scholarly journals Utility-Energy Efficiency Oriented User Association With Power Control in Heterogeneous Networks

2018 ◽  
Vol 7 (4) ◽  
pp. 526-529 ◽  
Author(s):  
Xietian Huang ◽  
Wei Xu ◽  
Hong Shen ◽  
Hua Zhang ◽  
Xiaohu You
Keyword(s):  
Energy Efficiency ◽  
Power Control ◽  
Heterogeneous Networks ◽  
User Association

scholarly journals User Association and Power Control for Energy Efficiency Maximization in M2M-Enabled Uplink Heterogeneous Networks with NOMA

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5307 ◽  
Author(s):  
Shuang Zhang ◽  
Guixia Kang
Keyword(s):  
Energy Efficiency ◽  
Power Control ◽  
Heterogeneous Networks ◽  
Base Station ◽  
Sequential Optimization ◽  
User Association ◽  
Decode And Forward ◽  
Vast Number ◽  
Machine Type ◽  
Machine Type Communication

To support a vast number of devices with less energy consumption, we propose a new user association and power control scheme for machine to machine enabled heterogeneous networks with non-orthogonal multiple access (NOMA), where a mobile user (MU) acting as a machine-type communication gateway can decode and forward both the information of machine-type communication devices and its own data to the base station (BS) directly. MU association and power control are jointly considered in the formulated as optimization problem for energy efficiency (EE) maximization under the constraints of minimum data rate requirements of MUs. A many-to-one MU association matching algorithm is firstly proposed based on the theory of matching game. By taking swap matching operations among MUs, BSs, and sub-channels, the original problem can be solved by dealing with the EE maximization for each sub-channel. Then, two power control algorithms are proposed, where the tools of sequential optimization, fractional programming, and exhaustive search have been employed. Simulation results are provided to demonstrate the optimality properties of our algorithms under different parameter settings.

scholarly journals An Optimal Joint User Association and Power Allocation Algorithm for Secrecy Information Transmission in Heterogeneous Networks

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Rong Chai ◽  
Mingxue Chen ◽  
Qianbin Chen ◽  
Yuanpeng Gao
Keyword(s):  
Energy Efficiency ◽  
Information Transmission ◽  
Power Allocation ◽  
Heterogeneous Networks ◽  
Optimization Problem ◽  
Transmission Rate ◽  
Rapid Development ◽  
Base Stations ◽  
User Association ◽  
Efficient Manner

In recent years, heterogeneous radio access technologies have experienced rapid development and gradually achieved effective coordination and integration, resulting in heterogeneous networks (HetNets). In this paper, we consider the downlink secure transmission of HetNets where the information transmission from base stations (BSs) to legitimate users is subject to the interception of eavesdroppers. In particular, we stress the problem of joint user association and power allocation of the BSs. To achieve data transmission in a secure and energy efficient manner, we introduce the concept of secrecy energy efficiency which is defined as the ratio of the secrecy transmission rate and power consumption of the BSs and formulate the problem of joint user association and power allocation as an optimization problem which maximizes the joint secrecy energy efficiency of all the BSs under the power constraint of the BSs and the minimum data rate constraint of user equipment (UE). By equivalently transforming the optimization problem into two subproblems, that is, power allocation subproblem and user association subproblem of the BSs, and applying iterative method and Kuhn-Munkres (K-M) algorithm to solve the two subproblems, respectively, the optimal user association and power allocation strategies can be obtained. Numerical results demonstrate that the proposed algorithm outperforms previously proposed algorithms.

scholarly journals Energy-Efficient Power Allocation and User Association in Heterogeneous Networks with Deep Reinforcement Learning

2021 ◽  
Vol 11 (9) ◽  
pp. 4135
Author(s):  
Chi-Kai Hsieh ◽  
Kun-Lin Chan ◽  
Feng-Tsun Chien
Keyword(s):  
Energy Efficiency ◽  
Reinforcement Learning ◽  
Power Allocation ◽  
Heterogeneous Networks ◽  
User Association ◽  
Joint Power ◽  
Continuous Space ◽  
Wireless Backhaul ◽  
Continuous Actions ◽  
Efficient Power

This paper studies the problem of joint power allocation and user association in wireless heterogeneous networks (HetNets) with a deep reinforcement learning (DRL)-based approach. This is a challenging problem since the action space is hybrid, consisting of continuous actions (power allocation) and discrete actions (device association). Instead of quantizing the continuous space (i.e., possible values of powers) into a set of discrete alternatives and applying traditional deep reinforcement approaches such as deep Q learning, we propose working on the hybrid space directly by using the novel parameterized deep Q-network (P-DQN) to update the learning policy and maximize the average cumulative reward. Furthermore, we incorporate the constraints of limited wireless backhaul capacity and the quality-of-service (QoS) of each user equipment (UE) into the learning process. Simulation results show that the proposed P-DQN outperforms the traditional approaches, such as the DQN and distance-based association, in terms of energy efficiency while satisfying the QoS and backhaul capacity constraints. The improvement in the energy efficiency of the proposed P-DQN on average may reach 77.6% and 140.6% over the traditional DQN and distance-based association approaches, respectively, in a HetNet with three SBS and five UEs.

A deep reinforcement learning for user association and power control in heterogeneous networks

2020 ◽  
Vol 102 ◽  
pp. 102069 ◽  
Author(s):  
Hui Ding ◽  
Feng Zhao ◽  
Jie Tian ◽  
Dongyang Li ◽  
Haixia Zhang
Keyword(s):  
Reinforcement Learning ◽  
Power Control ◽  
Heterogeneous Networks ◽  
User Association
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