Energy and spectrum efficient mobility-aware resource management for D2D multicasting
Abstract The rapid growth of cellular traffic which is mostly due to increasing demands for multimedia and social network applications, has led to spectrum deficiency in cellular networks. Device to Device (D2D) communication is an excellent technology for offloading cellular traffic via direct communication between user equipment reusing cellular radio resources or unlicensed bands. Moreover, using D2D communication, there is a chance of reducing the energy consumption of user equipment. Multicasting is a known scenario of D2D communication which is suitable for some content sharing scenarios such as public safety services and TV broadcasting in ultra-dense networks. Efficient resource management is a challenging problem of D2D multicasting which has not been addressed adequately. This paper proposes an energy and spectrum efficient resource management method for D2D multicast communications which takes user requirements into account. In contrast to previous methods, this work also considers the mobility of user equipment in terms of the stability of possible D2D links using a mobility correlation measure. The multicast group formation and channel/power allocations have been formulated as a multi-objective optimization technique and NSGA-II has been exploited to solve the problem. Simulation results demonstrate the superior performance of the proposed method compared to previous methods in terms of energy and spectrum efficiency.