Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1996-10-30
1999-03-16
Wolfe, Willis R.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455422, 455433, 455458, 455432, H04M 1100, H04Q 700
Patent
active
058841806
ABSTRACT:
A method is disclosed for alerting a mobile subscriber within a radio telecommunication system to wait for the connection of an incoming call which may have a delayed connection time due to network congestion or the implementation of flexible alerting features utilizing alert-and-answer-before-routing techniques. In flexible alerting extension phone service, each one of a plurality of mobile stations is assigned to a single pilot directory number (PDN), and a home location register (HLR) in an originating exchange maintains a list of parameters identifying each visited mobile switching center (V-MSC) in which mobile stations identified with the PDN are believed to be currently located. The HLR places a forward service indicator code in the routing request messages that it sends to the V-MSCs. After all mobile stations identified with the PDN are paged, voice channels are seized with those that responded. Alerting signals are sent to responding mobile stations, and the V-MSCs transmit a delayed connection message to the answering mobile stations. While the V-MSCs return routing numbers to the HLR, the message may be repeated periodically. If more than one routing number is returned to the HLR, the HLR selects a single mobile station to receive the call. The delayed connection announcement is stopped when a voice trunk is established between the originating MSC and the V-MSC serving the selected mobile station.
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Smith Steven W.
Telefonaktiebolaget LM Ericsson (publ)
Vo Hieu T.
Wolfe Willis R.
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