Joint Optimization Method for Energy Efficiency and Load Balancing in Wireless Heterogeneous Networks

Abstract

The joint optimization method of the wireless heterogeneous network based on QoS energy efficiency and load balancing of the present invention, firstly, in the wireless heterogeneous network composed of the macro base station and the micro base station, the user randomly selects one of the base stations that can receive the pilot signal As a serving base station, OFDMA is used to randomly assign subcarriers to one or more users for modeling analysis, and a dual objective function of energy efficiency and load balancing is constructed under the constraints of spectrum bandwidth and transmit power constraints; then, the proposed The multi-objective particle swarm algorithm based on K-means clustering and fan-shaped window not only improves energy efficiency, but also ensures the relative load balance of the entire wireless communication network. The invention has low complexity and is easy to implement, can effectively solve the joint optimization problem of QoS-based energy efficiency and load balance in wireless heterogeneous networks, and ensures that the energy efficiency of the entire communication network is continuously improved under the condition of relatively balanced load.

Description

technical field [0001] The invention belongs to the field of wireless communication network simulation, and relates to joint optimization of energy efficiency and load balancing in wireless communication networks, in particular to a joint optimization method of energy efficiency and load balancing of wireless heterogeneous networks. Background technique [0002] In recent years, with the explosive growth of mobile data volume, computers, network equipment, small cells, etc. produced by existing macro base stations and different manufacturers, running on different protocols, support different functions or applications The wireless heterogeneous network (Heterogeneous Network) of the industry is receiving general attention in the industry. Since the wireless heterogeneous network can select the appropriate network topology for users according to the characteristics of users (such as vehicle users), business characteristics (such as high real-time requirements) and the characte...

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Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the present invention provides a QoS-based joint optimization method for energy efficiency and load balancing in wireless heterogeneous networks, which solves the problem that traditional methods only focus on energy efficiency or load balancing in wireless heterogeneous networks A single goal is used to find the optimal solution, which leads to the problem that a single performance index in wireless communication is better, while other performance indexes are poor

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