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Improved weighted graph-based super dense heterogeneous network interference coordination method

A heterogeneous network, interference coordination technology, applied in the direction of network traffic/resource management, electrical components, wireless communication, etc., can solve the problems that cannot effectively solve the difference, difficulty, and failure to meet the system design requirements of the rate request, and solve the problems of the user The effect of dynamic rate change and low complexity

Active Publication Date: 2017-02-15
上海瀚芯实业发展合伙企业(有限合伙)
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  • Application Information

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Problems solved by technology

In the future 5G network, solving the dynamic ultra-dense network interference problem is a non-deterministic polynomial difficult (NP-hard) problem. With the increase of the number of cells, the ABS-based interference coordination scheme in LTE can no longer meet the system design requirements. need
At the same time, the interference coordination scheme based on ABS cannot effectively solve the problem of the difference in rate requests between users due to different service types.

Method used

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  • Improved weighted graph-based super dense heterogeneous network interference coordination method
  • Improved weighted graph-based super dense heterogeneous network interference coordination method
  • Improved weighted graph-based super dense heterogeneous network interference coordination method

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Embodiment 1

[0072] The present invention provides an improved weighted graph-based interference coordination method for ultra-dense heterogeneous networks. First, according to the location of the cell and the interference from adjacent cells, the cells in the entire network are divided into some non-interfering Cell clusters, the interference level between cell clusters is controlled within the preset interference threshold threshold range, and the interference problem in the entire network is transformed into the interference problem in independent cell clusters; then, in each cell cluster unit, According to the interference received by the cell users from other cells in the cluster, an interference weighted graph with the user as the vertex is established, and the user is directly used as the object of the analysis of the interference problem, and the users within the preset weight and interference threshold are divided. Finally, according to the interference relationship between users a...

Embodiment 2

[0075] Such as figure 1 As shown, an improved weighted graph-based interference coordination method for ultra-dense heterogeneous networks provided by the present invention includes the following specific steps:

[0076] Step 1): Collect network information and initialize parameters. Collect the number of macro stations M, the number of small stations S and the number of users N in the network, and record the macro stations as: M={M 1 , M 2 ,...,M M} Cell set is recorded as: S={S 1 ,S 2 ,...,S S}, the user set is recorded as: N={N 1 ,N 2 ,...,N N}, each cell is connected to a cell gateway, and the cell gateway is responsible for allocating the sub-channels used by each cell, and the sub-channels provided by the initialization cell gateway to the entire network are expressed as: L={L 1 , L 2 ,...,L L}, the subchannel can be reused by all cells, and the inter-cell interference threshold is set to Γ th .

[0077] Step 2): collecting user information. Cell users use ...

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Abstract

The invention discloses an improved weighted graph-based super dense heterogeneous network interference coordination method. With maximizing the network spectrum efficiency as a target and in a condition of ensuring a changed rate request along with changes of a service type for cell users, cells are firstly clustered according to cell interference environments in the actual super dense heterogeneous network scene; a user interference weighted graph is built in each cell cluster, users in the cluster adopt a low-complexity dynamic sub-channel multiplexing method, the method joins cell clustering and user clustering, and a weighted interference graph is built for the user. The purposes of increasing the network spectrum efficiency and reducing the interference are realized, the low complexity and good convergence performance are realized, the interference problem in the whole network is converted to the interference problem in each small cell cluster, the interference problem is simplified, interference in the network is suppressed on the basis of ensuring the user rate, and the maximization of the network spectrum efficiency is realized.

Description

technical field [0001] The invention belongs to the technical field of wireless resource management in mobile communication, and in particular relates to an improved interference coordination method in an ultra-dense heterogeneous network based on a weighted graph in a wireless communication system. Background technique [0002] An ultra-dense heterogeneous network in which low-power small cells are densely deployed at the same frequency within the coverage area of ​​macro cells is an effective method proposed by 3GPP (Third Generation Partnership Project) to improve the spectrum utilization and network capacity of 5G networks. However, the increase in the density of small cells will increase the inter-cell interference, which will limit the improvement of the entire network capacity, and at the same time, the call quality of users at the edge of the cell will be seriously affected. Considering that each cell base station and cell users in the actual network scenario in the ...

Claims

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Application Information

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IPC IPC(8): H04W28/02H04W28/04
CPCH04W28/0236H04W28/04
Inventor 潘志文涂晶刘楠尤肖虎
Owner 上海瀚芯实业发展合伙企业(有限合伙)
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