Channel access control method oriented to multichannel wireless distributed network

Abstract

The invention aims at the problem of invalid transmission caused by the phenomenon of 'disappearance' of target nodes in a multi-channel MAC protocol based on a synchronous channel switching mechanism, and provides a novel channel access control mechanism which is suitable for the protocol and faces to a multi-channel wireless distributed network. The channel access control mechanism divides a time slot, namely the fundamental unit used for channel switching of nodes, into equilong micro time slots, and micro time slot boundaries of various nodes in the network are required to be aligned; thelength of the micro time slots is the longest time required for the transmission process of a complete message for once. Nodes which have no message transceiving demand in the current micro time slotcan quickly enter into the resting state so as to save the energy through utilization of a reserved busy signal mechanism in the micro time slots; simultaneously, nodes which want to send messages can timely perceive the phenomenon of 'disappearance' of the target nodes through utilization of a channel leaving busy signal mechanism in the micro time slots and combination of an alternate monitoring mechanism of the nodes during the random backspace process, thereby invalid transmission of the target nodes is given up and unnecessary bandwidth waste and energy waste are avoided.

Description

technical field [0001] The invention relates to wireless network communication technology, and specifically describes a channel access control method for multi-channel wireless distributed networks. Background technique [0002] In recent years, wireless communication technology has developed rapidly, and wireless wireless communication technologies such as cellular mobile communication systems, wireless local area networks, and Bluetooth technology have emerged one after another. These technologies have greatly facilitated people's lives, and at the same time promoted the development of wireless communication technologies. As a technology that has developed rapidly in the field of communication in recent years, wireless distributed network has received more and more attention. The wireless distributed network adopts the idea of ​​distribution and self-organization to build the network, which makes the network more flexible and robust. [0003] With the development of com...

AI Technical Summary

Problems solved by technology

If there is a third node C that wants to send a message to A at this time, after it switches to the default operation channel of A, even if the carrier sense mechanism is enabled, it cannot detect the ongoing transmission between A and B on another channel. Therefore, C will send an invalid message to A on A's default operation channel. Obviously, it is impossible for A to receive the message sent by C.

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