Perception-based frequency spectrum self-management method in femtocell network

Abstract

The invention relates to wireless resource management in mobile communication and provides a perception-based frequency sub-band self-management method in a femtocell network. The method comprises the steps: measuring and reporting interferences, produced by adjacent base stations, to a user by the user; and calculating interference weight and generating a weighting interference pattern by a centralized control unit according to a measurement report, and clustering femto base stations according to user service quality requirements and the distribution density of the base stations in the network so as to form a virtual cell. The femto base stations with lower mutual interferences are divided into a same cluster, and nodes in the cluster multiplex frequency sub-band. Because the base stations in the femtocell network are started or closed at any time, the network topology and the base station density are made change at any time, the self-management of frequency spectra is realized by re-executing a clustering algorithm and regulating a clustering parameter through respectively adopting a frequency sub-band distribution algorithm based on a maximal multiplexing entropy specific to the dynamical time-varying property of the network according to the quantity of the base stations subjected to starting and closing and the density of activated base stations in the network, and thus, the frequency spectrum utilization rate of the network is improved effectively while the interferences among the femo base stations are inhibited.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular, the invention relates to a sensing-based spectrum self-management method in a femtocellular network, which can be used in the next generation mobile communication long-term evolution system (LTE / LTE-A). Background technique [0002] At present, the third generation mobile communication system (3G) has been widely used in commercial use. However, its peak transfer rate cannot meet people's increasing data rate requirements. In order to solve this problem, 3GPP launched the LTE new technology research and development project. The air interface of the LTE system adopts OFDMA / SC-FDMA as the core multiple access technology, MIMO as the transmission technology, and is committed to providing high peak rates and improving the cell edge. Improve user performance, improve cell capacity, and reduce system delay. [0003] At the same time, with the continuous development of wire...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of spectrum utilization when the femtocell network topology dynamic changes are not well considered in the prior art, and proposes a spectrum self-management method based on perception, which can effectively solve the problems caused by femtocell shutdown or Open the spectrum allocation problem caused by network dynamic changes, reduce interference between femtocells, and improve spectrum utilization

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