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Mobile Platforms and Development Environments by Wendong Li, Sumi Helal, Raja Bose

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CHAPTER 6

Platform-in-Platform: Location-Based Services (LBS)1

6.1 HISTORICAL PERSPECTIVE

The main origin of Location-Based Services (LBS) was the E911 (Enhanced 911) mandate, which the U.S. government passed in 1996. The mandate was for mobile-network operators to locate emergency callers with prescribed accuracy, so that the operators could deliver a caller’s location to Public Safety Answering Points. Cellular technology couldn’t fulfill these accuracy demands back then, so operators started enormous efforts to introduce advanced positioning methods. To gain returns on the E911 investments, operators launched a series of commercial LBSs. In most cases, these consisted of finder services that, on request, delivered to users a list of nearby ...

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