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Method for retransmitting control data unit of wireless link control protocol under affirmance mode

A wireless link control and data control technology, which is applied in the direction of electrical components, multiplex communication, code division multiplexing system, etc., can solve the problem of waste of retransmission resources, reduce retransmission overhead and save system Resources, the effect of improving bandwidth utilization

Inactive Publication Date: 2007-10-31
ZTE CORP
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Problems solved by technology

[0017] The technical problem to be solved by the present invention is to provide a method for retransmitting the control data unit of the radio link control protocol in acknowledgment mode, so as to solve the problem of waste of retransmission resources in the prior art in high-rate services

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  • Method for retransmitting control data unit of wireless link control protocol under affirmance mode
  • Method for retransmitting control data unit of wireless link control protocol under affirmance mode

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Embodiment Construction

[0035] The implementation of the technical solution will be described in further detail below in conjunction with the accompanying drawings:

[0036] The method of the present invention is mainly to add an RLC state variable (RLC State Variable) VT (TAG), and when the AMD PDU is sent (including retransmission), the VT (TAG) is marked with the system time label. If the NACK of this PDU is received, the difference between the current system time and the time tag VT (TAG) is calculated. If the difference is greater than the threshold TimeThreshold, the AMD PDU is retransmitted and the state variable VT (TAG) is updated, otherwise the repetition is abandoned. hair. In this way, the retransmission frequency of AMD PDUs can be reduced, and system resource and bandwidth utilization can be improved.

[0037]The setting of the threshold TimeThreshold is related to the network loopback delay of the Status Report interval in the RLC AM protocol. Among them, the Status Report interval is rela...

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Abstract

The invention discloses a retransmitting method of control data unit of wireless links control protocol in confirmation mode that comprises: adding state variable to control data unit, said state variable are labeled with system time tag during course of sending control data unit; if receiving the negative answer of said control data unit, then the difference between current system time and said time label is calculated, controlling the retransmitting of said control data unit by the difference value and decreasing the retransmitting frequency. The invention can resolves problems that the retransmitting resource is wasted in the WCDMA system, and bandwidth availability ratio can be increased effectively, resource of system can be saved.

Description

Technical field [0001] The invention relates to a wideband code division multiple access system, in particular to a control data unit retransmission strategy in a wireless network controller protocol confirmation mode. Background technique [0002] In the WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access) system, the RLC (Radio Link Control) protocol layer located in the RNC (Radio Network Controller) network element has three data transmission methods: transparent mode (TM), unconfirmed mode (UM) and confirmed mode (Acknowledged mode, AM). Among them, the AM mode guarantees the reliable transmission of data through the transmission-confirmation process between the data sender and the data receiver. The protocol architecture is shown in Figure 1. The data sending process is: [0003] a) Sender (transmitter) receives the RLC SDU (Service Data Unit) sent from the upper layer, and generates RLC PDU (Protocol Data Unit control data unit); [0004] ...

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Application Information

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IPC IPC(8): H04L1/16H04J13/00
CPCH04L1/18
Inventor 徐云翔
Owner ZTE CORP
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