Traditional cellular systems have depended on coverage areas partitioned into disjoint cells where each user is served by a single base station, without any cooperation. To deal with the resulting inter-cell interference, this work combines the advantages of CoMP along with detection and broadcasting techniques with different channel output suitable for massive MIMO. Two novel interference management techniques, viz. Centralised Interference Cancellation (CIC) and Distributed Interference Cancellation (DIC) to optimise power allocation in a cooperative framework have been proposed. The schemes point out the trade off between achievable performance and computational complexity. Since large number of antennas require mathematical manipulation of big random matrices, a suboptimal two layer decoding method is proposed which combines selection diversity with least mean square filtering.