Method for deep paging
First Claim
Patent Images
1. A method for compensating for the Doppler effect in a communication system where messages are transmitted at a low data rate to a user terminal that is inside a building, comprising the steps of:
- acquiring a pilot signal prior to the user terminal entering the building;
placing the user terminal into a deep paging mode prior to the user terminal entering the building;
tracking Doppler as the user terminal proceeds into the building; and
monitoring an auxiliary paging channel after activating said deep paging mode.
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Abstract
A method for compensating for the Doppler effect in a communication system where messages are transmitted at a low data rate to a user terminal that is inside a building. The method comprising acquiring a pilot signal prior to the user terminal entering the building; placing the user terminal into a deep paging mode prior to the user terminal entering the building; tracking Doppler as the user terminal proceeds into the building; and monitoring an auxiliary paging channel after activating said deep paging mode.
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Citations
24 Claims
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1. A method for compensating for the Doppler effect in a communication system where messages are transmitted at a low data rate to a user terminal that is inside a building, comprising the steps of:
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acquiring a pilot signal prior to the user terminal entering the building; placing the user terminal into a deep paging mode prior to the user terminal entering the building; tracking Doppler as the user terminal proceeds into the building; and monitoring an auxiliary paging channel after activating said deep paging mode. - View Dependent Claims (2, 3, 4, 5, 9)
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6. A method for compensating for the Doppler effect in a communication system where messages are transmitted at a low data rate to a user terminal that is inside a building, comprising the steps of:
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receiving at the user terminal ephemeris messages transmitted from a gateway;
storing in the user terminal said ephemeris messages;determining the location of the user terminal; determining Doppler based on said location and said ephemeris messages stored in the user terminal; and acquiring a pilot signal. - View Dependent Claims (7, 8, 10)
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11. At least one processor configured for compensating for the Doppler effect in a communication system where messages are transmitted at a low data rate to a user terminal that is inside a building, comprising:
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a first module for acquiring a pilot signal prior to the user terminal entering the building; a second module for placing the user terminal into a deep paging mode prior to the user terminal entering the building; a third module for tracking Doppler as the user terminal proceeds into the building; and a fourth module for monitoring an auxiliary paging channel after activating the deep paging mode.
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12. An apparatus for compensating for the Doppler effect in a communication system where messages are transmitted at a low data rate to a user terminal that is inside a building, comprising:
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means for acquiring a pilot signal prior to the user terminal entering the building; means for placing the user terminal into a deep paging mode prior to the user terminal entering the building; means for tracking Doppler as the user terminal proceeds into the building; and means for monitoring an auxiliary paging channel after activating the deep paging mode.
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13. A user terminal for compensating for the Doppler effect in a communication system, comprising:
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at least one receiver operable to acquire messages, transmitted at a low data rate, inside a building, wherein the at least one receiver is further operable to acquire a pilot signal prior to the user terminal entering the building; a control processor in communication with the at least one receiver; and baseband circuitry in communication with the at least one receiver and operable by the control processor to place the user terminal into a deep paging mode prior to the user terminal entering the building, wherein the baseband circuitry is further operable to track Doppler as the user terminal proceeds into the building, and wherein the baseband circuitry is further operable to monitor an auxiliary paging channel after activating the deep paging mode. - View Dependent Claims (14, 15, 16, 17, 18)
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19. At least one processor configured for compensating for the Doppler effect in a communication system where messages are transmitted at a low data rate to a user terminal that is inside a building, comprising:
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a first module for receiving at the user terminal ephemeris messages transmitted from a gateway;
storing in the user terminal the ephemeris messages;a second module for determining the location of the user terminal; a third module for determining Doppler based on the location and the ephemeris messages stored in the user terminal; and a fourth module for acquiring a pilot signal.
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20. An apparatus configured for compensating for the Doppler effect in a communication system where messages are transmitted at a low data rate to a user terminal that is inside a building, comprising:
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means for receiving at the user terminal ephemeris messages transmitted from a gateway;
storing in the user terminal the ephemeris messages;means for determining the location of the user terminal; means for determining Doppler based on the location and the ephemeris messages stored in the user terminal; and means for acquiring a pilot signal.
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21. A user terminal for compensating for the Doppler effect in a communication system, comprising:
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at least one receiver operable to acquire messages, transmitted at a low data rate, inside a building, the at least one receiver further operable to acquire ephemeris messages transmitted from a gateway; a memory in communication with the at least one receiver and operable to store the ephemeris messages; a control processor in communication with the at least one receiver and the memory; baseband circuitry in communication with the at least one receiver and the memory and operable by the control processor to determine the location of the user terminal, wherein the baseband circuitry is further operable to determine Doppler based on the location and the ephemeris messages, and wherein the baseband circuitry and the at least one receiver are further operable to acquire a pilot signal. - View Dependent Claims (22, 23, 24)
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Specification