发明授权
US07248561B2 Path establishment method for establishing paths of different fault recovery types in a communications network
有权
用于在通信网络中建立不同故障恢复类型的路径的路径建立方法
- 专利标题： Path establishment method for establishing paths of different fault recovery types in a communications network
- 专利标题（中）： 用于在通信网络中建立不同故障恢复类型的路径的路径建立方法
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申请号： US10355169申请日： 2003-01-31
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公开(公告)号： US07248561B2公开(公告)日： 2007-07-24
- 发明人: Osamu Ishibashi , Yoshihiko Suemura
- 申请人： Osamu Ishibashi , Yoshihiko Suemura
- 申请人地址： JP Tokyo
- 专利权人： NEC Corporation
- 当前专利权人： NEC Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Young & Thompson
- 优先权： JP2002-028902 20020206
- 主分类号： H04L1/00
- IPC分类号： H04L1/00
摘要：
In a communications network where multiple shared risk link groups are formed by links having a common risk, unreserved bandwidths are defined corresponding to all SRLG's and a maximum bandwidth of each link is set as an initial value of each of the defined unreserved bandwidths when a working path or a protection path of “1+1” or “1:1” recovery type is requested. When a protection path of “shared” recovery type is requested, unreserved bandwidths are defined corresponding to the SRLG's to which the links of its corresponding working path belong and a maximum bandwidth of each link is set as an initial value to each of the defined unreserved bandwidths. The bandwidth of the working or protection path is subtracted from each of the unreserved bandwidths. The request is rejected if a minimum of the subtracted values is smaller than a threshold.
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