Advances, Systems and Applications
Table 1 Notations
Symbol | Meaning |
|---|---|
Di | The amount of data for the i-th task |
Ci | CPU cycles needed to process each bit of data |
Cu,i | CPU frequency of the i-th device |
Cs,j | CPU frequency of the j-th MEC server |
W | Transmission bandwidth |
Si | Transmission power of the i-th device |
Ai,j | Channel gain |
N0 | Noise power spectral density |
ri,j | Transmission rate from local device i to the MEC server j |
\(E_{\max }^{j}\) | Maximum energy consumption constraint of the j-th MEC server |
g | Penalty factor |
\(T_{i}^{j}\) | The total delay from local device i to the MEC server j |
\(E_{i}^{j}\) | The energy consumption from the i-th device to the j-th MEC server |
\(E_{calc,i}^{j}\) | Calculation energy consumption from the i-th device to the j-th MEC server |
\(E_{tran,i}^{j}\) | Transmission energy consumption from the i-th device to the j-th MEC server |
\(T_{mec,i}^{j}\) | Calculation delay from the i-th device to the j-th MEC server |
\(T_{tran,i}^{j}\) | Transmission delay from the i-th device to the j-th MEC server |
M | The number of tasks |
N | The number of MEC servers |