Cognitive technology-based indoor wireless communication coverage interference elimination scheme and cognitive technology-based indoor wireless communication coverage interference elimination device

Abstract

The invention discloses a cognitive technology-based indoor wireless communication coverage interference elimination scheme and a cognitive technology-based indoor wireless communication coverage interference elimination device. In order to enhance the indoor coverage effect of a mobile communication network, femtocells gain great attention because of low power consumption, short transmission distance and other characteristics. Aimed at the situation of poor indoor coverage effect, the invention discloses the method which applies the cognitive radio technology into femtocell interference elimination. By periodical spectrum sensing, femtocells learn and know spectrum utilization information in the surrounding radio magnetic environment, and dynamically access idle subchannels to carry out communication, consequently, interference applied on macrocell base stations / users is prevented, and the high throughput and high reliability of a system are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a novel indoor coverage interference cancellation method and device suitable for wireless communication networks. Background technique [0002] Cellular communication systems have achieved great success worldwide, as evidenced by the huge number of users they have. The cellular system was originally used to provide high-quality voice services, ensuring that users can communicate anytime and anywhere. The global promotion of 3G (Third Generation Mobile Communication System) has made users increasingly contact and use data services. With the development of LTE / LTE-A (Long Term Evolution), users' demand for high-speed data services is increasing, which puts forward higher requirements for mobile communication network system capacity, coverage, and transmission quality. [0003] Recent statistical reports show that about 70% of wireless data services occu...

AI Technical Summary

Problems solved by technology

[0007] (1) When a macro cell user enters the coverage area of ​​a home base station, if the macro cell base station is still providing services without authorization from the home base station, it will be interfered by the downlink signal of the home base station. At the same time, the uplink signal of the macro user It will also interfere with the communication of the home base station;

[0008] (2) When the home base station is placed in an area close to the macro base station, strong interference will occur between the base stations, affecting their respective communications

In particular, the transmission power of the macro base station is relatively high, and the home base station will be seriously affected, so that it cannot provide services for its users;

[0009] (3) When the deployment of home base stations is too dense, the home base stations will conflict due to competition for limited resources, forming a self-interference system

However, these algorithms have high computational complexity, and most of them involve optimization theory, game theory, iterative process, etc., which put forward high requirements on the processing speed of hardware in practical application scenarios

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