Device authentication in a wireless telecommunications network
US-2024334189-A1 · Oct 3, 2024 · US
US8977264B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8977264-B2 |
| Application number | US-201213456496-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 26, 2012 |
| Priority date | Jul 15, 2011 |
| Publication date | Mar 10, 2015 |
| Grant date | Mar 10, 2015 |
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An apparatus and method for preventing performance degradation of a call service in a portable terminal are provided. In the apparatus, a memory stores a Preferred Roaming List (PRL) including information about a plurality of systems and an avoidance list including information about a system to which access has failed the predetermined number or more times, and when an access attempt to originate or terminate a call to or from a specific system acquired in a weak electrical field has failed a predetermined number or more times, a controller controls reacquisition of the specific system and attempting of call origination to or call termination from the reacquired specific system.
Opening claim text (preview).
What is claimed is: 1. A portable terminal comprising: a memory for storing a Preferred Roaming List (PRL) including information about at least one system; and a controller for acquiring a specific system from the PRL, attempting a call connection through the acquired specific system, determining whether a predetermined number of call connection failures through the acquired specific system has occurred, and repeating the acquiring, the attempting, and the determining until the…
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