基于混合协作NOMA的安全MEC能耗优化

doi:10.12305/j.issn.1001-506X.2024.03.39

Abstract

Abstract:

The extensive application of non-orthogonal multiple access (NOMA) technology has changed the limitations of traditional physical layer security on user transmission rates, increasing system energy consumption while reducing time delay. For the problem of secure communication and energy consumption reduction, a secure edge computing transmission method is proposed based on hybrid collaborative NOMA. This method designs a multi-slot hybrid collaboration scheme for each user's data processing, and sets respective offloading decisions based on the information channel conditions of different users, so as to ensure fairness among users, with closed expressions for the system's secrecy outage probability derived. After that, in a bid to minimize system energy consumption, a three-step iterative optimization algorithm based on block coordinate descent is employed to obtain the optimal unloading scheme. The simulation results demonstrate that the proposed solutions can effectively reduce system energy consumption while ensuring information security.

Key words: non-orthogonal multiple access (NOMA), physical layer security, mobile edge computing, outage probability, block coordinate descent

CLC Number:

TP929.5

Xueyong YU, Xincheng FU, Hongbo ZHU. Optimization of energy consumption with hybrid cooperative NOMA for secure MEC[J]. Systems Engineering and Electronics, 2024, 46(3): 1116-1124.

Figures/Tables 9

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References 28

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参数	数值	参数	数值
B/MHz	1	T/s	0.1
L_k/bit	2×10⁵	ε	0.1
σ_b²、σ_e²/dBm	-70	ξ_k	10^－28
c_k/(cycles/bit)	10³	l_k^max	1.6×10⁵
d_e,k/m	60	ω	4
d_b,k/m	100	ζ	0.01

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Optimization of energy consumption with hybrid cooperative NOMA for secure MEC

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