Multiplex communications – Wide area network – Packet switching
Patent
1990-02-05
1991-04-09
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 60, 370 16, H04J 324
Patent
active
050070452
ABSTRACT:
In an integrated communications system, HDLC variable-length packets and non-HDLC fixed-length packets are decomposed into cells and a cell identifier is generated for each of the cells for identifying its type. A frame sync code is transmitted from one end of a transmission channel, and the cell identifier and each of the cells are assembled into a field and a plurality of such fields are assembled into a frame for transmission. The frame sync code is detected at the other end of the transmission channel as a timing reference and the frame is deassembled into fields in response to the timing reference and each field is deassembled into a cell identifier and a cell. According to each deassembled cell identifier, the cells of each field are composed into the original HDLC variable-length packet of non-HDLC fixed-length packet.
REFERENCES:
patent: 4410889 (1983-10-01), Bryant et al.
patent: 4412326 (1983-10-01), Limb
patent: 4872160 (1989-10-01), Hemmady et al.
patent: 4885744 (1989-12-01), Lespagnol et al.
patent: 4922486 (1990-05-01), Lidinsky et al.
patent: 4926420 (1990-05-01), Shimizu
NEC Corporation
Olms Douglas W.
Ton Dang
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