公开(公告)号：US07969890B2

公开(公告)日：2011-06-28

申请号：US12775442

申请日：2010-05-06

申请人： Edward Y. Qian ,  San-Qi Li ,  David Z. Lu ,  Rupert Zhu ,  Yen Shei

发明人： Edward Y. Qian ,  San-Qi Li ,  David Z. Lu ,  Rupert Zhu ,  Yen Shei

IPC分类号： G01R31/08

CPC分类号： H04L45/3065 ,  H04L45/12

摘要： The subject matter described herein includes methods, systems, and computer program products for load balanced and symmetric SPF path computations for VoIP traffic engineering. One method includes advertising an output interface cost in a first direction over a first network segment between a source IP device and a destination IP device that is different from an output interface cost in advertised in a second direction over the first network segment. A plurality of available network paths between the source IP device and the destination IP device is identified. A path cost is calculated for each of the available network paths from the source IP device to the destination IP device. Calculating a path cost includes, for paths that include the first network segment, substituting the output interface cost advertised in the first direction with the output interface cost advertised in the second direction. The path costs are ranked based on the calculated costs. A lowest cost path is selected from the ranked paths. Both directions of a media session are assigned to the lowest cost path.

摘要翻译： 本文描述的主题包括用于VoIP流量工程的负载平衡和对称SPF路径计算的方法，系统和计算机程序产品。 一种方法包括在源IP设备和目的地IP设备之间的第一网段上向第一方向广告输出接口成本，所述第一网段与在第一网段上沿第二方向通告的输出接口成本不同。 识别源IP设备和目的IP设备之间的多个可用网络路径。 针对从源IP设备到目标IP设备的每个可用网络路径计算路径开销。 对于包含第一网段的路径，计算路径开销包括以第二方向通告的输出接口成本代替在第一方向上发布的输出接口成本。 路径成本根据计算的成本进行排名。 从排名的路径中选择最低成本路径。 媒体会话的两个方向被分配到最低成本路径。

公开(公告)号：US08040899B2

公开(公告)日：2011-10-18

申请号：US11139019

申请日：2005-05-26

申请人： Yen Shei ,  David Z. Lu

发明人： Yen Shei ,  David Z. Lu

IPC分类号： H04L12/28

CPC分类号： H04L49/552 ,  H04L49/201 ,  H04L49/206 ,  H04L49/208 ,  H04L49/351 ,  H04L49/354 ,  H04L49/557

摘要： Methods, systems, and computer program products for implementing automatic protection switching for media packets, such as ATM cells or IP packets that carry media content, in a device that includes an Ethernet switching fabric are disclosed. According to one method, first and second packet network interfaces of the device are configured to function as working and protection APS interfaces. At least one of a media processing resource and an Ethernet switch fabric of the device are configured to replicate egress media packets from the media processing resource to the working and protection APS interfaces. Egress media packets from the media processing resource are forwarded to the working and protection APS interfaces via the switch fabric. Ingress media packets received at the working APS interface are forwarded to the media processing resource via the Ethernet switch fabric. Media packets received at the protection APS interface are discarded.

摘要翻译： 公开了在包括以太网交换结构的设备中实现用于媒体分组的自动保护倒换的方法，系统和计算机程序产品，例如携带媒体内容的ATM信元或IP分组。 根据一种方法，设备的第一和第二分组网络接口被配置为用作工作和保护APS接口。 设备的媒体处理资源和以太网交换结构中的至少一个被配置为将出口媒体分组从媒体处理资源复制到工作和保护APS接口。 来自媒体处理资源的出口媒体报文通过交换矩阵转发到工作和保护APS接口。 在工作APS接口接收到的入口媒体报文通过以太网交换矩阵转发给媒体处理资源。 在保护APS接口处接收的媒体报文被丢弃。

公开(公告)号：US07940772B2

公开(公告)日：2011-05-10

申请号：US11138990

申请日：2005-05-26

申请人： Jinshui Liu ,  Weisheng Chen ,  Eric Chien-Chung Chang ,  Yen Shei ,  David Z. Lu

发明人： Jinshui Liu ,  Weisheng Chen ,  Eric Chien-Chung Chang ,  Yen Shei ,  David Z. Lu

IPC分类号： H04L12/28

CPC分类号： H04L12/5601 ,  H04L49/3009 ,  H04L49/351 ,  H04L2012/5618 ,  H04L2012/5665

摘要： The subject matter described herein includes methods, systems, and computer program products for transporting ATM cells in a device having an Ethernet switching fabric. According to one method, at least one ingress ATM cell is received at an ATM network interface of a device having an Ethernet switching fabric. Next, the connection associated with which the ingress ATM cell is identified. The ATM cell is encapsulated in Ethernet frame addressed to a media processing resource associated with the connection. The Ethernet frame is forwarded to the media processing resource across an Ethernet switching fabric.

摘要翻译： 本文描述的主题包括用于在具有以太网交换结构的设备中传送ATM信元的方法，系统和计算机程序产品。 根据一种方法，在具有以太网交换结构的设备的ATM网络接口处接收至少一个入口ATM信元。 接下来，与入口ATM信元相关联的连接被识别。 ATM信元被封装在以太网帧中，寻址到与该连接相关联的媒体处理资源。 以太网帧通过以太网交换结构转发到媒体处理资源。

公开(公告)号：US20100214927A1

公开(公告)日：2010-08-26

申请号：US12775442

申请日：2010-05-06

申请人： Edward Y. Qian ,  San-Qi Li ,  David Z. Lu ,  Rupert Zhu ,  Yen Shei

发明人： Edward Y. Qian ,  San-Qi Li ,  David Z. Lu ,  Rupert Zhu ,  Yen Shei

IPC分类号： H04L12/56

CPC分类号： H04L45/3065 ,  H04L45/12

摘要： The subject matter described herein includes methods, systems, and computer program products for load balanced and symmetric SPF path computations for VoIP traffic engineering. One method includes advertising an output interface cost in a first direction over a first network segment between a source IP device and a destination IP device that is different from an output interface cost in advertised in a second direction over the first network segment. A plurality of available network paths between the source IP device and the destination IP device is identified. A path cost is calculated for each of the available network paths from the source IP device to the destination IP device. Calculating a path cost includes, for paths that include the first network segment, substituting the output interface cost advertised in the first direction with the output interface cost advertised in the second direction. The path costs are ranked based on the calculated costs. A lowest cost path is selected from the ranked paths. Both directions of a media session are assigned to the lowest cost path.

摘要翻译： 本文描述的主题包括用于VoIP流量工程的负载平衡和对称SPF路径计算的方法，系统和计算机程序产品。 一种方法包括在源IP设备和目的地IP设备之间的第一网段上向第一方向广告输出接口成本，所述第一网段与在第一网段上沿第二方向通告的输出接口成本不同。 识别源IP设备和目的IP设备之间的多个可用网络路径。 针对从源IP设备到目标IP设备的每个可用网络路径计算路径开销。 对于包含第一网段的路径，计算路径开销包括以第二方向通告的输出接口成本代替在第一方向上发布的输出接口成本。 路径成本根据计算的成本进行排名。 从排名的路径中选择最低成本路径。 媒体会话的两个方向被分配到最低成本路径。

公开(公告)号：US07570594B2

公开(公告)日：2009-08-04

申请号：US11545788

申请日：2006-10-10

申请人： Rupert Zhu ,  David Z. Lu ,  San-qi Li ,  Edward Y. Qian ,  Yen Shei

发明人： Rupert Zhu ,  David Z. Lu ,  San-qi Li ,  Edward Y. Qian ,  Yen Shei

IPC分类号： H04J1/16

CPC分类号： H04L45/24 ,  H04L45/12 ,  H04L45/124 ,  H04L45/28

摘要： Methods, systems, and computer program products for multipath Shortest-Path-First (SPF) computations and distance-based interface selection for VoIP traffic are disclosed. According to one method, a multi-path router instance associated with a plurality of network interfaces in a source IP device is provided. A cost is assigned to each of a plurality of internal segments between the multi-path router instance and the network interfaces associated with the multi-path router instance. An aggregate cost is calculated for each of a plurality of traffic paths originating at the multi-path router instance in the source IP device and extending through each of the network interfaces associated with the multi-path router instance to a destination IP device in the network. A list of IP paths is generated, and the paths in the list are ranked based on the calculated cost. Traffic is sent from the source IP device over at least one of the paths in the list. The path costs and rankings are updated in response to segment cost changes.

摘要翻译： 用于多路径的方法，系统和计算机程序产品公开了针对VoIP业务的最短路径优先（SPF）计算和基于距离的接口选择。 根据一种方法，提供与源IP设备中的多个网络接口相关联的多路径路由器实例。 在多路径路由器实例和与多路径路由器实例相关联的网络接口之间的多个内部段中的每一个分配成本。 为源IP设备中的多路径路由器实例发起的多个业务路径中的每一个计算总成本，并且通过与多路径路由器实例相关联的每个网络接口延伸到网络中的目的地IP设备 。 生成IP路径列表，并根据计算出的成本对列表中的路径进行排名。 通过列表中的至少一个路径从源IP设备发送流量。 路径成本和排名根据分部成本变化进行更新。

公开(公告)号：US07424025B2

公开(公告)日：2008-09-09

申请号：US10676233

申请日：2003-10-01

申请人： Edward Y. Qian ,  David Z. Lu ,  San-Qi Li ,  Yen Shei ,  Weijun Lee

发明人： Edward Y. Qian ,  David Z. Lu ,  San-Qi Li ,  Yen Shei ,  Weijun Lee

IPC分类号： H04L12/66

CPC分类号： H04M3/2263 ,  H04L65/1043 ,  H04M7/121 ,  H04M7/1255

摘要： Methods and systems for per-session dynamic management of media gateway resources are disclosed. According to one method, the logical and physical resources in a media gateway are divided and dynamically managed at the Transport Layer (i.e. OBI Layer 4), which results in finer granularity than managing such resources statically at the Data Link Layer (i.e. OBI Layer 2) or Network Layer (i.e. OBI Layer 3). Voice-processing resources provided by voice server cards may be pooled into a common pool available to all external networks. For each new call/session, the dynamic resource manager of the media gateway dynamically allocates a voice chip from the pooled voice processing resources, and assigns a logical resource identifier (e.g. a local IP and local UDP pair) to the session. When a network interface card receives incoming voice packets, it checks the destination IP and UDP and optionally the source IP and UDP to find out, and forward voice packets to, the voice chip assigned to the session.

摘要翻译： 披露了媒体网关资源的每会话动态管理的方法和系统。 根据一种方法，媒体网关中的逻辑和物理资源在传输层（即OBI层4）处被划分和动态管理，这导致比在数据链路层静态地管理这样的资源更精细的粒度（即，OBI层2 ）或网络层（即OBI层3）。 由语音服务器卡提供的语音处理资源可以汇集到可用于所有外部网络的公共池中。 对于每个新的呼叫/会话，媒体网关的动态资源管理器从池化的语音处理资源动态地分配语音芯片，并且向会话分配逻辑资源标识符（例如本地IP和本地UDP对）。 当网络接口卡接收到传入的语音数据包时，它检查目标IP和UDP以及可选的源IP和UDP来查找分配给会话的语音芯片的语音数据包。

公开(公告)号：US07715403B2

公开(公告)日：2010-05-11

申请号：US11594568

申请日：2006-11-08

申请人： Edward Y. Qian ,  San-Qi Li ,  David Z. Lu ,  Rupert Zhu ,  Yen Shei

发明人： Edward Y. Qian ,  San-Qi Li ,  David Z. Lu ,  Rupert Zhu ,  Yen Shei

IPC分类号： H04L12/28

CPC分类号： H04L45/3065 ,  H04L45/12

摘要： The subject matter described herein includes methods, systems, and computer program products for load balanced and symmetric SPF path computations for VoIP traffic engineering. One method includes advertising an output interface cost in a first direction over a first network segment between a source IP device and a destination IP device that is different from an output interface cost in advertised in a second direction over the first network segment. A plurality of available network paths between the source IP device and the destination IP device is identified. A path cost is calculated for each of the available network paths from the source IP device to the destination IP device. Calculating a path cost includes, for paths that include the first network segment, substituting the output interface cost advertised in the first direction with the output interface cost advertised in the second direction. The path costs are ranked based on the calculated costs. A lowest cost path is selected from the ranked paths. Both directions of a media session are assigned to the lowest cost path.

摘要翻译： 本文描述的主题包括用于VoIP流量工程的负载平衡和对称SPF路径计算的方法，系统和计算机程序产品。 一种方法包括在源IP设备和目的地IP设备之间的第一网段上向第一方向广告输出接口成本，所述第一网段与在第一网段上沿第二方向通告的输出接口成本不同。 识别源IP设备和目的IP设备之间的多个可用网络路径。 针对从源IP设备到目标IP设备的每个可用网络路径计算路径开销。 对于包含第一网段的路径，计算路径开销包括以第二方向通告的输出接口成本代替在第一方向上发布的输出接口成本。 路径成本根据计算的成本进行排名。 从排名的路径中选择最低成本路径。 媒体会话的两个方向被分配到最低成本路径。

公开(公告)号：US07492767B2

公开(公告)日：2009-02-17

申请号：US11495990

申请日：2006-07-28

申请人： David Z. Lu ,  San-Qi Li ,  Yen Shei

发明人： David Z. Lu ,  San-Qi Li ,  Yen Shei

IPC分类号： H04L12/28

CPC分类号： H04L63/0236 ,  H04L29/12009 ,  H04L29/1233 ,  H04L61/25 ,  H04L63/0254 ,  H04L63/029 ,  H04L65/103

摘要： Methods, systems, and computer program products for throttling network address translation (NAT) learning traffic in a voice over IP device are disclosed. According to one method, a plurality of media packets associated with a media session are received at a voice over IP device. A NAT learning throttling filter is applied to select the subset of the packets to be used for NAT learning and thereby limit the number of received media packets to be used for NAT learning. NAT learning is performed for the session using the packets selected by the NAT learning throttling filter.

摘要翻译： 公开了用于在IP语音设备上节流网络地址转换（NAT）学习流量的方法，系统和计算机程序产品。 根据一种方法，在IP设备上的语音接收与媒体会话相关联的多个媒体分组。 应用NAT学习调节过滤器选择要用于NAT学习的数据包的子集，从而限制用于NAT学习的接收到的媒体数据包的数量。 使用NAT学习限制滤波器选择的数据包，为会话执行NAT学习。

公开(公告)号：US20060268888A1

公开(公告)日：2006-11-30

申请号：US11138990

申请日：2005-05-26

申请人： Jinshui Liu ,  Weisheng Chen ,  Eric Chang ,  Yen Shei ,  David Lu

发明人： Jinshui Liu ,  Weisheng Chen ,  Eric Chang ,  Yen Shei ,  David Lu

IPC分类号： H04L12/56 ,  H04J3/16

CPC分类号： H04L12/5601 ,  H04L49/3009 ,  H04L49/351 ,  H04L2012/5618 ,  H04L2012/5665

摘要： The subject matter described herein includes methods, systems, and computer program products for transporting ATM cells in a device having an Ethernet switching fabric. According to one method, at least one ingress ATM cell is received at an ATM network interface of a device having an Ethernet switching fabric. Next, the connection associated with which the ingress ATM cell is identified. The ATM cell is encapsulated in Ethernet frame addressed to a media processing resource associated with the connection. The Ethernet frame is forwarded to the media processing resource across an Ethernet switching fabric.

摘要翻译： 本文描述的主题包括用于在具有以太网交换结构的设备中传送ATM信元的方法，系统和计算机程序产品。 根据一种方法，在具有以太网交换结构的设备的ATM网络接口处接收至少一个入口ATM信元。 接下来，与入口ATM信元相关联的连接被识别。 ATM信元被封装在以太网帧中，寻址到与该连接相关联的媒体处理资源。 以太网帧通过以太网交换结构转发到媒体处理资源。

公开(公告)号：US07864665B2

公开(公告)日：2011-01-04

申请号：US11015296

申请日：2004-12-17

申请人： Yen Shei ,  Christopher J. Ouellette ,  Samuel O. Perry

发明人： Yen Shei ,  Christopher J. Ouellette ,  Samuel O. Perry

IPC分类号： G01R31/08

CPC分类号： H04L65/1083 ,  H04L45/22 ,  H04L45/28 ,  H04L45/3065 ,  H04L69/40

摘要： Methods and systems for detecting IP route failure using a request-reply protocol, such as address resolution protocol (ARP), and for dynamically re-routing VoIP sessions in a VoIP device in response to failure of an IP route are disclosed. A plurality of IP routes are established between a first VoIP device and a second VoIP device. VoIP sessions are assigned to the IP routes. ARP is used to detect a failure of an IP route. In response to detecting a failure of at least one IP route, VoIP sessions are rerouted from the failed IP route to an alternate IP route.

摘要翻译： 公开了使用诸如地址解析协议（ARP）的请求回复协议来检测IP路由故障的方法和系统，并且响应于IP路由的故障在VoIP设备中动态地重新路由VoIP会话。 在第一VoIP设备和第二VoIP设备之间建立多条IP路由。 VoIP会话被分配给IP路由。 ARP用于检测IP路由的故障。 响应于检测到至少一个IP路由的故障，VoIP会话从故障IP路由重新路由到备用IP路由。