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An energy efficiency optimization method for enhanced inter-cell interference coordination in heterogeneous networks

A technology for inter-cell interference and heterogeneous networks, which is applied in network planning, energy consumption reduction, advanced technology, etc., and can solve problems that have not yet been given

Active Publication Date: 2019-07-12
NORTHWEST UNIV
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Problems solved by technology

Therefore, it is necessary to study how to set the configuration parameters of EE-eICIC (Energy EfficiencyOptimization Enhanced Inter-cell Interference Coordination), joint user access and energy optimization allocated by ABS. These specifications have not yet been given in the eICIC standard

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  • An energy efficiency optimization method for enhanced inter-cell interference coordination in heterogeneous networks
  • An energy efficiency optimization method for enhanced inter-cell interference coordination in heterogeneous networks
  • An energy efficiency optimization method for enhanced inter-cell interference coordination in heterogeneous networks

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Embodiment Construction

[0095] The present invention is further described below in conjunction with accompanying drawing:

[0096] 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.

[0097] 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

An energy efficiency optimization method for enhanced inter-cell interference coordination in heterogeneous networks, 3GPP proposed enhanced inter-cell interference coordination (eICIC), which aims to reduce the impact on low power by keeping silent in almost blank subframes (ABS) of macro cells Interference from base stations (such as microcells, picocells, etc.). Energy-Efficient (EE) is critical for dense deployment of low-power nodes. In the present invention, the EE-eICIC algorithm is used to solve the energy-efficient allocation of almost blank subframes (ABS) and the energy-efficient access of user equipment. Since the optimization problem of modeling is a non-smooth and mixed integer problem, a suboptimal algorithm is proposed. The suboptimal algorithm adopts generalized fractional programming theory and convex optimization theory, and solves it by iteration and relaxation rounding algorithm. The simulation results show that the EE‑eICIC algorithm has better performance in terms of both system and user energy efficiency. The invention can be used in the realization of load distribution based on eICIC energy efficiency in actual heterogeneous cellular networks.

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...

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Application Information

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Patent Type & Authority Patents(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
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