Method and apparatus for estimating initial time alignment in a cellular communications network
First Claim
1. A method in a cellular mobile radio system for initially setting a time alignment parameter in a mobile station comprising the steps of:
- estimating an optimal time alignment parameter before communication on a new traffic channel of a desired base station is established, for use during communication on the new traffic channel based on information relating to the position of the mobile station available before the communication on the new traffic channel is established;
sending the estimated time alignment parameter to the mobile station; and
setting the time alignment parameter in the mobile station in accordance with the estimated time alignment parameter.
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Accused Products
Abstract
A method and apparatus for use in a cellular mobile radio telephone system for initially setting a time alignment parameter in a mobile station. The method comprises the steps of estimating an optimal time alignment parameter for use during communication on a new traffic channel of a desired base station based on information available before the communication on the traffic channel is established, sending the estimated time alignment parameter to the mobile station, and setting the time alignment value in the mobile in accordance with the estimated time alignment parameter. An apparatus for initially setting a time alignment parameter is also provided according to a preferred embodiment.
47 Citations
16 Claims
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1. A method in a cellular mobile radio system for initially setting a time alignment parameter in a mobile station comprising the steps of:
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estimating an optimal time alignment parameter before communication on a new traffic channel of a desired base station is established, for use during communication on the new traffic channel based on information relating to the position of the mobile station available before the communication on the new traffic channel is established; sending the estimated time alignment parameter to the mobile station; and setting the time alignment parameter in the mobile station in accordance with the estimated time alignment parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method in a cellular mobile radio system for sending a time alignment value to a mobile station in a handoff order or physical layer control message, said method comprising the steps of:
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estimating an optimal time alignment parameter before communication on a new traffic channel of a desired base station is established, for use during communication on the new traffic channel based on information relating to the position of the mobile station available before the communication is established; and sending the estimated time alignment parameter to the mobile station in the handoff order or physical layer control message. - View Dependent Claims (11, 12, 13, 14)
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15. An apparatus in a cellular mobile radio system having a plurality of cells, for initially setting a time alignment parameter in a mobile station comprising:
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means for estimating an optimal time alignment parameter before communication on a new traffic channel of a desired cell is established, for use during communication on the new traffic channel based on information relating to the position of the mobile station available before the communication is established; means for sending the estimated time alignment parameter to the mobile station; and means for setting the time alignment parameter in the mobile station in accordance with the estimated time alignment parameter.
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16. An apparatus in a cellular mobile radio system for sending a time alignment value to a mobile station in a handoff order or physical layer control message, said apparatus comprising:
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means for estimating an optimal time alignment parameter before communication on a new traffic channel of a desired base station is established, for use during communication on the new traffic channel based on information relating to the position of the mobile station available before the communication is established; and means for sending the estimated time alignment parameter to the mobile station in the handoff order or physical layer control message.
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Specification