Incentive/reward based relay selection for device to device communication
Uyoata Uyoata, Mqhele E. Dlodlo · 2017
Device to Device(D2D) communication has been enumerated as one of the enabling technologies for future wireless communication. D2D communication exploits devices proximity to allow direct communication between the devices and in situations where the channels between the devices do not allow direct communication, relays can be introduced. In analysing/addressing the problem of relay selection in D2D communication, the rationality of the relaying devices have largely been ignored. Hence this work aims at rewarding relay nodes to participate in D2D communication. We formulate the problem of selecting relays as an optimization problem aimed at improving the total system throughput while satisfying the utility of the relays. The relay assesses the value of the utility that taking part in relaying for a D2D pair offers and decides to relay or not. In this paper we propose a throughput based utility to encourage relays to forward signals and employ stable matching based relay selection algorithm. The utility which determines relay incentive is obtained from the difference between the throughput of the relay path and the direct D2D path. That is the relay selection algorithm is aimed at optimising the difference between the benefit of direct D2D communication and the benefit of relay assisted D2D communication. Performance evaluation shows that our proposed algorithm approaches the Khun Munkres assignment algorithm for wide distances (>50m) between source — destination pairs.