Dwelling channel selection method for solving deaf problem of cognitive radio wireless network

Abstract

The invention discloses a dwelling channel selection method for solving the deaf problem of a cognitive radio wireless network and belongs to the technical field of cognitive radio wireless electric networks. The method mainly comprises that: according to a sensed spectrum hole and the intercepted dwelling channel selection information of neighboring nodes, each node selects an available channel, which is not collided with the dwelling channels of the neighboring nodes within a two-hop range by using a distributed method, as a dwelling channel for performing control information interaction and service channel negotiation with other nodes; and when the dwelling channels of the nodes within the two-hop range collide due to the appearance of a main user, the movement of a node or the like, a dwelling channel selection process is restarted to select a new dwelling channel. The method can effectively improve the route reconstruction condition caused by communication interruption and deaf problem resulting from the dynamic change of the availability of frequency spectra in the cognitive radio wireless networks. The method is suitable to be used in the cognitive radio wireless networks, distributed multi-hop networks, wireless local networks, next-generation heterogeneous network and other places.

Description

A Camping Channel Selection Method to Solve the Deafness Problem in Cognitive Wireless Networks Technical field: wireless network channel resource allocation, multi-channel access The present invention belongs to the field of cognitive wireless network technology, such as cognitive radio network, distributed multi-hop network, wireless local area network, wireless access, etc., and in particular relates to the multi-channel access technology of cognitive radio network. Background technique: The distributed cognitive radio network is composed of peer-to-peer nodes with sensing functions. Each node can perceive idle channel resources and use idle channel resources for communication without interfering with authorized users, so as to improve the efficiency of channel resources. utilization rate. The solution to the deafness problem in cognitive radio networks based on conflict-free resident channel selection is to select an available channel for each node as its resident chan...

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Problems solved by technology

Most of the literature directly assume that the network has a common control channel, but no further research has been done on the selection of the control channel. Typical literature such as (Huisheng Ma, Lili Zheng, Xiao Ma, Yongjian Luo. Spectrum Aware Routing for Multi-Hop Cognitive Radio Networks with a Single Transceiver, Proceedings of Third International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CrownCom2008, Singapore, 15-17 May, 2008) and (J.So and N.H.Vaidya.A Routing Protocol for Utilizing Multiple Channels in Multi-Hop Wireless Networks , in Tech. Rep., University of Illinois at Urbana-Champaign, October 2004)

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