公开(公告)号：US20030123881A1

公开(公告)日：2003-07-03

申请号：US10323683

申请日：2002-12-20

Applicant: Nortel Networks Limited

Inventor： David Milton ,  Tomas Valis ,  Gino Totti ,  Kexing Liu ,  Michel Pigeon

IPC: H04J014/02

CPC classification number: H04J14/0291 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/028 ,  H04J14/0282 ,  H04J14/0283 ,  H04J14/0284 ,  H04J14/0289 ,  H04J14/0298 ,  H04Q11/0062

Abstract: A communications network has a plurality of nodes interconnected by an optical transmission medium. The transmission medium is capable of a carrying a plurality of wavelengths organized into bands. A filter at each node for drops a band associated therewith and passively forwards other bands through the transmission medium. A device is provided at each node for adding a band to the transmission medium. Communication can be established directly between a pair of nodes in the network sharing a common band without the active intervention of any intervening node. This allows the network to be protocol independent. Also, the low losses incurred by the passive filters permit relatively long path lengths without optical amplification.

公开(公告)号：US20030170027A1

公开(公告)日：2003-09-11

申请号：US10323685

申请日：2002-12-20

Applicant: Nortel Networks Limited

Inventor： David Milton ,  Tomas Valis ,  Gino Totti ,  Kexing Liu ,  Michel Pigeon

IPC: H04J014/02

CPC classification number: H04J14/0291 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/028 ,  H04J14/0282 ,  H04J14/0283 ,  H04J14/0284 ,  H04J14/0289 ,  H04J14/0298 ,  H04Q11/0062

Abstract: A communications network has a plurality of nodes interconnected by an optical transmission medium. The transmission medium is capable of a carrying a plurality of wavelengths organized into bands. A filter at each node for drops a band associated therewith and passively forwards other bands through the transmission medium. A device is provided at each node for adding a band to the transmission medium. Communication can be established directly between a pair of nodes in the network sharing a common band without the active intervention of any intervening node. This allows the network to be protocol independent. Also, the low losses incurred by the passive filters permit relatively long path lengths without optical amplification.

公开(公告)号：US20030215238A1

公开(公告)日：2003-11-20

申请号：US10323680

申请日：2002-12-20

Applicant: Nortel Networks Limited

Inventor： David Milton ,  Tomas Valis ,  Gino Totti ,  Kexing Liu ,  Michel Pigeon

IPC: H04J014/02

CPC classification number: H04J14/0291 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/028 ,  H04J14/0282 ,  H04J14/0283 ,  H04J14/0284 ,  H04J14/0289 ,  H04J14/0298 ,  H04Q11/0062

Abstract: A communications network has a plurality of nodes interconnected by an optical transmission medium. The transmission medium is capable of a carrying a plurality of wavelengths organized into bands. A filter at each node for drops a band associated therewith and passively forwards other bands through the transmission medium. A device is provided at each node for adding a band to the transmission medium. Communication can be established directly between a pair of nodes in the network sharing a common band without the active intervention of any intervening node. This allows the network to be protocol independent. Also, the low losses incurred by the passive filters permit relatively long path lengths without optical amplification.

公开(公告)号：US20030170029A1

公开(公告)日：2003-09-11

申请号：US10323681

申请日：2002-12-20

Applicant: Nortel Networks Limited

Inventor： David Milton ,  Tomas Valis ,  Gino Totti ,  Kexing Liu ,  Michel Pigeon

IPC: H04J014/02

CPC classification number: H04J14/0291 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/028 ,  H04J14/0282 ,  H04J14/0283 ,  H04J14/0284 ,  H04J14/0289 ,  H04J14/0298 ,  H04Q11/0062

Abstract: A communications network has a plurality of nodes interconnected by an optical transmission medium. The transmission medium is capable of a carrying a plurality of wavelengths organized into bands. A filter at each node for drops a band associated therewith and passively forwards other bands through the transmission medium. A device is provided at each node for adding a band to the transmission medium. Communication can be established directly between a pair of nodes in the network sharing a common band without the active intervention of any intervening node. This allows the network to be protocol independent. Also, the low losses incurred by the passive filters permit relatively long path lengths without optical amplification.

公开(公告)号：US20030170026A1

公开(公告)日：2003-09-11

申请号：US10323679

申请日：2002-12-20

Applicant: Nortel Networks Limited

Inventor： David Milton ,  Tomas Valis ,  Gino Totti ,  Kexing Liu ,  Michel Pigeon

IPC: H04J014/02

CPC classification number: H04J14/0291 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/028 ,  H04J14/0282 ,  H04J14/0283 ,  H04J14/0284 ,  H04J14/0289 ,  H04J14/0298 ,  H04Q11/0062

Abstract: A communications network has a plurality of nodes interconnected by an optical transmission medium. The transmission medium is capable of a carrying a plurality of wavelengths organized into bands. A filter at each node for drops a band associated therewith and passively forwards other bands through the transmission medium. A device is provided at each node for adding a band to the transmission medium. Communication can be established directly between a pair of nodes in the network sharing a common band without the active intervention of any intervening node. This allows the network to be protocol independent. Also, the low losses incurred by the passive filters permit relatively long path lengths without optical amplification.

公开(公告)号：US20030161635A1

公开(公告)日：2003-08-28

申请号：US10323682

申请日：2002-12-20

Applicant: Nortel Networks Limited

Inventor： David Milton ,  Tomas Valis ,  Gino Totti ,  Kexing Liu ,  Michel Pigeon

IPC: H04J014/02 ,  H04B010/08

CPC classification number: H04J14/0291 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/028 ,  H04J14/0282 ,  H04J14/0283 ,  H04J14/0284 ,  H04J14/0289 ,  H04J14/0298 ,  H04Q11/0062

Abstract: A communications network has a plurality of nodes interconnected by an optical transmission medium. The transmission medium is capable of a carrying a plurality of wavelengths organized into bands. A filter at each node for drops a band associated therewith and passively forwards other bands through the transmission medium. A device is provided at each node for adding a band to the transmission medium. Communication can be established directly between a pair of nodes in the network sharing a common band without the active intervention of any intervening node. This allows the network to be protocol independent. Also, the low losses incurred by the passive filters permit relatively long path lengths without optical amplification.