Fig. 2
From: Tconns: a novel time-varying context-aware offloading strategy for mobile edge computing
Illustrate the measure of mobile residence time. Suppose the user moving along the direction \(\alpha _0\) at the moment \(t_0\), changes the direction of movement to \(\alpha _1\) at the moment \(t_1\), and the user moves along \(\alpha _2\) again by \(t_2\). Taking cloudlet2 as an example, we estimate the mobile residence time of users within cloudlet2’s service range. The cloudlet position is (a, b), R denotes the service scope of the cloudlet. The user current position is (x, y). The user’s direction of movement \(\mathbf {\alpha }\) and the user moving speed V can be obtained via GPS. D is the straight line distance between the user’s current position and the cloudlet