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Mobile Information Systems
Volume 2016 (2016), Article ID 4306356, 9 pages
http://dx.doi.org/10.1155/2016/4306356
Research Article

Hybrid Multicast Transmission for Public Safety Network in 5G

1Network Technology & Planning Department, China Telecom Corporation Limited Beijing Research Institute, Beijing, China
2Department of Telecommunication Engineering, Beijing Electronic Science and Technology Institute, Beijing, China
3School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing, China

Received 28 April 2016; Revised 4 August 2016; Accepted 17 November 2016

Academic Editor: Chenwei Wang

Copyright © 2016 Fei Qi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We investigate the application of wireless multicast technology in public safety network (PSN) in future wireless communication system. The hybrid unicast/multicast transmission system is proposed and analyzed in 3D massive multi-input multioutput (MIMO) channel. The mutual coupling channel model is adopted under the different antenna array configuration scenarios. The proposed hybrid system adopts multicast beamforming in the multicast groups as well as multiuser-MIMO (MU-MIMO) linear precoding in the unicast group to increase system throughput. The null space method based interference cancellation is further performed between each group to eliminate signal leakage generated from each group. Comparisons between two types of antenna array configurations, different channel models, linear precoding as well as multicast beamforming, and user grouping strategies for multicast services are presented and analyzed by simulation.