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。

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。