ANALYSIS OF OUTAGE PROBABILITY AND INTERCEPT PROBABILITY TRADE-OFF FOR SECURE TWO-WAY RELAYING SCHEMES BETWEEN TWO CLUSTERS OF NODES USING FOUNTAIN CODES

This paper presents two secure two-way relaying schemes between two clusters of nodes: i) 3-phase two-way relaying using Digital Network Coding; ii) conventional 4-phase two-way relaying. In the proposed schemes, one node selected from each cluster will use Fountain codes to encode the original data, and then send encoded packets to nodes in the remaining cluster, with the help of a common relay node. Explicit mathematical expressions are derived to evaluate the outage probability (system outage probability) and intercept probability (system intercept probability) of the proposed schemes over Rayleigh fading channel. Our results show a reliability-security trade-off as well as the impact of system parameters on the network performances.