Digital signal broadcasting
    1.
    发明授权
    Digital signal broadcasting 失效
    数字信号广播

    公开(公告)号:US5787089A

    公开(公告)日:1998-07-28

    申请号:US687302

    申请日:1996-07-25

    摘要: A distribution network groups television program signals into service tiers. To provide these from unsynchronized MPEG streams without resynchronization, each stream, representing a single program signal is encapsulated into ATM cells with a virtual path (VP) identification of each ATM cell corresponding to the service tier and a virtual channel (VC) identification corresponding to the respective program signal. Payloads in cells having the same VP are scrambled using a scrambling key allocated to that VP and hence to the corresponding service tier, and are unscrambled by entitled subscribers using the scrambling key which is supplied to them individually using public/private encryption techniques.

    摘要翻译: 分销网络将电视节目信号分组成服务层。 为了从未同步的MPEG流中提供这些来自不同步的数据流,表示单个程序信号的每个流被封装到具有对应于服务层的每个ATM信元的虚拟路径(VP)标识的ATM信元中,以及与服务层对应的虚拟信道(VC)标识 相应的程序信号。 使用具有相同VP的小区中的有效负载使用分配给该VP并因此加到相应服务层的扰频密钥进行加扰,并且通过使用使用公共/专用加密技术单独提供给它们的加密密钥的授权订户来解扰。

    AUTOMATED TRAFFIC ENGINEERING FOR FAT TREE NETWORKS
    2.
    发明申请
    AUTOMATED TRAFFIC ENGINEERING FOR FAT TREE NETWORKS 有权
    用于FAT树网络的自动交通工程

    公开(公告)号:US20120039161A1

    公开(公告)日:2012-02-16

    申请号:US12983009

    申请日:2010-12-31

    IPC分类号: H04L12/26 H04L12/28

    摘要: Embodiments of a method implemented in at least one fat tree network node for improved load distribution, wherein the node is one of a plurality of fat tree network nodes in a fat tree network each of which implement a tie-breaking process to produce minimum cost trees, is described. In some embodiments, a spanning tree computation for each root node of the fat tree network in order from a lowest ranked root node to a highest ranked node is performed, a filtering database for each root node of the fat tree network, wherein the filtering database includes a set of media access control (MAC) addresses of the leaf nodes of the fat tree network generated, and link utilization for each computed tree to use as a prefix to link identifiers used for at least one tie-breaking algorithm added.

    摘要翻译: 在至少一个胖树网络节点中实现的用于改善负载分布的方法的实施例,其中所述节点是胖树网络中的多个胖树网络节点之一,每个胖树网络节点实施断开过程以产生最小成本树 ,被描述。 在一些实施例中,执行从最低排名根节点到最高排名节点的胖树网络的每个根节点的生成树计算,胖树网络的每个根节点的过滤数据库,其中过滤数据库 包括生成的胖树网络的叶节点的一组媒体访问控制(MAC)地址,以及用于每个计算树的链路利用率以用作链接用于添加的至少一个断开算法的标识符的前缀。

    Facilitating secure communications in a distribution network
    3.
    发明授权
    Facilitating secure communications in a distribution network 失效
    促进分销网络中的安全通信

    公开(公告)号:US5870475A

    公开(公告)日:1999-02-09

    申请号:US588848

    申请日:1996-01-19

    IPC分类号: H04L9/08 H04L9/00

    CPC分类号: H04L9/0825 H04L9/0891

    摘要: In a hybrid fiber-coax distribution network, communications between a central station and particular end stations are encrypted using a working key (WK) of a symmetric encryption scheme. The central station has a public and private key (PPK) of a PPK encryption scheme, and some of the end stations can also each have a respective PPK. To provide secure communications for each end station, if the end station has a PPK, then the respective WK is generated in the central station and communicated, encrypted using the end station's public key (PK), to the end station. Otherwise, the WK is generated in the end station and communicated, encrypted using the central station's PK, to the central station. An individual identifier for each end station, and a cryptographic signature at least for end stations not having a PPK, can be communicated to the central station for authentication of the end stations.

    摘要翻译: 在混合光纤同轴分配网络中,使用对称加密方案的工作密钥(WK)对中心站和特定终端站之间的通信进行加密。 中心站具有PPK加密方案的公私密钥(PPK),一些终端站也可以各有一个PPK。 为了为每个终端站提供安全通信,如果终端具有PPK,则在中心站中生成相应的WK,并使用终端站的公钥(PK)进行通信,并将其传送到终端站。 否则,WK在终端站生成,并使用中心站的PK进行加密传送到中心站。 每个终端站的个人标识符和至少对不具有PPK的终端站的加密签名可以被传送到中心站以用于终端站的认证。

    Automated traffic engineering for fat tree networks
    4.
    发明授权
    Automated traffic engineering for fat tree networks 有权
    胖树网络的自动流量工程

    公开(公告)号:US09210071B2

    公开(公告)日:2015-12-08

    申请号:US12983009

    申请日:2010-12-31

    摘要: Embodiments of a method implemented in at least one fat tree network node for improved load distribution, wherein the node is one of a plurality of fat tree network nodes in a fat tree network each of which implement a tie-breaking process to produce minimum cost trees, is described. In some embodiments, a spanning tree computation for each root node of the fat tree network in order from a lowest ranked root node to a highest ranked node is performed, a filtering database for each root node of the fat tree network, wherein the filtering database includes a set of media access control (MAC) addresses of the leaf nodes of the fat tree network generated, and link utilization for each computed tree to use as a prefix to link identifiers used for at least one tie-breaking algorithm added.

    摘要翻译: 在至少一个胖树网络节点中实现的用于改善负载分布的方法的实施例,其中所述节点是胖树网络中的多个胖树网络节点之一,每个胖树网络节点实施断开过程以产生最小成本树 ,被描述。 在一些实施例中,执行从最低排名根节点到最高排名节点的胖树网络的每个根节点的生成树计算,胖树网络的每个根节点的过滤数据库,其中过滤数据库 包括生成的胖树网络的叶节点的一组媒体访问控制(MAC)地址,以及用于每个计算树的链路利用率以用作链接用于添加的至少一个断开算法的标识符的前缀。

    Method and system for looping back traffic in QIQ ethernet rings and 1:1 protected PBT trunks
    5.
    发明授权
    Method and system for looping back traffic in QIQ ethernet rings and 1:1 protected PBT trunks 有权
    QIQ以太网环和1:1保护PBT中继流量循环的方法和系统

    公开(公告)号:US08085676B2

    公开(公告)日:2011-12-27

    申请号:US11955888

    申请日:2007-12-13

    IPC分类号: G01R31/08

    摘要: A resilient virtual Ethernet ring has nodes interconnected by working and protection paths. If a span fails, the two nodes immediately on either side of the failure are cross-connected to fold the ring. Working-path traffic is cross-connected onto the protection path at the first of the two nodes and is then cross-connected back onto the working path at the second of the two nodes so that traffic always ingresses and egresses the ring from the working path. A traffic originating node, upon determining that transmitted packets are being looped back due to a fault on a primary path, is adapted to switch transmission of data packets from the primary path to a secondary path.

    摘要翻译: 一个有弹性的虚拟以太网环具有通过工作和保护路径互连的节点。 如果跨度失效,则立即在故障两侧的两个节点交叉连接以折叠环。 工作路径流量交叉连接到两个节点第一个的保护路径上,然后在两个节点的第二个端口上交叉连接回工作路径,以便流量始终从工作路径中进出环 。 业务始发节点在确定由于主路径上的故障而被发送的分组环回时适于将数据分组从主路径传输到次路径。