Method and apparatus for closed loop, out-of-band...

Details Method and apparatus for closed loop, out-of-band... Method and apparatus for closed loop, out-of-band...

2004-07-27

2008-11-18

Yao, Kwang B. (Department: 2616)

Multiplex communications

Data flow congestion prevention or control

Flow control of data transmission through a network

C370S416000

Reexamination Certificate

active

07453810

ABSTRACT:
A backpressure mechanism uses a TDM backpressure bus with each port card being assigned time slot. During its time slot, each ingress card/port writes on the bus the number of packets it transmitted to an egress ports during the last data refresh cycle. This information is read by the egress ports and used to compute current depth of the switch fabric output queues. In addition to information received from ingress cards, egress cards keep count of number of packets received from the appropriate switch fabric port and based on it estimate/calculate the current depth of the switch fabric output queue. Congestion states are calculated for all queues by comparing the queue depth with a respective threshold. Each egress card uses these congestion states to generate backpressure signals to ingress cards. Ingress card are using these signals to make decision whether to send or not traffic to destination egress card/port.

REFERENCES:
patent: 5475682 (1995-12-01), Choudhury et al.
patent: 5493566 (1996-02-01), Ljungberg et al.
patent: 5689500 (1997-11-01), Chiussi et al.
patent: 5768257 (1998-06-01), Khacherian et al.
patent: 6011779 (2000-01-01), Wills
patent: 6067298 (2000-05-01), Shinohara
patent: 6304554 (2001-10-01), Matsumura et al.
patent: 6771596 (2004-08-01), Angle et al.
patent: 7180862 (2007-02-01), Peebles et al.
patent: 7263066 (2007-08-01), Yun et al.
patent: 2001/0026551 (2001-10-01), Horlin
patent: 2003/0169773 (2003-09-01), Gilsdorf
patent: 2004/0100980 (2004-05-01), Jacobs et al.
patent: 2005/0088969 (2005-04-01), Carlsen et al.

Affiliated with

Also associated with

Rating

Method and apparatus for closed loop, out-of-band... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for closed loop, out-of-band..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for closed loop, out-of-band... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4044775