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Data processing method and apparatus of wireless link control layer

A wireless link control and processing method technology, which is applied in the field of wireless link control layer data processing, can solve the problems of wasting memory at the receiving end, discarding PDUs, detecting PDUs, etc., and achieves the effect of avoiding detection failure and small changes

Active Publication Date: 2008-07-23
ST ERICSSON SEMICON BEIJING
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  • Description
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Problems solved by technology

[0008]However, for duplicate received PDUs, regardless of the in-order delivery method or the out-of-order delivery method, there may be processing errors caused by detection failures
According to the existing regulations in the protocol, if the RLC receiving end receives a repeatedly received PDU (a PDU with the same sequence number has been received before), the PDU should be discarded; and in any delivery mode, the PDU is reassembled into an SDU After that, the receiving buffer is removed. If a PDU with the same sequence number is received at this time, the RLC receiving end will not be able to detect that the PDU has been received according to the PDU information stored in the receiving buffer, and will not be able to discard the duplicate PDU. On the one hand, the memory of the receiving end is wasted, and on the other hand, the receiving buffer is confused, which may eventually cause the reset of the sending end or the receiving end, affecting the quality of the wireless link

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  • Data processing method and apparatus of wireless link control layer
  • Data processing method and apparatus of wireless link control layer
  • Data processing method and apparatus of wireless link control layer

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Embodiment Construction

[0063] Before describing the embodiments of the present invention in detail, it is first necessary to understand the sliding window mechanism of the RLC entity in the acknowledged mode.

[0064] In acknowledgment mode, the RLC sending end and receiving end have sending windows and receiving windows respectively to realize the sliding window function. The following basic variables are defined in the RLC protocol to record the window state.

[0065] Among them, the basic variables of the sending end include:

[0066] Send state variable VT(S): Indicates the sequence number of the next PDU to be sent (excluding retransmitted PDUs);

[0067] Acknowledgment state variable VT(A): Indicates the sequence number of the next continuous PDU waiting for confirmation by the receiving end;

[0068] Maximum sending status variable VT(MS): PDUs whose sequence number is greater than or equal to VT(MS) will not be allowed to be sent; the length between VT(A) and VT(MS) is the size of the send...

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Abstract

The invention provides a wireless link control layer data treatment process and a device, wherein the process comprises detecting whether the PDU which is received is a step of repeated reception, and the step comprises recording missing PDU information, judging whether the PDU in the range of reception window which is received is received repeatedly according to the missing PDU information, and throwing away the PDU which is repeatedly received. The invention can accurately detect whether the PDU which is received in a repeated reception way according to the missing PDU information through recording the missing PDU information, thereby effectively avoiding the detection failure which is caused by removing relative PDU as the reconstruction of SDU is successful.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a data processing method and device for a radio link control layer. Background technique [0002] The wireless interface of the third generation mobile communication system (The 3rd Generation, 3G) is divided into three protocol layers: physical layer (Layer 1), data link layer (Layer 2) and network layer (Layer 3). The radio link control layer (Radio Link Control, RLC) is a part of the data link layer, which provides data transmission and reception services for the network layer, and guarantees the corresponding quality of service according to the requirements of the upper layer. The radio link control layer supports three working modes: Acknowledged Mode (Acknowledged Mode, AM), Unacknowledged Mode (Unacknowledged Mode, UM) and Transparent Mode (Transparent Mode, TM). Data reliability can be guaranteed through an Automatic Repeat ReQuest (ARQ) mechanism based on a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L1/00
Inventor 曹迎心
Owner ST ERICSSON SEMICON BEIJING
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