Transmitting and receiving devices in cellular system

Details Transmitting and receiving devices in cellular system Transmitting and receiving devices in cellular system

H - Electricity

04

J

H04J 11/00 (2006.01)

Patent

CA 2673604

In a multicarrier cellular system, a second synchronizing code (a Walsh code or a GCL code), which is subjected to the mapping and which becomes a second synchronizing channel, is used as a signal for a mobile station terminal device itself to specify which base station cell it is in. A signal transmitted from the base station to the mobile station terminal device is subjected to the mapping, and becomes a wireless frame which has a two-dimensional expansion in a frequency direction and a time direction. A first synchronizing channel and the second synchronizing channel are subjected to the mapping, and becomes a synchronizing channel which is implanted at a plurality of portions in the wireless frame.In the case where a certain series number of the second synchronizing code to specify a cell or a cell group as the second synchronizing channel is subjected to the mapping and becomes the wireless frame, such a phase rotation that one wireless frame becomes one cycle or a circulating shift is provided to the second synchronizing code in accordance with a position where a synchronizing channel subjected to the mapping is in the wireless frame and the mapping is carried out for the second synchronizing code. On the receiving side, when the phase rotation angle or the circulating shift amount of the second synchronizing code is known, the head timing of the wireless frame is known.

L'invention consiste à utiliser, dans un système cellulaire multiporteuse, un second code de synchronisation (code Walsh ou code GCL), qui est soumis à la binarisation et qui devient un second canal de synchronisation, comme signal pour un dispositif terminal à poste mobile proprement dit pour préciser la cellule de poste de base dans laquelle il se trouve. Un signal émis du poste de base au dispositif terminal à poste mobile est soumis à la binarisation, et devient une trame sans fil ayant une expansion en deux dimensions en fréquence et en temps. Un premier canal de synchronisation et le second canal de synchronisation sont soumis à la binarisation, pour devenir un canal de synchronisation qui est implanté en une pluralité de parties dans la trame sans fil. Si un certain nombre de série du second code de synchronisation permettant de préciser une cellule ou un groupe de cellules faisant office de second canal de synchronisation est soumis à la binarisation et devient la trame sans fil, on applique une rotation de phase telle qu'une trame sans fil devient un cycle ou un décalage de circulation au second code de synchronisation selon une position dans laquelle un canal de synchronisation soumis à la binarisation se trouve dans la trame sans fil et la binarisation est effectuée pour le second code de synchronisation. Au niveau de la partie réception, lorsque l'on connaît l'angle de rotation de phase ou le degré de décalage de circulation du second code de synchronisation, on connaît également le minutage d'attaque de la trame sans fil.

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