Data packet alignment in a communication system

H - Electricity – 04 – J

Patent

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Details

H04J 3/06 (2006.01) H04B 1/69 (2006.01) H04Q 7/22 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2096728

A communication system provides data packet timing alignment to facilitate soft handoff. A vocoder (315) transmits compressed voice frames to base-stations (130, 131) along links (110, 112) of variable length, ~L. The ~L translates to a delay ~t in the air-frames to be transmitted by the base-stations (130, 131). To compensate for the time delay ~t, the communication system advances both sets of air-frames to be transmitted by base-stations (130, 131) by at least ~t so that skipping of frames, relative to an air-frame reference (300), during transmission does not occur.

L'invention est un système de communication qui utilise un alignement temporel des paquets de données pour faciliter la réalisation d'un transfert sans heurt. Un vocodeur (315) transmet des blocs de données vocales comprimés à des stations de base (130, 131) via des liaisons (110, 112) de longueur variable ~L. Cette longueur variable correspond à un temps ~t dans les blocs à transmettre par les stations de base (130,131). Pour compenser ce retard ~t, le système de communication de l'invention avance d'un temps au moins égal à ~t les deux blocs à transmettre par les stations de base (130, 131), de sorte qu'il n'y a pas d'omission de blocs par rapport à un dispositif de référence (300) durant la transmission.

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