Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-09-26
1999-02-02
Urban, Edward F.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455524, 370331, H04Q 700
Patent
active
RE0360791
ABSTRACT:
The invention relates to a method in mobile radio systems in which the responsibility for transmitting message information to a mobile station is handed over from a first base station transmitter to a second base station transmitter. In this method, the same radio channel is used, if possible, before and after the handover for transmitting message information to the mobile station. If the same radio channel can be utilized, the handover takes place without the mobile station being informed beforehand of the handover by a special signal or order or the like. In digital mobile ratio systems with digital transmission of message information by digital modulation of the radio signals, the transmission is preferably started from a second base station transmitter before the transmission is terminated from a first base station transmitter. During a certain transmission time substantially the same message information is transmitted to the mobile station from both the first and second base station transmitters.
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Raith Alex K.
Uddenfeldt Jan E.
Telefonaktiebolaget LM Ericsson
Urban Edward F.
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