ESTIMATION OF THE FEASIBILITY OF UNDERLAY INBAND DEVICE-TO-DEVICE COMMUNICATION BASED ON RADIO CONDITIONS IN LTE

Device-to-Device (D2D) communication, a feature of LTE-Advanced, allows the UEs to communicate with each other directly, rather than hopping through the eNodeB. It can offer many different advantages, including increased resource utilization. However, in underlay inband mode, D2D operation with limited interference level is a pivotal factor for the expected outcome. This restricts the feasibility of setting up a D2D communication unless proper radio conditions can be met. A prior estimation of such feasibility can help in optimized handling of the radio network. In this paper, we propose a novel but simple computation method, based on ensuring sufficiently high signal-to-noise ratio (SINR), to quickly estimate the feasibility of setting up underlay inband D2D communications in a cell. We also demonstrate sample computations using the proposed method.