CN117692107A - RLC data transmission method, device, computer equipment and readable medium - Google Patents

RLC data transmission method, device, computer equipment and readable medium Download PDF

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Publication number
CN117692107A
CN117692107A CN202211089129.5A CN202211089129A CN117692107A CN 117692107 A CN117692107 A CN 117692107A CN 202211089129 A CN202211089129 A CN 202211089129A CN 117692107 A CN117692107 A CN 117692107A
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China
Prior art keywords
message
sliding window
rlc data
rlc
layer
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Chinese (zh)
Inventor
董建军
贺保国
崔金龙
李东建
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ZTE Corp
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ZTE Corp
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Priority to CN202211089129.5A priority Critical patent/CN117692107A/en
Priority to PCT/CN2023/099653 priority patent/WO2024051240A1/en
Publication of CN117692107A publication Critical patent/CN117692107A/en
Pending legal-status Critical Current

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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
    • H04L1/1832—Details of sliding window management
    • 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
    • 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
    • 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
    • H04L1/1657—Implicit acknowledgement of correct or incorrect reception, e.g. with a moving window
    • 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
    • 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
    • H04L1/12—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
    • H04L1/187—Details of sliding window management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

The disclosure provides an RLC data transmission method, which is applied to an RLC data receiving device, and after receiving a message sent by an RLC data sending device, sends first feedback information to the RLC data sending device under the condition that a message hole exists in a first sliding window so as to enable the RLC data sending device to retransmit a corresponding hole message; under the condition that the existence of the target cavity message in the first sliding window is determined, the first sliding window is adjusted to delete the target cavity message from the first sliding window; and sending second feedback information to the RLC data sending device so that the RLC data sending device stops retransmitting the target hole message. The embodiment of the disclosure optimizes the RLC retransmission mechanism and the feedback mechanism, and simultaneously considers the real-time performance of the message transmission in UM mode and the reliability of the message transmission in AM mode. The disclosure also provides an RLC data transmitting apparatus, an RLC data receiving apparatus, a computer device, and a readable medium.

Description

RLC data transmission method, device, computer equipment and readable medium
Technical Field
The disclosure relates to the technical field of communication, and in particular relates to an RLC data transmission method, an RLC data transmission device, a computer device and a readable medium.
Background
RLC (Radio Link Control, radio link layer control protocol) is a radio link control layer protocol in a wireless communication system such as LTE (Long Term Evolution )/5G NR, in which the RLC layer is located above the MAC layer and is part of L2, and mainly provides services such as segmentation and retransmission of data.
Each RLC entity is divided into three modes of operation: transparent Mode (TM), unacknowledged Mode (UM), acknowledged Mode (AM), in TM mode, RLC send and receive entity do not carry on any processing to the message, the message is transmitted directly, therefore can't offer the reliability guarantee of any transmission; in UM mode, RLC sending and receiving entities package and reorganize the message, but do not provide any message retransmission mechanism, so the transmission reliability of the message cannot be guaranteed; in the AM mode, the RLC adopts an ARQ (Automatic Repeat reQuest, automatic retransmission request) mechanism to ensure the transmission reliability of the message, but the mechanism does not allow any message transmission failure, once a hole appears in a certain message transmission failure, a sending sliding window and a receiving sliding window can be clamped, the upper edge and the lower edge of the sliding window can not be continuously updated, meanwhile, a receiving end can continuously inform the sending end of retransmitting the hole message through a status report until the sending end reaches a maximum retransmission times threshold, and the flows of reestablishing, link release and the like are triggered.
Comparing the three transmission modes supported by the RLC protocol at present, in the TM mode, the RLC protocol layer carries out transparent transmission processing on the data, so that the user data cannot select to use the mode for transmission, and the mode is not considered; in UM mode, the RLC protocol layer has very high real-time performance in user data processing, but very poor reliability; in AM mode, the RLC protocol layer is highly reliable in user data processing, but is very poor in real-time. Therefore, an RLC data transmission scheme capable of simultaneously achieving both reliability and real-time performance of packet transmission is a current urgent need.
Disclosure of Invention
The present disclosure provides an RLC data transmission method, apparatus, computer device, and readable medium.
In a first aspect, an embodiment of the present disclosure provides an RLC data transmission method, which is applied to a radio link layer control protocol RLC data receiving apparatus, where the method includes:
receiving a message sent by an RLC data sending device;
under the condition that a message hole exists in a first sliding window, first feedback information is sent to the RLC data sending device, and the first feedback information is used for triggering the RLC data sending device to retransmit a corresponding hole message;
under the condition that the existence of a target cavity message in the first sliding window is determined, the first sliding window is adjusted to delete the target cavity message from the first sliding window, and the target cavity message is a cavity message with retransmission times larger than a preset threshold value;
And sending second feedback information to the RLC data sending device, wherein the second feedback information is used for triggering the RLC data sending device to stop retransmitting the target cavity message.
In yet another aspect, an embodiment of the present disclosure further provides an RLC data transmission method, which is applied to an RLC data transmitting apparatus, where the method includes:
transmitting a message to an RLC data receiving device, and storing the message in a third sliding window;
retransmitting a hole message corresponding to the first feedback information to the RLC data receiving device under the condition that the first feedback information sent by the RLC data receiving device is received;
and under the condition that second feedback information sent by the RLC data receiving device is received, adjusting the third sliding window to delete a target hole message corresponding to the second feedback information from the third sliding window and stop retransmitting the target hole message to the RLC data receiving device, wherein the target hole message is a hole message with retransmission times deleted from the first sliding window by the RLC data receiving device being larger than a preset threshold value.
In yet another aspect, an embodiment of the present disclosure further provides a data receiving apparatus, including a retransmission and feedback module and a first sliding window adjustment module, where the retransmission and feedback module is configured to receive a packet sent by an RLC data sending apparatus; under the condition that a message hole exists in a first sliding window, first feedback information is sent to the RLC data sending device, and the first feedback information is used for triggering the RLC data sending device to retransmit a corresponding hole message;
The first sliding window adjusting module is used for adjusting the first sliding window to delete the target hole message from the first sliding window under the condition that the target hole message exists in the first sliding window, and the target hole message is a hole message with retransmission times larger than a preset threshold value;
the retransmission and feedback module is further configured to send second feedback information to the RLC data transmitting apparatus, where the second feedback information is used to trigger the RLC data transmitting apparatus to stop retransmitting the target hole packet.
In yet another aspect, an embodiment of the present disclosure further provides a data transmitting device, including a message processing module, a message retransmission module, and a third sliding window adjustment module, where the message processing module is configured to send a message to an RLC data receiving device, and store the message in the third sliding window;
the message retransmission module is used for retransmitting a hole message corresponding to the first feedback information to the RLC data receiving device under the condition that the first feedback information sent by the RLC data receiving device is received;
the third sliding window adjusting module is configured to adjust the third sliding window when receiving the second feedback information sent by the RLC data receiving device, and is configured to delete a target hole packet corresponding to the second feedback information from the third sliding window, and stop retransmitting the target hole packet to the RLC data receiving device, where the target hole packet is a hole packet with a number of retransmissions deleted from the first sliding window by the RLC data receiving device greater than a preset threshold.
In yet another aspect, the disclosed embodiments also provide a computer device, comprising: one or more processors; a storage device having one or more programs stored thereon; the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the RLC data transfer method as described above.
In yet another aspect, the disclosed embodiments also provide a computer readable medium having a computer program stored thereon, wherein the program when executed implements the RLC data transmission method as described above.
The RLC data transmission method provided by the embodiment of the present disclosure is applied to an RLC data receiving device, and after receiving a message sent by the RLC data transmitting device, if a message hole exists in a first sliding window, first feedback information is sent to the RLC data transmitting device, so that the RLC data transmitting device retransmits the corresponding hole message; under the condition that the existence of the target cavity message in the first sliding window is determined, the first sliding window is adjusted to delete the target cavity message from the first sliding window, and the target cavity message is a cavity message with retransmission times larger than a preset threshold value; and sending second feedback information to the RLC data sending device so that the RLC data sending device stops retransmitting the target hole message. The embodiment of the disclosure optimizes an RLC retransmission mechanism and a feedback mechanism, provides a new RLC data transmission mode, and can simultaneously consider the real-time message transmission performance of UM mode and the message transmission reliability of AM mode.
Drawings
Fig. 1 is a schematic diagram of an RLC data transmission flow using an RLC data receiving apparatus as an execution body according to an embodiment of the present disclosure;
fig. 2 is a second schematic diagram of RLC data transmission flow using an RLC data receiving apparatus as an execution body according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of an LTE user plane protocol stack provided by an embodiment of the present disclosure;
fig. 4 is a schematic diagram of an NR user plane protocol stack provided by an embodiment of the present disclosure;
FIG. 5 is a schematic flow chart of cross-layer feedback provided by an embodiment of the present disclosure;
fig. 6 is a schematic diagram of RLC data transmission flow using an RLC data transmitting apparatus as an execution body according to an embodiment of the present disclosure;
fig. 7 is a flowchart of RLC data transmission in a 5G NR scenario according to an embodiment of the present disclosure;
fig. 8 is a flowchart of RLC data transmission in an LTE scenario according to an embodiment of the present disclosure;
fig. 9 is a schematic diagram of a structure of an RLC data receiving apparatus according to an embodiment of the present disclosure;
fig. 10 is a second schematic structural diagram of an RLC data receiving apparatus according to an embodiment of the present disclosure;
fig. 11 is a schematic diagram III of a structure of an RLC data receiving apparatus according to an embodiment of the present disclosure;
fig. 12 is a schematic structural diagram of an RLC data transmitting apparatus according to an embodiment of the present disclosure.
Detailed Description
Example embodiments will be described more fully hereinafter with reference to the accompanying drawings, but may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Embodiments described herein may be described with reference to plan and/or cross-sectional views with the aid of idealized schematic diagrams of the present disclosure. Accordingly, the example illustrations may be modified in accordance with manufacturing techniques and/or tolerances. Thus, the embodiments are not limited to the embodiments shown in the drawings, but include modifications of the configuration formed based on the manufacturing process. Thus, the regions illustrated in the figures have schematic properties and the shapes of the regions illustrated in the figures illustrate the particular shapes of the regions of the elements, but are not intended to be limiting.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The embodiment of the disclosure provides an RLC data transmission method, which is applied to an RLC data receiving device, as shown in fig. 1, and includes the following steps:
and step 11, receiving the message sent by the RLC data sending device.
The RLC data transmitting apparatus and the RLC data receiving apparatus may be a user equipment and a base station, and in the case where the RLC data transmitting apparatus is a base station, the RLC data receiving apparatus is a user equipment; in the case where the RLC data transmitting apparatus is a user equipment, the RLC data receiving apparatus is a base station. In this step, RLC PDU (Protocol Data Unit ) messages are transmitted between the RLC layer of the RLC data transmitter apparatus user plane and the RLC layer of the RLC data receiver apparatus user plane.
And step 12, under the condition that a message hole exists in the first sliding window, sending first feedback information to the RLC data sending device, wherein the first feedback information is used for triggering the RLC data sending device to retransmit a corresponding hole message.
The first sliding Window is set in the RLC layer of the RLC data receiving apparatus, the Window Size is fixed to a first length (rlc_window_size), the Window lower edge of the first sliding Window is rx_next, which represents RLC SN information that the RLC data receiving apparatus has not completely received the message at the earliest, and the Window upper edge of the first sliding Window is (rx_next+rlc_window_size).
The first feedback information may be sent to the RLC data transmitting apparatus via an RLC status feedback report, including an RLC SN of the hole message that requires retransmission by the RLC data transmitting apparatus.
And step 13, under the condition that the existence of the target cavity message in the first sliding window is determined, the first sliding window is adjusted to delete the target cavity message from the first sliding window, and the target cavity message is a cavity message with retransmission times larger than a preset threshold value.
In this step, if the number of retransmission times of the hole message in the first sliding window is greater than a preset threshold, the hole message with the number of retransmission times greater than the preset threshold is the target hole message, and the target hole message is deleted from the first sliding window by adjusting the position of the first sliding window.
The preset threshold is set depending on the characteristics of the type of the carried service, such as VONR (Voice over New Radio, new air interface carried audio)/VINR (Video over new radio, new air interface carried video) service used for carrying voice and video chat, and in order to prevent the Jitter Buffer (Jitter Buffer) of the application layer of the RLC data receiving apparatus from losing packets overtime, the preferred value suggestion of the preset threshold is less than or equal to 5.
Note that, the RLC data receiving apparatus may count the number of retransmissions of the hole packet.
And step 14, sending second feedback information to the RLC data sending device, wherein the second feedback information is used for triggering the RLC data sending device to stop retransmitting the target hole message.
The second feedback information may be sent to the RLC data transmitting apparatus via an RLC status feedback report, including an RLC SN of the hole message that requires the RLC data transmitting apparatus to stop retransmission.
The RLC data transmission method provided by the embodiment of the present disclosure is applied to an RLC data receiving device, and after receiving a message sent by the RLC data transmitting device, if a message hole exists in a first sliding window, first feedback information is sent to the RLC data transmitting device, so that the RLC data transmitting device retransmits the corresponding hole message; under the condition that the existence of the target cavity message in the first sliding window is determined, the first sliding window is adjusted to delete the target cavity message from the first sliding window, and the target cavity message is a cavity message with retransmission times larger than a preset threshold value; and sending second feedback information to the RLC data sending device so that the RLC data sending device stops retransmitting the target hole message. The embodiment of the disclosure optimizes an RLC retransmission mechanism and a feedback mechanism, provides a new RLC data transmission mode, and can simultaneously consider the real-time message transmission performance of UM mode and the message transmission reliability of AM mode.
In some embodiments, the adjusting the first sliding window to delete the target hole packet from the first sliding window (i.e. step 13) includes the following steps:
and 131, adjusting the lower edge of the first sliding window to a first position, wherein the first position is the position of the first message hole after the target hole message, and the retransmission times of the hole message corresponding to the first message hole are smaller than or equal to the threshold value.
And 132, determining a second position according to the first position and a preset first length, wherein the first length is the length of the first sliding window.
Second location=rx_next+rlc_window_size, where rx_next is the first location where the lower edge of the first sliding Window is located, and rlc_window_size is the length of the first sliding Window.
And step 133, adjusting the upper edge of the first sliding window to the second position.
In some embodiments, as shown in fig. 2, after receiving the message sent by the RLC data transmitting apparatus (i.e. step 11), the RLC data transmission method further includes the steps of:
step 21, in case that the message is a continuous message, delivering the message continuously to a packet data convergence protocol PDCP layer of the RLC data receiving device.
The continuous messages refer to that no holes occur in a plurality of data messages in the data packets sent by the RLC data transmitting apparatus, and in this case, the RLC layer of the RLC data receiving apparatus continuously delivers the continuous messages to its PDCP layer.
And step 22, adjusting the first sliding window according to the message.
In the step, the lower edge of the first sliding window is adjusted to the position of a first message hole after the last message in the continuous messages, wherein the retransmission times of the hole messages corresponding to the first message hole are smaller than or equal to the threshold value; and determining the adjusted upper edge position of the first sliding window according to the adjusted lower edge position of the first sliding window and the preset first length, and adjusting the upper edge of the first sliding window to the adjusted upper edge position.
Steps 21-22 are procedures in which the RLC data receiving apparatus normally delivers a message to the upper layer (PDCP layer) and normally slides the first sliding window in the present layer (RLC layer).
The RLC data transmission method of the embodiments of the present disclosure may be applied to LTE scenarios and 5G NR scenarios, fig. 3 is a schematic diagram of an LTE user plane protocol stack provided by the embodiments of the present disclosure, and fig. 4 is a schematic diagram of an NR user plane protocol stack provided by the embodiments of the present disclosure.
As shown in fig. 3, the LTE user plane protocol stack is, in order from top to bottom: a PDCP layer, an RLC layer, a MAC (Medium Access Control ) layer, a PHY (Physical) layer, wherein the PDCP layer is used for compression/decompression, ciphering/deciphering; the RLC layer is used for segmentation/concatenation; the MAC layer is used for multiplexing/demultiplexing and scheduling.
As shown in fig. 4, the SDAP layer is added to the 5G NR user plane protocol stack compared to the LTE user plane protocol stack, and the following steps are from top to bottom: SDAP (Service Data Adaptation Protocol), traffic data adaptation protocol) layer, PDCP layer, RLC layer, MAC layer, PHY layer. The PDCP layer in the 5G NR user plane protocol stack has a packet synchronization mechanism added to the PDCP layer of the LTE user plane protocol stack, and therefore, the RLC layer in the 5G NR user plane protocol stack has a cross-layer feedback mechanism added to the RLC layer of the LTE user plane protocol stack.
The cross-layer feedback mechanism in the 5G NR scenario is described in detail below in conjunction with fig. 5. In the case that the RLC data transmitting apparatus and the RLC data receiving apparatus are 5G NR devices, as shown in fig. 5, after adjusting the first sliding window (i.e. step 13) if it is determined that the number of retransmissions of the hole packet is greater than the preset threshold, the RLC data transmission method further includes the following steps:
and step 51, generating cross-layer feedback information according to the target cavity message.
The cross-layer feedback information is a sequence number (PDCP SN) of the message in the PDCP layer, the PDCP layer and the RLC layer adopt respective message sequence number codes, and the PDCP layer cannot identify the sequence number (RLC SN) of the RLC layer, so that in the step, the RLC layer generates the sequence number (PDCP SN) of the PDCP layer according to the sequence number (RLC SN) of the target hole message RLC layer, and the cross-layer feedback information is obtained. That is, the cross-layer feedback message is a hole message that the RLC layer notifies the PDCP layer that has been lost and does not need to wait, and specifically, the feedback message needs to include PDCP SN information of all RLC layer target hole messages that currently exceed a preset threshold of the number of retransmissions.
Step 52, transmitting the cross-layer feedback information to the PDCP layer of the RLC data receiving apparatus.
In this step, the RLC layer synchronizes the cross-layer feedback information to the PDCP layer to notify the PDCP layer of the deleted target hole message.
Step 53, adjusting a second sliding window in the PDCP layer according to the cross-layer feedback information, so as to delete the corresponding target hole packet from the second sliding window.
The second sliding Window is set in the PDCP layer of the RLC data transmitting apparatus, the Window Size is fixed to a second length (pdcp_window_size), the Window lower edge of the second sliding Window is rx_deliv, which represents PDCP SN information of the earliest hole packet to be reordered received by the PDCP layer, and the Window upper edge of the second sliding Window is (rx_deliv+pdcp_window_size).
In this step, the second sliding window is updated in the PDCP layer in a sliding manner, and the target hole packet (i.e., the hole packet with the retransmission number greater than the preset threshold) deleted from the first sliding window is deleted from the second sliding window.
In some embodiments, the cross-layer feedback information includes a sequence number (PDCP SN) of the target hole packet in the PDCP layer, and the generating the cross-layer feedback information according to the target hole packet (i.e. step 51) includes the following steps: determining the sequence number (LostPacket_Pdcp_Sn) of the target hole message in the PDCP layer according to the sequence number (LostPacket_ Rlc _Sn) of the target hole message in the RLC layer, the sequence number (AccectPacket_ Rlc _Sn) of the last received message before the target hole message in the RLC layer, the sequence number (AccectPacket_Pdcp_Sn) of the last received message before the target hole message in the PDCP layer, the preset PDCP layer sequence number maximum value (L1) and the preset RLC layer sequence number maximum value (L2).
In some embodiments, the determining the sequence number of the target hole message in the PDCP layer (lostpacket_pdcp_sn) according to the sequence number of the target hole message in the RLC layer (lostpacket_ Rlc _sn), the sequence number of the last received message in the RLC layer before the target hole message (accetpacket_ Rlc _sn), the sequence number of the last received message in the PDCP layer before the target hole message (accetpacket_pdcp_sn), the preset maximum value of the sequence number of the PDCP layer (L1) and the preset maximum value of the sequence number of the RLC layer (L2) includes:
judging whether the sequence number (LostPacket_ Rlc _Sn) of the target hole message in the RLC layer is overturned or not according to the sequence number (LostPacket_ Rlc _Sn) of the target hole message in the RLC layer and the sequence number (AcceptPacket_ Rlc _Sn) of the last received message in the RLC layer before the target hole message; based on the judging result of whether the overturn occurs, calculating the sequence number (LostPacket_Pdcp_Sn) of the target hole message in the PDCP layer according to the sequence number (LostPacket_ Rlc _Sn) of the target hole message in the RLC layer, the sequence number (AcceptPacket_Pdcp_Sn) of the last received message in the RLC layer before the target hole message, the sequence number (AcceptPacket_Pdcp_Sn) of the last received message in the PDCP layer before the target hole message, the preset maximum value (L1) of the PDCP layer sequence number and the preset maximum value (L2) of the RLC layer sequence number.
Wherein, in response to the sequence number (lostpacket_ Rlc _sn) of the target hole packet in the RLC layer being greater than the sequence number (accetpacket_ Rlc _sn) of the last received packet in the RLC layer before the target hole packet, indicating that the sequence number (lostpacket_ Rlc _sn) of the target hole packet in the RLC layer is flipped, the sequence number (lostpacket_pdcp_sn) of the target hole packet in the PDCP layer is calculated according to the following formula (1):
LostPacket_Pdcp_Sn＝[AcceptPacket_Pdcp_Sn+(LostPacket_Rlc_Sn-AcceptPacket_Rlc_Sn)]％2 L1 (1)
in response to the sequence number (lowtpacket_ Rlc _sn) of the target hole message at the RLC layer being less than or equal to the sequence number (accetpacket_ Rlc _sn) of the target hole message at the RLC layer, indicating that the sequence number (lowtpacket_ Rlc _sn) of the target hole message at the RLC layer has not been flipped, calculating the sequence number (lowtpacket_pdcp_sn) of the target hole message at the PDCP layer according to the following formula (2):
LostPacket_Pdcp_Sn＝[AcceptPacket_Pdcp_Sn+(LostPacket_Rlc_Sn+2 L2 -AcceptPacket_Rlc_Sn)]％2 L1 (2)
in some embodiments, the adjusting the second sliding window in the PDCP layer according to the cross-layer feedback information (i.e., step 53) includes the steps of: the lower edge of a second sliding window in the PDCP layer is adjusted to a third position, wherein the third position is the position of a first message waiting for reordering after the target hole message; determining a fourth position according to the third position and a preset second length, wherein the second length is the length of the second sliding window; and adjusting the upper edge of the second sliding window to a fourth position.
In some embodiments, after transmitting the cross-layer feedback information to the PDCP layer of the RLC data receiving apparatus (i.e., step 52), the RLC data transmission method further includes the steps of: and delivering the target cavity message to an upper layer of the PDCP layer in the process of adjusting the second sliding window in the PDCP layer. As shown in fig. 4, the upper layer of the PDCP layer is an SDPAP layer, and in this step, in the sliding process of the second sliding window, the outbound message (i.e. the target hole message) is forcibly delivered, so that the message can be delivered more efficiently.
According to different service type characteristics, the embodiment of the disclosure presets a threshold value of the retransmission times of each cavity message in a first sliding window of an RLC receiving end, provides the same retransmission opportunity for each cavity message on the basis, and can immediately trigger the updating of the first sliding window without waiting and depending on other messages after the retransmission times of a certain message reach the threshold value of the retransmission times, namely, if RLC SN information of the cavity message reaching the retransmission times contains RX_Next, the first sliding window is forcedly updated, so that the lower edge RX_Next of the first sliding window is updated into a cavity position which is the latest and does not reach the retransmission times, and meanwhile, the upper edge of the first sliding window also slides backwards along with the other messages. And then, selectively constructing and transmitting cross-layer feedback information from the RLC layer to the PDCP layer, wherein the cross-layer feedback information comprises PDCP SN information of the hole message which is confirmed to be lost due to the exceeding retransmission times, so that the forced updating of the third sliding window of the PDCP layer is triggered in linkage, namely if the PDCP SN information of the hole message which is confirmed to be lost contains RX_DELIV, the third sliding window is forcedly updated, so that the lower edge (RX_DELIV) of the third sliding window is updated to be the position of a discontinuous message which is nearest to the lower edge, and meanwhile, the upper edge of the third sliding window also slides backwards along with the PDCP SN information.
The embodiment of the disclosure also provides an RLC data transmission method, which is applied to an RLC data transmitting apparatus, as shown in fig. 6, and includes the following steps:
step 61, sending the message to the RLC data receiving device, and storing the message in the third sliding window.
The third sliding Window is set in the RLC layer of the RLC data transmitting apparatus, the Window Size is fixed to the first length (rlc_window_size), the Window lower edge of the third sliding Window is tx_next_ack, which represents RLC SN information that is transmitted by the RLC data transmitting apparatus earliest but not received by the Ack feedback message, and the Window upper edge of the third sliding Window is (tx_next_ack+rlc_window_size).
Step 62, when receiving the first feedback information sent by the RLC data receiving apparatus, retransmitting the hole packet corresponding to the first feedback information to the RLC data receiving apparatus.
The first feedback information may be carried in an RLC status feedback report, and is sent to the RLC data transmitting apparatus by the RLC data receiving apparatus, including an RLC SN of the hole message that needs retransmission by the RLC data transmitting apparatus. In this step, the RLC data transmitting apparatus retransmits the hole message indicated in the RLC status feedback report to the RLC data receiving apparatus.
Step 63, under the condition that the second feedback information sent by the RLC data receiving apparatus is received, adjusting a third sliding window to delete the target hole packet corresponding to the second feedback information from the third sliding window, and stopping retransmitting the target hole packet to the RLC data receiving apparatus, where the target hole packet is a hole packet with the number of retransmissions deleted from the first sliding window by the RLC data receiving apparatus being greater than a preset threshold.
The second feedback information may be carried in an RLC status feedback report, where the RLC data receiving apparatus sends the second feedback information to the RLC data transmitting apparatus, including an RLC SN of a hole packet that requires the RLC data transmitting apparatus to stop retransmitting. In this step, the RLC data transmitting apparatus stops retransmitting the target hole packet with the number of retransmissions greater than the preset threshold indicated in the RLC status feedback report to the RLC data receiving apparatus.
The RLC data transmission method provided by the embodiment of the present disclosure is applied to an RLC data transmitting apparatus, and transmits a message to an RLC data receiving apparatus, and stores the message in a third sliding window; retransmitting a hole message corresponding to the first feedback information to the RLC data receiving device under the condition that the first feedback information sent by the RLC data receiving device is received; and under the condition that the second feedback information sent by the RLC data receiving device is received, adjusting a third sliding window to delete the target hole message corresponding to the second feedback information from the third sliding window and stop retransmitting the target hole message to the RLC data receiving device, wherein the target hole message is a hole message with the retransmission times deleted from the first sliding window by the RLC data receiving device being larger than a preset threshold value. The embodiment of the disclosure optimizes an RLC retransmission mechanism and a feedback mechanism, provides a new RLC data transmission mode, and can simultaneously consider the real-time message transmission performance of UM mode and the message transmission reliability of AM mode.
In some embodiments, the adjusting the third sliding window is used for deleting the target hole packet corresponding to the second feedback information from the third sliding window (i.e. step 63), and includes the following steps:
in step 631, the lower edge of the third sliding window is adjusted to a fifth position, where the fifth position is the position of the next message to be retransmitted after the target hole message.
Step 632, determining a sixth position according to the fifth position and a preset first length, where the first length is the lengths of the third sliding window and the first sliding window.
Sixth position=tx_next_ack+rlc_window_size, where tx_next_ack is the fifth position where the lower edge of the third sliding Window is located, and rlc_window_size is the lengths of the third sliding Window and the first sliding Window.
Step 633, adjusting the upper edge of the third sliding window to the sixth position.
The RLC data transmission method of the embodiment of the disclosure can be applied to services with very high real-time requirements and secondary reliability requirements, such as VONR/VINR/multicasting and the like.
The following is a detailed description of 2 specific examples for clarity of illustration of embodiments of the disclosure. Fig. 7 is a flowchart of RLC data transmission in a 5G NR scenario according to an embodiment of the present disclosure, where, as shown in fig. 7, the RLC data transmission method includes the following steps:
And step 1, after each time the RLC sending end entity sends an RLC PDU message, the RLC PDU message is placed in a third sliding window to be stored, and feedback of the opposite end is waited.
And step 2, if the RLC receiving end entity receives continuous RLC PDU messages, the message delivery is normally carried out on the PDCP layer of the upper layer, and meanwhile, the first sliding window of the layer normally slides, namely, the lower edge of the first sliding window is updated to the position of the nearest cavity after the continuous RLC PDU messages, and the upper edge of the first sliding window is updated.
And 3, when the RLC receiving end entity detects that the first sliding window has the cavity caused by the loss of the message, the opposite end RLC sending entity is informed to retransmit the cavity message by constructing and sending an RLC feedback state report, and meanwhile, the retransmission times of each cavity message are accumulated by one.
And 4, after the RLC transmitting end entity receives the feedback state report sent by the opposite end RLC receiving end entity, retransmitting the RLC PDU message carried in the feedback state report and needing to be retransmitted, wherein the retransmitted message is still placed in a third sliding window, and the upper edge and the lower edge of the third sliding window are kept unchanged.
And 5, when the RLC receiving end entity detects that the retransmission times of a certain hole message reach a specified retransmission threshold, the first sliding window is forcedly updated, namely, the lower edge of the first sliding window is updated to the nearest hole position which does not meet the specified retransmission threshold, and meanwhile, the upper edge of the first sliding window is pushed to be updated. And constructing and sending an RLC feedback state report, and notifying an opposite-end RLC sending entity to stop retransmission of the message.
And 6, after the RLC receiving end entity forcedly updates the first sliding window, the RLC layer needs to synchronously generate cross-layer feedback information from the RLC layer to the PDCP layer, and notifies the PDCP layer receiving end entity of the upper layer.
And 7, after receiving the cross-layer feedback information from the RLC layer to the PDCP layer, the PDCP receiving end entity forcedly updates the second sliding window, namely, aiming at the message carried in the cross-layer feedback information, and the PDCP receiving end entity does not need to wait again.
And 8, after receiving the RLC feedback status report (step 5) sent by the opposite RLC receiving end entity, the RLC sending end entity removes RLC PDU message information (SN of the message needing to stop retransmitting) carried in the RLC feedback status report from the third sliding window, and meanwhile, forcedly updates the third sliding window, that is, updates the lower edge of the third sliding window to the latest message still considering retransmitting, and simultaneously pushes the upper edge of the third sliding window to update.
It should be noted that, step 6 and step 8 may be performed in parallel.
Fig. 8 is a flowchart of RLC data transmission in an LTE scenario according to an embodiment of the present disclosure, where, as shown in fig. 8, the RLC data transmission method includes the following steps:
and step 1, after each time the RLC sending end entity sends an RLC PDU message, the RLC PDU message is placed in a third sliding window to be stored, and feedback of the opposite end is waited.
And step 2, if the RLC receiving end entity receives continuous RLC PDU messages, the message delivery is normally carried out on the PDCP layer of the upper layer, and meanwhile, the first sliding window of the layer normally slides, namely, the lower edge of the first sliding window is updated to the position of the nearest cavity after the continuous RLC PDU messages, and the upper edge of the first sliding window is updated.
And 3, when the RLC receiving end entity detects that the first sliding window has the cavity caused by the loss of the message, the opposite end RLC sending entity is informed to retransmit the cavity message by constructing and sending an RLC feedback state report, and meanwhile, the retransmission times of each cavity message are accumulated by one.
And 4, after the RLC transmitting end entity receives the feedback state report sent by the opposite end RLC receiving end entity, retransmitting the RLC PDU message carried in the feedback state report and needing to be retransmitted, wherein the retransmitted message is still placed in a third sliding window, and the upper edge and the lower edge of the third sliding window are kept unchanged.
And 5, when the RLC receiving end entity detects that the retransmission times of a certain hole message reach a specified retransmission threshold, the first sliding window is forcedly updated, namely, the lower edge of the first sliding window is updated to the nearest hole position which does not meet the specified retransmission threshold, and meanwhile, the upper edge of the first sliding window is pushed to be updated. And constructing and sending an RLC feedback state report, and notifying an opposite-end RLC sending entity to stop retransmission of the message.
And 6', after receiving the RLC feedback status report (step 5) sent by the opposite-end RLC receiving-end entity, the RLC sending-end entity removes the RLC PDU message information carried in the RLC feedback status report from the third sliding window, and meanwhile, forcedly updates the third sliding window, that is, updates the lower edge of the third sliding window to the latest message still considering retransmission, and simultaneously pushes the upper edge of the third sliding window to update.
Compared with the flow of RLC data transmission in a 5G NR scene, the flow of RLC data transmission in an LTE scene omits steps 6-7, namely, a cross-layer feedback mechanism is not provided, and the rest steps are the same.
Based on the same technical concept, the embodiment of the disclosure further provides an RLC data receiving apparatus, as shown in fig. 9, where the RLC data receiving apparatus includes a retransmission and feedback module 101 and a first sliding window adjustment module 102, where the retransmission and feedback module 101 is configured to receive a packet sent by the RLC data sending apparatus; and under the condition that a message hole exists in the first sliding window, sending first feedback information to the RLC data sending device, wherein the first feedback information is used for triggering the RLC data sending device to retransmit a corresponding hole message.
The first sliding window adjustment module 102 is configured to adjust the first sliding window, when it is determined that a target hole packet exists in the first sliding window, to delete the target hole packet from the first sliding window, where the number of retransmission times of the target hole packet is greater than a preset threshold value.
The retransmission and feedback module 101 is further configured to send second feedback information to the RLC data transmitting apparatus, where the second feedback information is used to trigger the RLC data transmitting apparatus to stop retransmitting the target hole packet.
In some embodiments, the first sliding window adjusting module 102 is configured to adjust a lower edge of the first sliding window to a first position, where the first position is a position of a first message hole after the target hole message, where a retransmission number of a hole message corresponding to the first message hole is less than or equal to the threshold; determining a second position according to the first position and a preset first length, wherein the first length is the length of the first sliding window; and adjusting the upper edge of the first sliding window to the second position.
In some embodiments, as shown in fig. 10, the RLC data receiving apparatus further includes a packet delivery module 103, where the packet delivery module 103 is configured to, in a case where the packet is a continuous packet, continuously deliver the packet to a packet data convergence protocol PDCP layer of the RLC data receiving apparatus.
The first sliding window adjusting module 102 is further configured to adjust the first sliding window according to the message.
In some embodiments, as shown in fig. 11, the RLC data receiving apparatus further includes a cross-layer feedback module 104 and a second sliding window adjustment module 105, where the cross-layer feedback module 104 is configured to generate cross-layer feedback information according to the target hole packet, and send the cross-layer feedback information to a PDCP layer of the RLC data receiving apparatus.
The second sliding window adjusting module 105 is configured to adjust a second sliding window in the PDCP layer according to the cross-layer feedback information, so as to delete a corresponding target hole packet from the second sliding window.
In some embodiments, the cross-layer feedback module 104 is configured to determine the sequence number of the target hole packet in the PDCP layer according to the sequence number of the target hole packet in the RLC layer, the sequence number of the last received packet in the RLC layer before the target hole packet, the sequence number of the last received packet in the PDCP layer before the target hole packet, a preset maximum value of PDCP layer sequence number, and a preset maximum value of RLC layer sequence number.
In some embodiments, the cross-layer feedback module 104 is configured to determine whether the sequence number of the target hole packet in the RLC layer is flipped according to the sequence number of the target hole packet in the RLC layer and the sequence number of the last received packet in the RLC layer before the target hole packet; and calculating the sequence number of the target hole message in the PDCP layer according to the sequence number of the target hole message in the RLC layer, the sequence number of the last received message in the RLC layer before the target hole message, the sequence number of the last received message in the PDCP layer before the target hole message, the preset PDCP layer sequence number maximum value and the preset RLC layer sequence number maximum value based on the judging result of whether the overturn occurs.
In some embodiments, the second sliding window adjusting module 105 is configured to adjust a lower edge of the second sliding window in the PDCP layer to a third position, where the third position is a position of a first packet waiting for reordering after the target hole packet; determining a fourth position according to the third position and a preset second length, wherein the second length is the length of the second sliding window; and adjusting the upper edge of the second sliding window to the fourth position.
In some embodiments, the packet delivery module 103 is further configured to deliver the target hole packet to an upper layer of the PDCP layer during the process of adjusting the second sliding window in the PDCP layer.
Based on the same technical concept, the embodiment of the disclosure further provides an RLC data transmitting apparatus, as shown in fig. 12, where the RLC data transmitting apparatus includes a message processing module 201, a message retransmission module 202, and a third sliding window adjusting module 203, where the message processing module 201 is configured to transmit a message to an RLC data receiving apparatus, and store the message in the third sliding window.
The message retransmission module 202 is configured to retransmit, to the RLC data receiving apparatus, a hole message corresponding to the first feedback information when the first feedback information sent by the RLC data receiving apparatus is received.
The third sliding window adjusting module 203 is configured to, when receiving the second feedback information sent by the RLC data receiving apparatus, adjust the third sliding window, and delete a target hole packet corresponding to the second feedback information from the third sliding window, and stop retransmitting the target hole packet to the RLC data receiving apparatus, where the target hole packet is a hole packet whose retransmission number deleted from the first sliding window by the RLC data receiving apparatus is greater than a preset threshold.
In some embodiments, the third sliding window adjusting module 203 is configured to adjust the lower edge of the third sliding window to a fifth position, where the fifth position is a position of a next message to be retransmitted after the target hole message; determining a sixth position according to the fifth position and a preset first length, wherein the first length is the length of the third sliding window and the first sliding window; and adjusting the upper edge of the third sliding window to the sixth position.
The disclosed embodiments also provide a computer device comprising: one or more processors and a storage device; wherein the storage device stores one or more programs, which when executed by the one or more processors, cause the one or more processors to implement the RLC data transfer method provided in the foregoing embodiments.
The disclosed embodiments also provide a computer readable medium having a computer program stored thereon, wherein the computer program when executed implements the RLC data transmission method as provided by the foregoing embodiments.
Those of ordinary skill in the art will appreciate that all or some of the steps of the methods, functional modules/units in the apparatus disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted in a generic and descriptive sense only and not for purpose of limitation. In some instances, it will be apparent to one skilled in the art that features, characteristics, and/or elements described in connection with a particular embodiment may be used alone or in combination with other embodiments unless explicitly stated otherwise. It will therefore be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the present invention as set forth in the following claims.

Claims (14)

1. An RLC data transmission method applied to a radio link layer control protocol RLC data receiving apparatus, the method comprising:
receiving a message sent by an RLC data sending device;
under the condition that a message hole exists in a first sliding window, first feedback information is sent to the RLC data sending device, and the first feedback information is used for triggering the RLC data sending device to retransmit a corresponding hole message;
under the condition that the existence of a target cavity message in the first sliding window is determined, the first sliding window is adjusted to delete the target cavity message from the first sliding window, and the target cavity message is a cavity message with retransmission times larger than a preset threshold value;
And sending second feedback information to the RLC data sending device, wherein the second feedback information is used for triggering the RLC data sending device to stop retransmitting the target cavity message.
2. The method of claim 1, wherein adjusting the first sliding window to delete the target hole message from within the first sliding window comprises:
the lower edge of the first sliding window is adjusted to a first position, wherein the first position is the position of a first message hole after the target hole message, and the retransmission times of the hole message corresponding to the first message hole are smaller than or equal to the threshold value;
determining a second position according to the first position and a preset first length, wherein the first length is the length of the first sliding window;
and adjusting the upper edge of the first sliding window to the second position.
3. The method of claim 1, wherein after receiving the message sent by the RLC data transmitting apparatus, the method further comprises:
continuously delivering the message to a packet data convergence protocol PDCP layer of the RLC data receiving device under the condition that the message is a continuous message;
and adjusting the first sliding window according to the message.
4. The method according to any one of claims 1-3, wherein the RLC data transmitting apparatus and the RLC data receiving apparatus are 5G NR devices, and after adjusting the first sliding window if it is determined that the number of retransmissions of the hole packet is greater than a preset threshold, the method further comprises:
generating cross-layer feedback information according to the target cavity message;
transmitting the cross-layer feedback information to a PDCP layer of the RLC data receiving apparatus;
and adjusting a second sliding window in the PDCP layer according to the cross-layer feedback information, and deleting the corresponding target cavity message from the second sliding window.
5. The method of claim 4, wherein the cross-layer feedback information comprises a sequence number of the target hole message at the PDCP layer, the generating cross-layer feedback information from the target hole message comprising:
determining the sequence number of the target hole message in the PDCP layer according to the sequence number of the target hole message in the RLC layer, the sequence number of the last received message in the RLC layer before the target hole message, the sequence number of the last received message in the PDCP layer before the target hole message, the preset PDCP layer sequence number maximum value and the preset RLC layer sequence number maximum value.
6. The method of claim 5 wherein said determining the sequence number of the target hole message at the PDCP layer based on the sequence number of the target hole message at the RLC layer, the sequence number of the most recent received message before the target hole message at the PDCP layer, a preset maximum value of PDCP layer sequence numbers, and a preset maximum value of RLC layer sequence numbers comprises:
judging whether the sequence number of the target hole message in the RLC layer is overturned or not according to the sequence number of the target hole message in the RLC layer and the sequence number of the last received message in the RLC layer before the target hole message;
and calculating the sequence number of the target hole message in the PDCP layer according to the sequence number of the target hole message in the RLC layer, the sequence number of the last received message in the RLC layer before the target hole message, the sequence number of the last received message in the PDCP layer before the target hole message, the preset PDCP layer sequence number maximum value and the preset RLC layer sequence number maximum value based on the judging result of whether the overturn occurs.
7. The method of claim 4, wherein the adjusting a second sliding window within the PDCP layer according to the cross-layer feedback information comprises:
the lower edge of a second sliding window in the PDCP layer is adjusted to a third position, wherein the third position is the position of a first message waiting for reordering after the target hole message;
determining a fourth position according to the third position and a preset second length, wherein the second length is the length of the second sliding window;
and adjusting the upper edge of the second sliding window to the fourth position.
8. The method of claim 4, wherein after transmitting the cross-layer feedback information to the PDCP layer of the RLC data receiving apparatus, the method further comprises:
and delivering the target hole message to an upper layer of the PDCP layer in the process of adjusting the second sliding window in the PDCP layer.
9. An RLC data transmission method, applied to an RLC data transmitting apparatus, comprising:
transmitting a message to an RLC data receiving device, and storing the message in a third sliding window;
retransmitting a hole message corresponding to the first feedback information to the RLC data receiving device under the condition that the first feedback information sent by the RLC data receiving device is received;
And under the condition that second feedback information sent by the RLC data receiving device is received, adjusting the third sliding window to delete a target hole message corresponding to the second feedback information from the third sliding window and stop retransmitting the target hole message to the RLC data receiving device, wherein the target hole message is a hole message with retransmission times deleted from the first sliding window by the RLC data receiving device being larger than a preset threshold value.
10. The method of claim 9, wherein the adjusting the third sliding window to delete the target hole packet corresponding to the second feedback information from the third sliding window comprises:
the lower edge of the third sliding window is adjusted to a fifth position, wherein the fifth position is the position of the next message to be retransmitted after the target cavity message;
determining a sixth position according to the fifth position and a preset first length, wherein the first length is the length of the third sliding window and the first sliding window;
and adjusting the upper edge of the third sliding window to the sixth position.
11. The RLC data receiving device is characterized by comprising a retransmission and feedback module and a first sliding window adjusting module, wherein the retransmission and feedback module is used for receiving a message sent by the RLC data sending device; under the condition that a message hole exists in a first sliding window, first feedback information is sent to the RLC data sending device, and the first feedback information is used for triggering the RLC data sending device to retransmit a corresponding hole message;
The first sliding window adjusting module is used for adjusting the first sliding window to delete the target hole message from the first sliding window under the condition that the target hole message exists in the first sliding window, and the target hole message is a hole message with retransmission times larger than a preset threshold value;
the retransmission and feedback module is further configured to send second feedback information to the RLC data transmitting apparatus, where the second feedback information is used to trigger the RLC data transmitting apparatus to stop retransmitting the target hole packet.
12. The RLC data transmitting device is characterized by comprising a message processing module, a message retransmission module and a third sliding window adjusting module, wherein the message processing module is used for transmitting a message to the RLC data receiving device and storing the message in the third sliding window;
the message retransmission module is used for retransmitting a hole message corresponding to the first feedback information to the RLC data receiving device under the condition that the first feedback information sent by the RLC data receiving device is received;
the third sliding window adjusting module is configured to adjust the third sliding window when receiving the second feedback information sent by the RLC data receiving device, and is configured to delete a target hole packet corresponding to the second feedback information from the third sliding window, and stop retransmitting the target hole packet to the RLC data receiving device, where the target hole packet is a hole packet with a number of retransmissions deleted from the first sliding window by the RLC data receiving device greater than a preset threshold.
13. A computer device, comprising:
one or more processors;
a storage device having one or more programs stored thereon;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the RLC data transfer method of any of claims 1-10.
14. A computer readable medium having stored thereon a computer program, wherein the program when executed implements the RLC data transmission method of any of claims 1-10.
CN202211089129.5A 2022-09-07 2022-09-07 RLC data transmission method, device, computer equipment and readable medium Pending CN117692107A (en)

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