Energy-Efficient Secure Short-Packet Transmission in NOMA-Assisted mMTC Networks With Relaying
Energy-Efficient Secure Short-Packet Transmission in NOMA-Assisted mMTC Networks With Relaying
复制标题
NOMA 辅助 mMTC 网络中具有中继功能的节能安全短数据包传输
DOI：
10.1109/tvt.2021.3133907
复制
发表时间：
2022-02-01
影响因子：
6.8
通讯作者：
Zhang, Ping
中科院分区：
文献类型：
--
作者：
Lv, Suyu;Xu, Xiaodong;Zhang, Ping
大规模机器类型通信（mMTC）由ITU提出，以通过蜂窝网络为数十亿机器类型通信设备（MTCD）提供大规模连接服务。然而，MTCD通常是能量受限的，安全能力有限，短分组传输为主。在保证信息传输的机密性和能量效率的同时，大规模MTCD同时进行短分组传输具有很大的挑战。在本文中，我们研究了非正交多址（NOMA）辅助mMTC网络的节能安全短分组传输，其中MTCD旨在通过可信中继在存在被动窃听者的情况下将保密消息传输到目的基站。为了实现安全、可靠和节能的传输，我们通过实现联合中继和功率电平选择来最大化保密能量效率。此外，我们制定了一个分散的无状态Q学习的多智能体强化学习（MARL）算法的动态和复杂的mMTC系统。仿真结果表明，采用分散MARL算法和NOMA中继可以提高SEE的性能，同时减少信息交换开销。
Massive Machine-Type Communication (mMTC) is proposed by ITU to provide a large scale of connectivity services for billions of machine-type communications devices (MTCDs) via cellular networks. However, MTCDs are generally energy-constrained, security capability limited and short-packet transmission dominated. It has great challenges for massive MTCDs to perform short-packet transmission simultaneously while guaranteeing the confidentiality and energy efficiency of the information transmission. In this paper, we investigate the energy-efficient secure short-packet transmission of Non-Orthogonal Multiple Access (NOMA) assisted mMTC networks, in which MTCDs aim to transmit secrecy messages to the destination base station via trusted relays with a passive eavesdropper present. To realize secure, reliable and energy-efficient transmission, we maximize the secrecy energy efficiency (SEE) by implementing joint relay and power level selection. Furthermore, we formulate a decentralized stateless Q-learning-based multi-agent reinforcement learning (MARL) algorithm for the dynamic and complex mMTC systems. The simulation results show that adopting the proposed decentralized MARL algorithm and relaying with NOMA can improve the performance of SEE while reducing information exchange overhead.