Interference suppression method of hybrid network of macrocell and Femtocell

Abstract

The invention discloses an interference suppression method of a hybrid network of macrocell and Femtocell. The method comprises the following steps: the Femtocell in a certain range is clustered; the transmission power of the femto base station in the cluster; the clustering situation of the Femtocell is adjusted; the Femtocell in an interference sensitive area is clustered; for the Femtocell of the clustered interference sensitive area, the transmission power of the femto base station in the cluster is controlled by using the cluster as unit; the clustering situation of the Femtocell in the interference sensitive area is adjusted, the Femtocell cluster in the interference sensitive area is determined; the micro user equipment is divided into a dead zone user equipment and a non-dead zoneuser equipment; spectrum resources are divided into three nonoverlapping parts; and the spectrum resources are distributed for the Femtocell in the interference sensitive area, the dead zone user equipment, the Femtocell in the non-interference sensitive area and the non-dead zone user equipment. By adopting the method of the invention, the spectrum utilization efficiency and system capacity of the overlapped double-layer network of the macrocell and the Femtocell, and the problems of the cross-layer interference between the macrocell and the Femtocell and the same-layer interference of the Femtocell can be effectively solved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication networks, in particular to an interference suppression method in a hybrid networking of a macro cell and a femto cell. Background technique [0002] The emergence of many high-data-rate wireless communication standards indicates that wireless communication has entered an era of rapid increase in reliability and capacity. Cooper's law well explains the capacity growth of wireless communication: "In the past 104 years, the capacity of wireless communication has increased every 30 doubled every month." For example, since the popularization and application of the civil wireless communication system in the United States in 1957, the wireless communication capacity has increased by nearly 1 million times. A 5-fold increase has come, and a better modulation method has brought a 5-fold increase, and a 1600-fold increase has been brought about by reducing the area of ​​the cell and ...

AI Technical Summary

Problems solved by technology

Therefore, if there is no effective interference suppression and resource allocation algorithm, the network architecture of Femtocell and macro cell hybrid network will eventually reduce the system capacity

[0006] In addition, compared with the structure of the traditional Hierarchical Cell System (HCS), the network architecture of Femtocell and macro cell hybrid networking has the following characteristics: (1) The location of micro cells in traditional HCS is determined through pre-planning, while In the network architecture of Femtocell and macro cell hybrid network, femto base stations are arranged according to user needs, and users only need to meet the coverage of micro areas, so their distribution is random; (2) Femtocell coverage radius (10-50m) is smaller , which is 2 to 3 orders of magnitude different from the usual macro cell radius (300-2000m); (3) With the increase in the number of Femtocells in the macro cell, since Femtocells use xDSL as the data return method, the huge network load brings The time delay will make it impossible to directly coordinate and control between the Femtocell and the macro cell

Therefore, the interference suppression and radio resource management methods in traditional HCS are not fully applicable to the network architecture of Femtocell and macro cell hybrid networking

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