System and method for locating a cellular service
First Claim
Patent Images
1. A method, comprising:
- reading a first system identification number (“
SID”
) broadcast in a first frequency band, the first SID identifying a cellular service provider;
determining whether the first SID matches a SID stored in a dynamically updated SID table, the SID in the table identifying a cellular service provider that supports an application that exchanges remote access application message (RAAM) data packets with a radio frequency (RF) module via cellular control channels;
switching to a second frequency band and reading a second SID broadcast in the second frequency band if the first SID does not match a SID stored in the SID table, wherein support for the application is identified if the first or second SID matches a SID stored in the SID table;
determining whether support for the application needs to be detected quickly if neither the first nor the second SID is identified in the SID table;
performing a first process to detect support for the application if support needs to be detected quickly; and
performing a second process to detect support for the application if support does not need to be detected quickly.
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Abstract
A method for determining whether a particular service is provided by a cellular service provider comprising: listening for a page which includes a particular number plan area code (“NPA”) in a first frequency block; if the page is not heard in the first frequency block within a specified time period, listening for a page in a second frequency block which includes the particular NPA; and determining that the service is provided in the frequency block in which the page is sensed.
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Citations
14 Claims
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1. A method, comprising:
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reading a first system identification number (“
SID”
) broadcast in a first frequency band, the first SID identifying a cellular service provider;determining whether the first SID matches a SID stored in a dynamically updated SID table, the SID in the table identifying a cellular service provider that supports an application that exchanges remote access application message (RAAM) data packets with a radio frequency (RF) module via cellular control channels; switching to a second frequency band and reading a second SID broadcast in the second frequency band if the first SID does not match a SID stored in the SID table, wherein support for the application is identified if the first or second SID matches a SID stored in the SID table; determining whether support for the application needs to be detected quickly if neither the first nor the second SID is identified in the SID table; performing a first process to detect support for the application if support needs to be detected quickly; and performing a second process to detect support for the application if support does not need to be detected quickly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An article of manufacture comprising a machine accessible medium including content that when accessed by a machine causes the machine to:
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read a first system identification number (“
SID”
) broadcast in a first frequency band, the first SID identifying a cellular service provider;determine whether the first SID matches a SID stored in a dynamically updated SID table, the SID in the table identifying a cellular service provider that supports an application that exchanges remote access application message (RAAM) data packets with a radio frequency (RF) module via cellular control channels; switch to a second frequency band and read a second SID broadcast in the second frequency band if the first SID does not match a SID stored in the SID table, wherein support for the application is identified if the SID in the first or second frequency bands matches a SID stored in the SID table; determine whether support for the application needs to be detected quickly if neither the first nor the second SID is identified in the SID table; perform a first process to detect support for the application if support needs to be detected quickly; and perform a second process to detect support for the application if support does not need to be detected quickly. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification