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Radio link control retransmission processing method and device

A technology of radio link control and processing method, applied in the field of radio link control retransmission processing methods and devices, can solve the problems of large system occupation of resources and complex L2 processing, so as to avoid resource occupation and simplify data retransmission functions. Effect

Inactive Publication Date: 2009-10-14
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of implementing the present invention, the inventor found that the existing retransmission mechanism caused L2 processing to be complicated and the system occupied a large amount of resources

Method used

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  • Radio link control retransmission processing method and device
  • Radio link control retransmission processing method and device
  • Radio link control retransmission processing method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] WCDMA (Wide-band Code Division Multiple Access, wideband code division multiple access system) R99 / R4 version adopts the traditional automatic repeat request ARQ (Automatic Repeat Request) method, the retransmission function is implemented in the RLC layer, due to the signaling And data needs to be transmitted between L1, L2, and L3, and a large time delay is required for retransmission of received data errors. In WCDMA R5 and subsequent versions, the HARQ (hybrid automatic retransmission request) function is added. HARQ is an error correction technology. Hybrid (Hybrid) means that it integrates forward error correction (FEC) (Forward Error Correction) and ARQ, the MAC layer entity (MAC-hs) can directly control the L1 retransmission, thereby increasing the transmission rate and reducing the delay, but the original L2 RLC retransmission mechanism is still If the L1 retransmission fails, it will cause the high speed downlink packet access HSDPA (High Speed ​​Downlink Pack...

Embodiment 2

[0020] The radio link control retransmission processing method provided in this embodiment includes:

[0021] Determine whether the RLC layer of L2 adopts the AM transmission mode. If the RLC layer adopts the AM mode, in the processing of the signaling, the L2 does not perform any processing on the RLC data response signaling transmitted from the uplink; in the data processing, the RLC data is not processed. for caching. It should be noted that the two measures of not processing the data response signaling and not caching the RLC data can realize the RLC retransmission function being turned off on the data link layer L2, and the two measures can be used alone or in combination. At the same time, in order to improve the compatibility with existing protocols, during the service establishment process, when one party is in AM transmission mode, the uplink and downlink transmission modes can be unified as AM mode. Utilizing this embodiment to close the retransmission function of t...

Embodiment 3

[0023] The entity model of the response mode is improved in the existing protocol of this embodiment, including:

[0024] figure 2 It is the model of the response mode entity in the existing 3GPP TS 25.322 protocol. The improved response mode entity is as follows image 3 As shown, in this embodiment, the UTRAN side downlink retransmission buffer and management unit (Retransmission buffer & management Unit) inside the response mode entity is deleted, and the corresponding retransmission information, such as information from the Demux / Routing module, from the Remove RLC The information of the header & Extract Piggybacked information module will not be processed. By deleting the retransmission buffer and the management unit and not processing the corresponding acknowledgment information, the RLC retransmission function can be disabled on the L2 layer based on the existing protocol. In addition, the MUX multiplexing unit, as a means of realizing the RLC retransmission function...

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Abstract

This inventive embodiment discloses a radio link control retransmission processing method, comprising the step of stopping the RLC retransmission on a data link layer L2 when the radio link control RLC uses an answering transmission mode. The other embodiment of the invention further discloses a radio link control retransmission processing device, comprising a judging module and a control module, wherein the judging module is used for judging whether the radio link control RLC layer uses the answering transmission mode, and the control module is used for stopping the RLC retransmission on the data link layer L2 when the judging result of the judging module is that the radio link control RLC layer uses the answering transmission mode. The embodiment of the invention simplifies the L2 RLC data retransmission function at the AM mode in a HSDPA downlink system and avoids the RLC retransmission function occupying the source.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a radio link control retransmission processing method and device. Background technique [0002] Wireless interface technology is the key technology of the third generation mobile communication. The wireless interface protocol structure of UMTS (Universal Mobile Telecommunications System) is as follows: figure 1 shown. It can be divided into physical layer L1 (Layer 1), data link layer L2 (Layer 2) and network layer L3 (Layer 3). The data link layer includes MAC (Medium Access Control) sublayer, radio link control RLC (Radio Link Control) sublayer, packet data convergence protocol PDCP (Packet Data Convergence Protocol) sublayer and broadcast / multicast control BMC (Broadcast / Multicast Control) sublayer, among which, there are three transmission modes of the RLC sublayer: Acknowledged AM (Acknowledged Mode) mode, Unacknowledged UM (Unacknowledged Mode) mode and Transparent ...

Claims

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Application Information

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IPC IPC(8): H04L1/08
CPCH04L1/1835H04L1/1812H04L1/1874
Inventor 孙强
Owner HUAWEI TECH CO LTD
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