Multiplex communications – Wide area network – Packet switching
Patent
1989-07-03
1990-09-04
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
375 8, H04J 100
Patent
active
049550217
ABSTRACT:
This invention is a Local Area Network (LAN) which comprises a plurality of NIU's, each arranged to transmit on a separate set of frequencies and to receive on a separate set of frequencies. During operation, a data packet is multihopped from a source NIU, through intermediate NIUs, until reaching an NIU which can transmit a frequency which the destination NIU is capable of receiving. The packet is then forwarded to the destination NIU. The source NIU may also send a control packet and cause the destination NIU to adjust its receive frequency so that subsequent packets may be transmitted directly to the receiving NIU. In an alternative embodiment, the multihopping may be accomplished using specialized headnode modems.
REFERENCES:
patent: 4365331 (1982-12-01), Biba et al.
patent: 4434463 (1984-02-01), Quinquis et al.
patent: 4646295 (1987-02-01), Basile
patent: 4736465 (1988-04-01), Bobey et al.
National Computer Conference, 1987, "The Sub-LAN Solution to Office Connectivity Needs", C. Peterson, pp. 433-436.
AT&T Technical Journal, Nov./Dec. 1987, vol. 66, Issue 6, "Terabit Lightwave Networks: The Multihop Approach", A. S. Acampora et al., pp. 21-34.
AT&T Bell Laboratories
Edwards Christopher O.
Olms Douglas W.
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