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Polaris Says Trials of Location Based Service Outperformed A-GPS
Polaris Wireless says that trials of its Location Signatures Hybrid technology has outperformed A-GPS alone in both indoor and complex environments, such as dense urban areas with high rise buildings and many signal obstructions.
"The advantage of the Polaris Wireless solution is that it works well in non line-of-sight, cluttered environments - with indoors being a particularly challenging environment for cellular location systems," said Dr. Marty Feuerstein, CTO of Polaris Wireless. "WLS capitalizes on complex obstructions and shadowing to improve location performance."
North American carriers have recently conducted 3G location system trials, testing indoor and outdoor wireless location performance over an urban trial area of 10 square kilometers. Polaris out performed other solutions with a consistent accuracy of 47 to 59 meters versus 230 to 250 meters at 67th percentile. As further confirmation, a major wireless service provider in Asia recently tested location performance, including accuracy, time to fix and battery consumption in urban and suburban settings. Results demonstrated Polaris Hybrid solution performance of 50 to 60 meters in 5 seconds time to fix compared with alternatives at 130 to 140 meters with 20 to 30 seconds time to fix. In addition, significant improvements in battery consumption were demonstrated to support pervasive location applications requiring frequent fixes, such as zone-based mobile marketing services.
Like a fingerprint's pattern of lines and swirls, a location can be identified by a unique set of values including measurements of neighboring cell signal strengths, time delays and other network parameters. The Polaris WLSTM solution collects this information and uses it to match incoming signals to an extensive georeferenced database of values to determine highly accurate handset location-regardless of the type of environment. In fact, the company said that shadowing from large buildings, walls and other clutter enriches the location signature and increases accuracy.
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