Sumrate Maximization of Two Way Relay Networks Using Cooperative Protocals
Keywords:
Two Way Relaying, Bidirectional Communications, OFDM, Subcarrier Pairing, Graphical Approach.Abstract
This paper considers the relay assisted co-operative transmission in wireless
networks, Where multiple user pair conduct bidirectional communications via multiple
relays based on Orthogonal Frequency Division Multiplexing (OFDM) transmission. The
main objective is to improve the overall system performance by maximizing the total
throughput. It deals with the joint optimization of channel and relay assignment, subcarrier
allocation as well as relay selection. The problem is formulated as a combinatorial
optimization problem. It mainly deals with two-way relaying and to make it more
governable. It adopted a graph-based approach. Thus the problem is solved optimally in
polynomial time by transforming it into Maximum Weighted Bipartite Matching (MWBM)
problem. The simulation result shows the comparison of the proposed algorithm and the
bench mark along with two relaying protocols. And to evaluate the network total
throughput versus transmit power per node and the number of relays