Method and system for reducing synchronization time in a...

Details Method and system for reducing synchronization time in a... Method and system for reducing synchronization time in a...

H - Electricity

04

W

H04W 56/00 (2009.01) H04W 76/02 (2009.01) H04J 3/06 (2006.01) H04J 13/00 (2006.01)

Patent

CA 2364962

A method and system for generating forward link channels in a synchronous CDMA base station having a pilot pseudonoise (PN) sequence with a pilot PN sequence offset. In one embodiment, the method includes the steps of generating a sync channel (302) including a sync channel message; generating an identification channel including at least the pilot PN sequence offset; and orthogonalizing the sync channel and the identification channel. The identification channel and the sync channel are both transmitted. However, the mobile station may get the pilot PN offset from the identification channel quickly, rather than having to demodulate the entire sync channel message. The identification channel may further include an indication of the phase of the pilot PN sequence, and the epoch of the pilot PN sequence. In one embodiment, the method includes encoding the identification channel using a Golay code.

L'invention concerne un procédé et un système de génération de canaux de liaison aval dans une station de base synchrone AMRC ayant une séquence pilote de bruit pseudoaléatoire (PN) avec un décalage de séquence pilote de bruit pseudoaléatoire. Dans un mode de réalisation, le procédé consiste à générer un canal de synchronisation (302) comprenant un message du canal de synchronisation, à générer un canal d'identification comprenant au moins le décalage de séquence pilote de bruit pseudoaléatoire, et à orthogonaliser le canal de synchronisation et le canal d'identification. Ces canaux sont tous deux émis. La station mobile peut cependant recevoir rapidement du canal d'identification le décalage pilote de PN, plutôt que d'avoir à démoduler le message entier du canal de synchronisation. Le canal d'identification peut également comprendre une information relative à la phase de la séquence pilote de PN, et l'époque de ladite séquence. Dans un mode de réalisation, le procédé consiste à coder le canal d'identification au moyen du code de Golay.

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