A Mobility-Aware and Sociality-Associate Computation Offloading Strategy for IoT

Table 1

Summary of notations.

Notations	Meanings
	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