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Energy efficiency optimization method of heterogeneous network enhanced inter-cell interference coordination

An inter-cell interference, heterogeneous network technology, applied in network planning, energy reduction, advanced technology, etc., can solve problems that have not been given yet

Active Publication Date: 2017-08-18
NORTHWEST UNIV(CN)
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Problems solved by technology

Therefore, it is necessary to study how to set the configuration parameters of EE-eICIC (energy efficiency optimization enhanced inter-cell interference coordination), and optimize the energy allocation of joint user access and ABS distribution. These specifications have not yet been given in the eICIC standard

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  • Energy efficiency optimization method of heterogeneous network enhanced inter-cell interference coordination
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Embodiment Construction

[0099] The present invention is further described below in conjunction with accompanying drawing:

[0100] Consider a two-layer heterogeneous cellular network system of TDD-LTE, where the subframe and ABS of eICIC can be dynamically configured. UE refers to user equipment (eg, mobile equipment), and an evolved base station (eNodeB) performs radio resource management, admission control, and other scheduling coordination functions of the base station.

[0101] User model: For user downlink transmissions, the UE determines the best set of candidate base stations for macro and micro cells based on the received signal strength measured over the entire bandwidth. It is assumed that the base station adopts the maximum transmission power, and the user determines which base station to access according to the received signal strength of all base stations including macrocells and microcells in the entire bandwidth. Therefore, the present invention optimizes the energy efficiency of eICI...

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Abstract

The present invention relates to an energy efficiency optimization method of heterogeneous network enhanced inter-cell interference coordination. A 3GPP proposes the enhanced inter-cell interference coordination (eICIC), and aims to keep the interference of the silence reduction to a low-power base station, such as a micro cell, a pico cell, etc. in the almost blank subframes (ABS) via a macro cell, and the energy-efficient (EE) is very crucial for the intensive deployment of the low-power nodes. According to the present invention, an energy efficiency optimization enhanced inter-cell interference coordination (EE-eICIC) algorithm solves the energy efficiency distribution of the ABS and the energy efficiency access of the user equipment, and a modeling optimization problem is a non-smoothing and mixed integer problem, so that a sub-optimal algorithm is provided. The sub-optimal algorithm adopts the generalized fractal planning theory and the convex optimization theory, and solves by the iterative and relaxation rounding algorithms. The simulation results show that the EE-eICIC algorithm has the better performances both at the energy efficiency aspects of the systems and the users. The energy efficiency optimization method of the heterogeneous network enhanced inter-cell interference coordination of the present invention can be used for the realization of an actual heterogeneous cellular network based on the eICIC energy efficiency load distribution.

Description

technical field [0001] The invention belongs to the technical field of wireless communication networks, and mainly relates to the energy efficiency optimization problem based on enhanced inter-cell interference coordination (eICIC) in a heterogeneous cellular network, and specifically relates to almost blank subframe (ABS) allocation of eICIC, user access and user time A method for realizing joint allocation of domain resources. Background technique [0002] To meet the rapidly growing demand for wireless data, 4G Long Term Evolution Advanced (LTE-A) specifies the deployment of low-power nodes (such as femtocells or microcells) under existing high-power macrocellular networks. Due to the large difference in transmit power between base stations (BS) in the downlink of Heterogeneous Cellular Networks (HetNets), especially macrocells have larger coverage areas than microcells. The capacity of a dense heterogeneous cellular network (HetNet) can be improved by assigning users to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J11/00H04W16/10H04W72/08H04W72/54
CPCH04J11/0056H04W16/10H04W72/541Y02D30/70
Inventor 郑杰高岭王海杨旭东张晓任杰高全力
Owner NORTHWEST UNIV(CN)
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