Dynamic frequency multiplexing method in cloud wireless access heterogeneous network architecture

A wireless access and dynamic frequency technology, applied in wireless communication, network planning, electrical components, etc., can solve problems such as low spectrum utilization and inability to adapt to changes in user traffic

Active Publication Date: 2014-09-03
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose a dynamic frequency multiplexing method in a cloud wireless access heterogeneous network, so as to solve frequency multiplexing under the existing heterogeneous n

Method used

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  • Dynamic frequency multiplexing method in cloud wireless access heterogeneous network architecture
  • Dynamic frequency multiplexing method in cloud wireless access heterogeneous network architecture
  • Dynamic frequency multiplexing method in cloud wireless access heterogeneous network architecture

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Embodiment 1

[0033]For the frequency resource allocation method based on graph coloring described in the present invention, a similar method has been proposed in some existing literatures, such as published in IEEE COMMUNICATION LETTERS, September 2013 No. In the article "Graph-Based Dynamic Channel Assignment Scheme for Femtocell Network" in Volume 17, No. 5, pages 1718 to 1721), a graph coloring-based application is proposed. Frequency resource allocation method in femtocell network, but this method can only be applied to single-layer femtocell network rather than multi-layer heterogeneous network. The frequency resource allocation method based on graph coloring in the dynamic frequency reuse method under the cloud wireless access network architecture proposed by the present invention can be applied to a heterogeneous network including a multi-layer network structure. Therefore, the allocation of frequency resources is more efficient and reasonable. In this embodiment, for a certain tra...

Embodiment 2

[0043] In this embodiment, for a certain traffic scenario, a detailed example of the specific implementation process of the frequency resource allocation adjustment method based on graph coloring in the dynamic frequency reuse method under the cloud wireless access network architecture is provided as follows:

[0044] The scenario set in this embodiment is: based on the traffic scenario proposed in Embodiment 1, the spectrum resource requirement of the cell covered by the first remote radio head 113 is reduced from 6a MHz to 4a MHz, and the rest The demand for spectrum resources in each cell covered by the remote radio head remains unchanged. In this case, the proposed frequency resource allocation adjustment method based on graph coloring needs to be used to adjust the original spectrum resource allocation result.

[0045] First, according to the spectrum resource allocation result in Embodiment 1, the used color vector of the first macro node 113 is [1, 0, 0, 0, 0, 0, 0, 0, ...

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Abstract

The invention discloses a dynamic frequency multiplexing method in cloud wireless access heterogeneous network architecture. The cloud wireless access heterogeneous network comprises a macro far end radio frequency head, a micro far end radio frequency head, a base station resource pool and a high-speed switching structure, and is characterized in that the heterogeneous network and the cloud wireless access network structure are combined, a graph coloring-based frequency resource allocation method and a graph coloring-based frequency resource allocation adjustment method are adopted, two cells in the adjacent same layers or different layers in the heterogeneous network can be ensured not to use the same frequency band to avoid same-frequency interference, and allocation of spectrum resources is dynamically realized and adjusted so as to meet constantly-changing user number inside the cell according to the spectrum resource requirement amount changing along with the time in each cell. The dynamic frequency multiplexing method in cloud wireless access heterogeneous network architecture can be applied to a full-frequency band orthogonal frequency division multiplexing system, the utilization rate of the spectrum resources can be effectively improved, and the throughput of each cell is added.

Description

technical field [0001] The invention belongs to the technical field of frequency reuse methods in wireless communication systems, and in particular relates to a method for realizing dynamic frequency reuse under a cloud wireless access heterogeneous network architecture. Background technique [0002] Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing) technology is more and more widely used in the field of modern wireless communication because it can achieve higher spectrum utilization and faster data transmission rate. At the same time, the proposal of the heterogeneous network, a network architecture concept that includes macro cells, micro cells or more cells at different levels, also provides an effective solution for solving the coverage problem in user hotspot areas and improving the performance of the entire network. In a heterogeneous network based on the orthogonal frequency division multiplexing technology, users located in diffe...

Claims

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Application Information

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IPC IPC(8): H04W16/10
Inventor 赵明王楷为周武旸
Owner UNIV OF SCI & TECH OF CHINA
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