Secrecy Rate Maximization with Outage Constraint in Multihop Relaying Networks

TL;DR

This paper investigates optimizing secure multihop wireless transmissions with adaptive coding and routing to maximize secrecy rate under outage constraints, considering random eavesdropper distribution.

Contribution

It introduces an optimal design framework for wiretap coding and routing strategies in multihop networks with secrecy constraints, including exact rate expressions and a revised routing algorithm.

Findings

Optimal wiretap code parameters derived

Secure routing strategy formulated and solved

Simulation confirms effectiveness of the proposed methods

Abstract

In this paper, we study the secure transmission in multihop wireless networks with randomize-and-forward (RaF) relaying, in the presence of randomly distributed eavesdroppers. By considering adaptive encoder with on-off transmission (OFT) scheme, we investigate the optimal design of the wiretap code and routing strategies to maximize the secrecy rate while satisfying the secrecy outage probability (SOP) constraint. We derive the exact expressions for the optimal rate parameters of the wiretap code. Then the secure routing problem is solved by revising the classical Bellman-Ford algorithm. Simulation results are conducted to verify our analysis.