Frame to frame timing sychronization system and method

H - Electricity – 04 – J

Patent

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H04J 3/02 (2006.01) H04B 7/212 (2006.01) H04B 7/26 (2006.01) H04J 3/06 (2006.01) H04J 3/16 (2006.01) H04L 7/04 (2006.01) H04L 12/28 (2006.01) H04L 12/56 (2006.01) H04L 29/06 (2006.01) H04N 7/173 (2006.01) H04Q 7/20 (2006.01) H04Q 7/24 (2006.01) H04Q 7/36 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2437467

A system and method for communicating in a time division multiplie access (301) communication system operating with a repeating frame format, which after a signal from a first subscriber is acquired in a first frame, reacquires signals from the first subscriber in subsequent frames without relying on timing information contained within the signal in the subsequent frame. The system and method comminicates within frames of information that includes a predetermined number of airlink timing units (ATU) (323) and time slots that include an integer number of ATUs (332), where the ATU (332) duration is the minimum of the system. The ATU (332) is defined as the time interval required to transmit a predetermined number of symbols. Since the time to transmit a symbol depends on the baud rate, the absolute time interval for an ATU (332) also changes with changes in baud rate.

L'invention concerne un système et un procédé destinés à communiquer dans un système de communication d'accès multiple par répartition dans le temps (301) fonctionnant avec un format de trame répété qui, après un signal provenant du premier abonné est acquis dans la première trame, et réacquiert des signaux provenant du premier abonné dans des trames subséquentes sans se fonder sur les informations de synchronisation contenues dans le signal de la trame subséquente. Le système et le procédé de l'invention communiquent à l'intérieur des trames d'informations comportant un nombre prédéterminé d'unités de synchronisation à liaison aérienne (ATU) (332) et des créneaux de temps comportant un nombre entier d'ATU (332), la durée d'ATU (332) étant la granularité minimum du système. L'ATU (332) est définit comme l'intervalle de temps nécessaire à la transmission d'un nombre prédéterminé de symboles. Etant donné que le temps de transmission d'un symbole dépend du débit en bauds, l'intervalle de temps absolu pour une ATU (332) change avec le débit en bauds.

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