Apparatus and method for making measurements in mobile telecommunications system user equipment
View Patent ↗A method and apparatus for selecting cells in a mobile telecommunications system, the system comprising a network of a plurality of cells of a Universal Mobile Telecommunications Systems (UMTS) and a network of a plurality of cells of a second Radio Access Technology (RAT), the method comprising, at a user equipment device: when in UMTS mode, flagging in a neighboring cell list stored on the user equipment device information for a cell of a second RAT which is known to be unsuitable for selection. Information from the neighboring cell list information for the flagged cell may be removed, in particular for a limited period of time.
1. A method of cell reselection by a user equipment device (UE), the UE operable with a first cellular Radio Access Technology (RAT) and a second cellular RAT, the method comprising:
when the UE is camped on a cell of the first RAT, determining whether a cell of a second RAT is suitable for camping,
the UE not considering said cell of the second RAT as a candidate for reselection if said cell of the second RAT is not suitable for camping, and further not considering said cell of the second RAT for a time period.
2. The method according to claim 1 , further comprising considering said cell of the second RAT as a candidate for reselection after expiry of the time period.
3. The method according to claim 1 , wherein not considering said cell of the second RAT comprises removing said cell from a list of neighboring cells.
4. The method according to claim 1 , wherein not considering said cell of the second RAT comprises flagging said cell in a list of neighboring cells as being unsuitable for camping.
5. The method according to claim 1 , wherein said cell of the second RAT is not suitable when it is barred.
6. The method according to claim 1 , wherein said cell of the second RAT is not suitable due to being part of a list of barred cells.
7. The method according to claim 1 , wherein said cell of the second RAT is not suitable due to being part of a list of unsuitable cells.
8. The method according to claim 1 , wherein said cell of the second RAT is not suitable due to belonging to a public land mobile network (PLMN) that is not the same as a PLMN selected by the UE.
9. The method according to claim 1 , wherein the time period is a maximum of 300 seconds.
10. The method according to claim 1 , wherein the time period is 300 seconds.
11. The method according to claim 1 , wherein the time period is a defined period of time.
12. The method according to claim 1 , wherein the time period is a limited period of time.
13. The method according to claim 1 , wherein the UE receives a list of neighboring cells including the cell of the second RAT.
14. The method of claim 1 , wherein the first RAT is selected from a group including UMTS, GSM, or CDMA; and the second RAT is different from the first RAT and selected from the group including UMTS, GSM, or CDMA.
15. The method of claim 1 , wherein the reselection is for camping.
16. The method of claim 1 , wherein determining whether a cell of a second RAT is suitable for camping comprises:
generating measurement data for cells in a neighboring cell list;
identifying from the measurement data a cell that meets a cell reselection criterion; and
determining whether the identified cell is suitable for camping when the identified cell is a cell of the second RAT.
17. A user equipment device (UE) configured to be operable with a first cellular Radio Access Technology (RAT) and a second cellular RAT, the UE comprising:
a processor and memory, the UE being operable so that, when the UE is camped on a cell of the first RAT, it is determined whether a cell of a second RAT is suitable for camping,
wherein the UE does not consider said cell of the second RAT as a candidate for reselection if said cell of the second RAT is not suitable for camping, and further does not consider said cell of the second RAT for a time period.
18. The UE according to claim 17 , further configured to consider said cell of the second RAT as a candidate for reselection after expiry of the time period.
19. The UE according to claim 17 , wherein, in order to not consider said cell of the second RAT, the UE is configured to remove said cell from a list of neighboring cells.
20. The UE according to claim 17 , wherein, in order to not consider said cell of the second RAT, the UE is arranged to flag said cell in a list of neighboring cells as being unsuitable for selection.
21. The UE according to claim 17 , wherein said cell of a second RAT is not suitable when it is barred.
22. The UE according to claim 17 , wherein said cell of a second RAT is not suitable due to being part of a list of barred cells.
23. The UE according to claim 17 , wherein said cell of a second RAT is not suitable due to being part of a list of unsuitable cells.
24. The UE according to claim 17 , wherein said cell of a second RAT is not suitable due to belonging to a public land mobile network (PLMN) that is not to the same as a PLMN selected by the UE.
25. The UE according to claim 17 , wherein the time period is a maximum of 300 seconds.
26. The UE according to claim 17 , wherein the time period is 300 seconds.
27. The UE according to claim 17 , wherein the time period is a defined period of time.
28. The UE according to claim 17 , further configured to receive a list of neighboring cells including the cell of the second RAT.
29. The UE of claim 17 , wherein the first RAT is selected from a group including UMTS, GSM, GPRS or CDMA; and the second RAT is different from the first RAT and selected from the group including UMTS, GSM, GPRS, or CDMA.
30. The UE of claim 17 , wherein the reselection is for camping.
31. The UE of claim 17 , further operable to:
generate measurement data for cells in a neighboring cell list;
identify from the measurement data a cell that meets a cell reselection criterion; and
determine whether the identified cell is suitable for camping when the identified cell is a cell of the second RAT.
32. A method of cell reselection by a user equipment device (UE), the UE operable with a first cellular Radio Access Technology (RAT) and a second cellular RAT, the method comprising:
when the UE is camped on a cell of the first RAT,
the UE considering a cell of a second RAT as barred as a candidate for reselection for a time period if said cell of the second RAT is not suitable for camping.
33. The method according to claim 32 , further comprising determining whether said cell of the second RAT is suitable for camping.
34. The method according to claim 32 , further comprising considering said cell of the second RAT as a candidate for reselection after expiry of the time period.
35. The method according to claim 32 , wherein considering said cell of the second RAT as barred comprises removing said cell from a list of neighboring cells.
36. The method according to claim 32 , wherein considering said cell of the second RAT as barred comprises flagging said cell in a list of neighboring cells as being unsuitable for camping.
37. The method according to claim 32 , wherein said cell of the second RAT is not suitable when it is barred.
38. The method according to claim 32 , wherein said cell of the second RAT is not suitable due to being part of a list of barred cells.
39. The method according to claim 32 , wherein said cell of the second RAT is not suitable due to being part of a list of unsuitable cells.
40. The method according to claim 32 , wherein said cell of the second RAT is not suitable due to belonging to a public land mobile network (PLMN) that is not the same as a PLMN selected by the UE.
41. The method according to claim 32 , wherein the time period is a maximum of 300 seconds.
42. The method according to claim 32 , wherein the time period is 300 seconds.
43. The method according to claim 32 , wherein the time period is a defined period of time.
44. The method according to claim 32 , wherein the time period is a limited period of time.
45. The method according to claim 32 , wherein the UE receives a list of neighboring cells including the cell of the second RAT.
46. The method of claim 32 , wherein the first RAT is selected from a group including UMTS, GSM, or CDMA; and the second RAT is different from the first RAT and selected from the group including UMTS, GSM, or CDMA.
47. The method of claim 32 , wherein the reselection is for camping.
48. The method of claim 32 , further comprising:
generating measurement data for the cells in a neighboring cell list;
identifying from the measurement data a cell that meets a cell reselection criterion; and
determining whether the identified cell is suitable for camping when the identified cell is a cell of the second RAT.
49. A user equipment device (UE) configured to be operable with a first cellular Radio Access Technology (RAT) and a second cellular RAT, the UE comprising:
a processor and memory, the UE being operable so that, when the UE is camped on a cell of the first RAT,
the UE considers a cell of a second RAT as barred as a candidate for reselection for a time period if said cell of the second RAT is not suitable for camping.
50. The UE according to claim 49 , wherein the UE is configured to determine whether said cell of the second RAT is suitable for camping.
51. The UE according to claim 49 , further configured to consider said cell of the second RAT as a candidate for reselection after expiry of the time period.
52. The UE according to claim 49 , wherein, in order to consider said cell of the second RAT as barred, the UE is configured to remove said cell from a list of neighboring cells.
53. The UE according to claim 49 , wherein, in order to consider said cell of the second RAT as barred, the UE is arranged to flag said cell in a list of neighboring cells as being unsuitable for camping.
54. The UE according to claim 49 , wherein said cell of the second RAT is not suitable when it is barred.
55. The UE according to claim 49 , wherein said cell of the second RAT is not suitable due to being part of a list of barred cells.
56. The UE according to claim 49 , wherein said cell of the second RAT is not suitable due to being part of a list of unsuitable cells.
57. The UE according to claim 49 , wherein said cell of the second RAT is not suitable due to belonging to a public land mobile network (PLMN) that is not the same as a PLMN selected by the UE.
58. The UE according to claim 49 , wherein the time period is a maximum of 300 seconds.
59. The UE according to claim 49 , wherein the time period is 300 seconds.
60. The UE according to claim 49 , wherein the time period is a defined period of time.
61. The UE according to claim 49 , wherein the time period is a limited period of time.
62. The UE according to claim 49 , further configured to receive a list of neighboring cells including the cell of the second RAT.
63. The UE of claim 49 , wherein the first RAT is selected from a group including UMTS, GSM, or CDMA; and the second RAT is different from the first RAT and selected from the group including UMTS, GSM, or CDMA.
64. The UE of claim 49 , wherein the reselection is for camping.
65. The UE of claim 49 , further operable to:
generate measurement data for the cells in a neighboring cell list;
identify from the measurement data a cell that meets a cell reselection criterion; and
determine whether the identified cell is suitable for camping when the identified cell is a cell of the second RAT.
66. A method of cell reselection by a user equipment device (UE), the UE operable with a first cellular Radio Access Technology (RAT) and a second cellular RAT, the method comprising:
when the UE is camped on a cell of the first RAT,
determining whether a cell of a second RAT is suitable for camping,
the UE excluding said cell of the second RAT as a candidate for reselection for a time period if said cell of the second RAT is not suitable for camping.
67. The method according to claim 66 , further comprising considering said cell of the second RAT as a candidate for reselection after expiry of the time period.
68. The method according to claim 66 , wherein excluding said cell of the second RAT comprises removing said cell from a list of neighboring cells.
69. The method according to claim 66 , wherein excluding said cell of the second RAT comprises flagging said cell in a list of neighboring cells as being unsuitable for camping.
70. The method according to claim 66 , wherein said cell of the second RAT is not suitable when it is barred.
71. The method according to claim 66 , wherein said cell of the second RAT is not suitable due to being part of a list of barred cells.
72. The method according to claim 66 , wherein said cell of the second RAT is not suitable due to being part of a list of unsuitable cells.
73. The method according to claim 66 , wherein said cell of the second RAT is not suitable due to belonging to a public land mobile network (PLMN) that is not the same as a PLMN selected by the UE.
74. The method according to claim 66 , wherein the time period is a maximum of 300 seconds.
75. The method according to claim 66 , wherein the time period is 300 seconds.
76. The method according to claim 66 , wherein the time period is a defined period of time.
77. The method according to claim 66 , wherein the time period is a limited period of time.
78. The method according to claim 66 , wherein the UE receives a list of neighboring cells including the cell of the second RAT.
79. The method of claim 66 , wherein the first RAT is selected from a group including UMTS, GSM, or CDMA; and the second RAT is different from the first RAT and selected from the group including UMTS, GSM, or CDMA.
80. The method of claim 66 , wherein the reselection is for camping.
81. The method of claim 66 , wherein determining whether a cell of a second RAT is suitable for camping comprises:
generating measurement data for cells in a neighboring cell list;
identifying from the measurement data a cell that meets a cell camping criterion; and
determining whether the identified cell is suitable for camping when the identified cell is a cell of the second RAT.
82. A user equipment device (UE) configured to be operable with a first cellular Radio Access Technology (RAT) and a second cellular RAT, the UE comprising:
a processor and memory, the UE being operable so that, when the UE is camped on a cell of the first RAT, it is determined whether a cell of a second RAT is suitable for camping,
wherein the UE excludes said cell of the second RAT as a candidate for reselection for a time period if said cell of the second RAT is not suitable for camping.
83. The UE according to claim 82 , further configured to consider said cell of the second RAT as a candidate for reselection after expiry of the time period.
84. The UE according to claim 82 , wherein, in order to exclude said cell of the second RAT, the UE is configured to remove said cell from a list of neighboring cells.
85. The UE according to claim 82 , wherein, in order to exclude said cell of the second RAT, the UE is arranged to flag said cell in a list of neighboring cells as being unsuitable for camping.
86. The UE according to claim 82 , wherein said cell of the second RAT is not suitable when it is barred.
87. The UE according to claim 82 , wherein said cell of the second RAT is not suitable due to being part of a list of barred cells.
88. The UE according to claim 82 , wherein said cell of the second RAT is not suitable due to being part of a list of unsuitable cells.
89. The UE according to claim 82 , wherein said cell of the second RAT is not suitable due to belonging to a public land mobile network (PLMN) that is not the same as a PLMN selected by the UE.
90. The UE according to claim 82 , wherein the time period is a maximum of 300 seconds.
91. The UE according to claim 82 , wherein the time period is 300 seconds.
92. The UE according to claim 82 , wherein the time period is a defined period of time.
93. The UE according to claim 82 , wherein the time period is a limited period of time.
94. The UE according to claim 82 , further configured to receive a list of neighboring cells including the cell of the second RAT.
95. The UE of claim 82 , wherein the first RAT is selected from a group including UMTS, GSM, or CDMA; and the second RAT is different from the first RAT and selected from the group including UMTS, GSM, or CDMA.
96. The UE of claim 82 , wherein the reselection is for camping.
97. The UE of claim 82 , further operable to:
generate measurement data for cells in a neighboring cell list;
identify from the measurement data a cell that meets a cell reselection criterion; and
determine whether the identified cell is suitable for camping when the identified cell is a cell of the second RAT.