Handover procedure using resource status information

1. A method comprising:

sending, by a first base station to a second base station, a resource status request message associated with the second base station;

receiving, from the second base station based on the resource status request message, a resource status update message indicating available capacity associated with a network slice; and

sending a handover request message indicating the network slice.

2. The method of claim 1 , wherein the sending the handover request message comprises sending the handover request message based on the available capacity associated with the network slice.

3. The method of claim 1 , further comprising sending a multi-connectivity initiation request message indicating the network slice.

4. The method of claim 1 , wherein the resource status request message comprises at least one of:

a cell identifier of a cell of the second base station; or

a network slice identifier of the network slice, wherein the network slice is associated with the cell.

5. The method of claim 1 , wherein the resource status request message comprises reporting periodicity information that indicates a time duration for the second base station to wait before sending the resource status update message.

6. The method of claim 1 , wherein the handover request message comprises at least one of:

a cell identifier of a cell of the second base station;

a wireless device identifier of a wireless device;

a network slice identifier of the network slice; or

one or more packet flow identifiers of one or more packet flows associated with the network slice.

7. The method of claim 1 , wherein the resource status update message further indicates at least one of:

a cell identifier of a cell of the second base station;

a network slice identifier of the network slice, wherein the network slice is associated with the cell; or

a resource status information element.

8. The method of claim 7 , wherein the resource status information element indicates at least one of:

a radio resource status of the network slice;

an F1 interface load indicator;

a hardware load indicator;

an NG interface load indicator;

a composite available capacity group; or

a network slice overload indicator.

9. The method of claim 1 , further comprising receiving, by the first base station from the second base station, a resource status response message indicating that a resource status measurement has been initiated.

10. The method of claim 9 , wherein the resource status response message comprises at least one of:

a network slice identifier of an accepted network slice;

a network slice identifier of a rejected network slice;

a network slice reject cause value indicating that a traffic load of one or more network slices exceeds a threshold;

a handover reject cause value indicating that the traffic load of the one or more network slices exceeds the threshold; or

an information element indicating that the traffic load of the one or more network slices exceeds the threshold.

11. A first base station comprising:

one or more processors;

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

send, to a second base station, a resource status request message associated with the second base station;

receive, from the second base station based on the resource status request message, a resource status update message indicating available capacity associated with a network slice; and

send a handover request message indicating the network slice.

12. The first base station of claim 11 , wherein the instructions, when executed by the one or more processors, configure the first base station to send the handover request message based on the available capacity associated with the network slice.

13. The first base station of claim 11 , wherein the instructions, when executed by the one or more processors, further configure the first base station to send a multi-connectivity initiation request message indicating the network slice.

14. The first base station of claim 11 , wherein the resource status request message comprises at least one of:

a cell identifier of a cell of the second base station; or

a network slice identifier of the network slice, wherein the network slice is associated with the cell.

15. The first base station of claim 11 , wherein the resource status request message comprises reporting periodicity information that indicates a time duration for the second base station to wait before sending the resource status update message.

16. The first base station of claim 11 , wherein the handover request message comprises at least one of:

a cell identifier of a cell of the second base station;

a wireless device identifier of a wireless device;

a network slice identifier of the network slice; or

one or more packet flow identifiers of one or more packet flows associated with the network slice.

17. The first base station of claim 11 , wherein the resource status update message further indicates at least one of:

a cell identifier of a cell of the second base station;

a network slice identifier of the network slice, wherein the network slice is associated with the cell; or

a resource status information element.

18. The first base station of claim 17 , wherein the resource status information element indicates at least one of:

a radio resource status of the network slice;

an F1 interface load indicator;

a hardware load indicator;

an NG interface load indicator;

a composite available capacity group; or

a network slice overload indicator.

19. The first base station of claim 11 , wherein the instructions, when executed by the one or more processors, further configure the first base station to receive, from the second base station, a resource status response message indicating that a resource status measurement has been initiated.

20. The first base station of claim 19 , wherein the resource status response message comprises at least one of:

a network slice identifier of an accepted network slice;

a network slice identifier of a rejected network slice;

a network slice reject cause value indicating that a traffic load of one or more network slices exceeds a threshold;

a handover reject cause value indicating that the traffic load of the one or more network slices exceeds the threshold; or

an information element indicating that the traffic load of the one or more network slices exceeds the threshold.

21. A non-transitory computer-readable medium storing instructions that, when executed, configure a first base station to:

send, to a second base station, a resource status request message associated with the second base station;

receive, from the second base station based on the resource status request message, a resource status update message indicating available capacity associated with a network slice; and

send a handover request message indicating the network slice.

22. The non-transitory computer-readable medium of claim 21 , wherein the instructions, when executed, configure the first base station to send the handover request message based on the available capacity associated with the network slice.

23. The non-transitory computer-readable medium of claim 21 , wherein the instructions, when executed, further configure the first base station to send a multi-connectivity initiation request message indicating the network slice.

24. The non-transitory computer-readable medium of claim 21 , wherein the resource status request message comprises at least one of:

a cell identifier of a cell of the second base station; or

a network slice identifier of the network slice, wherein the network slice is associated with the cell.

25. The non-transitory computer-readable medium of claim 21 , wherein the resource status request message comprises reporting periodicity information that indicates a time duration for the second base station to wait before sending the resource status update message.

26. The non-transitory computer-readable medium of claim 21 , wherein the handover request message comprises at least one of:

a cell identifier of a cell of the second base station;

a wireless device identifier of a wireless device;

a network slice identifier of the network slice; or

one or more packet flow identifiers of one or more packet flows associated with the network slice.

27. The non-transitory computer-readable medium of claim 21 , wherein the resource status update message further indicates at least one of:

a cell identifier of a cell of the second base station;

a network slice identifier of the network slice, wherein the network slice is associated with the cell; or

a resource status information element.

28. The non-transitory computer-readable medium of claim 27 , wherein the resource status information element indicates at least one of:

a radio resource status of the network slice;

an F1 interface load indicator;

a hardware load indicator;

an NG interface load indicator;

a composite available capacity group; or

a network slice overload indicator.

29. The non-transitory computer-readable medium of claim 21 , wherein the instructions, when executed, further configure the first base station to receive, from the second base station, a resource status response message indicating that a resource status measurement has been initiated.

30. The non-transitory computer-readable medium of claim 29 , wherein the resource status response message comprises at least one of:

a network slice identifier of an accepted network slice;

a network slice identifier of a rejected network slice;

a network slice reject cause value indicating that a traffic load of one or more network slices exceeds a threshold;

a handover reject cause value indicating that the traffic load of the one or more network slices exceeds the threshold; or

an information element indicating that the traffic load of the one or more network slices exceeds the threshold.

31. A system comprising:

a first base station; and

a second base station,

wherein the first base station is configured to:

send, to the second base station, a resource status request message associated with the second base station,

wherein the second base station is configured to:

send, to the first base station and based on the resource status request message, a resource status update message indicating available capacity associated with a network slice, and

wherein the first base station is further configured to:

send a handover request message indicating the network slice.

32. The system of claim 31 , wherein the first base station is configured to send the handover request message based on the available capacity associated with the network slice.

33. The system of claim 31 , wherein the first base station is further configured to send a multi-connectivity initiation request message indicating the network slice.

34. The system of claim 31 , wherein the resource status request message comprises at least one of:

a cell identifier of a cell of the second base station; or

a network slice identifier of the network slice, wherein the network slice is associated with the cell.

35. The system of claim 31 , wherein the resource status request message comprises reporting periodicity information that indicates a time duration for the second base station to wait before sending the resource status update message.

36. The system of claim 31 , wherein the handover request message comprises at least one of:

a cell identifier of a cell of the second base station;

a wireless device identifier of a wireless device;

a network slice identifier of the network slice; or

one or more packet flow identifiers of one or more packet flows associated with the network slice.

37. The system of claim 31 , wherein the resource status update message further indicates at least one of:

a cell identifier of a cell of the second base station;

a network slice identifier of the network slice, wherein the network slice is associated with the cell; or

a resource status information element.

38. The system of claim 37 , wherein the resource status information element indicates at least one of:

a radio resource status of the network slice;

an F1 interface load indicator;

a hardware load indicator;

an NG interface load indicator;

a composite available capacity group; or

a network slice overload indicator.

39. The system of claim 31 , wherein the second base station is further configured to send, to the first base station, a resource status response message indicating that a resource status measurement has been initiated.

40. The system of claim 39 , wherein the resource status response message comprises at least one of:

a network slice identifier of an accepted network slice;

a network slice identifier of a rejected network slice;

a network slice reject cause value indicating that a traffic load of one or more network slices exceeds a threshold;

a handover reject cause value indicating that the traffic load of the one or more network slices exceeds the threshold; or

an information element indicating that the traffic load of the one or more network slices exceeds the threshold.