Multiplex communications – Wide area network – Packet switching
Patent
1986-12-15
1988-12-20
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 86, H04J 302
Patent
active
047929448
ABSTRACT:
A communication system in which a plurality of terminal devices connected to a loop transmission line perform data transmission/reception in a time-division multiplexing manner by using a communication frame circulating the transmission line. The communication frame being constituted by a plurality of sub-frames, each including a plurality of time slots. Each of the terminal devices is arranged to perform data transmission/reception using a designated time slot in a designated sub-frame. All the sub-frames in the communication frame are allotted to a terminal device of a high capability of data transmission, while less than all of the sub-frames are allotted to a terminal device of a low capability of data transmission. A plurality of low speed terminal devices, to which sub-frames different from each other have been respectively allotted, commonly use a time slot of the same number, so that each of the time slots in the communication frame can be effectively utilized.
REFERENCES:
patent: 3921137 (1975-11-01), McClearn, Jr. et al.
patent: 4413338 (1983-11-01), Renoulin et al.
patent: 4566099 (1986-01-01), Magerl
Hiyama Kunio
Takahashi Yasuhiro
Hitachi , Ltd.
Olms Douglas W.
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