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Adaptive-frequency-spectrum-reuse-based femtocell interference reduction method

An adaptive and spectral technology, applied in electrical components, wireless communication, etc., can solve problems such as high signaling overhead, slow convergence speed, and algorithm failure to converge to the global optimum

Inactive Publication Date: 2016-05-04
XIDIAN UNIV
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Problems solved by technology

However, the channel and power joint coordination algorithm cannot converge to the global optimum point, and often can only converge to a local optimum point
At the same time, this method not only has a large signaling overhead but also has a slow convergence speed.

Method used

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Embodiment Construction

[0050] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0051] The main channel self-configuration algorithm will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0052] Such as figure 1 As shown, the specific implementation steps of the main channel self-configuration algorithm in the embodiment of the present invention are as follows:

[0053] (1) Build a neighbor table Each FAP exchanges its neighbor set information with its neighbors to calculate the maximum number of cliques and node degrees in the local interference graph, and build the following neighbor table, where i, N i , c i , d i They are the number of FAPi, ...

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Abstract

The invention discloses an adaptive-frequency-spectrum-reuse-based femtocell interference reduction method. According to the adaptive frequency spectrum reuse, all channels are divided into main channels and secondary channels; and high transmitting powers are distributed to the main channels and only low transmitting powers are distributed to the secondary channels. Each FAP (femtocell access point) configures the main channel according to a local interference graph and a main channel selected by an adjacent FAP; and the main channels of the adjacent femtocells are orthogonal mutually. The adaptive performance indicates that each FAP needs to decide the maximum number of main channels that can be configured to the FAP according to the local interference graph, thereby improving the frequency spectrum utilization rate. According to the invention, because the soft frequency reuse concept of the macro cell network can be extended to the femtocell network, the interference between the femtocell networks can be effectively reduced and the frequency spectrum efficiency of the cell edge user can be improved. Compared with the existing femtocell interference reduction method, the provided adaptive-frequency-spectrum-reuse-based femtocell interference reduction method has advantages of high frequency spectrum utilization rate, low signaling cost, and high convergence rate.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to the interference management of a femtocell network, in particular to a distributed channel coordination algorithm. Background technique [0002] In the past ten years, information and communication technology and its application systems have developed rapidly, showing unprecedented prosperity. The development and maturity of mobile communication, wireless communication, multimedia information service and the Internet provide great convenience for people to carry out any kind of information interaction in different time and space fields. The wide application of Internet technology and people's increasing dependence and demand on data transmission services have impacted and promoted the continuous upgrading of mobile communication technology. With the rapid growth of wireless users' demand for mobile services, how to provide users with ubiquitous high-speed data access se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04
CPCH04W72/044H04W72/0473
Inventor 李建东黄国刚刘伟盛敏张琰李红艳
Owner XIDIAN UNIV
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