Abstract
A communication node determines that radio link failure occurred during connected state mobility of an access terminal and reports the radio link failure to another communication node. For example a target access point may determine that radio link failure occurred during handover of an access terminal and send a radio link failure report message to the access point that was previously serving the access terminal or to some other node (e.g. a network node). In the first case the serving access point may adjust mobility parameters based on this radio link failure information and optionally other reported radio link failure information. In the second case the other node may send a radio link failure report message to the serving access point or the other node may adjust mobility parameters based on this radio link failure information (and optionally other reported radio link failure information) and send the adjusted mobility parameters to the serving access point.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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| Declaration Date | Declaration Reference | Declaring Company | Specification Information | ||||||
| 4G | 17/09/2010 | ISLD-201010-017 | QUALCOMM INC |
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Specification Information
Specification Information
Technologies
Family Information
| All Granted Patents In Patent Family : | ---- |
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Resource configuration Mobility and handover
Product
Access point
Use Cases
Wireless communication
Services
Mobility Management
Claim
1. A method of communication, comprising:
receiving, at a first access point, an access request from an access terminal, wherein the access request includes an identifier of the access terminal and an identifier of a second access point, wherein the second access point is a source access point of a handover for the access terminal;
receiving, at the first access point, an indication from the access terminal that a radio link failure occurred during the handover of the access terminal from the second access point; and
sending a dedicated radio link failure message from the first access point to the second access point, wherein the dedicated radio link failure message comprises the indication that the radio link failure occurred during the handover from the second access point, and wherein the dedicated radio link failure message is used to adapt one or more mobility parameters relating to handover performance at the second access point.
2. The method of claim 1, wherein the first access point was prepared for handover of the access terminal.
3. The method of claim 1, wherein:
the first access point comprises a target access point for the handover.
4. The method of claim 1, wherein the access request comprises a connection re-establishment request.
5. The method of claim 1, wherein the dedicated radio link failure message further comprises at least one of the group consisting of: an identifier of the first access point, an identifier of the second access point, and the identifier of the access terminal.
6. The method of claim 1, wherein:
the first access point accepts the handover of the access terminal.
7. The method of claim 1, wherein the first access point rejects the handover of the access terminal.
8. The method of claim 1, wherein the dedicated radio link failure message comprises an indication of whether the first access point was prepared for handover of the access terminal.
9. The method of claim 1, further comprising collecting statistical information relating to handovers at the first access point, wherein the dedicated radio link failure message comprises the statistical information.
10. The method of claim 1, wherein the dedicated radio link failure message is sent at a time specified by a periodic reporting schedule.
11. The method of claim 1, wherein the dedicated radio link failure message is sent at a time specified by a reporting trigger.
12. The method of claim 1, wherein:
the first access point was not prepared for handover of the access terminal.
13. An apparatus for communication, comprising:
a receiver configured to receive, at a first access point, an access request from an access terminal, wherein the access request includes an identifier of the access terminal and an identifier of a second access point, wherein the second access point is a source access point of a handover for the access terminal;
a mobility controller configured to receive, at the first access point, an indication from the access terminal that a radio link failure occurred during the handover of the access terminal from the second access point; and
a communication controller configured to send a dedicated radio link failure message from the first access point to the second access point, wherein the dedicated radio link failure message comprises the indication that the radio link failure occurred during the handover from the second access point, and wherein the dedicated radio link failure message is used to adapt one or more mobility parameters relating to handover performance at the second access point.
14. The apparatus of claim 13, wherein the first access point was prepared for handover of the access terminal.
15. The apparatus of claim 13, wherein:
the first access point comprises a target access point for the handover.
16. The apparatus of claim 13, wherein the access request comprises a connection re-establishment request.
17. The apparatus of claim 13, wherein the dedicated radio link failure message further comprises at least one of the group consisting of: an identifier of the first access point, an identifier of the second access point, and the identifier of the access terminal.
18. The apparatus of claim 13, wherein:
the first access point accepts the handover of the access terminal.
19. The apparatus of claim 13, wherein the first access point rejects the handover of the access terminal.
20. The apparatus of claim 13, wherein the dedicated radio link failure message comprises an indication of whether the first access point was prepared for handover of the access terminal.
21. The apparatus of claim 13, wherein the mobility controller is further configured to collect statistical information relating to handovers at the first access point, wherein the dedicated radio link failure message comprises the statistical information.
22. The apparatus of claim 13, wherein the dedicated radio link failure message is sent at a time specified by a periodic reporting schedule.
23. The apparatus of claim 13, wherein the dedicated radio link failure message is sent at a time specified by a defined reporting trigger.
24. The apparatus of claim 13, wherein:
the first access point was not prepared for handover of the access terminal.
25. An apparatus for communication, comprising:
means for receiving, at a first access point, an access request from an access terminal, wherein the access request includes identifier of the access terminal and an identifier of a second access point, wherein the second access point is a source access point of a handover for the access terminal;
means for receiving, at the first access point, an indication from the access terminal that a radio link failure occurred during the handover of the access terminal from the second access point; and
means for sending a dedicated radio link failure message from the first access point to the second access point, wherein the dedicated radio link failure message comprises the indication that the radio link failure occurred during the handover from the second access point, and wherein the dedicated radio link failure message is used to adapt one or more mobility parameters relating to handover performance at the second access point.
26. The apparatus of claim 25, wherein the first access point was prepared for handover of the access terminal.
27. The apparatus of claim 25, wherein:
the first access point comprises a target access point for the handover.
28. The apparatus of claim 25, wherein the access request comprises a connection re-establishment request.
29. The apparatus of claim 25, wherein the dedicated radio link failure message further comprises at least one of the group consisting of: an identifier of the first access point, an identifier of the second access point, and the identifier of the access terminal.
30. The apparatus of claim 25, wherein:
the first access point accepts the handover of the access terminal.
31. The apparatus of claim 25, wherein the first access point rejects the handover of the access terminal.
32. The apparatus of claim 25, wherein the dedicated radio link failure message comprises an indication of whether the first access point was prepared for handover of the access terminal.
33. The apparatus of claim 25, further comprising means for collecting statistical information relating to handovers at the first access point, wherein the dedicated radio link failure message comprises the statistical information.
34. The apparatus of claim 25, wherein the dedicated radio link failure message is sent at a time specified by a periodic reporting schedule.
35. The apparatus of claim 25, wherein the dedicated radio link failure message is sent at a time specified by a defined reporting trigger.
36. The apparatus of claim 25, wherein:
the first access point was not prepared for handover of the access terminal.
37. A computer-program product, comprising:
a non-transitory computer-readable medium comprising code for causing a computer to:
receive, at a first access point, an access request from an access terminal, wherein the access request includes an identifier of the access terminal and an identifier of a second access point, wherein the second access point is a source access point of a handover for the access terminal;
receive, at the first access point, an indication from the access terminal that a radio link failure occurred during the handover of the access terminal from the second access point; and
send a dedicated radio link failure message from the first access point to the second access point, wherein the dedicated radio link failure message comprises the indication that the radio link failure occurred during the handover from the second access point, and wherein the dedicated radio link failure message is used to adapt one or more mobility parameters relating to handover performance at the second access point.
38. The computer-program product of claim 37, wherein the first access point was prepared for handover of the access terminal.
39. The computer-program product of claim 37, wherein:
the first access point comprises a target access point for the handover.
40. The computer-program product of claim 37, wherein the access request comprises a connection re-establishment request.
41. The computer-program product of claim 37, wherein:
the first access point accepts the handover of the access terminal.
42. The computer-program product of claim 37, wherein the dedicated radio link failure message comprises an indication of whether the first access point was prepared for handover of the access terminal.
43. The computer-program product of claim 37, wherein:
the computer-readable medium further comprises code for causing the computer to collect statistical information relating to handovers at the first access point; and
the dedicated radio link failure message comprises the statistical information.
44. The computer-program product of claim 37, wherein the dedicated radio link failure message is sent at a time specified by a periodic reporting schedule.
45. The computer-program product of claim 37, wherein the dedicated radio link failure message is sent at a time specified by a defined reporting trigger.
Associated Portfolios
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