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Notations | Meanings |
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| The set of mobile users |
| The set of edge servers |
| The task set of mobile user |
| The channel fading coefficient between and |
| The distance between and |
| The power of additive white Gaussian noise (AWGN) |
| The channel rate between and |
| The input size of task for |
| The size of computation results task for |
| The number of CPU clock cycles required by of |
| The computation capability of |
| The computation capability of |
| The actual CPU frequency of for the task of |
| The time delay for locally executing the task |
| The time delay for transmitting the task to |
| The time delay for sending computation results of the task to |
| The time delay for offloading task to without service migration |
| The time delay for migrating computing results of the task of between two edge servers |
| The time delay for offloading task to with service migration |
| The time delay for completing the task for |
| The total time delay for completing all tasks of all users |
| The average power when the CPU of is working |
| The average power is idle |
| The average power is receiving computation results |
| The transmission power of for transmitting tasks to |
| The energy consumption at for locally executing |
| The energy consumption at for offloading to without migration |
| The energy consumption at for offloading to with migration |
| The energy consumption at for completing its all tasks |
| 1 if transmits to , and otherwise 0 |
| 1 if transmits computing results for of to , and otherwise 0 |
| The average service ratio |
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