Method and apparatus for performing idle handoff in a multiple access communication system
First Claim
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1. An apparatus for performing idle handoff, comprising:
- means for measuring, at a mobile station in an idle state, received signal energies from a plurality of base stations;
means for compiling, at the mobile station, a first set of the base stations with received energies exceeding a predetermined threshold;
means for receiving a second set indicating the base stations with resources to provide communications to the mobile station; and
means for performing an idle handoff by the mobile station in an access state to a base station common to the first set and the second set.
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Abstract
A method and apparatus which permits handoffs while the mobile station is in the system access state. This is achieved by providing for channel assignment messages to be sent over the paging channel of a plurality of base stations, which increases the probability of one of the messages getting through. In addition, this assures the mobile station will be able handoff to a different base station and have a traffic channel allocated to it on the new base station without delay. In addition, a method and apparatus which permits the mobile station to be directly assigned into a soft handoff state upon traffic channel assignment.
51 Citations
19 Claims
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1. An apparatus for performing idle handoff, comprising:
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means for measuring, at a mobile station in an idle state, received signal energies from a plurality of base stations; means for compiling, at the mobile station, a first set of the base stations with received energies exceeding a predetermined threshold; means for receiving a second set indicating the base stations with resources to provide communications to the mobile station; and means for performing an idle handoff by the mobile station in an access state to a base station common to the first set and the second set. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for performing idle handoff, comprising:
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a searcher configured to measure received signal energies from a plurality of base stations; and a control processor configured to; compile a first set of the base stations with received energies exceeding a predetermined threshold; receive a second set indicating the base stations with resources to provide communications to the apparatus; and perform an idle handoff in an access state to a base station common to the first set and the second set. - View Dependent Claims (12, 13)
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14. A mobile station, comprising:
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an antenna configured to receive signals; a control processor configured to; compile a first set of the base stations with received energies exceeding a predetermined threshold; receive a second set indicating the base stations with resources to provide communications to the apparatus; and perform an idle handoff in an access state to a base station common to the first set and the second set. - View Dependent Claims (15, 16)
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17. A computer-readable medium storing a program for performing idle handoff which comprises computer readable instructions executable to:
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measure, at a mobile station in an idle state, received signal energies from a plurality of base stations; compile, at the mobile station, a first set of the base stations with received energies exceeding a predetermined threshold; receive a second set of the base stations with resources to provide communications to the mobile station; and perform an idle handoff by the mobile station in an access state to a base station common to the first set and the second set. - View Dependent Claims (18, 19)
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Specification