Cdma communication method and spread spectrum communication...

H - Electricity – 04 – J

Patent

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H04J 13/02 (2006.01) H04B 1/69 (2006.01) H04B 7/216 (2006.01) H04B 7/26 (2006.01) H04Q 7/36 (2006.01) H04J 13/00 (2006.01)

Patent

CA 2206063

A frequency band for communication between a base station and mobile stations is divided into a reverse-link and a forward-link bands. In each of these bands, carrier frequencies are defined in correspondence with sub frequency bands each having one of several bandwidths. To each of these bands of each mobile station, a sub frequency band with a bandwidth matching a data traffic rate is assigned in advance. Each mobile station spectrum-spreads a reservation packet and transmits the resultant packet by a prescribed carrier frequency corresponding to the reverse-link sub frequency band. The base station spectrum-spreads a response packet and transmits the resultant packet by a prescribed carrier frequency corresponding to the forward-link sub frequency band. Each mobile station spectrum-spreads a data packet by a spreading code for data traffic channel specified in the response packet and transmits the resultant packet by the reverse-link carrier frequency.

Bande de fréquence permettant à une station de base et à des stations mobiles de communiquer entre elles et divisée selon une bande à liaison amont et une bande à liaison aval. La fréquence porteuse de chacune de ces deux bandes est définie par rapport à des bandes de sous-fréquence ayant chacune plusieurs largeurs de bande. Chacune des bandes de chaque station mobile reçoit d'avance une bande de fréquence dont la largeur correspond au taux de trafic des données. Chaque station mobile étale le spectre d'un paquet de réservation et transmet le paquet qui en résulte à l'aide de la fréquence porteuse requise, qui correspond à la bande de sous-fréquence à liaison aval. Chaque station mobile étale le spectre d'un paquet de données selon un code correspondant au canal de trafic de données indiqué dans le paquet de réponse et transmet le paquet qui en résulte à l'aide de la fréquence porteuse à liaison amont.

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