JOINT OPTIMIZATION OF RELAY POSITION AND POWER ALLOCATION IN COOPERATIVE BROADCAST WIRELESS NETWORKS

In this paper, we examine the resource optimization problem in a broadcast relay network where a source broadcasts signals to the user receivers, which are distributed over a service region. The source does not have direct line-of-sight to the service area and the infor-mation is delivered through a relay. The objective of this paper is to jointly optimize the relay position as well as the power allocation be-tween the source and relay so that the outage probability of the signal received at the user nodes is minimized. Two different optimization criteria, which respectively minimize the worst-case outage proba-bility and the average outage probability, are used. The analyses are verified by simulation results. Index Terms — Cooperative communications, broadcast net-work, joint optimization, resource allocation, outage probabilit