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| Symbol | Explanation |
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| Denotes the set of points in mobile devices activity area, |
| Denotes the set of mobile devices, |
| Denotes the set of mobile devices positions |
| Denotes the () mobile device in D |
| Denotes the position of dn at time t, , where and represents the latitude and longitude of the location |
| Denotes the set of the cloudlets, |
| Denotes the cloudlet |
| Denotes the set of the central position of the cloudlets |
| Denotes the central position of at time ,
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| Denotes the set of the Aps, |
| Denotes the converage radius for |
| Denotes the mobiles devices collection of at time t,
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| Denotes the Euclidean distance between and , |
| Denotes the mobile devices collection of |
| Denotes the density threshold for cloudlet placement judgment |
| Denotes the number of covered mobile devices by all cloudlets |
| Denotes the mobile device collection of at time |
| Denotes the available positions that cloudlets can only stay |
| Denotes the available position that cloudlets can stay |
| Denotes the edges between adjacent position in V |
| Denotes the edge between two APs and |
| Denotes the weight of all cloudlet available positions |
| Denotes the paths graph in A, |
| Denotes the coordinates of position |
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