RESOLVING NODE IDENTIFIER CONFUSION

• US 20090132674A1
• Filed: 11/12/2008
• Published: 05/21/2009
• Est. Priority Date: 11/16/2007
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Agashe, Parag A., Flore, Oronzo, Tenny, Nathan E., Prakash, Rajat, Gupta, Rajarshi, Kitazoe, Masato, Horn, Gavin B.
• Application Number:
  US12/269,666
• Publication Number:
  US 20090132674A1
• Time in Patent Office: Days
• US Class Current: 709/207
• CPC Class Codes: H04W 36/0061 of neighbour cell information
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

Confusion resulting from assigning the same node identifier to multiple nodes is resolved through the use of confusion detection techniques and the use of unique identifiers for the nodes. In some aspects an access point and/or an access terminal may perform operations relating to detecting confusion and/or providing a unique identifier to resolve confusion.

Claims

1. A method of communication, comprising:

receiving a first message for a first node identified by a first node identifier;

determining whether a second node is identified by the first node identifier; and

sending, as a result of the determination, a second message specifying use of a second node identifier to establish communication with the first node.

2. The method of claim 1, wherein:

the first node identifier comprises a specified cell identifier of a first type; and

the determination of whether the second node is identified by the first node identifier comprises determining whether a plurality of cells use the specified cell identifier.

3. The method of claim 2, wherein the second message comprises a request for a cell identifier of a second type associated with the specified cell identifier.

4. The method of claim 2, wherein:

the first message comprises a first indication of receive signal strength of a first signal from a first one of the cells that use the specified cell identifier;

the method further comprises determining whether cell identifier confusion may occur based on the first indication of receive signal strength and a second indication of receive signal strength of a second signal from a second one of the cells that use the specified cell identifier; and

the sending of the second message is further based on the determination of whether the cell identifier confusion may occur.

5. The method of claim 2, further comprising:

sending a defined set of cell identifiers of a first type to a third node that sent the message;

sending a threshold associated with the defined set of cell identifiers to the third node, wherein the threshold is for determining whether to acquire a cell identifier of a second type;

6. The method of claim 1, wherein the second node identifier uniquely identifies the first node.

7. The method of claim 1, wherein the first message comprises a handover request, interference management signaling, a signal strength measurement report, or a message for reserving at least one resource.

8. The method of claim 1, wherein the determination comprises:

conducting neighbor discovery;

or

determining whether the first identifier is found in a list of identifiers.

9. The method of claim 1, wherein:

the first message comprises an indication of the first node identifier; and

the determination comprising comparing the indication with a list of node identifier indications.

10. The method of claim 1, wherein:

the first node identifier comprises a physical cell identifier, a pilot identifier, or a pseudorandom number sequence; and

the second node identifier comprises a cell global identifier, an access network identifier, or a sector identifier.

11. An apparatus for communication, comprising:

a receiver configured to receive a first message for a first node identified by a first node identifier;

a confusion detector configured to determine whether a second node is identified by the first node identifier; and

an identifier controller configured to send, as a result of the determination, a second message specifying use of a second node identifier to establish communication with the first node.

12. The apparatus of claim 11, wherein:

the first node identifier comprises a specified cell identifier of a first type; and

the determination of whether the second node is identified by the first node identifier comprises determining whether a plurality of cells use the specified cell identifier.

13. The apparatus of claim 12, wherein the second message comprises a request for a cell identifier of a second type associated with the specified cell identifier.

14. The apparatus of claim 12, wherein:

the first message comprises a first indication of receive signal strength of a first signal from a first one of the cells that use the specified cell identifier;

the confusion detector is further configured to determine whether cell identifier confusion may occur based on the first indication of receive signal strength and a second indication of receive signal strength of a second signal from a second one of the cells that use the specified cell identifier; and

the sending of the second message is further based on the determination of whether the cell identifier confusion may occur.

15. The apparatus of claim 12, further comprising a transmitter configured to:

send a defined set of cell identifiers of a first type to a third node that sent the message;

send a threshold associated with the defined set of cell identifiers to the third node, wherein the threshold is for determining whether to acquire a cell identifier of a second type;

16. The apparatus of claim 11, wherein the second node identifier uniquely identifies the first node.

17. The apparatus of claim 11, wherein the first message comprises a handover request, interference management signaling, a signal strength measurement report, or a message for reserving at least one resource.

18. The apparatus of claim 11, wherein the determination comprises:

conducting neighbor discovery;

or

determining whether the first identifier is found in a list of identifiers.

19. The apparatus of claim 11, wherein:

the first message comprises an indication of the first node identifier; and

the determination comprising comparing the indication with a list of node identifier indications.

20. The apparatus of claim 11, wherein:

the first node identifier comprises a physical cell identifier, a pilot identifier, or a pseudorandom number sequence; and

the second node identifier comprises a cell global identifier, an access network identifier, or a sector identifier.

21. An apparatus for communication, comprising:

means for receiving a first message for a first node identified by a first node identifier;

means for determining whether a second node is identified by the first node identifier; and

means for sending, as a result of the determination, a second message specifying use of a second node identifier to establish communication with the first node.

22. The apparatus of claim 21, wherein:

the first node identifier comprises a specified cell identifier of a first type; and

the determination of whether the second node is identified by the first node identifier comprises determining whether a plurality of cells use the specified cell identifier.

23. The apparatus of claim 22, wherein the second message comprises a request for a cell identifier of a second type associated with the specified cell identifier.

24. The apparatus of claim 22, wherein:

the first message comprises a first indication of receive signal strength of a first signal from a first one of the cells that use the specified cell identifier;

the means for determining is configured to determine whether cell identifier confusion may occur based on the first indication of receive signal strength and a second indication of receive signal strength of a second signal from a second one of the cells that use the specified cell identifier; and

the sending of the second message is further based on the determination of whether the cell identifier confusion may occur.

25. The apparatus of claim 22, further comprising:

means for sending a defined set of cell identifiers of a first type to a third node that sent the message;

means for sending a threshold associated with the defined set of cell identifiers to the third node, wherein the threshold is for determining whether to acquire a cell identifier of a second type;

26. The apparatus of claim 21, wherein the second node identifier uniquely identifies the first node.

27. The apparatus of claim 21, wherein the first message comprises a handover request, interference management signaling, a signal strength measurement report, or a message for reserving at least one resource.

28. The apparatus of claim 21, wherein the determination comprises:

conducting neighbor discovery;

or

determining whether the first identifier is found in a list of identifiers.

29. The apparatus of claim 21, wherein:

the first message comprises an indication of the first node identifier; and

the determination comprising comparing the indication with a list of node identifier indications.

30. The apparatus of claim 21, wherein:

the first node identifier comprises a physical cell identifier, a pilot identifier, or a pseudorandom number sequence; and

the second node identifier comprises a cell global identifier, an access network identifier, or a sector identifier.

31. A computer-program product, comprising:

computer-readable medium comprising codes for causing a computer to;

receive a first message for a first node identified by a first node identifier;

determine whether a second node is identified by the first node identifier; and

send, as a result of the determination, a second message specifying use of a second node identifier to establish communication with the first node.

32. The computer-program product of claim 31, wherein:

the first node identifier comprises a specified cell identifier of a first type; and

the determination of whether the second node is identified by the first node identifier comprises determining whether a plurality of cells use the specified cell identifier.

33. The computer-program product of claim 32, wherein the second message comprises a request for a cell identifier of a second type associated with the specified cell identifier.

34. The computer-program product of claim 32, wherein:

the first message comprises a first indication of receive signal strength of a first signal from a first one of the cells that use the specified cell identifier;

the computer-readable medium further comprises codes for causing the computer to determine whether cell identifier confusion may occur based on the first indication of receive signal strength and a second indication of receive signal strength of a second signal from a second one of the cells that use the specified cell identifier; and

the sending of the second message is further based on the determination of whether the cell identifier confusion may occur.

35. The computer-program product of claim 32, wherein the computer-readable medium further comprises codes for causing the computer to:

send a defined set of cell identifiers of a first type to a third node that sent the message;

send a threshold associated with the defined set of cell identifiers to the third node, wherein the threshold is for determining whether to acquire a cell identifier of a second type;

36. A method of communication, comprising:

sending a defined set of cell identifiers of a first type to a node;

sending a threshold associated with the defined set of cell identifiers to the node, wherein the threshold is for determining whether to acquire cell identifiers of a second type; and

receiving a message from the node comprising one of the cell identifiers of the second type.

37. The method of claim 36, wherein:

the cell identifiers of the first type comprise physical cell identifiers; and

the cell identifiers of the second type comprise global cell identifiers.

38. The method of claim 36, wherein:

the defined set comprises a subset of all cell identifiers of the first type; and

the defined set identifies a cell identifier that may be assigned to multiple cells within a coverage area of another cell.

39. The method of claim 36, further comprising defining the defined set of cell identifiers by identifying a plurality of neighbor cells that use a common cell identifier of the first type.

40. The method of claim 36, further comprising defining the threshold.

41. An apparatus for communication, comprising:

an identifier controller configured to send a defined set of cell identifiers of a first type to a node;

a threshold controller configured to send a threshold associated with the defined set of cell identifiers to the node, wherein the threshold is for determining whether to acquire cell identifiers of a second type; and

a receiver configured to receive a message from the node comprising one of the cell identifiers of the second type.

42. The apparatus of claim 41, wherein:

the cell identifiers of the first type comprise physical cell identifiers; and

the cell identifiers of the second type comprise global cell identifiers.

43. The apparatus of claim 41, wherein:

the defined set comprises a subset of all cell identifiers of the first type; and

the defined set identifies a cell identifier that may be assigned to multiple cells within a coverage area of another cell.

44. The apparatus of claim 41, wherein the identifier controller is further configured to define the defined set of cell identifiers by identifying a plurality of neighbor cells that use a common cell identifier of the first type.

45. The apparatus of claim 41, further comprising a threshold controller configured to define the threshold.

46. An apparatus for communication, comprising:

means for sending a defined set of cell identifiers of a first type to a node;

means for sending a threshold associated with the defined set of cell identifiers to the node, wherein the threshold is for determining whether to acquire cell identifiers of a second type; and

means for receiving a message from the node comprising one of the cell identifiers of the second type.

47. The apparatus of claim 46, wherein:

the cell identifiers of the first type comprise physical cell identifiers; and

the cell identifiers of the second type comprise global cell identifiers.

48. The apparatus of claim 46, wherein:

the defined set comprises a subset of all cell identifiers of the first type; and

the defined set identifies a cell identifier that may be assigned to multiple cells within a coverage area of another cell.

49. The apparatus of claim 46, further comprising means for defining the defined set of cell identifiers by identifying a plurality of neighbor cells that use a common cell identifier of the first type.

50. The apparatus of claim 46, further comprising means for defining the threshold.

51. A computer-program product, comprising:

computer-readable medium comprising codes for causing a computer to;

send a defined set of cell identifiers of a first type to a node;

send a threshold associated with the defined set of cell identifiers to the node, wherein the threshold is for determining whether to acquire cell identifiers of a second type; and

receive a message from the node comprising one of the cell identifiers of the second type.

52. The computer-program product of claim 51, wherein:

the cell identifiers of the first type comprise physical cell identifiers; and

the cell identifiers of the second type comprise global cell identifiers.

53. A method of communication, comprising:

determining whether a plurality of cells use identical cell identifiers; and

sending a measurement report based on the determination.

54. The method of claim 53, further comprising receiving a request for confusion information, wherein the measurement report:

is sent in response to the request; and

comprises an indication of the determination.

55. The method of claim 53, wherein the measurement report comprises a plurality of entries for the identical cell identifiers.

56. The method of claim 53, wherein the cells comprise cells from which synchronization signals or pilot signals are:

currently being received;

received during a defined period of time;

or

received during a period of time associated with a defined number of handovers.

57. The method of claim 53, wherein:

the identical cell identifiers are cell identifiers of a first type;

the method further comprises determining cell identifiers of a second type associated with the identical cell identifiers; and

the measurement report further comprises the cell identifiers of the second type.

58. The method of claim 57, wherein:

the cell identifiers of the first type comprise physical cell identifiers; and

the cell identifiers of the second type comprise global cell identifiers.

59. An apparatus for communication, comprising:

a confusion detector configured to determine whether a plurality of cells use identical cell identifiers; and

a measurement report generator configured to send a measurement report based on the determination.

60. The apparatus of claim 59, further comprising a receiver configured to receive a request for confusion information, wherein the measurement report:

is sent in response to the request; and

comprises an indication of the determination.

61. The apparatus of claim 59, wherein the measurement report comprises a plurality of entries for the identical cell identifiers.

62. The apparatus of claim 59, wherein the cells comprise cells from which synchronization signals or pilot signals are:

currently being received;

received during a defined period of time;

or

received during a period of time associated with a defined number of handovers.

63. The apparatus of claim 59, wherein:

the identical cell identifiers are cell identifiers of a first type;

the apparatus further comprises an identifier controller configured to determine cell identifiers of a second type associated with the identical cell identifiers; and

the measurement report further comprises the cell identifiers of the second type.

64. The apparatus of claim 63, wherein:

the cell identifiers of the first type comprise physical cell identifiers; and

the cell identifiers of the second type comprise global cell identifiers.

65. An apparatus for communication, comprising:

means for determining whether a plurality of cells use identical cell identifiers; and

means for sending a measurement report based on the determination.

66. The apparatus of claim 65, further means for receiving a request for confusion information, wherein the measurement report:

is sent in response to the request; and

comprises an indication of the determination.

67. The apparatus of claim 65, wherein the measurement report comprises a plurality of entries for the identical cell identifiers.

68. The apparatus of claim 65, wherein the cells comprise cells from which synchronization signals or pilot signals are:

currently being received;

received during a defined period of time;

or

received during a period of time associated with a defined number of handovers.

69. The apparatus of claim 65, wherein:

the identical cell identifiers are cell identifiers of a first type;

the apparatus further comprises means for determining cell identifiers of a second type associated with the identical cell identifiers; and

the measurement report further comprises the cell identifiers of the second type.

70. The apparatus of claim 69, wherein:

the cell identifiers of the first type comprise physical cell identifiers; and

the cell identifiers of the second type comprise global cell identifiers.

71. A computer-program product, comprising:

computer-readable medium comprising codes for causing a computer to;

determine whether a plurality of cells use identical cell identifiers; and

send a measurement report based on the determination.

72. The computer-program product of claim 71, wherein:

the computer-readable medium further comprises codes for causing the computer to receive a request for confusion information; and

wherein the measurement report;

is sent in response to the request; and

comprises an indication of the determination.

73. The computer-program product of claim 71, wherein the measurement report comprises a plurality of entries for the identical cell identifiers.