Telecommunications – Radiotelephone system – Special service
Reexamination Certificate
2006-03-14
2006-03-14
Cumming, William D. (Department: 2683)
Telecommunications
Radiotelephone system
Special service
C455S416000, C455S450000, C455S465000, C455S517000, C455S555000, C379S084000, C379S209010, C379S210010, C379S266050, C370S215000
Reexamination Certificate
active
07013129
ABSTRACT:
Apparatus and a method for establishing a cellular mobile call. If no radio traffic (voice or data) channels are available for a calling Mobile Station (MS), then a test is made to determine the expected wait time before a channel becomes available. If the expected wait time is less than a first threshold, then the call request is queued. If a channel does not become available before a second time threshold, then the caller is notified that the call has been queued and is expected to be established in a short time. A control message is sent to the MS to trigger an indication of the queued status to the user. The indication may be one or more tones, a data display, or the playing of a pre-recorded announcement. If the expected wait time is more than the first threshold, the caller is given the opportunity to be called back when a radio channel becomes available. Advantageously, the number of failed calls because of unavailable traffic channels is reduced, and the caller's annoyance level is reduced.
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Goss Stephen C.
Light Jeffrey Ross
Liu Chung-Zin
Salvador Omar Hernando
Shah Gitesh P.
Cumming William D.
Lucent Technologies - Inc.
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