Designing Multi-Hop Relaying Schemes in Cluster Networks Under Constraint of Intercept Probability with Presence of Multiple Eavesdroppers

This paper designs multi-hop relaying schemes to enhance end-to-end (e2e) outage performance of cluster networks with presence of multiple eavesdroppers. The legitimate transmitters such as source and relays have to reduce their transmit power so that the e2e intercept probability (IP-e2e) is below a required threshold. Three node selection algorithms (named RAN, BNS and SNS) are applied at each hop to help the source–destination transmission, where RAN randomly selects a cluster node, BNS selects the node with highest channel gain, and SNS selects one of successfully decoding nodes. We derive exact expressions of the e2e outage probability (OP-e2e) of the considered scheme over Rayleigh fading channel. The expressions of OP-e2e and IP-e2e are then verified by simulations.