公开(公告)号：US11374675B2

公开(公告)日：2022-06-28

申请号：US15635428

申请日：2017-06-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Mohammad Mehdi Mansouri Rad ,  Hamid Mehrvar

IPC: H04B10/296 ,  H04J14/02

Abstract: In some examples, an optical node includes transition logic to: receive an indication of a data channel to be added across an optical medium, the data channel to occupy a portion of an optical spectrum; in response to a receipt of the indication, divide the data channel into a plurality of sub-channels; and sequentially add each of the plurality of sub-channels across the optical medium in a particular order.

公开(公告)号：US09661405B2

公开(公告)日：2017-05-23

申请号：US14275320

申请日：2014-05-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hamid Mehrvar ,  Eric Bernier ,  Peter Ashwood-Smith

IPC: H04J14/00 ,  H04B10/20 ,  H04B10/00 ,  H04B17/00 ,  H04Q11/00 ,  H04L12/931

CPC classification number: H04Q11/0005 ,  H04L49/356 ,  H04Q11/0066 ,  H04Q2011/0033 ,  H04Q2011/0037 ,  H04Q2011/0045 ,  H04Q2011/005

Abstract: In one embodiment, method of photonic packet switching includes receiving, by a photonic switching fabric from a first top-of-rack (TOR) switch, a destination port request corresponding to a first photonic packet and a first period of time, where the destination port request includes a first output port and determining whether the first output port is available during the first period of time. The method also includes receiving, by the photonic switching fabric from the first TOR switch, the first photonic packet and routing the first photonic packet to the first output port when the first output port is available during the first period of time. Additionally, the method includes routing the first photonic packet to an alternative output port when the first output port is not available.

公开(公告)号：US09658403B2

公开(公告)日：2017-05-23

申请号：US14695970

申请日：2015-04-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hamid Mehrvar ,  Huixiao Ma ,  Eric Bernier

IPC: G02B6/35 ,  H04Q11/00

CPC classification number: G02B6/3546 ,  G02B6/3548 ,  G02B6/3556 ,  G02B6/3558 ,  H04Q11/0003 ,  H04Q11/0005 ,  H04Q2011/0024 ,  H04Q2011/0039 ,  H04Q2011/0045 ,  H04Q2011/005 ,  H04Q2011/0054

Abstract: Embodiments are provided for scalable photonic packet fabric architectures using photonic integrated circuit switches. The architectures use compact size silicon photonic circuits that can be arranged in a combined centralized and distributed manner. In an embodiment, an optical switch structure comprises a plurality of core photonic based switches and a plurality of photonic interface units (PIUs) optically coupled to the core photonic based switches and to a plurality of groups of top-of-rack switches (TORs). Each PIU comprises a N×N silicon photonic (SiP) switch optically coupled to a group of TORs associated with the PIU from the groups of TORs, where N is a number of the TORs in each group. The PIU also comprises a plurality of 1×P SiP switches coupled to the group of TORs associated with the PIU and to the core photonic based switches, where P is a number of the core photonic based switches.

公开(公告)号：US20160381443A1

公开(公告)日：2016-12-29

申请号：US14844857

申请日：2015-09-03

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hamid Mehrvar ,  Yi Qian

IPC: H04Q11/00 ,  H04L12/725 ,  H04B10/079

CPC classification number: H04L49/357 ,  H04L45/62 ,  H04L47/70 ,  H04Q2011/0049 ,  H04Q2011/0081

Abstract: A method and apparatus for routing signals through a photonic switch are provided. Optical Signal-to-Noise Ratio (OSNR) requirements for signals to be concurrently routed through the switch are determined, and incoming signal routing requests are blocked when routing same would violate OSNR requirements. Blocking may occur when a maximum allowed number M of lightpaths of same wavelength would be exceeded by admitting the request. Otherwise, signals are routed along a lightpath which satisfies the OSNR requirements. Cell Extinction Ratio in conjunction with OSNR requirements can be used to determine M. Switching cells can potentially accommodate multiple lightpaths of different wavelengths, but regular switching cells may be inhibited from accommodating multiple lightpaths of same wavelength. Routing solutions which maximize both cell sharing and cell packing may be sought. Routes that violate crosstalk limitation conditions are inhibited.

Abstract translation: 提供了一种通过光子开关路由信号的方法和装置。 确定通过交换机同时路由的信号的光信噪比（OSNR）要求，当路由相同时，传入信号路由请求将被阻止，这将违反OSNR要求。 通过接受请求可以超过相同波长的光路的最大允许数量M时，可能会发生阻塞。 否则，信号沿满足OSNR要求的光路路由。 细胞消光比结合OSNR要求可以用于确定M.切换单元可以潜在地适应不同波长的多个光路，但是可以禁止规则的开关单元容纳相同波长的多个光路。 可以寻求使细胞共享和细胞包装最大化的路由解决方案。 违反串扰限制条件的路由被禁止。

公开(公告)号：US09491120B2

公开(公告)日：2016-11-08

申请号：US14018273

申请日：2013-09-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hamid Mehrvar ,  Yi Qian ,  Patrick Dumais ,  Dominic John Goodwill ,  Eric Bernier

IPC: H04J1/12 ,  H04L12/947 ,  H04Q11/00

CPC classification number: H04L49/25 ,  H04Q11/0005 ,  H04Q2011/0049 ,  H04Q2011/0054

Abstract: Crosstalk can be suppressed in photonic switching fabrics by activating unused photonic elements in a manner that manipulates the inactive connections and inhibits the propagation of cross-talk over the switching fabric. For example, unused photonic elements can be set to a cross or bar configuration to block first and second order crosstalk from propagating to the output ports, thereby reducing noise in the output signals. All of the unused elements can be activated in order to maximize crosstalk suppression. Alternatively, fewer than all of the unused elements may be activated to achieve a balance between crosstalk suppression and power conservation. Photonic switch architectures can be configured to use pre-determined cross-talk suppression maps (e.g., patterns of activated unused cells) for the various switching configurations, which may be computed using a recursive algorithm.

Abstract translation: 通过激活未使用的光子元件，可以通过操纵无效连接并抑制交换结构上的串扰传播的方式来抑制光交换结构中的串扰。 例如，未使用的光子元件可以设置为交叉或条形配置，以阻止第一和第二级串扰从传播到输出端口，从而降低输出信号中的噪声。 可以激活所有未使用的元件，以最大化串扰抑制。 或者，可以激活少于所有未使用的元件以实现串扰抑制和功率节省之间的平衡。 光子开关架构可以被配置为使用可以使用递归算法计算的各种切换配置的预定串扰抑制映射（例如，激活的未使用小区的模式）。

公开(公告)号：US09462359B2

公开(公告)日：2016-10-04

申请号：US14516211

申请日：2014-10-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hamid Mehrvar ,  Eric Bernier

IPC: H04Q11/00

CPC classification number: H04Q11/0062 ,  H04Q11/0005 ,  H04Q11/0066 ,  H04Q2011/0073 ,  H04Q2011/0092

Abstract: In one embodiment, optical node includes an input port configured to receive an input optical frame and a first optical switch coupled to the input port, where the first optical switch is configured to remove the input optical frame to produce a removed input optical frame when an address of the input optical frame is a node address of the optical node and to pass the input optical frame to a second optical switch when an address of the input optical frame differs from the address of the optical node. The optical node also includes the second optical switch coupled to the first optical switch, where the second optical switch is configured to output the input optical frame to an output port when the address of the input optical frame is not the node address of the optical node and the address of the input optical frame is not an empty address.

Abstract translation: 在一个实施例中，光节点包括被配置为接收输入光学帧的输入端口和耦合到输入端口的第一光学开关，其中第一光学开关被配置为去除输入光学帧以产生去除的输入光学框架，当 输入光帧的地址是光节点的节点地址，并且当输入光帧的地址与光节点的地址不同时，将输入光帧传递到第二光开关。 光节点还包括耦合到第一光开关的第二光开关，其中第二光开关被配置为当输入光帧的地址不是光节点的节点地址时将输入光帧输出到输出端口 并且输入光学帧的地址不是空地址。

公开(公告)号：US11799580B2

公开(公告)日：2023-10-24

申请号：US17846663

申请日：2022-06-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hamid Mehrvar ,  Hui Xiang

IPC: H04J14/02 ,  H04Q11/00

CPC classification number: H04J14/021 ,  H04J14/0215 ,  H04Q11/0005 ,  H04Q2011/0007

Abstract: Methods and apparatus for a reconfigurable optical add-drop multiplexer (ROADM) cluster node are provided. In some embodiments, the ROADM cluster node includes a set of g line chassis for performing line functionality. In some embodiments, the ROADM cluster node further includes a set of h add-drop chassis for performing add-drop functionality. In some embodiments, each of the g line chassis includes a set of N line cards and a set of M interconnect cards. In some embodiments, the ROADM cluster node further includes a set of M interconnect chassis configured for interconnecting each line chassis to each other line chassis. In some embodiments, the set of M interconnect chassis is further configured for interconnecting each line chassis to each of the h add-drop chassis. In some embodiments, the ROADM cluster node separates the line functionality and add-drop functionality. In some embodiments, 1.15N≤M≤1.5N.

公开(公告)号：US20170064417A1

公开(公告)日：2017-03-02

申请号：US15347448

申请日：2016-11-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hamid Mehrvar

IPC: H04Q11/00 ,  H04L12/947

CPC classification number: H04Q11/0005 ,  H04J14/0212 ,  H04L49/25 ,  H04Q11/0003 ,  H04Q2011/0039 ,  H04Q2011/0049 ,  H04Q2011/005 ,  H04Q2011/0054 ,  H04Q2011/0058

Abstract: Hybrid dilated Benes photonic switching architectures employ an arrangement of two-by-one (2×1) photonic and two-by-two (2×2) photonic elements to enjoy improved cross-talk performance while maintaining moderate cell counts. A jumpsuit switch optical network node architecture comprising multiple stages may operate more efficiently than single stage switching fabrics, by enabling manipulation of connectivity in some stages to achieve load balancing over other stages. Specifically, a first stage of switching fabrics connected to input ports of the optical node may be manipulated to load balance incoming signals over a second stage of switching fabrics coupled to output ports of the optical node. Additionally, a third stage of switching fabrics connected to add ports of the optical node may be manipulated to load balance added optical signals over the second stage of switching fabrics.

Abstract translation: 混合扩张的Benes光子切换架构采用二乘（2×1）光子和二乘二（2×2）光子元件的布置，以在保持中等细胞计数的同时享受改善的串扰性能。 包括多个级的连接开关光网络节点架构可以比单级交换结构更有效地操作，通过在一些阶段中实现连接的操作以在其他阶段实现负载平衡。 具体地，可以操纵连接到光节点的输入端口的交换结构的第一级，以在耦合到光节点的输出端口的交换结构的第二级上负载平衡输入信号。 此外，可以操纵连接到添加光节点的端口的交换结构的第三级，以在交换结构的第二级上负载平衡添加的光信号。

公开(公告)号：US09584885B2

公开(公告)日：2017-02-28

申请号：US14246711

申请日：2014-04-07

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hamid Mehrvar

IPC: H04Q11/00 ,  H04J14/02

CPC classification number: H04Q11/0066 ,  H04J14/0258 ,  H04J14/0269 ,  H04Q11/0005 ,  H04Q2011/0033 ,  H04Q2011/0039 ,  H04Q2011/0045 ,  H04Q2011/005 ,  H04Q2011/0064

Abstract: In one embodiment, a method of photonic frame scheduling includes receiving, by a photonic switching fabric from a top of rack (TOR) switch, a frame request requesting a time slot for switching an optical frame to an output port of a photonic switch of the photonic switching fabric and determining whether the output port of the photonic switch is available during the time slot, and generating a contention signal including a grant or a rejection, in accordance with the determining. Also, the method includes assigning the time slot to the TOR switch for the output port of the photonic switch, when the contention signal includes the grant, transmitting, by the photonic switching fabric to the TOR switch, the contention signal and receiving, by the photonic switching fabric from the TOR switch, the optical frame during the time slot, when the contention signal includes the grant.

Abstract translation: 在一个实施例中，一种光子帧调度的方法包括：从机架顶部（TOR）开关的光子交换结构接收请求用于将光学帧切换到光学开关的输出端口的时隙的帧请求 光子交换结构，并且确定在该时隙期间光子交换机的输出端口是否可用，以及根据确定产生包括授权或拒绝的竞争信号。 此外，该方法包括将时隙分配给光子开关的输出端口的TOR开关，当竞争信号包括许可时，光子交换结构向TOR开关发送竞争信号并通过 来自TOR开关的光子交换结构，在时隙期间的光学帧，当争用信号包括授权时。

公开(公告)号：US09456260B2

公开(公告)日：2016-09-27

申请号：US14530192

申请日：2014-10-31

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hamid Mehrvar ,  Yi Qian ,  Patrick Dumais ,  Dominic John Goodwill ,  Eric Bernier

IPC: H04J1/12 ,  H04Q11/00 ,  H04L12/947 ,  H04L12/931

CPC classification number: H04Q11/0005 ,  H04L49/25 ,  H04L49/40 ,  H04Q2011/0049

Abstract: Recursive optimization algorithms can be used to determine which idle photonic switching elements to configure in N×N switching fabrics to achieve crosstalk suppression. Different algorithms are used to achieve different levels of optimization. Embodiment full optimization techniques may configure all inactive cells to reduce crosstalk, and consequently may provide the best noise performance and highest power usage. Partial optimizations may configure fewer than all inactive cells to reduce crosstalk, and may provide sub-optimal noise performance at lower power usages. Differential partial optimization algorithms configure inactive cells in different stages of a photonic switching fabric. Fewer than all cells in a given stage may be configured by some algorithms.

Abstract translation: 可以使用递归优化算法来确定在N×N个交换结构中配置的空闲光子交换元件以实现串扰抑制。 使用不同的算法来实现不同级别的优化。 实施例的全优化技术可以配置所有非活动单元以减少串扰，从而可以提供最佳的噪声性能和最高功率使用。 部分优化可以配置少于所有非活动单元以减少串扰，并且可以在较低功率使用下提供次优的噪声性能。 差分部分优化算法在光子交换结构的不同阶段配置非活动单元。 可以通过一些算法来配置给定阶段中的所有单元。