Daniel J Smyth

US Patent:

58257489, Oct 20, 1998

Filed:

Apr 8, 1997

Appl. No.:

8/833636

Inventors:

Kathy Sue Barkey - Kingston NY
Carl Alfred Bender - Highland NY
Derrick LeRoy Garmire - Kingston NY
Harold Edgar Roman - Danville NH
Daniel Gerard Smyth - Austin TX

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04L 1256

US Classification:

370236

Abstract:

A credit-based flow control checking scheme is presented for controlling data communications in a closed loop system comprising a sender, a receiver and a link coupling the sender and receiver. The credit-based scheme includes automatically periodically transmitting a credit query from the receiver to the sender and upon return receipt of a credit acknowledge containing the available credit count maintained by the sender, determining whether credit gain or credit loss has occurred subsequent to initialization of the closed loop system. Along with automatically determining whether credit gain or credit loss has occurred, a method/system is presented for automatically correcting the loss or gain without requiring resetting of the closed loop system.

US Patent:

60444061, Mar 28, 2000

Filed:

Apr 8, 1997

Appl. No.:

8/835457

Inventors:

Kathy Sue Barkey - Kingston NY
Carl Alfred Bender - Highland NY
Derrick LeRoy Garmire - Kingston NY
Harold Edgar Roman - Danville NH
Daniel Gerard Smyth - Austin TX

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1338
G06F 1517

US Classification:

709235

Abstract:

A credit-based flow control checking scheme is presented for controlling data communications in a closed loop system comprising a sender, a receiver and a link coupling the sender and receiver. The credit-based scheme includes automatically periodically transmitting a credit query from the receiver to the sender and upon return receipt of a credit acknowledge containing the available credit count maintained by the sender, determining whether credit gain or credit loss has occurred subsequent to initialization of the closed loop system. Along with automatically determining whether credit gain or credit loss has occurred, a method/system is presented for automatically correcting the loss or gain without requiring resetting of the closed loop system.

US Patent:

59681799, Oct 19, 1999

Filed:

Apr 8, 1997

Appl. No.:

8/841977

Inventors:

Kathy Sue Barkey - Kingston NY
Derrick LeRoy Garmire - Kingston NY
Harold Edgar Roman - Danville NH
Daniel Gerard Smyth - Austin TX

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 104

US Classification:

713400

Abstract:

A self-timed link between two elements in a computer system is initialized. Each element sends an initialization request to the other. If successfully received, the elements exchange signals with oscillation-free segments over multiple clock cycles. If successful, the elements indicate to each other that initialization is complete. Optionally, a link operation parameter can be sent with the initialization complete indication for post-initialization link control.

US Patent:

58945709, Apr 13, 1999

Filed:

Apr 8, 1997

Appl. No.:

8/825790

Inventors:

Kathy Sue Barkey - Kingston NY
Derrick LeRoy Garmire - Kingston NY
Harold Edgar Roman - Danville NH
Daniel Gerard Smyth - Austin TX

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 900

US Classification:

395651

Abstract:

A self-timed link between two elements in a computer system is initialized. Each element sends an initialization request to the other. If successfully received, the elements exchange signals with oscillation-free segments over multiple clock cycles. If successful, the elements indicate to each other that initialization is complete. Optionally, a link operation parameter can be sent with the initialization complete indication for post-initialization link control.