ore specifica- tion and continues to develop, building on its inherent strengths-small-form- factor radio, low power, low cost, built-in security, robustness, ease-of-use, and ad hoc networking abilities. Alas, some North American carriers view Bluetooth as a competitive threat. In an attempt to maximize income, these carriers disable file transfer functionality on the Bluetooth-enabled phones they sell, thus requiring users to incur airtime charges associated with e-mailing files to their computers. The Bluetooth SIG has identified several key markets for Bluetooth technology, including automotive, consumer, core technology, computing, and telephony. In addition, Bluetooth wireless technology is beginning to play a major role in wire- less seismology and telemetry, adding high-data-rate wireless capability to a sensor market that is estimated at some 1 trillion sensors currently deployed. The growing new generation of wireless sensors will take on many roles, including functions such as monitoring ice on roadways, measuring structural fatigue on bridges, and monitoring beachfronts for pollution and littering. Recently, in keeping with its namesake, Bluetooth came to very positive terms in working with UWB technology (discussed later in this chapter). Demonstrating the next step in the ongoing evolution of WPAN functionality, in January 2006, Alereon (www.alereon.com) hosted the industry's first public demonstration of Bluetooth+WiMedia UWB operating smoothly together under an existing Blue- tooth software stack. When it comes to large files and multimedia applications, Bluetooth version 2.0 devices operate at data rates that are frustratingly slow. Blue- tooth's maximum data rate of 3Mbps is simply too slow for today's media-centric Chapter 15 WMANs, WLANs, and WPANs applications. Combining Bluetooth with WiMedia UWB brings major improve- ments. The combination of a WiMedia UWB solution from Alereon and Bluetooth software from Open Interface (www.oi-us.com) enables Bluetooth applications that run 500 times the s