发明名称 |
A hitless path switching apparatus and method |
摘要 |
A hitless path switching method without a bit loss. A bit error in the same digital line signals is continuously monitored independently of a predetermined data blocks of a working path (51) and a protection path (61). If a bit error occurs in the working path and no bit error occurs in the protection path, a switching trigger is produced and the switching from the working path to the protection path is performed on the data block basis. Only correct data are transferred to downstream apparatuses. A reliable hitless switching is achieved not only in response to a failure in its own path, but also in response to a bit error. Using data blocks of one frame length with an indicator for bit error check placed at its top makes an effective switching possible. |
申请公布号 |
EP0696111(B1) |
申请公布日期 |
2004.04.28 |
申请号 |
EP19950201966 |
申请日期 |
1995.07.17 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
KAWASE, NOBUYUKI;YAMABAYASHI, YOSHIAKI;UEMATSU, YOSHIHIKO |
分类号 |
H04B1/74;H04J3/06;H04J3/14;H04L1/22;H04L12/70;H04Q11/04;(IPC1-7):H04B1/74;H04L29/14 |
主分类号 |
H04B1/74 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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