarrier system.As shown in Figure 1, SAR sequence number that the BSC side has been allocation of packets is by 100 to 499.These packets send to the terminal through 2 links, are respectively QN1 and QN2.On the QN1 link, the SAR sequence number is respectively 100-149 (QNSeq#1), 200-299 (QNSeq#2) and 350-399 (QNSeq#3).The terminal is if find that the QN sequence number of packet is discontinuous, promptly receive the 100-149 packet after, receive the 350-399 packet again, then judge to have packet loss, require the BSC side to initiate to retransmit.If the SAR sequence number of the packet that the terminal receives is discontinuous, can not judge whether there is packet loss at once.Because the performance of two link flow maybe be uneven, if the QN1 link is better than the QN2 link, at this moment, the terminal possibly received 100-149 earlier, the 200-299 packet, and temporarily can't receive the 150-199 packet.Then the terminal will start a retransmission timer, and behind timer expiry, notice BSC retransmits.But there is certain defective in present this retransmission scheme, and is second-rate if the QN2 link is eated dishes without rice or wine, and then can't receive the packet of re-transmission probably, causes packet loss.
Summary of the invention
The technical problem that the present invention solves provides data repeating method and system in a kind of multicarrier system, can initiate fast to retransmit.
For solving the problems of the technologies described above, the invention provides data repeating method in a kind of multicarrier system, said method comprises:
If it is discontinuous that the terminal detects Segmentation and Reassembly (SAR) sequence number of the packet that receives, the SAR sequence number informing base station controller that then will retransmit;
Base station controller is given said terminal with the data re-transmission of corresponding sequence number after receiving the SAR sequence number of the needs re-transmission of notifying at said terminal.
Further, when said base station controller was received the SAR sequence number of the needs re-transmission of notifying at said terminal, the measured transmission link of matter of selecting to eat dishes without rice or wine was given said terminal with the data re-transmission of corresponding sequence number.
Further, said base station controller is according to the following mode measured link of matter of selecting to eat dishes without rice or wine:
The terminal safeguards a transmission factor and reports said base station controller for each transmission link, and wherein, the transmission factor of each transmission link comprises terminal number or flow size from the data that receive of this transmission link in some cycles;
Said base station controller selects the maximum or bigger transmission link of transmission factor as eating dishes without rice or wine the measured transmission link of matter according to the transmission factor of each transmission link of said terminal to report.
Further, said method also comprises:
The terminal is discontinuous if detect quick response (QN) sequence number of the packet that receives, and then the informing base station controller retransmits.
Further, said terminal when the SAR sequence number informing base station controller that will retransmit, or periodically report said transmission factor to said base station controller.
The present invention also provides data re-transmission system in a kind of multicarrier system, and said system comprises data detection module and the data re-transmission module in the base station controller in the terminal, wherein:
Said data detection module, whether Segmentation and Reassembly (SAR) sequence number that is used to detect the packet that receives is continuous, if discontinuous, the SAR sequence number informing base station controller that then will retransmit;
Said data re-transmission module, be used to receive the SAR sequence number that the needs of terminal notice retransmit after, give said terminal with the data re-transmission of corresponding sequence number.
In addition, said data re-transmission module is further used for, and when receiving the SAR sequence number of the needs re-transmission of notifying at said terminal, the measured transmission link of matter of selecting to eat dishes without rice or wine is given said terminal with the data re-transmission of corresponding sequence number.
In addition, said system also comprises the transmission factor statistical report module in the terminal, wherein:
Said transmission factor statistical report module is used for; For each transmission link is safeguarded a transmission factor and is reported said base station controller; Wherein, the transmission factor of each transmission link comprises terminal number or flow size from the data that receive of this transmission link in some cycles;
Said data re-transmission module is further used for, and according to the transmission factor of each transmission link of said terminal to report, selects the maximum or bigger transmission link of transmission factor as eating dishes without rice or wine the measured transmission link of matter.
In addition, said data detection module also is used for, and is discontinuous as if the QN sequence number that detects the packet that receives, then the informing base station controller;
Said data re-transmission module also is used for, and according to the discontinuous notice of said QN sequence number, the packet at said terminal is retransmitted.
In addition, said transmission factor statistical report module is further used for, when the SAR sequence number informing base station controller that will retransmit, or periodically report said transmission factor to said base station controller.
Among the present invention, sequence number is discontinuous as long as the terminal detects SAR, does not then restart retransmission timer, but notifies BSC to retransmit immediately.Adopt method of the present invention, can initiate fast to retransmit, and needn't waiting timer overtime.In addition, eat dishes without rice or wine under the not good situation of quality for certain link, the quality link preferably of eating dishes without rice or wine can be selected in the terminal, and the data that re-transmission above that needs improve the stability that retransmits, thereby can reduce the mortality of re-transmission effectively.
Description of drawings
Fig. 1 receives the sketch map of the packet of SAR and QN sequence number for terminal in the multicarrier system;
Fig. 2 is the schematic flow sheet of data repeating method in the multicarrier system of the embodiment of the invention.
Embodiment
Basic ideas of the present invention are, through the quick re-transmission policy of a kind of " initiatively ", reduce the mortality that retransmits, and its core content comprises: when the terminal detects the QN sequence number when discontinuous, initiate immediately to retransmit; When detecting the SAR sequence number when discontinuous; The SAR sequence number notice BSC that will retransmit immediately; In addition, for fear of the re-transmission failure that reasons such as quality is not good cause of eating dishes without rice or wine of certain link, quality link data retransmission preferably can be selected in the terminal; Retransmit failed probability thereby reduce, improve the success rate of data re-transmission.
Based on above-mentioned thinking, the present invention provides data repeating method in a kind of multicarrier system, specifically adopts following technical scheme:
If it is discontinuous that the terminal detects the SAR sequence number of the packet that receives, the SAR sequence number notice BSC that then will retransmit;
When BSC receives the SAR sequence number of the needs re-transmission of notifying at said terminal, give said terminal with the data re-transmission of corresponding sequence number.
Further, when said BSC received the SAR sequence number of the needs re-transmission of notifying at said terminal, the measured transmission link of matter of selecting to eat dishes without rice or wine was given said terminal with the data re-transmission of corresponding sequence number.
Further, said BSC is according to the following mode measured link of matter of selecting to eat dishes without rice or wine:
The terminal is safeguarded a transmission factor and is reported said BSC for each transmission link; Wherein, The transmission factor of each transmission link comprises terminal proportion from the data that receive of this transmission link in some cycles or preset time section, receives the number or the flow size of packet like link in certain time period;
Said BSC selects to eat dishes without rice or wine the measured transmission link of matter according to the transmission factor of each transmission link of said terminal to report, the maximum or bigger transmission link like transmission factor.
In general, this transmission factor is big more, represent that then the packet of receiving from this link is many more, and the quality of eating dishes without rice or wine of this link is also better relatively.
Further, said method also comprises:
The terminal is discontinuous if detect the QN sequence number of the packet that receives, and then notifies BSC to retransmit.
To combine accompanying drawing and specific embodiment that the enforcement of technical scheme of the present invention is done further to describe in detail below.
Data retransmission method mainly may further comprise the steps in the multicarrier system of the embodiment of the invention:
Wherein, terminal statistics transmission factor can be a periodic statistics, for example per half a minute or the number or the flow size of adding up the packet of receiving on each transmission link in one minute.When the transmission factor with statistics reports BSC, both can be to have added up immediately just to report, also can be when notice BSC retransmits, just to report.
In addition, between this step 2 and the step 1, promptly QN sequence number and SAR sequence number are discontinuous does not have certain sequencing.
Step 4, the terminal is reported to application layer if receive the packet of repeating transmission after assembling; Then directly abandon repeating data if receive.
To be example with the EVDO REVB based on the CDMA standard below, the data repeating method to the SAR sequence number of the embodiment of the invention when discontinuous be elaborated.
Suppose that the terminal receives data from two different link flow, is respectively QN1 and QN2.The BSC side has been distributed the SAR sequence number, and from 100 to 449, issue the terminal by two links.As shown in Figure 2, this flow process specifically may further comprise the steps:
Correspondingly, the present invention also provides data re-transmission system (not shown) in a kind of multicarrier system, and said system comprises data detection module and the data re-transmission module in the base station controller in the terminal, wherein:
Said data detection module, whether Segmentation and Reassembly (SAR) sequence number that is used to detect the packet that receives is continuous, if discontinuous, the SAR sequence number informing base station controller that then will retransmit;
Said data re-transmission module, be used to receive the SAR sequence number that the needs of terminal notice retransmit after, give said terminal with the data re-transmission of corresponding sequence number.
In addition, said data re-transmission module is further used for, and when receiving the SAR sequence number of the needs re-transmission of notifying at said terminal, the measured transmission link of matter of selecting to eat dishes without rice or wine is given said terminal with the data re-transmission of corresponding sequence number.
In addition, said system also comprises the transmission factor statistical report module in the terminal, wherein:
Said transmission factor statistical report module is used for; For each transmission link is safeguarded a transmission factor and is reported said base station controller; Wherein, the transmission factor of each transmission link comprises terminal number or flow size from the data that receive of this transmission link in some cycles;
Said data re-transmission module is further used for, and according to the transmission factor of each transmission link of said terminal to report, selects the maximum or bigger transmission link of transmission factor as eating dishes without rice or wine the measured transmission link of matter.
In addition, said data detection module also is used for, and is discontinuous as if the QN sequence number that detects the packet that receives, then the informing base station controller;
Said data re-transmission module also is used for, and according to the discontinuous notice of said QN sequence number, the packet at said terminal is retransmitted.
In addition, said transmission factor statistical report module is further used for, when the SAR sequence number informing base station controller that will retransmit, or periodically report said transmission factor to said base station controller.
More than be merely preferred case study on implementation of the present invention; Be not limited to the present invention; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof, those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (10)
1. data repeating method in the multicarrier system is characterized in that said method comprises:
If it is discontinuous that the terminal detects Segmentation and Reassembly (SAR) sequence number of the packet that receives, the SAR sequence number informing base station controller that then will retransmit;
Base station controller is given said terminal with the data re-transmission of corresponding sequence number after receiving the SAR sequence number of the needs re-transmission of notifying at said terminal.
2. the method for claim 1 is characterized in that,
When said base station controller was received the SAR sequence number of the needs re-transmission of notifying at said terminal, the measured transmission link of matter of selecting to eat dishes without rice or wine was given said terminal with the data re-transmission of corresponding sequence number.
3. method as claimed in claim 2 is characterized in that, said base station controller is according to the following mode measured link of matter of selecting to eat dishes without rice or wine:
The terminal safeguards a transmission factor and reports said base station controller for each transmission link, and wherein, the transmission factor of each transmission link comprises terminal number or flow size from the data that receive of this transmission link in some cycles;
Said base station controller selects the maximum or bigger transmission link of transmission factor as eating dishes without rice or wine the measured transmission link of matter according to the transmission factor of each transmission link of said terminal to report.
4. like claim 1,2 or 3 described methods, it is characterized in that said method also comprises:
The terminal is discontinuous if detect quick negative response (QN) sequence number of the packet that receives, and then the informing base station controller retransmits.
5. method as claimed in claim 3 is characterized in that,
Said terminal when the SAR sequence number informing base station controller that will retransmit, or periodically report said transmission factor to said base station controller.
6. data re-transmission system in the multicarrier system is characterized in that, said system comprises data detection module and the data re-transmission module in the base station controller in the terminal, wherein:
Said data detection module, whether Segmentation and Reassembly (SAR) sequence number that is used to detect the packet that receives is continuous, if discontinuous, the SAR sequence number informing base station controller that then will retransmit;
Said data re-transmission module, be used to receive the SAR sequence number that the needs of terminal notice retransmit after, give said terminal with the data re-transmission of corresponding sequence number.
7. system as claimed in claim 6 is characterized in that,
Said data re-transmission module is further used for, and when receiving the SAR sequence number of the needs re-transmission of notifying at said terminal, the measured transmission link of matter of selecting to eat dishes without rice or wine is given said terminal with the data re-transmission of corresponding sequence number.
8. system as claimed in claim 7 is characterized in that, said system also comprises the transmission factor statistical report module in the terminal, wherein:
Said transmission factor statistical report module is used for; For each transmission link is safeguarded a transmission factor and is reported said base station controller; Wherein, the transmission factor of each transmission link comprises terminal number or flow size from the data that receive of this transmission link in some cycles;
Said data re-transmission module is further used for, and according to the transmission factor of each transmission link of said terminal to report, selects the maximum or bigger transmission link of transmission factor as eating dishes without rice or wine the measured transmission link of matter.
9. like claim 6,7 or 8 described systems, it is characterized in that,
Said data detection module also is used for, and is discontinuous as if the QN sequence number that detects the packet that receives, then the informing base station controller;
Said data re-transmission module also is used for, and according to the discontinuous notice of said QN sequence number, the packet at said terminal is retransmitted.
10. system as claimed in claim 8 is characterized in that,
Said transmission factor statistical report module is further used for, when the SAR sequence number informing base station controller that will retransmit, or periodically report said transmission factor to said base station controller.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102546248A CN102377547A (en) | 2010-08-10 | 2010-08-10 | Data retransmission method and data retransmission system in multi-carrier system |
| PCT/CN2011/073831 WO2012019469A1 (en) | 2010-08-10 | 2011-05-09 | Data retransmission method and system in multi-carrier system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102546248A CN102377547A (en) | 2010-08-10 | 2010-08-10 | Data retransmission method and data retransmission system in multi-carrier system |
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| CN102377547A true CN102377547A (en) | 2012-03-14 |
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| WO2015120698A1 (en) * | 2014-02-17 | 2015-08-20 | 中兴通讯股份有限公司 | Method and device for reducing number of ue releases, and base station |
| WO2018171775A1 (en) * | 2017-03-24 | 2018-09-27 | 中国移动通信有限公司研究院 | Method of multi-link retransmission under multiple connections, base station and storage medium |
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| WO2015120698A1 (en) * | 2014-02-17 | 2015-08-20 | 中兴通讯股份有限公司 | Method and device for reducing number of ue releases, and base station |
| WO2018171775A1 (en) * | 2017-03-24 | 2018-09-27 | 中国移动通信有限公司研究院 | Method of multi-link retransmission under multiple connections, base station and storage medium |
| CN108631961A (en) * | 2017-03-24 | 2018-10-09 | 中国移动通信有限公司研究院 | The method and base station that multilink retransmits are realized under a kind of multi-connection |
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| WO2012019469A1 (en) | 2012-02-16 |
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Application publication date: 20120314 |