Wireless ad hoc network carrier detection channel access method based on time/power two-dimensional backoff

Abstract

The invention discloses a wireless ad hoc network carrier detection channel access method based on time / power two-dimensional backoff. According to the success situation of current data frame transmission of a node, the size of a backoff window and the value of a transmission power of the node are adjusted jointly based on a time / power two-dimensional backoff algorithm; if the node fails to send adata frame, the probability of participating in a competition channel by the node at the time dimension is reduced by increasing a backoff window; and the interference signal strength of the node atthe spatial dimension is reduced by reducing the transmission power. Meanwhile, a relationship among a network saturation throughput, a transmission power and a competition window is analyzed by constructing a three-dimensional Markov chain model and values of an optimal transmission power and a completion window level are determined under certain network scale conditions. The simulation result shows that performances in terms of the network throughput, data packet delay and average energy consumption reduction can be improved by using the method disclosed by the invention.

Description

technical field [0001] The invention belongs to the field of wireless networks, in particular to a wireless ad hoc network carrier detection channel access method based on time / power two-dimensional backoff. Background technique [0002] The wireless self-organizing network does not depend on the fixed infrastructure, and the networking is fast and flexible. When some nodes fail or are destroyed and stop working, the operation of the entire network will not be affected, so the network has strong anti-destruction and self-healing ability. In recent years, the wireless self-organizing networking method has been widely used in various network forms such as the Internet of Things, wireless mesh network, Internet of Vehicles, drone swarm network, etc., and has attracted widespread attention. The distributed power control mechanism is the key to improving the space division multiplexing degree of wireless ad hoc networks and reducing the average energy consumption of nodes, which...

AI Technical Summary

Problems solved by technology

Although this type of power control MAC protocol can achieve the purpose of saving network energy through periodic node sleep, it cannot solve the problem of conflict interference in the network, which limits the improvement of network throughput performance.

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