Timing transitions between wireless communication systems
First Claim
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1. A method for transitioning between a first communications system and a second communications system, comprising:
- simulating a decrease in signal quality of a forward link while operating in the first communications system;
starting a first timer with a first time period and a second timer with a second time period, wherein the first timer and the second timer are associated with the first communications system;
transitioning to the second communications system;
performing one or more tasks associated with monitoring a paging channel of the second communications system; and
transitioning to an inactive state if the one or more tasks are not performed before the expiration of the combination of the first time period and the second time period.
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Abstract
Interoperability between wireless communication systems, such as the IS2000-1x and IS856 systems, is facilitated by using supervision timers. A wireless communication device starts one or more supervision timers and performs an intersystem transition. When the wireless communication device returns from the transition, the supervision timers are used to estimate the duration of the transition. The wireless communication device then performs a sequence of tasks appropriate to the estimated duration.
23 Citations
19 Claims
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1. A method for transitioning between a first communications system and a second communications system, comprising:
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simulating a decrease in signal quality of a forward link while operating in the first communications system; starting a first timer with a first time period and a second timer with a second time period, wherein the first timer and the second timer are associated with the first communications system; transitioning to the second communications system; performing one or more tasks associated with monitoring a paging channel of the second communications system; and transitioning to an inactive state if the one or more tasks are not performed before the expiration of the combination of the first time period and the second time period. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A wireless device for transitioning between a first communications system and a second communications system, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory, the instructions being executable to; simulate a decrease in signal quality of a forward link while operating in the first communications system; start a first timer with a first time period and a second timer with a second time period, wherein the first timer and the second timer are associated with the first communications system; transition to the second communications system; perform one or more tasks associated with monitoring a paging channel of the second communications system; and transition to an inactive state if the one or more tasks are not performed before the expiration of the combination of the first time period and the second time period. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. An apparatus for transitioning between a first communications system and a second communications system, comprising:
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means for simulating a decrease in signal quality of a forward link while operating in the first communications system; means for starting a first timer with a first time period and a second timer with a second time period, wherein the first timer and the second timer are associated with the first communications system; means for transitioning to the second communications system; means for performing one or more tasks associated with monitoring a paging channel of the second communications system; and means for transitioning to an inactive state if the one or more tasks are not performed before the expiration of the combination of the first time period and the second time period. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification