Adaptive Hierarchical Multiple Access Method and System in High Dynamic Wireless Network

Abstract

The invention discloses an adaptive hierarchical multiple access method and system for a high-dynamic wireless network. The method comprises the following steps of carrying out statistics on sending and receiving conditions of node services by a center control node (CCN); carrying out comparison with threshold values of different service quantity conditions, and judging service quantity levels; carrying out statistics on own service quantities of nodes under the condition of small service quantities, actively reporting the service quantities to the CCN, and taking an average value of the service quantities of all the nodes by the CCN, or carrying out statistics from the perspective of the CCN; and carrying out regular statistics on the service quantities of the nodes in the network by theCCN under the condition of medium and high service quantities, and when new statistical service quantities are changed to reach new service quantity levels, modifying access modes of the nodes according to the new service quantity levels. The method has the advantages that the purposes, that the collision probability is reduced, the access efficiency is improved, the channel throughput is high, the access delay is small, the packet loss rate is low, an asynchronous working mode can be realized, the channel use is fair, the requirement of transceiver equipment is simple and the application range is wide, are achieved.

Description

technical field [0001] The invention relates to the technical field of multiple access, in particular to an adaptive hierarchical multiple access method and system in a high dynamic wireless network. Background technique [0002] The multiple access (ie, medium access control, MAC) method solves the problem of how multiple nodes or users share channel resources quickly, super-efficiently, fairly and reliably. According to the way of channel allocation, it is usually divided into three ways: fixed allocation, random access and on-demand allocation. [0003] The fixed allocation access method is to allocate channel resources to some nodes or all nodes that share the channel for a long time, and the level of each node is the same. Fixed allocation is the simplest access method. Its advantage is that it can guarantee the reliability, real-time and continuity of communication. The disadvantage is that for non-real-time or discontinuous services, the fixed access method may It w...

AI Technical Summary

Problems solved by technology

Fixed allocation is the simplest access method. Its advantage is that it can guarantee the reliability, real-time and continuity of communication. The disadvantage is that for non-real-time or discontinuous services, the fixed access method may It will cause a long time to monitor the channel, which is easy to cause a waste of resources

The disadvantage is that collisions cannot be completely avoided, because there is a transmission delay in the process of sending data, so collision detection and avoidance are required, and some additional overhead is required

Using a single access method when nodes access the network may cause a waste of resources or some nodes cannot be accessed normally

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