Heterogeneous Small Cell Spatial Division Interference Coordination Method Based on Dynamic Beam Closing

Abstract

The invention discloses a heterogeneous small cell space division interference collaborative method based on dynamically-closed beams. The implementation method comprises the steps that the two-layer precoding scheme is adopted on a macro base station, and the first layer is DFT precoding based on channel relevant information and used for weakening interference of the macro base station on user groups of a small cell; the second layer is multi-user MIMO precoding based on equivalent channel design after the first layer of precoding of the macro base station and used for eliminating interference between users of the macro base station. The multi-user precoding of a small cell base station can be designed according to the specific conditions of the small cell. According to the scheme, compared with a traditional scheme, cross-layer interference between a macro cell and the small cell can be restrained efficiently, meanwhile, return stroke cost is lowered, and the method is especially suitable for configuring a large-scale antenna array to the macro base station.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a space-division interference coordination method for heterogeneous small cells based on dynamic closing of beams. Background technique [0002] With the popularization and application of smart terminals and the continuous growth of new mobile business demands, the demand for wireless transmission rate will increase exponentially in the next 10 years. 1000 times that of the camp system. Existing 4G technology will still be unable to meet the ultra-high transmission rate mobile Internet wireless communication needs ten years later. In the case of increasingly scarce spectrum resources, it is necessary to introduce transformative new technologies. While promoting the industrialization of 4G, countries around the world have begun to focus on the research of the fifth-generation wireless mobile communication technology (5G), striving to make a new leap in the ...

AI Technical Summary

Problems solved by technology

Since the deployment of small cells in the future mobile communication network will be self-organizing, it is difficult to establish a high-speed and stable backhaul link between the micro base station and the macro base station in many scenarios, which brings challenges to the application of collaborative MIMO

However, it is noticed that the new generation of mobile communication is likely to adopt massive MIMO technology, that is, an antenna array much larger than 4G scale will be deployed at least on the macro base station side, so the channel characteristics will change significantly

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