Joint Resource Allocation for Multicasting in HetNets

2nd International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Xie, Changxia^1 ; Ma, Dong^1 ; Gao, Yun^1 ; Sheng, Jie^1 ; Zhu, Canyan^1

School of Rail Transportation, Soochow University, Suzhou, China^1

关键词: Equivalent constraints;    Heterogeneous network (HetNets);    Iterative algorithm;    Joint resource allocations;    Optimization problems;    Resource allocation schemes;    Subchannel assignment;    Suboptimal solution;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/490/6/062006/pdf
DOI  :  10.1088/1757-899X/490/6/062006

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Both heterogeneous networks (HetNets) and multicasting are key technologies for 5G wireless systems. In this paper, we investigate the joint resource allocation scheme for multicasting in HetNets. The objective is to maximize the system throughput achieved by multicast users subject to the transmit power budgets of BSs. We mathematically formulate the resource allocation scheme to an optimization problem with nonsmooth objective. We first transfer the nonsmooth objective function to an equivalent constraint, and then decompose the problem to subchannel assignment as well as power allocation subproblems to reduce the complexity. Algorithms with lower complexity are developed to find suboptimal solutions of these subproblems. Simulation results verify that our resource allocation scheme achieves higher multicast throughput than existing schemes and the iterative algorithms converge rapidly.