Polling-type digital communications system having pseudo-balance

Details Polling-type digital communications system having pseudo-balance Polling-type digital communications system having pseudo-balance

1992-09-24

1995-11-21

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 858, 37082508, H04J 316

Patent

active

054694361

ABSTRACT:
A large communications network is linked to a primary terminal and a secondary terminal. The primary polls the secondary whenever it has data to send, and need not poll at any maximum fixed interval. The poll operation sends a sequence of data frames to the secondary, and causes the secondary to return to the primary a sequence of frames containing any data it may have ready. The secondary can only send data to the primary in response to a poll operation; however, the secondary has the capability of sending a uniquely identifiable frame on its own initiative whenever it has data ready to send and has not received a poll. This frame causes the primary to initiate a normal poll even though it has no data ready to send.

REFERENCES:
patent: 4924461 (1990-05-01), Amemiya et al.
patent: 5010329 (1991-04-01), Nagakura et al.
patent: 5132680 (1992-07-01), Tezuka et al.
patent: 5166675 (1992-11-01), Amemiya et al.
patent: 5170394 (1992-12-01), Biber et al.

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