公开(公告)号：US07995557B2

公开(公告)日：2011-08-09

申请号：US11078247

申请日：2005-03-11

Applicant: San-Qi Li ,  Mathew C. Perry ,  Chen Cao ,  Ya-Nan Long

Inventor： San-Qi Li ,  Mathew C. Perry ,  Chen Cao ,  Ya-Nan Long

IPC: H04L12/66 ,  G08C15/00

CPC classification number: H04L45/00 ,  H04L41/5087 ,  H04L43/08 ,  H04L43/0829 ,  H04L43/0852 ,  H04L43/087 ,  H04L43/50 ,  H04L65/80

Abstract: A method of measuring network quality for VoIP calls comprises setting up a test call from a local IP endpoint to a remote IP endpoint reachable by a logical trunk group associated with the local IP endpoint, receiving statistical data regarding the test call, tearing down the test call, processing the statistical data and generating measurement results, and routing a VoIP call using a route selected based at least in part on the measurement results.

Abstract translation: 测量VoIP呼叫的网络质量的方法包括建立从本地IP端点到由与本地IP端点相关联的逻辑中继组可达的远程IP端点的测试呼叫，接收关于测试呼叫的统计数据，拆除测试 呼叫，处理统计数据并产生测量结果，以及使用至少部分地基于测量结果选择的路由来路由VoIP呼叫。

公开(公告)号：US20080279201A1

公开(公告)日：2008-11-13

申请号：US11961658

申请日：2007-12-20

Applicant: David Z. Lu ,  Edward Y. Qian ,  Rupert Zhu ,  San-Qi Li

Inventor： David Z. Lu ,  Edward Y. Qian ,  Rupert Zhu ,  San-Qi Li

IPC: H04L12/28

CPC classification number: H04L45/00 ,  H04L29/12783 ,  H04L45/34 ,  H04L45/72 ,  H04L45/748 ,  H04L61/35 ,  H04L65/104 ,  H04L65/1069

Abstract: The subject matter described herein includes methods, systems, and computer program products for source-aware IP routing at a media gateway. According to one aspect, a method for source-aware IP routing at a media gateway is provided. The method includes providing a packet including a layer 3 source address and a layer 3 destination address at a media gateway having a source-aware routing table. Using the destination address included in the packet, at least one entry corresponding to the destination address is located in the source-aware routing table, where the located entry contains at least a portion of a source IP address, at least a portion of a destination IP address and routing information including an interface identifier and a next hop identifier. From among the at least one located entry corresponding to the destination IP address information, at least one entry corresponding to the source IP address included in the packet is located. Based on the routing information located in the routing table, the packet is routed to the destination.

Abstract translation: 本文描述的主题包括用于媒体网关处的源感知IP路由的方法，系统和计算机程序产品。 根据一个方面，提供了一种在媒体网关处的源感知IP路由的方法。 该方法包括在具有源感知路由表的媒体网关处提供包括第3层源地址和第3层目的地址的分组。 使用包含在包中的目的地地址，与目的地地址相对应的至少一个条目位于源感知路由表中，其中所述定位条目包含源IP地址的至少一部分，目的地的至少一部分 IP地址和路由信息，包括接口标识符和下一跳标识符。 从与目的地IP地址信息相对应的至少一个位置条目中，定位与分组中包含的源IP地址对应的至少一个条目。 基于位于路由表中的路由信息​​，数据包被路由到目的地。

公开(公告)号：US08681776B2

公开(公告)日：2014-03-25

申请号：US11580224

申请日：2006-10-12

Applicant: David Z. Lu ,  San-Qi Li

Inventor： David Z. Lu ,  San-Qi Li

IPC: H04L12/66

CPC classification number: H04L67/1097 ,  H04L45/7453 ,  H04L65/103 ,  H04L65/605 ,  H04L65/608 ,  H04L67/06

Abstract: The subject matter described herein includes methods, systems, and computer program products for storing communication session information at a network interface module. One method described herein includes receiving a plurality of RTCP packets associated with a communication session at a network interface module. RTCP information is extracted from at least one of the packets. The extracted RTCP information is stored in memory local to the network interface module.

Abstract translation: 本文描述的主题包括用于在网络接口模块处存储通信会话信息的方法，系统和计算机程序产品。 本文描述的一种方法包括在网络接口模块处接收与通信会话相关联的多个RTCP分组。 从至少一个分组提取RTCP信息。 提取的RTCP信息存储在网络接口模块本地的存储器中。

公开(公告)号：US07940660B2

公开(公告)日：2011-05-10

申请号：US10943513

申请日：2004-09-17

Applicant: Rupert Zhu ,  David Z. Lu ,  San-Qi Li ,  Edward Y. Qian

Inventor： Rupert Zhu ,  David Z. Lu ,  San-Qi Li ,  Edward Y. Qian

IPC: G01R31/08

CPC classification number: H04L65/104 ,  H04L29/06027 ,  H04L45/00 ,  H04L45/22 ,  H04L65/103 ,  H04L65/1043

Abstract: Method, systems, and computer program products for voice over IP (VoIP) traffic engineering and path resilience using media gateway and associated next-hop routers are provided. In one example, a media gateway includes multiple media processing hosts and a multiple network interfaces separate from the media processing hosts. At least one of the media processing hosts is reachable via at least two of the network interfaces. Next-hop routers associated with the network interfaces advertise reachability information regarding the media processing hosts to routers in the network. The next-hop routers also participate in network routing protocols to form multiple paths between the media gateway and a remote media gateway. Costs may be assigned to associations between the media processing hosts and the next-hop routers for traffic engineering purposes.

Abstract translation: 提供了基于IP语音（VoIP）流量工程和使用媒体网关和相关联的下一跳路由器的路径恢复能力的方法，系统和计算机程序产品。 在一个示例中，媒体网关包括多个媒体处理主机和与媒体处理主机分开的多个网络接口。 至少一个媒体处理主机可通过至少两个网络接口访问。 与网络接口相关联的下一跳路由器将关于媒体处理主机的可达性信息广播到网络中的路由器。 下一跳路由器还参与网络路由协议，以在媒体网关和远程媒体网关之间形成多条路径。 可以将成本分配给媒体处理主机和下一跳路由器之间的用于流量工程目的的关联。

公开(公告)号：US07006489B2

公开(公告)日：2006-02-28

申请号：US09792265

申请日：2001-02-23

Applicant: San-Qi Li ,  Stephen R. Barnes ,  Jingdong Ye

Inventor： San-Qi Li ,  Stephen R. Barnes ,  Jingdong Ye

IPC: H04L12/66

CPC classification number: H04L49/606 ,  H04L12/6402 ,  H04L2012/5656 ,  H04L2012/5667 ,  H04L2012/5671

Abstract: A switching system includes at least one packet processing circuit interfacing with at least one packet transmission link. The switching system further includes a switch fabric coupled to the at least one packet processing circuit, whereby the switch fabric is operable to switch between channels receiving and transmitting data over the at least one packet transmission link and channels receiving and transmitting data over at least one non-packet transmission link interfaced by the switch fabric.

Abstract translation: 交换系统包括与至少一个分组传输链路接口的至少一个分组处理电路。 交换系统还包括耦合到所述至少一个分组处理电路的交换结构，由此交换结构可操作以在通过所述至少一个分组传输链路接收和发送数据的信道之间切换，以及在至少一个分组传输链路上接收和发送数据的信道 由交换结构接口的非分组传输链路。

公开(公告)号：US20050073998A1

公开(公告)日：2005-04-07

申请号：US10943513

申请日：2004-09-17

Applicant: Rupert Zhu ,  David Lu ,  San-Qi Li ,  Edward Qian

Inventor： Rupert Zhu ,  David Lu ,  San-Qi Li ,  Edward Qian

IPC: H04J3/14 ,  H04L1/22 ,  H04L12/28 ,  H04L12/56 ,  H04L12/66 ,  H04L29/06

CPC classification number: H04L65/104 ,  H04L29/06027 ,  H04L45/00 ,  H04L45/22 ,  H04L65/103 ,  H04L65/1043

Abstract: Method, systems, and computer program products for voice over IP (VoIP) traffic engineering and path resilience using media gateway and associated next-hop routers are provided. In one example, a media gateway includes multiple media processing hosts and a multiple network interfaces separate from the media processing hosts. At least one of the media processing hosts is reachable via at least two of the network interfaces. Next-hop routers associated with the network interfaces advertise reachability information regarding the media processing hosts to routers in the network. The next-hop routers also participate in network routing protocols to form multiple paths between the media gateway and a remote media gateway. Costs may be assigned to associations between the media processing hosts and the next-hop routers for traffic engineering purposes.

Abstract translation: 提供了基于IP语音（VoIP）流量工程和使用媒体网关和相关联的下一跳路由器的路径恢复能力的方法，系统和计算机程序产品。 在一个示例中，媒体网关包括多个媒体处理主机和与媒体处理主机分开的多个网络接口。 至少一个媒体处理主机可通过至少两个网络接口访问。 与网络接口相关联的下一跳路由器将关于媒体处理主机的可达性信息广播到网络中的路由器。 下一跳路由器还参与网络路由协议，以在媒体网关和远程媒体网关之间形成多条路径。 可以将成本分配给媒体处理主机和下一跳路由器之间的用于流量工程目的的关联。

公开(公告)号：US20050025052A1

公开(公告)日：2005-02-03

申请号：US10921914

申请日：2004-08-20

Applicant: Yongdong Zhao ,  San-Qi Li ,  Sam Sigarto

Inventor： Yongdong Zhao ,  San-Qi Li ,  Sam Sigarto

IPC: H04L12/56 ,  H04L1/00

CPC classification number: H04L12/5602 ,  H04L2012/5635

Abstract: An adjustable bit rate (ABR) feedback control scheme is provided where the effects of multiloop delays and high priority traffic transmission are built into the control model. The data traffic is filtered by a low pass filter. Then, the low frequency bandwidth of the filtered traffic is measured and compared to a predetermined threshold. If the measured value exceeds the threshold, the ABR traffic flow is reduced. If the measured value is less than the threshold, the ABR traffic flow is increased. In addition, a General Prediction Control (GPC) method may be applied to the control model for optimal performance. An object of the invention is to minimize the unused link capacity subject to no congestion, where the ABR traffic is adapted to the low frequency variation of high priority traffic flow for high efficiency.

Abstract translation: 提供了一种可调节比特率（ABR）反馈控制方案，其中多循环延迟和高优先级流量传输的影响内置在控制模型中。 数据流量由低通滤波器滤波。 然后，测量滤波业务的低频带宽并与预定阈值进行比较。 如果测量值超过阈值，ABR流量就会减少。 如果测量值小于阈值，则ABR业务流量增加。 此外，通用预测控制（GPC）方法可以应用于控制模型以获得最佳性能。 本发明的一个目的是最大限度地减少没有拥塞的未使用的链路容量，其中ABR业务适用于高效率的高优先级业务流的低频变化。

公开(公告)号：US20100214927A1

公开(公告)日：2010-08-26

申请号：US12775442

申请日：2010-05-06

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

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

IPC: H04L12/56

CPC classification number: H04L45/3065 ,  H04L45/12

Abstract: 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.

Abstract translation: 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：US07424025B2

公开(公告)日：2008-09-09

申请号：US10676233

申请日：2003-10-01

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

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

IPC: H04L12/66

CPC classification number: H04M3/2263 ,  H04L65/1043 ,  H04M7/121 ,  H04M7/1255

Abstract: 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.

Abstract translation: 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：US07380011B2

公开(公告)日：2008-05-27

申请号：US10676240

申请日：2003-10-01

Applicant: San-Qi Li ,  Weijun Lee ,  David Z. Lu

Inventor： San-Qi Li ,  Weijun Lee ,  David Z. Lu

IPC: G06F15/16

CPC classification number: H04L29/12009 ,  H04L29/1233 ,  H04L29/12509 ,  H04L61/2567 ,  H04L63/0236 ,  H04L63/0254 ,  H04L63/029 ,  H04L65/1023

Abstract: Methods and systems for per-session NAT learning and firewall filtering are disclosed. Media packets associated with a call/session are received and processed at a media gateway. For the first few received media packets associated with a session, the media gateway uses various unique methods to learn the actual source IP address and UDP port assigned to the remote communication terminal by its customer-premises Network Address Translators (NATs) to the media flows of the current session. After the remote IP and UDP are learned, the media gateway reconfigures its firewall filtering function to check both the dynamically learned remote IP and UDP and the locally assigned IP and UDP of the current session. The per-session NAT learning function removes reachability issues in VoIP deployment, and the per-session firewall filtering function enhances security protection in VoIP deployment.

Abstract translation: 披露了每会话NAT学习和防火墙过滤的方法和系统。 与呼叫/会话相关联的媒体分组在媒体网关处被接收和处理。 对于与会话相关联的前几个接收到的媒体分组，媒体网关使用各种独特的方法来了解其客户端网络地址转换器（NAT）分配给远程通信终端的实际源IP地址和UDP端口到媒体流 的当前会话。 在学习到远程IP和UDP后，媒体网关重新配置其防火墙过滤功能，以检查动态学习的远程IP和UDP以及当前会话的本地分配的IP和UDP。 每会话NAT学习功能消除了VoIP部署中的可达性问题，每会话防火墙过滤功能增强了VoIP部署中的安全保护。