Method for achieving dynamic frequency reuse under cloud wireless access network architecture

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

Active Publication Date: 2014-03-26
UNIV OF SCI & TECH OF CHINA
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to propose a dynamic frequency reuse method under the cloud wireless access network architecture, to solve the partial frequency reuse under the existing cellular wireless communic

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  • Method for achieving dynamic frequency reuse under cloud wireless access network architecture
  • Method for achieving dynamic frequency reuse under cloud wireless access network architecture
  • Method for achieving dynamic frequency reuse under cloud wireless access network architecture

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Embodiment 1

[0038] The following embodiments of the present invention provide a specific implementation process of a dynamic frequency multiplexing method under a cloud radio access network architecture for a certain traffic scenario.

[0039] figure 1 It is a schematic diagram of the system structure under the cloud wireless access network architecture. The system includes a base station resource pool 107, a high-speed switching structure 109, and 6 remote radio heads. The 6 remote radio heads are respectively the first remote radio head 110 and the second remote radio head. The second remote radio head 111, the third remote radio head 112, the fourth remote radio head 113, the fifth remote radio head 114 and the sixth remote radio head 115, the cells they respectively cover are the first cell 101, the second cell 102, the third cell 103, the fourth cell 104, the fifth cell 105 and the sixth cell 106; the base station resource pool 107 is composed of a central management scheduling modul...

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Abstract

The invention discloses a method for achieving dynamic frequency reuse under cloud wireless access network architecture. The method is characterized by being suitable for a full-frequency-band orthogonal frequency division multiplexing system. The cloud wireless access network architecture comprises a far-end radio-frequency head, a base station resource pool and a high-speed switching fabric. The base station resource pool comprises a base-band processing unit and a central management and scheduling module. The central management and scheduling module is used for distributing frequency resources to users in the central zone and marginal zone of each cell covered by a system respectively according to the service load of different zones of the cell, wherein when the frequency resources are distributed to the users in the marginal zone of each cell, a method based on graph coloring is adopted so as to guarantee that same frequency interference between the marginal zones of two adjacent cells can not occur and the utilization ratio of high-frequency-spectrum resources can be further improved. Compared with an existing cellular system, operation and maintenance cost can be effectively reduced, same frequency interference between the cells can be avoided, the utilization ratio of the high-frequency-spectrum resources can be improved, and the throughput of each cell can be improved.

Description

technical field [0001] The invention belongs to the technical field of frequency multiplexing methods in wireless communication systems, and in particular relates to a method for realizing dynamic frequency multiplexing under a cloud wireless access network architecture. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) technology has been more and more widely used in the field of modern wireless communication because of its higher spectrum utilization rate and faster data transmission rate. However, when two adjacent cells use the same spectrum resource, serious co-channel interference will occur between users in the two cells. At present, a more effective way to solve this problem is to use fractional frequency reuse (Fractional Frequency Reuse), which divides each cell into a central area and an edge area, and the spectrum resource on each baseband processing unit is also divided into two parts. , a part of which has a frequency reuse factor...

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Application Information

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IPC IPC(8): H04W16/10H04L29/08H04W72/04
Inventor 周武旸王楷为赵明
Owner UNIV OF SCI & TECH OF CHINA
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