公开(公告)号：US20090089397A1

公开(公告)日：2009-04-02

申请号：US12239090

申请日：2008-09-26

申请人： Motohiro MORI ,  Yuuji Nanba ,  Shuuichi Enomoto ,  Tooru Natsumi ,  Shigehiro Takeuchi ,  Hiroyuki Tanaka ,  Tomohiro Ikeda ,  Takashi Nagata

发明人： Motohiro MORI ,  Yuuji Nanba ,  Shuuichi Enomoto ,  Tooru Natsumi ,  Shigehiro Takeuchi ,  Hiroyuki Tanaka ,  Tomohiro Ikeda ,  Takashi Nagata

IPC分类号： G06F15/16

CPC分类号： H04L12/1881

摘要： A multicast control apparatus includes: a delivery instructing unit, responsive to a first one of received viewing requests, to instruct delivery to a first external apparatus of the content data; a delivery determining unit to determine whether a corresponding number of deliveries of the content data exceeds a delivery limit; calculating units to calculate (1) a time necessary to create a cache of a copy of the content data and (2) a remaining time before viewing of the content data delivered from the first external apparatus is finished; a control unit to set a second and subsequent ones of the received viewing requests to a wait state if the delivery limit is exceeded by the first received viewing request, and to instruct creation of the cache to a second external apparatus if the necessary time is shorter than the remaining time.

摘要翻译： 多播控制装置包括：发送指示单元，响应于所接收的观看请求中的第一个，指示向第一外部设备发送内容数据; 确定所述内容数据的相应数量是否超过传送限制的传送确定单元; 计算单元以计算（1）创建内容数据的副本的高速缓存所需的时间;（2）完成从第一外部设备发送的内容数据的观看之前的剩余时间; 控制单元，如果第一接收到的观看请求超过了传送限制，则将接收的观看请求中的第二个和后续的观看请求设置为等待状态，并且如果必要时间更短，则指示将高速缓存创建到第二外部设备 比剩下的时间。