Reliable communication based femtocell user clustering method in cognition heterogenous network

Abstract

The invention discloses a reliable communication based femtocell user clustering method in a cognition heterogenous network. The clustering method comprises the following steps: at the initial moment of each time slot, acquiring position information of non-clustered femtocell base stations by perceiving available spectrum of the stations; under the management of an integrated controller, obtaining path loss information among all femtocell base stations with communication users to be regarded as interference among the femtocell users; randomly selecting one existing femtocell user cluster for the non-clustered femtocell users, calculating the interference subjected by each femtocell base station; if all the femtocell base stations in the cluster satisfy the interference limiting condition, enabling the femtocell users to join the cluster; if not, selecting other clusters, and judging whether the femtocell users satisfy the condition to join the other clusters or not. The clustering method improves stability and anti-interference performance of femtocell base station communication.

Description

technical field [0001] The present invention aims at research on interference management among home base station users in a cognitive heterogeneous network, belongs to the technical field of cognitive wireless network communication, and in particular relates to a large number of home base station users within the coverage area of ​​a macro base station, and these home base station users use Research on methods to effectively suppress mutual interference and ensure reliable communication of home base station users when spectrum resources are limited. Background technique [0002] In recent years, with the development of the mobile Internet and the emergence of a large number of smart terminals, wireless data services have exploded. At the same time, due to the increasingly powerful functions of mobile terminals, there must be higher requirements for the rate of real-time and non-real-time data services. It has been proven that more than 50% of total phone calls and 70% of da...

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Problems solved by technology

[0006] Through a large number of investigations and based on the above discussion, the existing interference research methods have not improved spectrum utilization while reducing co-channel interference and ensuring reliable communication for femtocell users in the case of scarce spectrum resources.

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