Alcatel Canada Inc.

Erik H Boch

Bernard Herscovich

Alan Jaakkola

A scaleable, broadband wireless system for providing radio access to a metropolitan area. The metropolitan area is sub-divided into overlapping cellular areas each having a base station for communication with network interface units at customer sites within each cell. ATM Radio Interface Cards (ARICs), both time division multiple access (TDMA) and frequency division multiple access (FDMA), in each base station implement protocols for bi-directionally linking the NIUs with the ATM backbone. FDMA ARICs provide point to point radio access between base stations over intercell links. The capacity of the system can be scaled by adding the appropriate ARICs as required to meet demand.

Cellular base station with integrated multipoint radio access and intercell linking

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.

Combining QAM and QPSK to optimize license capacity in cellular, multipoint wireless access systems

A system and method for increasing the use of frequency licenses in a cellular, multipoint wireless access system with non-mobile customer sites. The cell coverage of a base station is divided into sectors, for example 4, and orthogonal polarization between adjacent sectors is employed. For bi-directional communication uplink and downlink signals within each sector also employs orthogonal polarization.

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Stittsville, Canada

Erik H Boch