Method for receiving multicast control channel change notification and user equipment

A user equipment, comprising:

• an occasion acquisition unit configured to acquire transmission occasions of an MCCH change notification, wherein the occasion acquisition unit is configured to acquire a notification period and a notification allocation offset of the MCCH change notification and acquire the transmission occasions of the MCCH change notification according to a System Frame Number, SFN, and the acquired notification period and notification allocation offset and
• wherein the occasion acquisition unit is configured to, when the notification period is less than or equal to the Maximum System Frame Number, MaxSFN, perform a modulo operation on the SFN and the notification period and acquire specified sub-frame positions of the system frame as the transmission occasions of the MCCH change notification when the result of the operation is equal to the notification allocation offset;
• and
• a notification reception unit configured to receive the MCCH change notification for at least N times at the transmission occasions of the MCCH change notification if no MCCH change notification is received during an MCCH modification period, wherein N is a predetermined number of times that the MCCH change notification should be received.

A method for transmitting a Multicast Control Channel, MCCH, change notification, comprising:

• acquiring, by a base station, transmission occasions of the MCCH change notification, wherein acquiring by the base station the transmission occasions of the MCCH change notification comprises:
• acquiring, by the base station, a notification period and a notification allocation offset of the MCCH change notification;
• and
• acquiring the transmission occasions of the MCCH change notification according to a System Frame Number, SFN, and the acquired notification period and notification allocation offset, and
• wherein the acquiring the transmission occasions of the MCCH change notification according to the SFN and the acquired notification period and notification allocation offset comprises:
• when the notification period is less than or equal to the Maximum System Frame Number, MaxSFN, performing, by the base station, a modulo operation on the SFN and the notification period and acquiring specified sub-frame positions of the system frame as the transmission occasions of the MCCH change notification when the result of the operation is equal to the notification allocation offset;
• and
• transmitting the MCCH change notification for at least N times to a user equipment at the transmission occasions during an MCCH modification period, wherein N is a predetermined number of times that the MCCH change notification is transmitted.

A device for transmitting a Multicast Control Channel, MCCH, change notification, comprising:

• an occasion acquisition unit configured to acquire transmission occasions of the MCCH change notification,
• wherein the occasion acquisition unit is configured to acquire a notification period and a notification allocation offset of the MCCH change notification and acquire the transmission occasions of the MCCH change notification according to a System Frame Number, SFN, and the acquired notification period and notification allocation offset, and
• wherein the occasion acquisition unit is configured to, when the notification period is less than or equal to the Maximum System Frame Number, MaxSFN, perform a modulo operation on the SFN and the notification period and acquire specified sub-frame positions of the system frame as the transmission occasions of the MCCH change notification when the result of the operation is equal to the notification allocation offset;
• and
• a notification transmission unit configured to transmit the MCCH change notification for at least N times to a user equipment during an MCCH modification period at the transmission occasions acquired by the occasion acquisition unit, wherein N is a predetermined number of times that the MCCH change notification is transmitted.