Date Added: Jul 2009
Cooperation schemes are the key elements of infrastructure-less wireless networks that allow nodes that cannot directly communicate to exchange information through the help of intermediate nodes that relay their messages towards destination. The most widely adopted approach is based on hop-by-hop forwarding at network layer along a path to destination. Cooperative relaying brings cooperation al physical layer in order to fully exploit wireless resources. The concept exploits channel diversity by using multiple radio units to transmit the same message. The underlying fundamentals of cooperative relaying have been quite well-studied from a transmission efficiency point of view, in particular with a single source and destination.