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1. (WO2019063086) CONTEXT TRANSFER VIA LAST VISITED RAN NODE
Nota: Texto obtenido mediante procedimiento automático de reconocimiento óptico de caracteres.
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Claims:

1 . Apparatus, comprising at least one processor, at least one memory including computer program code, and the at least one processor, with the at least one memory and the computer program code, being arranged to cause the apparatus to at least perform

checking if a terminal is in an inactive state in a notification area,

monitoring if the terminal moves from a last visited cell of the notification area to a new cell outside the notification area;

instructing the terminal to provide an anchor base station identifier of an anchor base station, a context identifier of a context for the terminal, and at least one of a last visited cell identifier of the last visited cell and a last visited base station identifier of a last visited base station to the new base station if the terminal is in the inactive state and moves from the last visited cell to the new cell; wherein

the last visited cell belongs to the last visited base station;

the new cell belongs to the new base station.

2. The apparatus according to claim 1 , wherein at least one of the anchor base station identifier, the context identifier, and the at least one of the last visited cell identifier and the last visited base station identifier is provided along with the informing of the new cell on the location update of the terminal from the last visited cell to the new cell.

3. Apparatus, comprising at least one processor, at least one memory including computer program code, and the at least one processor, with the at least one memory and the computer program code, being arranged to cause the apparatus to at least perform

monitoring if a new base station receives, from a terminal, location update information for the terminal, an anchor base station identifier of an anchor base station, a context identifier of a context, and at least one of a last visited cell identifier of a last visited cell and a last visited base station identifier of a last visited base station;

checking if a first direct connection between the new base station and the anchor base station exists if the location update information and the anchor base station identifier are received;

instructing the new base station to request the context from the anchor base station via the last visited base station if the first direct connection does not exist and the at least one of the last visited cell identifier and the last visited base station identifier is received; wherein the request for the context from the anchor base station comprises the anchor base station identifier and the context identifier.

4. The apparatus according to claim 3, wherein the at least one processor, with the at least one memory and the computer program code, being arranged to cause the apparatus to further perform,

if the last visited cell identifier of the last visited cell is received and the last visited base station identifier is not received, identifying the last visited base station based on the last visited cell identifier, wherein the last visited cell belongs to the last visited base station.

5. The apparatus according to any of claims 3 and 4, wherein at least one of the anchor base station identifier, the context identifier, and the at least one of the last visited cell identifier and the last visited base station identifier are comprised in the location update information from the terminal.

6. The apparatus according to any of claims 3 to 5, wherein the context is requested via a second direct connection between the new base station and the last visited base station.

7. The method according to any of claims 3 to 6, wherein at least one of the first direct connection and, if dependent on claim 6, the second direct connection is based on an Xn interface.

8. Apparatus, comprising at least one processor, at least one memory including computer program code, and the at least one processor, with the at least one memory and the computer program code, being arranged to cause the apparatus to at least perform

supervising if a last visited base station receives a request for a context from a new base station, wherein the request for the context comprises an anchor base station identifier of an anchor base station and a context identifier of the context;

instructing the last visited base station to ask the anchor base station for the context if the last visited base station receives the request;

monitoring if the last visited base station receives the context from the anchor base station in response to the asking for the context;

prompting the last visited base station to forward the context to the new base station in response to the received request if the last visited base station receives the context.

9. The apparatus according to claim 8, wherein at least one of:

the anchor base station is asked for the context via a first direct connection between the last visited base station and the anchor base station; and

the request is received and the context is forwarded via a second direct connection between the last visited base station and the new base station.

10. The method according to claim 9, wherein the at least one of the first direct connection and the second direct connection is based on an Xn interface.

1 1 . The apparatus according to any of claims 8 to 10, wherein the at least one processor, with the at least one memory and the computer program code, being arranged to cause the apparatus to at least perform

checking, if the request is received, if the anchor base station identifier identifies the last visited base station;

inhibiting the instructing of the last visited base station if the anchor base station identifier identifies the last visited base station.

12. Method, comprising

checking if a terminal is in an inactive state in a notification area,

monitoring if the terminal moves from a last visited cell of the notification area to a new cell outside the notification area;

instructing the terminal to provide an anchor base station identifier of an anchor base station, a context identifier of a context for the terminal, and at least one of a last visited cell identifier of the last visited cell and a last visited base station identifier of a last visited base station to the new base station if the terminal is in the inactive state and moves from the last visited cell to the new cell; wherein

the last visited cell belongs to the last visited base station;

the new cell belongs to the new base station.

13. The method according to claim 12, wherein at least one of the anchor base station identifier, the context identifier, and the at least one of the last visited cell identifier and the last visited base station identifier is provided along with the informing of the new cell on the location update of the terminal from the last visited cell to the new cell.

14. Method, comprising

monitoring if a new base station receives, from a terminal, location update information for the terminal, an anchor base station identifier of an anchor base station, a context identifier of a context, and at least one of a last visited cell identifier of a last visited cell and a last visited base station identifier of a last visited base station;

checking if a first direct connection between the new base station and the anchor base station exists if the location update information and the anchor base station identifier are received;

instructing the new base station to request the context from the anchor base station via the last visited base station if the first direct connection does not exist and the at least one of the last visited cell identifier and the last visited base station identifier is received; wherein the request for the context from the anchor base station comprises the anchor base station identifier and the context identifier.

15. The method according to claim 14, further comprising

if the last visited cell identifier of the last visited cell is received and the last visited base station identifier is not received, identifying the last visited base station based on the last visited cell identifier, wherein the last visited cell belongs to the last visited base station.

16. The method according to any of claims 14 and 15, wherein at least one of the anchor base station identifier, the context identifier, and the at least one of the last visited cell identifier and the last visited base station identifier are comprised in the location update information from the terminal.

17. The method according to any of claims 14 to 16, wherein the context is requested via a second direct connection between the new base station and the last visited base station.

18. The method according to any of claims 14 to 17, wherein at least one of the first direct connection and, if dependent on claim 17, the second direct connection is based on an Xn interface.

19. Method, comprising

supervising if a last visited base station receives a request for a context from a new base station, wherein the request for the context comprises an anchor base station identifier of an anchor base station and a context identifier of the context;

instructing the last visited base station to ask the anchor base station for the context if the last visited base station receives the request;

monitoring if the last visited base station receives the context from the anchor base station in response to the asking for the context;

prompting the last visited base station to forward the context to the new base station in response to the received request if the last visited base station receives the context.

20. The method according to claim 19, wherein at least one of:

the anchor base station is asked for the context via a first direct connection between the last visited base station and the anchor base station; and

the request is received and the context is forwarded via a second direct connection between the last visited base station and the new base station.

21 . The method according to claim 20, wherein the at least one of the first direct connection and the second direct connection is based on an Xn interface.

22. The method according to any of claims 19 to 21 , further comprising

checking, if the request is received, if the anchor base station identifier identifies the last visited base station;

inhibiting the instructing of the last visited base station if the anchor base station identifier identifies the last visited base station.

23. A computer program product comprising a set of instructions which, when executed on an apparatus, is configured to cause the apparatus to carry out the method according to any of claims 12 to 22.

24. The computer program product according to claim 23, embodied as a computer-readable medium or directly loadable into a computer.