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.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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| Declaration Date | Declaration Reference | Declaring Company | Specification Information | ||||||
| 4G | 17/12/2010 | ISLD-201101-011 | QUALCOMM INC | Yes | Basis Patent | ||||
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Specification Information
Specification Information
Technologies
Family Information
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Mobility and handover
Product
Use Cases
Wireless communication
Services
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.
2. The method of claim 1, wherein the abort condition occurs when an indication of an impending handoff from the first access network to the second access network is obtained and the access terminal lacks a valid pre-registration with the second access network.
3. The method of claim 1, wherein the timer has a fixed duration so as to extend the time between pre-registration attempts by the access terminal.
4. The method of claim 1, wherein the timer is a hysteresis timer.
5. The method of claim 1 further comprising:
determining that the first access network allows pre-registration with the second access network.
6. The method of claim 1, further comprising:
receiving a pre-registration indicator and a first pre-registration zone identifier from a serving first access point of the first access network.
7. The method of claim 6, wherein the pre-registration indicator determines whether the first access network allows pre-registration with the second access network.
8. The method of claim 6, wherein the access terminal stores the received first pre-registration zone associated with the first access point.
9. The method of claim 6, further comprising:
receiving a secondary pre-registration zone list associated with the first pre-registration zone.
10. The method of claim 6, wherein as the access terminal moves from the first serving access point to a second serving access point within the first access network, the method further comprising:
obtaining a second pre-registration zone for the second serving access point; comparing the second pre-registration zone to the first pre-registration zone; and preventing a new pre-registration if the first pre-registration zone and the second pre-registration zone are the same.
11. The method of claim 10, further comprising:
obtaining a secondary pre-registration zone list for the second serving access point; comparing the first pre-registration zone to one or more zones in the secondary preregistration zone list; and
preventing a new pre-registration if the first pre-registration zone is found in the secondary pre-registration zone list.
12. The method of claim 11, further comprising:
performing a new pre-registration with the second access network via the second serving access point of the first access network if the first pre-registration zone is distinct from the second pre-registration zone and the zones in the secondary pre-registration zone list.
13. The method of claim 1, wherein the first access network and second access network are distinct wireless networks.
14. The method of claim 13, wherein the first access network is a Long Term Evolution network and the second access network is an Evolved High Rate Packet Data network.
15. The method of claim 1, wherein pre-registration includes exchanging one or more messages with the second access network through a communication tunnel via the first access network.
16. The method of claim 1, wherein pre-registration of the access terminal with the second access network permits a subsequent communication handoff between the first access network and the second access network without delay.
17. An access terminal, comprising:
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.
18. The access terminal of claim 17, wherein the wireless communication interface communicates with just one of the first access network and the second access network at any one time.
19. The access terminal of claim 17, wherein the processing circuit is further adapted to
obtain a first pre-registration zone identifier from a serving first access point of the first access network, wherein the first pre-registration zone identifier is associated with a plurality of access points in the first access network; and
obtain a secondary pre-registration zone list associated with the first pre-registration zone.
20. The access terminal of claim 19, wherein as the access terminal moves from the first serving access point to a second serving access point within the first access network, the processing circuit is further adapted to
obtain a second pre-registration zone for the second serving access point;
compare the second pre-registration zone to the first pre-registration zone; and prevent a new pre-registration if the first pre-registration zone and the second preregistration zone are the same.
21. The access terminal of claim 20, wherein the processing circuit is further adapted to
obtain a secondary pre-registration zone list for the second serving access point; compare the first pre-registration zone to one or more zones in the secondary preregistration zone list; and
prevent a new pre-registration if the first pre-registration zone is found in the secondary pre-registration zone list.
22. An access terminal, comprising:
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.
23. A computer-program product comprising a non-transitory computer-readable medium having instructions thereon, the instructions comprising:
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.
24. The method of claim 2, wherein the indication of an impending handoff is obtained based on an application being started that is only available on the second access network.
Associated Portfolios
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.