Mobile terminal mode control in high data rate CDMA system
First Claim
1. A communication network, comprising:
- a serving base station serving a mobile terminal, said base station including a forward link inactivity timer to monitor packet data transmissions to said mobile terminal on a forward link channel and to generate a first inactivity signal after a predetermined period of inactivity following the last packet data transmission to said mobile terminal on said forward link channel;
a reverse link inactivity timer to monitor transmissions received from said mobile terminal on a reverse link channel and generate a second inactivity signal when a predetermined period of time has elapsed since the last transmission from said mobile terminal was received on said reverse link channel; and
a base station controller responsive to said first and second inactivity signals to control an operational state of the mobile terminal.
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Abstract
Mobile terminals in a high data rate CDMA system may be placed in a control hold mode wherein reverse link control channels are gated, or transmitted at a reduced duty cycle. Mode decisions are based on the activity of the mobile terminal in both the forward and reverse links. A forward link inactivity timer is maintained at the base station that schedules forward link communications to a mobile terminal. The reverse link inactivity timer may be maintained at the same base station, at a different base station in the mobile terminal'"'"'s active set, or at the base station controller. The forward link inactivity timer may follow the mobile terminal'"'"'s selection of best forward link serving base station in handoff. When both the forward and reverse link inactivity timers have expired, and no forward link data is pending, the mobile terminal may be commanded to a control hold mode.
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Citations
18 Claims
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1. A communication network, comprising:
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a serving base station serving a mobile terminal, said base station including a forward link inactivity timer to monitor packet data transmissions to said mobile terminal on a forward link channel and to generate a first inactivity signal after a predetermined period of inactivity following the last packet data transmission to said mobile terminal on said forward link channel;
a reverse link inactivity timer to monitor transmissions received from said mobile terminal on a reverse link channel and generate a second inactivity signal when a predetermined period of time has elapsed since the last transmission from said mobile terminal was received on said reverse link channel; and
a base station controller responsive to said first and second inactivity signals to control an operational state of the mobile terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of controlling the operational state of a mobile terminal, said method comprising:
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monitoring forward link transmission on a forward link channel at a serving base station serving the mobile terminal;
generating a first inactivity signal at the serving base station after a predetermined period of inactivity has elapsed since the last packet data transmission to said mobile terminal on said forward link channel;
monitoring transmissions received from said mobile terminal on a reverse link channel;
generating a second inactivity signal when a predetermined period of time has elapsed since the last packet data transmission from said mobile terminal was received on said reverse link channel; and
controlling the operational state of the mobile terminal by the base station controller responsive to the first and second inactivity signals. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification