Multiplex communications – Wide area network – Packet switching
Patent
1992-06-24
1993-09-28
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
34082507, 3408255, H04J 314
Patent
active
052491820
ABSTRACT:
A multi-station communication bus system allows for the use of several master stations by way of an arbitration organization. A message contains a master address which is subjected to an arbitration operation, a slave address with space for a slave address acknowledge bit, a control signal with space for a control acknowledge bit, and one or more data bytes. Per data byte an indication of the "last" byte is also transmitted and space is reserved for a data acknowledge bit. When a data acknowledge bit is not correctly received, the data byte in question is repeated until at the most the maximum frame length is reached. The remainder of a message is then placed in a next frame. If an address or control acknowledge bit is not correctly received, the relevant frame is terminated. In case of a plurality of bytes in a message, the first frame thereof has a lock control signal that is activated upon communication of at least one data byte. Moreover, the last byte of the message is put in a separate frame that has an unlock control signal which is activated upon communication of the last byte.
REFERENCES:
patent: 4429384 (1984-01-01), Kaplinsky
patent: 4715031 (1987-12-01), Crawford et al.
patent: 4750176 (1988-06-01), van Veldhuizen
patent: 4779089 (1988-10-01), Theus
patent: 4787033 (1988-11-01), Bomba et al.
patent: 4818985 (1989-04-01), Ikeda
patent: 4937816 (1990-06-01), van Steenbrugge et al.
patent: 5003536 (1991-03-01), Tanaka et al.
patent: 5031175 (1991-07-01), Tanaka et al.
patent: 5128936 (1992-07-01), van Steenbrugge et al.
de Leeuw Henricus F. A.
Van Steenbrugge Bernard
Barschall Anne E.
Marcelo Melvin
Olms Douglas W.
U.S. Philips Corporation
LandOfFree
Communication bus system with lock/unlock capability does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Communication bus system with lock/unlock capability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Communication bus system with lock/unlock capability will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2195704