公开(公告)号：US06298039B1

公开(公告)日：2001-10-02

申请号：US09017105

申请日：1998-01-31

申请人： Richard Wayne Buskens ,  Thomas F. La Porta ,  Yow-Jian Lin ,  Kazutaka Murakami ,  Ramachandran Ramjee

发明人： Richard Wayne Buskens ,  Thomas F. La Porta ,  Yow-Jian Lin ,  Kazutaka Murakami ,  Ramachandran Ramjee

IPC分类号： H04L1250

CPC分类号： H04Q3/0037 ,  G06F11/1482 ,  G06F11/2097 ,  H04L69/40

摘要： A method of delivering highly-reliable, fault-tolerant communications services in a telecommunications network of distributed call processing systems. The method advantageously identifies a set of objects within the telecommunications network requiring checkpointing; checkpoints the objects; and subsequently restores the checkpointed objects in the event of a failure. Various aspects of the method are disclosed, including restoration strategies.

摘要翻译： 在分布式呼叫处理系统的电信网络中提供高度可靠的容错通信服务的方法。 该方法有利地识别需要检查点的电信网络内的一组对象; 检查对象; 并在随后的故障情况下恢复检查点对象。 公开了该方法的各个方面，包括恢复策略。

公开(公告)号：US06192250B1

公开(公告)日：2001-02-20

申请号：US09145094

申请日：1998-09-01

申请人： Richard Wayne Buskens ,  Michael P. Deitz ,  Thomas F. La Porta ,  Yow-Jian Lin ,  Kazutaka Murakami ,  Ramachandran Ramjee

发明人： Richard Wayne Buskens ,  Michael P. Deitz ,  Thomas F. La Porta ,  Yow-Jian Lin ,  Kazutaka Murakami ,  Ramachandran Ramjee

IPC分类号： H04M100

CPC分类号： H04W88/16 ,  H04W92/14

摘要： A “cluster mobile switching center” (cMSC) is arranged to perform the switching and control functions of a conventional mobile switching center (MSC), including, if desired, the additional functions of a conventional visitor location register (VLR). The cMSC is implemented on distributed processors using modular software. Advantageously, a specific instance of middleware, known as Common Object Request Broker Architecture (CORBA), is used as the communications middleware. Functionally, the cMSC is arranged to have two classes of servers: (1) Interworking managers (IMs) that act as gateways and provide interfaces to external network elements, and (2) core servers that perform call processing (registration, location updates, incoming and outgoing call processing) functions and communicate with each other using CORBA. IMs terminate standard protocols with the external elements and use CORBA to communicate with the core servers. Software objects are defined to perform specific tasks, manage particular resources, and interact to provide end-to-end services.

摘要翻译： “集群移动交换中心”（cMSC）被配置为执行常规移动交换中心（MSC）的切换和控制功能，如果需要，包括常规访问者位置寄存器（VLR）的附加功能。 cMSC使用模块化软件在分布式处理器上实现。 有利地，被称为通用对象请求代理体系结构（CORBA）的中间件的特定实例被用作通信中间件。 在功能上，cMSC被设置为具有两类服务器：（1）作为网关的互通管理器（IM）并且向外部网元提供接口，以及（2）执行呼叫处理的核心服务器（注册，位置更新，传入 和呼出处理）功能并使用CORBA相互通信。 IMs使用外部元素终止标准协议，并使用CORBA与核心服务器进行通信。 软件对象被定义为执行特定任务，管理特定资源并进行交互以提供端到端服务。

公开(公告)号：US06654359B1

公开(公告)日：2003-11-25

申请号：US09210072

申请日：1998-12-11

申请人： Thomas F. La Porta ,  Kazutaka Murakami ,  Ramachandran Ramjee ,  Sandra R. Thuel ,  Kannan Varadhan

发明人： Thomas F. La Porta ,  Kazutaka Murakami ,  Ramachandran Ramjee ,  Sandra R. Thuel ,  Kannan Varadhan

IPC分类号： H04J1228

CPC分类号： H04L61/2015 ,  H04L29/12216 ,  H04L29/12301 ,  H04L29/12311 ,  H04L29/12801 ,  H04L61/2076 ,  H04L61/2084 ,  H04L61/6004 ,  H04W40/248 ,  H04W40/28 ,  H04W40/36 ,  H04W80/04 ,  H04W88/005

摘要： Domains are defined to incorporate a subnet including a plurality of base stations and routers. Base stations are used by mobile devices to attach to the wired portion of a packet-based network, such as the Internet, and exchange packets thereover with a correspondent node. Local mobility between domain base stations is provided by including and updating routing table entries at domain routers and base stations for forwarding packets having a mobile device's address as a destination address to the mobile device. Packets are delivered to the mobile device regardless of the domain base station to which the mobile device is attached. When a mobile device is attached to a base station included within a foreign domain, a care-of address is assigned, and packets are tunneled for delivery of packets to the mobile device. Only one care-of address is required per mobile device per foreign domain. Routing table entries used for packet delivery are updated on a purely local subnet basis within domains, whether home domain or foreign domain, making handoffs between base stations substantially transparent to the home agent and the correspondent node.

摘要翻译： 域被定义为并入包括多个基站和路由器的子网。 移动设备使用基站来附加到诸如因特网的基于分组的网络的有线部分，并且与对应节点交换分组。 通过在域路由器和基站处包括和更新路由表条目来提供域基站之间的本地移动，用于将具有移动设备地址的分组转发到移动设备。 无论移动设备连接到的域基站如何，都将数据包传送到移动设备。 当移动设备附接到包含在外部域中的基站时，分配转交地址，并且分组被隧道传送到移动设备的分组。 每个移动设备每个外国域只需要一个转交地址。 用于分组传递的路由表条目在域内纯属于本地子网进行更新，无论是归属域还是外部域，使基站之间的切换对归属代理和通信节点基本上是透明的。

公开(公告)号：US07239618B1

公开(公告)日：2007-07-03

申请号：US09210213

申请日：1998-12-11

申请人： Thomas F. La Porta ,  Kazutaka Murakami ,  Ramachandran Ramjee ,  Sandra R. Thuel ,  Kannan Varadhan

发明人： Thomas F. La Porta ,  Kazutaka Murakami ,  Ramachandran Ramjee ,  Sandra R. Thuel ,  Kannan Varadhan

IPC分类号： H04Q7/00

CPC分类号： H04L61/2015 ,  H04L29/06 ,  H04L29/12018 ,  H04L29/12216 ,  H04L29/12301 ,  H04L29/12311 ,  H04L29/12801 ,  H04L61/10 ,  H04L61/2076 ,  H04L61/2084 ,  H04L61/6004 ,  H04W8/087 ,  H04W36/04 ,  H04W80/04

摘要： Local mobility within a subnet is supported by classifying wireless base stations, and the routers used to forward packets to those base stations, within defined domains. Domains are defined to incorporate a subnet having a plurality of base stations. Base stations are used by mobile devices to attach to the wired portion of a packet-based network, such as the Internet, and exchange packets thereover with a correspondent node. Packets sent from the correspondent node to the mobile device have a packet destination address corresponding to the mobile device. The mobile device retains this address for the duration of time it is powered up and attached to the Internet via any base station within a given domain. Host-based routing is utilized to update routing table entries corresponding to the mobile device at routers incorporated within a single domain. The routing table entries are established and updated via path setup schemes to convey packets destined for the mobile device along the proper established path through the domain routers and base stations, regardless of the domain base station through which the mobile device is attached. Path setup schemes utilize power up, refresh, and handoff path setup messages to maintain the proper relationship between router interfaces and packet addresses for routing table entries.

摘要翻译： 通过对无线基站进行分类来支持子网内的本地移动性，并且用于将数据包转发到定义域内的那些基站的路由器。 域定义为包含具有多个基站的子网。 移动设备使用基站来附加到诸如因特网的基于分组的网络的有线部分，并且与对应节点交换分组。 从通信节点发送到移动设备的分组具有对应于移动设备的分组目的地地址。 移动设备在其被加电并且经由给定域内的任何基站连接到因特网的时间内保留该地址。 基于主机的路由用于在单个域内的路由器上更新与移动设备相对应的路由表条目。 通过路径设置方案建立和更新路由表条目，以便通过域路由器和基站传送去往移动设备的分组沿着适当的建立路径，而不管移动设备通过哪个域基站。 路径设置方案利用上电，刷新和切换路径建立消息来维护路由器接口和路由表条目的包地址之间的适当关系。

公开(公告)号：US06763007B1

公开(公告)日：2004-07-13

申请号：US09209705

申请日：1998-12-11

申请人： Thomas F. La Porta ,  Kazutaka Murakami ,  Ramachandran Ramjee ,  Sandra R. Thuel ,  Kannan Varadhan

发明人： Thomas F. La Porta ,  Kazutaka Murakami ,  Ramachandran Ramjee ,  Sandra R. Thuel ,  Kannan Varadhan

IPC分类号： H04Q700

CPC分类号： H04W8/082 ,  H04L45/02 ,  H04W8/087 ,  H04W80/04

摘要： Local mobility within a subnet is supported by classifying wireless base stations, and the routers used to forward packets to those base stations, within defined domains. Domains are defined to incorporate a subnet having a plurality of base stations. Base stations are used by mobile devices to attach to the wired portion of a packet-based network, such as the Internet, and exchange packets thereover with a correspondent node. Packets sent from the correspondent node to the mobile device have a packet destination address corresponding to the mobile device. The mobile device retains this address for the duration of time it is powered up and attached to the Internet via any base station within a given domain. Host-based routing is utilized to update routing table entries corresponding to the mobile device at routers incorporated within a single domain. The routing table entries are established and updated via path setup schemes to convey packets destined for the mobile device along the proper established path through the domain routers and base stations, regardless of the domain base station through which the mobile device is attached. Path setup schemes utilize power up, refresh, and handoff path setup messages to maintain the proper relationship between router interfaces and packet addresses for routing table entries.

摘要翻译： 通过对无线基站进行分类来支持子网内的本地移动性，并且用于将数据包转发到定义域内的那些基站的路由器。 域定义为包含具有多个基站的子网。 移动设备使用基站来附加到诸如因特网的基于分组的网络的有线部分，并且与对应节点交换分组。 从通信节点发送到移动设备的分组具有对应于移动设备的分组目的地地址。 移动设备在其被加电并且经由给定域内的任何基站连接到因特网的时间内保留该地址。 基于主机的路由用于在单个域内的路由器上更新与移动设备相对应的路由表条目。 通过路径设置方案建立和更新路由表条目，以便通过域路由器和基站传送去往移动设备的分组沿着适当的建立路径，而不管移动设备通过哪个域基站。 路径设置方案利用上电，刷新和切换路径建立消息来维护路由器接口和路由表条目的包地址之间的适当关系。

公开(公告)号：US06496505B2

公开(公告)日：2002-12-17

申请号：US09210487

申请日：1998-12-11

申请人： Thomas F. La Porta ,  Ramachandran Ramjee ,  Kannan Varadhan

发明人： Thomas F. La Porta ,  Ramachandran Ramjee ,  Kannan Varadhan

IPC分类号： H04L1228

CPC分类号： H04W8/085 ,  H04L29/06 ,  H04W8/26 ,  H04W80/04

摘要： A tunneling optimization is described in which packets are forwarded from a home agent to a mobile device by co-locating a foreign agent corresponding to a mobile device at the mobile device. When a mobile device acquires a new foreign agent, the mobile device notifies the home agent as to the corresponding foreign agent address. A packet received at the home agent having the mobile device as a packet header destination address is parsed and the foreign agent address is substituted for the mobile device address, and the packet is forwarded to the foreign agent. The foreign agent, upon receiving the packet, removes the foreign agent address and replaces the mobile device address as the packet header destination address. The packet is then forwarded to the mobile device.

摘要翻译： 描述了隧道优化，其中通过在移动设备处共同定位对应于移动设备的外部代理，将分组从归属代理转发到移动设备。 当移动设备获取新的外部代理时，移动设备通知归属代理关于相应的外部代理地址。 解析在归属代理处接收到的具有移动设备作为分组报头目的地地址的分组，并且将外部代理地址替换为移动设备地址，并将分组转发给外部代理。 外部代理在接收到分组后，移除外部代理地址，并将移动设备地址替换为分组头目的地址。 然后将数据包转发到移动设备。

公开(公告)号：US07120453B2

公开(公告)日：2006-10-10

申请号：US09837809

申请日：2001-04-18

申请人： Thomas F. La Porta ,  Li Li ,  Ramachandran Ramjee

发明人： Thomas F. La Porta ,  Li Li ,  Ramachandran Ramjee

IPC分类号： H04Q7/20

CPC分类号： H04W68/00 ,  Y02D70/1224 ,  Y02D70/142 ,  Y02D70/23

摘要： Base stations on an Internet protocol (IP) network define a number of paging areas. An IP mobile host assumes one of (i) an active state, wherein the host informs other network nodes of a change in its point of attachment from one base station to another, and (ii) a standby state wherein the host informs other nodes only when a new point of attachment is a base station of a different paging area from a last point of attachment, thus conserving power at the mobile host. When data on the network is addressed to a standby mobile host, a page request is directed to a base station(s) in the host's current paging area for transmission. The host enters the active state and transmits a page response which is received by a base station in the current paging area, and network routing information for the host is updated accordingly.

公开(公告)号：US6081715A

公开(公告)日：2000-06-27

申请号：US819929

申请日：1997-03-18

申请人： Thomas F. La Porta ,  Ramachandran Ramjee ,  Malathi Veeraraghavan

发明人： Thomas F. La Porta ,  Ramachandran Ramjee ,  Malathi Veeraraghavan

IPC分类号： H04M3/00 ,  H04L12/56 ,  H04Q11/04 ,  H04W8/04 ,  H04W8/08 ,  H04W36/12 ,  H04Q7/20 ,  H04Q7/22

CPC分类号： H04W8/04 ,  H04Q11/0478 ,  H04L2012/5629 ,  H04W36/12 ,  H04W8/08

摘要： A system for distributed control in wireless cellular and personal communication systems includes separate servers for performing call control and connection control functions, thereby obviating the need for a mobile switching or other switch to be anchored for the duration of a call. During a registration procedure, visiting location servers track only roaming mobiles, rather than tracking both roaming mobiles as well as mobiles located in their home network. Direct signalling links between servers and base stations, or other servers, located in different networks allow roaming mobiles to contact their home networks for service at all times, thereby obviating the need for passing signalling information for mobiles when they are not involved in a call. The use of multicast signalling with asynchronous transfer mode switches, permits specified channel control functions to take place concurrently in channel servers associated with base station and switches that form a segment of the route for a call. Similarly, specified call control functions are performed concurrently with mobile location functions, thereby decreasing the delays in setting up a call.

摘要翻译： 用于无线蜂窝和个人通信系统中的分布式控制的系统包括用于执行呼叫控制和连接控制功能的单独的服务器，从而避免了在呼叫期间锚定移动交换机或其他交换机的需要。 在注册过程中，访问位置服务器只跟踪漫游手机，而不是跟踪漫游手机以及位于其家庭网络中的手机。 位于不同网络中的服务器和基站或其他服务器之间的直接信令链路允许漫游移动设备随时联系他们的家庭网络进行服务，从而避免了在移动台不参与呼叫时传递信令信息的需要。 使用具有异步传输模式交换机的多播信令允许指定的信道控制功能同时发生在与基站和交换机相关联的信道服务器中，所述基站和交换机形成用于呼叫的路由的一部分。 类似地，指定的呼叫控制功能与移动定位功能同时执行，从而减少建立呼叫的延迟。

公开(公告)号：US6085086A

公开(公告)日：2000-07-04

申请号：US884105

申请日：1997-06-27

申请人： Thomas F. La Porta ,  Ramachandran Ramjee ,  Malathi Veeraraghavan

发明人： Thomas F. La Porta ,  Ramachandran Ramjee ,  Malathi Veeraraghavan

IPC分类号： H04L29/06 ,  H04W28/16 ,  H04W36/00 ,  H04W76/04 ,  H04W88/18 ,  H04Q7/20

CPC分类号： H04W76/04 ,  G06F9/4856 ,  H04W28/16 ,  H04W36/0011 ,  H04W88/182

摘要： The present invention is a user process that resides in network nodes to act as an agent for mobile terminals in, for example, PCS environments. The user process handles negotiation and complex signaling functions for the user, thus reducing the amount of signaling traffic that must travel over the valuable air interface. To achieve low call establishment times the user process is migrated as user move. Three embodiment is adapted to enable data sizes which are to be transferred to be optimized, leading to low overhead. This approach also provides flexibility when migrating across heterogeneous environments. A second alternative embodiment may be advantageously utilized when a program is compute intensive and asynchronous migration is essential. The third embodiment provides high reliability in the form of checkpointing, but incurs a high migration delay and has high memory requirement for network processors.

摘要翻译： 本发明是驻留在网络节点中以用作例如PCS环境中的移动终端的代理的用户进程。 用户进程处理用户的协商和复杂的信令功能，从而减少必须在有价值的空中接口上传播的信令流量。 为了实现低呼叫建立时间，用户进程在用户移动时进行迁移。 三个实施例适于使要传输的数据大小被优化，导致低开销。 这种方法在跨异构环境迁移时也提供了灵活性。 当程序计算密集且异步迁移至关重要时，可以有利地利用第二替代实施例。 第三实施例以检查点的形式提供高可靠性，但是引起高的迁移延迟并且对于网络处理器具有高的存储器要求。

公开(公告)号：US06434134B1

公开(公告)日：2002-08-13

申请号：US09210341

申请日：1998-12-11

申请人： Thomas F. La Porta ,  Ramachandran Ramjee

发明人： Thomas F. La Porta ,  Ramachandran Ramjee

IPC分类号： H04J324

CPC分类号： H04L61/2015 ,  H04L29/12216 ,  H04L29/12301 ,  H04L29/12311 ,  H04L29/12801 ,  H04L61/2076 ,  H04L61/2084 ,  H04L61/6004 ,  H04W8/26 ,  H04W36/0011 ,  H04W80/04 ,  Y02D70/00

摘要： The number of packet routing addresses utilized within a wired subnet offering wireless services via subnet base stations is reduced by assigning a packet routing address to a wireless device accessing a wired subnet upon power up of the wireless device. A Dynamic Host Configuration Protocol (DHCP) server is utilized to assign the packet routing addresses, and supplies addresses either directly or indirectly via a node acting as a DHCP relay for a DHCP server. If the assigned packet routing address is a care-of address for a foreign domain, the address is released upon wireless device power down or upon handoff of the wireless device to a new domain. If the assigned packet routing address is an address for the wireless device within a home domain, the address is released upon wireless device power down.

摘要翻译： 通过在无线设备上电时向无线设备访问有线子网分配分组路由地址来减少通过子网基站提供无线服务的有线子网内所使用的分组路由地址的数量。 使用动态主机配置协议（DHCP）服务器来分配分组路由地址，并且通过作为DHCP服务器的DHCP中继的节点直接或间接地提供地址。 如果分配的分组路由地址是外部域的转交地址，则在无线设备断电或无线设备切换到新域时释放该地址。 如果所分配的分组路由地址是归属域内的无线设备的地址，则在无线设备断电时释放该地址。