peed of regular Bluetooth and use less than 2% of the bat- tery energy of Bluetooth. Consumers can use this type of solution to share images, phone books, videos, and other Bluetooth content at up to 480Mbps, allowing devices such as megapixel camera phones to download in seconds, rather than minutes. IEEE 802.15.3 (WPAN-HR and WPAN-AHR) The IEEE 802.15.3 (WPAN-HR) Task Group for WPANs was chartered to draft and publish a standard for high-rate (20Mbps or greater) WPANs. Besides a high data rate, the new standard provides for low-power, low-cost solutions that address the needs of portable consumer digital imaging and multimedia applications. IEEE 803.15.3 defines the PHY and MAC specifications for high-data-rate wireless con- nectivity with fixed, portable, and moving devices within or entering a personal operating space. One goal of the WPAN-HR Task Group is to achieve a level of interoperability or coexistence with other 802.15 task groups. The IEEE 802.15.3 standard has been developed to meet the demanding requirements of portable consumer imaging and multimedia applications, offering QoS to address such environments. It is based on a centralized and connection- oriented ad hoc peer-to-peer networking topology. IEEE 802.15.3 is optimized for low-cost, small-form-factor, and low-power consumer devices, enabling multime- dia applications that are not optimized by existing wireless standards. The current technology operates in the unlicensed .4GHz band and supports five selectable data rates-11Mbps, 22Mbps, 33Mbps, 44Mbps, and 55Mbps-and three to four nonoverlapping channels. The range is 3 to 150 feet (1 to 50 m), with most usage anticipated in the 15- to 60-foot (5- to 20-m) range. The standard is also secure because it implements privacy, data integrity, mutual-entity authentica- tion, and data-origin authentication for consumer applications. The IEEE 802.15.3a (WPAN-AHR) Task Group is working to define a project to provide a higher-speed PHY enhancement to 802.15.3, addressing imaging and multimedia applicat