Telecommunications – Radiotelephone system – Message storage or retrieval
Patent
1997-06-26
1998-08-18
Eisenzopf, Reinhard J.
Telecommunications
Radiotelephone system
Message storage or retrieval
455 383, 455413, 455433, H04M 1110
Patent
active
057970947
ABSTRACT:
A cellular communications system including a mobile station that shifts periodically between a stand-by operating mode where communications are possible and a deep sleep operating mode wherein communications are impossible and battery power is conserved. Thus, while the mobile station is in deep sleep mode, message transmissions to the mobile station are impossible. The messages are, however, stored for later delivery, and a record of the stored, undelivered messages is maintained for future access. When the mobile station emerges from deep sleep, the maintained message record is checked, and the stored messages for the awakened mobile station are retrieved and delivered.
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Commonly assigned, copending U.S. Application for Patent Serial No. 08/231,000 filed Apr. 20, 1994 and entitled "Method of and Apparatus for a Deep-Sleep Mode in a Digital Cellular Communication System".
Boudreau Alain
Houde Michel
Tom Wayne
Turcotte Eric
Armstrong Darnell R.
Eisenzopf Reinhard J.
Telefonaktiebolaget L M Ericsson (publ)
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