H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
H04Q 7/24 (2006.01) H04J 4/00 (2006.01) H04L 12/56 (2006.01) H04L 27/00 (2006.01)
Patent
CA 2242857
A system and method for combining multiplexing and modulation schemes to deliver high and low bandwidth services over a wireless link. The system includes a base station (BTS) with a transmitter for point to multipoint communications to a plurality of network interface units (NIUs) located at customer locations within a geographic area serviced by the base station. In addition to receiving downstream communication from the BTS, each NIU is equipped to communicate in a point to point manner with the BTS. According to the invention time division multiple access multiplexing (TDMA) and quadrature phase shift key (QPSK) modulation is employed for low bandwidth services and frequency division multiplexing (FDM) and quadrature amplitude modulation (QAM) is used to supply high bandwidth services.
Alcatel Canada Inc.
Marks & Clerk
Newbridge Networks Corporation
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