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    Method and apparatus for path computation element and routing controller cooperation
    2.
    发明授权
    Method and apparatus for path computation element and routing controller cooperation 有权
    用于路径计算元素和路由控制器协作的方法和装置

    公开(公告)号：US08644325B2

    公开(公告)日：2014-02-04

    申请号：US13394220

    申请日：2010-08-23

    申请人： Paola Iovanna ,  Giulio Bottari ,  Annikki Welin ,  Francesco Paolucci ,  Filippo Cugini ,  Piero Castoldi

    发明人： Paola Iovanna ,  Giulio Bottari ,  Annikki Welin ,  Francesco Paolucci ,  Filippo Cugini ,  Piero Castoldi

    IPC分类号： H04L12/56

    CPC分类号： H04Q11/0062 ,  H04L45/00 ,  H04L45/10 ,  H04L45/121 ,  H04L45/123 ,  H04L45/42 ,  H04L45/62 ,  H04Q2011/0073

    摘要： A system, method, and node for a Routing Controller (RC) to obtain from a Path Computation Element (PCE), network resource path metrics across a plurality of domains in a communication network in which each domain includes a plurality of Border Nodes (BNs). The RC sends to the PCE, a first message requesting a first path computation between each pair of BNs. The first message contains a maximum metric-value that a path computation must not exceed for a Path Computation Client (PCC) to consider the path computation acceptable. The RC then sends a second message requesting the PCE to compute a subsequent path computation for each BN pair for which the first path computation did not exceed the maximum metric-value. The second message contains a minimum metric-value that a path metric must exceed for the PCC to consider the path metric acceptable. The RC then receives the computed subsequent path computation.

    摘要翻译： 路由控制器（RC）的系统，方法和节点，用于从路径计算元素（PCE）获得在通信网络中的多个域中的网络资源路径度量，其中每个域包括多个边界节点（BN） ）。 RC向PCE发送请求在每对BN之间进行第一路径计算的第一消息。 第一条消息包含一个路径计算不能超过路径计算客户端（PCC）的最大度量值，以考虑可接受的路径计算。 然后，RC然后发送请求PCE的第二消息，以计算第一路径计算未超过最大度量值的每个BN对的后续路径计算。 第二条消息包含路由度量值必须超过PCC以考虑可接受的路径度量的最小度量值。 RC然后接收计算的后续路径计算。

    INTER-DOMAIN ADVERTISEMENTS IN MULTI-DOMAIN NETWORKS
    3.
    发明申请
    INTER-DOMAIN ADVERTISEMENTS IN MULTI-DOMAIN NETWORKS 审中-公开
    多域网络中的域间广告

    公开(公告)号：US20120102228A1

    公开(公告)日：2012-04-26

    申请号：US13256764

    申请日：2009-04-28

    申请人： Filippo Cugini ,  Piero Castoldi ,  Annikki Welin

    发明人： Filippo Cugini ,  Piero Castoldi ,  Annikki Welin

    IPC分类号： G06F15/173

    CPC分类号： H04L45/12 ,  H04L45/04 ,  H04L45/22 ,  H04L45/42 ,  H04L45/44 ,  H04L45/50

    摘要： In a multi-domain network each domain, or Autonomous System (AS), has a route calculation entity (PCE A) which is responsible for computing paths between domains on behalf of clients. The route calculation entity (PCE A) sends advertisement messages to a route calculation entity (PCE B) in another domain. The advertisement message carries at least one of: inter-domain resource information and aggregated intra-domain information, such as simplified topology information or cumulative traffic engineering (TE) metrics. The inter-domain resource information can be inter-domain route or reachability information which is normally discarded by a routing protocol such as the Border Gateway Protocol (BGP) and can include inter-domain Traffic Engineering (TE) information such as reservable bandwidth.

    摘要翻译： 在多域网络中，每个域或自治系统（AS）具有路由计算实体（PCE A），其负责代表客户端的域之间的计算路径。 路由计算实体（PCE A）向另一个域中的路由计算实体（PCE B）发送广播消息。 广告消息中携带以下至少一种：域间资源信息和聚合域内信息，如简化拓扑信息或累积流量工程（TE）度量。 域间资源信息可以是通常由边界网关协议（BGP）等路由协议丢弃的域间路由或可达性信息，并且可以包括诸如可预留带宽之类的域间流量工程（TE）信息。

    CHANGING THE SPECTRAL POSITION OF A LIGHTPATH
    5.
    发明申请
    CHANGING THE SPECTRAL POSITION OF A LIGHTPATH 有权
    改变LIGHTPATH的光谱位置

    公开(公告)号：US20150244493A1

    公开(公告)日：2015-08-27

    申请号：US14382299

    申请日：2012-03-22

    申请人： Filippo Cugini ,  Giulio Bottari ,  Gianmarco Bruno ,  Piero Castoldi ,  Paola Iovanna ,  Nicola Sambo

    发明人： Filippo Cugini ,  Giulio Bottari ,  Gianmarco Bruno ,  Piero Castoldi ,  Paola Iovanna ,  Nicola Sambo

    IPC分类号： H04J14/02

    CPC分类号： H04J14/0227 ,  H04J14/02 ,  H04J14/0224 ,  H04J14/0254 ,  H04J14/0257 ,  H04J14/026 ,  H04J14/0267

    摘要： A method of changing the spectral position of a lightpath between a source node and a destination node of an optical network. The optical network uses a flexible grid for spectral allocation and the lightpath has been allocated first spectral resources at a first spectral position. The method comprises, at the source node, reserving additional spectral resources for the lightpath which are contiguous in frequency with the first spectral resources. The method comprises re-tuning a light source at the source node such that the lightpath moves in frequency from using the first spectral resources at the first spectral position to using second spectral resources at a second spectral position, wherein the second spectral resources comprise at least some of the additional spectral resources. The method comprises releasing at least some of the first spectral resources. The source node continues to send traffic over the lightpath during the re-tuning.

    摘要翻译： 一种在光网络的源节点和目的地节点之间改变光路的光谱位置的方法。 光网络使用灵活的网格进行光谱分配，并且光路已经在第一光谱位置分配了第一光谱资源。 该方法包括在源节点处为与第一光谱资源频率相邻的光路预留附加光谱资源。 该方法包括在源节点处重新调谐光源，使得光路在频率上从使用第一光谱位置处的第一光谱资源移动到在第二光谱位置处使用第二光谱资源，其中第二光谱资源至少包括 一些额外的频谱资源。 该方法包括释放至少一些第一光谱资源。 在重新调谐期间，源节点继续在光路上发送流量。

    Establishing connections in a multi-rate optical network
    6.
    发明授权
    Establishing connections in a multi-rate optical network 有权
    在多速率光网络中建立连接

    公开(公告)号：US09100730B2

    公开(公告)日：2015-08-04

    申请号：US13825017

    申请日：2010-10-15

    申请人： Nicola Sambo ,  Giulio Bottari ,  Piero Castoldi ,  Filippo Cugini ,  Paola Iovanna

    发明人： Nicola Sambo ,  Giulio Bottari ,  Piero Castoldi ,  Filippo Cugini ,  Paola Iovanna

    IPC分类号： H04J14/00 ,  H04Q11/00 ,  H04J14/02

    CPC分类号： H04Q11/0062 ,  H04J14/0257 ,  H04J14/0258 ,  H04J14/026 ,  H04J14/0267 ,  H04J14/0269 ,  H04Q2011/0077 ,  H04Q2011/0088

    摘要： An optical transmission network comprises nodes which support a plurality of different wavelength channels and support at least a first bitrate traffic type and the second bitrate traffic type on respective wavelength channels. A connection of the second bitrate traffic type is established on an available wavelength, if the wavelength offers an acceptable quality of transmission using a first quality of transmission calculation. Alternatively, a connection of the second bitrate traffic type is established on a wavelength which is spaced, by a guard band, from wavelengths used for connections of the first bitrate traffic type, if the wavelength offers an acceptable quality of transmission using a second quality of transmission calculation. The second quality of transmission calculation is less stringent than the first quality of transmission calculation, and can ignore the effects of interference due to cross-phase modulation. The guard band is a wavelength spacing at which the interference between a connection of the first bitrate traffic type and a connection of the second bitrate traffic type is less than a predetermined amount.

    摘要翻译： 光传输网络包括支持多个不同波长信道并且在相应波长信道上支持至少第一比特率业务类型和第二比特流量类型的节点。 如果波长使用第一传输质量计算提供可接受的传输质量，则在可用波长上建立第二比特流量类型的连接。 或者，如果波长使用第二比特率业务类型的连接的波长提供可接受的传输质量，则以由保护频带隔开的波长建立第二比特流量类型的连接， 传输计算。 传输计算的第二种质量不如第一传输质量计算严格，可以忽略由于交叉相位调制引起的干扰的影响。 保护频带是第一比特流量类型的连接与第二比特流量类型的连接之间的干扰小于预定量的波长间隔。

    ROUTING FOR SUPER CHANNEL FOR BANDWIDTH VARIABLE WAVELENGTH SWITCHED OPTICAL NETWORK
    7.
    发明申请
    ROUTING FOR SUPER CHANNEL FOR BANDWIDTH VARIABLE WAVELENGTH SWITCHED OPTICAL NETWORK 有权
    用于波段可变波长切换光网络的超频道路由

    公开(公告)号：US20150215688A1

    公开(公告)日：2015-07-30

    申请号：US14417550

    申请日：2012-08-16

    申请人： Nicola Sambo ,  Giulio Bottari ,  Piero Castoldi ,  Filippo Cugini ,  Paola Iovanna

    发明人： Nicola Sambo ,  Giulio Bottari ,  Piero Castoldi ,  Filippo Cugini ,  Paola Iovanna

    IPC分类号： H04Q11/00 ,  H04J14/02

    CPC分类号： H04Q11/0062 ,  H04J14/0212 ,  H04J14/0257 ,  H04J14/0261 ,  H04J14/0267 ,  H04J14/0298 ,  H04L27/2697 ,  H04L45/62 ,  H04Q2011/0086 ,  H04Q2011/0088

    摘要： In an optical communications network using bandwidth variable wavelength switching, routing and spectrum assignment for a traffic request for x sub-carriers of a super-channel, involves checking for an existing super-channel having sufficient potential sub-carriers not currently active. If not found, then possible paths for a new super-channel are identified and a path is selected and sub-carriers assigned. By trying first to use inactive potential sub-carriers of an existing super-channel, fewer super channels overall are needed, and thus fewer super transponders are needed. This can reduce blocking probabilities and can reduce capital costs. The search for possible paths can try to avoid or reduce overlap with spectrum of existing super channels, or compare possible paths by weighting according to amounts of overlap.

    摘要翻译： 在使用带宽可变波长切换的光通信网络中，对于超级信道的x个子载波的业务请求的路由和频谱分配涉及检查具有当前没有活动的足够的潜在子载波的现有超级信道。 如果没有找到，则识别新的超级信道的可能路径，并且选择路径并分配子载波。 首先尝试使用现有超级频道的无效潜在子载波，需要更少的超级频道，因此需要更少的超级应答器。 这可以减少阻塞概率，并可以降低资本成本。 搜索可能的路径可以尝试避免或减少与现有超级频道的频谱重叠，或者通过根据重叠量加权来比较可能的路径。

    METHOD AND APPARATUS FOR ALLOCATING SLOTS FOR TRANSMISSION OF DATA
    8.
    发明申请
    METHOD AND APPARATUS FOR ALLOCATING SLOTS FOR TRANSMISSION OF DATA 有权
    用于分配数据传输的方法和装置

    公开(公告)号：US20150139652A1

    公开(公告)日：2015-05-21

    申请号：US14345020

    申请日：2011-12-07

    申请人： Giulio Bottari ,  Piero Castoldi ,  Filippo Cugini ,  Paola Iovanna ,  Nicola Sambo

    发明人： Giulio Bottari ,  Piero Castoldi ,  Filippo Cugini ,  Paola Iovanna ,  Nicola Sambo

    IPC分类号： H04J14/02

    CPC分类号： H04J14/023 ,  H04J14/0256 ,  H04J14/0257 ,  H04J14/0258

    摘要： Slots (311) for transmission of data of a particular transmission type over an optical network are allocated by selecting a first available slot (313—2) at an ordinal position corresponding to a multiple of n and allocating the selected first available slot and the next n−1 consecutive slots (313—4, 313—5) from the selected first available slot (313—3), if all n-1 consecutive slots (313—4, 313—5) are available, for transmission of data of the particular transmission type. The data is transmitted over an optical network comprising a plurality of nodes (305, 327) interconnected by optical sections (301, 309, 329, 331) the nodes (305, 327) supporting a plurality of transmission types, wherein transmission of data of the particular transmission type requires a predetermined number n of consecutive slots. Alternatively the slots may be divided in groups (333, 335, 337) and slots are allocated to a group in which all slots are available.

    摘要翻译： 通过在对应于n的倍数的顺序位置选择第一可用时隙（313-2）来分配用于通过光网络传输特定传输类型的数据的时隙（311），并且分配所选择的第一可用时隙和下一个 如果所有n-1个连续时隙（313-4,313-5）可用，则从所选择的第一可用时隙（313-3）的n-1个连续时隙（313-4,313-5），用于传输 特定的传输类型。 数据通过包括多个节点（305,327）的光网络传输，所述多个节点（305,327）由支持多个传输类型的节点（305,327）的光学部分（301,309,329,331）互连，其中传输数据 特定传输类型需要预定数量的n个连续时隙。 或者，时隙可以被分组（333,335,337），并且时隙被分配给所有时隙都可用的组。

    METHOD OF CONFIGURING AN OPTICAL PATH, A PATH COMPUTATION ENGINE AND AN OPTICAL COMMUNICATIONS NETWORK NODE
    9.
    发明申请
    METHOD OF CONFIGURING AN OPTICAL PATH, A PATH COMPUTATION ENGINE AND AN OPTICAL COMMUNICATIONS NETWORK NODE 有权
    配置光路的方法，路径计算引擎和光通信网络节点

    公开(公告)号：US20140093246A1

    公开(公告)日：2014-04-03

    申请号：US13983058

    申请日：2011-03-21

    申请人： Nicola Sambo ,  Giulio Bottari ,  Piero Castoldi ,  Filippo Cugini ,  Paola Iovanna

    发明人： Nicola Sambo ,  Giulio Bottari ,  Piero Castoldi ,  Filippo Cugini ,  Paola Iovanna

    IPC分类号： H04J14/02

    CPC分类号： H04J14/0201 ,  H04J14/021 ,  H04J14/0227 ,  H04J14/0257 ,  H04J14/0258 ,  H04J14/0267

    摘要： A method of configuring an optical path, comprising: selecting a path from a first to a second node in an optical communications network; identifying each wavelength that may be used continuously across the path and selecting a transmission wavelength for the optical path one of the identified wavelengths for which: a fixed wavelength direction-bound add/drop transponder add operable at said wavelength is available at each node; if that first requirement is not met, a fixed wavelength direction-bound add/drop transponder or a fixed wavelength directionless add/drop transponder operable at said wavelength is available at each node; and if that second requirement is not met, a tunable wavelength direction-bound add/drop transponder or a tunable wavelength directionless add/drop transponder operable at said wavelength is available at each node.

    摘要翻译： 一种配置光路的方法，包括：在光通信网络中选择从第一节点到第二节点的路径; 识别可以在所述路径上连续使用的每个波长，并且为所述光路中的一个选择所述识别的波长之一的传输波长，其中：在所述波长处的固定波长方向绑定的分插转发器加法可在每个节点处可用; 如果不满足该第一要求，则可以在每个节点处获得固定波长方向绑定的分插转发器或在所述波长下可操作的固定波长无向分插转发器， 并且如果不满足该第二要求，则可在每个节点处获得可调波长方向绑定的分插转发器或在所述波长下可操作的可调波长无向分插转发器。

    Method and apparatus for allocating slots for transmission of data
    10.
    发明授权
    Method and apparatus for allocating slots for transmission of data 有权

    公开(公告)号：US09768904B2

    公开(公告)日：2017-09-19

    申请号：US14345020

    申请日：2011-12-07

    申请人： Giulio Bottari ,  Piero Castoldi ,  Filippo Cugini ,  Paola Iovanna ,  Nicola Sambo

    发明人： Giulio Bottari ,  Piero Castoldi ,  Filippo Cugini ,  Paola Iovanna ,  Nicola Sambo

    IPC分类号： H04J14/02

    CPC分类号： H04J14/023 ,  H04J14/0256 ,  H04J14/0257 ,  H04J14/0258

    摘要： Slots (311) for transmission of data of a particular transmission type over an optical network are allocated by selecting a first available slot (313_2) at an ordinal position corresponding to a multiple of n and allocating the selected first available slot and the next n−1 consecutive slots (313_4, 313_5) from the selected first available slot (313_3), if all n−1 consecutive slots (313_4, 313_5) are available, for transmission of data of the particular transmission type. The data is transmitted over an optical network comprising a plurality of nodes (305, 327) interconnected by optical sections (301, 309, 329, 331) the nodes (305, 327) supporting a plurality of transmission types, wherein transmission of data of the particular transmission type requires a predetermined number n of consecutive slots. Alternatively the slots may be divided in groups (333, 335, 337) and slots are allocated to a group in which all slots are available.