Method for fast retransmission and feedback of RLC AM mode

A fast retransmission, mode technology, applied in the direction of error prevention/detection through transmission repetition, error prevention/detection using return channel, etc., can solve service transmission delay, small delay and reliable transmission performance, ARQ retransmission, etc. problem, to achieve the effect of reducing repeated RLC retransmission packet transmission, improving reliability and transmission stability

Inactive Publication Date: 2015-08-12
POTEVIO INFORMATION TECH
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Problems solved by technology

These will lead to interruption and delay of business transmission, and even lead to packet loss in severe cases
On the other hand, the RLC sending window has a length limit. If the feedback confirmation packet is delayed, it will also cause the sending window to be full and get stuck, which will cause the data sending to stop
From the above analysis, it can be seen that for high-reliability service transmission, the use of bidirectional link transmission with feedback confirmation requ

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  • Method for fast retransmission and feedback of RLC AM mode
  • Method for fast retransmission and feedback of RLC AM mode
  • Method for fast retransmission and feedback of RLC AM mode

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[0038] The method for rapid retransmission and feedback in the RLC AM mode provided in this application is optimized by the sending end and the receiving end. The sender interacts from two levels of MAC and RLC, carries out active identification and active retransmission of RLC retransmission data, and checks the RLC retransmission buffer to avoid repeated retransmissions. The receiving end optimizes the processing of state variables from the RLC layer, optimizes the start of the reordering timer and speeds up the sending of state feedback.

[0039] In order to make the technical principles, features, and technical effects of the technical solution of the present application clearer, the technical solution of the present application will be described in detail below in conjunction with specific embodiments.

[0040] The first aspect of the technical solution of the present application relates to the RLC PDU information exchange between the RLC and MAC layer at the transmitting end ...

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Abstract

The invention discloses a method for fast retransmission and feedback of a radio link control acknowledgement (RLC AM) mode. An RLC layer of a sending terminal sends data to an MAC layer of the sending terminal, while notifies RLC data information to the MAC layer; the MAC layer performs information binding of the RLC data information and an HARQ process identification number of a mixed automatic retransmission request used in a current sending process; the MAC layer of the sending terminal executes an HARQ process and sends data; if acknowledgement (ACK) is received, according to the HARQ process identification number, the RLC data information bound by the HARQ progress is reported to the RLC layer; if negative acknowledgement (NACK) is still received if the maximum HARQ retransmission is carried out, according to the HARQ process identification number, the RLC data information bound by the HARQ progress is reported to the RLC layer; and the RLC layer of the sending terminal receives the acknowledgement (ACK) back-fed from the RLC layer of the sending terminal, and notifies the incident and the corresponding RLC data information to the MAC layer.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a method for fast retransmission and feedback in Radio Link Control (RLC, Radio Link Control) Acknowledgment (AM) mode. Background technique [0002] In the 3G / 4G wireless communication system, the data packets received by the base station and the core network first pass through the Packet Data Convergence Protocol (PDCP, Packet Data Convergence Protocol) layer, and after being compressed and encrypted by the IP header, they are transferred to the RLC layer. After the transmission requirements of the access control (MAC, Media Access Control) layer are segmented and concatenated, they are transferred to the MAC layer, and finally form a wireless signal from the air interface and send it out. [0003] According to the characteristics and requirements of business transmission, data transmission is divided into transmission with connection confirmation g...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/16H04L1/08
Inventor 朱颖
Owner POTEVIO INFORMATION TECH
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