CN110971352B - HARQ retransmission processing method and device for uplink enhanced RLC (radio link control) fragments - Google Patents
HARQ retransmission processing method and device for uplink enhanced RLC (radio link control) fragments 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
- H04L1/1806—Go-back-N protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- 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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/02—Data link layer protocols
Abstract
The embodiment of the invention discloses a HARQ retransmission processing method and a device of uplink enhanced RLC (radio Link control) fragments, wherein the method comprises the following steps: in the transmission process of the uplink enhanced RLC fragments, if the judgment shows that the retransmission times of the HARQ of the target fragments reach the threshold value, all the fragments to be transmitted which are not transmitted in the current voice packet except the target fragments are obtained; and transmitting the fragments to be transmitted at most once, and if judging that the current voice packet scheduling fails, performing sliding operation on a receiving window of the RLC. When the retransmission times of the HARQ of the target fragment reach a threshold value, all fragments to be transmitted which are not transmitted completely in the current voice packet are obtained, and the fragments to be transmitted are transmitted at most once, so that the condition that the subsequent fragments finally fail to be transmitted even if the subsequent fragments occupy scheduling opportunities and scheduling resources is avoided; and when the current voice packet scheduling is judged to fail, performing sliding operation on a receiving window of the RLC to avoid the problem that the voice packet is submitted after the reordering timer is overtime.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a method and a device for processing HARQ retransmission of uplink enhanced RLC (radio link control) fragments.
Background
In an LTE (Long Term Evolution) mobile communication network, when a UE (User Equipment) is located at a cell edge, due to power limitation, uplink coverage capability is reduced, and a Voice packet of VOLTE (Voice Over LTE, Voice Service based on LTE) cannot be sent out within a TTI (Transmission Time Interval), a currently adopted method is uplink RLC (Radio Link Control protocol) segmentation, where a Voice packet RLC SDU (Service Data Unit) is segmented, so as to reduce an uplink Data amount per subframe, and improve a PRB power spectral density per PRB by reducing a Physical Resource Block (PRB) so that a base station is easier to demodulate. The voice packet is divided into multiple pieces to be transmitted in multiple sub-frames, if the HARQ (Hybrid Automatic Repeat reQuest) transmission of a certain piece fails, other pieces continue to be transmitted, even if the transmission of the other pieces is successful, the other pieces cannot form a complete voice packet delivery due to the loss of some pieces, and scheduling opportunities and scheduling resources of the other pieces are wasted.
When coverage of UE is limited at the edge of a cell, the BLER (Block Error Ratio) is very high due to the limitation of transmitting power, the UE carries out fragmentation on an RLC layer aiming at a voice packet, each fragmentation adopts an independent HARQ process to carry out transmission on an MAC (Media Access Control) layer, the number of PRBs (physical resource blocks) scheduled for each transmission is reduced after the fragmentation, the UE can concentrate the power on small PRBs, and the problem that the transmitting power of the UE is not enough is solved. But voice packets are transmitted in multiple sub-frames divided into multiple pieces. One voice packet is generated every 20ms, and if each voice packet cannot be completely transmitted within 20ms, the delay of the subsequent voice packets is accumulated continuously, thereby seriously affecting the voice quality. Therefore, an uplink RLC segmentation enhancement scheme is provided for voice user scheduling, the number of RLC segments is limited for weak field users, the air interface transmission delay of unit voice packets is reduced, the balance of packet loss caused by UE side delay and packet loss caused by air interface quality reasons is realized, VOLTE uplink coverage and user perception are improved, and the RLC segmentation enhancement scheme is described as follows: n is the number of bytes of a voice activation period packet, S is an RLC fragment number limit value, the limit value is set to be 4, 4 uplink scheduling opportunities are obtained within 20ms under the conventional configuration of a 3D1U subframe configuration 2, and the data volume of each fragment is calculated to be equal to (N + (S-1) x 3)/S x 8 bit. It should be noted that 3 in the above equation is the number of rlc and mac protocol header bytes increased every time a fragment is added. When the uplink RLC segmentation number of the UE is less than S, the RLC segmentation limit is not effective; when the uplink RLC segment number of the UE > the configuration threshold, the minimum value of the TBS for single uplink dynamic scheduling is limited by improving the MCS (Modulation and Coding Scheme, Modulation and Coding strategy), so as to limit the uplink RLC segment number of one voice packet to not exceed S.
However, the existing methods have the following disadvantages: for the edge user, when the RLC fragment enhancement algorithm is turned on, when one activated voice packet fragment is larger than 4, the MCS needs to be raised, the RLC fragments are reduced to 4, and one voice packet is scheduled and completed within 20ms, which may cause higher MCS level selection, increase of uplink BLER and increase of HARQ retransmission of the MAC layer. Assuming that one voice packet is divided into 4 fragments, L1 fails after the maximum number of transmissions, and the other L1 continues to transmit, even after the remaining fragments are successfully transmitted, they are discarded in the RLC layer due to the failure of fragmentation due to the loss of fragments. One of the consequences is that subsequent voice packets may be backlogged, which causes an increase in uplink voice delay to affect an MOS (Mean Opinion Score) value and a PDCP (Packet Data Convergence Protocol) DISCARD buffer overflow, thereby resulting in Packet loss. In addition, due to the loss of a voice packet, several PDUs (Protocol Data units) will be lost in the RLC reception window, and in the existing method, the RLC must wait until the time out of the reordering timer before submitting the subsequent voice packet, which causes the delay jitter of the voice packet.
Therefore, when the uplink voice user is scheduled in the existing method, when the RLC fragment enhancement scheme is started, the transmission of the first fragments fails, and the subsequent fragments are continuously scheduled, which greatly wastes the air interface scheduling opportunity and resources.
Disclosure of Invention
Because the existing method has the above problems, the embodiment of the present invention provides a HARQ retransmission processing method and apparatus for uplink enhanced RLC segments.
In a first aspect, an embodiment of the present invention provides a method for processing HARQ retransmission of an uplink enhanced RLC fragment, including:
in the transmission process of an uplink enhanced radio link layer control protocol (RLC) fragment, judging whether the retransmission times of a hybrid automatic repeat request (HARQ) of a target fragment reach a threshold value;
if the retransmission times of the HARQ of the target fragment reach a threshold value, acquiring all fragments to be transmitted which are not transmitted in the current voice packet except the target fragment;
and transmitting the fragments to be transmitted at most once, and if judging that the current voice packet scheduling fails, performing sliding operation on a receiving window of the RLC.
Optionally, each fragment is associated with a sequence number SN of the RLC layer, and each fragment includes location flag information;
the position mark information comprises the starting fragment, the middle fragment or the ending fragment of the voice packet;
accordingly, the target segment comprises the start segment and the intermediate segment.
Optionally, the method further comprises:
and if the judgment shows that the retransmission times of the HARQ of the ending fragment reach the threshold value and the previous fragment of the ending fragment is lost, informing the previous fragment of the ending fragment to continue retransmitting.
Optionally, the sliding operation on the receiving window of the RLC specifically includes:
sliding an acceptance window of the RLC to a target position, starting a reordering timer, and submitting a voice packet of the target position after the reordering timer is overtime;
and the target position is the sum of an unacknowledged mode receiving variable and the uplink RLC segment number of the UE.
Optionally, the threshold is determined according to the maximum number of subframes in the corresponding direction between the new transmission and the retransmission of the HARQ.
In a second aspect, an embodiment of the present invention further provides an apparatus for processing HARQ retransmission of an uplink enhanced RLC fragment, including:
the retransmission frequency judging module is used for judging whether the retransmission frequency of the hybrid automatic retransmission request HARQ of the target fragment reaches a threshold value or not in the transmission process of the RLC fragment of the uplink enhanced radio link layer control protocol;
a to-be-transmitted fragment obtaining module, configured to obtain all to-be-transmitted fragments that are not completely transmitted in a current voice packet except the target fragment if the number of retransmissions of the HARQ of the target fragment reaches a threshold;
and the receiving window sliding module is used for transmitting the fragments to be transmitted at most once, and if judging that the current voice packet scheduling fails, performing sliding operation on a receiving window of the RLC.
Optionally, each fragment is associated with a sequence number SN of the RLC layer, and each fragment includes location flag information;
the position mark information comprises the starting fragment, the middle fragment or the ending fragment of the voice packet;
accordingly, the target segment comprises the start segment and the intermediate segment.
Optionally, the apparatus further comprises:
and the retransmission notification module is used for notifying the previous fragment of the ending fragment to continue retransmission if the retransmission times of the HARQ of the ending fragment reach the threshold value and the previous fragment of the ending fragment is lost.
In a third aspect, an embodiment of the present invention further provides an electronic device, including:
at least one processor; and
at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, which when called by the processor are capable of performing the above-described methods.
In a fourth aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium storing a computer program, which causes the computer to execute the above method.
According to the technical scheme, when the retransmission times of the HARQ of the target fragment reach the threshold value, all fragments to be transmitted which are not transmitted in the current voice packet are obtained, and the fragments to be transmitted are transmitted at most once, so that the condition that the subsequent fragments finally fail to be transmitted even if the subsequent fragments occupy scheduling opportunities and scheduling resources is avoided; and when the current voice packet scheduling is judged to fail, performing sliding operation on a receiving window of the RLC to avoid the problem that the voice packet is submitted after the reordering timer is overtime.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart illustrating a HARQ retransmission processing method for uplink enhanced RLC segments according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an HARQ retransmission processing apparatus for uplink enhanced RLC segments according to an embodiment of the present invention;
fig. 3 is a logic block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Fig. 1 shows a flowchart of a HARQ retransmission processing method for uplink enhanced RLC (radio link control) segments provided in this embodiment, including:
s101, in the transmission process of the uplink enhanced radio link layer control protocol (RLC) fragment, whether the retransmission times of the hybrid automatic repeat request (HARQ) of the target fragment reach a threshold value is judged.
Each fragment is associated with a sequence number SN of the RLC layer, and each fragment includes location flag information.
The position mark information comprises the starting fragment, the middle fragment or the ending fragment of the voice packet.
Accordingly, the target segment comprises the start segment and the intermediate segment.
The threshold is determined according to the maximum number of the subframes in the corresponding direction between the new transmission and the retransmission of the HARQ, that is, the uplink HARQ number in a TDD (Time Division duplex) system is calculated according to the maximum number of the subframes in the corresponding direction between the new transmission and the retransmission of a certain HARQ.
S102, if the retransmission times of the HARQ of the target fragment reach a threshold value, all fragments to be transmitted which are not transmitted in the current voice packet except the target fragment are obtained.
In terms of distance, when the number of HARQ retransmissions of segment 2 reaches a threshold, and the current voice packet is divided into segment 3 and segment 4 except that the current voice packet is not completely transmitted, segment 3 and segment 4 are obtained.
S103, transmitting the fragments to be transmitted at most once, and if judging that the current voice packet scheduling fails, performing sliding operation on a receiving window of the RLC.
Specifically, when the non-last RLC fragment of a voice packet fails to be transmitted, the subsequent fragments are transmitted only once or need not be retransmitted.
In the prior art, all fragments of a voice packet must reach the configured maximum retransmission times, which wastes scheduling opportunities and air interface resources. In this embodiment, after the non-last fragment reaches the maximum retransmission number, other subsequent fragments are scheduled and transmitted only once (or not scheduled).
Specifically, when the UE starts the RLC fragment enhancement algorithm, when transmission of one activated voice packet fragment is performed, and when transmission failure occurs in a non-last fragment, and when transmission of a subsequent fragment is scheduled for the first time, the base station directly feeds back an ACK (Acknowledgement character) to the UE through a PHICH (Physical Hybrid ARQ Indicator Channel) to ignore possible transmission failure until transmission of all fragments of the current voice packet is completed.
In this embodiment, when it is determined that the number of retransmissions of the HARQ of a target segment reaches a threshold, all fragments to be transmitted that are not completely transmitted in a current voice packet are obtained, and the fragments to be transmitted are transmitted at most once again, so that a situation that the subsequent fragments eventually fail to be transmitted even if the subsequent fragments occupy scheduling opportunities and scheduling resources is avoided; and when the current voice packet scheduling is judged to fail, performing sliding operation on a receiving window of the RLC to avoid the problem that the voice packet is submitted after the reordering timer is overtime.
Further, on the basis of the above embodiment of the method, the method further comprises:
and S104, if the retransmission times of the HARQ of the ending fragment reach the threshold value and the previous fragment of the ending fragment is lost through judgment, informing the previous fragment of the ending fragment to continue retransmission.
Specifically, in the case of subframe configuration 2(3D1U), the subframe numbers of the uplink new transmission and the retransmission are always the same, for example, if the UE newly transmits some data in the 3# subframe, the retransmission will be performed in the 3# subframe of the next system frame, and the maximum number of uplink HARQ is equal to 2.
The Volte service RLC layer transmits in an UM (unacknowledged mode) mode without providing a retransmission function. The receiving window and the sending window are set in the RLC layer, when the fragments are scheduled by the MAC, each fragment is associated with a Serial Number (RLC) layer, and each fragment indicates a flag indicating whether the fragment is a beginning fragment, a middle fragment, or an end fragment of a voice packet. The specific RLC PDU format is found in protocol 3GPP TS 36.322. Because the number of the uplink HARQ is 2, the uplink is transmitted by two fragments at the same time.
Thus, in the RLC reception window, if a fragment SN is received during the transmission of a speech packet fragment, the SN is transmitted as a packet burstiParsing the fragment header, if it is the last voice fragment, and SNi-1 missing, notify SNi-1 continue scheduling. If the last voice packet has been transmitted, i.e. the RLC receiving window vr (ur) -1 is the last segment of the last voice packet, the SN is the SN after the maximum retransmission number of one of the two currently scheduled HARQ scheduling processes failsi，SNi+1 if one of the transmissions fails to reach the maximum retransmission times, the SNi+2、SNiAnd when the terminal performs +3 scheduling, the base station directly feeds back ACK to the terminal on the downlink PHICH of the air interface subframe +6 of the two fragmented scheduling. Wherein vr (ur) represents Variable Receive (UM Receive), that is, an unacknowledged mode Receive Variable, which represents the number of the current PDU to be received, corresponding to a fragment number SN.
When the next voice packet is scheduled, NDI in DCI0 does not flip, informing the UE to start transmitting a new voice packet. And the receiving window of the RLC slides to the uplink RLC segmentation number of VR (UR) + UE, namely the receiving window can slide after VR (R) fails to receive, instead of starting the VR (UR) reordering timer after the uplink RLC segmentation number of VR (UR) + UE is received, the voice packet of the uplink RLC segmentation number of VR (UR) + UE is submitted after the VR (UR) reordering timer times out.
Examples are as follows: suppose a slice L1In subframe 2 transmission of frame 1, L2In subframe 7 transmission of frame 1, L1NACK (packet loss retransmission), L, is fed back in subframe 8 of frame 11Retransmit 1 in subframe 2 of frame 2, retransmit 2 in subframe 2 of frame 3, retransmit 3 in subframe 2 of frame 4, and retransmit 4 in subframe 2 of frame 5, and then fail, assuming L2Retransmission 1 time on subframe 7 of frame 2, 2 times on subframe 7 of frame 3, 3 times on subframe 7 of frame 4, and 4 times on subframe 7 of frame 5. L is3And L4Scheduling of uplink subframes in frame 6 and subsequent frames follows, even if L3And L4The fragment transmission is successfully delivered to the RLC layer, which will also be due to L1Loss results in failure to collect 4 pieces and discard L2、L3And L4. If L is3And L4There are also multiple retransmissions (default configuration is 5 HARQ transmissions), 10 uplink scheduling opportunities and resources within 50ms are wasted.
In this embodiment, the RLC determines L2Corresponding SN2Successful reception, SN1After transmission failure, L3And L4Transmitting 1 time on 2 and 7 of frame 6, the base station feeds back ACK to the terminal, and transmission of the next voice packet can start on frame 7, wasting 1 frame 10ms at most. And moving the RLC receiving window to the uplink RLC subsection number of VR (UR) + UE, without submitting the uplink RLC subsection number voice packet of VR (UR) + UE after the VR (UR) reordering timer is overtime after the uplink RLC subsection number of VR (UR) + UE is successfully received.
In this embodiment, when one of the two currently scheduled HARQ scheduling processes fails to reach the maximum retransmission time, that is, the SN isi，SNi+1 if one of the transmissions fails to reach the maximum retransmission times, the SNi+2、SNiWhen scheduling +3, the RLC protocol layer starts to send the next voice packet, and vt (us) starts to manage the next voice packet, i.e. when the base station schedules the following voice fragment, it transfers a new voice packet fragment.
In the case of the optimized mode, the RLC determines L2Corresponding SN2Successful reception, SN1Starting the next speech packet directly on frames 6, 2 and 7 after a transmission failureThe transmission of the first and second slices, the optimization mode continues to save two scheduling opportunities within 10 ms.
Further, on the basis of the foregoing method embodiment, the sliding operation on the receiving window of the RLC in S103 specifically includes:
and sliding an RLC receiving window to a target position, starting a reordering timer, and submitting the voice packet of the target position after the reordering timer is overtime.
And the target position is the sum of an unacknowledged mode receiving variable and the uplink RLC segment number of the UE.
Specifically, in the prior art, when a voice packet with SN of i +1 is received and a voice packet with SN of i is not received, a reordering timer is started for the packet with SN of i, and the voice packet with SN of i is submitted to an upper layer protocol only after the reordering timer is overtime, so that voice delay and jitter are large. In this embodiment, when the voice packet with SN of i is not received, the lower edge of the RLC receiving window is directly slid to the uplink RLC segment number of vr (ur) + UE, and it is not necessary to wait until the subsequent message is received, and then start the reordering timer, and then submit the message to the core network after timeout, thereby reducing the time delay of submitting the voice packet.
Fig. 2 shows a schematic structural diagram of an apparatus for processing HARQ retransmission of uplink enhanced RLC segments according to this embodiment, where the apparatus includes: a retransmission number judging module 201, a to-be-transmitted fragment acquiring module 202, and a receiving window sliding module 203, wherein:
the retransmission frequency judging module 201 is configured to judge whether the retransmission frequency of the HARQ of the target segment reaches a threshold value in the transmission process of the RLC segment;
the to-be-transmitted fragment acquiring module 202 is configured to acquire all to-be-transmitted fragments that are not completely transmitted in the current voice packet except the target fragment if the number of retransmissions of the HARQ of the target fragment reaches a threshold;
the receiving window sliding module 203 is configured to transmit the to-be-transmitted segment at most once, and if it is determined that the current voice packet scheduling fails, perform a sliding operation on a receiving window of the RLC.
Specifically, the retransmission number determining module 201 determines whether the retransmission number of the HARQ of the target segment reaches a threshold value in the transmission process of the RLC segment; the to-be-transmitted fragment acquiring module 202 acquires all to-be-transmitted fragments that are not completely transmitted in the current voice packet except the target fragment if the number of retransmissions of the HARQ of the target fragment reaches a threshold; the receiving window sliding module 203 transmits the segment to be transmitted at most once, and if it is determined that the current voice packet scheduling fails, performs a sliding operation on the receiving window of the RLC.
In this embodiment, when it is determined that the number of retransmissions of the HARQ of a target segment reaches a threshold, all fragments to be transmitted that are not completely transmitted in a current voice packet are obtained, and the fragments to be transmitted are transmitted at most once again, so that a situation that the subsequent fragments eventually fail to be transmitted even if the subsequent fragments occupy scheduling opportunities and scheduling resources is avoided; and when the current voice packet scheduling is judged to fail, performing sliding operation on a receiving window of the RLC to avoid the problem that the voice packet is submitted after the reordering timer is overtime.
Further, on the basis of the above device embodiment, each slice is associated with a sequence number SN of an RLC layer, and each slice includes location flag information;
the position mark information comprises the starting fragment, the middle fragment or the ending fragment of the voice packet;
accordingly, the target segment comprises the start segment and the intermediate segment.
Further, on the basis of the above embodiment of the apparatus, the apparatus further comprises:
and the retransmission notification module is used for notifying the previous fragment of the ending fragment to continue retransmission if the retransmission times of the HARQ of the ending fragment reach the threshold value and the previous fragment of the ending fragment is lost.
The HARQ retransmission processing apparatus for uplink enhanced RLC segments according to this embodiment may be configured to execute the foregoing method embodiments, and the principle and technical effect are similar, which are not described herein again.
Referring to fig. 3, the electronic device includes: a processor (processor)301, a memory (memory)302, and a bus 303;
wherein the content of the first and second substances,
the processor 301 and the memory 302 complete communication with each other through the bus 303;
the processor 301 is configured to call program instructions in the memory 302 to perform the methods provided by the above-described method embodiments.
The present embodiments disclose a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the methods provided by the above-described method embodiments.
The present embodiments provide a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform the methods provided by the method embodiments described above.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed 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 modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
It should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A HARQ retransmission processing method of uplink enhanced RLC (radio Link control) fragments is characterized by comprising the following steps:
in the transmission process of an uplink enhanced radio link layer control protocol (RLC) fragment, judging whether the retransmission times of a hybrid automatic repeat request (HARQ) of a target fragment reach a threshold value;
if the retransmission times of the HARQ of the target fragment reach a threshold value, acquiring all fragments to be transmitted which are not transmitted in the current voice packet except the target fragment;
and transmitting the fragments to be transmitted at most once, and if judging that the current voice packet scheduling fails, performing sliding operation on a receiving window of the RLC.
2. The method of claim 1, wherein each slice is associated with a sequence number, SN, of an RLC layer, and each slice includes location flag information;
the position mark information comprises the starting fragment, the middle fragment or the ending fragment of the voice packet;
accordingly, the target segment comprises the start segment and the intermediate segment.
3. The method of claim 2, further comprising:
and if the judgment shows that the retransmission times of the HARQ of the ending fragment reach the threshold value and the previous fragment of the ending fragment is lost, informing the previous fragment of the ending fragment to continue retransmitting.
4. The method according to claim 1, wherein the sliding operation of the RLC reception window specifically includes:
sliding an acceptance window of the RLC to a target position, starting a reordering timer, and submitting a voice packet of the target position after the reordering timer is overtime;
and the target position is the sum of an unacknowledged mode receiving variable and the uplink RLC segment number of the UE.
5. The method of claim 1, wherein the threshold is determined according to a maximum number of subframes in a corresponding direction between a new transmission and a retransmission of the HARQ.
6. An apparatus for processing HARQ retransmission of uplink enhanced RLC (radio link control) segments, comprising:
the retransmission frequency judging module is used for judging whether the retransmission frequency of the hybrid automatic retransmission request HARQ of the target fragment reaches a threshold value or not in the transmission process of the RLC fragment of the uplink enhanced radio link layer control protocol;
a to-be-transmitted fragment obtaining module, configured to obtain all to-be-transmitted fragments that are not completely transmitted in a current voice packet except the target fragment if the number of retransmissions of the HARQ of the target fragment reaches a threshold;
and the receiving window sliding module is used for transmitting the fragments to be transmitted at most once, and if judging that the current voice packet scheduling fails, performing sliding operation on a receiving window of the RLC.
7. The apparatus of claim 6, wherein each slice is associated with a Sequence Number (SN) of an RLC layer, and each slice comprises location flag information;
the position mark information comprises the starting fragment, the middle fragment or the ending fragment of the voice packet;
accordingly, the target segment comprises the start segment and the intermediate segment.
8. The apparatus of claim 7, further comprising:
and the retransmission notification module is used for notifying the previous fragment of the ending fragment to continue retransmission if the retransmission times of the HARQ of the ending fragment reach the threshold value and the previous fragment of the ending fragment is lost.
9. An electronic device, comprising:
at least one processor; and
at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1 to 5.
10. A non-transitory computer-readable storage medium storing a computer program that causes a computer to perform the method according to any one of claims 1 to 5.
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| CN115694728A (en) * | 2020-09-18 | 2023-02-03 | 华为技术有限公司 | Line coding method and device |
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