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

A space division interference and small cell technology, applied in radio transmission systems, electrical components, transmission systems, etc., can solve problems such as difficulty in establishing high-speed and stable backhaul links, channel characteristic changes, etc.

CN103873121BActive Publication Date: 2017-06-16SOUTHEAST UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-06-16

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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.
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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 ...

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Embodiment Construction

[0021] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

[0022] Consider a downlink system scenario consisting of one macro base station (MBS) and K small cell base stations (SAP), including M macro base station service users (MUE), M s a SAP service user (SUE), such as figure 1 shown. The number of MBS antennas is N t , the number of SAP antennas is N t_small , the number of user antennas is 1, and the case of a single subcarrier is considered for simplicity, and other scenarios can be similarly promoted.

[0023] Consider the spectrum reuse gener...