Method and apparatus for reducing successive pre-registration attempts by access terminals
First Claim
1. A method operational in an access terminal, comprising:
- starting a timer on the access terminal after a pre-registration with a second access network is performed by the access terminal via a first access network;
preventing additional pre-registrations with the second access network before a duration of the timer has expired unless an abort condition occurs, wherein the abort condition terminates the timer before the duration of the timer has expired, and wherein the abort condition occurs when a serving cell signal quality falls below a signal quality threshold; and
performing a second pre-registration before the duration of the timer has expired if the abort condition has occurred.
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Accused Products
Abstract
An access terminal pre-registers with a second access network via a first access network to ensure a quick handover in the future. Frequent pre-registration attempts are avoided by implementing a hysteresis timer that restricts when a pre-registration process can be initiated. The hysteresis timer is started when pre-registration is initiated by the access terminal. No new pre-registration attempts are permitted if the hysteresis timer has not expired. An abort condition can cause the hysteresis timer to be aborted early, and a new pre-registration can be initiated. Access points in the first access network may be grouped into one or more pre-registration zones. If the access terminal moves from a first access point to a second access point, a new pre-registration is skipped if the first and second access points have the same pre-registration zone or the second access point is aware of the pre-registration zone for the first access point.
24 Citations
24 Claims
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1. A method operational in an access terminal, comprising:
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starting a timer on the access terminal after a pre-registration with a second access network is performed by the access terminal via a first access network; preventing additional pre-registrations with the second access network before a duration of the timer has expired unless an abort condition occurs, wherein the abort condition terminates the timer before the duration of the timer has expired, and wherein the abort condition occurs when a serving cell signal quality falls below a signal quality threshold; and performing a second pre-registration before the duration of the timer has expired if the abort condition has occurred. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 24)
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17. An access terminal, comprising:
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a wireless communication interface having multi-mode capabilities to communicate over a first access network and a second access network; a processing circuit coupled to the wireless communication interface, the processing circuit adapted to; start a timer after a pre-registration with the second access network is performed by the access terminal via the first access network; prevent additional pre-registrations with the second access network before a duration of the timer has expired unless an abort condition occurs, wherein the abort condition terminates the timer before the duration of the timer has expired, and wherein the abort condition occurs when a serving cell signal quality falls below a signal quality threshold; and perform a second pre-registration before the duration of the timer has expired if the abort condition occurs. - View Dependent Claims (18, 19, 20, 21)
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22. An access terminal, comprising:
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means for starting a timer after a pre-registration with a second access network is performed by the access terminal via a first access network; means for preventing additional pre-registrations with the second access network before a duration of the timer has expired unless an abort condition occurs, wherein the abort condition terminates the timer before the duration of the timer has expired, and wherein the abort condition occurs when a serving cell signal quality falls below a signal quality threshold; and means for performing a second pre-registration before the duration of the timer has expired if the abort condition has occurred.
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23. A computer-program product comprising a non-transitory computer-readable medium having instructions thereon, the instructions comprising:
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code for starting a timer on an access terminal after a pre-registration with a second access network is performed by an access terminal via a first access network; code for preventing additional pre-registrations with the second access network before a duration of the timer has expired unless an abort condition occurs, wherein the abort condition terminates the timer before the duration of the timer has expired, and wherein the abort condition occurs when a serving cell signal quality falls below a signal quality threshold; and code for performing a second pre-registration before the duration of the timer has expired if the abort condition has occurred.
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Specification