Galen H Sasaki

Author:

Galen Sasaki

ISBN #:

0123740924

US Patent:

6970433, Nov 29, 2005

Filed:

Jul 21, 1999

Appl. No.:

09/362635

Inventors:

Rajiv Ramaswami - Ossining NY, US
Galen Sasaki - Honolulu HI, US

Assignee:

Tellabs Operations, Inc. - Naperville IL

International Classification:

H04J003/02
H04J014/00

US Classification:

370255, 370407, 370425, 398 50, 398 56, 709252

Abstract:

A star communication network including a hub node () and links (E) couple to the hub node for carrying data along routes in W channels. The hub node has switches connecting each channel of a first one of the links to various channels of a second one of the links through the hub node.

US Patent:

7606180, Oct 20, 2009

Filed:

May 16, 2005

Appl. No.:

11/131056

Inventors:

Rajiv Ramaswami - Ossining NY, US
Galen Sasaki - Honolulu HI, US

Assignee:

Tellabs Operations, Inc. - Naperville IL

International Classification:

H04L 12/42
H04J 14/00
G06F 15/16

US Classification:

370258, 370403, 370424, 398 50, 398 56, 398 59, 709251

Abstract:

A ring communication network according to an embodiment of the present invention includes a plurality of nodes in which a single one of the nodes is configured for full channel conversion and the remaining nodes, other than the single node, are configured for no channel conversion. Links with no more than W channels couple the nodes. The ring communication network may include N nodes and links connecting the nodes for carrying data in W channels such that N≧2 logW−1, where W is a power of 2. Each of the N nodes includes switches connected such that each channel of a first one of the links adjacent to any one of the N nodes can be switched to no more than W−1 channels of another one of the links adjacent to any one node.

US Patent:

8134939, Mar 13, 2012

Filed:

Sep 9, 2009

Appl. No.:

12/556125

Inventors:

Rajiv Ramaswami - Ossining NY, US
Galen H. Sasaki - Honolulu HI, US

Assignee:

Tellabs Operations, Inc. - Naperville IL

International Classification:

H04J 3/02
H04J 14/00
H04L 12/42
H04L 12/44
G06F 15/16

US Classification:

370255, 370258, 370403, 370407, 370424, 370425, 398 50, 398 56, 398 59, 709251, 709252

Abstract:

A ring communication network according to an embodiment of the present invention includes a plurality of nodes in which a single one of the nodes is configured for full channel conversion and the remaining nodes, other than the single node, are configured for no channel conversion. Links with no more than W channels couple the nodes. The ring communication network also may include N nodes and links connecting the nodes for carrying data in W channels such that N≧2 logW−1 where W is a power of 2. Each of the N nodes includes switches connected such that each channel of a first one of the links adjacent to any one of the N nodes can be switched to no more than W−1 channels of another one of the links adjacent any one node.

US Patent:

20010043563, Nov 22, 2001

Filed:

May 4, 2001

Appl. No.:

09/849144

Inventors:

Ornan Gerstel - Riverdale NY, US
William Hall - Clinton CT, US
Rajiv Ramaswami - Ossining NY, US
Galen Sasaki - Honolulu HI, US

International Classification:

G01R031/08

US Classification:

370/228000, 370/216000, 714/001000

Abstract:

Efficient methods for rerouting failed channels on to spare channels in a multichannel transmission system are described. One method uses a minimal amount of rerouting to reroute all the channels if one or two line cards fail. Another set of methods reroute up to two failed channels on to spare channels in the event of channel failures. With this method only the failed channels are rerouted. However the failed channels may have to be routed through a slightly larger, but minimal, number of additional hops than with the first method.

US Patent:

57295271, Mar 17, 1998

Filed:

Mar 19, 1996

Appl. No.:

8/618652

Inventors:

Ornan Alexander Gerstel - Riverdale NY
William Eric Hall - Clinton CT
Rajiv Ramaswami - Ossining NY
Galen Hajime Sasaki - Honolulu HI

Assignee:

Tellabs Operations, Inc. - Lisle IL

International Classification:

H04L 1250

US Classification:

370228

Abstract:

Efficient methods for rerouting failed channels on to spare channels in a multichannel transmission system are described. One method uses a minimal amount of rerouting to reroute all the channels if one or two line cards fail. Another set of methods reroute up to two failed channels on to spare channels in the event of channel failures. With this method only the failed channels are rerouted. However the failed channels may have to be routed through a slightly larger, but minimal, number of additional hops than with the first method.

US Patent:

62562932, Jul 3, 2001

Filed:

Mar 16, 1998

Appl. No.:

9/039665

Inventors:

Ornan Alexander Gerstel - Riverdale NY
William Eric Hall - Clinton CT
Rajiv Ramaswami - Ossining NY
Galen Hajime Sasaki - Honolulu HI

Assignee:

Tellabs Operations, Inc. - Lisle IL

International Classification:

G01R 3108

US Classification:

370228

Abstract:

Efficient methods for rerouting failed channels on to spare channels in a multichannel transmission system are described. One method uses a minimal amount of rerouting to reroute all the channels if one or two line cards fail. Another set of methods reroute up to two failed channels on to spare channels in the event of channel failures. With this method only the failed channels are rerouted. However the failed channels may have to be routed through a slightly larger, but minimal, number of additional hops than with the first method.

US Patent:

61083119, Aug 22, 2000

Filed:

Apr 29, 1996

Appl. No.:

8/641061

Inventors:

Rajiv Ramaswami - Ossining NY
Galen Sasaki - Honolulu HI

Assignee:

Tellabs Operations, Inc. - Lisle IL

International Classification:

H04J 302
H04J 1400

US Classification:

370258

Abstract:

A ring communication network including N nodes and comprising links between the nodes for carrying data in W channels. The network is configured by providing nodes and channels such that N. gtoreq. 2 log. sub. 2 W-1 where W is a power of 2. No more than W channels are assigned to the transmission of data along any of the links. The nodes are configured such that each channel of a first one of the links adjacent any one of the nodes can be switched to no more than W-1 channels of a second one of the links adjacent any one node.