Multi-channel selection multi-address access method

An access method and channel selection technology, which are applied in the field of multi-channel selective multiple access, can solve problems such as exposed terminals, and achieve the effects of reducing collision interval, making full use of, and reducing packet transmission delay.

Inactive Publication Date: 2008-01-09
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to provide a multi-channel selective multiple access method, which can ensure the conflict-free transmission of service packets to the greatest extent through a flexible service channel selection scheme, and at the same time solve the problem of exposed terminals caused by RTS / CTS packet handshake

Method used

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  • Multi-channel selection multi-address access method
  • Multi-channel selection multi-address access method
  • Multi-channel selection multi-address access method

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Embodiment Construction

[0090] FIG. 1 is a flow chart of the multi-channel selective multiple access method of the present invention. In the technical solution of the present invention, the multi-channel is divided into two parts, wherein a part is used as a common channel to transmit control packets (comprising RTS packets, CTS packets and ACK packets), and the other part is used as a traffic channel to transmit service packets. part of the channel includes the first common channel CCH 1 and the second common channel CCH 2 , the first common channel CCH 1 Used for communication nodes to transmit RTS / CTS packets to achieve handshake, the second common channel CCH 2 It is used for the receiving node to reply the ACK packet after successfully receiving the service packet, and the rest is the traffic channel TCH i , used to transmit business packets.

[0091] As shown in Figure 1, when there is a business packet to be sent, the following steps are performed:

[0092] Step 1. According to the stored...

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Abstract

In the invention, when a service packet needs to be transmitted, the follow steps will be executed: according to the saved and maintained channel usage list, the sending node selects a collision-free service channel; the RTS / CTS packet transmitted on first public channel between the sending node and receiving node realizes the handshake; the sending node transmits the service packet on said selected service channel; after successfully receiving the service packet, the receiving node replays the ACK packet on the second public channel.

Description

technical field [0001] The invention relates to a multiple access method, in particular to a multi-channel selective multiple access method suitable for Ad Hoc networks. Background technique [0002] Ad Hoc Network (Ad-Hoc Network) is a network form that does not need a fixed network as a support. Due to the advantages of fast and flexible networking, strong invulnerability, and low cost, the Ad Hoc network is especially suitable for military, emergency rescue, and electronic classrooms. This network has become an effective form of communication network in the field of wireless communication. Moreover, it has been widely used, such as 802.11 system and the integrated digital communication system of the U.S. Army, sea, land and air. A key design issue of Ad Hoc networks is multiple access. The multiple access (ie, Medium Access Control, MAC for short) method solves the problem of how multiple nodes or users share channel resources quickly, efficiently, fairly and reliably....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/22
Inventor 刘凯张军邢小琴
Owner BEIHANG UNIV
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