Research Article
Design and Optimization in MEC-Based Intelligent Rail System by Integration of Distributed Multi-Hop Communication and Blockchain
| Parameters | Value |
| The number of nodes | 5 | CPU cycles required to generate and verify a signature | 2 Mcycles [23] | CPU cycles required to generate and verify a MAC | 1 Mcycles [23] | Average transaction size | 20 kB | Average computing resources of MEC servers | 4 × 1010–6 × 1010 CPU cycles/s [2] | Size of offloading task | 500 kB | Computation density of application | 200 CPU cycles/bit [2] | Unit price for data relaying | 500–1000 | Unit price for data computation | 2000–3000 | Weights of latency | 0.6 | Weights of cost | 0.4 | Learning rate | 10–1 |
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