CN109327289B - Data packet retransmission method and device - Google Patents

Data packet retransmission method and device Download PDF

Info

Publication number
CN109327289B
CN109327289B CN201710637099.XA CN201710637099A CN109327289B CN 109327289 B CN109327289 B CN 109327289B CN 201710637099 A CN201710637099 A CN 201710637099A CN 109327289 B CN109327289 B CN 109327289B
Authority
CN
China
Prior art keywords
scheduling
data packet
message
carrier
preset threshold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201710637099.XA
Other languages
Chinese (zh)
Other versions
CN109327289A (en
Inventor
张月宾
安思麒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Potevio Information Technology Co Ltd
Original Assignee
Potevio Information Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Potevio Information Technology Co Ltd filed Critical Potevio Information Technology Co Ltd
Priority to CN201710637099.XA priority Critical patent/CN109327289B/en
Publication of CN109327289A publication Critical patent/CN109327289A/en
Application granted granted Critical
Publication of CN109327289B publication Critical patent/CN109327289B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • 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
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • 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
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/203—Details of error rate determination, e.g. BER, FER or WER
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers

Abstract

The application provides a data packet retransmission method, which is applied to a carrier aggregation scene and adopts an AM mode to transmit data in an RLC layer, and is characterized by comprising the following steps: step A, when a sending end RLC layer receives a scheduling result message of an MAC layer, determining whether a retransmission data packet exists or not; if yes, executing step B; otherwise, executing step D; b, determining whether the transmission error rate of the scheduling carrier in the scheduling result message is less than a first preset threshold value, and if so, executing the step C; otherwise, executing step D; step C, retransmission data packet transmission is carried out on the carrier wave corresponding to the scheduling message; ending the flow; and D, the sending end RLC layer sends data except the retransmission data packet to be transmitted on the carrier wave corresponding to the scheduling message. Based on the same inventive concept, the invention also provides a data packet retransmission device, which can improve the retransmission success rate and the system service transmission efficiency.

Description

Data packet retransmission method and device
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for retransmitting a data packet.
Background
Under a carrier aggregation scene, one Radio Link Control (RLC) entity corresponds to a plurality of Media Access Control (MAC) entities, an RLC layer performs undifferentiated Data transmission on scheduling results of a plurality of component carriers of the MAC layer, and randomly performs retransmission of RLC Protocol Data Units (PDUs) when channel quality of part of the component carriers is relatively poor, so that system service transmission efficiency is low.
In a carrier aggregation scene, an RLC layer performs undifferentiated data transmission on a multi-carrier scheduling result of an MAC layer, channel quality, user scheduling conditions and the like of a plurality of member carriers where a CA user is located are different in an actual scene, the size of an RLC PDU transmitted by each member carrier is greatly different, a retransmission PDU with a larger size needs to generate and maintain more segmented retransmission information when a member carrier with a small scheduling size is transmitted, and processing complexity is high; when a retransmission PDU encounters a member carrier with poor channel quality and is transmitted, the probability of retransmission failure is high, the retransmission times are increased, the transmission efficiency of services is low, and the maximum retransmission times are easy to achieve.
Disclosure of Invention
In view of this, the present application provides a data packet retransmission method and apparatus, which can improve the retransmission success rate and improve the system service transmission efficiency.
In order to solve the technical problem, the technical scheme of the application is realized as follows:
a data packet retransmission method is applied to a carrier aggregation scene, and data transmission is carried out in an RLC layer by adopting an AM mode, and the method comprises the following steps: step (ii) of
A. When the sending end RLC layer receives the MAC layer scheduling result message, determining whether a retransmission data packet exists; if yes, executing step B; otherwise, executing step D;
B. determining whether the transmission error rate of the scheduling carrier in the scheduling result message is less than a first preset threshold value, if so, executing the step C; otherwise, executing step D;
C. transmitting a retransmission data packet on a carrier corresponding to the scheduling message; ending the flow;
D. and the sending end RLC layer sends data except the retransmission data packet to be transmitted on the carrier wave corresponding to the scheduling message.
After determining that the transmission error rate of the scheduling carrier in the scheduling result message is smaller than a first preset threshold in step B and before step C, the method further includes:
determining whether the MAC scheduling size in the scheduling message is larger than a second preset threshold value, if so, executing the step C; otherwise, executing step D.
After determining that the MAC scheduling size in the scheduling message is not greater than a second preset threshold value, before step D, the method further includes:
adding 1 to the current value of the limiting threshold times, and determining whether the value of the limiting threshold times after the 1 is added is larger than a third preset threshold value; if yes, executing step C; otherwise, executing step D.
When it is determined that the value of the number of times of the limitation threshold added by 1 is greater than a third preset threshold, the method further includes:
initializing a value of the limit threshold number of times.
Wherein the method further comprises:
when receiving a downlink cache query message sent by an MAC layer, an RLC layer of a sending end determines whether a carrier sending error rate corresponding to the query message is smaller than a first preset threshold value, and if so, informs the MAC layer that a retransmission data packet exists in a current data cache; otherwise, the MAC layer is informed that no retransmission data packet exists in the current data cache.
A data packet retransmission device is applied to a carrier aggregation scene, and adopts an Acknowledged Mode (AM) to transmit data in a Radio Link Control (RLC) layer, and the device comprises the following components: a receiving unit, a determining unit and a transmitting unit;
the receiving unit is used for receiving a Media Access Control (MAC) scheduling result message;
the determining unit is configured to determine whether a retransmission data packet exists when the receiving unit receives the MAC scheduling result message; whether the transmission error rate of the scheduling carrier in the scheduling result message is less than a first preset threshold value or not;
the sending unit is configured to send the retransmission data packet on the carrier corresponding to the scheduling message when the determining unit determines that no retransmission data packet exists or determines that a retransmission data packet exists and the transmission error rate of the scheduling carrier in the scheduling result message is smaller than a first preset threshold; and when the determining unit determines that the retransmission data packet exists and the transmission error rate of the scheduling carrier in the scheduling result message is not less than a first preset threshold value, transmitting data except the retransmission data packet to be transmitted on the carrier corresponding to the scheduling message.
Wherein the content of the first and second substances,
the determining unit is further configured to determine whether the MAC scheduling size in the scheduling message is greater than a second preset threshold after determining that the transmission error rate of the scheduling carrier in the scheduling result message is less than a first preset threshold;
the sending unit is further configured to send a retransmission data packet on a carrier corresponding to the scheduling message when the determining unit determines that the MAC scheduling size in the scheduling message is greater than a second preset threshold; otherwise, sending data except the retransmission data packet to be transmitted on the carrier wave corresponding to the scheduling message.
Wherein the content of the first and second substances,
the determining unit is further configured to, after determining that the MAC scheduling size in the scheduling message is not greater than a second preset threshold, add 1 to the current value of the number of times of limiting the threshold, and determine whether the value of the number of times of limiting the threshold after adding 1 is greater than a third preset threshold; if so, transmitting a retransmission data packet on a carrier wave corresponding to the scheduling message; otherwise, sending data except the retransmission data packet to be transmitted on the carrier wave corresponding to the scheduling message.
Wherein the content of the first and second substances,
the determining unit is further configured to initialize the value of the number of times of the limiting threshold when it is determined that the value of the number of times of the limiting threshold after adding 1 is greater than a third preset threshold.
Wherein the content of the first and second substances,
the receiving unit is further configured to receive a downlink cache query message sent by the MAC layer;
the determining unit is further configured to determine whether a carrier transmission error rate corresponding to the query message is smaller than a first preset threshold value when the receiving unit receives a downlink cache query message sent by the MAC layer;
the sending unit is further configured to notify the MAC layer that a retransmitted data packet exists in the current data cache when the determining unit determines that the carrier sending error rate corresponding to the query message is smaller than a first preset threshold; otherwise, the MAC layer is informed that no retransmission data packet exists in the current data cache.
According to the technical scheme, the data is sent in the RLC layer in the AM mode, and the carrier with good channel quality is preferentially selected to send in the carrier aggregation scene by combining the RLC ARQ retransmission characteristic and the carrier channel quality. The scheme can improve the retransmission success rate and improve the service transmission efficiency of the system.
Drawings
Fig. 1 is a schematic diagram illustrating a processing flow of a MAC layer downlink cache query message in an embodiment of the present application;
fig. 2 is a schematic diagram illustrating a flow of processing a scheduling result message of an MAC layer in an embodiment of the present application;
fig. 3 is a schematic diagram of a data packet retransmission process in an embodiment of the present application;
fig. 4 is a schematic structural diagram of an apparatus applied to the above-described technology in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the technical solutions of the present invention are described in detail below with reference to the accompanying drawings and examples.
The application provides a data packet retransmission method, which is applied to a carrier aggregation scene, an AM mode is adopted on an RLC layer for data transmission, and carriers with good channel quality are preferentially selected for transmission under the carrier aggregation scene by combining the RLC ARQ retransmission characteristic and the carrier channel quality. The scheme can improve the retransmission success rate and improve the service transmission efficiency of the system.
In the embodiment of the application, the sending end comprises an RLC entity and an MAC entity, the RLC entity is located on an RLC layer, the MAC entity is used for realizing the function of the MAC layer, and the RLC entity and the MAC entity interact with each other to process related information.
Two messages related to data packet retransmission are provided, one is a downlink cache query message of an MAC layer; the other is a MAC layer scheduling result message;
the contents of the two messages sent to the RLC entity by the MAC entity are realized in the same way as the existing implementation; the following gives the relevant processing flow for these two messages, respectively.
Aiming at the downlink cache query message of the MAC layer:
referring to fig. 1, fig. 1 is a schematic diagram illustrating a processing flow of a MAC layer downlink cache query message in an embodiment of the present application. The method comprises the following specific steps:
step 101, the sending end RLC layer receives a downlink cache query message sent by the MAC layer.
Step 102, the sending end RLC layer determines whether the carrier wave sending error rate corresponding to the query message is smaller than a first preset threshold value, if so, step 103 is executed; otherwise, step 104 is performed.
In the prior art, the query message carries the transmission error rate of the carrier corresponding to the corresponding MAC, but the prior art does not consider the transmission error rate of the carrier, and the information notifying the MAC layer is determined by considering the transmission error rate of the carrier.
The first preset threshold is configured according to actual needs, for example, may be configured as 0.4.
Step 103, the sending end RLC layer notifies the MAC layer that there is a retransmission data packet in the current data cache.
And step 104, the sending end RLC layer informs the MAC layer that no retransmission data packet exists in the current data cache.
If the carrier transmission error rate is smaller than the first preset threshold value, it indicates that the channel quality of the corresponding carrier is good, and at this time, the MAC layer is notified that a retransmitted data packet exists in the currently cached data of the RLC layer, whether newly transmitted data exists is determined according to an actual situation, that is, according to the actual situation, after the MAC layer receives the notification, normal scheduling can be performed.
If the carrier transmission error rate is not less than a first preset threshold value, the channel quality of the corresponding carrier is poor, at the moment, the RLC layer informs the MAC layer that no retransmission data packet exists in the currently cached data, whether newly transmitted data exist is determined according to the actual situation, namely, the newly transmitted data are informed according to the actual situation; thus, when the MAC schedules, the MAC considers that no retransmission data packet exists in the data cache of the MAC, and does not schedule the retransmission data packet.
The above process can reduce the chance that the retransmitted data packet is scheduled on a carrier with poor channel quality.
For the MAC layer scheduling result message:
referring to fig. 2, fig. 2 is a schematic diagram illustrating a flow of processing a scheduling result message of a MAC layer in the embodiment of the present application. The method comprises the following specific steps:
in step 201, the sending end RLC layer receives the MAC layer scheduling result message.
Step 202, the sending end RLC layer determines whether there is a retransmission data packet, if yes, step 203 is executed; otherwise, step 205 is performed.
Step 203, the sending end RLC layer determines whether the transmission error rate of the scheduling carrier in the scheduling result message is smaller than a first preset threshold, if so, step 204 is executed; otherwise, step 205 is performed.
When receiving the scheduling result message of the MAC layer, the transmitting end prepares to transmit data, and when there is retransmission data, it needs to determine whether to transmit a retransmission data packet or retransmit data other than the data packet according to the transmission error rate of the scheduling carrier.
Step 204, the sending end RLC layer sends the retransmission data packet on the scheduling carrier corresponding to the scheduling result message, and ends the process.
If the carrier transmission error rate is smaller than the first preset threshold value, the channel quality of the corresponding carrier is relatively good, and at the moment, the retransmission data packet is transmitted on the carrier corresponding to the scheduling result message.
In step 205, the sending end RLC layer sends data except for the retransmitted data packet that needs to be transmitted on the carrier corresponding to the scheduling message.
If the carrier transmission error rate is not less than the first preset threshold value, which indicates that the channel quality of the corresponding carrier is poor, the RLC layer does not transmit the retransmission data packet for the carrier corresponding to the scheduling message this time.
In the embodiment of the application, when the data packet is retransmitted, a technical scheme considering the scheduling size of the MAC layer is provided, namely, the retransmission segmentation size is controlled to reduce the retransmission segmentation times of the data packet, so that the complexity of retransmission processing is reduced, the retransmission success rate is improved, and the service transmission efficiency of the system is improved.
The following describes in detail a data packet retransmission process in an embodiment of the present application with reference to the accompanying drawings.
Referring to fig. 3, fig. 3 is a schematic diagram of a data packet retransmission process in the embodiment of the present application. The method comprises the following specific steps:
step 301, the sending end RLC layer receives the MAC layer scheduling result message.
Step 302, the sending end RLC layer determines whether there is retransmission data packet, if yes, step 303 is executed; otherwise, step 307 is executed.
Step 303, the sending end RLC layer determines whether the sending error rate of the scheduling carrier in the scheduling result message is less than a first preset threshold, if so, step 304 is executed; otherwise, step 307 is executed.
Step 304, the sending end RLC layer determines whether the MAC scheduling size in the scheduling message is greater than a second preset threshold, if so, step 306 is executed; otherwise, step 305 is performed.
The second preset threshold set here is configured according to the segmentable ratio of the size of the retransmission data PDU, and may be configured as 1/8.
Step 305, the sending end RLC layer adds 1 to the current value of the limiting threshold times, and determines whether the value of the limiting threshold times after adding 1 is greater than a third preset threshold value; if yes, go to step 306; otherwise, step 307 is executed.
If step 304, it is determined that the MAC scheduling size is not greater than the second preset threshold, which indicates that the MAC scheduling size is too small, it is determined whether to limit the transmission of the retransmission data according to the number of times of the limit threshold, so as to reduce the number of times of segmentation.
An initial value, such as 0, may be configured for the parameter limiting the threshold number of times; for the third preset threshold, the number of times of retransmission packet transmission may be limited according to the need, for example, it may be configured as 3.
When it is determined that the value of the number of times of the limitation threshold added with 1 is greater than a third preset threshold value, initializing the value of the number of times of the limitation threshold to control the transmission of subsequent retransmission data packets; in the implementation, the retransmission packet may be sent without initialization, i.e., the retransmission packet may be sent in the period.
If the value for limiting the threshold times is initialized, the value can be initialized when the value is larger than a third preset threshold value, or the value can be initialized again after the current MAC scheduling result message is processed.
Step 306, the sending end RLC layer sends the retransmission data packet on the carrier corresponding to the scheduling message, and ends the process.
Step 307, the sending end RLC layer sends data except for the retransmission data packet to be transmitted on the carrier corresponding to the scheduling message.
The implementation of this step is that the sending end RLC layer does not send the retransmitted data packet for the scheduling result message.
Based on the same inventive concept, the application also provides a data packet retransmission device, which is applied to a carrier aggregation scene and adopts an AM mode to transmit data in an RLC layer. Referring to fig. 4, fig. 4 is a schematic structural diagram of an apparatus applied to the above technology in the embodiment of the present application. The device includes: a receiving unit 401, a determining unit 402, and a transmitting unit 403;
a receiving unit 401, configured to receive a MAC scheduling result message;
a determining unit 402, configured to determine whether there is a retransmission data packet when the receiving unit 401 receives the MAC scheduling result message; whether the transmission error rate of the scheduling carrier in the scheduling result message is less than a first preset threshold value or not;
a sending unit 403, configured to send a retransmission data packet on a carrier corresponding to the scheduling message when the determining unit 402 determines that there is no retransmission data packet or determines that there is a retransmission data packet and a sending error rate of a scheduling carrier in the scheduling result message is smaller than a first preset threshold; when the determining unit 402 determines that there is a retransmitted data packet and the transmission error rate of the scheduling carrier in the scheduling result message is not less than a first preset threshold, transmitting data other than the retransmitted data packet to be transmitted on the carrier corresponding to the scheduling message.
Preferably, the first and second liquid crystal films are made of a polymer,
a determining unit 402, configured to determine whether a MAC scheduling size in the scheduling message is greater than a second preset threshold after determining that a transmission error rate of a scheduling carrier in the scheduling result message is less than a first preset threshold;
a sending unit 403, further configured to send a retransmission data packet on a carrier corresponding to the scheduling message when the determining unit 402 determines that the MAC scheduling size in the scheduling message is greater than a second preset threshold; otherwise, sending data except the retransmission data packet to be transmitted on the carrier wave corresponding to the scheduling message.
Preferably, the first and second liquid crystal films are made of a polymer,
a determining unit 402, configured to add 1 to the current value of the limiting threshold number after determining that the MAC scheduling size in the scheduling message is not greater than a second preset threshold, and determine whether the value of the limiting threshold number after adding 1 is greater than a third preset threshold; if so, transmitting a retransmission data packet on a carrier wave corresponding to the scheduling message; otherwise, sending data except the retransmission data packet to be transmitted on the carrier wave corresponding to the scheduling message.
Preferably, the first and second liquid crystal films are made of a polymer,
the determining unit 402 is further configured to initialize the value of the limiting threshold times when it is determined that the value of the limiting threshold times after adding 1 is greater than a third preset threshold value.
Preferably, the first and second liquid crystal films are made of a polymer,
a receiving unit 401, further configured to receive a downlink cache query message sent by the MAC layer;
a determining unit 402, configured to determine, when the receiving unit 401 receives a downlink cache query message sent by the MAC layer, whether a carrier transmission error rate corresponding to the query message is smaller than a first preset threshold;
a sending unit 403, further configured to notify the MAC layer that a retransmitted data packet exists in the current data cache when the determining unit 402 determines that the carrier sending error rate corresponding to the query message is smaller than a first preset threshold; otherwise, the MAC layer is informed that no retransmission data packet exists in the current data cache.
The units of the above embodiments may be integrated into one body, or may be separately deployed; may be combined into one unit or further divided into a plurality of sub-units.
In summary, in the present application, data transmission is performed in an AM mode on an RLC layer, and a carrier with good channel quality is preferentially selected for transmission in a carrier aggregation scenario by combining RLC ARQ retransmission characteristics and carrier channel quality. The scheme can improve the retransmission success rate and improve the service transmission efficiency of the system.
In the embodiment of the application, when the data packet is retransmitted, a technical scheme of considering the scheduling size of the MAC layer is provided, namely, the retransmission segmentation size is controlled to reduce the retransmission segmentation times of the data packet, so that the complexity of retransmission processing is reduced, the retransmission success rate is improved, and the service transmission efficiency of the system is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A data packet retransmission method is applied to a carrier aggregation scene, and data transmission is carried out by adopting an Acknowledged Mode (AM) in a Radio Link Control (RLC) layer, and is characterized by comprising the following steps: step (ii) of
A. When the RLC layer of the sending end receives the scheduling result message of the MAC layer, whether a retransmission data packet exists is determined; if yes, executing step B; otherwise, executing step D;
B. determining whether the transmission error rate of the scheduling carrier in the scheduling result message is less than a first preset threshold value, if so, executing the step C; otherwise, executing step D;
C. transmitting a retransmission data packet on a carrier corresponding to the scheduling message; ending the flow;
D. and the sending end RLC layer sends data except the retransmission data packet to be transmitted on the carrier wave corresponding to the scheduling message.
2. The method according to claim 1, wherein after determining that the transmission error rate of the scheduled carrier in the scheduling result message in step B is smaller than the first preset threshold value and before step C, the method further comprises:
determining whether the MAC scheduling size in the scheduling message is larger than a second preset threshold value, if so, executing the step C; otherwise, executing step D.
3. The method according to claim 2, wherein after determining that the MAC scheduling size in the scheduling message is not greater than the second preset threshold value and before the step D, the method further comprises:
adding 1 to the current value of the limiting threshold times, and determining whether the value of the limiting threshold times after the 1 is added is larger than a third preset threshold value; if yes, executing step C; otherwise, executing step D.
4. The method of claim 2, wherein when it is determined that the value of the number of times of the restriction threshold added by 1 is greater than a third preset threshold, the method further comprises:
initializing a value of the limit threshold number of times.
5. The method according to any one of claims 1-4, wherein the method further comprises:
when receiving a downlink cache query message sent by an MAC layer, an RLC layer of a sending end determines whether a carrier sending error rate corresponding to the query message is smaller than a first preset threshold value, and if so, informs the MAC layer that a retransmission data packet exists in a current data cache; otherwise, the MAC layer is informed that no retransmission data packet exists in the current data cache.
6. A data packet retransmission device is applied to a carrier aggregation scene, and adopts an Acknowledged Mode (AM) to transmit data in a Radio Link Control (RLC) layer, and is characterized by comprising the following steps: a receiving unit, a determining unit and a transmitting unit;
the receiving unit is used for receiving a Media Access Control (MAC) scheduling result message;
the determining unit is configured to determine whether a retransmission data packet exists when the receiving unit receives the MAC scheduling result message; whether the transmission error rate of the scheduling carrier in the scheduling result message is less than a first preset threshold value or not;
the sending unit is configured to send the retransmission data packet on the carrier corresponding to the scheduling message when the determining unit determines that no retransmission data packet exists or determines that a retransmission data packet exists and the transmission error rate of the scheduling carrier in the scheduling result message is smaller than a first preset threshold; and when the determining unit determines that the retransmission data packet exists and the transmission error rate of the scheduling carrier in the scheduling result message is not less than a first preset threshold value, transmitting data except the retransmission data packet to be transmitted on the carrier corresponding to the scheduling message.
7. The apparatus of claim 6,
the determining unit is further configured to determine whether the MAC scheduling size in the scheduling message is greater than a second preset threshold after determining that the transmission error rate of the scheduling carrier in the scheduling result message is less than a first preset threshold;
the sending unit is further configured to send a retransmission data packet on a carrier corresponding to the scheduling message when the determining unit determines that the MAC scheduling size in the scheduling message is greater than a second preset threshold; otherwise, sending data except the retransmission data packet to be transmitted on the carrier wave corresponding to the scheduling message.
8. The apparatus of claim 7,
the determining unit is further configured to, after determining that the MAC scheduling size in the scheduling message is not greater than a second preset threshold, add 1 to the current value of the number of times of limiting the threshold, and determine whether the value of the number of times of limiting the threshold after adding 1 is greater than a third preset threshold; if so, transmitting a retransmission data packet on a carrier wave corresponding to the scheduling message; otherwise, sending data except the retransmission data packet to be transmitted on the carrier wave corresponding to the scheduling message.
9. The apparatus of claim 7,
the determining unit is further configured to initialize the value of the number of times of the limiting threshold when it is determined that the value of the number of times of the limiting threshold after adding 1 is greater than a third preset threshold.
10. The apparatus according to any one of claims 6 to 9,
the receiving unit is further configured to receive a downlink cache query message sent by the MAC layer;
the determining unit is further configured to determine whether a carrier transmission error rate corresponding to the query message is smaller than a first preset threshold value when the receiving unit receives a downlink cache query message sent by the MAC layer;
the sending unit is further configured to notify the MAC layer that a retransmitted data packet exists in the current data cache when the determining unit determines that the carrier sending error rate corresponding to the query message is smaller than a first preset threshold; otherwise, the MAC layer is informed that no retransmission data packet exists in the current data cache.
CN201710637099.XA 2017-07-31 2017-07-31 Data packet retransmission method and device Expired - Fee Related CN109327289B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710637099.XA CN109327289B (en) 2017-07-31 2017-07-31 Data packet retransmission method and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710637099.XA CN109327289B (en) 2017-07-31 2017-07-31 Data packet retransmission method and device

Publications (2)

Publication Number Publication Date
CN109327289A CN109327289A (en) 2019-02-12
CN109327289B true CN109327289B (en) 2021-08-20

Family

ID=65245426

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710637099.XA Expired - Fee Related CN109327289B (en) 2017-07-31 2017-07-31 Data packet retransmission method and device

Country Status (1)

Country Link
CN (1) CN109327289B (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101001131A (en) * 2006-01-12 2007-07-18 华为技术有限公司 Partition cascade method
CN101170388A (en) * 2006-10-27 2008-04-30 中兴通讯股份有限公司 Method for identifying whether resending protocol data unit is sectioned
CN101277174A (en) * 2007-03-30 2008-10-01 华为技术有限公司 Method and apparatus for data retransmission based on service quality as well as radio communication system
CN101494520A (en) * 2008-01-22 2009-07-29 中兴通讯股份有限公司 Method for dynamically regulating wireless link control protocol data cell size
CN102281120A (en) * 2010-06-08 2011-12-14 鼎桥通信技术有限公司 Signaling sending method, network side equipment and user equipment
CN102437906A (en) * 2012-01-20 2012-05-02 中国科学院上海微系统与信息技术研究所 Design method of HARQ (Hybrid Automatic Repeat-request) communication way applied to SC-FDE (Signal Carrier Frequency-Domain Equalization) baseband system
CN105530077A (en) * 2014-10-22 2016-04-27 中国移动通信集团公司 Retransmission packet retransmitting method for base stations with dual-connectivity for terminal, base station and terminal
CN106788782A (en) * 2016-12-06 2017-05-31 哈尔滨工程大学 Underwater sound communication network OFDM Link Physical Layers and MAC layer cross-layer communication method
CN106982107A (en) * 2016-01-15 2017-07-25 中兴通讯股份有限公司 Dispatching method, scheduler and network access equipment

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101001131A (en) * 2006-01-12 2007-07-18 华为技术有限公司 Partition cascade method
CN101170388A (en) * 2006-10-27 2008-04-30 中兴通讯股份有限公司 Method for identifying whether resending protocol data unit is sectioned
CN101277174A (en) * 2007-03-30 2008-10-01 华为技术有限公司 Method and apparatus for data retransmission based on service quality as well as radio communication system
CN101494520A (en) * 2008-01-22 2009-07-29 中兴通讯股份有限公司 Method for dynamically regulating wireless link control protocol data cell size
CN102281120A (en) * 2010-06-08 2011-12-14 鼎桥通信技术有限公司 Signaling sending method, network side equipment and user equipment
CN102437906A (en) * 2012-01-20 2012-05-02 中国科学院上海微系统与信息技术研究所 Design method of HARQ (Hybrid Automatic Repeat-request) communication way applied to SC-FDE (Signal Carrier Frequency-Domain Equalization) baseband system
CN105530077A (en) * 2014-10-22 2016-04-27 中国移动通信集团公司 Retransmission packet retransmitting method for base stations with dual-connectivity for terminal, base station and terminal
CN106982107A (en) * 2016-01-15 2017-07-25 中兴通讯股份有限公司 Dispatching method, scheduler and network access equipment
CN106788782A (en) * 2016-12-06 2017-05-31 哈尔滨工程大学 Underwater sound communication network OFDM Link Physical Layers and MAC layer cross-layer communication method

Also Published As

Publication number Publication date
CN109327289A (en) 2019-02-12

Similar Documents

Publication Publication Date Title
US11582640B2 (en) Method and apparatus for efficient operation upon packet duplication activation and deactivation in next generation wireless communication system
US8175014B2 (en) Method and apparatus for using a relay to provide physical and hybrid automatic repeat request functionalities
EP2567482B1 (en) Method and system of transfering data in a carrier aggregation environment
US6625133B1 (en) System and method for link and media access control layer transaction initiation procedures
JP5438115B2 (en) RLC segmentation for carrier aggregation
US8638773B2 (en) RLC for multi-carrier LTE systems
US7489629B2 (en) Methods and media access controller for broadband wireless communications with variable data unit size and delayed data unit construction
JP2011517150A (en) Control of data transmission based on HARQ in a wireless communication system
US7688855B2 (en) Multi-rate multi-receiver multi-response aggregation
JP2012515508A (en) Timer poll retransmission maturity in wireless communication systems
TW200901783A (en) Method and apparatus for polling in a wireless communication system
US20170164231A1 (en) Data transmission method and base station
WO2018082582A1 (en) Data transmission method and device, and computer storage medium
WO2008030050A1 (en) Method and apparatus for automatic repeat request in a multi-hop broadband wireless communication system
CN110999162A (en) Method and apparatus for transmitting and receiving duplicate packets in next generation mobile communication system
EP3698570B1 (en) Method and apparatus for efficient operation upon packet duplication activation and deactivation in next generation wireless communication system
Sayenko et al. Performance analysis of the IEEE 802.16 ARQ mechanism
CN103703828A (en) Data transmission method and apparatus
WO2021229443A1 (en) Methods and apparatus for transmitting sidelink control information indicating no sidelink data
US20100303053A1 (en) Aggregated session management method and system
CN109327289B (en) Data packet retransmission method and device
CN107968754B (en) Flow table issuing method, receiving method, controller, switch and forwarding system
CN109729554B (en) Uplink enhanced data transmission method and device and user equipment
WO2023185523A1 (en) Method and device for wireless communication node
EP4007193A1 (en) Apparatus and method for block acknowledgement within reduced duration

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20210820