Approaches to nodes choosing protocol model for collaborative MIMO cellular networks

This paper discusses collaborative MIMO techniques among nearby base stations, relay stations and user equipments. It is vital to optimize performance and choose collaborative nodes due to unnecessary collision and cost while unlimited abusing of neighbors. After proving the usage possibility of helping node under certain situation, a node choosing protocol model on UE-UE collaborative scenario was proposed by exchanging energy information. The detailed protocol elements such as messages, management mechanism, and node selecting algorithm are described in literally.