Enhanced higher priority public land mobile network (HPPLMN) search
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United States of America Patent
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Jun 21, 2016
Grant Date -
Jun 5, 2014
app pub date -
Dec 5, 2012
filing date -
Dec 5, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
Embodiments provide an enhanced approach for Higher Priority Public Land Mobile Network (HPPLMN) search. In one embodiment, information acquired during a search (for each detected cell per frequency channel) is saved in a database and persisted in the database based on a validity time. An idle mode-to-connected mode transition by the UE, rather than aborting the search, only suspends the search for it to be resumed at a later time upon a connected mode-to-idle mode transition by the UE. Saved search data that is valid at the time of the transition is maintained and the frequency channel(s) associated with it is not re-searched in the current search. In an embodiment, the search is resumed based on weights that are associated with frequency channels, where a weight indicates a priority for visiting the frequency channel.
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