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Channel selection access method applied to multi-channel wireless network

A technology of wireless network and channel selection, which is applied in wireless communication, using return channel for error prevention/detection, connection management, etc. It can solve problems such as node loss and node failure in normal communication, achieve low complexity and improve channel utilization , a wide range of effects

Inactive Publication Date: 2009-12-09
SOUTHEAST UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Technical problem: The present invention aims at the problem that hidden terminals and nodes caused by multi-channels in multi-channel networks can not communicate normally, and proposes a channel selection access method for multi-channel wireless networks. Nodes When selecting a channel, by querying the table, you can know the optional channels available for data transfer, and negotiate between the source node and the destination node to determine the channel and transfer data

Method used

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  • Channel selection access method applied to multi-channel wireless network
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  • Channel selection access method applied to multi-channel wireless network

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Embodiment Construction

[0026] In this method, a network node selects a certain channel as a certain control channel, and other channels are data channels, which can be selected when transmitting data, and nodes in an idle state in the network work on the control channel. Building a link involves the following three steps:

[0027] 1. The source node sends a request information frame for transmitting data, and the request includes the MAC addresses of the source node and the destination node, as well as channel information of the source node, etc.

[0028] 2. After receiving the request information frame, the destination node checks its own channel state table, compares it with the available channels provided in the source node request information frame, selects the channel for communication, and sends the determined channel information through the response The information frame is sent back to the source node.

[0029] 3. The source node sends an option to send information frame to inform its adjac...

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Abstract

Responding to the problems such as terminal concealment / terminal exposure, node loss and the like triggered by multi-channels in channel access of multi-channel wireless network, the invention proposes a channel selection access method applied to multi-channel wireless network. The handshake procedure of the method comprises 3 steps: a source node transmits a request information frame; a destination node responds to a response information frame; the source node once again transmits a selective transmission information frame. The 3 frames all contain channel information, wherein, the request information frame comprises optional channel information for the current data transmission, the response message frame and the selective transmission information frame both comprise data transfer channel information selected by the destination node. The nodes obtain conditions of the channels by inquiring the channel condition form which comprises the channel number, the channel condition and the conformation mark.

Description

technical field [0001] The invention relates to a channel selection and access method applied to communication between multi-channel wireless network nodes, and belongs to the technical field of wireless communication and information dissemination. Background technique [0002] Under the condition that the nodes have existing hardware resources, the multi-channel wireless network can make full use of multiple orthogonal physical channels, which can significantly improve the network throughput and reduce the transmission delay. [0003] Taking the IEEE 802.11b standard as an example, it has a total of 14 physical channels to choose from in the 2.4GHz frequency band, including multiple groups of mutually orthogonal (frequency bands do not overlap) channels, such as the three channels numbered 1, 6 and 11 channel. In traditional network design, according to the frequency resource division scheme, orthogonal channels are generally allocated to different adjacent subnets, and a ...

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Application Information

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IPC IPC(8): H04W74/08H04W76/02H04L1/18H04L1/16
Inventor 余旭涛张在琛
Owner SOUTHEAST UNIV
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