公开(公告)号：US20150163125A1

公开(公告)日：2015-06-11

申请号：US14386151

申请日：2012-04-05

申请人： Diego Caviglia ,  Giulio Bottari ,  Daniele Ceccarelli

发明人： Diego Caviglia ,  Giulio Bottari ,  Daniele Ceccarelli

IPC分类号： H04L12/751 ,  H04L12/721 ,  H04L12/723

CPC分类号： H04L45/02 ,  H04L41/12 ,  H04L45/04 ,  H04L45/26 ,  H04L45/42 ,  H04L45/44 ,  H04L45/50

摘要： A network architecture is provided for enabling end-to-end paths to be computed across a plurality of network domains. The network architecture comprises a plurality of child path computation elements associated with a plurality of respective network domains, each child path computation element adapted to compute a path segment within its respective network domain. A parent path computation element adapted to compute an end-to-end path across a plurality of network domains in conjunction with the plurality of respective child path computation elements.

摘要翻译： 提供了一种网络架构，用于跨多个网络域计算端到端路径。 网络架构包括与多个相应网络域相关联的多个子路径计算元件，每个子路径计算元件适于计算其各自网络域内的路径段。 父路径计算元件，适于结合多个相应的子路径计算元件计算跨多个网络域的端到端路径。

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：US20120287948A1

公开(公告)日：2012-11-15

申请号：US13508406

申请日：2010-01-18

申请人： Stefano Ruffini ,  Giulio Bottari ,  Manuel Nardelli

发明人： Stefano Ruffini ,  Giulio Bottari ,  Manuel Nardelli

IPC分类号： H04J3/06

CPC分类号： H04J3/0658 ,  H04J3/0641 ,  H04J3/0682

摘要： Configuring a node (410, A-I, L-O) of a synchronization network, involves determining information about synchronization sources of a plurality of synchronization trails for passing synchronization information from the synchronization source (A, L, O, PRC) to the node to provide a synchronization reference. After determining automatically (210, 230, 330, 335, 340) synchronization transmission characteristics of trails (EF, FG, GH, HM, MN, OF, FI, IH) which use packet-based communication, the trails are compared automatically (240, 370), using their source information and their synchronization transmission characteristics, for selecting which of these trails to use for providing the synchronization reference for the node (N). Compared to selections made based on source alone, using the synchronization transmission characteristics of the packet based parts can enable a better choice of trail, and can enable comparison with synchronous type trails, and so enable hybrid synchronization networks to be configured and maintained.

摘要翻译： 配置同步网络的节点（410，AI，LO）涉及确定关于用于将同步信息从同步源（A，L，O，PRC）传递到节点的多个同步轨迹的同步源的信息，以提供 同步参考。 在使用基于分组通信的路径（EF，FG，GH，HM，MN，OF，FI，IH）的自动确定（210,230,330,335,340）同步传输特性之后，路径被自动比较（240 ，370），使用其源信息及其同步传输特性，用于选择用于为节点（N）提供同步参考的这些路径中的哪些路径。 与基于源的选择相比，使用基于分组的部件的同步传输特性可以更好地选择跟踪，并且可以与同步类型跟踪进行比较，从而使得能够配置和维护混合同步网络。

公开(公告)号：US20120163390A1

公开(公告)日：2012-06-28

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。

公开(公告)号：US20080144993A1

公开(公告)日：2008-06-19

申请号：US11572467

申请日：2005-07-20

申请人： Giulio Bottari ,  Fabio Cavaliere

发明人： Giulio Bottari ,  Fabio Cavaliere

IPC分类号： G02B6/12

CPC分类号： H04B10/2935

摘要： A method for optimisation of the number and location of regenerative or non-regenerative repeaters in a WDM link made up of N spans connected in a succession of N−1 intermediate sites to form link sections separated by sites containing regenerative repeaters, comprises a step for defining the number of regenerative repeaters needed and giving them a first location. Said step comprises the phases of defining targets OSNRs (VOSNRT) as a function of the number of spans and the type of fibre used in the spans, and defining a possible section between an initial site and a final site, appraising a metric function VM for said possible section obtained as a function of the difference between the OSNR (VOSNR) at the final end of the first span of said possible section and the corresponding target OSNR (VOSNRT) given by the number of spans in said possible section. If the appraised metric function VM satisfies an established quality parameter, add to the possible section the following span in the link and again appraise the metric function for said new possible section obtained as a function of the difference between the OSNR (VOSNR) at the final end of the first span of the possible section and the corresponding target OSNR (VOSNRT) with the new number of spans in the possible section. Said steps are repeated iteratively while adding spans to the possible section until the metric function VM no longer satisfies the quality parameter and one returns at the end site preceding the last span added and positions a regenerator in said site. The procedure is repeated until the end of the new section is identified or to exhaustion of the spans of the link.

摘要翻译： 一种用于优化在连续N-1个中间站点中连接的N个跨度组成的WDM链路中的再生或非再生中继器的数量和位置的方法，以形成由包含再生中继器的站点分离的链路段，包括步骤 定义所需的再生中继器的数量并给予它们第一个位置。 所述步骤包括定义目标OSNR（VOSNRT）的阶段，其作为跨度的数量和在跨度中使用的光纤的类型的函数，并且定义初始站点和最终站点之间的可能部分，评估度量函数VM 所述可能部分是根据所述可能部分的第一跨度的最终端的OSNR（VOSNR）与由所述可能部分中的跨度数给出的相应目标OSNR（VOSNRT）之间的差异而获得的。 如果评估度量函数VM满足已建立的质量参数，则在链路中添加以下跨度的可能部分，并再次评估所获得的所述新可能部分的度量函数作为最终的OSNR（VOSNR）之间的差异的函数 可能部分的第一个跨度的结束和相应的目标OSNR（VOSNRT）与可能部分中的新的跨度数。 所述步骤重复地重复，同时将跨度添加到可能的部分，直到度量函数VM不再满足质量参数，并且一个在最后一个跨度添加之前的终点站点返回，并且将再生器定位在所述站点中。 重复该过程，直到新部分的结尾被识别或链接的跨度耗尽。

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：US09544050B2

公开(公告)日：2017-01-10

申请号：US14356929

申请日：2011-11-09

申请人： Fabio Cavaliere ,  Giulio Bottari

发明人： Fabio Cavaliere ,  Giulio Bottari

IPC分类号： H04B10/08 ,  H04B10/077 ,  H04J14/02

CPC分类号： H04B10/0775 ,  H04J14/0234 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0282

摘要： A supervisory channel is provided on an optical path (31) between nodes of an optical communication network. The nodes are arranged to use a set of wavelengths allocated for carrying traffic channels. An optical signal (16) which carries a supervisory channel is generated at a supervisory channel transmitter (15) and added (12) to the optical path (31) downstream of an optical amplifier (11). The optical signal (16) has a wavelength which is one of the set of wavelengths allocated for carrying traffic. The method is performed at a time when the wavelength is not being used to carry traffic. An impairment parameter of the received optical signal is measured at a supervisory channel receiver (15). The receiver is a coherent receiver and the impairment parameter is chromatic dispersion or polarization mode dispersion.

摘要翻译： 在光通信网络的节点之间的光路（31）上提供监控信道。 节点被布置成使用分配用于承载业务信道的一组波长。 在监控信道发射机（15）处生成载有监控信道的光信号（16），并将光信号（12）添加到光放大器（11）下游的光路（31）。 光信号（16）具有作为分配用于携带业务的一组波长之一的波长。 该方法是在波长不用于携带业务的时候执行的。 在监控信道接收机（15）处测量所接收的光信号的损伤参数。 接收机是相干接收机，损伤参数是色散或偏振模色散。

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：US09166681B2

公开(公告)日：2015-10-20

申请号：US13879147

申请日：2011-09-13

申请人： Fabio Cavaliere ,  Giulio Bottari ,  Luca Giorgi ,  Stefano Ruffini

发明人： Fabio Cavaliere ,  Giulio Bottari ,  Luca Giorgi ,  Stefano Ruffini

IPC分类号： H04B10/077 ,  H04B10/079 ,  H04B10/07 ,  H04J3/06 ,  H04L12/26 ,  H04J14/02

CPC分类号： H04L43/0864 ,  H04B10/07 ,  H04B10/0775 ,  H04B10/0795 ,  H04B2210/072 ,  H04B2210/078 ,  H04J3/0667 ,  H04J14/0201 ,  H04J14/021 ,  H04J14/0226 ,  H04J14/0267 ,  H04J14/0273 ,  H04J14/0275 ,  H04Q11/0066 ,  H04Q2011/0083

摘要： A method for measuring asymmetry in propagation delay of first and second links which connect a first node to a second node of a communication network. The method comprises measuring (101) a round trip delay of the first link. The round trip delay can be measured by transmitting (102) a test signal from the first node to the second node over the first link and receiving a reply to the test signal from the second node over the first link. The method further comprises measuring (105) a round trip delay of the second link. The round trip delay can be measured by transmitting (106) a test signal to the second node over the second link and receiving a reply to the test signal from the second node over the second link. A difference in the propagation delay of the first link with respect to the second link is determined (109) using the measured round trip delays of the first link and the second link.

摘要翻译： 一种用于测量将第一节点连接到通信网络的第二节点的第一和第二链路的传播延迟不对称的方法。 该方法包括测量（101）第一链路的往返延迟。 可以通过在第一链路上将测试信号从第一节点发送（102）到第二节点（102）并通过第一链路接收来自第二节点的测试信号的答复来测量往返延迟。 该方法还包括测量（105）第二链路的往返延迟。 可以通过在第二链路上向第二节点发送（106）测试信号（106）并通过第二链路从第二节点接收对测试信号的回复来测量往返延迟。 使用所测量的第一链路和第二链路的往返延迟来确定第一链路相对于第二链路的传播延迟的差异（109）。