Method and apparatus for mobile station location within a communication system
First Claim
Patent Images
1. A method for mobile station location within a communication system, the method comprising the steps of:
- communicating with a plurality of base stations via a first frequency band using a first spreading code, the first spreading code defining a first channel utilized for transmitting data from the mobile station to the plurality of base stations;
communicating with the plurality of base stations via the first frequency band using a second spreading code, the second spreading code defining a second channel utilized for transmitting control information from the mobile station to the plurality of base stations; and
communicating with the plurality of base stations via the first frequency band using a third spreading code, the third spreading code defining a third channel utilized for transmitting information to the plurality of base stations that is utilized for mobile station location within the communication system.
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Abstract
A Dedicated Physical Location Channel (DPLCH) is utilized by a mobile station (913) to support subscriber location functions. The DPLCH is spread by an Orthogonal Variable Spreading Factor (OVSF) code CL (502) of length 256 which is distinct from those OVSF codes assigned to other channels utilized by the mobile station (913). When a power-up function (PUF) is received by the mobile station (913), the DPLCH sub-channel amplitude is then modified relative to the other channels being utilized by the mobile station (913) using gain module GL (503) prior to combination (504) with the other channels.
88 Citations
17 Claims
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1. A method for mobile station location within a communication system, the method comprising the steps of:
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communicating with a plurality of base stations via a first frequency band using a first spreading code, the first spreading code defining a first channel utilized for transmitting data from the mobile station to the plurality of base stations; communicating with the plurality of base stations via the first frequency band using a second spreading code, the second spreading code defining a second channel utilized for transmitting control information from the mobile station to the plurality of base stations; and communicating with the plurality of base stations via the first frequency band using a third spreading code, the third spreading code defining a third channel utilized for transmitting information to the plurality of base stations that is utilized for mobile station location within the communication system. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for mobile station location within a communication system, the method comprising the steps of:
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communicating with a plurality of base stations via a first frequency band using a first spreading code, the first spreading code defining a first channel utilized for transmitting data from the mobile station to the plurality of base stations; communicating with the plurality of base stations via the first frequency band using a second spreading code, the second spreading code defining a second channel utilized for transmitting control information from the mobile station to the plurality of base stations; communicating with the plurality of base stations via the first frequency band using a third spreading code, the third spreading code defining a third channel utilized for transmitting information to the plurality of base stations that is utilized for mobile station location within the communication system; receiving a power-up function command; and adjusting the power of only the third channel in response to the received power-up function command. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for mobile station location within a communication system, the method comprising the steps of:
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receiving, via a first frequency band, a first spreading code, the first spreading code defining a first channel utilized for transmitting data from the mobile station to a base station; receiving, via the first frequency band, a second spreading code, the second spreading code defining a second channel utilized for transmitting control information from the mobile station to the base station; receiving, via the first frequency band, a third spreading code, the third spreading code defining a third channel utilized for transmitting information to the base station that is utilized for mobile station location within the communication system; transmitting a power-up function command; and receiving via the first frequency band, the third spreading code at an increased power while continuing to receive the first and the second spreading codes at substantially the same power level. - View Dependent Claims (14, 15, 16)
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17. An apparatus used for mobile station location within a communication system, the apparatus comprising:
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first channel circuitry for communicating with a plurality of base stations via a first frequency band using a first spreading code, the first spreading code defining a first channel utilized for transmitting data from the mobile station to the plurality of base stations; second channel circuitry for communicating with the plurality of base stations via the first frequency band using a second spreading code, the second spreading code defining a second channel utilized for transmitting control information from the mobile station to the plurality of base stations; and third channel circuitry for communicating with the plurality of base stations via the first frequency band using a third spreading code, the third spreading code defining a third channel utilized for transmitting information to the plurality of base stations that is utilized for mobile station location within the communication system.
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Specification