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1. 发明授权

US08885463B1 Path computation element communication protocol (PCEP) extensions for stateful label switched path management 有权
标题翻译：用于状态标签交换路径管理的路径计算单元通信协议（PCEP）扩展
公开(公告)号：US08885463B1
公开(公告)日：2014-11-11
申请号：US13324861
申请日：2011-12-13
申请人： Jan Medved , David Ward , Robert Varga
发明人： Jan Medved , David Ward , Robert Varga
IPC分类号： H04L12/28
CPC分类号： H04L45/50 , H04L45/02 , H04L45/38
摘要： In general, techniques are described for extending a path computation element (PCE) communication protocol (PCEP) to support messages that enable PCEs to actively modify Multi-Protocol Label Switching (MPLS) for Traffic Engineering Label Switched Paths (TE LSPs) in and across network domains. In one example, an LSP database of a router includes configuration data for one or more LSPs configured in the router and further includes LSP state information specifying a current state of all LSPs of the router. A path computation client (PCC) of a router establishes an extended PCEP session and synchronizes LSP state information to a stateful PCE using the extended PCEP session. Subsequently, the stateful PCE sends an LSP update request to the PCC in the extended PCEP session, wherein the LSP update request includes one or more updated parameters for the LSP. The PCC then re-signals the LSP through the network according to the updated parameters.
摘要翻译：通常，描述了用于扩展路径计算元件（PCE）通信协议（PCEP）以支持使得PCE能够主动修改用于和跨越的流量工程标签交换路径（TE LSP）的多协议标签交换路由（MPLS）的消息的技术。网域。在一个示例中，路由器的LSP数据库包括在路由器中配置的一个或多个LSP的配置数据，还包括指定路由器所有LSP的当前状态的LSP状态信息。路由器的路径计算客户端（PCC）建立扩展PCEP会话，并使用扩展PCEP会话将LSP状态信息同步到有状态PCE。随后，有状态PCE在扩展PCEP会话中向PCC发送LSP更新请求，其中LSP更新请求包括用于LSP的一个或多个更新的参数。然后，PCC根据更新的参数通过网络重新发送LSP。

2. 发明授权

US08751613B1 Application layer traffic optimization enhancements for mobile devices 有权
标题翻译：移动设备的应用层流量优化增强功能
公开(公告)号：US08751613B1
公开(公告)日：2014-06-10
申请号：US12942678
申请日：2010-11-09
申请人： Jan Medved , David Ward , James Guichard
发明人： Jan Medved , David Ward , James Guichard
IPC分类号： G06F15/177
CPC分类号： H04L45/021 , H04L29/12066 , H04L41/12 , H04L45/00 , H04L45/028 , H04L45/04 , H04L47/10 , H04L61/1511 , H04L67/1021 , H04L67/104
摘要： In general, techniques are described for enhancing the Application-Layer Traffic Optimization (ALTO) service to supplement network topological grouping with location-based groupings to account for endpoint mobility. For example, as described herein, an ALTO server maintains physical location information for a network of one or more endpoints that provides a service. A PID generator of the ALTO server aggregates the endpoints into a set of one or more PIDs based at least on the physical location information for the endpoints, wherein each PID is associated with a subset of the endpoints. The ALTO server generates network and cost maps for the ALTO service that include PID entries to identify a respective subset of the endpoints associated with each of the set of PIDs and cost entries that incorporate cost that reflect physical distances among endpoints.
摘要翻译：通常，描述了用于增强应用层业务优化（ALTO）服务的技术，以基于位置分组来补充网络拓扑分组以解决端点移动性。例如，如本文所述，ALTO服务器维护提供服务的一个或多个端点的网络的物理位置信息。至少基于端点的物理位置信息，ALTO服务器的PID发生器将端点聚合成一组一个或多个PID，其中每个PID与端点的子集相关联。 ALTO服务器生成包含PID条目的ALTO服务的网络和成本图，以识别与该组PID中的每一个相关联的端点的相应子集以及包含反映端点之间的物理距离的成本的成本条目。

3. 发明授权

US08711838B1 Using network labels without standard-defined syntax and semantics 有权
标题翻译：使用没有标准定义语法和语义的网络标签
公开(公告)号：US08711838B1
公开(公告)日：2014-04-29
申请号：US13243310
申请日：2011-09-23
申请人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
发明人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
IPC分类号： H04L12/28
CPC分类号： H04L12/4633 , H04L12/4645
摘要： In general, techniques are described for transmitting MPLS labels over a network. More specifically, a network device such a router receives a packet to be forwarded according to a label switching protocol, such as Multi-Protocol Label Switching (MPLS). The router may determine a service instance for the packet based on a client device from which the packet originated. The network device may determine one or more services to apply to the packet based on the service instance for the packet and generate a label which having a service instance portion and a service information portion. The network device may append the label to the packet to form an MPLS-encapsulated packet, and may forward the MPLS-encapsulated packet via an output interface according to the label switching protocol.
摘要翻译：通常，描述了通过网络传输MPLS标签的技术。更具体地，诸如路由器的网络设备根据诸如多协议标签交换（MPLS）的标签交换协议来接收要转发的分组。路由器可以基于从其发起分组的客户端设备来确定分组的服务实例。网络设备可以基于分组的服务实例来确定应用于分组的一个或多个服务，并且生成具有服务实例部分和服务信息部分的标签。网络设备可以将标签附加到分组，形成MPLS封装的分组，并且可以根据标签交换协议经由输出接口转发MPLS封装的分组。

4. 发明授权

US09088519B2 Allocating and distributing labels for packet encapsulation 有权
标题翻译：分配和分发报文封装标签
公开(公告)号：US09088519B2
公开(公告)日：2015-07-21
申请号：US13525073
申请日：2012-06-15
申请人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
发明人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
IPC分类号： H04L12/723 , H04L12/46
CPC分类号： H04L45/50 , H04L12/4645 , H04L45/507
摘要： In one example, a network device receives a packet to be forwarded according to a label switching protocol, determines a service to be performed on the packet by a service network device, sends a label request message to the service network device, wherein the label request message indicates support for labels having a particular length, wherein the particular length is larger than twenty bits (e.g., forty bits), and wherein the label request message specifies the service to be performed on the packet, receives, in response to the label request message, a label mapping message defining a label of the particular length, appends the label to the packet to form a Multi-Protocol Label Switching (MPLS)-encapsulated packet, and forwards the MPLS-encapsulated packet according to the label switching protocol.
摘要翻译：在一个示例中，网络设备根据标签交换协议接收要转发的分组，由服务网络设备确定要在分组上执行的服务，向服务网络设备发送标签请求消息，其中标签请求消息指示对具有特定长度的标签的支持，其中特定长度大于二十位（例如，四十位），并且其中标签请求消息指定要对分组执行的服务，响应于标签请求而接收消息，定义特定长度的标签的标签映射消息，将标签附加到分组以形成多协议标签交换（MPLS）封装的分组，并根据标签交换协议转发MPLS封装的分组。

5. 发明申请

US20120144066A1 DYNAMICALLY GENERATING APPLICATION-LAYER TRAFFIC OPTIMIZATION PROTOCOL MAPS 有权
标题翻译：动态生成应用层交通协议优化协议
公开(公告)号：US20120144066A1
公开(公告)日：2012-06-07
申请号：US13110987
申请日：2011-05-19
申请人： Jan Medved , Hannes Gredler , David Ward , Satish Raghunath
发明人： Jan Medved , Hannes Gredler , David Ward , Satish Raghunath
IPC分类号： G06F15/173
CPC分类号： H04L45/42 , H04L45/02 , H04L45/04 , H04L45/64 , H04L67/32 , H04L69/321 , H04L69/329
摘要： In general, techniques are described for using routing information obtained by operation of network routing protocols to dynamically generate network and cost maps for an application-layer traffic optimization (ALTO) service. For example, an ALTO server of an autonomous system (AS) receives routing information from routers of the AS by listening for routing protocol updates outputted by the routers and uses the received topology information to dynamically generate a network map of PIDs that reflects a current topology of the AS and/or of the broader network that includes the AS. Additionally, the ALTO server dynamically calculates inter-PID costs using received routing information that reflects current link metrics. The ALTO server then assembles the inter-PID costs into a cost map that the ALTO server may provide, along with the network map, to clients of the ALTO service.
摘要翻译：一般来说，描述了使用通过网络路由协议的操作而获得的路由信息来动态地生成用于应用层流量优化（ALTO）服务的网络和成本映射的技术。例如，自治系统（AS）的ALTO服务器通过监听由路由器输出的路由协议更新从AS的路由器接收路由信息，并使用接收的拓扑信息动态生成反映当前拓扑的PID的网络映射的AS和/或包括AS的更广泛的网络。此外，ALTO服务器使用反映当前链路指标的接收路由信息动态计算PID间成本。然后，ALTO服务器将PID成本组合到ALTO服务器可以提供的成本图以及网络映射到ALTO服务的客户端。

6. 发明授权

US09178801B1 Automated service discovery in computer networks 有权
标题翻译：计算机网络中的自动服务发现
公开(公告)号：US09178801B1
公开(公告)日：2015-11-03
申请号：US13534140
申请日：2012-06-27
申请人： James Guichard , David Ward , Jan Medved
发明人： James Guichard , David Ward , Jan Medved
IPC分类号： H04L12/707
CPC分类号： H04L45/22 , H04L12/6418
摘要： In general, techniques are described for automatically discovering services in computer networks. A service node comprising a control unit and an interface may implement the techniques. The control unit determines services provided by the service node and generates a routing protocol message that includes service discovery information related to the services. The interface transmits the routing protocol message to enable network devices of the network to discover the services provided by the service node based on the service discovery information. The interface then receives traffic via a path established based on the service discovery information included in the routing protocol message and configured so that the service node applies at least one of the services to the traffic received via the path. The control unit then applies the one or more services to the traffic received via the path.
摘要翻译：一般来说，描述了在计算机网络中自动发现服务的技术。包括控制单元和接口的服务节点可以实施这些技术。所述控制单元确定由所述服务节点提供的服务，并且生成包括与所述服务相关的服务发现信息的路由协议消息。接口发送路由协议消息，使网络的网络设备能够根据业务发现信息发现业务节点提供的业务。接口然后通过基于包括在路由协议消息中的服务发现信息建立的路径来接收流量，并且被配置为使得服务节点将至少一个服务应用于经由路径接收到的业务。控制单元然后将一个或多个服务应用于经由路径接收到的业务。

7. 发明授权

US09019865B2 Advertising traffic engineering information with the border gateway protocol 有权
标题翻译：广告流量工程信息与边界网关协议
公开(公告)号：US09019865B2
公开(公告)日：2015-04-28
申请号：US13411292
申请日：2012-03-02
申请人： Hannes Gredler , Jan Medved , David Ward
发明人： Hannes Gredler , Jan Medved , David Ward
IPC分类号： H04L12/28 , H04L12/715 , H04L12/725
CPC分类号： H04L47/125 , H04L45/04 , H04L45/121 , H04L45/124 , H04L45/302 , H04L45/44 , H04L45/50 , H04L47/724 , H04L47/785
摘要： In general, techniques are described for distributing traffic engineering (TE) link information across network routing protocol domain boundaries using a routing protocol. In one example, a network device logically located within a first routing protocol domain includes a routing protocol module executing on a control unit to execute an exterior gateway routing protocol. The routing protocol module of the network device receives an exterior gateway routing protocol advertisement from a router logically located within a second routing protocol domain and decodes traffic engineering information for a traffic engineering link from the exterior gateway routing protocol advertisement. A path computation module of the network device computes a traffic engineered path by selecting the traffic engineering link for inclusion in the traffic engineered path based on the traffic engineering information.
摘要翻译：一般来说，描述了使用路由协议跨网络路由协议域边界分配流量工程（TE）链路信息的技术。在一个示例中，逻辑上位于第一路由协议域内的网络设备包括在控制单元上执行以执行外部网关路由协议的路由协议模块。网络设备的路由协议模块从逻辑上位于第二路由协议域内的路由器接收外部网关路由协议通告，并从外部网关路由协议广告中解码流量工程链路的流量工程信息。网络设备的路径计算模块通过根据流量工程信息选择流量工程链路来包含在流量工程路径中，计算流量工程路径。

8. 发明授权

US08909736B1 Content delivery network referral 有权
标题翻译：内容传送网络推荐
公开(公告)号：US08909736B1
公开(公告)日：2014-12-09
申请号：US13547917
申请日：2012-07-12
申请人： Hendrikus G. P. Bosch , Scott Ferguson , Jan Medved , David Ward , Hannes Gredler
发明人： Hendrikus G. P. Bosch , Scott Ferguson , Jan Medved , David Ward , Hannes Gredler
IPC分类号： G06F15/16
CPC分类号： H04L67/1093 , H04L65/4084 , H04L65/60 , H04L67/2814 , H04N21/63
摘要： In general, techniques are described for managing content request referrals by keying content requests to a composite key data structure that maps end-user address prefixes and content identifiers to content delivery network servers of downstream CDNs. In one example, a CDN exchange includes a communication module to receive first network prefixes and first content identifiers from a first secondary content delivery network and to receive second network prefixes and second content identifiers from a second secondary content delivery network. A request router of the CDN exchange redirects the content request to the first secondary content delivery network or to the second secondary content delivery network according to a network address of the end user device and a content identifier for the content request.
摘要翻译：通常，描述了通过将内容请求键入到将终端用户地址前缀和内容标识符映射到下游CDN的内容传送网络服务器的复合密钥数据结构来管理内容请求引用的技术。在一个示例中，CDN交换机包括通信模块，用于从第一次要内容传送网络接收第一网络前缀和第一内容标识符，并从第二次要内容传送网络接收第二网络前缀和第二内容标识符。 CDN交换机的请求路由器根据最终用户设备的网络地址和内容请求的内容标识符将内容请求重定向到第一次要内容传送网络或第二次要内容传送网络。

9. 发明申请

US20130336315A1 ALLOCATING AND DISTRIBUTING LABELS FOR PACKET ENCAPSULATION 有权
标题翻译：分发和分发标签进行包装封装
公开(公告)号：US20130336315A1
公开(公告)日：2013-12-19
申请号：US13525073
申请日：2012-06-15
申请人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
发明人： James Guichard , David Ward , Jan Medved , Maciek Konstantynowicz
IPC分类号： H04L12/56
CPC分类号： H04L45/50 , H04L12/4645 , H04L45/507
摘要： In one example, a network device receives a packet to be forwarded according to a label switching protocol, determines a service to be performed on the packet by a service network device, sends a label request message to the service network device, wherein the label request message indicates support for labels having a particular length, wherein the particular length is larger than twenty bits (e.g., forty bits), and wherein the label request message specifies the service to be performed on the packet, receives, in response to the label request message, a label mapping message defining a label of the particular length, appends the label to the packet to form a Multi-Protocol Label Switching (MPLS)-encapsulated packet, and forwards the MPLS-encapsulated packet according to the label switching protocol.
摘要翻译：在一个示例中，网络设备根据标签交换协议接收要转发的分组，由服务网络设备确定要在分组上执行的服务，向服务网络设备发送标签请求消息，其中标签请求消息指示对具有特定长度的标签的支持，其中特定长度大于二十位（例如，四十位），并且其中标签请求消息指定要对分组执行的服务，响应于标签请求而接收消息，定义特定长度的标签的标签映射消息，将标签附加到分组以形成多协议标签交换（MPLS）封装的分组，并根据标签交换协议转发MPLS封装的分组。

10. 发明申请

US20130336159A1 DISTRIBUTED STATEFUL PATH COMPUTATION ELEMENT OVERLAY ARCHITECTURE 有权
标题翻译：分布式状态计算元素重叠结构
公开(公告)号：US20130336159A1
公开(公告)日：2013-12-19
申请号：US13524071
申请日：2012-06-15
申请人： Stefano Previdi , Jean-Philippe Vasseur , Jan Medved , David Ward
发明人： Stefano Previdi , Jean-Philippe Vasseur , Jan Medved , David Ward
IPC分类号： H04L12/28
CPC分类号： H04L45/50 , H04L45/04
摘要： In one embodiment, a particular device in a computer network maintains a locally owned tunnel-state table, and joins a distributed hash table (DHT) ring. In addition, the locally owned tunnel-state table is shared with other devices of the DHT ring to establish a DHT-owned tunnel-state table. The particular device (and other devices) determines ownership of link-state advertisements (LSAs) for a specific portion of a traffic engineering database (TED) according to the DHT ring. As such, when the particular device (or any device) computes a path for a tunnel using a local TED, the particular device may request permission to use resources along the computed path that were advertised in particular LSAs from owners of those particular LSAs when not owned by the particular device.
摘要翻译：在一个实施例中，计算机网络中的特定设备维护本地拥有的隧道状态表，并且连接分布式散列表（DHT）环。此外，本地拥有的隧道状态表与DHT环的其他设备共享，以建立DHT拥有的隧道状态表。特定设备（和其他设备）根据DHT环确定针对流量工程数据库（TED）的特定部分的链路状态通告（LSA）的所有权。因此，当特定设备（或任何设备）使用本地TED计算隧道的路径时，特定设备可以请求允许沿着所计算的路径使用资源，这些资源在特定LSA的特定LSA中被从该特定LSA的所有者通告由特定设备拥有。

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