Interference reduction method based on overlapping clustering in udn

A reduction and clustering technology, applied in the field of communication, can solve problems such as use and irregular distribution of small base stations

Active Publication Date: 2021-12-31
HENAN POLYTECHNIC UNIV
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  • Description
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  • Application Information

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Problems solved by technology

This document assumes that each cell is a regular hexagon, and the distribution of small base stations is regular. However, in the actual system, the distribution of small base stations is random and irregular, and it is impossible for all small base stations to have regular coverage. hexagon, so the method proposed in this document cannot be used in practical systems

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  • Interference reduction method based on overlapping clustering in udn
  • Interference reduction method based on overlapping clustering in udn
  • Interference reduction method based on overlapping clustering in udn

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Embodiment Construction

[0038] An embodiment of the present invention is given below to further describe the present invention in detail. Consider an ultra-dense network consisting of several small cells and multiple users, both of which are randomly distributed within the network. Each base station is connected to the central controller through a backhaul link.

[0039] The central controller first constructs the path loss diagram corresponding to the small base stations in the network, such as figure 1 As shown, the nodes in the figure correspond to the small base stations, and the edges correspond to the path loss between the small base stations. If the path loss between the small base stations is less than the preset loss threshold, there is a condition between the nodes corresponding to the two small base stations. and the length of the edge is equal to the path loss between the two small base stations. If the path loss between the small base stations is greater than a preset loss threshold, th...

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Abstract

The invention discloses an interference reduction method based on overlapping clustering, which is suitable for ultra-dense networks adopting multi-point coordinated transmission. Construct a path loss graph based on the path loss between small base stations, and find the shortest side in turn in the path loss graph. If there is a triangle or quadrilateral with this side as one of the sides, multiple vertices of one of the triangles or quadrilaterals The corresponding small base stations are placed in a cluster, otherwise the two vertices corresponding to the small base stations are placed in a cluster, and for each user, the average value of the path loss between the user and the small base stations in the cluster is calculated, and according to the average The values ​​group users into clusters, and finally use graph coloring on the path loss graph to assign sub-frequency bands to each cluster, and the small base stations in each cluster use the allocated sub-frequency bands to interact with users in this cluster.

Description

technical field [0001] The invention relates to the communication field, in particular to an interference reduction method based on overlapping clustering in an ultra-dense network. Background technique [0002] Ultra Dense Network (UDN, Ultra Dense Network) is one of the key technologies of the next generation mobile communication. Deploying a large number of low-power small base stations in UDN can increase system capacity, enhance indoor coverage, and improve spectrum utilization. Since the distance between small base stations is very close, if they use the same frequency band, there will be serious interference, so effective interference reduction methods are a hot research topic. [0003] Existing interference mitigation methods in the UDN are divided into clustering, resource allocation, Coordinated Multiple Point transmission (CoMP, Coordinated Multiple Point) and the like. [0004] By clustering, the entire network is divided into several small networks, and each s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/10H04W40/02H04L5/00H04W16/14H04W72/04H04W72/08
CPCH04L5/0035H04W16/10H04W16/14H04W40/02H04W72/0453H04W72/54
Inventor 田心记王小旗陈慧
Owner HENAN POLYTECHNIC UNIV
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