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In this paper, the authors present a novel approach to cooperation in wireless communication network i.e., the use of dual frequency band per node in a network. The dualband node uses one of its bands to transmit own data while the other band is used to relay other node's data. In this paper, they compare the use of both Return-Trip-Time (RTT) and Channel State Information (CSI) metric to locally select channel for either primary data transmission or relaying of other node's data. Simulation results show that this new approach has a considerable gain in term of percentage cooperative gain and the end-to-end throughput when compared with an in-band channel approach.
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