CN1859070A - Repeating method for data based on error feedback mechanism and relative system - Google Patents
Repeating method for data based on error feedback mechanism and relative system Download PDFInfo
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- CN1859070A CN1859070A CN 200510036790 CN200510036790A CN1859070A CN 1859070 A CN1859070 A CN 1859070A CN 200510036790 CN200510036790 CN 200510036790 CN 200510036790 A CN200510036790 A CN 200510036790A CN 1859070 A CN1859070 A CN 1859070A
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Abstract
This invention discloses a data re-transmission method based on an error feed-back system including: a radio access terminal tests to decide the carrier link of the possible lost data packet and determines the serial number sphere of the first data packet subordinating to the lost data packet based on the serial number of the first data packet of the received data packet to transmit the identification information of the carrier link of the lost data packet and the number sphere of the first data packet to the network side, which decides the packet necessary to be re-transmitted based on the information to transmit it. This invention also discloses a related system.
Description
Technical field
The present invention relates to the wireless network communication technical field, be specifically related to a kind of data repeating method and corresponding system based on error feedback mechanism.
Background technology
At present, the 3G mobile communication technology is ripe gradually commercial, 3GPP2 (3G (Third Generation) Moblie collaborative project tissue 2) CDMA2000 1XEV-DO (Evolution, evolution, Data Only only supports Packet data service) competitive wireless access system can further be provided in the coming years.
The 1XEV-DO technology is a kind of technology that is used for the transmitting high speed Packet data service, and the peak-peak speed of every sector carrier frequency support can reach 2.4Mbps, and in version A, peak rate can reach 3.1Mbps.But, want to keep following 10 years or the competitiveness in decades, need to introduce new wireless access technology.
At present, industry is reached preliminary unanimity with regard to the technology of the eating dishes without rice or wine evolution of 3GPP2, the technology of the eating dishes without rice or wine evolution that is about to 3GPP2 is divided into 2 stages and carries out, stage one, employing multi-carrier DO technology, do not change under the situation of physical layer in the assurance of trying one's best,, obtain higher peak value digit rate by the upper layer software (applications) upgrading, guarantee backward compatibility, the deadline of this standard roughly was the end of the year 2005; Stage two, the more advanced new technology of introducing are the long-term evolution plans of 3GPP2.
RLP (Radio Link Protocol radio link protocol) guarantees the grouped data link layer protocol of transmission as possible in the 1XEV-DO system, it can provide more reliable transfer of data for upper strata such as TCP layer, thereby the error burst that the shielding wireless side is brought disturbs.
RLP is a kind of agreement that error detection and data re-transmission are provided based on NAK (error feedback).When data receiver detects data-bag lost is arranged in the transmission course, then can retransmit the packet of losing by NAK control messages request msg transmitting terminal.Data sending terminal carries out data re-transmission according to the first byte sequence number of the obliterated data that carries in the NAK control messages and the length of obliterated data.
In multi-carrier DO system, may exist many forward carriers channels to carry out the phenomenon of data packet transmission simultaneously, so, need make amendment to RLP, to guarantee the validity and the reliability of Data Receiving.
At present, as shown in Figure 1 based on the implementation method schematic diagram of the data re-transmission of single RLP (single-RLP) example.
Among Fig. 1, network side is safeguarded single RLP example, the RLP example is packed the upper-layer packet data, and be responsible for assigning the SAR_Seq sequence number continuous for each RLP, then, the RLP bag that will have continuous SAR_Seq sequence number is assigned on the different carrier links according to dispatching algorithm and sends the ARQ_Seq sequence number that each carrier link is responsible for assigning continuous to the RLP that transmits on it.
The wireless access terminal detects according to the continuity of the ARQ_Seq sequence number of each RLP bag whether wrong frame produces on this carrier link, the RLP bag that the SAR_Seq sequence number of RLP bag then is used for receiving on a plurality of carrier links is resequenced, and handles so that be submitted to the upper strata.
If it is discontinuous that the wireless access terminal detects on certain carrier link the ARQ_Seq sequence number, illustrate that then wrong frame produces on this carrier link, the wireless access terminal need resend by the RLP bag of mistake frame by NAK control messages request network side.
Below by two concrete examples present data repeating method based on error feedback mechanism is elaborated.
The SAR_Seq sequence number and the ARQ_Seq sequence number of the RLP bag that example 1, wireless access terminal receive from carrier link 1 and carrier link 2 respectively are as follows:
<ARQ_Seq，SAR_Seq> <ARQ_Seq，SAR_Seq>
＜1,5〉--correct reception＜1,6〉--the correct reception
＜2,8〉--also confiscate
＜3,9〉--correct reception＜3,10〉--also confiscate
The ARQ_Seq sequence number of the RLP bag that the wireless access terminal receives from carrier link 1 is respectively 1,3, and the ARQ_Seq sequence number of the RLP bag that the wireless access terminal receives from carrier link 2 is 1; Because the ARQ_Seq sequence number of RLP bag is discontinuous in the carrier link 1,, need the request network side to retransmit this RLP bag so the wireless access terminal detects wrong frame and produces.
The SAR_Seq sequence number of the RLP bag lost need further be determined in the wireless access terminal after defining the RLP bag that need to retransmit, at present, the wireless access terminal determines that the method for the SAR_Seq sequence number of the RLP bag lost is:
The wireless access terminal determines that the SAR_Seq sequence number of its RLP that receives at last from two carrier links bag is respectively 6 and 9, so, the SAR_Seq sequence number of the RLP bag that the wireless access terminal is determined to lose is 7 and 8, though the SAR_Seq sequence number is that 8 RLP bag also may aloft transmit.
The wireless access terminal is after the SAR_Seq sequence number of the RLP bag of determining to lose, assembling NAK control messages also sends it to network side, the information that needs in the NAK control messages to comprise is: the SAR_Seq sequence number 7 and 8 of the RLP bag of losing, the SAR_Seq sequence number 6 of last RLP bag that the SAR_Seq sequence number 9 of last 1 RLP bag that the wireless access terminal receives on carrier link 1, wireless access terminal receive on carrier link 2.
After network side receives the NAK control messages, determine according to the tabulation of self maintained the RLP bag of losing sends on which carrier link, as determining that the SAR_Seq sequence number is RLP bag transmission on carrier link 1 of 7, the SAR_Seq sequence number is RLP bag transmission on carrier link 2 of 8, the SAR_Seq sequence number 9 that last 1 RLP that network side receives on carrier link 1 according to the wireless access terminal that provides in the NAK control messages wraps, can determine the SAR_Seq sequence number be 7 RLP bag by the mistake frame, need retransmit; The SAR_Seq sequence number 6 of last 1 RLP bag that network side receives on carrier link 2 according to the wireless access terminal that provides in the NAK control messages can determine that the SAR_Seq sequence number is that 8 RLP bag does not also receive, and by the mistake frame, does not need to retransmit.
Network side is that 7 RLP bag transfers to the wireless access terminal again with the SAR_Seq sequence number behind the RLP bag that determine to need retransmits, thereby solved in the multi-carrier DO system problem based on RLP forward data stable transfer.
The SAR_Seq sequence number and the ARQ_Seq sequence number of the RLP bag that example 2, wireless access terminal receive from carrier link 1 and carrier link 2 are as follows:
<ARQ_Seq，SAR_Seq> <ARQ_Seq，SAR_Seq>
＜1,5〉--correct reception＜1,6〉--the correct reception
＜2,7〉--the correct reception
＜3,8〉--the correct reception
＜2,10〉--the correct reception
＜5,11〉--correct reception＜3,12〉--also confiscate
The ARQ_Seq sequence number of the RLP bag that the wireless access terminal receives from carrier link 1 is respectively 1,2,3,5, and the ARQ_Seq sequence number of the RLP bag that the wireless access terminal receives from carrier link 2 is 1,2,3; Because the ARQ_Seq sequence number of RLP bag is discontinuous in the carrier link 1,, need the request network side to retransmit this RLP bag so the wireless access terminal detects wrong frame and produces.
The SAR_Seq sequence number of the RLP bag lost need further be determined in the wireless access terminal after defining the RLP bag that need to retransmit.The wireless access terminal determines that respectively the SAR_Seq sequence number of the RLP bag that it receives from two carrier links at last is respectively 10 and 11, and the SAR_Seq sequence number to be 8 RLP bag correctly received, so, the SAR_Seq sequence number 9 of the RLP bag that the wireless access terminal is determined to lose.
The wireless access terminal is after the SAR_Seq sequence number of the RLP bag of determining to lose, assembling NAK control messages also sends it to network side, the information that needs in the NAK control messages to comprise is: the SAR_Seq sequence number 9 of the RLP bag of losing, the SAR_Seq sequence number 10 of last RLP bag that the SAR_Seq sequence number 11 of last 1 RLP bag that the wireless access terminal receives on carrier link 1, wireless access terminal receive on carrier link 2.
After network side receives the NAK control messages, determine according to the tabulation of self maintained the RLP bag of losing sends on which carrier link, as determining that the SAR_Seq sequence number is RLP bag transmission on carrier link 1 of 9, the SAR_Seq sequence number 11 that last 1 RLP that network side receives on carrier link 1 according to the wireless access terminal that provides in the NAK control messages wraps, can determine the SAR_Seq sequence number be 9 RLP bag by the mistake frame, need retransmit.
Network side is that 9 RLP bag transfers to the wireless access terminal again with the SAR_Seq sequence number behind the RLP bag that determine to need retransmits, thereby solved in the multi-carrier DO system problem based on RLP forward data stable transfer.
From as can be known above-mentioned, in the existing data repeating method based on error feedback mechanism, the NAK message that the wireless access terminal equipment side transmits is simplified inadequately.Last RLP sequence number with each link in the message all reports, and the length of RLP sequence number is generally all longer, and long NAK control messages will reduce the efficient of valid data transmission, reduces data throughout.
In addition, the NAK message of wireless access terminal side does not comprise the link information that needs retransmit, and after network side is received NAK, needs all records of traversal need could determine the byte of re-transmission.
Summary of the invention
The technical problem that the present invention solves provides a kind of data repeating method and corresponding system based on error feedback mechanism, to improve the efficient of valid data transmission, improves data throughout.
For addressing the above problem, the data repeating method based on error feedback mechanism of the present invention, all packets that transmit on each carrier link for the wireless access terminal are specified has the successional first packet sequence number, and this method comprises:
The carrier link of determining the possibility lost data packets is detected in a, wireless access terminal;
The first packet sequence number scope that lost data packets is affiliated is determined according to the first packet sequence number of each packet that has received in b, wireless access terminal;
C, wireless access terminal are sent to network side with the identification information of the carrier link of described lost data packets and the first packet sequence number scope under the described lost data packets;
D, network side are determined the lost data packets that needs retransmit according to the carrier link identification information and the first packet sequence number scope under the described lost data packets of described lost data packets, and described lost data packets is retransmitted.
Wherein, have the successional second packet sequence number for data packets for transmission on each carrier link that is assigned to the wireless access terminal specifies on its affiliated carrier link in the described multicarrier system, detect the carrier link of determining lost data packets among the step a and specifically comprise:
It is discontinuous that the wireless access terminal detects the second packet sequence number of each packet that transmits on the carrier link, determines that then the discontinuous carrier link of the described second packet sequence number is the carrier link of lost data packets.
Wherein, step b determines that the first packet sequence number scope of the packet lost is a continuous serial number range, and step c specifically comprises:
The wireless access terminal is at error feedback control messages of this first continuous packet sequence number scope structure, is packaged with the identification information of carrier link at this first packet sequence number scope, lost data packets place and the carrier link number of lost data packets in the described error feedback control messages;
Described error feedback control messages is transferred to network side, the packet of request network side retransmission of lost.
Wherein, the first packet sequence number scope that step b determines is an a plurality of continuous serial number range at interval, and step c specifically comprises:
The error feedback control messages of corresponding number is constructed at the described first packet scope a plurality of continuous serial number range at interval in the wireless access terminal, is packaged with the identification information of carrier link at the first corresponding packet sequence number scope, lost data packets place and the carrier link number of lost data packets in each error feedback control messages;
Described a plurality of error feedback control messages are transferred to network side, the packet of request network side retransmission of lost.
Wherein, determine that according to the carrier link identification information of described lost data packets and the first packet sequence number scope under the described lost data packets lost data packets that needs carry out data re-transmission comprises in the steps d:
Network side is inquired about data packets for transmission transmission tabulation on this carrier link according to the carrier link identification information of lost data packets;
Determine that it is the lost data packets that need carry out data re-transmission that described packet sends the packet that belongs to the described first packet sequence number scope in the tabulation.
Wherein, report the data packet transmission healing of error feedback control information to the first packet sequence number scope of the lost data packets of its feedback of acquiescence behind the network side.
Wherein, described carrier link identification information is forward link sequence number FL_ID.
Wherein, described error feedback mechanism is: based on the error feedback mechanism of default grouping application or based on the error feedback mechanism of default multithread grouping or based on the error feedback mechanism that strengthens the multithread grouping.
Correspondingly, the present invention is based on the data re-transmission system of error feedback mechanism, comprising:
Repeat requests end: be arranged on the wireless access terminal, be used to detect the carrier link of determining lost data packets, and determine the first packet sequence number scope under the described lost data packets according to the first packet sequence number of each packet that has received; Then the identification information of the carrier link of described lost data packets and the first packet sequence number scope under the described lost data packets are sent to network side;
Data re-transmission end: be arranged on network side, determine the lost data packets that needs retransmit, described lost data packets is retransmitted according to the carrier link identification information and the first packet sequence number scope under the described lost data packets of described lost data packets.
Wherein, have the successional second packet sequence number for data packets for transmission on each carrier link that is assigned to the wireless access terminal specifies on its affiliated carrier link in the described multicarrier system, described repeat requests end comprises:
The carrier link of lost data packets detects determines device, whether continuous, and determine that the discontinuous carrier link of the described second packet sequence number is the carrier link of lost data packets detecting on the carrier link the discontinuous back of the data packets for transmission second packet sequence number if being used on the detected carrier link the second packet sequence number of data packets for transmission;
Error feedback control messages apparatus for assembling is used for the wireless access terminal identification information of the carrier link at the first packet sequence number scope under the described lost data packets, lost data packets place and the carrier link number of lost data packets is assembled into the error feedback control messages;
The message dispensing device is used for described error feedback control messages is transferred to network side, the packet of request network side retransmission of lost;
Described data re-transmission end comprises:
The lost data packets inquiry unit is inquired about data packets for transmission transmission tabulation on this carrier link according to the carrier link identification information of lost data packets; And determine that it is the lost data packets that need carry out data re-transmission that described packet sends the packet that belongs to the described first packet sequence number scope in the tabulation;
Retransmit dispensing device, be used for the lost data packets that described definite needs carry out data re-transmission is sent.
Compared with prior art, the present invention has following beneficial effect:
At first, only the identification information of the carrier link of lost data packets and the first packet sequence number scope under the lost data packets are encapsulated in the error feedback NAK message among the present invention and are sent to network side, the NAK message of having simplified the wireless access terminal side transmits content, owing to do not need the information of all carrier links is reported, only reporting needs the carrier link of transmission information, can save a lot of message-lengths, special under the more situation of forward carriers number, this improvement meeting is more obvious.
Secondly, since the length of carrier link sequence number usually also less than the length of RLP sequence number.Like this, the NAK message-length reduces, and will reduce the transport overhead loss, also increases simultaneously to receive possibility of success.
Secondly, comprise in the NAK message that the wireless access terminal side sends among the present invention and need the carrier link of transmission information, after network side is received NAK message, do not need to travel through all records, as long as find the data of this carrier link to send the packet that tabulation just need can determine re-transmission, can improve the network side treatment effect.
Description of drawings
Fig. 1 is the realization schematic diagram of the data re-transmission based on error feedback mechanism of the prior art;
Fig. 2 is based on the data repeating method flow chart of error feedback mechanism in the multi-carrier DO system of the present invention;
Fig. 3 is based on the data re-transmission system schematic of error feedback mechanism in the multi-carrier DO system of the present invention.
Embodiment
The present invention can be applicable in the multi-carrier DO system based on error feedback mechanism, have the successional first packet sequence number (being the described SAR_Seq sequence number of background) and have the successional second packet sequence number (being the described ARQ_Seq sequence number of background) for data packets for transmission on each carrier link that is assigned to the wireless access terminal specifies on its affiliated carrier link for all packets appointments of transmitting on each carrier link of wireless access terminal in the described multi-carrier DO system, described error feedback mechanism can be the error feedback mechanism of using based on default grouping, or based on the error feedback mechanism of default multithread grouping, or based on the error feedback mechanism that strengthens the multithread grouping.
With reference to figure 2, this figure be in the multi-carrier DO system of the present invention based on the data repeating method flow chart of error feedback mechanism, mainly may further comprise the steps:
Describe with specific embodiment below.
The identification information of carrier link described in the present invention is forward link sequence number FL_ID.Forward link sequence number FL_ID, promptly the forward link that is distributed in TCA (TrafficChannelAssignment) the transmission channel assignment message is by the pairing sequence number of the incremental order of its place frequency.Because forward link is no more than 15 in the multi-carrier DO system at present, so the scope of FL_ID is 0 to 14, can distribute 4 bits.
Describe with the handling process of wireless access terminal side and network side respectively below.
Wireless access terminal effluent journey:
When carrying out Data Receiving, judge among the present invention at the ARQ_seq link sequence number that every carrier link receives.If the ARQ_seq sequence number occurs at interval, illustrate that then bust this has taken place this link, can be described as among the present invention and produced the link cavity, write down the SAR_Seq sequence number of the RLP packet of this link cavity head end correspondence, it is the last arrival bag SAR_Seq sequence number of the RLP packet of disappearance (may be to lose, also no show still) afterwards; And the SAR_Seq sequence number of RLP packet that should cavity tail end correspondence, i.e. the SAR_Seq sequence number of the RLP packet of disappearance (may be to lose, also no show still) before this up-to-date arrival bag.
Simultaneously, can determine the SAR_Seq serial number range that lost data packets is affiliated according to the SAR_Seq sequence number of each packet that has received among the present invention, described SAR_Seq serial number range may be that a continuous serial number range also may be an a plurality of continuous serial number range at interval, corresponding each continuous serial number range of determining can be described as a NAK cavity, corresponding each NAK cavity can produce a NAK message among the present invention, and this message comprises following information:
1. the SAR_Seq serial number range of the RLP bag of losing
2. the link number that needs transmission
3. the link sequence number (number defines in a last field) that needs transmission
Need definite method of carrier link sequence number of transmission as follows: if this link has the link cavity, and the SAR_Seq sequence number of this pairing RLP bag in link cavity determines that then this carrier link is the carrier link that needs transmission in " losing the SAR_Seq serial number range of RLP bag " of this NAK message.
Simultaneously, in case the RLP sequence number of certain link cavity tail end is just thought that by NAK information reporting mistake this link cavity has disappeared.
Because the bag of multilink may arrive simultaneously, and may have a plurality of NAK cavity, so may produce several link cavity and several NAK message simultaneously.
The network side flow process:
One of network operation sends tabulation, writes down the SAR_Seq sequence number of the RLP that sends on each forward link.
After receiving NAK message,, need the link of transmission to send inquiry in the tabulation, whether wherein comprised the interior packet of SAR_Seq serial number range of the RLP bag of losing in the NAK message,, then retransmit if having at each according to the link sequence number in the NAK message.
Describe with concrete example below.
Example 1
The ARQ_Seq sequence number and the SAR_Seq sequence number of each RLP bag that the wireless access terminal receives from carrier link 1 and carrier link 2 are as follows:
Link 1: link 2:
<ARQ_Seq，SAR_Seq> <ARQ_Seq，SAR_Seq>
＜1,5〉--correct reception＜1,6〉--the correct reception
＜2,7〉--lose＜2,8--lose
＜3,9〉--correct reception＜3,10〉--also confiscate
When＜3,9〉arrive link 1 and＜3,10 still during no show link 2, because link 1 detects ARQ_seq and directly jumps to 3 from 1, the link cavity occurred, the SAR_Seq sequence number of the RLP packet of its link cavity head end is 7, and the SAR_Seq sequence number of the RLP packet of tail end is 8.But because the cavity does not appear in link 2 as yet.So need the link of transmission this moment is link 1.
At this moment, produce a NAK message, as follows:
NAK{
The SAR_Seq serial number range of the RLP bag of losing: 7～8
The link number that needs transmission: 1
The link sequence number that needs transmission: 1
}
Because the tail end RLP sequence number 8 in link 1 cavity of this moment is covered by this NAK message, so after sending this NAK message, think that this link 1 cavity disappears.
Network receives after this NAK message, can inquire about in the tabulation of link 1, and to find to have only in the tabulation RLP SAR_Seq sequence number be 7 packet the losing in the RLP packet sequence number scope of NAK, is 7 packet so network retransmits the RLP sequence number.
When subsequently＜3,10 when arriving link 2,, link 2 directly jumps to 3 from 1 because detecting ARQ_seq, and link 2 cavities have appearred, and the RLP packet SAR_Seq sequence number of its link 2 empty head ends is 7, and the RLP packet SAR_Seq sequence number of tail end also is 8.But because link 1 cavity disappears.So need the link of transmission this moment is link 2.
At this moment, produce a NAK message, as follows:
NAK{
The SAR_Seq serial number range of the RLP bag of losing: 7～8
The link number that needs transmission: 1
The link sequence number that needs transmission: 2
}
Because the tail end RLP packet SAR_Seq sequence number 8 in link 2 cavities of this moment is covered by this NAK message, so after sending this NAK message, think that these link 2 cavities disappear.
Network is received after this NAK message, can in the transmission tabulation of link 2, inquire about, find to send have only in the tabulation SAR_Seq sequence number be the sequence number of 8 RLP packet in the lost data packets RLP of NAK message serial number range, be 8 packet so network retransmits the RLP sequence number.
Example 2
The ARQ_Seq sequence number and the SAR_Seq sequence number of each RLP bag that the wireless access terminal receives from carrier link 1 and carrier link 2 are as follows:
Link 1: link 2:
<ARQ_Seq，SAR_Seq> <ARQ_Seq，SAR_Seq>
＜1,5〉--correct reception＜1,6〉--the correct reception
＜2,7〉--lose＜2,8--lose
＜3,9〉--correct reception＜3,10〉--the correct reception
Suppose＜3,9＜3,10 when arriving link 1 and link 2 respectively simultaneously.Because link 1 detects packet ARQ_seq and directly jumps to 3 from 1, link 1 cavity occurred, the RLP sequence number of its link 1 empty head end is 7, and the RLP sequence number of tail end is 8.Link 2 detects ARQ_seq and directly jumps to 3 from 1, link 2 cavities occurred, and the RLP sequence number of its link 2 empty head ends is 7, and the RLP sequence number of tail end is 8.Because this moment, the cavity all appearred in link 1 and link 2, so need the link of transmission to have 2, link 1 this moment.
At this moment, produce a NAK message, as follows:
NAK{
The SAR_Seq serial number range of the RLP bag of losing: 7～8
The link number that needs transmission: 2
The link sequence number that needs transmission: 1
The link sequence number that needs transmission: 2
}
Because the SAR_Seq sequence number 8 of the tail end RLP in link 1,2 cavities of this moment bag is all covered by this NAK message, so after sending this NAK message, think that these link 1,2 cavities disappear simultaneously.
Network is received after this NAK message, inquiry in the transmission tabulation of link 1,2 respectively, find link 1 send the SAR_Seq sequence number of having only the RLP bag in the tabulation be 7 byte in the SAR_Seq serial number range of losing the RLP bag of NAK, be 7 byte so network retransmits the SAR_Seq sequence number of RLP bag.And the SAR_Seq sequence number of in link 2 tabulation, having only the RLP bag be 8 packet in the SAR_Seq serial number range of losing the RLP bag of NAK, be 8 packet so network retransmits the SAR_Seq sequence number of RLP bag.
Example 3
The ARQ_Seq sequence number and the SAR_Seq sequence number of each RLP bag that the wireless access terminal receives from carrier link 1 and carrier link 2 are as follows:
＜1,1〉arrive＜1,2〉arrive
＜2,3〉arrive＜2,4〉lose
＜3,5〉arrive＜3,6〉arrive
＜4,7〉arrive＜4,8〉do not arrive
＜5,9〉lose＜5,10 do not arrive
＜6,11〉arrive＜6,12〉do not arrive
As if＜6,11〉and＜3,6 arrive simultaneously, then link 1 can detect a link cavity, and the scope in this link cavity is 8 to 10; Link 2 also can detect a link cavity, and link cavity scope is 4 to 4.
In addition, also can detect two continuous serial number ranges of SAR_Seq (4-4 and 8 to 10) at interval, i.e. two NAK cavities in the wireless access terminal.The method according to this invention for first NAK cavity, is constructed a NAK message, and is as follows:
NAK{
The SAR_Seq serial number range of the RLP bag of losing: 4～4
The link number that needs transmission: 1
The link sequence number that needs transmission: 2
}
Another one NAK message is as follows:
NAK{
The SAR_Seq serial number range of the RLP bag of losing: 8～10
The link number that needs transmission: 1
The link sequence number that needs transmission: 1
}
Two NAK message of above-mentioned employing are when avoiding occurring a plurality of NAK cavity, simultaneously a plurality of link informations to be transmitted up, cause unnecessary retransmission, for example above-mentioned link 1 cavity, the cavity has also appearred in link 2, for link 1 cavity, if also link 2 is reported when sending NAK message, then link 2＜4,8＜5,10 all can be retransmitted, but this is wrong, because the also not emission of these two bags this moment.
The following describes another aspect of the present invention.
With reference to figure 3, this figure be in the multi-carrier DO system of the present invention based on the data re-transmission system schematic of error feedback mechanism, mainly comprise:
Repeat requests end 11: be arranged on the wireless access terminal, be used to detect the carrier link of determining lost data packets, and determine the first packet sequence number scope under the described lost data packets according to the first packet sequence number of each packet that has received; Then the identification information of the carrier link of described lost data packets and the first packet sequence number scope under the described lost data packets are sent to network side, during specific implementation, described repeat requests end 11 mainly comprises:
The carrier link of lost data packets detects determines device 111, whether continuous, and determine that the discontinuous carrier link of the described second packet sequence number is the carrier link of lost data packets detecting on the carrier link the discontinuous back of the data packets for transmission second packet sequence number if being used on the detected carrier link the second packet sequence number of data packets for transmission;
Error feedback control messages apparatus for assembling 112 is used for the wireless access terminal identification information of the carrier link at the first packet sequence number scope under the described lost data packets, lost data packets place and the carrier link number of lost data packets is assembled into the error feedback control messages;
Message dispensing device 113 is used for described error feedback control messages is transferred to network side, the packet of request network side retransmission of lost.
Data re-transmission end 12: be arranged on network side, determine that according to the carrier link identification information of described lost data packets and the first packet sequence number scope under the described lost data packets needs carry out the lost data packets of data re-transmission, described lost data packets is retransmitted, during specific implementation, described data re-transmission end 12 mainly comprises:
Device 121 is determined in the lost data packets inquiry, inquires about data packets for transmission tabulation on this carrier link according to the carrier link identification information of lost data packets; And determine to belong in the described packet tabulation packet of the described first packet sequence number scope for carrying out the lost data packets of data re-transmission;
Retransmit dispensing device 122, be used for the lost data packets that described definite needs carry out data re-transmission is sent.
To sum up, the present invention has simplified the NAK message of mobile phone side.Do not need the information of all carrier links is reported, only reporting needs the carrier link of transmission information, can save a lot of message-lengths, and particularly under the more situation of carrier wave number, this improvement meeting is more obvious.Secondly the length of carrier link sequence number is less than the length of RLP packet sequence number.The NAK message-length is reduced, reduce the transport overhead loss, also increase the reception possibility of success simultaneously.
In addition, comprise in the NAK message of wireless access terminal side and need the carrier link of transmission information, after network side is received NAK message, do not need to travel through all records, as long as find the packet of this link to send the packet that tabulation just need can determine re-transmission, can improve the network side treatment effeciency.
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 (10)
1, a kind of data repeating method based on error feedback mechanism, all packets that transmit on each carrier link for the wireless access terminal are specified has the successional first packet sequence number, it is characterized in that, comprising:
The carrier link of determining the possibility lost data packets is detected in a, wireless access terminal;
The first packet sequence number scope that lost data packets is affiliated is determined according to the first packet sequence number of each packet that has received in b, wireless access terminal;
C, wireless access terminal are sent to network side with the identification information of the carrier link of described lost data packets and the first packet sequence number scope under the described lost data packets;
D, network side are determined the lost data packets that needs retransmit according to the carrier link identification information and the first packet sequence number scope under the described lost data packets of described lost data packets, and described lost data packets is retransmitted.
2, the data repeating method based on error feedback mechanism according to claim 1, it is characterized in that, have the successional second packet sequence number for data packets for transmission on each carrier link that is assigned to the wireless access terminal specifies on its affiliated carrier link in the described multicarrier system, detect the carrier link of determining lost data packets among the step a and specifically comprise:
It is discontinuous that the wireless access terminal detects the second packet sequence number of each packet that transmits on the carrier link, determines that then the discontinuous carrier link of the described second packet sequence number is the carrier link of lost data packets.
3, the data repeating method based on error feedback mechanism according to claim 1 is characterized in that, step b determines that the first packet sequence number scope of the packet lost is a continuous serial number range, and step c specifically comprises:
The wireless access terminal is at error feedback control messages of this first continuous packet sequence number scope structure, is packaged with the identification information of carrier link at this first packet sequence number scope, lost data packets place and the carrier link number of lost data packets in the described error feedback control messages;
Described error feedback control messages is transferred to network side, the packet of request network side retransmission of lost.
4, the data repeating method based on error feedback mechanism according to claim 1 is characterized in that, the first packet sequence number scope that step b determines is an a plurality of continuous serial number range at interval, and step c specifically comprises:
The error feedback control messages of corresponding number is constructed at the described first packet scope a plurality of continuous serial number range at interval in the wireless access terminal, is packaged with the identification information of carrier link at the first corresponding packet sequence number scope, lost data packets place and the carrier link number of lost data packets in each error feedback control messages;
Described a plurality of error feedback control messages are transferred to network side, the packet of request network side retransmission of lost.
5, the data repeating method based on error feedback mechanism according to claim 1, it is characterized in that, determine that according to the carrier link identification information of described lost data packets and the first packet sequence number scope under the described lost data packets lost data packets that needs carry out data re-transmission comprises in the steps d:
Network side is inquired about data packets for transmission transmission tabulation on this carrier link according to the carrier link identification information of lost data packets;
Determine that it is the lost data packets that need carry out data re-transmission that described packet sends the packet that belongs to the described first packet sequence number scope in the tabulation.
6, according to claim 3 or 4 described data repeating methods, it is characterized in that, report the data packet transmission healing of error feedback control information to the first packet sequence number scope of the lost data packets of its feedback of acquiescence behind the network side based on error feedback mechanism.
7, the data repeating method based on error feedback mechanism according to claim 1 is characterized in that, described carrier link identification information is forward link sequence number FL_ID.
8, the data repeating method based on error feedback mechanism according to claim 1, it is characterized in that described error feedback mechanism is: based on the error feedback mechanism of default grouping application or based on the error feedback mechanism of default multithread grouping or based on the error feedback mechanism that strengthens the multithread grouping.
9, a kind of data re-transmission system based on error feedback mechanism, all packets that transmit on each carrier link for the wireless access terminal are specified has the successional first packet sequence number, it is characterized in that, comprising:
Repeat requests end: be arranged on the wireless access terminal, be used to detect the carrier link of determining lost data packets, and determine the first packet sequence number scope under the described lost data packets according to the first packet sequence number of each packet that has received; Then the identification information of the carrier link of described lost data packets and the first packet sequence number scope under the described lost data packets are sent to network side;
Data re-transmission end: be arranged on network side, determine the lost data packets that needs retransmit, described lost data packets is retransmitted according to the carrier link identification information and the first packet sequence number scope under the described lost data packets of described lost data packets.
10, the data re-transmission system based on error feedback mechanism according to claim 9, it is characterized in that, have the successional second packet sequence number for data packets for transmission on each carrier link that is assigned to the wireless access terminal specifies on its affiliated carrier link in the described multicarrier system, described repeat requests end comprises:
The carrier link of lost data packets detects determines device, whether continuous, and determine that the discontinuous carrier link of the described second packet sequence number is the carrier link of lost data packets detecting on the carrier link the discontinuous back of the data packets for transmission second packet sequence number if being used on the detected carrier link the second packet sequence number of data packets for transmission;
Error feedback control messages apparatus for assembling is used for the wireless access terminal identification information of the carrier link at the first packet sequence number scope under the described lost data packets, lost data packets place and the carrier link number of lost data packets is assembled into the error feedback control messages;
The message dispensing device is used for described error feedback control messages is transferred to network side, the packet of request network side retransmission of lost;
Described data re-transmission end comprises:
The lost data packets inquiry unit is inquired about data packets for transmission transmission tabulation on this carrier link according to the carrier link identification information of lost data packets; And determine that it is the lost data packets that need carry out data re-transmission that described packet sends the packet that belongs to the described first packet sequence number scope in the tabulation;
Retransmit dispensing device, be used for the lost data packets that described definite needs carry out data re-transmission is sent.
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| CNB200510036790XA CN100471101C (en) | 2005-08-29 | 2005-08-29 | Repeating method for data based on error feedback mechanism and relative system |
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