Secrecy-based Channel Assignment for Device-to-Device Communication: An Auction Approach

Device-to-device (D2D) communication has revealed great potential to satisfy the soaring wireless data demands. As a key point, interference management should be carefully investigated. Different from the view that D2D transmissions cause harmful interference to cellular communication when reusing the same channels, we deem such interference as a kind of spontaneous interference against eavesdropping and use this interference to guarantee the secrecy capacity of cellular communication. Hence D2D pairs could have their own D2D transmission without violating secrecy-based cellular communication. Also, we utilize secrecy outage probability to overcome the difficulty in accurately obtaining channel gains at the eavesdropper. On the other hand, we take the advantage of auction algorithm to derive the channel assignment policy, such that multiple D2D pairs are assigned different channels with low complexity. Simulation results demonstrate that our algorithm works well and converges quickly.