公开(公告)号：US06606323B1

公开(公告)日：2003-08-12

申请号：US09224469

申请日：1998-12-31

申请人： Ram S. Ramamurthy ,  Radhika R. Roy ,  Peter H. Stuntebeck

发明人： Ram S. Ramamurthy ,  Radhika R. Roy ,  Peter H. Stuntebeck

IPC分类号： H04L1228

CPC分类号： H04L12/4608 ,  H04L12/5601 ,  H04L29/12009 ,  H04L29/12018 ,  H04L61/10 ,  H04L2012/5607 ,  H04L2012/5617

摘要： Enhanced performance of a WAN is achieved by allowing devices to move from LAN to LAN and have the move be transparent to end user applications. This is accomplished by allowing devices to move, with no action being taken in response to a move. Instead, notice is taken of the LANE Emulation Client (LEC) address at which a device can be reached when the device that moved chooses to communicate with some other device. In such a device initiates communication, a table is updated in a LAN Emulation Server (LES), which is an entity maintained by the WAN that interconnects a number of LECs. A similar table is maintained in each LEC, and the table of each LEC is updated whenever a connection is made between one of its devices and some other device. At times, of course, a LEC would have an incorrect address of a sought destination device. In such a case, the LEC sends a query to the LES, and the LES provides what the LES believes to be the correct LEC address. When the LES cannot resolve an address, a message is broadcast to the LES entities of other “emulated LANs,” or ELANs, which contains their own LES entities, and those LES entities have an opportunity to provide the correct address.

摘要翻译： 通过允许设备从LAN移动到LAN并使终端用户应用程序的移动变得透明，可以实现WAN的增强性能。 这是通过允许设备移动来实现的，而不采取动作来响应移动。 取而代之的是，当移动设备选择与其他设备通信时，会注意到LANE仿真客户端（LEC）地址可以到达设备。 在这种设备中启动通信时，在LAN仿真服务器（LES）中更新一个表，该仿真服务器是连接多个LEC的由WAN维护的实体。 在每个LEC中保持类似的表，并且每当在其设备和其他设备之间进行连接时，更新每个LEC的表。 有时候，LEC会有一个不正确的寻址目标设备的地址。 在这种情况下，LEC向LES发送查询，LES提供LES认为是正确的LEC地址。 当LES无法解析地址时，会向其他“仿真LAN”的LES实体或包含其自己的LES实体的ELAN广播消息，并且这些LES实体有机会提供正确的地址。

公开(公告)号：US06407988B1

公开(公告)日：2002-06-18

申请号：US09166805

申请日：1998-10-06

申请人： Sanjay Agraharam ,  Michael W. Hodic ,  Ram S. Ramamurthy ,  Radhika R. Roy ,  David Hilton Shur

发明人： Sanjay Agraharam ,  Michael W. Hodic ,  Ram S. Ramamurthy ,  Radhika R. Roy ,  David Hilton Shur

IPC分类号： H04J324

CPC分类号： H04W8/065 ,  H04W8/082 ,  H04W8/20 ,  H04W12/02 ,  H04W80/04 ,  H04W88/182

摘要： A mobility support technique provides home agents and foreign agents in mobility aware access networks. Participating mobile hosts are assigned a home address that is used by other hosts as the mobile host's address. The home address actually addresses the home agent provided in the mobility aware access network. The home address provides additional privacy to the mobile host because it does not identify the mobile host's home premises network where the mobile host resides permanently absent any mobility of the mobile host. By providing home agents and foreign agents in a mobility aware access network, the agents may cooperatively establish optimal routing paths for data transmitted to a mobile host. The agents may identify a pseudo home agent, an agent in a mobility aware access network located near to a transmitting mobile host, that acts as the home agent of a destination mobile host. The pseudo home agent tunnels data directly to the destination mobile host without requiring the data to be routed first to the true home agent. In this regard, the pseudo home agent establishes a more direct routing path between the transmitting and destination mobile hosts.

摘要翻译： 移动支持技术在移动感知接入网络中提供归属代理和外部代理。 参与移动主机被分配一个家庭地址，由其他主机用作移动主机的地址。 归属地址实际上涉及在移动感知接入网络中提供的归属代理。 家庭地址为移动主机提供额外的隐私，因为它不识别移动主机的住宅网络，其中移动主机所驻留的移动主机永远不存在任何移动性。 通过在移动性感知接入网络中提供归属代理和外部代理，代理可以协作地为传送到移动主机的数据建立最佳的路由路径。 代理可以识别充当目的地移动主机的归属代理的伪归属代理，位于发送移动主机附近的移动感知访问网络中的代理。 伪归属代理将数据直接传送到目标移动主机，而不需要首先将数据路由到真正的归属代理。 在这方面，伪归属代理在发送和移动主机之间建立更直接的路由路径。

公开(公告)号：US5909431A

公开(公告)日：1999-06-01

申请号：US672841

申请日：1996-06-28

申请人： Ashok K. Kuthyar ,  Ram S. Ramamurthy ,  Radhika R. Roy

发明人： Ashok K. Kuthyar ,  Ram S. Ramamurthy ,  Radhika R. Roy

IPC分类号： H04L29/06 ,  H04N7/15 ,  H04L12/16 ,  H04Q11/00

CPC分类号： H04L65/1009 ,  H04L29/06 ,  H04L65/4038 ,  H04N7/152 ,  H04L29/06027

摘要： Real-time multimedia services are transmitted over a hybrid network including a nonguaranteed quality of service packet switched local area network and a circuit switched ISDN wide area network having a centralized multimedia bridge located within the wide area network. The local area networks and multimedia bridge are interconnected via ISDN routers. An algorithm executed by the multimedia bridge receives signals from the packet switched network and detects the absence of properties needed for real-time audio visual services. The data signals are processed to compensate for the absence of the properties and then are transmitted over the wide area network to enable real-time audio visual services.

摘要翻译： 实时多媒体业务通过混合网络传输，包括非保证业务分组交换局域网质量和具有位于广域网内的集中式多媒体网桥的电路交换ISDN广域网。 局域网和多媒体网桥通过ISDN路由器互连。 由多媒体桥执行的算法从分组交换网络接收信号，并检测到实时视听服务所需的属性不存在。 处理数据信号以补偿不存在的属性，然后通过广域网传输以实现实时视听服务。

公开(公告)号：US07940703B2

公开(公告)日：2011-05-10

申请号：US12605741

申请日：2009-10-26

申请人： Radhika R. Roy

发明人： Radhika R. Roy

IPC分类号： H04L12/16

CPC分类号： H04L12/2801 ,  H04L2012/5605 ,  H04L2012/5606 ,  H04L2012/561 ,  H04L2012/5638 ,  H04L2012/5642 ,  H04Q11/0478

摘要： A technique for providing real-time multimedia conferencing services with guaranteed performance, in a hybrid networking environment, by interconnecting cable modem-based premises networks via hybrid fiber coaxial (HFC) access networks and an ATM wide area network is disclosed. The ATM wide area network may be divided into a plurality of access network domains and one backbone network domain to provide efficient and intelligent multimedia conferencing services. Each ATM access network domain has one cable modem server as well as access multimedia bridge server. There is only one central network server and one central multimedia bridge server within the backbone network domain. Each cable modem server located in an ATM access network domain maintains necessary information of how the cable network bandwidth is used by existing calls, and will be allocated when new multimedia conference calls are initiated, in accordance with desired priority and performance levels.

摘要翻译： 公开了一种在混合网络环境中通过混合光纤同轴（HFC）接入网络和ATM广域网互联基于电缆调制解调器的房屋网络来提供具有保证性能的实时多媒体会议业务的技术。 ATM广域网可以分为多个接入网域和一个骨干网域，以提供高效智能的多媒体会议业务。 每个ATM接入网域都有一个电缆调制解调器服务器以及接入多媒体桥服务器。 骨干网域内只有一台中央网络服务器和一台中央多媒体网桥服务器。 位于ATM接入网域中的每个电缆调制解调器服务器保持有关现有呼叫如何使用有线网络带宽的必要信息，并且将根据期望的优先级和性能水平在新的多媒体会议呼叫被启动时被分配。

公开(公告)号：US07623475B1

公开(公告)日：2009-11-24

申请号：US11352843

申请日：2006-02-13

申请人： Radhika R. Roy

发明人： Radhika R. Roy

IPC分类号： H04L12/16

CPC分类号： H04L12/2801 ,  H04L2012/5605 ,  H04L2012/5606 ,  H04L2012/561 ,  H04L2012/5638 ,  H04L2012/5642 ,  H04Q11/0478

摘要： A technique for providing real-time multimedia conferencing services with guaranteed performance, in a hybrid networking environment, by interconnecting cable modem-based premises networks via hybrid fiber coaxial (HFC) access networks and an ATM wide area network is disclosed. The ATM wide area network may be divided into a plurality of access network domains and one backbone network domain to provide efficient and intelligent multimedia conferencing services. Each ATM access network domain has one cable modem server as well as access multimedia bridge server. There is only one central network server and one central multimedia bridge server within the backbone network domain. Each cable modem server located in an ATM access network domain maintains necessary information of how the cable network bandwidth is used by existing calls, and will be allocated when new multimedia conference calls are initiated, in accordance with desired priority and performance levels.

公开(公告)号：US07590104B1

公开(公告)日：2009-09-15

申请号：US10773788

申请日：2004-02-06

申请人： Radhika R. Roy

发明人： Radhika R. Roy

IPC分类号： H04L12/00

CPC分类号： H04L65/1009 ,  H04L12/6418 ,  H04L29/06 ,  H04L29/06027 ,  H04L29/12009 ,  H04L29/12047 ,  H04L61/15 ,  H04L65/103 ,  H04L65/104 ,  H04L65/1043 ,  H04L2012/6472 ,  H04L2012/6486

摘要： A method for communication employs a plurality of gatekeepers and involves receiving at a first gatekeeper a request for information. If the information is not known by the first gatekeeper, a request is sent via a second gatekeeper to a third gatekeeper for the information. If the information is known by the third gatekeeper, it is returned to the first gatekeeper, illustratively via the second gatekeeper. The gatekeepers are at a single gatekeeper hierarchical level.

摘要翻译： 通信方法采用多个守门人，并且涉及在第一关守处接收对信息的请求。 如果信息不是第一个看门人知道的，那么请求将通过第二个看门人发送给第三个看门人，以获得该信息。 如果信息是由第三个看门人知道的，则通过第二个看门人返回给第一个看门人。 守门员处于单一的守门人层级。

公开(公告)号：US07346022B1

公开(公告)日：2008-03-18

申请号：US09642980

申请日：2000-08-18

申请人： Radhika R. Roy

发明人： Radhika R. Roy

IPC分类号： H04Q7/20

CPC分类号： H04L65/1009 ,  H04L29/06 ,  H04L29/06027 ,  H04L29/12009 ,  H04L29/12122 ,  H04L29/12188 ,  H04L29/12584 ,  H04L29/12594 ,  H04L61/1547 ,  H04L61/1588 ,  H04L61/2596 ,  H04L61/301 ,  H04L61/306

摘要： The present invention provides a method and system for assuring H.323 alias address portability to an H.323 user in real-time H.323 multimedia communications where the H.323 user is registered with a home gatekeeper for the home zone of the H.323 user. Alias address portability may be obtained using a central database that is known to the administrative zones and is used for alias address mapping, or alternatively, may be obtained by using a distributed database. The method may be implemented by: sending, by the H.323 user, a message with a called H.323 entity's alias address, to the home gatekeeper to originate a call to the called H.323 entity; confirming that the alias address, services, and service providers are portable; converting the alias address to a called routable alias address for the called H.323 entity and sending the alias address to the H.323 user; and placing the call to the called H.323 entity.

摘要翻译： 本发明提供一种方法和系统，用于在实时H.323多媒体通信中向H.323用户确认H.323别名地址可携带性，其中H.323用户向H的本地用户注册H .323用户。 可以使用管理区域已知的并用于别名地址映射的中央数据库获取别名地址可移植性，或者可以通过使用分布式数据库获得别名地址可移植性。 该方法可以通过以下方式来实现：由H.323用户将具有被叫H.323实体的别名地址的消息发送到归属关守以发起对被叫H.323实体的呼叫; 确认别名地址，服务和服务提供者是可移植的; 将别名地址转换为被叫H.323实体的被叫可路由别名地址，并将别名地址发送给H.323用户; 并将呼叫发送到被叫H.323实体。

公开(公告)号：US07103066B2

公开(公告)日：2006-09-05

申请号：US09974789

申请日：2001-10-12

申请人： Radhika R. Roy

发明人： Radhika R. Roy

IPC分类号： H04J3/16

CPC分类号： H04L65/1009 ,  H04L12/18 ,  H04L29/06027 ,  H04L63/08 ,  H04L63/104 ,  H04L63/20 ,  H04L65/4007 ,  H04L69/18

摘要： A novel method of and system for providing common value-added services for two-way point-to-point, multi-point-to-multi-point, point-to-multi-point, and/or multi-point-to-point real-time communications using various communication protocols. The present invention provides common value-added service protocols for receiving a request from a first of a multiple of communication protocol sources for a first value-added service using the first common value-added service protocol, and providing the requested first value-added service to the first communication protocol source using the first common value-added service protocol. The present invention further includes receiving a request from a second of the multiple communication protocol sources for the first value-added service using the first common value-added service protocol, and providing the requested first value-added service to the second communication protocol source using the first common value-added service protocol.

公开(公告)号：US07046637B2

公开(公告)日：2006-05-16

申请号：US09880027

申请日：2001-06-14

申请人： Radhika R. Roy

发明人： Radhika R. Roy

IPC分类号： H04L12/16

CPC分类号： H04L12/2801 ,  H04L2012/5605 ,  H04L2012/5606 ,  H04L2012/561 ,  H04L2012/5638 ,  H04L2012/5642 ,  H04Q11/0478

摘要： A technique for providing real-time multimedia conferencing services with guaranteed performance, in a hybrid networking environment, by interconnecting cable modem-based premises networks via hybrid fiber coaxial (HFC) access networks and an ATM wide area network is disclosed. The ATM wide area network may be divided into a plurality of access network domains and one backbone network domain to provide efficient and intelligent multimedia conferencing services. Each ATM access network domain has one cable modem server as well as access multimedia bridge server. There is only one central network server and one central multimedia bridge server within the backbone network domain. Each cable modem server located in an ATM access network domain maintains necessary information of how the cable network bandwidth is used by existing calls, and will be allocated when new multimedia conference calls are initiated, in accordance with desired priority and performance levels.

公开(公告)号：US07002989B2

公开(公告)日：2006-02-21

申请号：US09825304

申请日：2001-04-04

申请人： Hemant Agrawal ,  Radhika R. Roy ,  Vipin Palawat

发明人： Hemant Agrawal ,  Radhika R. Roy ,  Vipin Palawat

IPC分类号： H04J3/16

CPC分类号： H04L65/1033 ,  H04L29/06 ,  H04L29/06027 ,  H04L29/12594 ,  H04L45/741 ,  H04L61/106 ,  H04L61/30 ,  H04L65/1006 ,  H04L65/1009 ,  H04L65/1043 ,  H04L65/1069 ,  H04L65/1073 ,  H04L69/08 ,  H04Q11/04 ,  H04Q2213/1302 ,  H04Q2213/13034 ,  H04Q2213/1304 ,  H04Q2213/13103 ,  H04Q2213/13196 ,  H04Q2213/13204 ,  H04Q2213/13216 ,  H04Q2213/13389

摘要： An interworking function (IWF) for a first and second protocol based network, for example, an H.323 protocol based network and an SIP protocol based network comprises an interworking gateway server including a state machine for defining each call processing state and a translation table for use in translating addresses formatted in each protocol. A method of interworking for use in interworking between said first protocol based network and said second protocol based network comprises the steps of receiving at said interworking gateway server serving said first and second protocol based networks a request from an endpoint in the first or second protocol based networks, establishing a state machine in memory whereby, for each state of said state machine, a message associated with that state is categorized as one of a triggering message, a non-triggering message and an error message, establishing a translation table in said memory whereby an address formatted in said first protocol has a one-for-one correspondence with an address formatted in said second protocol, processing said request in accordance with said translation table and said state machine and permitting communication between said first and second endpoints utilizing a realtime transport protocol. In the event media is terminated at said interworking gateway server, the interworking gateway server, in one embodiment, comprises a media switching fabric for switching media terminated at the gateway to an addressed endpoint capable of receiving it.

摘要翻译： 用于基于第一和第二协议的网络的互通功能（IWF），例如基于H.323协议的网络和基于SIP协议的网络包括互通网关服务器，其包括用于定义每个呼叫处理状态的状态机和翻译表 用于翻译每个协议格式化的地址。 一种用于所述基于第一协议的网络和所述基于第二协议的网络之间的互通中的交互工作的方法包括以下步骤：在所述互通网关服务器处接收服务于基于第一和第二协议的网络的基于第一或第二协议的端点的请求 网络，在存储器中建立状态机，由此，对于所述状态机的每个状态，与该状态相关联的消息被分类为触发消息，非触发消息和错误消息之一，在所述存储器中建立转换表 由此在所述第一协议中格式化的地址与所述第二协议格式化的地址具有一一对应关系，根据所述转换表和所述状态机处理所述请求，并且利用实时的方式允许所述第一和第二端点之间的通信 传输协议。 在媒体终止于所述互通网关服务器的情况下，在一个实施例中，互通网关服务器包括用于将终端于网关处的媒体切换到能够接收它的寻址端点的媒体交换结构。