Opportunity frequency spectrum access method of wireless cognitive network

Abstract

The invention provides an opportunity frequency spectrum access method of a wireless cognitive network. The opportunity frequency spectrum access method of the wireless cognitive network comprises the steps that (1) a predetermined period of time M is continuously accessed to each information channel on the wireless cognitive network in sequence; (2) the information channel to which a secondary user needs to be accessed is calculated according to the history of an access information channel; (3) the behavior of the secondary user is determined according to the result in the second step and the history; (4) all statistical values in a system are updated and the steps are repeated from the second step. The opportunity frequency spectrum access method of the wireless cognitive network has the advantages that on one hand, the secondary user is prevented from being accessed to a non-optimum information channel for an excessive period of time; and one the other hand, the frequency of switching of information channels is reduced, and loss caused by frequent switching of the information channels is greatly reduced for the secondary user.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a cognitive wireless network opportunistic spectrum access method. Background technique [0002] On the one hand, with the widespread use of radio, spectrum occupation makes spectrum resources more and more precious. On the other hand, with the continuous development of radio technology, more flexible access methods are provided for mobile users. In cognitive wireless networks, it is generally divided into frequency band owners (such as various telecom operators), primary users (PU) and secondary users (SU). Primary users are authorized users who can access the channel at any time without any interference. Secondary users are unauthorized users who do not have access and service quality guarantees, but have greater flexibility to choose different operators to access. Therefore, based on cognitive radio technology, each telecom operator provides unoccupied freque...

AI Technical Summary

Problems solved by technology

Secondary users are unauthorized users and do not have access and service quality guarantees, but have greater flexibility to choose different operators to access

[0005] However, the above technology does not consider the loss of user revenue caused by the overhead of switching between different arms.

Specifically, in cognitive wireless networks, when secondary users switch access channels, there will be additional energy consumption and time delay, resulting in reduced user benefits

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