Energy-efficiency-based cell selection method for multilevel heterogeneous network

A cell selection, heterogeneous network technology, applied in the direction of network traffic/resource management, energy consumption reduction, advanced technology, etc., can solve the problems of incomplete utilization of low-power base stations, different downlink transmit power, and unbalanced load.

Active Publication Date: 2015-05-20
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

In a multi-layer stereo heterogeneous network, the downlink transmission power of base stations in each cell is different, and the cell selection method based on the maximum signal-to-noise ratio will lead to overload of high-power base stations, while incomplete utilization of low-power base stations will cause serious load imbalance problems

Method used

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  • Energy-efficiency-based cell selection method for multilevel heterogeneous network
  • Energy-efficiency-based cell selection method for multilevel heterogeneous network
  • Energy-efficiency-based cell selection method for multilevel heterogeneous network

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Embodiment Construction

[0038] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0039] figure 1 It is a schematic diagram of a multi-layer heterogeneous cellular network in an embodiment of the present invention. The multi-layer heterogeneous network with full-frequency multiplexing includes a macrocell base station and several small cell base stations, which together form a base station set β={BS 1 , BS 2 , BS 3 ,...,BS N}, each base station has a unique serial number N={1, 2, 3, ..., N}. All base stations work in Open Access Mode, a certain number of users are randomly distributed in the area, and all users have the right to access any base station BS n . Each user can only occupy one transmission resource of one base station for transmission.

[0040] figure 2 The general flow chart of this method, it can be seen from the figure that this method mainly includes five steps, and the specific process of each st...

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Abstract

The invention relates to an energy-efficiency-based cell selection method for a multilevel heterogeneous network, and belongs to the technical field of wireless communication. The method comprises the following steps that 1, users calculate own alternative base station lists and selection degree of freedom information, and report the information to all base stations in the alternative base station lists; 2, all the base stations share own basic information and the information reported by the users; 3, the base stations select the user of which the selection degree of freedom is minimum every time, and determine a cell selected by the user according to a designed new criterion; 4, the base stations update the original alternative base station list and selection degree of freedom information; 5, steps 3 and 4 are cyclically executed until each user selects the corresponding access cell. According to the method, differences of different base stations are ignored, and the SINR (Signal to Interface and Noise Ratio) required by each user, loads of the base stations and the utilization efficiency of the users for the energy of the base stations of the cells are comprehensively taken into account, so that the quality of service for the users is ensured, the phenomena of load non-uniformity and user starvation are avoided, and the energy utilization efficiency of the users is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to the technical field of multi-layer heterogeneous wireless cellular networks, and relates to a cell selection method based on energy efficiency in a multi-layer heterogeneous network. Background technique [0002] With the advent of the mobile Internet era, the growth of data traffic has exploded, and users have put forward higher requirements for network experience, and a multi-layer heterogeneous network (HetNet) has emerged as the times require. Compared with the traditional single-layer network, the heterogeneous network contains different types of access nodes, including macro cell base stations and various small cell base stations. In the face of different nodes, it is more reasonable for users to choose which base station to access to obtain services. Become one of the challenges faced by multi-layer heterogeneous networks, because the traditional cell select...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/20
CPCH04W28/0247H04W28/08H04W48/20Y02D30/70
Inventor 陈前斌李茹洁刘青海李昕韵唐伦
Owner CHONGQING UNIV OF POSTS & TELECOMM
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