Secure Massive MIMO Relaying Systems in a Poisson Field of Eavesdroppers

Abstract

Abstract-A cooperative relay network in the presence of eavesdroppers, whose locations are distributed according to a homogeneous Poisson point process, is considered. The relay is equipped with a very large antenna array and can exploit maximal ratio combing (MRC) in the uplink and maximal ratio transmission (MRT) in the downlink. We consider a realistic model that the channel state information of every eavesdropper is not know as eavesdroppers tend to hide themselves in practice. The destination is thus in a much weaker position than all the eavesdroppers because it only receives the retransmitted signal from the relay. Under such setting, we investigate the security performance in two schemes for relaying operation: amplify-andforward (AF) and decode-and-forward (DF). The secrecy outage probability, the connection outage probability, and the trade-off problem which is controlled by the source power allocation are examined. Finally, suitable solutions for the source power (such that once the transmission occurs with high reliability, the secure risk is below a given threshold) are proposed for a trade-off between security and reliability issue.

Secure Massive MIMO System with Two-Way Relay Cooperative Transmission in 6G Networks

“…For secure transmission issues with relay collaboration, most of the existing works [21][22][23][24][25][26][27][28][29][30][31][32][33]37] do not simultaneously address the power allocation, resource utilization, and multiple relay selection in a scenario where information leakage happens at both transmission phases in massive MIMO networks with limited time-frequency resources. In this paper, we present a cooperative transmission mode for the security issue of massive MIMO two-way relay networks.…”

“…By exploiting wireless transmission properties, physical-layer security has attracted considerable attentions in massive MIMO networks [16,17]. Several efforts such as artificial noise [18][19][20], antenna/relay selection [21][22][23], and cooperative strategies [24][25][26][27] have been employed to deal with the information leakage by eavesdroppers. The utilization of antenna correlation diversity was demonstrated to improve the secrecy rate of massive MIMO systems [19].…”

“…With the assistance of cooperative relays, the authors in [24] and [25] investigated the secure transmission problem in the presence of passive and active eavesdroppers. Hoang et al [26] investigated the secrecy performance under a practical scenario where the eavesdroppers hide their existence in the system. In [21], Kuhestani et al considered the scenario in a cooperative massive MIMO relay network where untrusted relays act as potential eavesdroppers.…”

Joint Resource Allocation and Power Control Algorithm for Cooperative D2D Heterogeneous Networks

“…Step 2: Each IU transmits the decoded signals to DUR and DUR incorporates signals from DUT and IU by maximum ratio combining (MRC) [25].…”