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arXiv 2102.08119eess.SP
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具有回程知识的认知小蜂窝网络中的发射机选择

Transmitter Selection for Secrecy in Cognitive Small-Cell Networks with Backhaul Knowledge

Burhan Wafai, Chinmoy Kundu, Ankit Dubey, Jinghua Zhang, Mark F. Flanagan

摘要:

考虑了具有多个发射机和不可靠的无线回程的小小区网络用于保密增强。小小区网络在认知无线电系统中与主网络的频谱共享协议下操作。在主接收器处的期望中断概率上的约束被假定为频谱共享协议的一部分。无线回程链路的可靠性由一组独立同分布的伯努利随机变量来建模。根据信道状态信息的可用性,提出了次优和最优的小小区发射机选择(TS)方案,以提高系统的性能。选择方案被设计用于其中关于哪些回程链路是活动的知识可用的场景。导出了相应的秘密中断概率及其渐近表达式。结果表明,保密性能显着提高的情况下,其中的知识的活动回程链路是不可用的。

英文摘要:

A small-cell network with multiple transmitters and unreliable wireless backhaul is considered for secrecy enhancement. The small-cell network is operating under a spectrum sharing agreement with a primary network in a cognitive radio system. A constraint on the desired outage probability at the primary receiver is assumed as a part of the spectrum sharing agreement. The reliability of the wireless backhaul links are modeled by a set of independent and identically distributed Bernoulli random variables. A sub-optimal and an optimal small-cell transmitter selection (TS) scheme is proposed to improve the performance of the system, depending on the availability of channel state information. Selection schemes are designed for the scenario where knowledge is available regarding which backhaul links are active. The corresponding secrecy outage probabilities along with their asymptotic expressions are derived. It is shown that the secrecy performance is significantly improved compared to the case where knowledge of the active backhaul links is unavailable.

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