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The Record-based Lifetime-Aware Storage Trimming (RLAST) protocol has been proposed to improve message storage efficiency in epidemic routing for Vehicular Delay Tolerant Networking (DTN). While RLAST aims to suppress redundant message storage, its effectiveness under different storage constraints and traffic conditions has not been fully clarified. This paper re-evaluates the performance of RLAST through simulation experiments conducted under varying storage capacities, message generation intervals, and vehicle densities. By comparing RLAST with conventional Epidemic Routing, we analyze how lifetime-aware storage control influences buffer usage, delivery performance, delay, and communication overhead. The results show that RLAST effectively reduces storage usage and overhead in low-density scenarios, while maintaining delivery performance comparable to Epidemic Routing in most cases. These findings provide practical insight for the applicability and limitations of lifetime-based storage control in vehicular DTN environments.

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Assessment of RLAST Protocol for Different Storage and Traffic Conditions

  • 会议论文

  • 发表日期：

    2026年

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  • Haruki Okazaki,
  • Hiroki Fukue,
  • Makoto Ikeda,
  • Leonard Barolli

摘要

The Record-based Lifetime-Aware Storage Trimming (RLAST) protocol has been proposed to improve message storage efficiency in epidemic routing for Vehicular Delay Tolerant Networking (DTN). While RLAST aims to suppress redundant message storage, its effectiveness under different storage constraints and traffic conditions has not been fully clarified. This paper re-evaluates the performance of RLAST through simulation experiments conducted under varying storage capacities, message generation intervals, and vehicle densities. By comparing RLAST with conventional Epidemic Routing, we analyze how lifetime-aware storage control influences buffer usage, delivery performance, delay, and communication overhead. The results show that RLAST effectively reduces storage usage and overhead in low-density scenarios, while maintaining delivery performance comparable to Epidemic Routing in most cases. These findings provide practical insight for the applicability and limitations of lifetime-based storage control in vehicular DTN environments.