Multiplex communications – Communication over free space – Using atm as a wireles protocol
Reexamination Certificate
2005-11-08
2005-11-08
Pham, Chi (Department: 2667)
Multiplex communications
Communication over free space
Using atm as a wireles protocol
C370S312000, C370S395100, C370S485000
Reexamination Certificate
active
06963547
ABSTRACT:
Disclosed a local multipoint distribution system (LMDS) and method of communicating ATM data on the LMDS that establishes a virtual circuit using a head-end unit to allow a bidirectional communication on ATM network and provide a medium access control(MAC) protocol by the head-end unit to perform multiplexing/demultiplexing and routing operations for data to be transmitted or received. The local multipoint distribution system comprising: a central office unit for multiplexing or demultiplexing an inputted data stream; a head-end unit for modulating downstream data of ATM cell structure provided from the central office unit, or demodulating an inputted upstream data and forwarding the central office unit; and a hub outdoor unit for converting the downstream data from the head-end unit with low frequency and transmitting to corresponding user application, or converting the upstream data received from the user application with high frequency and forwarding to the head-end unit, wherein, the central office unit or the head-end unit establish a virtual channel between the central office unit and the head-end unit to enable bidirectional communication in ATM network, and provides MAC protocol and routes a received data to a corresponding destination by multiplexing or demultiplexing the data.
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Choi Kwang Ju
Kim Dong Hyun
Kwak Ok Moon
Park Doo Il
Youm Jee Woon
Fleshner & Kim
LG Electronics Inc.
Ly Anh-Vu
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