Radio communication system and method for multicast...

H - Electricity – 04 – L

Patent

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Details

H04L 12/56 (2006.01) H04B 7/26 (2006.01) H04L 12/18 (2006.01) H04L 29/06 (2006.01) H04Q 7/38 (2006.01) H04Q 7/30 (2006.01)

Patent

CA 2382595

When an IGMP control message is included in a variable length packet having an address for performing one to one or one to multiple communication with mobile station units (106-1 to 106-3) at a base station unit (102), the IGMP control message is mapped to a short packet having a fixed length shorter than that of a fixed length packet used for communication with the mobile station units (106-1 to 106-3), and the variable length packet is mapped to a fixed length packet. The fixed length packet and the short packet are then transmitted as a frame signal. At the mobile station units (106-1 to 106-3) the frame signal is decomposed to take out the variable length packet and the short packet, and the IGMP control message is taken out from the short packet and mapped to another variable length packet, thus multiplexing both variable length packets.

Lorsqu'un message de commande IGMP est inclus dans un paquet à longueur variable pourvu d'une adresse servant à établir une communication biunivoque ou multiple avec des unités de stations mobiles (106-1 à 106-3) depuis une unité de station de base (102), le message de commande IGMP est configuré en un paquet court présentant une longueur fixe plus courte que celle d'un paquet de longueur fixe utilisé pour les communications avec les unités de stations mobiles (106-1 à 106-3), le paquet de longueur variable étant configuré en un paquet de longueur fixe. Le paquet de longueur fixe et le paquet court sont ensuite transmis sous la forme d'un signal de trame. Aux unités de stations mobiles (106-1 à 106-3), le signal de trame est décomposé de manière à retirer le paquet de longueur variable et le paquet court, et le message de commande IGMP est retiré du paquet court puis configuré en un autre paquet de longueur variable, multiplexant ainsi les deux paquets de longueur variable.

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