The Design And Implementation Of Bluetooth Hotspot Profile

Bluetooth is a short-range, low-power wireless technology which is mainly used for wireless connection in short distance among portable devices. Because of the advantages of low power consumption and low cost, Bluetooth is widely used in production and daily life. Bluetooth SIG issued a global Bluetooth application protocol profile based on which many Bluetooth application frameworks was developed to meet the needs of various applications. The headset profile and the object exchange profile are more widely used, the headset profile is used to transfer voice stream between the mobile phone and earphone, and the object exchange profile is used to transfer file between the mobile phone and PC.This paper is to design and implement the new Bluetooth profile which will satisfy the needs of the information interactive. According to the possible applications and application methods of the Bluetooth profile, the service mode of the Bluetooth profile will be divided into three modes: the active mode, passive mode and transit mode, and the workflow of the Bluetooth profile was presented as well. As the client in the Bluetooth profile is mainly the mobile phone or PDA and other mobile terminals that have limited data processing capacity, the paper also provides the data format communicated between servers and client. The data format is not to transmitted in file format in order to reduce the data load transmitted through Bluetooth as well as the amount of data processed in the mobile phone. The application framework of Bluetooth must be based on the underlying protocol stack, but there hasn't been Bluetooth protocol stack directly used for the upper development in Windows platform, so this paper also realized some functionalities of the protocol of HCI, L2CAP, SDP and RFCOMM which are the bottom protocols of the Bluetooth protocol stack to meet the demand of the Bluetooth framework. At the same time this paper also implemented the client software in the phone in J2ME platform to achieve the information interactive between the phone and Bluetooth server in PC.