CN102843223B - The method and system that a kind of data are retransmitted - Google Patents
The method and system that a kind of data are retransmitted Download PDFInfo
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- CN102843223B CN102843223B CN201110169211.4A CN201110169211A CN102843223B CN 102843223 B CN102843223 B CN 102843223B CN 201110169211 A CN201110169211 A CN 201110169211A CN 102843223 B CN102843223 B CN 102843223B
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Abstract
The present invention discloses the method and system that a kind of data are retransmitted, this method is included in local terminal to be had after the data for sending priority to opposite end send configuration, the response message that local terminal wireless chain control layer feeds back according to the wireless chain control layer and media access control layer of opposite end, wireless chain control layer retransmission process is carried out according to default principle.The present invention is preferentially sent to delay sensitive business in the prior art by above technical scheme, solution, the technical problem for causing transmitting terminal RLC data to retransmit by mistake.
Description
Technical field
The present invention relates to the communications field, more particularly to the method and system that a kind of data are retransmitted.
Background technology
There is abundant application in Internet network, such as business of networking, ftp downloads application service, mail service industry
Business, streaming media service, multimedia message service etc., in these abundant applications, partial service is delay sensitive business, such as Streaming Media
Business, partial service is the insensitive business of time delay, such as background download business.
Sent to enter row major to delay sensitive business, someone expects that the transmission higher to delay sensitive business configuration is excellent
First level, the transmission priority different to the data configuration of different service types certainly will cause its RLC (Radio Link
Control, wireless chain control layer) data send and receive it is out of order, but based on the current network architecture, such as 3G or
LTE (Long Term Evolution, long evolving system), its RLC data, which send and receive, to be required for ensureing by sequence,
When the transmission of RLC data is out of order, RLC receiving terminal can be mistaken for packet loss of eating dishes without rice or wine, and RLC receiving terminal can send negative by mistake should
The state bag answered, the packet for ultimately resulting in transmitting terminal RLC is retransmitted by mistake, so as to deteriorate link performance.
Therefore, prior art can not solve preferentially to send delay sensitive business the data re-transmission by mistake for causing transmitting terminal RLC
The problem of.
The content of the invention
The present invention provides the method and system that a kind of data are retransmitted, and solution is preferentially sent out delay sensitive business in the prior art
Send, the technical problem for causing transmitting terminal RLC data to retransmit by mistake.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of method that data are retransmitted, including：
After local terminal has the data for sending priority to opposite end send configuration, local terminal wireless chain control layer is according to opposite end
The response message of wireless chain control layer and media access control layer feedback, wireless chain control layer is carried out according to default principle
Retransmission process.
The local terminal wireless chain control layer feeds back according to the wireless chain control layer and media access control layer of opposite end
Response message, carrying out wireless chain control layer retransmission process according to default principle includes following manner：
If the wireless chain control layer feedback of the opposite end for negative response, and the medium access control of the opposite end
Layer feedback for affirmative acknowledgement, then No starting wireless chain control layer is retransmitted；
If the wireless chain control layer feedback of the opposite end for negative response, and the medium access control of the opposite end
Layer feedback for negative response, then start wireless chain control layer and retransmit；
If the wireless chain control layer feedback of the opposite end for affirmative acknowledgement, and the medium access control of the opposite end
Layer feedback for affirmative acknowledgement, then No starting wireless chain control layer is retransmitted.
The data for being configured with transmission priority include time-delayed sensitive data and the insensitive data of time delay, and the time delay is quick
Feeling data data more insensitive than time delay has higher transmission priority.
Local terminal wireless chain control layer is according to answering that the wireless chain control layer and media access control layer of opposite end feed back
Message is answered, the method for carrying out wireless chain control layer retransmission process according to default principle includes：
Local terminal wireless chain control layer receives local terminal media access control layer and sent out by way of changing Iub data frame structures
The response message for the opposite end media access control layer feedback sent；
The response message that local terminal wireless chain control layer feeds back according to the opposite end media access control layer is received with itself
Opposite end wireless chain control layer feedback response message, according to default principle carry out wireless chain control layer retransmission process.
Local terminal wireless chain control layer is according to answering that the wireless chain control layer and media access control layer of opposite end feed back
Message is answered, the method for carrying out wireless chain control layer retransmission process according to default principle includes：
Local terminal media access control layer receives the response message of opposite end media access control layer feedback, and up by parsing
Wireless chain control layer state bag in packet obtains the response message of opposite end wireless chain control layer feedback；
Local terminal media access control layer judges the response message of the opposite end wireless chain control layer feedback and the opposite end
Whether the response message of media access control layer feedback is consistent；
If consistent, the response message that the opposite end wireless chain control layer feeds back is sent to local terminal Radio Link control
Preparative layer；
If it is inconsistent, it is wireless to update the opposite end according to the response message of opposite end media access control layer feedback
The response message of link control layers feedback, and the response message of the opposite end wireless chain control layer feedback after renewal is sent to this
Hold wireless chain control layer；
The response message that local terminal wireless chain control layer feeds back according to the opposite end wireless chain control layer after renewal, according to pre-
If principle carries out wireless chain control layer retransmission process.
Fed back in local terminal wireless chain control layer according to the wireless chain control layer and media access control layer of opposite end
Response message, before default principle progress wireless chain control layer retransmission process, in addition to：The medium access control of local terminal
The response message that layer feeds back according to the media access control layer of opposite end carries out media access control layer retransmission process.
The response message that the media access control layer of local terminal feeds back according to the media access control layer of opposite end carries out medium visit
Asking the method for key-course retransmission process includes：If the media access control layer feedback of opposite end for negative response, start and be situated between
Matter MAC layer is retransmitted, and when number of retransmissions is more than preset value, forbids media access control layer to retransmit, and to the medium of local terminal
MAC layer feeds back negative response.
A kind of system of data packet retransmission, including local terminal and opposite end, the local terminal are used for having transmission to opposite end send configuration
Wireless chain control layer and media access control layer are respectively arranged with the data of priority, the local terminal and opposite end, wherein, institute
State the response that local terminal wireless chain control layer is used to feed back according to the wireless chain control layer and media access control layer of opposite end
Message, wireless chain control layer retransmission process is carried out according to default principle.
The local terminal wireless chain control layer is negative response for the wireless chain control layer feedback in the opposite end,
And the opposite end media access control layer feedback for affirmative acknowledgement when, No starting wireless chain control layer retransmit；Institute
State opposite end wireless chain control layer feedback for negative response, and the media access control layer feedback of the opposite end for negative
During response, start wireless chain control layer and retransmit；Wireless chain control layer in the opposite end feed back for affirmative acknowledgement, and institute
State opposite end media access control layer feedback for affirmative acknowledgement when, No starting wireless chain control layer retransmit.
The local terminal wireless chain control layer is specifically for receiving local terminal media access control layer by changing Iub data frames
The response message for the opposite end media access control layer feedback that the mode of structure is sent；And according to the opposite end media access control layer
The response message of the wireless chain control layer feedback for the opposite end that the response message of feedback is received with itself, is carried out according to default principle
Wireless chain control layer retransmission process.
The response message that the local terminal media access control layer feeds back specifically for reception opposite end media access control layer, and
The response that wireless chain control layer feedback in opposite end is obtained by parsing the wireless chain control layer state bag in upstream data bag disappears
Breath；Judge the response of the response message and opposite end media access control layer feedback of the opposite end wireless chain control layer feedback
Whether message is consistent；If consistent, the response message that the opposite end wireless chain control layer feeds back is sent wireless to local terminal
Link control layers；If it is inconsistent, the response message fed back according to the opposite end media access control layer updates the opposite end
The response message of wireless chain control layer feedback, and the response message of the opposite end wireless chain control layer feedback after renewal is sent
To local terminal wireless chain control layer；
The local terminal wireless chain control layer is specifically for answering for being fed back according to the opposite end wireless chain control layer after renewal
Message is answered, wireless chain control layer retransmission process is carried out according to default principle.
The local terminal media access control layer is additionally operable to the Radio Link control according to opposite end in local terminal wireless chain control layer
The response message of preparative layer and media access control layer feedback, according to default principle carry out wireless chain control layer retransmission process it
Before, the response message fed back according to the media access control layer of opposite end carries out media access control layer retransmission process.
The present invention provides the method and system that a kind of data are retransmitted, and has in local terminal to opposite end send configuration and sends priority
After data, the response that local terminal wireless chain control layer feeds back according to the wireless chain control layer and media access control layer of opposite end
Message, wireless chain control layer retransmission process is carried out according to default principle, and out of order lead is sent present invention effectively prevents RLC data
RLC receiving terminal feedback negative response by mistake is caused, causes transmitting terminal RLC data to retransmit by mistake, so as to deteriorate link performance.
Brief description of the drawings
Fig. 1 is the flow chart for the method that a kind of data of the embodiment of the present invention are retransmitted；
Fig. 2 is the flow chart for the method that a kind of data of another embodiment of the present invention are retransmitted；
Fig. 3 is the frame structure schematic diagram for the transmission status information that the embodiment of the present invention carries Mac-hs packets；
Fig. 4 is the flow chart for the method that a kind of data of another embodiment of the present invention are retransmitted；
Fig. 5 is the flow chart for the method that a kind of data of another embodiment of the present invention are retransmitted.
Embodiment
The present invention is described in further detail below by embodiment combination accompanying drawing.
Rlc protocol be WCDMA (Wideband Code Division Multiple Access, WCDMA),
TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, time division synchronous code division
Multiple access), be responsible for data sectional restructuring, ARQ (the Automatic Repea t- of flow control in 3G and LTE system
Request, HARQ) entity, its most important function is that data are retransmitted, i.e., transmitting terminal is according to answering that receiving terminal feeds back
Message is answered, data are selectively retransmitted, so that ensure the reliability that data are sent, and the response message of receiving terminal feedback includes agreeing
Determine response and negative response, if receiving terminal receives certain data, respond affirmative acknowledgement, if receiving terminal does not receive certain number
According to, then negative response is responded, can false touch if certain data for receiving of receiving terminal and the data above received have out of order relation
Send out negative response.
MAC (Medium Access Control, media access control layer) agreement, after 3gpp R5, introduces ARQ,
Therefore it possesses the ability for sending data and feedback response, that is to say, that Mac sends data, peer layer Mac to peer layer Mac
The response message (including negative response and affirmative acknowledgement) to the data is sent in ascending control channel, transmitting terminal Mac can root
Decide whether to retransmit the data of loss according to the response message to the layer such as receiving terminal Mac, possess transmission data and feedback should
The Mac entities for answering ability are not limited to Mac-hs, Mac-e, Mac-ehs entity in WCDMA and TD-SCDMA system, LTE systems
Mac entities in system.
Embodiment one：
Fig. 1 is the flow chart for the method that a kind of data of the embodiment of the present invention are retransmitted, and refer to Fig. 1：
S11, local terminal have the data for sending priority to opposite end send configuration；
S12, local terminal wireless chain control layer feed back according to the wireless chain control layer and media access control layer of opposite end
Response message, according to default principle carry out wireless chain control layer retransmission process.
The IP data of application layer can be received in local terminal RLC according to the transmission priority in migration efficiency configuration step S11
Afterwards, the IP heads of application layer data are parsed, by parsing IP identifications type of service (such as http business, or mail business
Deng), the data flow to each type of service sets different transmission priority, and difference is respectively configured with downloading service in such as business of networking
Priority, local terminal RLC sends the data to lower floor's Mac entities, and carries corresponding transmission priority；Mac entities receive number
According to rear, the RLC information of corresponding data is parsed, Mac entities deliver a packet to opposite end according to the transmission priority of packet
Mac entities, opposite end RLC entities are received after data, and the high priority data first received is submitted into opposite end application layer.
Step S12 includes following manner：
If the wireless chain control layer feedback of the opposite end for negative response, and the medium access control of the opposite end
Layer feedback for affirmative acknowledgement, then No starting wireless chain control layer is retransmitted；
If the wireless chain control layer feedback of the opposite end for negative response, and the medium access control of the opposite end
Layer feedback for negative response, then start wireless chain control layer and retransmit；
If the wireless chain control layer feedback of the opposite end for affirmative acknowledgement, and the medium access control of the opposite end
Layer feedback for affirmative acknowledgement, then No starting wireless chain control layer is retransmitted.
The present embodiment data retransmit method, using Mac layer response messages eliminate data it is out of order to RLC data transmission
Influence, it is to avoid retransmit by mistake so that high-priority applications data can preferentially be sent, improve user experience.
The present embodiment is applied to WCDMA, TD-SCDMA, LTE or GSM (Global System of Mobile
Communication, abbreviation GSM) etc. system.
Embodiment two：
Fig. 2 is the flow chart for the method that a kind of data of another embodiment of the present invention are retransmitted, and refer to Fig. 2：
By taking the descending transmission of WCDMA system as an example, its PDCP (PDCP) and RLC entities are (wireless in RNC
Network controller) on, and Mac-hs entities are on Nodeb.
S21, RNC receive the data that core net is issued, its PDCP layers of parsing application data, and with source IP in IP traffic
Location, target ip address, source port number, destination port number, which all correspond to identical data flow, turns into same application data stream, and RNC is
Each application data stream, which is set, sends priority, preferential, it is excellent that the data in same application data stream keep identical to send
First level.
The packet of each application data stream is sent to Nodeb by S22, RNC, and it is preferential to carry the transmission of corresponding data bag
Level, carrying mode includes self-defined frame structure or extends existing frame structure.Can be existing in 3gpp25.4256.2.4A
It is extended on the basis of the FRAME structure frame structures of HS-DSCH DATA TYPE 1, it is each in the frame structure
4bit spare fields increase extended field SPI (Schedule Prior Indicate) before Mac-d PDU, represents Mac-d numbers
According to the transmission priority of bag, its span is 0-15, and 0 is that priority is minimum, and 15 be highest priority, the data frame other
Field uses prior art.
S23, Nodeb are received after data, parse each Mac-d PDU, and preserve its correspondence RLC SN (rlc protocol data
The sequence number of bag), Mac-hs sends data according to the transmission priority of corresponding data bag to the Mac-hs of end side, Nodeb according to
The response message of the Mac-hs feedbacks of end side updates the Mac-d that corresponding Mac-hs packets are included in local data base
PDU is identified：If the Mac-hs of end side have received Mac-hs PDU datas, corresponding data is responded to Nodeb Mac-hs
Affirmative acknowledgement, the Mac-d PDU that Nodeb is in the local database included corresponding Mac-hs packets are designated transmission
Success, if the Mac-hs of end side does not receive data, responds negative response, Nodeb starts Mac-hs and retransmitted, to terminal
The Mac-hs of side retransmits corresponding Mac-hs data, if repeatedly retransmitted, when number of retransmissions reaches preset value, Nodeb Mac-
Hs does not receive the affirmative acknowledgement of corresponding data bag still, then Nodeb is by the data packet discarding, and in the local database should
The Mac-d PDU that Mac-hs packets are included are designated transmission failure.
S24, Nodeb send the transmission status information of Mac-hs packets to RNC, as above-mentioned Mac-hs packets are included
Mac-d PDU marks, the transmission status information for each packet that RNC reports Nodeb Mac-hs layers is saved in locally
Database.After RNC RLC receives terminal RLC to the response messages of UE sides, the Mac- for the Nodeb that local data base is preserved
The hs layers of transmission status information of each packet that reports and end side RLC are compared to the response message of UE sides, for certain
Individual data, if the transmission status information that Nodeb Mac-hs layers are reported in local data base is is successfully transmitted, end side RLC
The response message of feedback is negative response, then it is believed that Nodeb Mac-hs successfully sends the data to end side, terminal
Side RLC negative response is because the state bag sent caused by data packet disorder by mistake, therefore, with RNC local data bases
The transmission status information that Nodeb Mac-hs layers are reported is defined, and RNC RLC does not retransmit data to end side；For certain number
According to, if the transmission status information that Nodeb Mac-hs layers are reported in local data base is unsuccessfully sends, end side RLC feedbacks
Response message also be negative response, it is believed that end side RLC feedback response message effectively, RNC RLC is retransmitted to end side
The data.
In step S24, the mode that Nodeb sends the transmission status information of Mac-hs packets to RNC has a variety of, Ke Yi
It is extended in existing frame structure, self-defined frame structure can also be used, Fig. 3 is that the embodiment of the present invention carries Mac-hs data
The frame structure schematic diagram of the transmission status information of bag, refer to Fig. 3, and Fig. 3 utilizes existing 3gpp, 25.425 6.3.3.5 agreements
In HS-DSCH Capacity Request frame structures be extended, extended field START RLC SN represent RLC sequences in figure
Number original position, Status NUM represent the transmission status information of how many Mac-hs packets, and BIMAP represents position
Figure, that is, represent the transmission status information from start RLCSN to start RLCSN+StatusNum-1 packets, each bit
(1 represents to send successful status information the transmission status information of one packet of position expression, and 0 represents that sending successful state believes
Breath).
Because the mac-hs packets of Nodeb sides are provided with transmission priority, the high Mac-d Pdu of priority data
Bag is preferential to be sent, and the RLC packets generation for causing end side to receive is out of order, and it is packet loss, meeting that end side, which can be mistakenly considered such a scene,
Feed back negative response, when the mac-hs of end side feed back be affirmative acknowledgement when, the RLC of end side may feed back negative should
Answer, RLC re-transmissions can be started according to the technical scheme of prior art, under such a scene, this is a kind of re-transmission by mistake, so as to deteriorate link
Performance, and the present invention helps RLC to solve the out of order negative effect brought using the Mac-hs of end side response, while can put
The row major that enters to time-delayed sensitive data of the heart is transmitted.
The present embodiment is not limited to, using in a wcdma system, similarly fit in the systems such as TD-SCDMA, LTE or GSM
With.
Embodiment three：
Fig. 4 is the flow chart for the method that a kind of data of another embodiment of the present invention are retransmitted, and refer to Fig. 4：
By taking the descending transmission of WCDMA system as an example, itself PDCP and RLC entity on RNC (radio network controller), and
MAC-hs entities are on Nodeb.
S31, RNC receive the data that core net is issued, its PDCP entity resolution application data, and with source IP in IP traffic
Address, target ip address, source port number, destination port number, which all correspond to identical data flow, turns into same application data stream, RNC
Set for each application data stream and send priority, preferential, the data in same application data stream keep identical to send
Priority.
The packet of each application data stream is sent to Nodeb by S32, RNC, and it is preferential to carry the transmission of corresponding data bag
Level, carries the mode for sending priority as implemented described in two.
S33, Nodeb are received after data, parse each Mac-d PDU, and preserve its corresponding RLC SN, Mac-hs according to
The transmission priority of corresponding data bag, sends data, if the Mac-hs of end side have received Mac- to the Mac-hs of end side
After hs PDU datas, then the confirmation bag of the affirmative acknowledgement of corresponding data is responded to Nodeb Mac-hs, Nodeb is in local data
The Mac-d PDU for being included corresponding Mac-hs packets in storehouse, which are designated, to be sent successfully, if the Mac-hs of end side does not have
Mac-hs PDU datas are received, then the confirmation bag of the negative response of corresponding data is responded to Nodeb Mac-hs, Nodeb is opened
Dynamic Mac-hs is retransmitted, and retransmits corresponding Mac-hs data to the Mac-hs of end side, if repeatedly retransmitted, number of retransmissions reaches pre-
If maximum when, Nodeb Mac-hs does not receive the confirmation bag of the affirmative acknowledgement of corresponding data bag still, then Nodeb will
The data packet discarding, and the MAC-D PDU in the local database being included the Mac-hs packets are designated transmission failure.
S34, Nodeb detect the user uplink data bag, and parse the RLC state bags in these packets.
S35, by corresponding Mac-hs packets are included in Nodeb local data bases Mac-d PDU mark and terminal
Response message in the RLC state bags of side feedback is compared, and judges corresponding Mac-hs packets in Nodeb local data bases
Comprising Mac-d PDU mark with end side feedback RLC state bags in response message it is whether consistent, if unanimously,
S36 is performed, otherwise, S37 is performed.
The Mac-d PDU marks that corresponding Mac-hs packets are included in S36, local data base are anti-with end side RLC
The response message of feedback is consistent, then the RLC state bags fed back in the end side are transmitted directly to RNC RLC by Nodeb, such as certain
Individual data, send successfully, terminal if the Mac-d PDU that corresponding Mac-hs packets are included in local data base are designated
The RLC states bag of side RLC feedbacks is affirmative acknowledgement, then the RLC state bags that end side RLC feeds back is transmitted directly into RNC's
RLC。
The Mac-d PDU marks that corresponding Mac-hs packets are included in S37, local data base are anti-with end side RLC
The response message of feedback is inconsistent, and Nodeb is marked according to the Mac-d PDU that corresponding Mac-hs packets are included in local data base
Know the response message for updating end side RLC feedbacks, the RLC state bags obtained after renewal are sent to RNC RLC, such as certain
Individual data, send successfully, terminal if the Mac-d PDU that corresponding Mac-hs packets are included in local data base are designated
The RLC states bag of side RLC feedbacks is negative response, then it is believed that Nodeb Mac-hs successfully sends the data to terminal
Side, end side RLC negative response is that, because the state bag sent caused by data packet disorder by mistake, therefore, Nodeb is according to local
The Mac-d PDU marks that corresponding Mac-hs packets are included in database update the response message of end side RLC feedbacks, will
The RLC state bags obtained after renewal are sent to RNC RLC.
S38, RNC RLC are according to the RLC states bag directly forwarded by Nodeb received or after Nodeb updates
RLC state bags, RLC retransmission process is carried out according to default principle.
Nodeb needs to pass through to the RNC transmission status informations for sending Mac-hs packets in the step S24 of embodiment two
Interface between Iub mouthfuls, i.e. RNC and Nodeb, is sent to RNC, and RNC RLC compares Mac-hs response message and RLC
Response message, this needs self-defined frame structure or extends existing Iub interface data frame structure.And in the present embodiment, Nodeb inspections
The user uplink data bag is surveyed, and parses the RLC state bags in these packets, the response that Mac-hs is compared by Nodeb disappears
The response message of breath and RLC, therefore Iub interface data frame structure need not be modified, it is only necessary to RLC state bag is entered
Row parsing and package, Nodeb according to the comparative result of Mac-hs response message and RLC response message, if unanimously, directly
Connect and RLC response message is sent to RNC, if it is inconsistent, Nodeb updates answering for RLC according to Mac-hs response message
Message is answered, the response message of the RLC after renewal is sent to RNC RLC, therefore, such case RNC RLC is still according to association
Discuss and the response message of the RLC after RLC response message or renewal is handled.
The present embodiment is not limited to, using in a wcdma system, similarly fit in the systems such as TD-SCDMA, LTE or GSM
With.
Example IV：
Fig. 5 is the flow chart for the method that a kind of data of another embodiment of the present invention are retransmitted, and Fig. 5 is refer to, with WCDMA system
End side uplink data sending exemplified by：
S51, the PDCP parsing application datas of end side, and with source IP address in IP traffic, target ip address, source port
Number, destination port number, which all corresponds to identical data flow, turns into same application data stream, and sets hair for each application data stream
Priority is sent, and is sent to the RLC processing of end side.Preferential, the data in same application data stream keep identical hair
Send priority.
The packet of each application data stream is sent to the Mac of end side by S52, the RLC of end side, and carries correspondence number
According to the transmission priority of bag.
S53, end side parse each Mac-d PDU, and preserve its correspondence RLC SN, and the Mac of end side is according to correspondence number
According to the transmission priority of bag, data are sent to the Mac of network side, if the Mac of network side have received after Mac PDU datas, to
End side Mac entities respond the confirmation bag of the affirmative acknowledgement of corresponding data, and end side is in the local database by corresponding Mac numbers
It is designated and is sent successfully according to the Mac-d PDU for wrapping included, if the Mac of network side does not receive Mac PDU datas, to end
Side Mac entities respond the confirmation bag of the negative response of corresponding data, start Mac and retransmit, end side Mac retransmits corresponding Mac
Data, if after repeatedly retransmitting, when number of retransmissions reaches preset value, end side MAC entity does not receive corresponding data bag still
Affirmative acknowledgement confirmation bag, then end side abandons the data, and in local data area is included the Mac packets
Mac-d PDU are designated transmission failure.
The transmission status information of Mac data is sent to the RLC entities of end side, Mac numbers by S54, the Mac entities of end side
According to transmission status information include transmission that the successful status information of transmission that Mac-d PDU identify identifies with Mac-d PDU into
The status information of work(.The transmission status information for the Mac data that the RLC entities of end side send the Mac entities of end side is preserved
In local data base, the RLC entities of end side respond the transmission status information of Mac data in local data base and opposite end RLC
RLC state bags in response message be compared, for some data, if in local data base Mac data transmission shape
State information is sends successfully, and the response message of opposite end RLC feedbacks is negative response, then it is believed that RLC state bags are because data
The state bag sent is missed caused by bag is out of order, then the transmission status information of the data of the Mac in local data base is defined, and RLC is not
Data are retransmitted to opposite end；For some data, if the transmission status information of Mac data fails to send in local data base,
The response message of opposite end RLC feedbacks is also negative response, then it is assumed that RLC states package informatin effectively, its loss is retransmitted to opposite end
Packet.
The present embodiment is not limited to, using in a wcdma system, similarly fit in the systems such as TD-SCDMA, LTE or GSM
With.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert this hair
Bright specific implementation is confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of from present inventive concept, some simple deduction or replace can also be made, the protection of the present invention should be all considered as belonging to
Scope.
Claims (8)
1. a kind of method that data are retransmitted, it is characterised in that including：
After local terminal has the data for sending priority to opposite end send configuration, local terminal wireless chain control layer is according to the wireless of opposite end
The response message of link control layers and media access control layer feedback, wireless chain control layer re-transmission is carried out according to default principle
Processing；
The response that local terminal wireless chain control layer feeds back according to the wireless chain control layer and media access control layer of opposite end disappears
Breath, the method for carrying out wireless chain control layer retransmission process according to default principle includes：
Local terminal wireless chain control layer receives what local terminal media access control layer was sent by way of changing Iub data frame structures
The response message of opposite end media access control layer feedback；
Pair that the response message that local terminal wireless chain control layer feeds back according to the opposite end media access control layer is received with itself
The response message of the wireless chain control layer feedback at end, wireless chain control layer retransmission process is carried out according to default principle；
Or, local terminal media access control layer receives the response message of opposite end media access control layer feedback, and by parsing
Wireless chain control layer state bag in row packet obtains the response message of opposite end wireless chain control layer feedback；
Local terminal media access control layer judges the response message and the opposite end medium of the opposite end wireless chain control layer feedback
Whether the response message of MAC layer feedback is consistent；
If consistent, the response message that the opposite end wireless chain control layer feeds back is sent to local terminal wireless spread-spectrum technology
Layer；
If it is inconsistent, the response message fed back according to the opposite end media access control layer updates the opposite end Radio Link
The response message of key-course feedback, and by the response message of the opposite end wireless chain control layer feedback after renewal send to local terminal without
Wired link key-course；
The response message that local terminal wireless chain control layer feeds back according to the opposite end wireless chain control layer after renewal, according to default original
Then carry out wireless chain control layer retransmission process.
2. the method as described in claim 1, it is characterised in that the local terminal wireless chain control layer is according to the radio chains of opposite end
The response message of circuit control layer and media access control layer feedback, is carried out at wireless chain control layer re-transmission according to default principle
Reason includes following manner：
If the wireless chain control layer feedback of the opposite end for negative response, and the media access control layer of the opposite end is anti-
Feedback for affirmative acknowledgement, then No starting wireless chain control layer is retransmitted；
If the wireless chain control layer feedback of the opposite end for negative response, and the media access control layer of the opposite end is anti-
Feedback for negative response, then start wireless chain control layer and retransmit；
If the wireless chain control layer feedback of the opposite end for affirmative acknowledgement, and the media access control layer of the opposite end is anti-
Feedback for affirmative acknowledgement, then No starting wireless chain control layer is retransmitted.
3. the method as described in claim 1, it is characterised in that the data for being configured with transmission priority include delay sensitive
Data and the insensitive data of time delay, time-delayed sensitive data data more insensitive than time delay have higher transmission priority.
4. the method as described in any one of claims 1 to 3, it is characterised in that in local terminal wireless chain control layer according to opposite end
Wireless chain control layer and media access control layer feedback response message, according to default principle carry out wireless spread-spectrum technology
Before layer retransmission process, in addition to：The response that the media access control layer of local terminal feeds back according to the media access control layer of opposite end
Message carries out media access control layer retransmission process.
5. method as claimed in claim 4, it is characterised in that the media access control layer of local terminal is according to the medium access of opposite end
The method that the response message of key-course feedback carries out media access control layer retransmission process includes：If the medium access control of opposite end
Preparative layer feedback for negative response, then start media access control layer and retransmit, when number of retransmissions is more than preset value, forbid medium
MAC layer is retransmitted, and feeds back negative response to the media access control layer of local terminal.
6. a kind of system of data packet retransmission, it is characterised in that including local terminal and opposite end, the local terminal is used to send to opposite end and matched somebody with somebody
It is equipped with the data for sending priority, the local terminal and opposite end and is respectively arranged with wireless chain control layer and medium access control
Layer, wherein, the local terminal wireless chain control layer is used for wireless chain control layer and media access control layer according to opposite end
The response message of feedback, wireless chain control layer retransmission process is carried out according to default principle；
The local terminal wireless chain control layer is specifically for receiving local terminal media access control layer by changing Iub data frame structures
The response message of opposite end media access control layer feedback that sends of mode；And fed back according to the opposite end media access control layer
The response message of the wireless chain control layer feedback of opposite end that is received with itself of response message, carried out according to default principle wireless
Link control layers retransmission process；
Or, the response message that the local terminal media access control layer feeds back specifically for reception opposite end media access control layer,
And obtain the response that opposite end wireless chain control layer feeds back by parsing the wireless chain control layer state bag in upstream data bag
Message；Judge the response message of the opposite end wireless chain control layer feedback and answering for opposite end media access control layer feedback
Whether consistent answer message；If consistent, by the response message that the opposite end wireless chain control layer feeds back send to local terminal without
Wired link key-course；If it is inconsistent, the response message fed back according to the opposite end media access control layer updates described right
The response message of wireless chain control layer feedback is held, and the response message of the opposite end wireless chain control layer feedback after renewal is sent out
Deliver to local terminal wireless chain control layer；
The local terminal wireless chain control layer disappears specifically for the response fed back according to the opposite end wireless chain control layer after renewal
Breath, wireless chain control layer retransmission process is carried out according to default principle.
7. system as claimed in claim 6, it is characterised in that the local terminal wireless chain control layer is used in the opposite end
Wireless chain control layer feedback for negative response, and the media access control layer feedback of the opposite end for affirmative acknowledgement when,
No starting wireless chain control layer is retransmitted；Wireless chain control layer in the opposite end feed back for negative response, it is and described
Opposite end media access control layer feedback for negative response when, start wireless chain control layer retransmit；Nothing in the opposite end
Wired link key-course feedback for affirmative acknowledgement, and the media access control layer feedback of the opposite end for affirmative acknowledgement when, prohibit
Only start wireless chain control layer to retransmit.
8. system as claimed in claims 6 or 7, it is characterised in that the local terminal media access control layer is additionally operable in local terminal
The response message that wireless chain control layer feeds back according to the wireless chain control layer and media access control layer of opposite end, according to pre-
If principle is carried out before wireless chain control layer retransmission process, entered according to the response message that the media access control layer of opposite end feeds back
Row media access control layer retransmission process.
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| CN103684916A (en) * | 2013-12-13 | 2014-03-26 | 国家计算机网络与信息安全管理中心 | Method and system for intelligent monitoring and analyzing under cloud computing |
| CN108667567B (en) * | 2018-04-26 | 2020-10-23 | 北京空间飞行器总体设计部 | Low-overhead reliable transmission retransmission algorithm for spacecraft |
| CN109245867B (en) * | 2018-08-14 | 2022-09-27 | 深圳壹账通智能科技有限公司 | Message sending method, computer readable storage medium and terminal equipment |
| CN109496402B (en) * | 2018-10-12 | 2021-07-02 | 北京小米移动软件有限公司 | Identification updating method, device, equipment, system and storage medium |
| CN112105054A (en) * | 2019-06-18 | 2020-12-18 | 普天信息技术有限公司 | Downlink transmission method and system |
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| CN101652948A (en) * | 2007-04-06 | 2010-02-17 | 株式会社Ntt都科摩 | Retransmission request transmitting method, transmitting side apparatus and receiving side apparatus |
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