Multiplex communications – Channel assignment techniques – Polling
Patent
1996-10-08
1998-05-12
Hsu, Alpus H.
Multiplex communications
Channel assignment techniques
Polling
370460, 34082505, H04J 312, H04L 12433
Patent
active
057517142
ABSTRACT:
In a token ring network a periodic recirculating frame having a plurality of information carrying slots and a header section is used for enabling a plurality of telephone stations to exchange information carrying signals. The header is provided with a token which can assume one of three states. In the first state FF, a telephone station wanting to make a call, changes the token to the second state 00 and inserts call establishment information in the header. A server station also connected in the ring detects the second state as a request to establish a connection from and to a station specified in the header. The server changes the token to the third state AA and inserts a slot assignment in the header. All stations receiving a frame with a token in the third state examine the header. The calling station implies confirmation of the requested connection and the called station is made aware of the call and the identity of the caller. When this frame returns to the server the token state is set to FF and another station on the ring can request a slot for communication with another station.
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Albano Andre
Chuniaud Rene
Fieschi Jacques
Le Pennec Jean-Francois
Michel Patrick
Cockburn Joscelyn G.
Frisone John B.
Hsu Alpus H.
International Business Machines - Corporation
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