Joint Redundancy and Blocklength Allocation for Secure-Reliability Performance Optimization in Future V2X Networks

IEEE Transactions on Vehicular Technology, vol. 73, pp. 19826–19831

Abstract

Physical Layer Security (PLS) presents a potential solution to secure and reliable communication in next-generation vehicular networks. This work investigates the impact of redundancy on PLS performance in short-packet transmissions, focusing on its interplay with blocklength allocation. Building on the concept of trading reliability for security, we propose a joint optimization of redundant bits and blocklength, aiming to optimize the secure-reliability performance. We provide the globally optimal solutions for the integer problem by deriving the boundary of the feasible set. To derive a more efficient solution, we offer analytical insights for efficiently solving the relaxed version of this problem by reformulating the problem into a convex one. The numerical results offer guidance in resource allocation, revealing the trade-off between reliability and security in the context of redundant bits.

Authors 5

1. Wuwan Tong Aachen Chair of Information Theory and Data Analytics

   RWTH Aachen University

   Affiliation as printed

   Chair of Information Theory and Data Analytics, RWTH Aachen University, Aachen, Germany

2. HE Yulin

   Wuhan University

   Affiliation as printed

   School of Electronic Information, Wuhan University, Wuhan, China

3. Bin Han

   Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau

   Affiliation as printed

   Division of Wireless Communications and Radio Positioning, RPTU Kaiserslautern-Landau, Kaiserslautern, Germany

4. Rafael F. Schaefer

   Technische Universität Dresden

   Affiliation as printed

   Chair of Information Theory and Machine Learning, Technische Universität Dresden, Dresden, Germany

5. Anke Schmeink Aachen Chair of Information Theory and Data Analytics

   RWTH Aachen University

   Affiliation as printed

   Chair of Information Theory and Data Analytics, RWTH Aachen University, Aachen, Germany