| Bluetooth is a system for providing wireless mode of carrying electronic products linking with each other,it is one kind of wireless connection of really low cost,low power. It is small and portable,perfecting the existing different device mode and providing excellent service for mobile and business users.After describing and analyzing the framework of bluetooth system,this paper emphasized on comparing bluetooth with IEEE802.il and HomeRF,pointed out a good future of bluetooth;the technology of bluetooth wireless access system is fresh and reserved. This paper analyzed where the shoe pinches of bluetooth data translation based on its frequency selection,fraction translating and piconet communication.Service Discovery Protocol (SDP) is one core protocol of bluetooth protocol stack,an important part of bluetooth system and the base of all user mode. In bluetooth system clients can inquire device information,service and its attribute. It will establish radio link among several bluetooth devices.After analyzing the essential principle and data-translating course of SDP,this paper achieved the DEMO model of SDP client/server pattern. At last a suggestion about SDP was put forward-adopting Jini and Upnp for bluetooth system. It may be useful to research and development of the future bluetooth system.
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