Method and system for using a wireless signal received via a repeater for location determination
First Claim
1. A method for mobile station location determination, said method comprising:
- obtaining a measured power level and a measured phase of a wireless signal received by a mobile station;
calculating an expected received power level for said wireless signal based on said measured phase;
comparing said expected received power level to said measured power level to determine that said mobile station received said wireless signal via a repeater;
obtaining at least one location-determination parameter associated with said repeater; and
determining a location of said mobile station using said at least one location-determination parameter.
6 Assignments
0 Petitions
Accused Products
Abstract
A base station almanac (BSA) includes entries for a plurality of repeaters. An entry for a repeater includes location-determination parameters associated with that repeater, such as (i) a repeater forward link calibration (FLC) value that correct for transmission delay associated with the repeater and (ii) a center point of the repeater'"'"'s coverage area. A measured power level and a measured phase of a wireless signal transmitted by a base transceiver station (BTS) and received by the mobile station are obtained. An expected received power level is calculated based on the measured phase and the transmit power level of the BTS. If the measured power level exceeds the expected received power level by at least a predetermined amount, then it is determined that the mobile station received the wireless signal via a repeater and one or more location-determination parameters associated with the repeater are used to determine the mobile station'"'"'s location.
52 Citations
15 Claims
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1. A method for mobile station location determination, said method comprising:
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obtaining a measured power level and a measured phase of a wireless signal received by a mobile station; calculating an expected received power level for said wireless signal based on said measured phase; comparing said expected received power level to said measured power level to determine that said mobile station received said wireless signal via a repeater; obtaining at least one location-determination parameter associated with said repeater; and determining a location of said mobile station using said at least one location-determination parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for mobile station location determination, said system comprising:
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data storage storing location-determination information, wherein said location-determination information includes location-determination parameters for a plurality of repeaters; and a location engine for determining locations of mobile stations using said location-determination information, said location engine being configured to (i) calculate an expected received power level of a wireless signal based on a measured phase of said wireless signal reported by a mobile station and (ii) compare said expected received power level to a measured power level reported by said mobile station to determine whether said mobile station received said wireless signal via one of said repeaters. - View Dependent Claims (13, 14, 15)
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Specification