Apparatus and method for guaranteeing isochronous data flow on a

Details Apparatus and method for guaranteeing isochronous data flow on a Apparatus and method for guaranteeing isochronous data flow on a

1997-06-19

1999-09-28

Ton, Dang

Multiplex communications

Channel assignment techniques

Carrier sense multiple access

370443, 370459, H04L 12413

Patent

active

059600012

ABSTRACT:
A contention protocol permitting transmission of isochronous data. A device (104) wishing to transmit isochronous data can reserve periodic time slots for the transmission. Either the device (104) or a network controller (101) transmits the reservation information to other devices (106, 108) on the network. When non-isochronous transmissions are desired, the devices (104, 106, 108) contend for access using the CSMA/CD protocols, but taking into account the already reserved time slots. For example, the reserved period may be added to the randomly chosen backoff window. Alternatively, if a backoff window expires during a reserved period, the backoff window may be restarted upon completion of the reserved period. If not all the devices (104, 106, 108) on the network employ this modified CSMA/CD protocol, a "dummy" frame is provided at the beginning of each isochronous transmission. If another device is contending for access, the dummy frame collides, and the other device backs off. The isochronous transmission then proceeds.

REFERENCES:
patent: 4549292 (1985-10-01), Isaman et al.
patent: 4637014 (1987-01-01), Bell et al.
patent: 4858232 (1989-08-01), Diaz et al.
patent: 5329531 (1994-07-01), Diepstraten et al.
patent: 5406559 (1995-04-01), Edem et al.
patent: 5440556 (1995-08-01), Edem et al.
patent: 5450411 (1995-09-01), Heil
patent: 5521928 (1996-05-01), Worsley et al.
patent: 5570355 (1996-10-01), Dail et al.
patent: 5594732 (1997-01-01), Bell et al.
patent: 5761430 (1998-06-01), Gross et al.
patent: 5805597 (1998-09-01), Edem

Affiliated with

Also associated with

Rating

Apparatus and method for guaranteeing isochronous data flow on a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for guaranteeing isochronous data flow on a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for guaranteeing isochronous data flow on a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-712069