Research Article

Design and Optimization in MEC-Based Intelligent Rail System by Integration of Distributed Multi-Hop Communication and Blockchain

Table 1

Experiment parameters.

ParametersValue

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 application200 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 rate10–1