Semi-Distributed User Relaying Algorithm for Amplify-and-Forward Wireless Relay Networks

In this paper, designing an effective user relaying algorithm, in terms of relay node selection and power allocation, is discussed for amplify-and-forward wireless relay networks. The objective is to simplify the application of user relaying in practical wireless communication networks so that the system capacity can be improved with low computational complexity and system overhead. Beginning with the derivation of a tight thresholdbased sufficient condition on the feasibility of a relay node, i.e., ensuring that user relaying via the node can achieve a larger channel capacity than direct transmission, a semi-distributed user relaying algorithm is proposed. In the proposed algorithm, each relay node can make decision on its feasibility individually, and the ultimate decision on the relay node selection among multiple feasible ones is made in a centralized manner. Since there is no need on exchanging channel state information among different network nodes, the proposed algorithm is simp...

• Type: Journal
• Year: 2008
• Where: TWC
• Authors: Jun Cai, Xuemin Shen, Jon W. Mark, Attahiru Sule Alfa
• Keywords: Algorithm, Node, Relay, TWC 2008