Almost of the cooperative technique have been assumed that the selection users for certain group are predetermined based on location of users in cell and channel conditions between users. However, it is important to develop the efficient algorithms for assigning the terminals with good inter-user channels for cooperating groups. This paper develop coupling algorithm involve optimal partner, since introduce short time for processing and performance of the asymptotic compared with exhaustive search. Numerical results show that the partner coupling algorithm provides the similar average user outage probability to the partner selection algorithm using exhaustive search. Also the average user outage probability of Reed Solomon (RS) coded cooperation increases with the number of users.