Interference alignment method in heterogeneous cellular network

A cellular network and interference alignment technology, applied in the directions of space transmit diversity, modulation carrier system, transmission system, etc., can solve the problems of few channel resources, not considering the performance impact of non-ideal CSI system, low resource utilization, etc., to improve performance Effect

Inactive Publication Date: 2015-04-29
WUXI BUPT SENSING TECH & IND ACADEMY +1
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Problems solved by technology

[0007] The purpose of this application is to solve the problem that each user can occupy less channel resources and the resource utilization rate is low in the technology of coordinating and processing inter-cell interference in heterogene...

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  • Interference alignment method in heterogeneous cellular network
  • Interference alignment method in heterogeneous cellular network
  • Interference alignment method in heterogeneous cellular network

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Embodiment Construction

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0024] The application scenario corresponding to the present invention is the OSG access mode of the downlink multiple input multiple output (MIMO) heterogeneous cellular network. In a macro cell, L small cells (miniature base stations) (small cell 1,..., L), each small cell base station (PBS1, ) serves a small cell user (PUEl, ), the macro base station (MBS M) serves K macrocell users (MUEL+1,...,L+K) at the same time, such as figure 1 shown. ...

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Abstract

The invention provides an interference alignment method in a heterogeneous cellular network. With the adoption of the interference alignment method in the heterogeneous cellular network provided by the invention, same frequency interference can be effectively inhibited in terms of interference overlapping, and accordingly, the performance of a user is improved. The interference alignment method overcomes the defect that in a conventional technique for coordinately processing inter-cell interference with a resource orthogonal division method, each user occupies a few channel resources; in order to solve the problem that influence of non-ideal CSI (customer satisfaction index) on the performance of a system is not taken into consideration in a conventional heterogeneous cellular network interference alignment technique, the interference alignment method performs interference alignment design in a limiting feedback system, takes influence of non-ideal CSI on the performance of the system into consideration, performs bit allocation at the aim of minimization of average speed loss and performs channel quantization under the principle of minimization of chordal distance.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to an interference alignment method in a heterogeneous cellular network. Background technique [0002] In order to meet the rapidly increasing data rate requirements and higher coverage quality requirements of today's wireless communications, 3GPP (The 3rd Generation Partnership Project, 3rd Generation Partnership Project) developed a technology based on Long Term Evolution-Advanced (LTE-A) Heterogeneous Networks (HetNets) technology is proposed in the standardization of . A heterogeneous network is defined as a network composed of different access technologies, different network architectures, different transmission schemes, or access points with different coverage. According to the above definition, the future cellular network has the characteristics of a heterogeneous network, mainly in the form of a macro base station (Macro BS) and a miniaturized b...

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Application Information

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IPC IPC(8): H04B7/06H04B7/04
CPCH04B7/0413H04B7/0613H04L25/03821H04L27/2647
Inventor 张天魁牛勤胡志蕊葛安盟
Owner WUXI BUPT SENSING TECH & IND ACADEMY
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