Spectrum switching method based on reputation system in cognitive heterogeneous wireless network

Abstract

The present invention relates to a spectrum switching method based on a reputation system in a cognitive heterogeneous wireless network. For the problem that selfish or malicious behaviors of secondary users in a spectrum switching process cause degradation of network performance, firstly, the behavior of a secondary user after accessing a channel is evaluated by extracting user behavior characteristic information, a reputation value is determined according to the behavior of the secondary user, and a reputation system is established on a cognitive base station; secondly, the secondary user isranked according to a reputation status of the secondary user, and a licensed channel or a channel of an ISM frequency band is allocated to the secondary user according to the ranking situation of the secondary user; and finally, in a process of accessing a licensed spectrum, when a requirement for a waiting delay of a user is met, the secondary user with a high reputation value has a higher access priority. A simulation result shows that the method can effectively improve system throughput, reduce probability of switching and interruption, reduce the chances to access the licensed spectrum by secondary users with low reputation, and improve system security.

Description

technical field [0001] The invention belongs to a spectrum switching method in a cognitive heterogeneous wireless network and belongs to the field of mobile communication. In particular, it relates to a spectrum switching method based on reputation system. Background technique [0002] In the current research on spectrum handover, secondary users are usually regarded as credible. But in the actual cognitive radio network, the secondary users in the network may have selfish behaviors or even malicious behaviors for their own interests. This security risk is particularly prominent in a cognitive heterogeneous wireless network where a shared wireless network and a cognitive network coexist. The selfish and malicious behaviors of secondary users will cause the spectrum utilization efficiency and network performance (throughput, etc.) to gradually decrease. However, the current research work rarely considers the possible selfish and malicious behaviors in spectrum switching. ...

AI Technical Summary

Problems solved by technology

[0006] A spectrum switching method based on a reputation system in a cognitive heterogeneous wireless network, which aims at the problem that secondary users have selfish or malicious behaviors during the spectrum switching process in a cognitive heterogeneous wireless network, resulting in network performance degradation. The following design Spectrum switching steps:

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