Nortel Networks Corporation

Northern Telecom Limited

Stone H Tseng

Kalyan K Basu

Sheng-Chou Lin

Nikhil Jain

Jerry Louis Mizell

Stephen Bennett Elliott

Mini Vasudevan

Sairam Subramanian

Chang Yu

Andrew Sendonaris

Mohamed A Landolsi

Venugopal Veeravalli

Yixin Zhu

Seshu R Madhavapeddy

Dave Lauson

Khaled Elsayed

An asynchronous transfer mode infrastructure is integrated with the communications network. The asynchronous transfer mode infrastructure is composed of an asynchronous transfer mode fabric and asynchronous transfer mode gateway. Wireless and wireline data are linked to the communications network via the asynchronous transfer mode infrastructure, such that all wireless and wireline data transactions within the communications network are processed independently of any switching devices present within the communications network. Wireless and wireline data is transmitted to and from the communications network via a network access function that allows wireless and wireline data to flow to and from the communications network. The wireless and wireline data is converted within the network access function in response to transmittal of the wireless and wireline data to the network access function. The wireless and wireline data is then transferred to the asynchronous transfer mode infrastructure from the network access function.

Method and system for providing an integrated functional topology for wireless and wireline communication networks

Provided herein is a computer-implemented method for generating an optimized cellular-network cell-site plan for an area. A plurality of cellular-traffic demand nodes distributed across the area is provided. Each cellular-traffic demand node of the plurality of cellular-traffic demand nodes has an associated weighting characteristics set. The plurality of nodes are consolidated into a plurality of centroids. Each centroid represents a number of nodes that come within a traffic threshold. A potential cell site is positioned on each of the centroids. Each potential cell site has an associated base-transmitter-station parameter characteristics set. The demand node coverage of each potential cell site is determined with respect to a signal strength of the potential cell site. From the plurality of potential cell sites a minimized cell-site subset is selected while maintaining sufficient cellular service coverage of the plurality of demand nodes.

Method for optimizing cell-site placement

A method for optimizing spectral re-use between an interferer digital phase modulated cellular system and a desirable analog phase modulated cellular system is disclosed wherein an optimal guard band to use with adjacent channel interference is determined, or an optimal guard zone to use with co-channel interference is determined. This is achieved by determining the effect of interference due to a digital phase modulated signal at the baseband of a desired analog phase modulated signal. By the use of this invention, the capacity of a desired system and/or the quality of a service provided by a desired system may be enhanced.

Method for optimizing spectral re-use

A wireless access architecture, having redistributed wireless access functions, comprises a plurality of cell sites connected to a main switching point. The cell sites communicate with cellular users within their respective cell site areas and comprise a communication segment for exchanging communication signals with the cellular users. The main switching point controls the communication with the cellular users and the communication segment and includes a processing segment for processing the communication signals from the cell sites. The processing segment includes a segment for modulating and demodulating the communication signals, and a segment for bit stream processing the communication signals.

Wireless architecture having redistributed access functions

A wireless network, having a plurality of mobile units operating in a cell of the wireless network, isolates a faulty mobile unit that jams the control channel thereby preventing communication by the other mobile units in the cell. A system and method for isolating the faulty mobile unit monitors the cell traffic pattern among the mobile units in the cell to detect an abnormality, determines whether the abnormality is due to the faulty mobile unit or a problem with the wireless network, and if the abnormality is due to the faulty mobile unit, communicates with the mobile units operating within the cell to isolate the faulty mobile unit.

System and method for faulty mobile unit isolation

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Plano, TX, United States of America

Stone H Tseng