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Advances, Systems and Applications

Table 1 Notations

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