Method for ending time update and its state detection of occupied channels in the wireless LAN

A wireless local area network and channel occupancy technology, applied in data exchange networks, digital transmission systems, electrical components, etc., can solve the problems of not considering communication collisions and poor compatibility, so as to solve compatibility problems, avoid communication collisions, and improve network efficiency. Effect

Inactive Publication Date: 2007-07-11
ZTE CORP
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Problems solved by technology

The main disadvantage of this method is: when adjusting NAV, the communication collision between different basic service sets is not considered; at the same time, the duration field is no longer the period from the beginning of the channel being occupied to the end of the occupation, and the compatibility is poor

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  • Method for ending time update and its state detection of occupied channels in the wireless LAN
  • Method for ending time update and its state detection of occupied channels in the wireless LAN
  • Method for ending time update and its state detection of occupied channels in the wireless LAN

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Embodiment Construction

[0058] Various preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0059] Fig. 3 is the schematic flow chart of refreshing site NAV by the method of the present embodiment. First, a general introduction is carried out to the refreshing process of site NAV, including the following steps:

[0060] Step 100, the listening station distinguishes the current communication that is intercepted, and calculates the current NAV of each current communication;

[0061] In the wireless local area network, there may be more than one communication currently in progress, and the listening station can monitor the transmission frames or confirmation frames of multiple communications in a time-division manner. The listening station analyzes and judges the type of the intercepted frame, the source address and the destination address, and uses the address information of the communication sender as the basis for distinguishi...

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Abstract

This invention relates to wireless local network signal channel occupancy end time update and its status testing method, which comprises the following steps: a, in side station detecting signal channel transmission frame to analyze its content to determine current communication label and to compute current NAV; b, side station point records the label from step a and current NAV information or to update communication stored current NAV; c, selecting maximum one update station NAV from all communication to fulfill update of the signal channel occupancy end time.

Description

technical field [0001] The invention relates to a wireless local area network, in particular to a detection method for a channel state in the wireless local area network. Background technique [0002] Wireless local area networks are usually based on the carrier sense multiple access protocol CSMA, and its improvement methods include: channel split reservation multiple access SRMA (split-channel reservation multiple access), collision avoidance multiple access protocol MACA (multiple access with collision avoidance ), the improved collision avoidance multiple access protocol MACAW, the bottom acquisition multiple access protocol FAMA (flooracquisition multiple access) and 802.11 carrier sense / collision avoidance agreements such as CSMA / CA, the wireless local area network that the present invention refers is based on CSMA / CA agreement. [0003] The basic principle of the CSMA / CA protocol is shown in Figure 1. When the communication between the sending and receiving communica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28H04L12/413H04L29/06
Inventor 李峰王彬李杰
Owner ZTE CORP
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