Multitier Service Migration Framework Based on Mobility Prediction in Mobile Edge Computing

Table 1

Key notations.

Notations	Description
	Map based on road information and MEC server deployment location
	Digital map information
	Movement speed of user
	Level of latency at which user offloads task
	Current location of user
	Direction of the movement of user
	Coverage distance of MEC server on the current road
	Size of container image
	Bandwidth between two MEC servers
	Size of the first memory data snapshot
	Threshold for iterative synchronization of dirty memory data
	Size of dirty memory during handoff
	Network latency at the local MEC server
	Network latency at the regional MEC server
	Computing delay at a MEC server
	Signal for switching wireless network
tmt	Total migration time: sum of precopy time and service downtime