Admission Control and Power Allocation for NOMA-Based Satellite Multi-Beam Network
Admission Control and Power Allocation for NOMA-Based Satellite Multi-Beam Network
复制标题
基于 NOMA 的卫星多波束网络准入控制和功率分配
DOI:
10.1109/access.2020.2973395
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发表时间:
2020
期刊:
影响因子:
3.9
通讯作者:
Bo Li
中科院分区:
文献类型:
--
作者:
Ruisong Wang;Wenjing Kang;Gongliang Liu;Ruofei Ma;Bo Li
This paper investigates the admission control problem on the satellite multi-beam networks with non-orthogonal multiple access (NOMA). The goal is to maximize the number of supported users on the premise of ensuring the quality of service (QoS) by optimizing the subchannel and power allocation. We provide the system model and then formulate the admission control problem as a mixed integer non-convex optimization problem. The non-convexity and existence of integer variable make the optimal solution difficult to get. Therefore, we propose a joint subchannel matching and power allocation algorithm to obtain the suboptimal solution so as to reduce the computation complexity. The proposed algorithm can be used for both NOMA and orthogonal frequency division multiplexing access (OFDMA). Specifically, the subchannel matching problem is solved by a two-stage matching process where users are accessed to subchannel dynamically. The power allocation problem is modeled as a super-modular game where the existence and uniqueness of Nash equilibrium (NE) are analyzed. Moreover, an iterative power allocation algorithm is proposed based on the NE searching method. Finally, simulation results are provided for demonstrating the effectiveness and feasibility of the proposed algorithm.
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