Network controller with memory request and acknowledgement signa

Details Network controller with memory request and acknowledgement signa Network controller with memory request and acknowledgement signa

1992-05-15

1996-01-30

Kim, Ken S.

Boots, shoes, and leggings

395250, 39520008, 395427, 395726, 364DIG1, 3642423, G06F 1316

Patent

active

054887240

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 busses connected to a common buss 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 system 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: 4481578 (1984-11-01), Hughes et al.
patent: 4729090 (1988-03-01), Baba
patent: 4760521 (1988-07-01), Rehwald et al.
patent: 4945473 (1990-07-01), Holtey et al.
patent: 5007051 (1991-04-01), Dolkas et al.
Hemant Kanakia, et al., "The VMP Network Adapter Board (NAB): High -Performance Network Communication for Multiprocessors", vol. 18, No. 4, Aug. 1988, pp. 175-187.
Kenzo Ohno, et al., "Optical High Speed (100Mbps) Token Ring System", IEEE, vol. 2, Dec. 1988, pp. 0645-0652.

Affiliated with

Also associated with

Rating

Network controller with memory request and acknowledgement signa does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Network controller with memory request and acknowledgement signa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Network controller with memory request and acknowledgement signa will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-162903