Ethernet extender

Details Ethernet extender Ethernet extender

1994-04-05

1995-07-25

Chin, Wellington

Multiplex communications

Wide area network

Packet switching

370 8513, 370 941, H04L 1246, H04L 1266

Patent

active

054369029

ABSTRACT:
A telecommunication bridge system uses synchronized arbitration in a portion of a frame of a Radio Frequency (RF) subsystem and is transparent to Ethernet layer protocols and Ethernet-type packets in order to increase bandwidth utilization and effectively extend Ethernet networks to metropolitan-area-wide application. The telecommunication bridge system comprises an enhanced Ethernet network interface subsystem coupled to a conventional Ethernet medium and a control subsystem including an RF modem, in turn coupled to a frame synchronized RF medium in a metropolitan-sized network. On one side the control subsystem emulates all Ethernet layer protocols and on the other side conducts a prioritized arbitration scheme during only a portion of a time division multiplexed frame, the remainder of the frame for carrying a payload of unmodified packets to other bridges. Included in the controller subsystem is a two-way Manchester/NRZ Code converter, its own intelligence and packet buffering using a microprocessor and random access memory.

REFERENCES:
patent: 4675866 (1987-06-01), Takumi et al.
patent: 4897841 (1990-01-01), Gang, Jr.
patent: 4989203 (1991-01-01), Phinney
patent: 5255268 (1993-10-01), Cato et al.

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