Title :
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
fDate :
11/1/2011 12:00:00 AM
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;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2011.092011.110070
