发明名称 |
Self-healing line switched ring for ATM traffic |
摘要 |
The invention provides for a method for transporting a SONET formatted asynchronous transfer mode (ATM) signal and/or a synchronous transfer mode (STM) signal on a line switched ring over a unidirectional path. The SONET formatted ATM signal comprises cells mapped into a STS-Mc or mxSTS-1s while the STM signal comprises STS-1s/VTs mapped STS-W. A unidirectional line switched ring is provided for transporting the STM STS-W using a unidirectional path switched protection protocol and the ATM STS-Mc using a unidirectional line switched protection protocol. A ring node comprises input and output ring interfaces, an STS management block, an ATM cell management block, and a non-ATM payload management block. The STS management block routes the traffic to the ATM cell management block and to the non-ATM payload management block, according to the traffic type. The STS management block also provides the UPSR protection for the STS-1s and ULSR protection for the STS-Mc. The ATM cell management block maps the add ATM cells received from the ATM ports into the STS-Mc signal, and delineates the cells from the STS-Mc to present them to the ATM ports. The non-ATM payload management block routes STM VTs or STS-1s to/from the non-ATM ports.
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申请公布号 |
US6256292(B1) |
申请公布日期 |
2001.07.03 |
申请号 |
US19970783869 |
申请日期 |
1997.01.16 |
申请人 |
NORTEL NETWORKS CORPORATION |
发明人 |
ELLIS DONALD RUSSELL;ALLEN BRENT E.;MARTIN DAVID WRIGHT;SOKOLOWSKI EDWARD RYSZARD;MCEACHERN PATRICK M. |
分类号 |
H04J3/00;H04J3/08;H04L12/437;H04L12/56;H04Q11/04;(IPC1-7):H04L1/22;H04L12/26 |
主分类号 |
H04J3/00 |
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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