Media access control (MAC) layer channel dynamic distribution method for Ad Hoc network

Abstract

The invention discloses a wireless media access control (MAC) layer multi-channel dynamic distribution method which belongs to the field of an Ad Hoc network. In the multi-channel Ad Hoc network, node participating in communication form a cell with neighbor nodes, when the nodes in the cell select a communication channel, a current state of neighbor nodes of both parties in communication and a possible channel selection scheme of the nodes are considered. Due to the fact that the situation of channel occupation can reflect the possibilities that the nodes can joint the communication, namely the probabilities that the neighbor nodes start communication, profit which is made by the communication nodes in selection of each channel can be calculated through a backward induction method of the game theory, namely the probabilities of effectively avoiding conflicts, information is transmitted by selecting the channel with the largest profit till the states of the nodes in the cell achieve Nash equilibrium, at the moment, the network achieves the optimal communication state, the largest handling capacity and the smallest packet loss probabilities and delay are achieved. The MAC layer channel dynamic distribution method for the Ad Hoc network can be used as an MAC layer protocol for an Ad Hoc network node device to select the channel.

Description

technical field [0001] The invention belongs to the field of Ad Hoc networks, and relates to a multi-channel dynamic allocation method of a wireless MAC layer. Background technique [0002] The Ad Hoc network is composed of a group of mobile nodes that can access the network at any time. The communication between nodes is completed by wireless network transmission and does not depend on the fixed communication network infrastructure. It has the characteristics of no center, self-organization, and dynamic changes in network topology. It has broad application prospects in personal area network, home networking, search and rescue operations, business education applications, and sensor networks. However, the flexibility of the Ad Hoc network and the characteristics of not relying on infrastructure lead to more network data packet collisions, resulting in low network throughput, large packet loss rate and long delay. These defects can be improved by improving the network MAC laye...

AI Technical Summary

Problems solved by technology

[0005] The above protocols do not consider the channel allocation strategies that neighbor nodes will adopt, so it is easy to cause conflicts

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