Some content of this application is unavailable at the moment.
If this situation persist, please contact us atFeedback&Contact
1. (WO2018143863) METHODS AND DEVICES FOR CONTROLLING HANDOVER PROCEDURES IN A WIRELESS COMMUNICATION NETWORK
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

CLAIMS

1. A method performed by a source access network node (1 ) in a wireless communication network for controlling an uplink measurement procedure for signals transmitted from a User Equipment (2), UE (2), to at least one candidate access network node (3), the method comprises:

- providing (S1 ) a representation of a first uplink resource to the UE (2) and the at least one candidate access network node (3), said first uplink resource to be used for transmission of a signal by the UE (2) for the at least one candidate access network node (3) to perform measurements on; and

- providing (S2), based on an indication that no measurement was performed by a specific candidate access network node (3) on the signal transmitted using said uplink resource, a representation of a second uplink resource to the UE (2) and to the specific candidate access network node (3).

2. The method according to claim 1 , wherein said indication that no measurement was performed is obtained from a message, provided by the specific candidate access network node (3), specifying that no measurement was performed.

3. The method according to claim 2, wherein said message also comprises a suggestion of at least one uplink resource allocation that are suitable as the second uplink resource allocation for the specific candidate access network node (3) to enable the source access network node (1 ) to provide a representation of a second uplink resource based on the suggestion.

4. The method according to claim 1 , wherein said indication that no measurement was performed comprises an indication that no response relating to the measurement of a signal transmitted using said uplink resource was obtained from a specific candidate access network node (3) within a pre-determined time limit.

The method according to any of the claims 1 -4, wherein the method performed until a measurement report relating to the measurement of a sign

transmitted using a provided representation of an uplink resource has been received from each candidate access network node (3) of at least a specified subset of the candidate access network node(s) (3).

6. The method according to any of the claims 1 -5, wherein the step (S1 ) of providing a representation of first uplink resource to the UE (2) and the at least one candidate access network node (3), comprises to provide a representation of a first uplink resource that has been negotiated between the source access network node (1 ) and the candidate access network nodes.

7. The method according to any of the claims 1 -6, wherein the method further comprises performing measurements on said signal transmitted by said UE (2) using said first uplink resource in order to determine the quality of the radio link between the source access network node (1 ) and the UE (2).

8. A method performed by a source access network node (1 ) in a wireless communication network for selecting, from a set of candidate access network nodes (3), a target access network node (3a) for a User Equipment (2) during handover, the method comprises:

- controlling an uplink measurement procedure according to any of the claims 1 -7, to ensure that at least a subset of the candidate access network nodes (3) are able to perform measurements on an uplink resource;

- collecting (S3) measurement reports from said subset of candidate access network nodes (3); and

- selecting (S4), based at least partially on said measurement reports, a target access network node (3a) for the UE (2) to establish a radio link with during handover.

9. The method according to claim 8, wherein the step (S4) of selecting a target access network node (3a) is further based on measurements of the quality of the radio link between the source access network node (1 ) and the UE (2).

10. The method according to claim 10, wherein the step (S4) of selecting a target access network node (3a) comprises to compare the quality indicated by said collected measurement reports with the quality of the radio link between the source access network node (1 ) and the UE (2) whereby a particular candidate access network node may be selected as the target access network node (3a) if the quality of the radio link between the particular candidate access network node (3) and the UE (2) is better than the quality of the radio link between the source access network node (1 ) and the UE (2).

11. A method for operating a User Equipment (2), UE (2), in a wireless communication network, wherein the method comprises:

- receiving (S10), from a source access network node (1 ) serving the UE (2), a representation of an uplink resource;

- transmitting (S20), using said uplink resource, a signal for a candidate access network node (3) to perform measurements on.

12. The method according to claim 1 1 , wherein said signal transmitted using said uplink resource comprises information specifying an identity feature of the UE (2).

13. The method according to claim 12, wherein said identity feature comprises the identity of the cell in which the UE (2) is served.

14. The method according to claim 12, wherein said identity feature further comprises the identity of the UE (2).

15. A method for operating a candidate access network node (3) in a wireless communication network, wherein the method comprises:

- obtaining (S100), from a source access network node (1 ), a representation of a first uplink resource, said uplink resource to be used by a User

Equipment (2), UE (2), for the transmission of a signal for the candidate access network node (3) to perform measurements on; and

- transmitting (S200) a message to the source access network node (1 ) specifying whether said measurement on the uplink resource was performed to enable the source access network node (1 ) to provide a representation of a second uplink resource based on said message.

16. The method according to claim 15, wherein the message comprises an indication that no measurement was performed and at least one suggestion of a second uplink resource that is suitable for the candidate access network node (3).

17. The method according to claim 15 or 16, wherein said message is transmitted if said first uplink resource collides with a scheduled activity.

18. A source access network node (1 ) configured to control an uplink measurement procedure for signals transmitted from a User Equipment (2), UE

(2), to at least one candidate access network node (3), wherein:

- the source access network node (1 ) is configured to provide a representation of first uplink resource to the UE (2) and the at least one candidate access network node (3), said first uplink resource to be used for transmission of a signal by the UE (2) for the at least one candidate access network node (3) to perform measurements on; and

- the source access network node (1 ) is configured to provide, based on an indication that no measurement was performed by a specific candidate access network node (3) on a signal transmitted using said uplink resource, a representation of a second uplink resource to the UE (2) and to the specific candidate access network node (3).

19. The source access network node (1 ) according to claim 18, wherein the source access network node (1 ) is configured to obtain said indication that no measurement was performed obtained from a message, provided by the specific candidate access network node (3), specifying that no measurement was performed.

20. The source access network node (1 ) according to claim 19, wherein said message also comprises a suggestion of at least one uplink resource allocation that are suitable as the second uplink resource allocation for the specific candidate access network node (3) and wherein the source access network node (1 ) is configured to provide a representation of a second uplink resource based on the suggestion.

21. The source access network node (1 ) according to claim 18, wherein the source access network node (1 ) is configured to obtain an indication that no measurement was performed by determining that no response relating to the measurement of a signal transmitted using said uplink resource was obtained from a specific candidate access network node (3) within a pre-determined time limit.

22.The source access network node (1 ) according to any of the claims 18-21 , wherein the source access network node (1 ) is configured to control the uplink measurement procedure until a measurement report relating to the measurement of a signal transmitted using a provided representation of an uplink resource has been received from each candidate access network node (3) of at least a specified subset of candidate access network node(s) (3).

23. The source access network node (1 ) according to any of the claims 18-22, wherein the source access network node (1 ) is configured to provide a representation of first uplink resource to the UE (2) and the at least one candidate access network node (3), where said first uplink resource has been negotiated between the source access network node (1 ) and the candidate access network nodes.

24. The source access network node (1 ) according to any of the claims 18-23 wherein the source access network node (1 ) is configured to perform measurements on said signal transmitted by said UE (2) using said first uplink resource in order to determine the quality of the radio link between the source access network node (1 ) and the UE (2).

25. A source access network node (1 ) according to any of the claims 18-24, wherein:

- the source access network node (1 ) is further configured to collect measurement reports from said subset of candidate access network nodes

(3); and

- the source access network node (1 ) is further configured to select, based at least partially on said measurement reports, a target access network node (3a) for the UE (2) to establish a radio link with during handover.

26. The source access network node (1 ) according to claim 25, wherein the source access network node (1 ) is also configured to select a target access network node (3a) based on measurements of the quality of the radio link between the source access network node (1 ) and the UE (2).

27. The source access network node (1 ) according to claim 26, wherein the source access network node (1 ) is configured to select a target access network node (3a) by comparing the quality indicated by said collected measurement reports with the quality of the radio link between the source access network node (1 ) and the UE (2), whereby a particular candidate access network node may be selected as the target access network node (3a) if the quality of the radio link between the particular candidate access network node (3) and the UE (2) is better than the quality of the radio link between the source access network node (1 ) and the UE (2).

28. A User Equipment (2), UE (2), wherein:

- the UE (2) is configured to receive, from a source access network node (1 ) serving the UE (2), a representation of an uplink resource; and

- the UE (2) is configured to transmit, using said uplink resource, a signal for a candidate access network node (3) to perform measurements on.

29. The UE (2) according to claim 28, wherein the UE (2) is configured to transmit a signal using said uplink resource that comprises information specifying an identity feature of the UE (2).

30. The UE (2) according to claim 29, wherein said identity feature comprises the identity of the cell in which the UE (2) is served.

31. The UE (2) according to claim 28, wherein said identity feature further comprises the identity of the UE (2).

32. A candidate access network node (3), wherein:

- the candidate access network node (3) is configured to obtain, from a source access network node (1 ), a representation of a first uplink resource, said uplink resource to be used by a User Equipment (2), UE (2), for the transmission of a signal for the candidate access network node (3) to perform measurements on; and

- the candidate access network node (3) is configured to transmit a message to the source access network node (1 ) specifying whether said measurement on the uplink resource was performed to enable the source access network node (1 ) to provide a representation of a second uplink resource based on said message.

33. The candidate access network node (3) according to claim 32, wherein the candidate access network node (3) is configured to transmit a message that comprises an indication that no measurement was performed and at least one suggestion of a second uplink resource that is suitable for the candidate access network node (3).

34. The candidate access network node (3) according to claims 32 or 33, wherein the candidate access network node (3) is configured to transmit said message if said first uplink resource collides with a scheduled activity.

35. A computer program (125;135) comprising instructions, which when executed by at least one processor, cause the at least one processor to:

output a representation of a first uplink resource to be provided to a UE (2) and at least one candidate access network node (3); and

- read an indication specifying whether a measurement was performed by a specific candidate access network node (3) on a signal transmitted using said uplink resource; and

output, based on said indication, a representation of a second uplink resource to be provided to the UE (2) and to the specific candidate access network node (3).

36. A computer program (225;235) comprising instructions, which when executed by at least one processor, cause the at least one processor to:

read a representation of an uplink resource; and

- control the transmission of a signal using said uplink resource, said signal to be transmitted for a candidate access network node (3) to perform measurements on.

37. A computer program (325; 335) comprising instructions, which when executed by at least one processor, cause the at least one processor to:

read a representation of a first uplink resource, said uplink resource to be used by a User Equipment (2), UE (2), for the transmission of a signal for a candidate access network node (3) to perform measurements on; and

output a message to be transmitted to a source access network node (1 ) specifying whether said measurement on the uplink resource was performed to enable the access network node (3) to provide a representation of a second uplink resource based on said message.

38. An apparatus (50) for controlling an uplink measurement procedure for signals transmitted from a User Equipment (2), UE (2), to at least one candidate access network node (3), wherein the apparatus comprises:

an output module (51 ) for outputting a first representation of an uplink resource to be provided to a UE (2) and at least one candidate access network node (3);

a reading module (52) for reading an indication specifying whether a measurement was performed by a specific candidate access network node (3) on a signal transmitted using said uplink resource

an output module (51 ) for outputting, based on said indication, a second representation of an uplink resource to be provided to a UE (2) and at least one candidate access network node (3).

39. An apparatus (500) for operating a User Equipment (2), wherein the apparatus comprises:

a reading module (510) for reading a representation of an uplink resource; and

- a controlling module (520) for controlling the transmission of a signal using said uplink resource, said signal to be transmitted for a candidate access network node (3) to perform measurements on.

40. An apparatus (5000) for controlling the operation of a candidate access network node, wherein the apparatus comprises:

a reading module (5100) for reading a representation of a first uplink resource, said uplink resource to be used by a User Equipment (2), UE (2), for the transmission of a signal for a candidate access network node (3) to perform measurements on; and

- an output module (5200) for outputting a message to be transmitted to a source access network node (1 ) specifying whether said measurement on the uplink resource was performed to enable the source access network node (1 ) to provide a representation of a second uplink resource based on said message.