Optimal Power Allocation Between Unicast and Multicast Messages in Wireless Relay-Multicasting Networks Using Superposition Coding

Author

Wui, Jung-Hwa ; Kim, Dongwoo

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Hanyang Univ., Ansan, South Korea

Volume

15

Issue

11

fYear

2011

fDate

11/1/2011 12:00:00 AM

Firstpage

1159

Lastpage

1161

Abstract

This letter deals with optimal power allocation between unicast and multicast messages in a wireless relay multicasting network using superposition coding. A so-called multicast-balancing solution is provided and proved to be optimal, which maximizes the sum of data rates received at multiple destinations. And its optimality is also verified by numerical investigation. The proposed solution is a generalized version of the unicast-balancing solution that is optimal for a wireless relay system with only a single destination.

Keywords

multicast communication; network coding; radio networks; relays; multicast message; numerical investigation; optimal power allocation; so-called multicast balancing solution; superposition coding; unicast message; unicast-balancing solution; wireless relay-multicasting network; Encoding; Numerical models; Relays; Resource management; Signal to noise ratio; Unicast; Wireless communication; Optimal power allocation; a multicast-balancing solution; superposition coding; wireless relay-multicasting networks;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2011.092011.110070

Filename

6029946