Optimal uplink and downlink resource allocation for wireless powered cellular networks

摘要: In this paper, we characterize optimal resource allocation for the uplink and downlink of wireless powered cellular networks (WPCNs). particular, investigate a time-slotted WPCN, where hybrid access point (HAP) is in charge energy replenishing M users (CUs), along with transmission/reception information to/from them. Unlike prior works, which give attention to transmission only one direction (either or downlink), our work incorporates both directions, transfer over downlink. Besides harvesting explicitly from HAP, each user opportunistically harvests RF borne by sent HAP remaining M−1 users, order boost its throughput. Towards objective, formulate total (uplink downlink) sum throughput maximization problem time energy, information, slots, subject constraints. Furthermore, establish convexity problem, an efficient algorithm based on gradient projection method proposed. The obtained numerical results reveal valuable insights about fairness-throughput trade-offs. Moreover, among others, network dynamics are introduced, clarify how pattern changed accordance change users' placement, HAP's power, slots.