Method and device for solving recombination problem in WLAN

A register and receive buffer technology, applied in the field of network communication, can solve the problems of unpredictable MSDU/MMPDU, MSDU/MMPDU discarding, unpredictable total number of segments, etc., to achieve duplicate data and invalid data, low complexity, and improved The effect of space utilization

Inactive Publication Date: 2007-03-14
BEIJING CEC HUADA ELECTRONIC DESIGN CO LTD
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Problems solved by technology

[0008] (2) Send first STA_a sends a fragment frag_a1 of MSDUa, but then the sending is forced to be interrupted
[0021] (1) Although the capacity constraint can be satisfied, since the total number of segments and segment size of each MSDU / MMPDU cannot be predicted, it is necessary to pre-allocate the maximum possible segment size and number of segments, which creates space unnecessary waste of
[0022] (2) Again, because it is impossible to predict when a certain MSDU / MMPDU can be received completely, if the space is occupied by unfinished MSDU / MMPDU, then the newly arrived MSDU / MMPDU must be discarded, which will lead to extremely low efficiency

Method used

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  • Method and device for solving recombination problem in WLAN
  • Method and device for solving recombination problem in WLAN
  • Method and device for solving recombination problem in WLAN

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Embodiment Construction

[0062] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0063] The invention discloses a device for solving the MSDU / MMPDU segment reorganization problem in WLAN by fragmentation. The components include a receiving buffer area RxBuff, a fragmentation occupation register, a fragmentation management register, and a fragmentation index register, wherein:

[0064] The receiving buffer area is divided into N slices in units of M bytes for storing data of MSDU / MMPDU;

[0065] The slice occupation register is divided into N bits, wherein the I-th bit corresponds to the I-th slice of RxBuff, if the slice is occupied, then the position is 1, otherwise it is set to 0;

[0066] The fragment index register is divided into N records, and each record marks one of the data fragments of the MSDU / MMPDU and the index information of the subsequent data fragments.

[0067] The fragmentation management register is divided into K records, and...

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Abstract

This invention provides one method and device to realize WLAN MSDU / MMDU, which sends other MSDU / MMPDU sections through other STA competition due to send process is intercepted and receives different mixture sections with multiple terminals, wherein, the receive part processes the mixture section to output integral MSDU / MMPDU. The reset function device, which comprises one receive buffer RxBuff, one RxBuff occupation status register, one RxBuff slice data management register and one RxBuff slice index register.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a method and a device for solving the MSDU / MMDU reassembly problem in a WLAN by using a fragmentation method. Background technique [0002] In the WLAN wireless local area network, due to the complex network environment, in order to improve reliability, it is necessary to decompose the MSDU or MMDU into multiple segments of smaller length and send them. This procedure is called segmentation; each MSDU / MMPDU can be divided into 16 segments at most. segments. Each segment consists of frame header and frame body. The frame header is copied from MSDU / MMPDU, but the segment sequence number field and multi-segment field need to be set. The segment sequence number field of the first segment is 0, and the subsequent segments are incremented by 1 in sequence. The multi-segment field is set to 1 for all segments except the last segment which has the multi-segment field set to 0. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/28H04L45/60
Inventor 兰天
Owner BEIJING CEC HUADA ELECTRONIC DESIGN CO LTD
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