H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/84
H04L 5/14 (2006.01) H04L 12/42 (2006.01) H04L 12/433 (2006.01)
Patent
CA 2034660
A technique for establishing and maintaining full duplex communication between two stations connect- ed to a token ring network, without dedicated connections. In an auto-configuration full duplex mode of operation, each station ascertains whether there are only two active stations on the network and, if so, performs an exchange of frames with the other station to establish full duplex communication. Once established, full duplex communication can proceed at a greater bandwidth than communication in a token ring network, and without latency delays and distance limitations associated with token ring networks. Periodic checks are made by each station in full duplex communication, to ascertain if the other station is still participating or if any third station has become active. In either case, stations in the auto-configuration mode revert to token ring mode auto-matically. In a variant form of the invention, stations can operate in a fixed full duplex mode, in which the detection of tokens or third stations are merely reported and do not necessarily result in reversion to the token ring mode.
Hawe William
Spinney Barry A.
Yang Henry Sho-Che
Digital Equipment Corporation
Smart & Biggar
LandOfFree
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