System and method for geographically locating a cellular phone
First Claim
1. A method of geographically locating a cellular phone, the method comprising:
- determining that a handover of the cellular phone from a first cell to a second cell has occurred;
determining a geographical area in which the handover from the first cell to the second cell occurred by;
modeling at least a portion of a cell reception area of the first cell and the second cell;
defining a handover area comprising overlapping portions of the first and second cell areas; and
concluding that when the handover occurred the cellular phone was located in the handover area;
wherein modeling the at least a portion of the cell reception area of the first cell and the second cell comprises using a pre-defined shape as an initial model of at least a portion of the cell reception area of at least one of the first cell and the second cell.
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Abstract
According to an embodiment of the invention, there is disclosed a method for geographically locating a cellular phone. The method comprises: determining an effective cell-area for each of a first cell and a second cell in a cellular network; and determining a handover area within which the cellular phone is likely to be located when control of the cellular phone is transferred from the first cell to the second cell; wherein the determination of the handover area and the effective cell-area for each of the first cell and the second cell are made based on a topological relationship between the first cell and the second cell. Further related apparatus embodiments are also disclosed.
117 Citations
20 Claims
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1. A method of geographically locating a cellular phone, the method comprising:
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determining that a handover of the cellular phone from a first cell to a second cell has occurred; determining a geographical area in which the handover from the first cell to the second cell occurred by; modeling at least a portion of a cell reception area of the first cell and the second cell; defining a handover area comprising overlapping portions of the first and second cell areas; and concluding that when the handover occurred the cellular phone was located in the handover area; wherein modeling the at least a portion of the cell reception area of the first cell and the second cell comprises using a pre-defined shape as an initial model of at least a portion of the cell reception area of at least one of the first cell and the second cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for geographically locating a cellular phone, the apparatus comprising:
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means for determining that a handover of the cellular phone from a first cell to a second cell has occurred; means for determining a geographical area in which the handover from the first cell to the second cell occurred, wherein the means for determining the area comprises; an effective cell-area module for modeling at least a portion of a cell reception area of the first cell and the second cell; a handover area module for defining a handover area comprising overlapping portions of the first and second cell areas; and means for concluding that when that the handover occurred the cellular phone was located in the handover area; wherein the effective cell-area module comprises means for modeling the at least a portion of the cell reception area of the first cell and the second cell using a pre-defined shape as an initial model of at least a portion of the cell reception area of at least one of the first cell and the second cell. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification