Method and device for computing activation time

A method for calculating an active time, the method comprising:

• receiving, by a User Equipment, UE, a sequence number of a current System Frame Number, SFN, cycle in an extended Discontinuous Reception, DRX, cycle, sent by a network side;
• and
• calculating, by the UE, an active time of the present device according to the sequence number of the current SFN cycle in the extended DRX cycle in combination with a preset length of the extended DRX cycle.

A device for notifying of an active time, the device comprising:

• a determining unit configured to determine a sequence number of a current System Frame Number, SFN, cycle in an extended Discontinuous Reception, DRX, cycle;
• and
• a communicating unit configured to notify a User Equipment, UE, of the sequence number of the current SFN cycle in the extended DRX cycle, so that the UE calculates an active time of the UE in the current SFN cycle according to the sequence number in combination with a preset length of the extended DRX cycle.

A device for calculating an active time, the device comprising:

• a communicating unit configured to receive a sequence number of a current System Frame Number, SFN, cycle in an extended Discontinuous Reception, DRX, cycle, sent by a network side;
• and
• a controlling unit configured to calculate an active time of the present device according to the sequence number of the current SFN cycle in the extended DRX cycle in combination with a preset length of the extended DRX cycle.