Advances, Systems and Applications
From: Joint optimization of network selection and task offloading for vehicular edge computing
Symbol | Definition |
---|---|
L | The set of the cells |
r | The set of cells coverage radius |
uk | The task for vehicle k |
sk | The computation input data bits of task uk |
wk | The CPU cycles required to process the task uk |
\(f_{l}^{k}\) | The computation capacity of on-board device |
Cj | The total computing power of edge server j |
\(f_{m}^{j}\) | The computation capacity allocated to the vehicle by edge server j |
Io | The size of each TU |
ri,k | The maximal uplink rate assigned to the vehicle k through AP i |
\(T_{i,k}^{AP}\) | The waiting time of the vehicle k due to insufficient bandwidth of AP i |
\(T_{j,k}^{Q}\) | The queuing delay of the task execution on edge server j |
\(T_{i,j}^{C}\) | The communication delay from AP i to edge server j |
\(N_{k}^{s}\) | The number of TUs that can be completed in the cell |
\(\alpha _{k}^{s}\) | The proportion of the number of TUs offloaded to the edge server |
\(T_{i,k}^{s,tra}\) | The transmission latency of the offloading task that the vehicle k needs to complete in the cell |
\(T_{k}^{s,loc}\) | The time for processing the TUs locally in the vehicle k |
\(T_{j,k}^{s,pro}\) | The time for processing the TUs offloaded by the vehicle k to the edge server j |
\(T_{k}^{s}\) | The total latency of completing the allocated computing tasks in the cell |