Information change transmission method and device for single-cell multicast service

A base station comprising:

• transmitting circuitry configured to transmit Single-Cell Multicast Control Channel (SC-MCCH) information;
• and
• generating circuitry configured to generate downlink control information (DCI) which includes (a) a first field indicating an SC-MCCH information change notification and (b) a second field indicating a resource for a transmission of another SC-MCCH information;
• wherein
• the transmitting circuitry is configured to transmit the DCI on a narrowband physical downlink control channel (NPDCCH), and
• the transmitting circuitry is configured to transmit the another SC-MCCH information using the resource indicated by the second field.

A method performed by a base station comprising:

• transmitting Single-Cell Multicast Control Channel (SC-MCCH) information;
• generating downlink control information (DCI) which includes (a) a first field indicating an SC-MCCH information change notification and (b) a second field indicating a resource for a transmission of another SC-MCCH information;
• transmitting the DCI on a narrowband physical downlink control channel (NPDCCH);
• and
• transmitting the another SC-MCCH information using the resource indicated by the second field.