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Method and device for enhancing RLC (Radio Link Control) acknowledgement mode under retransmission overrun and dual unconditions

A confirmation mode and unconditional technology, applied in wireless communication, electrical components, advanced technology, etc., can solve the problems of delayed retransmission of messages and failure to trigger status reports in time, so as to avoid connection reconstruction, reduce protocol pause time, and enhance performance Effect

Pending Publication Date: 2022-06-03
PURPLE MOUNTAIN LAB
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The present invention provides a method and device for enhancing the RLC confirmation mode when retransmission exceeds the limit and double unconditional, which is used to solve the problem of immediately disconnecting the RLC or even all the air interface protocols of the corresponding terminal when individual messages exceed the maximum number of retransmissions. Under no conditions, when t-PollRetransmit expires, when the message with the largest message sequence number SN (Sequence Number) is selected for retransmission to carry Polling, the status report cannot be triggered in time, resulting in delayed retransmission of messages that have not received positive confirmation problems, effectively improve the terminal communication rate and reliability, and trigger the receiving end to send status messages as soon as possible to avoid side effects

Method used

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  • Method and device for enhancing RLC (Radio Link Control) acknowledgement mode under retransmission overrun and dual unconditions
  • Method and device for enhancing RLC (Radio Link Control) acknowledgement mode under retransmission overrun and dual unconditions
  • Method and device for enhancing RLC (Radio Link Control) acknowledgement mode under retransmission overrun and dual unconditions

Examples

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no. 1 example

[0072] In this embodiment, as figure 2 As shown in the figure, when an individual packet exceeds the maximum number of retransmissions, the method of sending a short packet containing the sequence number SN of the packet is used to quickly push the sending and receiving windows to slide forward, so as to avoid early reporting to RRC for air interface protocol reconnection.

[0073]In this embodiment, the number of retransmissions exceeding the maximum number of individual packets means that the sender has successfully sent other packets within a predefined time period (acknowledgement responses have been received), and these packets do not exceed the maximum retransmission times. number of times; the short message is a PDU in RLC AM mode, its data length is set to 0, and its sequence number SN is the sequence number of the PDU that exceeds the maximum number of retransmissions; the pushing the sending window to slide forward refers to The lower edge TX_Next_Ack of the sending...

no. 2 example

[0077] In this embodiment, as image 3 As shown, in the RLC AM mode, the base station gNB transmits the data packets of the PDCP layer to the AM entity of the RLC layer according to the service characteristics to form the data to be sent by the RLC AM entity. The MAC layer of the gNB sender obtains data to be sent from entities such as the RLC layer AM as needed, and assembles one or more RLC PDUs into one MAC PDU. The RLC AM PDU formed by the data to be sent by the RLC AM entity includes fields such as SN, P, SI, SO, and data. The physical layer of the gNB transmitter sends the MAC PDU from the air interface to the UE receiver. The physical layer of the UE receiving end receives the message sent from the air interface, and after successful decoding, uploads it to the MAC layer. The MAC decapsulates the received message, obtains the AM PDU message, and uploads it to the AM entity of the RLC. Assume that the SN numbers contained in each AM PDU packet that are completely recei...

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Abstract

The invention provides a method and a device for enhancing an RLC (Radio Link Control) acknowledgement mode under retransmission overrun and dual unconditions. The method comprises the following steps: when the number of times of retransmitting a first message which is not received by a receiving end reaches a preset threshold value, recombining the first message into a short message and sending the short message to the receiving end; when the polling timer is overdue and double unconditions are met, a second message with the minimum message serial number is sent to the receiving end in a message set which does not receive the positive confirmation of the receiving end; wherein the double unconditions are that no data can be sent in the sending buffer area and the retransmission buffer area at the current moment, and new messages cannot be sent due to the fact that no vacancy exists in a sending window. The method is suitable for data transmission between the base station and the terminal, connection reestablishment is avoided or protocol dwell time is reduced under the condition that the message needs to be selected for retransmission when the message reaches the maximum retransmission frequency or a polling timer is overdue, and the data transmission performance between the base station and the terminal is effectively improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and in particular, to a method and a device for enhancing the RLC acknowledgment mode under retransmission overrun and double unconditional conditions. Background technique [0002] In the fifth generation new wireless system / fourth generation wireless system 5G / 4G (5th generation / 4th generation) wireless network, the base station gNB (gNodeB) and the terminal UE (User Equipment) communicate through the air interface protocol. The data packets received by the base station and the core network first pass through the packet data convergence protocol layer PDCP (Packet Data Convegence Protocol), after the IP (Internet Protocol) packet header compression and encryption, are transmitted to the radio link control layer RLC (Radio Link Control), Segmentation and concatenation are performed according to the transmission requirements of the media access control layer MAC (Media Acce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L47/10H04L47/27H04W28/04H04W28/06
CPCH04L1/1851H04L1/1883H04L47/27H04L47/29H04W28/04H04W28/065Y02D30/70
Inventor 沈庆国林杨韩小芳邱睿奇
Owner PURPLE MOUNTAIN LAB
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