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Interference elimination method based on clustering interference alignment under Femtocell network

A technology of interference alignment and interference cancellation, applied in network planning, space transmit diversity, diversity/multi-antenna systems, etc., can solve the problems of system capacity attenuation, high implementation complexity, and inapplicability to communication systems, achieving low complexity, Improve the system and capacity, and use the effect of spectrum resources

Active Publication Date: 2014-11-26
JIANGSU UNIV OF SCI & TECH
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Problems solved by technology

Although this method alleviates the cross-layer interference problem to a certain extent and improves the system capacity, the spectrum resources are not fully utilized, and the implementation complexity of the system is very high, which is not applicable to the actual communication system; Basak Guler et al. in 2013 Published a paper "Selective Interference Alignment for MIMO Femtocell Networks" on IEEE International Conference on in 2010. This paper mainly selects those macro users that can cause strong interference to femtocell base stations, and then uses interference alignment technology to eliminate interference. Although the proposed method can reduce the complexity of system implementation to a certain extent, it does not properly cluster femtocell users. When using interference alignment technology, there may be results that do not meet the feasibility conditions of interference alignment, resulting in system failure. capacity decay
It can be seen that none of the existing methods is the optimal cross-layer interference elimination method

Method used

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  • Interference elimination method based on clustering interference alignment under Femtocell network
  • Interference elimination method based on clustering interference alignment under Femtocell network
  • Interference elimination method based on clustering interference alignment under Femtocell network

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Such as figure 1 Shown is a system model diagram of the present invention, the wireless communication network in the figure includes a macro base station 101 and L (L≥2) macro users 102 and K (K≥2) femtocell base stations 103 and K femtocells User 104. A femtocell base station 103 serves a femtocell user 104, and a femtocell base station user pair 105 is formed by a femtocell base station 103 and a femtocell user 104, and all macro users 102 and femtocell users 104 have M t (Generally: 2≤Mt ≤6) transmit antennas, the macro base station 101 and each femtocell base station 103 have N o (Generally: N f ≤N o ) and N f (Generally: 2≤N f ≤6) receiving antennas, clustering is for all femtocell base station user pairs 105 .

[0030] The present invention solves the problem of cross-layer interference by clustering interference alignment u...

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Abstract

The invention discloses an interference elimination method based on clustering interference alignment under a Femtocell network. A wireless communication network includes a macro base station, L macro users, K Femtocell base stations and K Femtocell users. One Femtocell base station and one Femtocell user form a Femtocell base station user pair. Each of the macro users and Femtocell users is provided with Mt transmitting antennae. The macro base station is provided with No receiving antennae. Each Femtocell base station is provided with Nf receiving antennae. Clustering is targeted at all Femtocell base station user pairs. The method includes the following steps: under the Femtocell network, firstly clustering the Femtocell base station users and then considering cross-layer interferences and at last using an interference alignment technology to eliminate interferences between the macro users and each cluster and thus effective comprise between complexity, link expenditure and system performance is realized. The method makes full use of frequency spectrum resources and realizes better system performance with lower complexity.

Description

technical field [0001] The invention relates to an interference elimination method under a cross-layer network, in particular to an interference elimination method based on clustering interference alignment under a Femtocell network, and belongs to the technical field of wireless communication. Background technique [0002] In recent years, with the rapid development of communication technologies, studies have shown that approximately 70% of voice services and 90% of data services occur indoors. In order to achieve a higher data rate, the concept of femtocell (Femtocell) has gradually emerged and is well known in the industry. Femtocell as a formal term began to appear in 2006, and has gradually developed into a solution to improve mobile communication indoor coverage and increase system capacity. The original idea was to connect the home multimedia terminal with the existing Internet and mobile cellular network through a plug and play (plug and play) indoor access point, us...

Claims

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Application Information

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IPC IPC(8): H04W16/14H04B7/06
Inventor 解志斌杜中涛鹿存东何庆松
Owner JIANGSU UNIV OF SCI & TECH
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