Table 1: System parameters.

Parameter Description Comments/Units

Expected availability time Time units
Reached availability time Time units
Service availability Percentage,
Service availability per services Percentage,
Number of services (VNFs) Integer number
Service identifier
Initial time of service Time units
Power demanded by the service Power units
Number of available drones Integer number
Drone identifier
Battery capacity of drone Power x Time units
Battery lifetime of drone for service Time units
Battery replacement time of drone Time units