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Erschienen in:
2019 | OriginalPaper | Buchkapitel
Joint Uplink and Downlink Optimization for Resource Allocation Under D2D Communication Networks
verfasst von : Di He, Guangsheng Feng, Bingyang Li, Hongwu Lv, Huiqiang Wang, Quanming Li
Erschienen in: Wireless Sensor Networks
Verlag: Springer Singapore
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Abstract
We study the joint uplink and downlink (JUAD) resource allocation problem in D2D networks, where D2D sender communicates with D2D recipient by reusing the channel of cellular users (CUs). In order to maximize the throughput of D2D networks, we model the JUAD problem as a mixed integer nonlinear programming problem (MINLP). Since the problem is NP hard, to solve it better, we divide it into two sub-problems by analyzing the structure of the primal problem, including channel assignment and power allocation. Then, we turn the sub-problem of power allocation into convex problem by the Lagrangian dual theory for getting the optimal power value of CUs and D2D pair. Next, an improved Hopcroft-Karp algorithm is proposed to solve the sub-problem of channel allocation, which has lower complexity compared with the traditional channel allocation approaches. Finally, extensive simulations show that our proposed approach achieves a near optimal solution.