A Clustering-Based Disturbance Alignment Method in Two-Layer Networks

A technology for interference alignment and cross-layer interference, applied in baseband systems, components of baseband systems, preventing/detecting errors through diversity reception, etc., can solve non-interference elimination methods, inapplicable communication systems, clustering of femtocell base stations, etc. problem, to achieve the effect of reducing the complexity of interference management and implementation complexity

CN106788812BActive Publication Date: 2019-11-19JIANGSU UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-11-19

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Abstract

The invention discloses a cluster-based interference alignment method for a two-layer network. The method comprises the steps of: firstly, modeling the two-layer network based on stochastic geometry, then clustering femtocell base stations and users, and finally eliminating interference by using an interference alignment technology. A three-dimensional femtocell network structure model, particularly, a femtocell network model conforming to three-dimensional Poisson point process distribution, is close to the actual interference scene. Femtocell base stations and users are clustered according to the principle of square error function decrease, and cross-layer interference of macrocell users and each cluster and inter-cluster interference in a femtocell layer are finally eliminated by using the interference alignment technology, so that the complexity of interference management is reduced, and the method is applicable to actual communication systems.
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Description

technical field

[0001] The invention belongs to the technical field of wireless communication, and in particular relates to an interference alignment method based on clustering in a two-layer network. Background technique

[0002] In recent years, energy consumption and electromagnetic pollution are becoming more and more serious, which is not conducive to the construction of future communication infrastructure, and has become an urgent technical problem to be solved in the next generation communication system; on the other hand, the current indoor voice and data services are more With frequent transmission, people have higher and higher requirements for data service quality. How to effectively reduce communication network energy consumption and efficiently use spectrum resources is a technical problem that operators must solve in the next step. A femtocell is a small wireless access point deployed indoors. It is connected to the operator's network through a digital subscrib...

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Embodiment Construction

[0023] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings;

[0024] The wireless communication network includes a macro-cell base station 101, L (L≥1) evenly distributed macro-cell users 102 and K (K≥1) Poisson-distributed femtocells, and each femtocell contains a femtocell The base station 103 and a femtocell user 104 constitute a femtocell base station user pair 105; the macrocell base station 101 has M M transmit antennas, each femtocell base station 103 has M F transmit antennas, all macrocell users 102 and femtocell users 104 have N receiving antennas; all femtocell base station users are clustered 105, and users in each cluster share the same frequency band, and each frequency band contains N sc sub-channels and are orthogonal to each other, so intra-cluster interference is not considered. This paper focuses on the cross-layer interference and inter-cluster same-layer interference of the femtocell base s...