Improvements relating to handover in a digital cordless...

H - Electricity – 04 – Q

Patent

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H04Q 7/38 (2006.01)

Patent

CA 2157048

In a digital time-division duplex telecommunications system two or more base units (1) are capable of capable with any one of a plurality of portable units forming a cordless telephone system. Each of the base units (1) includes a transceiver (13) for transmitting signals and receiving coded speech signals from any one of the portable units and synchronisation means including a switch S1 and a receive bit counter (24) for synchronising each of the base units (1) with the MUX1 transmissions (i.e. the coded speech signals) from a portable unit so that handover of communication with one of the portable units from a first base unit, presently in communication with the portable unit, to a further base unit can be performed without substantial interruption of the reception and transmission of coded speech signals between the portable unit and the base units.

Dans un système de télécommunications duplex à répartition dans le temps, deux ou plusieurs unités de base (1) peuvent communiquer avec n'importe quelle unité parmi plusieurs unités mobiles constituant un système téléphonique sans fil. Chacune de ces unités de base (1) comprend un émetteur-récepteur (13) pour transmettre des signaux et recevoir des signaux de parole codés depuis n'importe laquelle des unités mobiles et un dispositif de synchronisation comportant un commutateur S1 et un compteur de bits reçus (24) pour synchroniser chacune des unités de base (1) avec les transmissions MUX1 (à savoir les signaux de parole codés) depuis une unité mobile, de sorte que la transmission de la communication avec une des unités mobiles depuis une première unité de base, en communication avec l'unité mobile, vers une autre unité de base, puisse être effectuée sans interruption substantielle de la réception et de la transmission des signaux de parole codés entre l'unité mobile et les unités de base.

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