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发明授权
US07969979B2 Distribution of multicast data to users 有权
向用户分发组播数据

Distribution of multicast data to users
摘要：
A method of multicasting a data file. The method includes transmitting a notification on an upcoming multicast transmission to a plurality of receivers (20) designated to receive the multicast transmission, tuning by at least one of the plurality of receivers (20) to one or more multicast channels, responsive to the notification, transmitting a data file, from a data server (42), on the one or more multicast channels, without the data server (42) receiving acknowledgements from the receivers (20) on whether they received the notification, determining receivers (20) designated to receive the multicast transmission that did not receive at least a portion of the data file; and attempting to deliver the data file to the determined receivers (20).
摘要（中）：

一种组播数据文件的方法。 所述方法包括：响应于所述通知，将指定为接收所述多播传输的多个接收机（20）的即将到来的多播传输的通知发送到所述多个接收机（20）中的至少一个接收机（20），调谐到一个或多个多播信道 在所述一个或多个多播信道上从数据服务器（42）发送数据文件，而所述数据服务器（42）从所述接收机（20）接收到是否接收到所述通知的确认，确定指定的接收机（20） 以接收未接收到数据文件的至少一部分的多播传输; 并尝试将数据文件传送到确定的接收器（20）。

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