联合功率域SPMA协议的动态阈值算法

doi:10.12305/j.issn.1001-506X.2021.08.36

Abstract

Abstract:

Aiming at the problem of statistic priority-based multiple access (SPMA) protocol has a high probability of collision of tactical information under high load, and the network performance cannot meet the requirements of coordinated attack, this paper draws on the application of non-orthogonal multiple access (NOMA) technology on distinguishing simultaneous frequency signals in the power domain. The SPMA protocol signaling mechanism and multiprionity level detection mechanism are improved. The power domain is introduced on the basis of the original time and frequency domain. A joint power domain SPMA protocol performance improvement strategy is proposed, and a dynamic threshold algorithm is designed for the scenario where the arrival rate of each priority packet dynamically changes, in order to reduce the collision probability and improve the network throughput. Simulation results show that the improved strategy and dynamic threshold algorithm can make the network carry more business traffic and improve network throughput.

Key words: data link, non-orthogonal multiple access (NOMA), statistic priority-based multiple access (SPMA), dynamic threshold, probability of collision

CLC Number:

TN92

Yu FANG, Na LYU, Kun CHEN. Dynamic threshold algorithm for SPMA protocol in joint power domain[J]. Systems Engineering and Electronics, 2021, 43(8): 2332-2340.

Figures/Tables 15

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仿真参数	取值
频点数N_f	5
单数据包编码拆分小包数N_b	28
时隙长度l_slot/μs	20
数据包长度L/bits	1 000
退避窗长l_s/μs	40

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Dynamic threshold algorithm for SPMA protocol in joint power domain

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