Clustering Ant Colony-Based Edge-Server Location Strategy in Mobile Crowdsensing

Table 1

Main used notations.

Symbol	Meaning
	The central cloud server
	The set of mobile edge servers
	The set of mobile users
	The set of data types
	The set of data items with a user
	The configuration of data types that a mobile edge server can operate on them
	The set of data types with a user
	The corresponding set of mobile edge servers for a user
	The processing cost of any configuration; (unit: in terms of time, storage, and energy)
	The incremental processing cost of a data type; (unit: in terms of time, storage, and energy)
	The activation cost of mobile edge server; (unit: in terms of time, storage, and energy)
	The facility cost for activating edge server with configuration; (unit: in terms of time, storage, and energy)
	The service cost of a user; (unit: in terms of time, storage, and energy)