Single cell multicast traffic channel scheduling between two base stations

1. A first base station comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the first base station to:

receive, from a second base station, configuration parameters employed by the second base station for at least one broadcast multicast service, the configuration parameters comprising

a first scheduling period start offset; and

first single cell multicast traffic channel (SC-MTCH) scheduling parameters comprising an on-duration timer value for single cell point to multipoint (SCPTM);

determine, based on the configuration parameters, a second scheduling period start offset and second SC-MTCH scheduling parameters; and

transmit, to the second base station, a configuration update acknowledge message indicating an acknowledgement of a broadcast multicast service configuration update based on the configuration parameters.

2. The first base station of claim 1 , wherein the instructions, when executed by the one or more processors, further cause the first base station to transmit, to at least one wireless device, first transport blocks for the at least one broadcast multicast service based on the second scheduling period start offset and the second SC-MTCH scheduling parameters.

3. The first base station of claim 1 , wherein the instructions, when executed by the one or more processors, further cause the first base station to transmit, by the first base station, one message of an updated SIB20 or an updated single cell point to multipoint (SCPTM) Configuration message, the one message comprising one or more parameters for the at least one multicast broadcast service.

4. The first base station of claim 2 , wherein the second base station transmits to the at least one wireless device, second transport blocks for the at least one multicast broadcast service based on the configuration parameters.

5. The first base station of claim 1 , wherein the instructions, when executed by the one or more processors, further cause the first base station to transmit, by the first base station to the second base station, a handover request message for at least one wireless device based at least on the configuration parameters.

6. The first base station of claim 1 , wherein the configuration parameters further comprise at least one of:

a broadcast multicast service session identifier;

a group-radio network temporary identifier (G-RNTI) parameter;

a first discontinuous reception inactivity timer value; or

a cell identifier of an SC-MTCH neighbor cell providing the at least one broadcast multicast service via an SC-MTCH.

7. The first base station of claim 1 , wherein the configuration parameters further comprise at least one of:

a radio frame allocation period;

a radio frame allocation offset; or

one or more subframe allocation parameters.

8. The first base station of claim 1 , wherein the instructions, when executed by the one or more processors, further cause the first base station to receive at least one of:

a broadcast multicast service frequency;

a broadcast multicast session identifier; or

a group-radio network temporary identifier (G-RNTI) of the broadcast multicast service.

9. The first base station of claim 1 , wherein the instructions, when executed by the one or more processors, further cause the first base station to receive at least one of:

a destination layer-2 identifier for the broadcast multicast service;

a broadcast multicast service priority; or

a vehicle-to-everything (V2X) service priority.

10. A first base station comprising:

one or more processors;

memory storing instructions that, when executed by the one or more processors, cause the first base station to:

receive, from a second base station, configuration parameters employed by the second base station for at least one broadcast multicast service, the configuration parameters comprising:

a first discontinuous reception inactivity timer value; and

a first scheduling period start offset;

determine, based on the configuration parameters, a second discontinuous reception inactivity timer value and a second scheduling period start offset; and

transmit, to the second base station, in response to receiving the configuration parameters, a configuration update acknowledge message indicating an acknowledgement of a broadcast multicast service configuration update based on the configuration parameters.

11. The first base station of claim 10 , wherein the instructions, when executed by the one or more processors, further cause the first base station to transmit, to at least one wireless device, first transport blocks for the at least one broadcast multicast service based on the second discontinuous reception inactivity timer value and the second scheduling period start offset.

12. The first base station of claim 10 , wherein the configuration parameters further comprise at least one of:

a broadcast multicast service session identifier;

a group-radio network temporary identifier (G-RNTI) parameter;

single cell multicast traffic channel (SC-MTCH) scheduling parameters comprising an on-duration timer single cell point to multipoint (SCPTM); or

a cell identifier of an SC-MTCH neighbor cell providing the at least one broadcast multicast service via an SC-MTCH.

13. The first base station of claim 10 , wherein the configuration parameters further comprise at least one of:

a radio frame allocation period;

a radio frame allocation offset; or

one or more subframe allocation parameters.

14. The first base station of claim 10 , wherein the instructions, when executed by the one or more processors, further cause the first base station to receive at least one of:

a broadcast multicast service frequency;

a broadcast multicast session identifier; or

a group-radio network temporary identifier (G-RNTI) of the broadcast multicast service.

15. The first base station of claim 10 , wherein the instructions, when executed by the one or more processors, further cause the first base station to receive at least one of:

a destination layer-2 identifier for the broadcast multicast service;

a broadcast multicast service priority; or

a vehicle-to-everything (V2X) service priority.

16. The first base station of claim 10 , wherein the instructions, when executed by the one or more processors, further cause the first base station to transmit, to the second base station in response to receiving the configuration parameters, a configuration update acknowledge message indicating an acknowledgement of a broadcast multicast service configuration update based on the configuration parameters.

17. The first base station of claim 10 , wherein the instructions, when executed by the one or more processors, further cause the first base station to transmit one message of an updated SIB20 or an updated single cell point to multipoint (SCPTM) Configuration message, the one message comprising one or more parameters for the at least one multicast broadcast service.

18. The first base station of claim 11 , wherein the second base station transmits to the at least one wireless device, second transport blocks for the at least one multicast broadcast service based on the configuration parameters.

19. The first base station of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the first base station to transmit, to the second base station, a handover request message for the at least one wireless device based at least on the configuration parameters.

20. The first base station of claim 10 , wherein the instructions, when executed by the one or more processors, further cause the first base station to transmit, to the second base station, a handover request message for at least one wireless device based at least on the configuration parameters.