Multiplex communications – Wide area network – Packet switching
Patent
1988-12-29
1991-01-01
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 943, H04J 314, H04J 326
Patent
active
049824007
ABSTRACT:
A ring hub in a local area network. A parallel ring bus (20, 22, 24, 26) connects a plurality of ring controllers (10, 12, 14, 16) in a closed loop. At reset time one controller (12) is selected to act as a ring monitor and is not connected to a network node. Each one of the remaining controllers are connected to a single node, so that one controller is linked to a corresponding node. The ring monitor and the ring controllers communicate by inserting message packets onto the bus and stripping messages and control information off of the bus. A transfer request packet is used by a source controller (10) to signal a destination controller (14) for permission to send a data packet. A packet acknowledge signal is generated at the destination controller (14) by asserting one of the bus control lines. The packet acknowledge signal is used to signal to the source controller that the transfer request packet has been received and placed in a request queue (40) at the destination controller. A send data reply packet is used by the destination controller to signal the source controller that the queued request can now be serviced. Data packets are inserted on the ring bus by the source controller to send the actual data message.
REFERENCES:
patent: 4383314 (1983-05-01), Tam
patent: 4554659 (1985-11-01), Blood et al.
patent: 4569041 (1986-02-01), Takeuchi et al.
patent: 4675671 (1987-06-01), Ishizuka et al.
patent: 4700185 (1987-10-01), Balph et al.
patent: 4752924 (1988-06-01), Darnell et al.
patent: 4769813 (1988-09-01), Lenart
patent: 4805168 (1989-02-01), Kato
patent: 4809267 (1989-02-01), Higuchi et al.
Intel Corporation
Jung Min
Lamb Owen L.
Olms Douglas W.
LandOfFree
Ring bus hub for a star local area network does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ring bus hub for a star local area network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ring bus hub for a star local area network will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2002317