Multiplex communications – Wide area network – Packet switching
Patent
1993-08-06
1995-07-25
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
375296, 455 23, H04J 316
Patent
active
054369045
ABSTRACT:
The present mobile communication system includes a base station (BAS) and at least one mobile subscriber station (MOB) having a modulator (COM, SPM, DPEM, QPSKM, KSM) able to modulate a carrier wave with a request for access signal, and a transmitter (A3, DCM, ANTM) to transmit the thus obtained modulated carrier wave to the base station (BAS) during a time slot of a time division multiple access structure (TDS). The modulator is a linear digital modulator (COM, SPM, DPEM, QPSKM, KSM) which, prior to modulating the carrier wave with the request for access signal, modulates a pre-access carrier wave in such a way that a substantially constant envelope output signal is obtained during a subslot (SS1/SS6) of a time slot (SI). In a further embodiment the mobile subscriber stations are arranged in groups, to which distinct groups of time slots of said time division multiple access structure (TDS) are assigned, and each of the mobile subscriber stations (MOB) is allowed to launch a request for access in a time slot of the assigned group only.
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Pequet Eric M. L. M.
Raes Serge C. C.
ALCATEL N.V.
Olms Douglas W.
Ton Dang
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