CN107888341A - A kind of data transmission method and device - Google Patents
A kind of data transmission method and device Download PDFInfo
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- CN107888341A CN107888341A CN201610868318.0A CN201610868318A CN107888341A CN 107888341 A CN107888341 A CN 107888341A CN 201610868318 A CN201610868318 A CN 201610868318A CN 107888341 A CN107888341 A CN 107888341A
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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
- H04L1/1806—Go-back-N 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
-
- 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
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Communication Control (AREA)
Abstract
The invention provides a kind of data transmission method and device, belong to wireless communication technology field.Wherein, the data transmission method applied to the data sending entity in 5G networks includes：After packet is sent to data receiver entity, the SN number informations of transmitted packet are recorded；First state report is sent to the data receiver entity, the SN number informations are carried in the first state report.By technical scheme, it can solve the problem that under NR individual layer SN structures, the problem of can not carrying out HARQ for multi-link separation carrying so that data normal transmission.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relates to a kind of data transmission method and device.
Background technology
NR (New Radio, newly eating dishes without rice or wine) supports in 5G (the 5th third-generation mobile communication technology) network are multi-link, if one
The different pieces of information bag of carrying is transmitted by multi-link different connections respectively, then the carrying is referred to as separating carrying (split
bearer).For split bearer, if an only layer SN (sequence number), and SN is in NR user plane highest Layer assignments, that
Mean that the SN in multi-link lower different connections is discontinuous.In this case, if ARQ is made in each connection respectively
(Automatic Repeat-reQuest, HARQ), then this may result in one hair of receiving terminal indefinite duration wait
Sending end at all without send SN corresponding to packet, so as to cause receive window can not move, receive window stagnate, data without
Method normal transmission.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of data transmission method and device, can solve the problem that NR individual layers SN is tied
Under structure, the problem of can not carrying out HARQ for multi-link separation carrying so that data normal transmission.
In order to solve the above technical problems, embodiments of the invention offer technical scheme is as follows：
On the one hand, there is provided a kind of data transmission method, applied to the data sending entity in 5G networks, methods described bag
Include：
After PDU is sent to data receiver entity, transmitted PDU SN is recorded；
First state report is sent to the data receiver entity, the letter of the SN is carried in the first state report
Breath.
Further, it is described to include to data receiver entity transmission first state report：
The first state is sent according to the default transmission cycle to the data receiver entity to report；Or
The first state is sent when meeting preparatory condition to the data receiver entity to report.
Further, the preparatory condition includes：
It is upper once send first state report after, the data sending entity to data receiver entity send PDU number
Amount reaches N；Or
It is upper once send first state report after, the data sending entity to data receiver entity send PDU it is total
Byte number reaches M；Or
When satisfaction inquires after trigger condition；
Wherein, M, N are the integer not less than 1.
Further, the first state is reported as independent PDU, and the PDU of the first state report includes PDU payloads
With corresponding PDU heads.
Further, the PDU of first state report length is fixed；Or
The PDU of first state report length be it is unfixed, the first state report include SN information with
And identified correspondingly with SN information, other SN letter after the information of the corresponding SN of mark instruction whether also be present
Breath.
Further, the content of the PDU payloads includes：
Between at the time of report at the time of last time sends first state report to currently transmitted first state, the data
The SN for all PDU that sending entity is sent information.
Further, the information of the SN in first state report for it is last send first state report at the time of to
Between at the time of currently transmitted first state report, the SN for all PDU that the data sending entity is sent；Or
Between at the time of report at the time of last time sends first state report to currently transmitted first state, the data
Sending entity send all PDU in a PDU SN and other PDU relative to the SN of the PDU or SN previous SN
Deviant；Or
Between at the time of report at the time of last time sends first state report to currently transmitted first state, the data
The maximum S/N included in the first state report that the SN for all PDU that sending entity is sent is sent relative to the last time or the SN
Previous SN deviant.
Further, the first state report is carried in data PDU,
The first state report is included in N number of PDU of data PDU foregoing description data sending entity transmission SN；
And/or
First state report is included in the SN for N number of PDU that the data sending entity after data PDU is sent.
Further, the first state report is carried in data PDU,
The first state report includes data PDU SN and in data PDU foregoing description data sending entities
Send N number of PDU SN relative to data PDU SN deviant；And/or
The first state report includes data PDU SN and the data sending entity after data PDU
Send N number of PDU SN relative to data PDU SN deviant.
Further, after the transmission first state report to the data receiver entity, methods described also includes：
The second state report that the data receiver entity is sent is received, the number is carried in second state report
The SN for the loss PDU not being properly received according to sending entity transmission but data receiver entity information；
The loss PDU is sent to the data receiver entity according to the information of SN in second state report again.
The embodiment of the present invention additionally provides a kind of data transmission method, applied to the data receiver entity in 5G networks, institute
The method of stating includes：
The first state report that data sending entity is sent is received, the data hair is carried in the first state report
Entity is sent to send the SN of PDU to data receiver entity information；
Judging that the PDU of the data sending entity transmission and the data receiver entity are correct according to the information of the SN
When the PDU of reception is inconsistent, the second state report is sent to the data sending entity, is carried in second state report
The SN for the loss PDU that the data sending entity is sent but the data receiver entity is not properly received information.
Further, methods described also includes：
Judging that the PDU of the data sending entity transmission and the data receiver entity are correct according to the information of the SN
When the PDU of reception is consistent, the packet for the order having correctly received is submitted to high level, the packet is that the data receiver is real
Body obtains after handling the PDU received, and the SN that the lower boundary of movably receiving window is submitted to the last time to high level
Next SN.
The embodiment of the present invention additionally provides a kind of data transmission device, applied to the data sending entity in 5G networks, institute
Stating device includes：
Logging modle, for after PDU is sent to data receiver entity, recording transmitted PDU SN；
Sending module, for sending first state report to the data receiver entity, taken in the first state report
Information with the SN.
Further, the sending module is specifically used for sending to the data receiver entity according to the default transmission cycle
The first state report；Or
The first state is sent when meeting preparatory condition to the data receiver entity to report.
Further, the preparatory condition includes：
It is upper once send first state report after, the data sending entity to data receiver entity send PDU number
Amount reaches N；Or
It is upper once send first state report after, the data sending entity to data receiver entity send PDU it is total
Byte number reaches M；Or
When satisfaction inquires after trigger condition；
Wherein, M, N are the integer not less than 1.
Further, the first state is reported as independent PDU, and the PDU of the first state report includes PDU payloads
With corresponding PDU heads.
Further, the PDU of first state report length is fixed；Or
The PDU of first state report length be it is unfixed, the first state report include SN information with
And identified correspondingly with SN information, other SN letter after the information of the corresponding SN of mark instruction whether also be present
Breath.
Further, the content of the PDU payloads includes：
Between at the time of report at the time of last time sends first state report to currently transmitted first state, the data
The SN for all PDU that sending entity is sent information.
Further, the information of the SN in first state report for it is last send first state report at the time of to
Between at the time of currently transmitted first state report, the SN for all PDU that the data sending entity is sent；Or
Between at the time of report at the time of last time sends first state report to currently transmitted first state, the data
Sending entity send all PDU in a PDU SN and other PDU relative to the SN of the PDU or SN previous SN
Deviant；Or
Between at the time of report at the time of last time sends first state report to currently transmitted first state, the data
The maximum S/N included in the first state report that the SN for all PDU that sending entity is sent is sent relative to the last time or the SN
Previous SN deviant.
Further, the first state report is carried in data PDU,
The first state report is included in N number of PDU of data PDU foregoing description data sending entity transmission SN；
And/or
First state report is included in the SN for N number of PDU that the data sending entity after data PDU is sent.
Further, the first state report is carried in data PDU,
The first state report includes data PDU SN and in data PDU foregoing description data sending entities
Send N number of PDU SN relative to data PDU SN deviant；And/or
The first state report includes data PDU SN and the data sending entity after data PDU
Send N number of PDU SN relative to data PDU SN deviant.
Further, described device also includes：
First receiving module, the second state report sent for receiving the data receiver entity, second state
The SN for the loss PDU that the data sending entity is sent but the data receiver entity is not properly received letter is carried in report
Breath；
Module is retransmitted, for being sent again to the data receiver entity according to the information of SN in second state report
The loss PDU.
The embodiment of the present invention additionally provides a kind of data transmission device, applied to the data receiver entity in 5G networks, institute
Stating device includes：
Second receiving module, for receiving the first state report of data sending entity transmission, the first state report
In carry the information that the data sending entity sends the SN of PDU to the data receiver entity；
Feedback module, for judging the PDU of the data sending entity transmission and the number according to the information of the SN
When the PDU being properly received according to receiving entity is inconsistent, the second state report, second shape are sent to the data sending entity
Carry the SN's for the loss PDU that the data sending entity is sent but the data receiver entity is not properly received in state report
Information.
Further, described device also includes：
Module is submitted, for judging the PDU of the data sending entity transmission and the number according to the information of the SN
When the PDU being properly received according to receiving entity is consistent, the packet for the order having correctly received is submitted to high level, the packet is
The data receiver entity obtains after handling the PDU received, and the lower boundary of movably receiving window to the last time
The SN submitted to high level next SN.
Embodiments of the invention have the advantages that：
In such scheme, data sending entity records transmitted PDU SN after PDU is sent to data receiver entity,
And the first state that the information for carrying SN is sent to data receiver entity is reported, received by the first state data reporting real
Body can determine which PDU is that data sending entity is sent but the loss PDU that is not properly received of data receiver entity, and by these
The feedback of the information for losing PDU SN gives data sending entity, so that data sending entity resends these PDU, and then causes
Data being capable of normal transmission.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the data transmission method of the embodiment of the present invention one；
Fig. 2 is the structured flowchart of the data transmission device of the embodiment of the present invention two；
Fig. 3 is the schematic flow sheet of the data transmission method of the embodiment of the present invention three；
Fig. 4 is the structured flowchart of the data transmission device of the embodiment of the present invention four；
Fig. 5 is the configuration diagram of 5G networks；
Fig. 6 is the schematic flow sheet of the data transmission method of the embodiment of the present invention five；
Fig. 7 is the PDU of status report of embodiment of the present invention form schematic diagram；
Fig. 8 is the schematic flow sheet of the data transmission method of the embodiment of the present invention six.
Embodiment
To make embodiments of the invention technical problems to be solved, technical scheme and advantage clearer, below in conjunction with
Drawings and the specific embodiments are described in detail.
Embodiments of the invention are directed under existing 5G network Ns R individual layer SN structures, can not be entered for multi-link separation carrying
The problem of row HARQ, there is provided a kind of data transmission method and device, can solve the problem that under NR individual layer SN structures, for more
The problem of separation carrying of connection can not carry out HARQ so that data normal transmission.
Embodiment one
The present embodiment provides a kind of data transmission method, applied to the data sending entity in 5G networks, as shown in figure 1,
Methods described includes：
Step 101：After PDU (protocol Data Unit) is sent to data receiver entity, transmitted PDU SN is recorded；
Step 102：First state report is sent to the data receiver entity, is carried in the first state report
State SN information.
In the present embodiment, data sending entity records transmitted PDU SN after PDU is sent to data receiver entity,
And the first state that the information for carrying SN is sent to data receiver entity is reported, received by the first state data reporting real
Body can determine which PDU is that data sending entity is sent but the loss PDU that is not properly received of data receiver entity, and by these
The feedback of the information for losing PDU SN gives data sending entity, so that data sending entity resends these PDU, and then causes
Data being capable of normal transmission.
Further, it is described to include to data receiver entity transmission first state report：
The first state is sent according to the default transmission cycle to the data receiver entity to report；Or
The first state is sent when meeting preparatory condition to the data receiver entity to report.
Further, the preparatory condition includes：
It is upper once send first state report after, the data sending entity to data receiver entity send PDU number
Amount reaches N；Or
It is upper once send first state report after, the data sending entity to data receiver entity send PDU it is total
Byte number reaches M；Or
When satisfaction inquires after trigger condition；
Wherein, M, N are the integer not less than 1.
In LTE (Long Term Evolution) system, for RLC (radio link layer control protocol) AM (Acknowledge mode,
Affirmation mode) data transfer, RLC AM sending entities can be by inquiring after (Poll) process triggering RLC AM receiving entities to RLC
AM sending entity status reports.RLC AM sending entities update according to state report sends window or progress RLC re-transmissions
Operation.Trigger condition of inquiring after under LTE RLC AM patterns has the following two kinds：
A, carry out inquiring after triggering based on PDU number or PDU byte numbers
The trigger mechanism can configure, once it is high-rise be configured with based on PDU number or PDU byte numbers inquire after it is tactile
Hair mechanism, then transmitting terminal concrete operations are as follows：
As the newly-generated PDU of RLC AM entities, then：
Poll PDU number plus 1, i.e. PDU_WITHOUT_POLL=PDU_WITHOUT_POLL+1 are not carried out；
Poll byte numbers (BYTE_WITHOUT_POLL) are not carried out according to the newly-generated PDU data fields included
Byte numbers are updated；
If PDU_WITHOUT_POLL>=poolPDU；Or if BYTE_WITHOUT_POLL>=poolByte；
Poll bits are carried when organizing RLC data PDU.
B, carry out inquiring after triggering based on last PDU in transmission caching or re-transmission caching
When last PDU for sending caching or re-transmission caching is transmitted, it is necessary to carry explicit state report
Request instruction inquires after mark, is undetectable, to ensure such number otherwise once the situation that last PDU loses occurs
According to Successful transmissions, " transmission of final data in caching " is inquires after one of condition of triggering.
In the present embodiment inquire after trigger condition with LTE system to inquire after trigger condition similar.
Further, the first state is reported as independent PDU, and the PDU of the first state report includes PDU payloads
With corresponding PDU heads.
Further, the PDU of first state report length is fixed；Or
The PDU of first state report length be it is unfixed, the first state report include SN information with
And identified correspondingly with SN information, other SN letter after the information of the corresponding SN of mark instruction whether also be present
Breath.
Further, the content of the PDU payloads includes：
Between at the time of report at the time of last time sends first state report to currently transmitted first state, the data
The SN for all PDU that sending entity is sent information.
Further, the information of the SN in first state report for it is last send first state report at the time of to
Between at the time of currently transmitted first state report, the SN for all PDU that the data sending entity is sent；Or
Between at the time of report at the time of last time sends first state report to currently transmitted first state, the data
Sending entity send all PDU in a PDU SN and other PDU relative to the SN of the PDU or SN previous SN
Deviant；Or
Between at the time of report at the time of last time sends first state report to currently transmitted first state, the data
The maximum S/N included in the first state report that the SN for all PDU that sending entity is sent is sent relative to the last time or the SN
Previous SN deviant.
Further, the first state report is carried in data PDU,
The first state report is included in N number of PDU of data PDU foregoing description data sending entity transmission SN；
And/or
First state report is included in the SN for N number of PDU that the data sending entity after data PDU is sent.
Further, the first state report is carried in data PDU,
The first state report includes data PDU SN and in data PDU foregoing description data sending entities
Send N number of PDU SN relative to data PDU SN deviant；And/or
The first state report includes data PDU SN and the data sending entity after data PDU
Send N number of PDU SN relative to data PDU SN deviant.
Further, after the transmission first state report to the data receiver entity, methods described also includes：
The second state report that the data receiver entity is sent is received, the number is carried in second state report
The SN for the loss PDU not being properly received according to sending entity transmission but data receiver entity information；
The loss PDU is sent to the data receiver entity according to the information of SN in second state report again.
Embodiment two
A kind of data transmission device is present embodiments provided, applied to the data sending entity in 5G networks, such as Fig. 2 institutes
Show, described device includes：
Logging modle 21, for after PDU is sent to data receiver entity, recording transmitted PDU SN；
Sending module 22, for sending first state report to the data receiver entity, in the first state report
Carry the information of the SN.
In the present embodiment, data sending entity records transmitted PDU SN after PDU is sent to data receiver entity,
And the first state that the information for carrying SN is sent to data receiver entity is reported, received by the first state data reporting real
Body can determine which PDU is that data sending entity is sent but the loss PDU that is not properly received of data receiver entity, and by these
The feedback of the information for losing PDU SN gives data sending entity, so that data sending entity resends these PDU, and then causes
Data being capable of normal transmission.
Further, the sending module is specifically used for sending to the data receiver entity according to the default transmission cycle
The first state report；Or
The first state is sent when meeting preparatory condition to the data receiver entity to report.
Further, the preparatory condition includes：
It is upper once send first state report after, the data sending entity to data receiver entity send PDU number
Amount reaches N；Or
It is upper once send first state report after, the data sending entity to data receiver entity send PDU it is total
Byte number reaches M；Or
When satisfaction inquires after trigger condition；
Wherein, M, N are the integer not less than 1.
Further, the first state is reported as independent PDU, and the PDU of the first state report includes PDU payloads
With corresponding PDU heads.
Further, the PDU of first state report length is fixed；Or
The PDU of first state report length be it is unfixed, the first state report include SN information with
And identified correspondingly with SN information, other SN letter after the information of the corresponding SN of mark instruction whether also be present
Breath.
Further, the content of the PDU payloads includes：
Between at the time of report at the time of last time sends first state report to currently transmitted first state, the data
The SN for all PDU that sending entity is sent information.
Further, the information of the SN in first state report for it is last send first state report at the time of to
Between at the time of currently transmitted first state report, the SN for all PDU that the data sending entity is sent；Or
Between at the time of report at the time of last time sends first state report to currently transmitted first state, the data
Sending entity send all PDU in a PDU SN and other PDU relative to the SN of the PDU or SN previous SN
Deviant；Or
Between at the time of report at the time of last time sends first state report to currently transmitted first state, the data
The maximum S/N included in the first state report that the SN for all PDU that sending entity is sent is sent relative to the last time or the SN
Previous SN deviant.
Further, the first state report is carried in data PDU,
The first state report is included in N number of PDU of data PDU foregoing description data sending entity transmission SN；
And/or
First state report is included in the SN for N number of PDU that the data sending entity after data PDU is sent.
Further, the first state report is carried in data PDU,
The first state report includes data PDU SN and in data PDU foregoing description data sending entities
Send N number of PDU SN relative to data PDU SN deviant；And/or
The first state report includes data PDU SN and the data sending entity after data PDU
Send N number of PDU SN relative to data PDU SN deviant.
Further, described device also includes：
First receiving module 23, the second state report sent for receiving the data receiver entity, second shape
Carry the SN's for the loss PDU that the data sending entity is sent but the data receiver entity is not properly received in state report
Information；
Module 24 is retransmitted, for being sent out again to the data receiver entity according to the information of SN in second state report
Send the loss PDU.
Embodiment three
A kind of data transmission method is present embodiments provided, applied to the data receiver entity in 5G networks, such as Fig. 3 institutes
Show, methods described includes：
Step 301：The first state report that data sending entity is sent is received, is carried in the first state report
State the information that data sending entity sends the SN of PDU to the data receiver entity；
Step 302：The PDU of the data sending entity transmission and the data receiver are being judged according to the information of the SN
When the PDU that entity is properly received is inconsistent, the second state report, second state report are sent to the data sending entity
In carry the loss PDU that the data sending entity is sent but the data receiver entity is not properly received SN information.
In the present embodiment, data sending entity records transmitted PDU SN after PDU is sent to data receiver entity,
And the first state that the information for carrying SN is sent to data receiver entity is reported, received by the first state data reporting real
Body can determine which PDU is that data sending entity is sent but the loss PDU that is not properly received of data receiver entity, and by these
The feedback of the information for losing PDU SN gives data sending entity, so that data sending entity resends these PDU, and then causes
Data being capable of normal transmission.
Further, methods described also includes：
Judging that the PDU of the data sending entity transmission and the data receiver entity are correct according to the information of the SN
When the PDU of reception is consistent, the packet for the order having correctly received is submitted to high level, the packet is that the data receiver is real
Body obtains after handling the PDU received, and the SN that the lower boundary of movably receiving window is submitted to the last time to high level
Next SN.
Example IV
A kind of data transmission device is present embodiments provided, applied to the data receiver entity in 5G networks, such as Fig. 4 institutes
Show, described device includes：
Second receiving module 41, for receiving the first state report of data sending entity transmission, the first state report
The information that the data sending entity sends the SN of PDU to the data receiver entity is carried in announcement；
Feedback module 42, for according to the information of the SN judge PDU that the data sending entity sends with it is described
When the PDU that data receiver entity is properly received is inconsistent, to the data sending entity send the second state report, described second
The SN for the loss PDU that the data sending entity is sent but the data receiver entity is not properly received is carried in state report
Information.
In the present embodiment, data sending entity records transmitted PDU SN after PDU is sent to data receiver entity,
And the first state that the information for carrying SN is sent to data receiver entity is reported, received by the first state data reporting real
Body can determine which PDU is that data sending entity is sent but the loss PDU that is not properly received of data receiver entity, and by these
The feedback of the information for losing PDU SN gives data sending entity, so that data sending entity resends these PDU, and then causes
Data being capable of normal transmission.
Further, described device also includes：
Submit module 43, for according to the information of the SN judge PDU that the data sending entity sends with it is described
When the PDU that data receiver entity is properly received is consistent, the packet for the order having correctly received, the packet are submitted to high level
Obtained after being handled for the data receiver entity the PDU received, and the lower boundary of movably receiving window is to nearest one
The secondary SN submitted to high level next SN.
NR systems in 5G networks, in order to save expense, it is therefore possible to use individual layer SN, the SN are by NR air protocol stack user planes
Highest Layer assignment.As shown in figure 5, SN is distributed before ROHC (head compression).If as shown in figure 5, a carrying (RB) is only logical
Cross leg (connection) transmission, then be exactly single connection transmission (such as RB1 in Fig. 5)；If one be carried through it is multiple
Leg transmission is exactly multi-link transmission (such as RB2 in Fig. 5).
It is whether identical according to the SN transmitted in each connection for the carrying by multi-link transmission, it is divided into two kinds of feelings again
Condition：
Situation 1：Duplication bearer (repeat carry), i.e., by different leg transmit be identical SN data
Bag.
Situation 2：Split bearer (separation carrying), i.e., by different leg transmit be different SN packet.
If NR only supports individual layer SN, SN can be in NR user plane highest Layer assignments, then in the case of multi-link
Split bearer, the PDU transmitted by different leg (protocol Data Unit) SN numberings are discontinuous.Data receiver is real
Body carries out just determining that some SN is in transmitting procedure during ARQ state reports after receiving the data of data sending entity transmission
Lose or data sending entity corresponding to the connection does not just send PDU corresponding to the SN at all.If in ARQ state reports
Comprising SN be data sending entity at all just without send PDU SN, then data receiver entity reception window will nothing
Method moves, and receives window and stagnates, data can not normal transmission.
In order to solve the above problems, the present invention provides a kind of data transmission method, has redefined a new transmission shape
State report (i.e. above-mentioned first state report), data sending entity after PDU is sent to data receiver entity, record transmitted by
PDU SN, and the status report for carrying SN information is sent to data receiver entity, pass through the status report data
Receiving entity can determine which PDU is the loss PDU that data sending entity is sent but data receiver entity is not properly received, and
These loss PDU SN information is fed back into data sending entity by ARQ state reports (i.e. above-mentioned second state report), with
Just data sending entity resends these PDU, and then enables data to normal transmission.
Technical scheme is described further with reference to specific embodiment：
Embodiment five
As shown in fig. 6, the data transmission method of the present embodiment specifically includes following steps：
Step 601：Data sending entity sends PDU to data receiver entity, and records the PDU of transmission SN；
Step 602：Data sending entity sends status report by independent PDU to data receiver entity, sends
The SN for the PDU that data sending entity is sent to data receiver entity information is carried in state report；
The trigger condition of status report can be but not limited to periodic triggers and event triggering.
It is that data sending entity sends shape according to preset time period to data receiver entity for periodic triggers
State is reported, specifically, can set a timer, and after timer timing, data sending entity is to data receiver entity
Status report is sent, the length of timer can be configured by signaling under high level.
Triggered for event, trigger condition can be including but not limited to：
It is upper once send status report after, data sending entity to data receiver entity send PDU quantity reach
To N, N is the integer more than 0, and N value can be configured by high level；
It is upper once send status report after, data sending entity to data receiver entity send PDU total byte
Number reaches M, and M is the integer more than 0, and M value can be configured by high level；
When satisfaction inquires after trigger condition.
The PDU as independence of status report is sent to data receiver entity by data sending entity.Transmission state
The PDU of report includes two parts：PDU payloads and corresponding PDU header (head).
The PDU of status report length can be it is fixed can also be unfixed.In status report
PDU length for it is fixed when, include fixed number SN or SN deviant in the PDU of status report.Sending shape
When the PDU of state report length is unfixed, not only include SN or SN deviants in the status report, in addition to
Identified correspondingly with SN or SN deviants, can indicate whether gone back after corresponding SN or SN deviants by the mark
In the presence of other SN or SN deviants.
The content that the PDU payloads of status report are included can be but not limited to：Last time sends transmission state report
At the time of announcement between at the time of currently transmitted status report, data sending entity sends owning to data receiver entity
PDU SN information, i.e., next SN of the maximum S/N that last status report includes to current status report
All SN information between SN corresponding to transmission time.
The form of expression of SN information can be but not limited to following several in status report：
All SN information in status report are all identified with SN；
First SN information is identified with SN in status report, and other SN information are with relative to first SN or preceding
One SN deviant identifies；
All SN information are all identified with deviant in status report, and first SN deviant is relative to the last time
The SN maximums or the previous SN of SN maximums deviant included in status report, if data receiver before
Entity was not received by status report, then acquiescence is the deviant relative to SN=0.
Assuming that status report length is fixed, i.e., each status report is only capable of the SN's comprising fixed number
Information, such as 5.Each SN information is identified with deviant in status report, then in an embodiment, is sent
The form of state report as shown in fig. 7, wherein deltai identifies deviants of the SN relative to its previous SN, i values are 1,
2nd, 3,4 and 5.D/C and CPT composition PDU heads, it is status report PDU or data PDU, CPT mark control that D/C, which identifies the PDU,
PDU processed type, for example define CPT and take some particular value, for example be status report corresponding to the PDU when 111.
Step 603：SN of the data receiver entity in the status report received information judges that data are sent
Whether the PDU that entity is sent and the PDU that data receiver entity is properly received are consistent, if inconsistent, turn to step 604；If
Unanimously, step 606 is turned to；
Step 604：When the PDU that the PDU and data receiver entity sent in data sending entity is properly received is inconsistent, number
According to receiving entity ARQ state reports are fed back to data sending entity；
After data receiver entity receives the status report of data sending entity transmission, according in status report
SN information determine to need the SN indicated information in ARQ state reports, i.e., only data sending entity is transmitted across but number
The SN being not properly received according to receiving entity carries out ARQ state report feedbacks, the SN not sent at all for data sending entity
Fed back without ARQ state reports；
Step 605：Data sending entity is sent to data receiver entity again according to the information of SN in ARQ state reports
PDU。
Step 606：When the PDU that data sending entity is sent is consistent with the PDU that data receiver entity is properly received, data
Receiving entity submits the packet received and movably receiving window to high level.
As long as the PDU orders in PDU and data sending entity status report that data receiver entity has correctly received
Unanimously, it is continuously to receive to be considered as data receiver entity, and the packet for the order having correctly received, data receiver are submitted to high level
After entity receives PDU, PDU is parsed and removes packet header obtain packet, and the lower boundary of movably receiving window is to most
The nearly SN once submitted to high level next SN.
In the present embodiment, data sending entity records transmitted PDU SN after PDU is sent to data receiver entity,
And these SN information is sent to data receiver entity, so that data receiver entity can determine which PDU is that data are sent in fact
The loss PDU that body is sent but data receiver entity is not properly received, and these loss PDU SN feedback of the information is sent out to data
Entity is sent, so that data sending entity resends these PDU, and then enables data to normal transmission.
Embodiment six
As shown in figure 8, the data transmission method of the present embodiment specifically includes following steps：
Step 801：Data sending entity sends PDU to data receiver entity, and records the PDU of transmission SN；
Step 802：Data sending entity carries status report in the data PDU of transmission, in status report
Carry the SN for the PDU that data sending entity is sent to data receiver entity information；
The trigger condition of status report can be but not limited to periodic triggers and event triggering.
It is that data sending entity sends shape according to preset time period to data receiver entity for periodic triggers
State is reported, specifically, can set a timer, and after timer timing, data sending entity is to data receiver entity
Status report is sent, the length of timer can be configured by signaling under high level.
Triggered for event, trigger condition can be including but not limited to：
It is upper once send status report after, data sending entity to data receiver entity send PDU quantity reach
To N, N is the integer more than 0, and N value can be configured by high level；
It is upper once send status report after, data sending entity to data receiver entity send PDU total byte
Number reaches M, and M is the integer more than 0, and M value can be configured by high level；
When satisfaction inquires after trigger condition.
The form of expression of SN information can be but not limited to SN or SN deviants in status report.
In status report SN information by SN to identify when, be included in data PDU in status report
The SN for N number of PDU that data sending entity is sent before (PDU for carrying status report)；And/or status report bag
Include the SN of N number of PDU that data sending entity is sent after data PDU.
In status report SN information by SN deviants to identify when, status report includes the data
PDU (PDU for carrying status report) SN and N number of PDU of data sending entity transmission before data PDU
SN relative to data PDU SN deviant；And/or status report includes data PDU SN and in the data
After PDU data sending entity send N number of PDU SN relative to data PDU SN deviant.
Step 803：SN of the data receiver entity in the status report received information judges that data are sent
Whether the PDU that entity is sent and the PDU that data receiver entity is properly received are consistent, if inconsistent, turn to step 804；If
Unanimously, step 806 is turned to；
Step 804：When the PDU that the PDU and data receiver entity sent in data sending entity is properly received is inconsistent, number
According to receiving entity ARQ state reports are fed back to data sending entity；
After data receiver entity receives the status report of data sending entity transmission, according in status report
SN information determine to need the SN indicated information in ARQ state reports, i.e., only data sending entity is transmitted across but number
The SN being not properly received according to receiving entity carries out ARQ state report feedbacks, the SN not sent at all for data sending entity
Fed back without ARQ state reports；
Step 805：Data sending entity is sent to data receiver entity again according to the information of SN in ARQ state reports
PDU。
Step 806：When the PDU that data sending entity is sent is consistent with the PDU that data receiver entity is properly received, data
Receiving entity submits the PDU received and movably receiving window to high level.
As long as the PDU orders in PDU and data sending entity status report that data receiver entity has correctly received
Unanimously, it is continuously to receive to be considered as data receiver entity, and data receiver entity can submit the order having correctly received to high level
Packet, after data receiver entity receives PDU, PDU parsed and removes packet header obtain packet, and mobile received
The next SN for the SN that the lower boundary of window is submitted to the last time to high level.
In the present embodiment, data sending entity records transmitted PDU SN after PDU is sent to data receiver entity,
And these SN information is sent to data receiver entity, so that data receiver entity can determine which PDU is that data are sent in fact
The loss PDU that body is sent but data receiver entity is not properly received, and these loss PDU SN feedback of the information is sent out to data
Entity is sent, so that data sending entity resends these PDU, and then enables data to normal transmission.
It should be noted that the device that second, four embodiments of the invention provide is can to correspond to realize that the above method is implemented
The device for the data transmission method that example provides, therefore all embodiments based on data transmission method that above method embodiment provides
Can be to should apply to the second, fourth embodiment, and can reach same or analogous beneficial effect.
In several embodiments provided herein, it should be understood that disclosed method and apparatus, can be by other
Mode realize.For example, device embodiment described above is only schematical, for example, the division of the unit, only
For a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple units or component can combine
Or another system is desirably integrated into, or some features can be ignored, or do not perform.Another, shown or discussed phase
Coupling or direct-coupling or communication connection between mutually can be by some interfaces, the INDIRECT COUPLING or communication of device or unit
Connection, can be electrical, mechanical or other forms.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That the independent physics of unit includes, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in one and computer-readable deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are causing a computer
Equipment (can be personal computer, server, or network equipment etc.) performs receiving/transmission method described in each embodiment of the present invention
Part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (Read-Only Memory, abbreviation
ROM), random access memory (Random Access Memory, abbreviation RAM), magnetic disc or CD etc. are various to store
The medium of program code.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (24)
- A kind of 1. data transmission method, applied to the data sending entity in 5G networks, it is characterised in that methods described includes：After PDU is sent to data receiver entity, transmitted PDU SN is recorded；First state report is sent to the data receiver entity, the information of the SN is carried in the first state report.
- 2. data transmission method according to claim 1, it is characterised in that described to send the to the data receiver entity One state report includes：The first state is sent according to the default transmission cycle to the data receiver entity to report；OrThe first state is sent when meeting preparatory condition to the data receiver entity to report.
- 3. data transmission method according to claim 2, it is characterised in that the preparatory condition includes：It is upper once send first state report after, the data sending entity to data receiver entity send PDU quantity reach To N；OrIt is upper once send first state report after, the data sending entity to data receiver entity send PDU total byte Number reaches M；OrWhen satisfaction inquires after trigger condition；Wherein, M, N are the integer not less than 1.
- 4. data transmission method according to claim 1, it is characterised in that the first state is reported as independent PDU, The PDU of the first state report includes PDU payloads and corresponding PDU heads.
- 5. data transmission method according to claim 4, it is characterised in thatThe PDU of first state report length is fixed；OrThe PDU of first state report length be it is unfixed, the first state report include SN information and with SN information identifies correspondingly, other SN information after the information of the corresponding SN of mark instruction whether also be present.
- 6. data transmission method according to claim 4, it is characterised in that the content of the PDU payloads includes：Between at the time of report at the time of last time sends first state report to currently transmitted first state, the data are sent The SN for all PDU that entity is sent information.
- 7. data transmission method according to claim 6, it is characterised in thatThe information of SN in the first state report is sent at the time of first state is reported to currently transmitted first to be last Between at the time of state report, the SN for all PDU that the data sending entity is sent；OrBetween at the time of report at the time of last time sends first state report to currently transmitted first state, the data are sent PDU SN and other PDU is relative to the inclined of the SN of the PDU or SN previous SN in all PDU that entity is sent Shifting value；OrBetween at the time of report at the time of last time sends first state report to currently transmitted first state, the data are sent Before the SN for all PDU that entity is sent is relative to the maximum S/N or the SN included in the first state report of last time transmission One SN deviant.
- 8. data transmission method according to claim 1, it is characterised in that the first state report is carried in data In PDU,The first state report is included in N number of PDU of data PDU foregoing description data sending entity transmission SN；And/orFirst state report is included in the SN for N number of PDU that the data sending entity after data PDU is sent.
- 9. data transmission method according to claim 1, it is characterised in that the first state report is carried in data In PDU,The first state report includes data PDU SN and sent in data PDU foregoing description data sending entity N number of PDU SN relative to data PDU SN deviant；And/orThe first state report includes data PDU SN and the data sending entity is sent after data PDU N number of PDU SN relative to data PDU SN deviant.
- 10. according to the data transmission method any one of claim 1-9, it is characterised in that described to be connect to the data After receiving entity transmission first state report, methods described also includes：The second state report that the data receiver entity is sent is received, the data hair is carried in second state report Send the SN for the loss PDU that entity is sent but the data receiver entity is not properly received information；The loss PDU is sent to the data receiver entity according to the information of SN in second state report again.
- 11. a kind of data transmission method, it is characterised in that applied to the data receiver entity in 5G networks, methods described includes：The first state report that data sending entity is sent is received, it is real to carry the data transmission in the first state report Body sends the SN of the PDU to data receiver entity information；Judging that the PDU that the data sending entity is sent is properly received with the data receiver entity according to the information of the SN PDU it is inconsistent when, send the second state report to the data sending entity, carry in second state report described The SN for the loss PDU that data sending entity is sent but the data receiver entity is not properly received information.
- 12. data transmission method according to claim 11, it is characterised in that methods described also includes：Judging that the PDU that the data sending entity is sent is properly received with the data receiver entity according to the information of the SN PDU it is consistent when, the packet for the order having correctly received is submitted to high level, the packet is the data receiver entity pair The PDU received is obtained after being handled, and the lower boundary of movably receiving window is under the SN that is submitted to high level of the last time One SN.
- A kind of 13. data transmission device, applied to the data sending entity in 5G networks, it is characterised in that described device includes：Logging modle, for after PDU is sent to data receiver entity, recording transmitted PDU SN；Sending module, for sending first state report to the data receiver entity, carried in the first state report The information of the SN.
- 14. data transmission device according to claim 13, it is characterised in thatThe sending module is specifically used for sending the first state to the data receiver entity according to the default transmission cycle Report；OrThe first state is sent when meeting preparatory condition to the data receiver entity to report.
- 15. data transmission device according to claim 14, it is characterised in that the preparatory condition includes：It is upper once send first state report after, the data sending entity to data receiver entity send PDU quantity reach To N；OrIt is upper once send first state report after, the data sending entity to data receiver entity send PDU total byte Number reaches M；OrWhen satisfaction inquires after trigger condition；Wherein, M, N are the integer not less than 1.
- 16. data transmission device according to claim 13, it is characterised in that the first state is reported as independent PDU, the PDU of the first state report include PDU payloads and corresponding PDU heads.
- 17. data transmission device according to claim 16, it is characterised in thatThe PDU of first state report length is fixed；OrThe PDU of first state report length be it is unfixed, the first state report include SN information and with SN information identifies correspondingly, other SN information after the information of the corresponding SN of mark instruction whether also be present.
- 18. data transmission device according to claim 16, it is characterised in that the content of the PDU payloads includes：Between at the time of report at the time of last time sends first state report to currently transmitted first state, the data are sent The SN for all PDU that entity is sent information.
- 19. data transmission device according to claim 18, it is characterised in thatThe information of SN in the first state report is sent at the time of first state is reported to currently transmitted first to be last Between at the time of state report, the SN for all PDU that the data sending entity is sent；OrBetween at the time of report at the time of last time sends first state report to currently transmitted first state, the data are sent PDU SN and other PDU is relative to the inclined of the SN of the PDU or SN previous SN in all PDU that entity is sent Shifting value；OrBetween at the time of report at the time of last time sends first state report to currently transmitted first state, the data are sent Before the SN for all PDU that entity is sent is relative to the maximum S/N or the SN included in the first state report of last time transmission One SN deviant.
- 20. data transmission device according to claim 13, it is characterised in that the first state report is carried in data In PDU,The first state report is included in N number of PDU of data PDU foregoing description data sending entity transmission SN；And/orFirst state report is included in the SN for N number of PDU that the data sending entity after data PDU is sent.
- 21. data transmission device according to claim 13, it is characterised in that the first state report is carried in data In PDU,The first state report includes data PDU SN and sent in data PDU foregoing description data sending entity N number of PDU SN relative to data PDU SN deviant；And/orThe first state report includes data PDU SN and the data sending entity is sent after data PDU N number of PDU SN relative to data PDU SN deviant.
- 22. according to the data transmission device any one of claim 13-21, it is characterised in that described device also includes：First receiving module, the second state report sent for receiving the data receiver entity, second state report In carry the loss PDU that the data sending entity is sent but the data receiver entity is not properly received SN information；Module is retransmitted, described in being sent again to the data receiver entity according to the information of SN in second state report Lose PDU.
- 23. a kind of data transmission device, it is characterised in that applied to the data receiver entity in 5G networks, described device includes：Second receiving module, for receiving the first state report of data sending entity transmission, taken in the first state report The SN of the PDU to data receiver entity information is sent with the data sending entity；Feedback module, for judging that the PDU that the data sending entity is sent connects with the data according to the information of the SN When the PDU that receipts entity is properly received is inconsistent, the second state report, the second state report are sent to the data sending entity The SN for the loss PDU that the data sending entity is sent but the data receiver entity is not properly received letter is carried in announcement Breath.
- 24. data transmission device according to claim 23, it is characterised in that described device also includes：Module is submitted, for judging that the PDU that the data sending entity is sent connects with the data according to the information of the SN When the PDU that receipts entity is properly received is consistent, the packet for the order having correctly received is submitted to high level, the packet is described Data receiver entity obtains after handling the PDU received, and the lower boundary of movably receiving window is to the last to height The next SN for the SN that layer is submitted.
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