Scoreboard, Inc.

Andrew Corporation

Stanley J Gutowski

John Arpee

A data collection and evaluation method for determination of wireless signal propagation from an incomplete set of measured data and for modeling the system as a set of RF point sources located at the tower in each cell. RF propagation measurements are collected according to the present invention, by moving through the wireless system while collecting signal strength data at a large number of locations throughout the wireless system. Signals are received from multiple antennae at each collection location. The present invention develops a non-directional RF propagation model based upon the signals received from each antenna at a particular cell site, the antenna directionality due to the design of the antenna and the orientation of the collection location and the cellular site. The digital identification information on the channel is decoded and used to associate the measurement with an individual originating wireless antenna and/or sector. The decoding process is limited by interference and low signal levels, therefore, the resulting data will have locations or entire areas where digital identification codes cannot be determined and the signal origination antenna cannot be identified. The RF propagation data is then analyzed to remove directionality of the individual antennae and to determine the absolute value of the path loss between the tower as an RF point source and a specific geographic location.

Modeling of RF point source reference for analysis of wireless signal propagation

A process which determines all locations in a service area which are subject to interference-causing limitations, assigns an average service level to each such location, sums the service levels at all such locations, and divides the sum of the service levels at all such locations by the total service level for the service area to produce an interference value.

Method of quantifying the quality of service in a CDMA cellular telephone system

A computer implemented process which utilizes actual received signal level data gathered from closely spaced locations covering an entire CDMA system to calculate interference levels at each location, determines those base stations which most probably communicate with a mobile unit at each particular location, compiles a list of neighbor base stations for each base station at each location throughout the system, and determines the transmit power necessary for each base station to communicate with a mobile unit at each location, calculates interference levels at each base station, and determines the transmit power necessary for a mobile unit at each location to communicate with each base station which most probably communicates with a mobile unit at that particular location.

Method of modeling a CDMA cellular telephone system

A computer implemented process which determines those base stations which most probably communicate with a mobile unit, determines a probability for each base station to communicate with a mobile unit at a location based on the actual received signal level compared to the interference level of signals received at the location, then computes for each set of base stations a probability of that set of base stations communicating.

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Arlington, VA, United States of America

Stanley J Gutowski