Back-off algorithm based on multi-priority access protocol

Abstract

The invention discloses a backoff algorithm based on a multi-priority access protocol, belongs to the field of wireless network communication, and solves the problems of overhigh time delay of high-priority services, overhigh backoff time delay of low-priority services and insufficient utilization of channel resources in the prior art. The algorithm provided by the invention comprises the following steps: setting a first parameter according to a priority level of an application layer data packet, a service proportion of each priority and a channel load; establishing a backoff time function model according to the first parameter; acquiring parameters of the backoff time function model according to a principle of lowest system packet loss rate; and determining the backoff time according to the backoff time function model. The method is suitable for the backoff algorithm design based on the multi-priority level access protocol.

Description

technical field [0001] The present application relates to the field of wireless network communication, in particular to a backoff algorithm based on a multi-priority access protocol. Background technique [0002] As a modern wireless network system, the self-organizing network does not depend on the preset infrastructure, and has the characteristics of fast networking, good scalability, and strong self-healing, so it has received extensive attention and research from many researchers. Its Media Access Control (MAC) protocol determines how many nodes share wireless channel resources fairly and effectively. The node's ability to acquire the channel mainly depends on the backoff time set by the MAC protocol. Packet collisions occur whenever more than one node attempts to access the medium at the same time. If the collided node tries to access the channel again, the packets will collide again. The backoff algorithm generates a backoff time through a backoff criterion, which i...

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