At&t Mobility II LLC

Bellsouth Intellectual Property Corporation

At&t Intellectual Property I, LP

Cingular Wireless Ii, LLC

At&t Bls Intellectual Property, Inc

Ali Jabbary

Ming-Ju Ho

Mark D Austin

Derek Johnson

Stalin Fernando Albanes

Ramzi Barghouthi

Dock J Latiolais

Rudy Hermond

Stephen Adrian Rocha

Claudio Batista Silva

Characterization and enhancement of a mobile local scattering environment. The system includes a channel component and a link control component, wherein the channel component facilitates communication of a ping signal, which is used to estimate the delay spread characteristics and/or angle of arrival in order to characterize the mobile local scattering environment. This information is sent to the link control component, which enhances radio link performance based on the received information. The system can be used to assist in E-911 location applications, such as determining the location of an indoor user.

Estimating mobile local propagation environment characteristics for wireless communications

A method and apparatus for transmitting beacon signals in a wireless communications network. For a given cell site, a single frequency may be used for the beacon signal by assigning different beacon signal time slots to different sectors of the cell site. During one time slot, the beacon signal is transmitted to one of the sectors, and during another one of the time slots, the beacon signal is transmitted to a different one of the sectors. Because a single frequency can be used for all of the sectors of a cell site, more frequencies are available for other purposes, such as for user traffic, for example. The invention improves spectral efficiency, reduces adjacent channel interference and co-channel interference and allows power consumption to be controlled.

Method and apparatus for allocating a beacon signal in a wireless communications network

Method and apparatus for allocating a beacon signal in a wireless communication network

A method of measuring frequency interference between adjacent cell sites in a wireless telecommunications system. The method includes selecting a frequency in a cell site to be used as a beacon frequency. The method also includes activating the beacon frequency in the cell site and recording, at a telecommunications switch, a signal strength of the beacon frequency as measured by a first wireless device operating in the cell site and a signal strength of the beacon frequency as measured by a second wireless device operating in another cell site. The method further includes determining the frequency interference between the cell site and the other cell site based on the signal strengths.

Wireless frequency re-use determination systems and methods

A method and apparatus for simulating a modification to or expansion of a communications network and for determining whether the simulated modified or expanded network meets cost criteria. First logic forecasts an increase in network traffic. Second logic simulates a modification to or expansion of the network based on the forecasted increase in network traffic and/or based on performance improvement criteria and/or based on coverage expansion criteria. Third logic determines whether the simulated modified or expanded network meets cost criteria.

Method and apparatus for automatically determining the manner in which to allocate available capital to achieve a desired level of network quality performance

The present invention relates to systems for determining mobile communications system carrier propagation characteristics. In an embodiment, a system includes a frequency scanner, signal strength measurement device, digital verification color code logic, a location determining unit, and a memory. The frequency scanner can output a carrier signal corresponding to a carrier signal identifier, where the frequency scanner is located at a geographical location. The signal strength measurement device can be coupled to the frequency scanner and determine a carrier strength indicator of the carrier signal. The digital verification color code logic can be coupled to the frequency scanner and determine the digital verification color code of the carrier signal. The location determining unit can be coupled to the frequency scanner and determine a location identifier corresponding to the geographical location of the frequency scanner. The memory can be coupled to the frequency scanner and store the carrier signal identifier, the carrier strength indicator, the digital verification color code of the carrier signal, and the location identifier.

System and method for determining mobile communication system carrier frequency propagation characteristics

A system and method for generating a switch-based C/I matrix for a wireless network is provided. A cell-under-test (CUT) may broadcast system unique carrier and interference signals to mobile stations serviced by the CUT and mobile stations serviced by measurement sectors of other cells in the wireless network. The mobile stations make downlink signal strength measurements, and transmit the signal strength measurements to the corresponding sectors and CUT that service the mobile stations. The measurement sectors may be further configured to measure signal strength of the interference signals transmitted from the CUT on the uplink. The signal strengths are then processed to generate the switch-based C/I matrix.

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Roswell, GA, United States of America

Ali Jabbary