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Cross-layer interference coordination optimization method in ultra-dense heterogeneous networks

A heterogeneous network, cross-layer interference technology, applied in the direction of network traffic/resource management, electrical components, wireless communication, etc., can solve the problems of narrowing the distance between small stations, unsuitable for ultra-dense scenarios, interference, etc., to improve the overall Throughput performance, effect of guaranteed system edge performance

Active Publication Date: 2017-02-15
白盒子(上海)微电子科技有限公司
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AI Technical Summary

Problems solved by technology

In a dense network, the traditional macro-micro cross-layer interference is no longer the only major source of interference. Due to the narrowing of the distance between small cells, small cell users in a dense area will not only receive interference from nearby macro cells, but the surrounding small cells will also interfere with it
Traditional interference coordination methods are not suitable for ultra-dense scenarios

Method used

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  • Cross-layer interference coordination optimization method in ultra-dense heterogeneous networks
  • Cross-layer interference coordination optimization method in ultra-dense heterogeneous networks
  • Cross-layer interference coordination optimization method in ultra-dense heterogeneous networks

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Embodiment Construction

[0036] The following LTE-A system is taken as an example to further illustrate the present invention.

[0037] like figure 1 Shown is a cross-layer interference coordination optimization method under ultra-dense heterogeneous networks, including the following parts.

[0038] The first step is the expansion strategy of the small cell range

[0039] The small cell needs to count its own historical resource occupancy to determine the ability of the small cell to accept services after the expansion of the range, that is, to determine the service capability of the macro cell formed after the expansion of the small cell. The historical average resource block (Resource Block, RB) occupancy / idle rate can be calculated by measuring the historical resource usage of the small cell. A gradual CRE configuration strategy is adopted to approach the upper limit of user load of the small cell:

[0040] 11) Initially, a lower CRE offset will be uniformly set between all macro station / small s...

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Abstract

The invention discloses a cross-layer interference coordination optimization method in a super dense heterogeneous network. The method includes a cell range extension strategy, a micro station ABS allocation strategy and a small station ABS allocation strategy. According to the method, on the basis of the interference characteristics of scenes, cell range extension offset between macro cells and micro cells is reasonably planned for load balance, the same-layer manner and the cross-layer manner are combined to allocate nearly blank subframes for macro stations and micro stations so as to reduce interference between neighbor cells, and thus the total throughput capacity of a system can be maximized on the premise that the system edge user reliability is guaranteed.

Description

technical field [0001] The invention relates to a cross-layer interference coordination and optimization method applied in an ultra-dense heterogeneous network scene, and belongs to the field of network technology in mobile communication. Background technique [0002] In the heterogeneous network of the long-term evolution and its subsequent evolution (LTE-A, Long Term Evolution-Advanced) system, in the future, we will focus on the capacity demand characteristics of a certain area (such as hotspot gathering areas), so deploy high-density small cells become a common strategy. Due to the small coverage area of ​​the small cell, the frequency can be effectively multiplexed among the small cells located in the second layer topology of the network, thereby improving the spectrum efficiency in the system unit area. The ultra-dense micro-cell network has the characteristics of low deployment cost, high energy efficiency, and good signal quality, but at the same time, the problem o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/08H04W24/02
Inventor 潘志文缪俊刘楠尤肖虎
Owner 白盒子(上海)微电子科技有限公司
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