Optimized Limited Service Acquisition in a Multiple Subscription Device
First Claim
1. A method for accessing wireless wide area network communication with multiple subscriptions for an emergency call, comprising:
- accessing on user equipment a first subscription for registering on a first radio access technology and a second subscription for registering on a second radio access technology;
determining whether the user equipment is camping on the first radio access technology for full or limited service;
determining whether the user equipment is camping on the second radio access technology for full or limited service;
scanning via a first transceiver for at least limited service for the first radio access technology in response to determining that the user equipment is not camping on the second radio access technology; and
using the second radio access technology for any emergency call in response to determining that the user equipment is camping on the second radio access technology.
2 Assignments
0 Petitions
Accused Products
Abstract
Mobile devices, such as a dual standby global phone, can have multiple subscriptions to access different radio access technologies, such as Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA) technologies. A selective scanning utility recognizes that emergency calls can be processed in any active subscription rather than being independently invoked to obtain a plurality of ways to make an emergency call. The utility limits service acquisition to just one of all active subscriptions in device, thereby achieving the objective of staying camped for limited service without needing to perform cell selection on emergency call origination on a secondary subscription at the cost of battery service. For single-radio devices, this solution also increases the availability of the first selected cell by avoiding the need to tune away for cell selection on the secondary subscription.
28 Citations
35 Claims
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1. A method for accessing wireless wide area network communication with multiple subscriptions for an emergency call, comprising:
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accessing on user equipment a first subscription for registering on a first radio access technology and a second subscription for registering on a second radio access technology; determining whether the user equipment is camping on the first radio access technology for full or limited service; determining whether the user equipment is camping on the second radio access technology for full or limited service; scanning via a first transceiver for at least limited service for the first radio access technology in response to determining that the user equipment is not camping on the second radio access technology; and using the second radio access technology for any emergency call in response to determining that the user equipment is camping on the second radio access technology. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. At least one processor for accessing wireless wide area network communication with multiple subscriptions for an emergency call, comprising:
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a first module for accessing on user equipment a first subscription for registering on a first radio access technology and a second subscription for registering on a second radio access technology; a second module for determining whether the user equipment is camping on the first radio access technology for full or limited service; a third module for determining whether the user equipment is camping on the second radio access technology for full or limited service; a fourth module for scanning via a first transceiver for at least limited service for the first radio access technology in response to determining that the user equipment is not camping on the second radio access technology; and a fifth module for using the second radio access technology for any emergency call in response to determining that the user equipment is camping on the second radio access technology. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A computer program product for accessing wireless wide area network communication with multiple subscriptions for an emergency call, comprising:
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a non-transitory computer-readable medium storing sets of code comprising; a first set of code for causing a computer to access on user equipment a first subscription for registering on a first radio access technology and a second subscription for registering on a second radio access technology; a second set of code for causing the computer to determine whether the user equipment is camping on the first radio access technology for full or limited service; a third set of code for causing the computer to determine whether the user equipment is camping on the second radio access technology for full or limited service; a fourth set of code for causing the computer to scan via a first transceiver for at least limited service for the first radio access technology in response to determining that the user equipment is not camping on the second radio access technology; and a fifth set of code for causing the computer to use the second radio access technology for any emergency call in response to determining that the user equipment is camping on the second radio access technology. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. An apparatus for accessing wireless wide area network communication with multiple subscriptions for an emergency call, comprising:
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means for accessing on user equipment a first subscription for registering on a first radio access technology and a second subscription for registering on a second radio access technology; means for determining whether the user equipment is camping on the first radio access technology for full or limited service; means for determining whether the user equipment is camping on the second radio access technology for full or limited service; means for scanning via a first transceiver for at least limited service for the first radio access technology in response to determining that the user equipment is not camping on the second radio access technology; and means for using the second radio access technology for any emergency call in response to determining that the user equipment is camping on the second radio access technology. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. An apparatus for accessing wireless wide area network communication with multiple subscriptions for an emergency call, comprising:
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a computing platform for accessing on user equipment a first subscription for registering on a first radio access technology and a second subscription for registering on a second radio access technology; the computing platform further for determining whether the user equipment is camping on the first radio access technology for full or limited service; the computing platform further for determining whether the user equipment is camping on the second radio access technology for full or limited service; a first transceiver for scanning for at least limited service for the first radio access technology in response to the computing platform determining that the user equipment is not camping on the second radio access technology; and the computing platform further for using the second radio access technology for any emergency call in response to determining that the user equipment is camping on the second radio access technology. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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Specification