Minimum interference based resource allocation method in two-hop D2D communication for 5G cellular networks

Resource allocation is one of the challenging tasks for the 5G cellular networks because of introducing device-to-device (D2D) communication with cellular communication. The D2D users reuse the resource block of cellular users (CU) which create interference to each other. This reduces the network throughput. In the dynamic network condition, the D2D communicating devices leave their positions and direct D2D communication is not possible, devices required another device (relay) for further communication in D2D mode. This makes a two hop D2D communication (source-to-relay and relay-to-destination). In the random resource allocation scheme, the eNodeB/base station (BS) allocates the resource block without considering the interference at the relay and destination end. This reduces the network throughput. In order to reduce the interference, a resource allocation method with minimum interference for two-hop D2D communications for the 5G cellular network has been proposed. In this scheme, initially, the BS calculates the interference over each resource block at the relay and destination side. Once, the BS calculates the interference, it allocates that resource block that creates less interference compared to other resource block. In case of resource allocation, the BS gives the high priority to that resource block that creates less interference. Our analysis and result demonstrate that our scheme perform better compared to random allocation scheme.