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1. 发明授权

US6138144A Method for managing multicast addresses for transmitting and receiving multimedia conferencing information on an internet protocol (IP) network implemented over an ATM network 失效
标题翻译：一种用于管理用于在ATM网络上实现的因特网协议（IP）网络上发送和接收多媒体会议信息的组播地址的方法
公开(公告)号：US6138144A
公开(公告)日：2000-10-24
申请号：US881763
申请日：1997-06-24
申请人： Antonio DeSimone , Joseph Golan , Ashok K. Kuthyar , Bryant Richard Parent , Ram S. Ramamurthy , David Hilton Shur
发明人： Antonio DeSimone , Joseph Golan , Ashok K. Kuthyar , Bryant Richard Parent , Ram S. Ramamurthy , David Hilton Shur
IPC分类号： H04L12/18 , H04L29/06 , H04L29/12 , G06F15/16
CPC分类号： H04L29/12216 , H04L12/18 , H04L29/06 , H04L29/12018 , H04L29/12292 , H04L29/12301 , H04L29/12924 , H04L61/10 , H04L61/2007 , H04L61/2069 , H04L61/2076 , H04L61/6063 , H04L69/168 , H04L29/12047 , H04L61/15 , H04L69/16
摘要： In a multicast capable IP network implemented over an ATM network, each client terminal on a multimedia conference, for each media type it transmits, is assigned a multicast IP address and a port number (together known as a socket) on which to transmit packets, wherein each assigned multicast IP address is unique and different than the multicast IP address assigned to any other client for any media type. Each client terminal then selects, for each media type, which clients on the conference it wants to receive packets from. Only packets that are in fact requested by a client are routed over the multicast IP network to the requesting client. A single special purpose Multicast Address Resolution System (MARS) server is associated with the conference when the conference is established. Each client terminal uses that MARS server, whether on the same or different IP sub-networks, but on a common ATM network, for purposes of mapping the multicast IP addresses used in the conference into a set of unicast ATM endpoint addresses used by the ATM-connected client terminals. Similarly, when a specific conference uses a Multicast Server, a single special purpose Multicast Server is used for all clients on the conference, whether on the same or different IP sub-networks, for purposes of establishing point-to-multipoint ATM connections to the conference endpoints.
摘要翻译：在通过ATM网络实现的多播能力的IP网络中，对于其发送的每种媒体类型，在多媒体会议上的每个客户端被分配有在其上传送分组的多播IP地址和端口号（一起被称为套接字）其中每个分配的多播IP地址是唯一的，并且与针对任何媒体类型分配给任何其他客户端的多播IP地址不同。然后，每个客户端终端针对每种媒体类型选择要在其上接收分组的会议上哪些客户端。事实上客户端请求的报文只能通过组播IP网络路由到请求客户端。当会议建立时，单个专用组播地址解析系统（MARS）服务器与会议相关联。每个客户终端使用该MARS服务器，无论是在相同或不同的IP子网上，但是在公共ATM网络上，用于将会议中使用的组播IP地址映射到由ATM使用的一组单播ATM端点地址连接的客户终端。类似地，当特定会议使用多播服务器时，无论是在相同的还是不同的IP子网上，单个专用多播服务器被用于会议上的所有客户端，以便建立到多个组播服务器的点对多点ATM连接会议端点。

2. 发明授权

US6011782A Method for managing multicast addresses for transmitting and receiving multimedia conferencing information on an internet protocol (IP) network 失效
标题翻译：用于管理用于在因特网协议（IP）网络上发送和接收多媒体会议信息的多播地址的方法
公开(公告)号：US6011782A
公开(公告)日：2000-01-04
申请号：US848456
申请日：1997-05-08
申请人： Antonio DeSimone , Joseph Golan , Ashok K. Kuthyar , Bryant Richard Parent , Ram S. Ramamurthy , David Hilton Shur
发明人： Antonio DeSimone , Joseph Golan , Ashok K. Kuthyar , Bryant Richard Parent , Ram S. Ramamurthy , David Hilton Shur
IPC分类号： H04L12/18 , H04L29/06 , H04L12/16
CPC分类号： H04L12/1822 , H04L69/162 , H04L12/1818 , H04L69/16
摘要： In a multicast capable IP network, each client terminal on a multimedia conference, for each media type it transmits, is assigned a multicast IP address and a port number (together known as a socket) on which to transmit packets, wherein each assigned multicast IP address is unique and different than the multicast IP address assigned to any other client for any media type. Each client terminal then selects, for each media type, which clients on the conference it wants to receive packets from. Only packets that are in fact requested by a client are routed over the multicast IP network to the requesting client. When a conference originator establishes the conference, a number of multicast IP addresses are allocated for later assignment to the clients during the conference. As each client joins the conference, it is assigned a multicast IP address from the allocated group for each media type it will transmit. Those assigned addresses are then marked as unavailable for assignment to any other client that subsequently joins the conference. When the original client later exits the conference, its assigned multicast IP address(es) is (are) marked as available for assignment to a later joining client. At the conclusion of the conference, all multicast IP addresses allocated to the conference are marked as available for use in another conference.
摘要翻译：在具有多路广播能力的IP网络中，对于其发送的每种媒体类型，在多媒体会议上的每个客户端被分配有在其上传送分组的多播IP地址和端口号（一起称为套接字），其中每个分配的多播IP 地址是唯一的，不同于为任何媒体类型分配给任何其他客户端的组播IP地址。然后，每个客户端终端针对每种媒体类型选择要在其上接收分组的会议上哪些客户端。事实上客户端请求的报文只能通过组播IP网络路由到请求客户端。当会议发起人建立会议时，会议期间分配多个组播IP地址供以后分配给客户端。随着每个客户端加入会议，从被分配的组中为其将要传输的每个媒体类型分配一个多播IP地址。那些分配的地址然后被标记为不可用于分配给随后加入会议的任何其他客户端。当原始客户端稍后退出会议时，其分配的多播IP地址被标记为可用于分配给稍后加入的客户端。在会议结束时，分配给会议的所有组播IP地址都被标记为可用于另一个会议。

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