Mobile communication system with position detection to facilitate hard handoff
First Claim
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1. A base station controller for facilitating hard handoff comprising:
- a position database configured to store information corresponding to locations of a plurality of handoff regions comprising at least one handoff region selected from the group consisting of intersystem handoff regions and intrasystem handoff regions; and
a selector bank subsystem configured to initiate tracking of the position location of a mobile unit upon detection of a pilot signal corresponding to a region near a handoff region of the plurality of handoff regions, without regard to pilot signal strength, to track the location of the mobile unit using at least partially a GPS system, to determine when the mobile unit enters the handoff region according to the stored information and the location of the mobile unit, and to initiate handoff when the mobile unit enters the handoff region.
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Abstract
A system for facilitating handoff adapted for use with a telecommunications network. The system includes position equipment for determining the location of a mobile transceiver within a region containing a first cell and a second cell. A comparison circuit compares the location with a predetermined handoff area within the region and provides a control signal in response thereto. A handoff initiation circuit initiates handoff of the mobile transceiver between the first cell and the second cell in response to the control signal. In a specific embodiment, the handoff is a hard handoff. The handoff region can be either intersystem or intrasystem.
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Citations
19 Claims
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1. A base station controller for facilitating hard handoff comprising:
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a position database configured to store information corresponding to locations of a plurality of handoff regions comprising at least one handoff region selected from the group consisting of intersystem handoff regions and intrasystem handoff regions; and a selector bank subsystem configured to initiate tracking of the position location of a mobile unit upon detection of a pilot signal corresponding to a region near a handoff region of the plurality of handoff regions, without regard to pilot signal strength, to track the location of the mobile unit using at least partially a GPS system, to determine when the mobile unit enters the handoff region according to the stored information and the location of the mobile unit, and to initiate handoff when the mobile unit enters the handoff region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of handoff comprising:
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initiating tracking of the position location of a mobile unit upon detection of a pilot signal corresponding to a region near a handoff region selected from the group consisting of intersystem handoff regions and intrasystem handoff regions, without regard to pilot signal strength; tracking the location of the mobile unit using at least partially a GPS system; determining when the mobile unit enters the handoff region according to stored information and the location of the mobile unit; and initiating handoff when the mobile unit has entered the handoff region. - View Dependent Claims (11, 12, 13, 14)
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15. An apparatus comprising:
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means for initiating tracking of the position location of a mobile unit upon detection of a pilot signal corresponding to a region near a handoff region selected from the group consisting of intersystem handoff regions and intrasystem handoff regions, without regard to pilot signal strength; means for tracking the location of the mobile unit using at least partially a GPS system; means for determining when the mobile unit enters the handoff region according to stored information and the location of the mobile unit; and means for initiating handoff when the mobile unit has entered the handoff region. - View Dependent Claims (16, 17, 18, 19)
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Specification