公开(公告)号：US11552895B2

公开(公告)日：2023-01-10

申请号：US17161281

申请日：2021-01-28

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Penn L. Pfautz ,  Huajin Jeng

IPC: H04L47/24 ,  H04L47/2441 ,  H04L47/2425 ,  H04L47/2483 ,  H04L47/62

Abstract: Methods, apparatus and articles of manufacture for advertising network layer reachability information specifying a quality of service for an identified network flow are disclosed. Example methods disclosed herein to specify quality of service for network flows include receiving network layer reachability information including a first quality of service class specified for a first network flow, the network layer reachability information having been advertised by a first network element that is to receive the first network flow. Such example methods can also include updating an incoming packet determined to belong to the first network flow to indicate that the incoming packet belongs to the first quality of service class, the incoming packet being received from a second network element. Such example methods can further include, after updating the incoming packet, routing the incoming packet towards the first network element.

公开(公告)号：US10320670B2

公开(公告)日：2019-06-11

申请号：US14970403

申请日：2015-12-15

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Han Q. Nguyen ,  Huajin Jeng ,  Tuan Duong ,  Kang Xi

IPC: H04L12/741 ,  H04L12/747

Abstract: A router may include a central processing unit-based line card storing a forwarding table that includes a first set of entries, a network processing unit-based line card storing a partial forwarding table that includes a second set of entries comprising a subset of the first set of entries, where the second set of entries comprises entries that are most utilized by a plurality of line cards of the router, and a route controller for updating the second set of entries to comprise the entries that are the most utilized. The network processing unit-based line card may forward a packet when an entry in the partial forwarding table matches the packet and may forward the packet to the central processing unit-based line card to forward the packet when there is no entry in the partial forwarding table of the network processing-unit based line card that matches the packet.

公开(公告)号：US09800421B2

公开(公告)日：2017-10-24

申请号：US14860261

申请日：2015-09-21

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Pravin Kumar Johri ,  Huajin Jeng ,  Samir Saad

IPC: H04L12/18 ,  H04L12/761

CPC classification number: H04L12/18 ,  H04L12/1854 ,  H04L45/16

Abstract: Example methods disclosed herein include registering a first leaf node to receive multicast data from a source via a first network node in response to receiving, from the first leaf node, a first message addressed to an anycast address, the anycast addressed being assigned to the first network node to associate the first network node with a second hierarchical level of a replication hierarchy. The disclosed example methods also include receiving the multicast data from a second network node associated with a first hierarchical level of the replication hierarchy. The disclosed example methods further include, after registering the first leaf node with the first network node, replicating the multicast data to generate copies of the multicast data to be transmitted via respective unicast paths to respective ones of a plurality of leaf nodes, including the first leaf node, registered with the first network node to receive the multicast data.

公开(公告)号：US09363268B2

公开(公告)日：2016-06-07

申请号：US14297952

申请日：2014-06-06

Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.

Inventor： Han Q. Nguyen ,  Huajin Jeng ,  Douglas M. Nortz

IPC: G06F7/04 ,  H04L29/06 ,  G06F21/10 ,  G06F21/60 ,  G06Q10/06 ,  H04L12/18

CPC classification number: H04L12/185 ,  G06F21/10 ,  G06F21/606 ,  G06Q10/06 ,  H04L12/1845 ,  H04L12/1886 ,  H04L63/10 ,  H04L63/107 ,  H04L63/20

Abstract: A content distribution network includes first and second controllers, and multicast enabled routers. The first controller is configured to select a multicast channel for distributing content, to determine that the content has a geographic restriction associated with a restricted area in the content distribution network, to link an exclusion policy for the content to the multicast channel while the multicast channel provides the content, and to deny a request for the content from a client system within the restricted area based on the exclusion policy. The second controller is configured to distribute the exclusion policy to the multicast enabled routers including a first router configured to store the exclusion policy, and to ignore a multicast join message from the client system within the restricted area based on the exclusion policy.

Abstract translation: 内容分发网络包括第一和第二控制器以及启用多播的路由器。 所述第一控制器被配置为选择用于分发内容的多播信道，以确定所述内容具有与所述内容分发网络中的受限区域相关联的地理限制，以将所述内容的排除策略链接到所述多播信道，而所述多播信道 提供内容，并且基于排除策略来拒绝来自限制区域内的客户端系统的内容的请求。 第二控制器被配置为将排除策略分发到启用多播的路由器，包括配置为存储排除策略的第一路由器，并且基于排除策略忽略来自限制区域内的客户端系统的多播加入消息。

公开(公告)号：US20160080264A1

公开(公告)日：2016-03-17

申请号：US14954535

申请日：2015-11-30

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Huajin Jeng ,  Pravin Kumar Johri ,  Han Nguyen ,  Samir Saad

IPC: H04L12/741 ,  H04L12/761 ,  H04L12/18 ,  H04L12/26 ,  H04L12/723

CPC classification number: H04L45/745 ,  H04L12/18 ,  H04L12/1836 ,  H04L43/10 ,  H04L45/16 ,  H04L45/50

Abstract: Methods, apparatus, and articles of manufacture to provide a multicast virtual private network (MVPN) are disclosed. An example method to transmit multicast data over a communication network includes: determining an upstream hop of a multicast transmission based on a received hierarchical ingress replication route; storing a downstream hop and the upstream hop of the multicast transmission in a multicast routing table; monitoring the multicast transmission occurring via an area border router; in response to detecting at least one of a) a threshold fan-out of the multicast transmission or b) a threshold data rate from a source of the multicast transmission, converting a logical topology of the multicast transmission; and in response to receiving a multicast data packet of the multicast transmission, replicating the multicast data packet with the processor based on the downstream hop.

Abstract translation: 公开了提供组播虚拟专用网（MVPN）的方法，装置和制造。 一种通过通信网络传输组播数据的示例方法包括：基于接收到的分级入侵复制路由确定组播传输的上行跳数; 将组播传输的下游跳和上游跳存储在组播路由表中; 监视通过区域边界路由器发生的组播传输; 响应于检测到a）所述多播传输的阈值扇出中的至少一个或b）来自所述多播传输源的阈值数据速率，转换所述多播传输的逻辑拓扑; 并且响应于接收到所述多播传输的多播数据分组，基于所述下游跳与所述处理器复制所述多播数据分组。

公开(公告)号：US20190280974A1

公开(公告)日：2019-09-12

申请号：US16425613

申请日：2019-05-29

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Huajin Jeng ,  Pravin Kumar Johri ,  Han Nguyen ,  Samir Saad

IPC: H04L12/741 ,  H04L12/26 ,  H04L12/18 ,  H04L12/761 ,  H04L12/723

Abstract: Methods, apparatus, and articles of manufacture to provide a multicast virtual private network (MVPN) are disclosed. Example methods to transmit multicast data in a network disclosed herein include monitoring, with a first network node, a multicast data flow to determine a characteristic for triggering a switch from a first logical topology for the multicast data flow to a second logical topology for the multicast data flow. Disclosed example methods also include, after the switch to the second logical topology, accessing a multicast data packet associated with a first multicast route generated for the multicast data flow from a second network node, and transmitting a first replication of the multicast data packet to a third network node via a unicast path, the first replication of the multicast data packet to include a first label provided by the third network node to identify the first multicast route.

公开(公告)号：US10122637B2

公开(公告)日：2018-11-06

申请号：US15799630

申请日：2017-10-31

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Penn L. Pfautz ,  Huajin Jeng

IPC: H04L1/00 ,  H04L12/26 ,  H04L12/851 ,  H04L12/863

Abstract: Methods, apparatus and articles of manufacture for advertising network layer reachability information specifying a quality of service for a network flow are disclosed. Example methods disclosed herein include advertising a first flow specification and a first quality of service for a first network flow to be received by a first network element, and constructing a packet filter for a second network flow based on a second flow specification and a second quality of service advertised by a second network element that is to receive the second network flow. Disclosed example methods also include adjusting, based on the packet filter, bits of an incoming packet determined to belong to the second network flow to determine an updated incoming packet, and assigning the updated incoming packet to a routing queue corresponding to the second quality of service to cause the updated incoming packet to be routed towards the second network element.

公开(公告)号：US20170171076A1

公开(公告)日：2017-06-15

申请号：US14970403

申请日：2015-12-15

Applicant: AT&T Intellectual Property I, L.P.

Inventor： HAN Q. NGUYEN ,  Huajin Jeng ,  Tuan Duong ,  Kang Xi

IPC: H04L12/741

CPC classification number: H04L45/745 ,  H04L45/60 ,  H04L45/742

Abstract: A router may include a central processing unit-based line card storing a forwarding table that includes a first set of entries, a network processing unit-based line card storing a partial forwarding table that includes a second set of entries comprising a subset of the first set of entries, where the second set of entries comprises entries that are most utilized by a plurality of line cards of the router, and a route controller for updating the second set of entries to comprise the entries that are the most utilized. The network processing unit-based line card may forward a packet when an entry in the partial forwarding table matches the packet and may forward the packet to the central processing unit-based line card to forward the packet when there is no entry in the partial forwarding table of the network processing-unit based line card that matches the packet.

公开(公告)号：US20160261420A1

公开(公告)日：2016-09-08

申请号：US15152932

申请日：2016-05-12

Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.

Inventor： Han Q. Nguyen ,  Huajin Jeng ,  Douglas M. Nortz

IPC: H04L12/18 ,  G06F21/10

CPC classification number: H04L12/185 ,  G06F21/10 ,  G06F21/606 ,  G06Q10/06 ,  H04L12/1845 ,  H04L12/1886 ,  H04L63/10 ,  H04L63/107 ,  H04L63/20

Abstract: A content distribution network includes first and second controllers, and multicast enabled routers. The first controller is configured to select a multicast channel for distributing content, to determine that the content has a geographic restriction associated with a restricted area in the content distribution network, to link an exclusion policy for the content to the multicast channel while the multicast channel provides the content, and to deny a request for the content from a client system within the restricted area based on the exclusion policy. The second controller is configured to distribute the exclusion policy to the multicast enabled routers including a first router configured to store the exclusion policy, and to ignore a multicast join message from the client system within the restricted area based on the exclusion policy.

Abstract translation: 内容分发网络包括第一和第二控制器以及启用多播的路由器。 所述第一控制器被配置为选择用于分发内容的多播信道，以确定所述内容具有与所述内容分发网络中的受限区域相关联的地理限制，以将所述内容的排除策略链接到所述多播信道，而所述多播信道 提供内容，并且基于排除策略来拒绝来自限制区域内的客户端系统的内容的请求。 第二控制器被配置为将排除策略分发到启用多播的路由器，包括配置为存储排除策略的第一路由器，并且基于排除策略忽略来自限制区域内的客户端系统的多播加入消息。

公开(公告)号：US20140160924A1

公开(公告)日：2014-06-12

申请号：US13707089

申请日：2012-12-06

Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.

Inventor： Penn L. Pfautz ,  Huajin Jeng

IPC: H04L12/56

CPC classification number: H04L47/24 ,  H04L47/2433 ,  H04L47/2441 ,  H04L47/2483 ,  H04L47/6215

Abstract: Methods, apparatus and articles of manufacture for advertising network layer reachability information specifying a quality of service for an identified network flow are disclosed. Example methods disclosed herein to specify quality of service for network flows include receiving network layer reachability information including a first quality of service class specified for a first network flow, the network layer reachability information having been advertised by a first network element that is to receive the first network flow. Such example methods can also include updating an incoming packet determined to belong to the first network flow to indicate that the incoming packet belongs to the first quality of service class, the incoming packet being received from a second network element. Such example methods can further include, after updating the incoming packet, routing the incoming packet towards the first network element.

Abstract translation: 公开了用于指定用于所识别的网络流的服务质量的广告网络层可达性信息的方法，装置和制品。 本文公开的用于指定网络流的服务质量的示例方法包括：接收包括为第一网络流指定的第一服务质量类别的网络层可达性信息，所述网络层可达性信息已被第一网元发送，以接收 第一网络流。 这样的示例性方法还可以包括更新确定属于第一网络流的输入分组，以指示输入分组属于第一服务质量类别，从第二网络元件接收输入分组。 这样的示例方法还可以包括，在更新输入分组之后，将输入分组路由到第一网络元件。