CN116760512B - HARQ retransmission control method and device for Multi-Link - Google Patents
HARQ retransmission control method and device for Multi-Link Download PDFInfo
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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
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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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
- H04L1/1829—Arrangements specially adapted for the receiver end
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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
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1835—Buffer management
- H04L1/1845—Combining techniques, e.g. code combining
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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
- H04L1/1867—Arrangements specially adapted for the transmitter end
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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
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1887—Scheduling and prioritising arrangements
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- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
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Abstract
The application discloses a HARQ retransmission control method and device for Multi-Link, comprising the following steps: acquiring a first transmission data packet of each link; determining link information of each link and data information of the first transmission data packet in response to a retransmission request for the first transmission data packet; determining link exchange sequence based on the link information and the data information; according to the link exchange sequence, reallocating each link for the first transmission data packet to obtain a second transmission data packet; and carrying out retransmission control based on the second transmission data packet. Therefore, the application can exchange the transmission data of each link in retransmission, improve the retransmission diversity gain of HARQ and improve the performance of merging and decoding.
Description
Technical Field
The application relates to the technical field of wireless local area networks, in particular to a HARQ retransmission control method and device for Multi-Link.
Background
Currently, in order to improve communication efficiency, more and more wireless communication devices may support simultaneous multi-band communication or multi-channel communication. Such Multi-band communication or Multi-channel communication is referred to as Multi-link communication. One of the bands or channels is called a link.
In practice, it has been found that, due to the non-uniformity of the wireless communication channels in different frequency bands or channels, the performance of each link in a Multi-link transmission is also non-uniform and is often limited to a few links that are weaker. Hybrid automatic repeat request (Hybrid Automatic Repeat Request, HARQ), on the other hand, is a technique that combines forward error correction codes with automatic retransmissions. When the forward error correction code cannot correct the transmission error, the receiving end requests the transmitting end to retransmit the data. When HARQ is used for Multi-link transmission, if the channel variation is not large, the performance is still limited by a few links with weaker retransmission, and the links are also links with limited performance in the first transmission. For these several links, the obtained retransmission diversity gain is very limited even if the two transmissions are decoded in combination.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the application provides a HARQ retransmission control method and device for Multi-Link, which can exchange transmission data of each Link in retransmission, improve the retransmission diversity gain of HARQ and improve the performance of merging and decoding.
According to an aspect of an embodiment of the present application, there is provided a HARQ retransmission control method for Multi-Link, including:
acquiring a first transmission data packet of each link;
determining link information of each link and data information of the first transmission data packet in response to a retransmission request for the first transmission data packet;
determining link exchange sequence based on the link information and the data information;
according to the link exchange sequence, reallocating each link for the first transmission data packet to obtain a second transmission data packet;
and carrying out retransmission control based on the second transmission data packet.
As an alternative embodiment, the link information includes at least one of: link quality of each link and link bandwidth of each link; wherein the link quality comprises at least one of: signal to noise ratio, signal to interference plus noise ratio, EVM, bit error rate, symbol error rate, and number of retransmissions.
As an alternative embodiment, determining the link exchange order based on the link information and the data information includes:
determining a target link with link quality superior to a preset link standard based on the link quality of each link;
and distributing the data to be retransmitted, of which the link quality is lower than that of the target link, to the target link based on the data information to obtain the link exchange sequence.
As an alternative embodiment, determining the link exchange order based on the link information and the data information includes:
determining a target link with the link bandwidth superior to a preset bandwidth standard based on the link bandwidth of each link;
and distributing the data to be retransmitted of which the link bandwidth is smaller than that of the target link to the target link based on the data information to obtain the link exchange sequence.
As an alternative embodiment, the link exchange order is a sequence of retransmission order functions, an inverse sequence of retransmission order functions, or an index sequence.
As an alternative embodiment, the method further comprises:
and combining and decoding based on the first transmission data packet and the second transmission data packet to obtain target received data.
As an alternative embodiment, the manner of merging decoding includes at least one of: select combining, weighted combining, chase combining, incremental redundancy combining.
According to another aspect of the embodiment of the present application, there is also provided an HARQ retransmission control device for Multi-Link, including:
the data packet acquisition unit is used for acquiring a first transmission data packet of each link;
an information determining unit configured to determine link information of each link and data information of the first transmission packet in response to a retransmission request for the first transmission packet;
a sequence determining unit, configured to determine a link exchange sequence based on the link information and the data information;
the link switching unit is used for reallocating each link for the first transmission data packet according to the link switching sequence to obtain a second transmission data packet;
and the retransmission unit is used for carrying out retransmission control based on the second transmission data packet.
As an alternative embodiment, the link information includes at least one of: link quality of each link and link bandwidth of each link; wherein the link quality comprises at least one of: signal to noise ratio, signal to interference plus noise ratio, EVM, bit error rate, symbol error rate, and number of retransmissions.
As an alternative embodiment, the sequence determining unit is specifically configured to:
determining a target link with link quality superior to a preset link standard based on the link quality of each link;
and distributing the data to be retransmitted, of which the link quality is lower than that of the target link, to the target link based on the data information to obtain the link exchange sequence.
As an alternative embodiment, the sequence determining unit is specifically configured to:
determining a target link with the link bandwidth superior to a preset bandwidth standard based on the link bandwidth of each link;
and distributing the data to be retransmitted of which the link bandwidth is smaller than that of the target link to the target link based on the data information to obtain the link exchange sequence.
According to yet another aspect of an embodiment of the present application, there is also provided a computing device including: at least one processor, memory, and input output unit; the memory is used for storing a computer program, and the processor is used for calling the computer program stored in the memory to execute the HARQ retransmission control method for Multi-Link.
According to yet another aspect of the embodiments of the present application, there is also provided a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the HARQ retransmission control method for Multi-Link described above.
In the embodiment of the application, a first transmission data packet of each link is acquired; determining link information of each link and data information of the first transmission data packet in response to a retransmission request for the first transmission data packet; determining link exchange sequence based on the link information and the data information; according to the link exchange sequence, reallocating each link for the first transmission data packet to obtain a second transmission data packet; and carrying out retransmission control based on the second transmission data packet. Therefore, the application can exchange the transmission data of each link in retransmission, improve the retransmission diversity gain of HARQ and improve the performance of merging and decoding.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 is a flow chart of an alternative HARQ retransmission control method for Multi-Link according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an alternative link exchange retransmission mechanism according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an alternative link-switched retransmission data transmission mechanism according to an embodiment of the present application;
fig. 4 is a schematic diagram of an alternative link exchange retransmission data receiving mechanism according to an embodiment of the present application;
FIG. 5 is a schematic diagram of an alternative link exchange sequence feedback mechanism according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of an alternative HARQ retransmission control device for Multi-Link according to an embodiment of the present application;
FIG. 7 schematically illustrates a schematic structural diagram of a medium according to an embodiment of the present application;
FIG. 8 schematically illustrates a structural diagram of a computing device in accordance with embodiments of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, fig. 1 is a flowchart of a HARQ retransmission control method for Multi-Link according to an embodiment of the present application. It should be noted that embodiments of the present application may be applied to any scenario where applicable.
The flow of the HARQ retransmission control method for Multi-Link according to an embodiment of the present application shown in fig. 1 includes:
step S101, a first transmission data packet of each link is obtained.
In this embodiment, the execution subject may be a wireless communication device that performs Multi-Link communication. Wherein Multi-Link communication refers to Multi-band communication or Multi-channel communication. Now, in order to improve communication efficiency, more and more wireless communication devices may support simultaneous multi-band communication or multi-channel communication. One of the bands or channels is called a link. In contrast to conventional single link transmissions, multi-link systems allow transmissions to occur over multiple links, i.e., multi-link may implement cross-band/channel transmissions. Multi-link transmission can have stronger reliability and transmission performance than single link transmission due to the utilization of multiple frequency band/channel resources.
In practical application, HARQ (Hybrid Automatic Repeat Request ) may be used for Multi-link transmission. Among them, HARQ is a technique combining forward error correction codes with automatic retransmission. When the forward error correction code cannot correct the transmission error, the receiving end requests the transmitting end to retransmit the data.
In the HARQ retransmission control process, the first transmission data packet of each link may be acquired first. The first transmission data packet is a transmission data packet with transmission errors in the first transmission.
Step S102, determining link information of each link and data information of the first transmission data packet in response to the retransmission request for the first transmission data packet.
In the present embodiment, the execution body may determine link information of each link for transmitting the first transmission packet, and data information of the first transmission packet in response to a retransmission request for the first transmission packet in which a transmission error occurs. The link information is used to describe link parameters of each link, and the link parameters may include, but are not limited to, link quality and link bandwidth. The data information is used to describe parameters of transmission data of each link, and may include, but is not limited to, data amount and data type.
And, a retransmission request for the first transmission data packet may be transmitted by the data receiver to the data transmitter.
Step S103, determining link exchange sequence based on the link information and the data information.
In this embodiment, after obtaining the link information and the data information, the execution body may adjust the link sequence for performing data transmission based on the link information and the data information, to obtain the link exchange sequence. The link exchange sequence is used for describing the updated mapping relation between the link and the data to be transmitted. The link exchange sequence may be determined by the data sender or the data receiver, which is not limited in this embodiment.
In particular, the executing body may select, during retransmission, to retransmit the data of the link with the poor transmission quality by using the link with the better quality, and retransmit the data of the link with the better transmission quality by using the link with the poor quality. Or, in retransmission, retransmitting the data of the link with smaller transmission bandwidth by using the link with larger bandwidth, and retransmitting the data of the link with larger transmission bandwidth by using the link with smaller transmission bandwidth.
Step S104, reallocating each link for the first transmission data packet according to the link exchange sequence to obtain a second transmission data packet.
In this embodiment, after determining that the link exchange sequence is obtained, the execution body may reallocate each link for the first transmission data packet according to the link exchange sequence to obtain the second transmission data packet. The second transmission data packet is a data packet for retransmission, which exchanges data to be retransmitted of each link. And the retransmission control is carried out through the second transmission data packet, so that the data packets sent by each link can be exchanged when the sender retransmits. For example, there are multiple links between the data sender and the data receiver, and a transmission error occurs when each link first transmits a first transmission data packet. Then, the link exchange order can be determined based on the link information of the link and the data information of the first transmission packet. Based on link exchange sequence, mapping relation between different links and different data packets can be exchanged, and the exchanged links are used for transmitting data to be retransmitted. Namely, retransmission control is performed in accordance with the second transmission packet.
Step S105, performing retransmission control based on the second transmission data packet.
As an alternative embodiment, the link information includes at least one of: link quality of each link and link bandwidth of each link; wherein the link quality comprises at least one of: signal to noise ratio, signal to interference plus noise ratio, EVM, bit error rate, symbol error rate, and number of retransmissions.
As an alternative embodiment, determining the link exchange order based on the link information and the data information includes:
determining a target link with link quality superior to a preset link standard based on the link quality of each link;
and distributing the data to be retransmitted, of which the link quality is lower than that of the target link, to the target link based on the data information to obtain the link exchange sequence.
In this embodiment, the execution body may acquire link quality parameters of each link, and calculate the link quality parameters based on a preset quality calculation formula to obtain a link quality score. And matching the link quality scores of the links with preset link standards to determine the target link with the link quality score higher than the preset link standard score as the link with the link quality higher than the preset link standard. I.e. a link of better quality is determined. And then, the execution main body can further determine the data information of the first transmission data packet, and allocate the data to be retransmitted of other links with the link quality scores lower than that of the target link to the target link so as to obtain the new corresponding relation between the data to be retransmitted and the link, namely, the link exchange sequence is obtained. And the execution main body can also distribute the data to be retransmitted of the target link to other links with poor quality, so as to realize the adjustment of the mapping relation between the link and the data to be retransmitted according to the link quality.
As an alternative embodiment, determining the link exchange order based on the link information and the data information includes:
determining a target link with the link bandwidth superior to a preset bandwidth standard based on the link bandwidth of each link;
and distributing the data to be retransmitted of which the link bandwidth is smaller than that of the target link to the target link based on the data information to obtain the link exchange sequence.
In this embodiment, the execution body may obtain the link bandwidths of the links, and match the link bandwidths of the links with a preset bandwidth standard, so as to determine a target link with a link bandwidth greater than the preset bandwidth standard, as a link with a larger bandwidth. And then, the execution body can further determine the data information of the first transmission data packet, and allocate the data to be retransmitted of other links with the bandwidth smaller than that of the target link to the target link so as to obtain the new correspondence between the data to be retransmitted and the link, namely, the link exchange sequence is obtained. And the execution main body can also distribute the data to be retransmitted of the target link to other links with smaller bandwidths, so as to realize the adjustment of the mapping relation between the link and the data to be retransmitted according to the link bandwidths.
As an alternative embodiment, the link exchange order is a sequence of retransmission order functions, an inverse sequence of retransmission order functions, or an index sequence.
In this embodiment, the retransmission order function sequence may be a sequence formed by a new permutation of the link, and the inverse function sequence of the retransmission order function may be a function sequence obtained by inverting a sequence formed by a new permutation of the link. The index sequence may be a sequence of indexes of link in a preset list.
And the data sender can calculate the retransmission sequence of the function and send the retransmission sequence of the function to the data receiver, so that the data receiver can inversely push the inverse function sequence of the retransmission sequence according to the retransmission sequence of the function, thereby realizing the determination of link exchange sequence.
The data sender may also calculate a retransmission order function sequence, and inversely infer an inverse function sequence of the retransmission order function according to the retransmission order function sequence, and send the inverse function sequence of the retransmission order function to the data receiver.
And the data receiving side can also calculate the inverse function sequence of the retransmission sequence function after receiving the first transmission data packet, and send the inverse function sequence of the retransmission sequence function to the data sending side, so that the data sending side can inversely push and determine the link exchange sequence.
The data receiving side may also calculate the retransmission order function sequence after receiving the first transmission data packet, and send the retransmission order function sequence to the data transmitting side.
As an alternative embodiment, the method further comprises:
and combining and decoding based on the first transmission data packet and the second transmission data packet to obtain target received data.
As an alternative embodiment, the manner of merging decoding includes at least one of: select combining, weighted combining, chase combining, incremental redundancy combining.
Referring to fig. 2 together, fig. 2 is a schematic diagram of an alternative link exchange retransmission mechanism according to an embodiment of the present application, as shown in fig. 2, in which the present design includes three possible designs corresponding to (a), (b) and (c) in fig. 2, respectively. The following descriptions are provided respectively:
(a) The time sequence is described as follows: the communication equipment A sends a data packet to the communication equipment B, the B sends a retransmission request to the A, the A determines a link exchange sequence and sends the link exchange sequence and the retransmission data packet to the B;
(b) The time sequence is described as follows: the communication equipment A sends a data packet to the communication equipment B, the B determines the link exchange sequence and sends the link exchange sequence and a retransmission request to the A, and the A sends a retransmission data packet to the B;
(c) The time sequence is described as follows: the communication device A sends a data packet to the communication device B, the B sends a retransmission request to the A, and the A sends a retransmission data packet to the B.
Referring to fig. 3 together, fig. 3 is a schematic diagram of an alternative link exchange retransmission data transmission mechanism according to an embodiment of the present application, as shown in fig. 3, in this design, a sender exchanges data packets sent by links during retransmission, and specifically describes:
between communication device A and communication device BThe simultaneous transmission of link, A sends data packet to B, link +.>The transmission data is->(/>). It should be noted that part->May be empty, i.e., no data is transmitted on a portion of the link.
The retransmission data of A to B isWherein->Correspond to->Is used for retransmitting data. It should be noted that->Possibly withCompletely in agreement, it is also possible to agree with +.>Inconsistencies, possibly +.>May be empty. During retransmission from A to B, it is possible to exchange the correspondence between link and packet, i.e. link +.>The transmission data is->Wherein->Is->Is a function of (1) which satisfiesIs->Is a permutation of (a); on the other hand (S)>Is->Inverse function of (i.e.)>. It should be noted that if->Empty, link +.>The non-retransmission data may be transmitted by the way.
Referring to fig. 4 together, fig. 4 is a schematic diagram of an alternative link exchange retransmission data receiving mechanism according to an embodiment of the present application, as shown in fig. 4, in this design, a sender exchanges data packets received by each link during retransmission, which is specifically described as follows:
between communication device A and communication device BThe link is transmitted simultaneously, B receives the transmission data packet of A, link +.>The received data is->(/>)。
B, the received retransmission data is。
B willAnd->And merging and decoding. If->、/>And->、/>、…/>、/>、/>、…/>The correlation is strong or repeated, and the receiving terminal can also add +.>、/>、/>、/>、…/>、/>、/>、…/>The decoding is combined together. It should be noted that the combining manner may be a combining manner of selecting combining, weighted combining or other HARQ techniques, such as Chase combining (Chase combining) and incremental redundancy (Incremental Redundancy) combining.
Referring to fig. 5, fig. 5 is a schematic diagram of an alternative link exchange sequence feedback mechanism according to an embodiment of the present application, as shown in fig. 5, where (a) and (b) require an inter-device transmission link exchange sequence, as shown in the above figure. The design gives feedback mechanisms respectively:
there are 2 types of (a):
a, after receiving the retransmission request, calculatingWill->Is sent to B, B is according to->Reverse push out->。
A, after receiving the retransmission request, calculatingWill push the result back->And sending to B.
There are 2 types of (a) for (b):
b after receiving the first data packet, calculatingWill->And sending to A.
B, after receiving the first data packet, calculating and calculating retransmission sequenceWill->Is sent to A, A is according to->Reverse push out->. It is noted that the above->Or->May be completeOr->The sequence may also be +.>Index in the list of (c).
In the embodiment of the application, a first transmission data packet of each link is acquired; determining link information of each link and data information of the first transmission data packet in response to a retransmission request for the first transmission data packet; determining link exchange sequence based on the link information and the data information; according to the link exchange sequence, reallocating each link for the first transmission data packet to obtain a second transmission data packet; and carrying out retransmission control based on the second transmission data packet. Therefore, the application can exchange the transmission data of each link in retransmission, improve the retransmission diversity gain of HARQ and improve the performance of merging and decoding.
Having described the method of the exemplary embodiment of the present application, next, a HARQ retransmission control device for Multi-Link according to the exemplary embodiment of the present application, which includes at least a packet acquisition unit 201, an information determination unit 202, a sequence determination unit 203, a Link exchange unit 204, and a retransmission unit 205, will be described with reference to fig. 6.
A packet acquisition unit 201, configured to acquire a first transmission packet of each link;
an information determining unit 202, configured to determine link information of each link and data information of the first transmission data packet in response to a retransmission request for the first transmission data packet;
an order determining unit 203, configured to determine a link exchange order based on the link information and the data information;
link switching unit 204, configured to reallocate each link for the first transmission data packet according to the link switching sequence, to obtain a second transmission data packet;
and a retransmission unit 205, configured to perform retransmission control based on the second transmission data packet.
As an alternative embodiment, the link information includes at least one of: link quality of each link and link bandwidth of each link; wherein the link quality comprises at least one of: signal to noise ratio, signal to interference plus noise ratio, EVM, bit error rate, symbol error rate, and number of retransmissions.
As an alternative embodiment, the sequence determining unit 203 is specifically configured to:
determining a target link with link quality superior to a preset link standard based on the link quality of each link;
and distributing the data to be retransmitted, of which the link quality is lower than that of the target link, to the target link based on the data information to obtain the link exchange sequence.
As an alternative embodiment, the sequence determining unit 203 is specifically configured to:
determining a target link with the link bandwidth superior to a preset bandwidth standard based on the link bandwidth of each link;
and distributing the data to be retransmitted of which the link bandwidth is smaller than that of the target link to the target link based on the data information to obtain the link exchange sequence.
As an alternative embodiment, the link exchange order is a sequence of retransmission order functions, an inverse sequence of retransmission order functions, or an index sequence.
As an alternative embodiment, the apparatus further comprises:
and the decoding unit is used for carrying out merging decoding based on the first transmission data packet and the second transmission data packet to obtain target received data.
As an alternative embodiment, the manner of merging decoding includes at least one of: select combining, weighted combining, chase combining, incremental redundancy combining.
In the embodiment of the application, a first transmission data packet of each link is acquired; determining link information of each link and data information of the first transmission data packet in response to a retransmission request for the first transmission data packet; determining link exchange sequence based on the link information and the data information; according to the link exchange sequence, reallocating each link for the first transmission data packet to obtain a second transmission data packet; and carrying out retransmission control based on the second transmission data packet. Therefore, the application can exchange the transmission data of each link in retransmission, improve the retransmission diversity gain of HARQ and improve the performance of merging and decoding.
Having described the method and apparatus of the exemplary embodiments of the present application, reference is next made to fig. 7 for describing a computer readable storage medium of the exemplary embodiments of the present application, and referring to fig. 7, the computer readable storage medium is shown as an optical disc 30, on which a computer program (i.e., a program product) is stored, where the computer program, when executed by a processor, implements the steps described in the above method embodiments, such as obtaining a first transmission packet of each link; determining link information of each link and data information of the first transmission data packet in response to a retransmission request for the first transmission data packet; determining link exchange sequence based on the link information and the data information; according to the link exchange sequence, reallocating each link for the first transmission data packet to obtain a second transmission data packet; performing retransmission control based on the second transmission data packet; the specific implementation of each step is not repeated here.
It should be noted that examples of the computer readable storage medium may also include, but are not limited to, a phase change memory (PRAM), a Static Random Access Memory (SRAM), a Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a flash memory, or other optical or magnetic storage medium, which will not be described in detail herein.
Having described the method, medium and apparatus of the exemplary embodiments of the present application, next, a computing device for HARQ retransmission control of Multi-Link of the exemplary embodiments of the present application is described with reference to fig. 8.
FIG. 8 illustrates a block diagram of an exemplary computing device 40 suitable for use in implementing embodiments of the application, the computing device 40 may be a computer system or a server. The computing device 40 shown in fig. 8 is merely an example and should not be taken as limiting the functionality and scope of use of embodiments of the present application.
As shown in fig. 8, components of computing device 40 may include, but are not limited to: one or more processors or processing units 401, a system memory 402, a bus 403 that connects the various system components (including the system memory 402 and the processing units 401).
Computing device 40 typically includes a variety of computer system readable media. Such media can be any available media that is accessible by computing device 40 and includes both volatile and nonvolatile media, removable and non-removable media.
The system memory 402 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) 4021 and/or cache memory 4022. Computing device 40 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, ROM4023 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 8 and commonly referred to as a "hard disk drive"). Although not shown in fig. 8, a magnetic disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media), may be provided. In such cases, each drive may be coupled to bus 403 through one or more data medium interfaces. The system memory 402 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of the embodiments of the application.
A program/utility 4025 having a set (at least one) of program modules 4024 may be stored, for example, in system memory 402, and such program modules 4024 include, but are not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules 4024 generally perform the functions and/or methodologies of the described embodiments of the present application.
Computing device 40 may also communicate with one or more external devices 404 (e.g., keyboard, pointing device, display, etc.). Such communication may occur through an input/output (I/O) interface 405. Moreover, computing device 40 may also communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet, through network adapter 406. As shown in fig. 8, network adapter 406 communicates with other modules of computing device 40, such as processing unit 401, etc., over bus 403. It should be appreciated that although not shown in fig. 8, other hardware and/or software modules may be used in connection with computing device 40.
The processing unit 401 executes various functional applications and data processing by running a program stored in the system memory 402, for example, acquires a first transmission packet of each link; determining link information of each link and data information of the first transmission data packet in response to a retransmission request for the first transmission data packet; determining link exchange sequence based on the link information and the data information; according to the link exchange sequence, reallocating each link for the first transmission data packet to obtain a second transmission data packet; and carrying out retransmission control based on the second transmission data packet. The specific implementation of each step is not repeated here. It should be noted that although several units/modules or sub-units/sub-modules of the HARQ retransmission control device for Multi-Link are mentioned in the above detailed description, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more units/modules described above may be embodied in one unit/module in accordance with embodiments of the present application. Conversely, the features and functions of one unit/module described above may be further divided into ones that are embodied by a plurality of units/modules.
In the description of the present application, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer readable storage medium executable by a processor. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Finally, it should be noted that: the above examples are only specific embodiments of the present application, and are not intended to limit the scope of the present application, but it should be understood by those skilled in the art that the present application is not limited thereto, and that the present application is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Furthermore, although the operations of the methods of the present application are depicted in the drawings in a particular order, this is not required to either imply that the operations must be performed in that particular order or that all of the illustrated operations be performed to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform.
Claims (5)
1. A HARQ retransmission control method for Multi-Link, comprising:
acquiring a first transmission data packet of each link; the first transmission data packet is a transmission data packet with transmission errors in the first transmission;
determining link information of each link and data information of the first transmission data packet in response to a retransmission request for the first transmission data packet; wherein, the retransmission request is sent to the data sender by the data receiver;
determining link exchange sequence based on the link information and the data information;
according to the link exchange sequence, reallocating each link for the first transmission data packet to obtain a second transmission data packet;
performing retransmission control based on the second transmission data packet;
the link information includes at least one of: link quality of each link and link bandwidth of each link; wherein the link quality comprises at least one of: signal to noise ratio, signal to interference plus noise ratio, EVM, bit error rate, symbol error rate, and number of retransmissions;
determining link exchange order based on the link information and the data information, including: selecting a link with better quality to retransmit the data of a link with worse transmission quality, and retransmitting the data of a link with better transmission quality with a link with worse quality;
determining link exchange order based on the link information and the data information, including: and selecting a link with larger bandwidth to retransmit the data of the link with smaller transmission bandwidth before, and retransmitting the data of the link with larger transmission bandwidth before by using the link with smaller transmission bandwidth.
2. The HARQ retransmission control method for Multi-Link according to claim 1, wherein the Link exchange order is a retransmission order function sequence, an inverse function sequence of a retransmission order function, or an index sequence.
3. The HARQ retransmission control method for Multi-Link according to claim 1, characterized in that the method further comprises:
and combining and decoding based on the first transmission data packet and the second transmission data packet to obtain target received data.
4. The HARQ retransmission control method for Multi-Link according to claim 3, characterized in that the manner of combining decoding comprises at least one of: select combining, weighted combining, chase combining, incremental redundancy combining.
5. A HARQ retransmission control device for Multi-Link, comprising:
the data packet acquisition unit is used for acquiring a first transmission data packet of each link; the first transmission data packet is a transmission data packet with transmission errors in the first transmission;
an information determining unit configured to determine link information of each link and data information of the first transmission packet in response to a retransmission request for the first transmission packet; wherein, the retransmission request is sent to the data sender by the data receiver;
a sequence determining unit, configured to determine a link exchange sequence based on the link information and the data information;
the link switching unit is used for reallocating each link for the first transmission data packet according to the link switching sequence to obtain a second transmission data packet;
a retransmission unit, configured to perform retransmission control based on the second transmission data packet;
the link information includes at least one of: link quality of each link and link bandwidth of each link; wherein the link quality comprises at least one of: signal to noise ratio, signal to interference plus noise ratio, EVM, bit error rate, symbol error rate, and number of retransmissions;
the sequence determining unit is specifically configured to: selecting a link with better quality to retransmit the data of a link with worse transmission quality, and retransmitting the data of a link with better transmission quality with a link with worse quality;
the sequence determining unit is specifically configured to: and selecting a link with larger bandwidth to retransmit the data of the link with smaller transmission bandwidth before, and retransmitting the data of the link with larger transmission bandwidth before by using the link with smaller transmission bandwidth.
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