缓存辅助的协作NOMA携能传输

doi:10.11959/j.issn.1000-436x.2023107

Abstract

Abstract:

To improve the throughput of multiuser simultaneous wireless information and power transfer systems, a buffer-aided cooperative non-orthogonal multiple access scheme with power transfer was designed to maximize the average throughput under the constraints of average/peak power, user’s rate, and the buffer stability.To reduce the optimization complexity, the Lyapunov’s method was introduced to convert the long-term average optimization problem into a series of time-discrete subproblems, and an adaptive transmission and resource allocation optimization algorithm was proposed, where the working mode, the user scheduling and the power allocation were dynamically optimized according to the time-varying channel/buffer state.Simulation results demonstrate that compared with the existing schemes, the proposed scheme can significantly enhance the average throughput whilst achieving the tradeoff between the delay and throughput.

Key words: cooperative non-orthogonal multiple access, buffer-aided, energy harvesting, user scheduling

CLC Number:

TN929.5

Long YANG, Li ZHAO, Yuchen ZHOU, Bingtao HE, Jian CHEN. Buffer-aided cooperative NOMA with power transfer[J]. Journal on Communications, 2023, 44(6): 77-89.

Figures/Tables 7

References 27

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