公开(公告)号：US20180167335A1

公开(公告)日：2018-06-14

申请号：US15565508

申请日：2016-04-01

Applicant: ZTE CORPORATION

Inventor： Gang LU

IPC: H04L12/911 ,  H04L12/803 ,  H04L12/721 ,  H04L12/815

Abstract: Disclosed is a state reporting control method, which is applied to a stateful path computation element and includes: setting and notifying an initial subscription state of an LSP state report of a PCC node in a process of session initialization with the PCC node; and sending a subscription update request to the PCC node to subscribe or unsubscribe the LSP state report of the PCC node.

公开(公告)号：US20170366269A1

公开(公告)日：2017-12-21

申请号：US15535412

申请日：2015-10-23

Applicant: ZTE CORPORATION

Inventor： Gang LU

IPC: H04B10/27 ,  H04J14/02

CPC classification number: H04B10/27 ,  H04J14/0227 ,  H04L45/28 ,  H04L45/50 ,  H04L45/62 ,  H04L47/724

Abstract: The present document discloses a method and a system for restoring an optical layer service. The method includes: determining wavelength resource occupancy information of an inner-link of the node and an optical layer link where the node is located; herein the wavelength resource occupancy information includes resource occupancy state information of a wavelength resource corresponding to a Hold Priority; and flooding the wavelength resource occupancy information in a network where the node is located.

公开(公告)号：US20160269280A1

公开(公告)日：2016-09-15

申请号：US15031548

申请日：2014-05-16

Applicant: ZTE CORPORATION

Inventor： Gang LU ,  Zhihong WANG

IPC: H04L12/717 ,  H04L12/715 ,  H04L12/723

CPC classification number: H04L45/42 ,  H04L45/04 ,  H04L45/50 ,  H04L45/64 ,  H04L67/28

Abstract: The disclosure provides a method, device and system for discovering a PCE. A proxy server corresponds to PCEs of the same layer, wherein a method applied to the proxy server includes that: state information of all PCEs of a current layer is stored; a first request for querying state information of a PCE of the current layer is received; and the state information to-be-queried is provided to an initiator of the first request. On the basis of an existing multi-layer PCE architecture, the disclosure enables all PCEs of the same layer to correspond to a proxy server, and cross-layer/grade PCE information can be obtained by interaction between proxy servers. Furthermore, the method simplifies a mechanism for querying PCE state information and a proxy server is responsible for transmitting the state information, thus largely saving network broadband resources. In the meanwhile, the method is easy to implement and has high applicability.

Abstract translation: 本公开提供了一种用于发现PCE的方法，设备和系统。 代理服务器对应于同一层的PCE，其中应用于代理服务器的方法包括：存储当前层的所有PCE的状态信息; 接收到对当前层的PCE的状态信息的查询的第一请求; 并且将要查询的状态信息提供给第一请求的发起者。 在现有的多层PCE架构的基础上，本公开使得同一层的所有PCE对应于代理服务器，并且可以通过代理服务器之间的交互获得跨层/级别的PCE信息。 此外，该方法简化了用于查询PCE状态信息的机制，代理服务器负责传输状态信息，从而大大节省了网络宽带资源。 同时，该方法易于实现，适用性高。

公开(公告)号：US20180048557A1

公开(公告)日：2018-02-15

申请号：US15321738

申请日：2014-10-16

Applicant: ZTE CORPORATION

Inventor： Xiaojian LI ,  Feng SHI ,  Gang LU ,  Wei SHENG

IPC: H04L12/715 ,  H04L12/735

CPC classification number: H04L45/04 ,  H04L45/128 ,  H04L45/1283 ,  H04L45/1287 ,  H04L45/42

Abstract: A method for acquiring a cross-domain separation path includes: when receiving a cross-domain separation path computation request, acquiring K pairs of candidate separation domain sequences according to a cross-domain network abstraction topology; traversing the K pairs of sequences, generating corresponding intra-domain path computation requests for various domains through which candidate separation domain sequences in the network pass to transmit; when receiving at least one pair of intra-domain paths for the request, configuring each of the at least one pair of intra-domain paths to a corresponding position in the K pairs of sequences, to form K pairs of candidate cross-domain separation paths; and determining one pair of cross-domain separation paths from the K pairs of paths as a computation result of the cross-domain separation path computation request to transmit. There are also disclosed another method for acquiring a cross-domain separation path, a path computation element, and a computer storage medium.

公开(公告)号：US20170324649A1

公开(公告)日：2017-11-09

申请号：US15525075

申请日：2015-07-24

Applicant: ZTE CORPORATION

Inventor： Gang LU

IPC: H04L12/721 ,  H04L29/08 ,  H04L12/28

CPC classification number: H04L45/14 ,  H04L12/28 ,  H04L29/08081 ,  H04L45/04 ,  H04L45/64 ,  H04L67/00

Abstract: The document discloses a method for invoking a routing algorithm, an SDN-OAF, and an SDN controller. The method includes pre-configuring a customized routing algorithm; an SDN controller receiving a path computation request from an application, invoking a corresponding customized routing algorithm according to information about the customized routing algorithm carried in the path computation request to compute a service path.

公开(公告)号：US20160182381A1

公开(公告)日：2016-06-23

申请号：US14909302

申请日：2015-05-22

Applicant: ZTE CORPORATION

Inventor： Hui LI ,  Gang LU

IPC: H04L12/803

CPC classification number: H04L47/125 ,  H04L12/6418 ,  H04L45/04 ,  H04L45/64

Abstract: Disclosed are a path computation method and a path computation element, applied to a system including two or more path computation elements (PCEs), and in the system, one of the PCEs is a primary PCE, and the other PCEs are secondary PCEs; the method includes: the primary PCE, after receiving a path computation request sent by a path computation client (PCC), selecting one PCE in the system to be the PCE processing this path computation request, and the selected PCE processing the path computation request. When a PCE works as the primary PCE, the PCE includes: a receiving module, configured to receive a path computation request sent by a PCC; a selecting module, configured to select one PCE in the system to be the PCE processing this path computation request after the receiving module receives the path computation request.

Abstract translation: 公开了一种应用于包括两个或多个路径计算元件（PCE）的系统的路径计算方法和路径计算元件，并且在该系统中，一个PCE是主要PCE，而另一个PCE是次要PCE; 该方法包括：主PCE在接收到由路径计算客户端（PCC）发送的路径计算请求之后，选择系统中的一个PCE作为PCE处理该路径计算请求，并且所选择的PCE处理路径计算请求。 当PCE作为主PCE时，PCE包括：接收模块，用于接收由PCC发送的路径计算请求; 选择模块，被配置为在接收模块接收到路径计算请求之后，选择系统中的一个PCE作为PCE处理该路径计算请求。

公开(公告)号：US20170257307A1

公开(公告)日：2017-09-07

申请号：US15322173

申请日：2014-10-13

Applicant: ZTE CORPORATION

Inventor： Gang LU ,  Feng SHI

IPC: H04L12/707 ,  H04L29/08 ,  H04L12/723 ,  H04L12/751

CPC classification number: H04L45/24 ,  H04L45/02 ,  H04L45/04 ,  H04L45/128 ,  H04L45/22 ,  H04L45/50 ,  H04L67/327

Abstract: Disclosed are a method and a device for establishing a multi-domain and dual-home path, herein the method includes: a client network sending information of a first dual-home path and a computation request of a dual-home separating path of the first dual-home path to a parent PCE of a serving network with which the client network is associated; the client network receiving information of the dual-home separating path responded by the parent PCE, herein the information of the dual-home separating path is computed by the parent PCE at least according to the information of the first dual-home path; and the client network establishing a second dual-home path according to the information of the dual-home separating path.

公开(公告)号：US20160006644A1

公开(公告)日：2016-01-07

申请号：US14770931

申请日：2014-02-28

Applicant: ZTE CORPORATION

Inventor： Wenxiang LV ,  Jiayu WANG ,  Gang LU ,  Zhihong WANG ,  Xuping CAO

IPC: H04L12/751 ,  H04L12/24

CPC classification number: H04L45/02 ,  H04L41/12 ,  H04L41/145 ,  H04L41/28 ,  H04L45/42

Abstract: A method and device for long-term storage of cross-domain path information are provided. The method is applied on a stateless PCE. In the method, a first PCE computes a path; a path head node sends, to the first PCE, query information for querying intra-domain path information of the first domain corresponding to a first PATH-KEY, generates, on the basis of a query result returned by the first PCE, a third PATH-KEY having a unique identifier and corresponding to the intra-domain path information of the first domain and stores the third PATH-KEY; the path head node sends, to a head node in a second domain, an inter-domain path establishment signalling comprising the third PATH-KEY and a second PATH-KEY, to make the head node in the second domain send, to a second PCE, query information for querying intra-domain path information of the second domain corresponding to the second PATH-KEY, generate, on the basis of a query result returned by the second PCE, a fourth PATH-KEY having a unique identifier and corresponding to the intra-domain path information of the second domain, and store the fourth PATH-KEY; and, the path head node modifies information of the path from the path head node to the path tail node on the basis of a reverse signalling returned by the path tail node and comprising the third PATH-KEY and the fourth PATH-KEY.

Abstract translation: 提供了跨域路径信息长期存储的方法和装置。 该方法应用于无状态PCE。 在该方法中，第一PCE计算路径; 路径头节点向第一PCE发送用于查询与第一PATH-KEY对应的第一域的域内路径信息的查询信息，基于由第一PCE返回的查询结果生成第三路径 -KEY具有唯一标识符并且对应于第一域的域内路径信息并存储第三路径密钥; 路径头节点向第二域中的头节点发送包括第三PATH-KEY和第二PATH-KEY的域间路径建立信令，以使第二域中的头节点发送到第二PCE 用于查询与第二PATH-KEY相对应的第二域的域内路径信息的查询信息，基于由第二PCE返回的查询结果生成具有唯一标识符并对应于第二PCE的第四路径信息的第四路径密钥 第二域的域内路径信息，并存储第四路径密钥; 并且，路径头节点基于由路径尾节点返回的包括第三PATH-KEY和第四PATH-KEY的反向信令，修改从路径头节点到路径尾节点的路径的信息。

公开(公告)号：US20180269963A1

公开(公告)日：2018-09-20

申请号：US15539598

申请日：2015-12-16

Applicant: ZTE CORPORATION

Inventor： Bikai LI ,  Gang LU ,  Guofang LI

IPC: H04B10/032 ,  H04Q11/00

CPC classification number: H04B10/032 ,  H04L41/0631 ,  H04L41/0663 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0039 ,  H04Q2011/0043 ,  H04Q2011/0045 ,  H04Q2011/0081

Abstract: A method and an apparatus for hot standby of controllers in distributed protection are provided. In some embodiments, the method includes: through an actuator, receiving a message transmitted from each of the controllers; determining the messages transmitted in response to a same fault according to a serial number of each message, maintaining a master-standby relationship of each of the controllers through the messages transmitted in response to the same fault; and executing a corresponding operation according to a message transmitted from a master controller; and in a protocol steady state, performing a master-standby switching if it is determined that a switching condition is met.

公开(公告)号：US20160164715A1

公开(公告)日：2016-06-09

申请号：US14907558

申请日：2014-05-12

Applicant: ZTE CORPORATION

Inventor： Gang LU ,  Xuping CAO

IPC: H04L12/24 ,  H04L12/721

CPC classification number: H04L41/0659 ,  H04L12/6418 ,  H04L41/12 ,  H04L45/12

Abstract: A method for processing a failure of a multi-domain path computation and a Path Computation Element (PCE) are provided. The method for the PCE of a head domain includes: a failed link leading to a failure to compute a path according to a first domain sequence is acquired; the failed link is deleted from a first topology to obtain a second topology; a second domain sequence is determined according to the second topology; and a path computation for the second domain sequence is initiated.

Abstract translation: 提供了一种用于处理多域路径计算和路径计算元素（PCE）的故障的方法。 头域的PCE的方法包括：获取导致根据第一域序列计算路径的故障的故障链路; 从第一拓扑中删除故障链路以获得第二拓扑; 根据第二拓扑确定第二域序列; 并且启动用于第二域序列的路径计算。