The International Journal of Innovative Research in Computer and Communication Engineering
Previous papers focus on system level description of the user concept of cooperation. It concentrates on physical layer issues, with the anticipation that any higher level overhead will be negligible compared to the gains. The type of cooperation focused on, is the cooperation of active users, i.e., users who have information of their own to send and thus do not want to simply be another user's relay. Cooperative relaying is an effective technique to combat multipath fading, improve system capacity and enhance the coverage.