Multicast service reading and sending method, and related device
The present disclosure discloses a multicast service reading method. The method includes: determining, by user equipment UE, multicast control channel MCCH configuration information, where the MCCH configuration information includes a multicast control channel identifier MCCH-RNTI and MCCH sending period information; determining, by the UE, MCCH sending time information according to the MCCH sending period information; reading, by the UE, an MCCH message according to the MCCH sending time information by using the MCCH-RNTI, where the MCCH message includes configuration information of a multicast service; and reading, by the UE, the multicast service according to the configuration information of the multicast service. Embodiments of the present disclosure further provide a multicast service sending method and a related device. The embodiments of the present disclosure help reduce waste of an MBSFN subframe.
1. A method for a multicast service by a user equipment, comprising:
determining according to a multicast control channel (MCCH) repetition period and an offset parameter, a system frame number corresponding to a frame for an MCCH;
determining a subframe location for the MCCH according to an MCCH subframe starting location, comprising:
determining whether MCCH sending duration information for the MCCH is configured from a base station; and
determining the subframe location by the MCCH subframe starting location and the MCCH sending duration information when the MCCH sending duration information is configured from the base station;
retrieving an MCCH message according to the subframe location and the frame corresponding to the system frame number, the MCCH message comprising configuration information of a multicast service;
receiving the multicast service according to the configuration information;
determining the MCCH changes in a current MCCH modification period; and
retrieving a new MCCH message according to the determination that the MCCH changes, the new MCCH message being retrieved according to the MCCH repetition period and the offset parameter in the current MCCH modification period.
2. The method according to claim 1 , wherein the MCCH subframe starting location is carried from the base station in a system broadcast message or in a dedicated signaling.
3. The method according to claim 1 , wherein when the subframe location depends on the MCCH subframe starting location and the MCCH sending duration information, the determining the subframe location comprises:
determining, according to the MCCH sending duration information, a quantity of subframes for the MCCH; and
determining all subframes for the MCCH according to the quantity of the subframes, the MCCH starting subframe location, the frame corresponding to the system frame number, and a multimedia broadcast multicast service single frequency network (MBSFN) subframe configuration.
4. The method according to claim 1 , wherein the method further comprises:
determining a subframe of an MCCH change notification is a starting subframe corresponding to the MCCH subframe starting location.
5. A method for a multicast service by a base station, comprising:
determining a system frame number corresponding to a frame for a multicast control channel (MCCH) according to an MCCH repetition period and an offset parameter;
when a subframe location for the MCCH is determined only by an MCCH subframe starting location, sending a configuration of an MCCH subframe starting location without a configuration of MCCH sending duration information for the MCCH;
when the subframe location for the MCCH is determined by the MCCH subframe starting location and the MCCH sending duration information, sending the configuration of an MCCH subframe starting location and the configuration of the MCCH sending duration information;
sending an MCCH message according to the subframe location and the frame, the MCCH message comprising configuration information of a multicast service;
sending the multicast service according to the configuration information;
sending a new MCCH message according to the MCCH repetition period and the offset parameter in a current MCCH modification period in which the base station determines the MCCH changes.
6. The method according to claim 5 , wherein when the subframe location depends on the MCCH subframe starting location and the MCCH sending duration information, the determining the subframe location comprises:
determining, according to the MCCH sending duration information, a quantity of subframes for the MCCH; and
determining all subframes for the MCCH according to the quantity of subframes, the frame, a starting subframe, and a multimedia broadcast multicast service single frequency network (MBSFN) subframe configuration.
7. The method according to claim 5 , wherein the method further comprises:
determining a subframe of an MCCH change notification corresponding to the MCCH subframe starting location.
8. An apparatus, comprising:
a processing circuit configured to:
determine according to a multicast control channel (MCCH) repetition period and an offset parameter, a system frame number corresponding to a frame for an MCCH;
determine a subframe location for the MCCH according to an MCCH subframe starting location, comprising:
determine whether MCCH sending duration information for the MCCH is configured from a base station; and
determine the subframe location by the MCCH subframe starting location and the MCCH sending duration information when the MCCH sending duration information is configured from the base station;
retrieve an MCCH message according to the subframe location and the frame corresponding to the system frame number, wherein the MCCH message comprises configuration information of a multicast service; and
a receiving circuit coupled with the processing circuit, the receiving circuit configured to receive the multicast service according to the configuration information;
the processing circuit is further configured to:
determine the MCCH changes in a current MCCH modification period; and
retrieving a new MCCH message according to the determination that the MCCH changes, the new MCCH message being retrieved according to the MCCH repetition period and the offset parameter in the current MCCH modification period.
9. The apparatus according to claim 8 , wherein the MCCH subframe starting location is carried from the base station in a system broadcast message or in a dedicated signaling.
10. The apparatus according to claim 8 , wherein when the subframe location depends on the MCCH subframe starting location and the MCCH sending duration information, the determination of the subframe location comprises:
determine, according to the MCCH sending duration information, a quantity of subframes for the MCCH; and
determine all subframes for the MCCH, according to the quantity of the subframes, the MCCH starting subframe location, the frame corresponding to the system frame number, and a multimedia broadcast multicast service single frequency network (MBSFN) subframe configuration.
11. The apparatus according to claim 8 , wherein the processing circuit is further configured to:
determine a subframe of an MCCH change notification is a starting subframe corresponding to the MCCH subframe starting location.
12. An apparatus, comprising:
a processing circuit configured to:
determine a system frame number corresponding to a frame for a multicast control channel (MCCH) according to an MCCH repetition period and an offset parameter;
a transmitting circuit coupled to the processing circuit, the transmitting circuit configured to:
when a subframe location for the MCCH is determined only by an MCCH subframe starting location, send a configuration of an MCCH subframe starting location without a configuration of MCCH sending duration information for the MCCH;
when the subframe location for the MCCH is determined by the MCCH subframe starting location and the MCCH sending duration information, send the configuration of an MCCH subframe starting location and the configuration of the MCCH sending duration information;
send an MCCH message according to the subframe location and the frame, the MCCH message comprising configuration information of a multicast service; and
send the multicast service according to the configuration information wherein the transmitting circuit is further configured to:
send a new MCCH message according to the MCCH repetition period and the offset parameter in a current MCCH modification period in which the apparatus determines the MCCH changes.
13. The apparatus according to claim 12 , wherein when the subframe location depends on the MCCH subframe starting location and the MCCH sending duration information, the determination of the subframe location comprises:
determine, according to the MCCH sending duration information, a quantity of subframes for the MCCH; and
determine all subframes for the MCCH according to the quantity of subframes, the frame, a starting subframe, and a multimedia broadcast multicast service single frequency network (MBSFN) subframe configuration.
14. The base station apparatus according to claim 12 , wherein the processing circuit is further configured to:
determine a subframe of an MCCH change notification is a starting subframe corresponding to the MCCH subframe starting location.