Interference suppression method based on fractional frequency reuse and joint transmission in heterogeneous network

A technology of frequency multiplexing and joint transmission, which is applied in the field of communication, can solve the problems of low frequency utilization and achieve the effects of improving throughput, performance, and high frequency reuse

Inactive Publication Date: 2014-05-14
XIDIAN UNIV
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Problems solved by technology

[0004] The coordinated multi-point transmission technology CoMP is also a method to suppress interference in heterogeneous networks. One of the technologies is joint transmission, that is, using multiple base stations to use the same frequency to provide services for a user at the same time, so that the interference signal is converted into Useful signal, although this technology can effectively suppress the same-channel interference received by users and improve user throughput, but the frequency utilization rate is very low

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  • Interference suppression method based on fractional frequency reuse and joint transmission in heterogeneous network
  • Interference suppression method based on fractional frequency reuse and joint transmission in heterogeneous network
  • Interference suppression method based on fractional frequency reuse and joint transmission in heterogeneous network

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] refer to figure 1 , the concrete realization of the present invention is as follows:

[0034] Step 1: Build a community model:

[0035] refer to figure 2 , the construction of this step is as follows:

[0036] Assuming that there are N cells in the cellular mobile communication network, N=7 is taken in this example. Among them, the first cell is in the center of the network, and the other six cells are distributed around the first cell as its adjacent cells, such as figure 2 as shown in a;

[0037] Suppose each cell is composed of three regular hexagonal sectors, such as figure 2 as shown in b;

[0038] Taking the first cell as an example, a high-power node, that is, a macro base station M1, is placed in the center of three regular hexagonal sectors. The macro base station M1 is composed of three 120° antennas, and each antenna covers a secto...

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Abstract

The invention discloses an interference suppression method based on fractional frequency reuse and joint transmission in a heterogeneous network. The interference suppression method mainly solves the problems that interference exists in a heterogeneous network and edge user throughput capacity is low in the heterogeneous network. The interference suppression method includes the steps that (1) cell models are established, namely, each cell is composed of three sectors, a macro base station is arranged at the center of each cell, and two micro base stations are arranged in each sector; (2) fractional frequency reuse is used for assigning frequency resources to each base station; (3) when a new user having access to the network is a micro base station user or a central macro base station user or a macro base station non-CoMP user, a service base station of the new user provides service for the new user independently; (4) when a user having access to the network is a macro base station cooperative user, a service base station of the new user and a cooperative base station of the new user perform joint transmission on the new user. The interference suppression method effectively suppresses interference in each cell and between the adjacent cells, improves the frequency utilization rate and the throughput capacity of cell edge users, and can be used for transmission in the heterogeneous network.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to an interference suppression method, which can be used for heterogeneous network transmission. Background technique [0002] With the continuous development of mobile communication technology, the unevenness of service distribution has become more and more obvious. Most of the communication traffic is concentrated in indoor and outdoor hotspots. The traditional homogeneous network can no longer meet people's needs. Therefore, Heterogeneous network technology has been widely used. However, due to the introduction of low-power nodes in the heterogeneous network, the interference in the heterogeneous network is not only the interference between the adjacent cell base stations, but also the interference between the macro base station and the micro base station in the same cell, and the interference in the network becomes more complicated. . Therefore, it is of great significance...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04W52/04H04W72/04
Inventor 付卫红李聪胡梅霞张凡路贾坤路贵朝陈杰虎黑永强李晓辉刘乃安
Owner XIDIAN UNIV
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