公开(公告)号：US20050074017A1

公开(公告)日：2005-04-07

申请号：US10676233

申请日：2003-10-01

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

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

IPC分类号： G06F20060101 ,  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. OSI Layer 4), which results in finer granularity than managing such resources statically at the Data Link Layer (i.e. OSI Layer 2) or Network Layer (i.e. OSI 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OSI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OSI层2 ）或网络层（即OSI第3层）。 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：US20070064613A1

公开(公告)日：2007-03-22

申请号：US11594568

申请日：2006-11-08

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

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

IPC分类号： H04J3/14 ,  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：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：US20060288114A1

公开(公告)日：2006-12-21

申请号：US11495990

申请日：2006-07-28

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

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

IPC分类号： G06F15/16

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.

公开(公告)号：US20050076108A1

公开(公告)日：2005-04-07

申请号：US10676240

申请日：2003-10-01

申请人： San-Qi Li ,  Weijun Lee ,  David Lu

发明人： San-Qi Li ,  Weijun Lee ,  David Lu

IPC分类号： G06F15/16 ,  G06F15/173 ,  H04B20060101 ,  H04L29/06 ,  H04L29/12

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

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20050073998A1

公开(公告)日：2005-04-07

申请号：US10943513

申请日：2004-09-17

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

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

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

CPC分类号： H04L65/104 ,  H04L29/06027 ,  H04L45/00 ,  H04L45/22 ,  H04L65/103 ,  H04L65/1043

摘要： 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.

摘要翻译： 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：US20050083844A1

公开(公告)日：2005-04-21

申请号：US10943275

申请日：2004-09-17

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

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

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

CPC分类号： H04L45/00 ,  H04L29/06027 ,  H04L41/0893 ,  H04L43/0852 ,  H04L45/04 ,  H04L45/123 ,  H04L45/22 ,  H04L45/64 ,  H04L65/103 ,  H04L65/104 ,  H04L65/1043

摘要： Methods and systems for providing voice over IP traffic engineering and path resilience using a network-aware media gateway are provided. In a media gateway, voice over IP hosts are assigned a first set of IP addresses. Network interfaces in the media gateway are assigned a second set of IP addresses that differ from the first set of IP addresses. Per-interface routers advertise reachability information from at least one of the voice over IP hosts via multiple interfaces and participate in network routing protocols to generate per interface routing tables. Voice over IP path lists may be generated based on the per interface routing tables. Internal costs may be assigned to the associations between the voice over IP hosts and the interfaces based on traffic engineering criteria.

摘要翻译： 提供了使用网络感知媒体网关来提供IP流量工程语音和路径恢复能力的方法和系统。 在媒体网关中，IP主机上的语音分配了第一组IP地址。 媒体网关中的网络接口被分配与第一组IP地址不同的第二组IP地址。 每接口路由器通过多个接口从至少一个IP语音主机发送可达性信息，并参与网络路由协议以生成每个接口路由表。 IP路由列表可以基于每个接口路由表生成。 可以根据流量工程标准将内部成本分配给IP语音主机和接口之间的关联。

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：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：US20060077963A1

公开(公告)日：2006-04-13

申请号：US11032592

申请日：2005-01-10

申请人： San-Qi Li ,  Yen Shei

发明人： San-Qi Li ,  Yen Shei

IPC分类号： H04L12/66

CPC分类号： H04L47/10 ,  H04L29/06027 ,  H04L41/0893 ,  H04L41/5009 ,  H04L41/5087 ,  H04L47/20 ,  H04L47/26 ,  H04L47/32 ,  H04L49/206 ,  H04L49/505 ,  H04L65/103 ,  H04L65/80

摘要： Methods and systems for per-session traffic rate policing in a media gateway include receiving voice over IP (VoIP) packets at a media gateway where it is determined whether each VoIP packet is associated with an existing VoIP session in the media gateway. A per-session traffic rate policing policy is applied to the packets associated with the existing sessions in the media gateway. In response to determining that a packet violates the per-session traffic rate policing policy, the packet is discarded.

摘要翻译： 媒体网关中每会话流速率监管的方法和系统包括在媒体网关处接收IP语音（VoIP）分组，确定每个VoIP分组是否与媒体网关中现有的VoIP会话相关联。 每个会话的流量速率监管策略被应用于与媒体网关中的现有会话相关联的分组。 响应于确定分组违反每会话流速率监管策略，丢弃该分组。