Cache admission control method in wireless multi-hop mesh network

Abstract

The invention discloses a cache admission control method in a wireless multi-hop mesh network, which mainly solves the unfairness problem that a multi-hop remote service in the wireless multi-hop network is discarded as a transfer node cache queue is full. The method comprises the following steps: a transfer node initializes cache allocation and admits packets; the transfer node periodically adjusts the allocation of cache portions; whether the total used cache of the transfer node reaches a threshold is judged; if not, the admission control is performed according to the cache portions of source nodes, the used cache number of the source nodes, the rest cache number of the transfer nodes and the number of the source nodes; if yes, packet admission is performed according to a cache admission function; and if a packet of a new source node arrives at the transfer node, the allocation of cache portions is updated. Through the invention, the 'starve' problem of the multi-hop remote servicein the multi-hop network is effectively solved in the term of cache management of the transfer node, the quality of the multi-hop remote service is improved, and the method can be used for guaranteeing the forwarding of the multi-hop remote service by the transfer node.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a wireless multi-hop mesh network. Specifically, it proposes a buffer admission control method based on multiple factors such as hop count, service category, and average packet arrival rate, which can be used to ensure that a transit node is Skip forwarding of remote services. Background technique [0002] Wireless Mesh Network WMN is a wireless network that uses multi-hop communication. It has self-organization, self-configuration, and self-healing capabilities, which can greatly increase the coverage of the wireless system, reduce network deployment costs, and increase the capacity of the wireless system. and communication reliability. Because of this, the wireless mesh network has attracted more and more attention, and has gradually become an important part of the next generation wireless communication. According to the function division of the nodes in the wire...

AI Technical Summary

Problems solved by technology

Since WMN is a wireless multi-hop network, most of the existing link layer queue management mechanisms do not consider the number of hops passed by data packet transmission, which will lead to serious unfairness and "starvation" of multi-hop remote services

In the existing medium access control MAC protocol based on carrier sense multiple access / collision avoidance CSMA / CA, the contention of wireless channels leads to the decline of the arrival rate of multi-hop remote services, which aggravates the "hunger" of multi-hop remote services ” phenomenon and the deterioration of multi-hop remote service performance

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