Paging channel control method and apparatus

H - Electricity – 04 – Q

Patent

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Details

H04Q 7/08 (2006.01) H04B 7/185 (2006.01) H04Q 7/38 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2222384

In a messaging system, message traffic is transmitted on one or more traffic channels T1, T2 and the allocation of groups S1, S2 of receivers to the traffic channels T1, T2 is controlled by information transmitted on a bulletin board channel BB. A predetermined number of frames before a change in the traffic channel allocation, a countdown value is transmitted in the relevant traffic channel T1 and the countdown value is decremented in each subsequent frame. Before the countdown value reaches zero, the groups of receivers S1, S2 retune to the bulletin board channel, receive their new channel allocations and retune to the traffic channel indicated for their group. The frame timings of the different traffic channels T1, T2, are staggered to reduce the peak power required to transmit message bursts in these channels.

Dans un système de messagerie, le trafic est transmis sur une ou plusieurs voies T1, T2 et l'affectation des groupes de récepteurs S1, S2 aux voies T1, T2 est contrôlée par les informations transmises sur une voie de babillard BB. Un nombre prédéterminé de blocs est choisi avant tout changement d'affectation dans les voies de trafic; le compte est transmis dans la voie de trafic T1 en cause et il est réduit d'une unité à chaque bloc ultérieur. Avant que le compte ne devienne nul, les groupes de récepteurs S1, S2 se resyntonisent sur la voie du babillard pour recevoir leurs nouvelles affectations de voies, puis se resyntonisent sur la voie de trafic indiquée pour chacun des groupes. La transmission des blocs est décalée dans les différentes voies de trafic T1, T2 afin de réduire la puissance de crête nécessaire pour y transmettre les salves de messages.

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