Method and apparatus for performing handoff in communication systems
First Claim
Patent Images
1. A subscriber station, comprising:
- means for selecting a base station for transmission of forward link data;
means for determining whether a reverse link signal is being reliably received by the base station;
means for selecting an alternative base station for the transmission of the forward link data if the reverse link signal is not being reliably received by the base station; and
means for sending a message indicating the alternative base station for handoff and a requested transmission data rate for the alternative base station if the reverse link signal is not being reliably received by the base station.
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Abstract
A communication system including a closed loop power control system. Prior to allowing a handoff to a new base station, the subscriber station verifies that its reverse link signal is being received by the destination base station with sufficient energy. The determination is made based on the received reverse link power control commands from the base station. Moreover, a handoff may be forced when the base station providing the best forward link signal in not receiving the reverse link signal from the subscriber station with sufficient energy.
70 Citations
20 Claims
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1. A subscriber station, comprising:
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means for selecting a base station for transmission of forward link data; means for determining whether a reverse link signal is being reliably received by the base station; means for selecting an alternative base station for the transmission of the forward link data if the reverse link signal is not being reliably received by the base station; and means for sending a message indicating the alternative base station for handoff and a requested transmission data rate for the alternative base station if the reverse link signal is not being reliably received by the base station. - View Dependent Claims (2, 3, 4, 5)
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6. A subscriber station, comprising:
circuitry configured to select a base station for transmission of forward link data, to determine whether a reverse link signal is being reliably received by the base station, to select an alternative base station for the transmission of the forward link data if the reverse link signal is not being reliably received by the base station, and to send a message indicating the alternative base station for handoff and a requested transmission data rate for the alternative base station if the reverse link signal is not being reliably received by the base station. - View Dependent Claims (7, 8, 9, 10)
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11. A method for communications by a subscriber station, comprising:
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selecting a base station for transmission of forward link data; determining whether a reverse link signal is being reliably received by the base station; selecting an alternative base station for the transmission of the forward link data if the reverse link signal is not being reliably received by the base station; and sending a message indicating the alternative base station for handoff and a requested transmission data rate for the alternative base station if the reverse link signal is not being reliably received by the base station. - View Dependent Claims (12, 13, 14, 15)
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16. A non-transitory computer-program product for communicating messages, the computer-program product including a computer-readable medium encoded with computer-readable instructions for:
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selecting a base station for transmission of forward link data; determining whether a reverse link signal is being reliably received by the base station; selecting an alternative base station for the transmission of the forward link data if the reverse link signal is not being reliably received by the base station; and sending a message indicating the alternative base station for handoff and a requested transmission data rate for the alternative base station if the reverse link signal is not being reliably received by the base station. - View Dependent Claims (17, 18, 19, 20)
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Specification