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1. 发明授权

US5943321A Circuit set-up and caching for multimedia multipoint servers 失效
标题翻译：多媒体多点服务器的电路设置和缓存
公开(公告)号：US5943321A
公开(公告)日：1999-08-24
申请号：US915496
申请日：1997-08-20
申请人： Marc St-Hilaire , Yonik Breton , Pierre Brisson , Sylvain Labelle
发明人： Marc St-Hilaire , Yonik Breton , Pierre Brisson , Sylvain Labelle
IPC分类号： H04N7/15 , H04L12/16 , H04M1/66 , H04N7/14 , H04Q11/00
CPC分类号： H04N7/152
摘要： An MMS circuit set-up system includes a real time link manager (RTLM) which is coupled to the audio video controller (AVC) of the MMS. The AVC receives data from the MMS reservation system about the starting and ending times for conferences and sends commands to the RTLM to set up connections for the conference. The RTLM is provided with a database of configuration and location information about remote sites and has access to the resource database of one or more ATM switches and/or other networking equipment. The RTLM sends configuration messages to ATM switches and/or other networking equipment in order to set up a conference. According to a presently preferred embodiment, the ATM switches are controlled by the RTLM using SNMP (simple network management protocol) via an ETHERNET.TM. connection to the slot controllers of the ATM switches and networking equipment which does not support SNMP are controlled by the RTLM using TCP/IP (transaction control protocol/internet protocol) via an ETHERNET.TM. connection to the servers. The ATM circuits are preferably created by adding entries to an SPVC table in the ATM switch. According to one aspect of the invention, when ATM circuits are no longer needed, the SPVC table entries are not deleted, but the status for the circuit is marked "idle". This allows the circuit to be reused with minimal set-up time when it is again needed.
摘要翻译： MMS电路设置系统包括耦合到MMS的音频视频控制器（AVC）的实时链路管理器（RTLM）。 AVC从MMS预留系统接收关于会议的开始和结束时间的数据，并向RTLM发送命令以建立会议的连接。 RTLM被提供有关于远程站点的配置和位置信息的数据库，并且可以访问一个或多个ATM交换机和/或其他网络设备的资源数据库。 RTLM向ATM交换机和/或其他网络设备发送配置消息，以建立会议。根据目前优选的实施例，ATM交换机通过使用SNMP（简单网络管理协议）的RTLM通过ETHERNET TM连接到ATM交换机的时隙控制器和不支持SNMP的网络设备来控制，RTLM使用 TCP / IP（事务控制协议/互联网协议）通过ETHERNET TM连接到服务器。优选地，ATM电路通过将条目添加到ATM交换机中的SPVC表来创建。根据本发明的一个方面，当不再需要ATM电路时，不删除SPVC表项，而是将该电路的状态标记为“空闲”。这样就可以在再次需要时以最小的设置时间重新使用电路。

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