Memory management system and method for network controller

Details Memory management system and method for network controller Memory management system and method for network controller

1990-05-29

1992-08-04

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

3642281, 3642479, H04L 302

Patent

active

051365820

ABSTRACT:
Transmit and receive data are stored in buffer regions defined in first and second memories of a system residing on a network. The buffer regions are pointed to by multiple descriptor rings that are also stored in the memories. In accordance with one aspect of the invention, the two memories reside on separate buses connected to a common bus containing a processor. The processor communicates with one or the other of the memories using a handshaking protocol. In accordance with another aspect of the invention, receive data incoming to the systems is scattered among multiple descriptor rings. A further aspect splits a frame among multiple descriptors depending on a characteristic code carried by the frame, e.g., in a frame control field. The size of the first descriptor, smaller than that of the others, is programmed to correspond to the size of the header of each frame. Synchronization between headers and data of a frame is maintained by a frame number stored in each descriptor. Another aspect prevents blocking of the receive path upon occurrence of a blocked receive descriptor ring. One application of the invention is in a fiber distributed data interface (FDDI).

REFERENCES:
patent: 4491915 (1985-01-01), Forquer et al.
patent: 5043981 (1991-08-01), Firoozmand et al.

Affiliated with

Also associated with

Rating

Memory management system and method for network controller does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Memory management system and method for network controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Memory management system and method for network controller will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-784801