公开(公告)号：US20140328587A1

公开(公告)日：2014-11-06

申请号：US14343545

申请日：2011-11-03

申请人： Roberto Magri ,  Piero Castoldi ,  Filippo Cugini ,  Francesco Paolucci ,  Nicola Sambo

发明人： Roberto Magri ,  Piero Castoldi ,  Filippo Cugini ,  Francesco Paolucci ,  Nicola Sambo

IPC分类号： H04Q11/00 ,  H04L12/721 ,  H04B10/079 ,  H04J14/02

CPC分类号： H04Q11/0066 ,  H04J14/0257 ,  H04J14/0258 ,  H04J14/026 ,  H04J14/0269 ,  H04J14/0271 ,  H04L45/42 ,  H04L45/62 ,  H04Q2011/0073 ,  H04Q2011/0083

摘要： A path computation client (PCC) can request a path computation element (PCE) to compute a path across a wavelength switched optical network. PCC sends a request which identifies end nodes. The end nodes can support a plurality of possible values of a transmission parameter, such as modulation format or Forward Error Correction (FEC) type. The PCE computes a path between the end nodes and sends a reply to the PCC. The reply identifies the path between the end nodes and identifies a selected value of the transmission parameter for the computed path. The reply can comprise a spectrum assignment for the path. The reply can be a PCE Communication Protocol (PCEP) Reply message.

摘要翻译： 路径计算客户机（PCC）可以请求路径计算元件（PCE）来计算穿过波长交换光网络的路径。 PCC发送一个标识终端节点的请求。 端节点可以支持传输参数的多个可能值，例如调制格式或前向纠错（FEC）类型。 PCE计算端节点之间的路径，并向PCC发送回复。 回复标识了结束节点之间的路径，并标识了所计算的路径的传输参数的选定值。 答复可以包括路径的频谱分配。 该回复可以是PCE通信协议（PCEP）回复消息。

公开(公告)号：US09490927B2

公开(公告)日：2016-11-08

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。

公开(公告)号：US20140023364A1

公开(公告)日：2014-01-23

申请号：US13825017

申请日：2010-10-15

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

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

IPC分类号： H04Q11/00

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。

公开(公告)号：US20110229122A1

公开(公告)日：2011-09-22

申请号：US13119520

申请日：2008-09-19

申请人： Piero Castoldi ,  Filippo Cugini ,  Nicola Sambo ,  Isabella Cerutti ,  Alessio Giorgetti ,  Luca Valcarenghi

发明人： Piero Castoldi ,  Filippo Cugini ,  Nicola Sambo ,  Isabella Cerutti ,  Alessio Giorgetti ,  Luca Valcarenghi

IPC分类号： H04B10/00

CPC分类号： H04Q11/0062 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0279 ,  H04J14/0284 ,  H04Q2011/0073 ,  H04Q2011/0081 ,  H04Q2011/0086

摘要： A method of restoration for an optical network, the network comprising a plurality of nodes (40, 50) interconnected with each other by optical links (130), a subset of the nodes (40) each comprising a regenerator, the method comprising: storing (160) a quality of transmission parameter and a regenerator availability at each of the plurality of nodes (40, 50); notifying (170) a branch node (110) in response to detecting a failure (140) within a link (130) forming part of the path between a source node (20) and a destination node (30), wherein the branch node (110) is the neighbouring upstream node (40, 50) upstream of the link failure (140), the branch node (110) having a regenerator; the branch node (110) computing (190) a restoration segment (100) to a merge node (120) having a regenerator which is a neighbouring downstream node which is downstream of the link failure (140), the restoration path (100) being based on the quality of transmission parameter and regenerator availability information; restoring (180) the path between the source node (20) and the destination node (30) using the restoration segment (100).

摘要翻译： 一种用于光网络的恢复方法，所述网络包括通过光链路（130）彼此互连的多个节点（40,50），每个节点（40）的子集包括再生器，所述方法包括：存储 （160）在所述多个节点（40,50）中的每个节点处的传输参数的质量和再生器可用性; 响应于检测到形成源节点（20）和目的地节点（30）之间的路径的一部分的链路（130）内的故障（140），通知（170）分支节点（110），其中分支节点 110）是链路故障（140）上游的相邻上游节点（40,50），分支节点（110）具有再生器; 所述分支节点（110）向具有作为在所述链路故障（140）的下游的相邻下游节点的再生器的合并节点（120）计算（190）恢复段（100），所述恢复路径（100） 基于传输参数和再生器可用性信息的质量; 使用恢复段（100）恢复（180）源节点（20）和目的地节点（30）之间的路径。

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.

公开(公告)号：US09338529B2

公开(公告)日：2016-05-10

申请号：US14240232

申请日：2011-09-30

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 ,  H04Q11/00

CPC分类号： H04Q11/0062 ,  H04J14/0224 ,  H04J14/0227 ,  H04J14/0257 ,  H04J14/026 ,  H04J14/0267 ,  H04J14/0269 ,  H04J14/0271 ,  H04Q2011/0086

摘要： Routing and bandwidth assignment of new paths of different bandwidths, occupying different numbers of adjacent frequency slots in a wavelength switched optical network, involves selecting a route, and assigning a set of adjacent frequency slots. The assignment can place wider bandwidth ones of the new paths at an opposite end of a spectrum of the available frequency slots, to an end where narrower bandwidth ones are placed. A size of sets of available adjacent slots remaining after the assignment is likely to be increased, compared to a conventional first fit assignment. A wider subsequent new path can sometimes be accommodated along all or some of the route and thus the blocking probability can be lowered. The selecting of which of the possible routes to use can be made dependent on which has more sets of available adjacent frequency slots, or which has a wider gap between occupied slots.

摘要翻译： 在波长交换光网络中占用不同数量的相邻频率槽的不同带宽的新路径的路由和带宽分配涉及选择路由和分配一组相邻频率时隙。 该分配可以将更宽的带宽的新路径放置在可用频率隙的频谱的另一端，到达放置较窄带宽的端点。 与传统的第一拟合分配相比，分配之后剩余的可用相邻狭缝的集合的大小可能增加。 有时可以沿着所有或某些路线容纳更宽的后续新路径，从而可以降低阻塞概率。 可以选择要使用哪些可能的路由取决于哪些具有更多的可用相邻频率槽的集合，或者在占用时隙之间具有更宽的间隙。

公开(公告)号：US09325446B2

公开(公告)日：2016-04-26

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： H04J14/00 ,  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。

公开(公告)号：US09473834B2

公开(公告)日：2016-10-18

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： H04J14/02 ,  H04Q11/00 ,  H04L12/721 ,  H04L27/26

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。

公开(公告)号：US20140341572A1

公开(公告)日：2014-11-20

申请号：US14240232

申请日：2011-09-30

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 ,  H04J14/0224 ,  H04J14/0227 ,  H04J14/0257 ,  H04J14/026 ,  H04J14/0267 ,  H04J14/0269 ,  H04J14/0271 ,  H04Q2011/0086

摘要： Routing and bandwidth assignment of new paths of different bandwidths, occupying different numbers of adjacent frequency slots in a wavelength switched optical network, involves selecting a route, and assigning a set of adjacent frequency slots. The assignment can place wider bandwidth ones of the new paths at an opposite end of a spectrum of the available frequency slots, to an end where narrower bandwidth ones are placed. A size of sets of available adjacent slots remaining after the assignment is likely to be increased, compared to a conventional first fit assignment. A wider subsequent new path can sometimes be accommodated along all or some of the route and thus the blocking probability can be lowered. The selecting of which of the possible routes to use can be made dependent on which has more sets of available adjacent frequency slots, or which has a wider gap between occupied slots.

摘要翻译： 在波长交换光网络中占用不同数量的相邻频率槽的不同带宽的新路径的路由和带宽分配涉及选择路由和分配一组相邻频率时隙。 该分配可以将更宽的带宽的新路径放置在可用频率隙的频谱的另一端，到达放置较窄带宽的端点。 与传统的第一拟合分配相比，分配之后剩余的可用相邻狭缝的集合的大小可能增加。 有时可以沿着所有或某些路线容纳更宽的后续新路径，从而可以降低阻塞概率。 可以选择要使用哪些可能的路由取决于哪些具有更多的可用相邻频率槽的集合，或者在占用时隙之间具有更宽的间隙。

公开(公告)号：US08855483B2

公开(公告)日：2014-10-07

申请号：US13119520

申请日：2008-09-19

申请人： Piero Castoldi ,  Filippo Cugini ,  Nicola Sambo ,  Isabella Cerutti ,  Alessio Giorgetti ,  Luca Valcarenghi

发明人： Piero Castoldi ,  Filippo Cugini ,  Nicola Sambo ,  Isabella Cerutti ,  Alessio Giorgetti ,  Luca Valcarenghi

IPC分类号： H04B10/00 ,  H04J14/02 ,  H04Q11/00

CPC分类号： H04Q11/0062 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0279 ,  H04J14/0284 ,  H04Q2011/0073 ,  H04Q2011/0081 ,  H04Q2011/0086

摘要： A method of restoration for an optical network, the network comprising a plurality of nodes (40, 50) interconnected with each other by optical links (130), a subset of the nodes (40) each comprising a regenerator, the method comprising: storing 160) a quality of transmission parameter and a regenerator availability at each of the plurality of nodes (40, 50); notifying (170) a branch node (110) in response to detecting a failure (140) within a link (130) forming part of the path between a source node (20) and a destination node (30), wherein the branch node (110) is the neighbouring upstream node (40, 50) upstream of the link failure (140), the branch node (110) having a regenerator; the branch node (110) computing (190) a restoration segment (100) to a merge node (120) having a regenerator which is a neighbouring downstream node which is downstream of the link failure (140), the restoration path (100) being based on the quality of transmission parameter and regenerator availability information; restoring (180) the path between the source node (20) and the destination node (30) using the restoration segment (100).

摘要翻译： 一种用于光网络的恢复方法，所述网络包括通过光链路（130）彼此互连的多个节点（40,50），每个节点（40）的子集包括再生器，所述方法包括：存储 160）多个节点（40,50）中的每个节点的传输参数的质量和再生器可用性; 响应于检测到形成源节点（20）和目的地节点（30）之间的路径的一部分的链路（130）内的故障（140），通知（170）分支节点（110），其中分支节点 110）是链路故障（140）上游的相邻上游节点（40,50），分支节点（110）具有再生器; 所述分支节点（110）向具有作为在所述链路故障（140）的下游的相邻下游节点的再生器的合并节点（120）计算（190）恢复段（100），所述恢复路径（100） 基于传输参数和再生器可用性信息的质量; 使用恢复段（100）恢复（180）源节点（20）和目的地节点（30）之间的路径。