Implementation of Cognitive Wireless Network Routing Protocol Based on Channel Assignment

Abstract

The invention provides a method for implementing a cognitive radio network routing protocol based on channel allocation. A channel availability ratio and a channel switching delay are used as channel selection standards, a routing having the minimum end-to-end delay is selected to perform data transmission on the premise of ensuring the channel availability so as to shorten the end-to-end delay of the routing and improve the data delivery rate. Simulation results show that compared with the existing routing protocols, the proposed routing protocol can significantly improve the routing performance in terms of data packet delivery delay and data delivery rate. The method provided by the invention has the beneficial effects that the routing protocol mainly uses the channel availability ratio and the channel switching delay as the channel selection standards, the link delivery rate and the end-to-end delay are comprehensively considered, the routing having the minimum end-to-end delay is selected to serve as the optimal routing on the premise of ensuring the channel availability so as to reduce the channel switching times, shorten the routing delay, improving the data delivery rate and ensuring the data transmission reliability.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for implementing a cognitive wireless network routing protocol based on channel allocation. Background technique [0002] Wireless communication technology has developed rapidly since its birth in the 20th century, bringing great convenience to people's lives. At the same time, wireless network technology is also widely used in military, industrial, commercial and many other fields. As a carrier of data transmission, limited spectrum resources have been difficult to meet the current communication needs of human beings. In this context, in order to alleviate the increasingly tight spectrum resources, cognitive radio technology has received widespread attention and has been applied to cognitive wireless networks. The core idea is that cognitive users use unique detection devices to automatically detect Spectrum can be used for sensing, finding idle channels, and ac...

AI Technical Summary

Problems solved by technology

When a node forwards data as a relay node in different routing paths at the same time, if the channels selected by the two paths are different, the node must switch between different channels to ensure the normal communication of multiple paths. This leads to frequent channel switching delays

On the other hand, for multi-channel multi-hop routing in cognitive wireless networks, compared with single-hop routing, primary user activities seriously affect the end-to-end stability

Single-hop routing only needs to consider the local channel availability, while multi-hop routing must consider the stability of all links, because the failure of each link will affect the end-to-end stability

Assuming a path is S-a-b-D, assuming that the channel selected between a-b is unavailable due to the activities of authorized users, making the link invalid, no matter whether other links are connected or not, the entire link is still unavailable. If you want to complete data transmission, The route must be rebuilt, and the reestablishment of the route often causes additional delay and more energy waste

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