Techniques for accessing a wireless communication system with tune-away capability
First Claim
1. An apparatus comprising:
- a controller configured to determine a protected time interval required after an access request is sent to a first communication system, wherein the first communication system is entitled to respond anytime within the protected time interval, to determine a starting time for sending the access request such that the protected time interval does not overlap a tune-away interval, and to initiate sending the access request to the first communication system at the starting time, wherein the controller is further configured to tune to a second communication system at least during the tune-away interval; and
a receiver for tuning to the first communication system during the protected time interval and to tune away from the first communication system to the second communication system at least during the tune-away interval.
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Abstract
To access a first communication system, a terminal determines a transmission time for an access probe, an expected response time from the system, and a protected time interval based on the transmission time and/or expected response time. The terminal determines a starting time for sending the access probe such that the protected time interval does not overlap a tune-away interval in which the terminal is to monitor anther frequency/air-interface. This starting time may be set initially to the end of a prior access probe plus a pseudo-random wait duration and may be advanced forward or moved backward in time, if needed, by a time duration selected such that the protected time interval does not overlap the tune-away interval.
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Citations
28 Claims
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1. An apparatus comprising:
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a controller configured to determine a protected time interval required after an access request is sent to a first communication system, wherein the first communication system is entitled to respond anytime within the protected time interval, to determine a starting time for sending the access request such that the protected time interval does not overlap a tune-away interval, and to initiate sending the access request to the first communication system at the starting time, wherein the controller is further configured to tune to a second communication system at least during the tune-away interval; and a receiver for tuning to the first communication system during the protected time interval and to tune away from the first communication system to the second communication system at least during the tune-away interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method comprising:
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determining a protected time interval required after an access request is sent to a first communication system, wherein the first communication system is entitled to respond anytime within the protected time interval, the protected time interval being a time interval in which a receiver is tuned to the first communication system; determining a starting time for sending the access request such that the protected time interval does not overlap a tune-away interval, the tune-away interval being a time interval in which the receiver is tuned away from the first communication system and tuned to a second communication system; and sending the access request to the first communication system at the starting time. - View Dependent Claims (13, 14, 15)
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16. An apparatus comprising:
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means for determining a protected time interval required after an access request is sent to a first communication system, wherein the first communication system is entitled to respond anytime within the protected time interval, the protected time interval being a time interval in which a receiver is tuned to the first communication system; means for determining a starting time for sending the access request such that the protected time interval does not overlap a tune-away interval, the tune-away interval being a time interval in which the receiver is tuned away from the first communication system and tuned to a second communication system; and means for sending the access request to the first communication system at the starting time. - View Dependent Claims (17, 18, 19)
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20. An article comprising a memory unit including machine-executable instructions to cause a processor in a wireless device to:
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determine a protected time interval required after an access request is sent to a first communication system, wherein the first communication system is entitled to respond anytime within the protected time interval, the protected time interval being a time interval in which a receiver is tuned to the first communication system; determine a starting time for sending the access request such that the protected time interval does not overlap a tune-away interval, the tune-away interval being a time interval in which the receiver is tuned away from the first communication system and tuned to a second communication system; and direct transmission of the access request to the first communication system at the starting time. - View Dependent Claims (21, 22, 23)
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24. A method of performing system access, comprising:
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determining a protected time interval required after an access request is sent to a data only communication system, wherein the data only communication system is entitled to respond anytime within the protected time interval, the protected time interval being a time interval in which a receiver is tuned to the data only system; determining a starting access channel cycle for sending the access request such that the protected time interval does not overlap a tune-away interval, the tune-away interval being a time interval in which the receiver is tuned to a data and voice communication system; and sending the access request to the data only system at the starting access channel cycle, wherein the data and voice communication system can respond within the protected time interval even during the tune-away interval if overlapping. - View Dependent Claims (25, 26, 27, 28)
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Specification