公开(公告)号：EP1029401B1

公开(公告)日：2006-03-08

申请号：EP98948180.9

申请日：1998-09-11

申请人： MCI Worldcom, Inc.

发明人： FEE, John, A. ,  MCKIEL, Frank, A., Jr.

IPC分类号： H04B10/20 ,  H04J14/00 ,  H04J14/02

CPC分类号： H04J14/0227 ,  H04B10/27 ,  H04J14/0201 ,  H04J14/0284

摘要： A system, method and apparatus are described that allow for the updating and transmittal of a low data rate signal providing ancillary network data as a rider on a high data rate optical signal. This subcarrier modulated signal can be processed and updated by using a drop/insert facility (407) without having to alter the high data rate signal component of the data signal. Since the subcarrier signal can be detected by inexpensive equipment without having to detect and demultiplex the high data rate signal, the approach described offers a cost effective solution to the problem of network monitoring. Ancillary network management information can be communicated regardless of the quality or loss of the high data rate signal. In addition, by updating the subcarrier signal rider in a cumulative manner, a complete history of the fiber link the modulated optical signal travels on is provided to network management.

公开(公告)号：EP1057296A1

公开(公告)日：2000-12-06

申请号：EP99908148.2

申请日：1999-02-12

申请人： MCI Worldcom, Inc.

发明人： FEE, John, A. ,  NATHAN, Sridhar

IPC分类号： H04J14/00 ,  H04J14/02 ,  H04J14/08 ,  H04B10/00 ,  H04B10/20

CPC分类号： H04Q11/0062 ,  H04B10/27 ,  H04B10/271 ,  H04B10/275 ,  H04J14/0283 ,  H04J14/0284 ,  H04J14/0295 ,  H04L2012/5627

摘要： A plurality of optical cross-connect switches (OCCS B, OCCS C, OCCS D) are freely interconnected (302, 304, 306, 308, 310, 312) to form a mesh type network (202). At least three of the optical cross-connect switches are switched to form a line-switched ring network, thereby forming a ring/mesh network (202). Simply by changing the switching logic of the optical cross-connect swithes within the ring/mesh network, new rings can be created and existing rings can be modified, thereby providing a great deal of flexibility to make changes to the network as traffic patterns change without incurring hardware costs or significant network downtime. Another advantage of the ring/mesh design approach is that spare capacity within the line-switched ring can be utilized by the mesh network, and spare capacity within the mesh network can be utilized by the line-switched ring, thereby significantly increasing the spare efficiency.

公开(公告)号：EP1029401A2

公开(公告)日：2000-08-23

申请号：EP98948180.9

申请日：1998-09-11

申请人： MCI Worldcom, Inc.

发明人： FEE, John, A. ,  MCKIEL, Frank, A., Jr.

IPC分类号： H04B10/20 ,  H04J14/00

CPC分类号： H04J14/0227 ,  H04B10/27 ,  H04J14/0201 ,  H04J14/0284

摘要： A system, method and apparatus are described that allow for the updating and transmittal of a low data rate signal providing ancillary network data as a rider on a high data rate optical signal. This subcarrier modulated signal can be processed and updated by using a drop/insert facility (407) without having to alter the high data rate signal component of the data signal. Since the subcarrier signal can be detected by inexpensive equipment without having to detect and demultiplex the high data rate signal, the approach described offers a cost effective solution to the problem of network monitoring. Ancillary network management information can be communicated regardless of the quality or loss of the high data rate signal. In addition, by updating the subcarrier signal rider in a cumulative manner, a complete history of the fiber link the modulated optical signal travels on is provided to network management.

公开(公告)号：EP1048133A1

公开(公告)日：2000-11-02

申请号：EP99903079.4

申请日：1999-01-14

申请人： MCI Worldcom, Inc.

发明人： NATHAN, Sridhar ,  FEE, John, A.

IPC分类号： H04B10/08 ,  H04J14/00 ,  H04B10/20 ,  H04J14/02 ,  H04B10/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26 ,  G01R31/08 ,  G06F11/00 ,  G08C15/00

CPC分类号： H04Q11/0062 ,  G06F11/2007 ,  H04B10/032 ,  H04J3/085 ,  H04J14/0283 ,  H04J14/0286 ,  H04J14/0295 ,  H04L1/22 ,  H04L41/0663 ,  H04Q2011/0081 ,  H04Q2011/0092

摘要： A system and method for sharing a spare channel (316) among two or more optical ring networks (202, 204) that have a common span (316). A first optical cross-connect switch OCCS (308) and a first OCCS controller (306) are placed at one end of the span (316) and a second OCCS switch (312) and a second OCCS controller (310) are placed at the other end of the span (316). The first OCCS (308) and the first OCCS controller (306) are coupled to a first ADM (K, A) from each optical ring, and the second OCCS switch (312) and the second OCCS controller (310) are coupled to a second ADM (G, F) from each optical ring. The first OCCS controller (306) receives alarm indications from each ADM that it is coupled to that senses a ring failure. The second OCCS controller (310) receives alarm indications from each ADM that it is coupled to that senses a ring failure. Upon receiving an alarm indication, the first OCCS controller (306) directs the first OCCS switch (308) to optically couple the ADM that originated the alarm indication to the spare channel (316), and the second OCCS controller (310) directs the second OCCS switch (312) to optically couple the ADM that originated the alarm indication to the spare channel (316).

公开(公告)号：EP1048139A1

公开(公告)日：2000-11-02

申请号：EP99903080.2

申请日：1999-01-14

申请人： MCI Worldcom, Inc.

发明人： NATHAN, Sridhar ,  FEE, John, A.

IPC分类号： H04J14/00 ,  H04B10/20

CPC分类号： H04Q11/0062 ,  H04J14/0283 ,  H04J14/0286 ,  H04J14/0295 ,  H04L12/437 ,  H04Q2011/0039 ,  H04Q2011/0081 ,  H04Q2011/0092

摘要： A self-healing optical network carrying traffic between first and second optical linear terminals (NODE A, NODE B, NODE C, NODE D). The self-healing optical network including first, second, and third optical switching units (210, 216, 226, 232), first, second, and third spare optical channels (214, 220, 222, 228), and a working optical channel (212, 218, 224, 230). The first, second, and third optical switching units are coupled in a ring configuration using said first, second, and third spare optical channels. The first and second optical switching units are coupled by the first spare optical channel and by the working optical channel. The first and second optical switching units each direct the traffic between the first and second optical linear terminals along the working optical channel or along the second and third spare optical channels in the event the working optical channel is not available.

公开(公告)号：EP0970551A1

公开(公告)日：2000-01-12

申请号：EP98913026.5

申请日：1998-03-24

申请人： MCI Worldcom, Inc.

发明人： FEE, John, A.

IPC分类号： H01S3/04

CPC分类号： H01S5/141 ,  H01S5/06837 ,  H01S5/0687

摘要： A stable switched multifrequency source (104) is described. The stable switched multifrequency source (104) includes a narrowband reflective optical filter bank (206). This bank (206) includes a plurality of narrowband reflective optical filter devices (208). In one embodiment, the stability and precision of the reflectivity of the narrowband reflective optical filter devices (208) are further enhanced through regulation via temperature (308) and/or bias current (128) based on a comparison of the output wavelength and a precise stable wavelength reference (134). The stable switched multifrequency source (104) also includes an optical switch (202) that is coupled to each of the narrowband reflective optical filter devices (208).

公开(公告)号：EP0970551B1

公开(公告)日：2003-06-04

申请号：EP98913026.5

申请日：1998-03-24

申请人： MCI Worldcom, Inc.

发明人： FEE, John, A.

IPC分类号： H01S5/0687 ,  H01S5/14

CPC分类号： H01S5/141 ,  H01S5/06837 ,  H01S5/0687

摘要： A stable switched multifrequency source (104) is described. The stable switched multifrequency source (104) includes a narrowband reflective optical filter bank (206). This bank (206) includes a plurality of narrowband reflective optical filter devices (208). In one embodiment, the stability and precision of the reflectivity of the narrowband reflective optical filter devices (208) are further enhanced through regulation via temperature (308) and/or bias current (128) based on a comparison of the output wavelength and a precise stable wavelength reference (134). The stable switched multifrequency source (104) also includes an optical switch (202) that is coupled to each of the narrowband reflective optical filter devices (208).