Bluetooth Kernel Protocol Analyzation And Implement

Bluetooth is put out jointly by Ericsson, IBM, Intel, Nokia and Toshiba companies on 1998, it is an advanced wireless network technology, it is an open global protocol of wireless data and audio communication. Based on the low cost connection by wireless, it provides special connections between fixed and mobile equipment communication envirments. All kinds of data and voice bluetooth equipments use microwave to replace the traditional network, intricated cable, and realize data and voice communication very fast, flexible, safe, low cost, low consumption. Currently thousands of engineers devote themselves to the research of Bluetooth.Based on the foundation that accurate comprehension to the protocol and sufficient analyzation, this paper introduce the main characteristic and application of bluetooth technology, discuss the integral framework of bluetooth standard and special content of bluetooth protocol stack, introduct related technology characteristic, network structure. Analyze the contact between each bluetooth protocol layer, and provide the operating theory of bluetooth protocol system.This paper give detailed introduce on bluetooth standard, include Link Manager Protocol (LMP) and Logical Link Control and Adaptation Protocol (L2CAP). The LMP protocol layer contain bluetooth data packet struct, link creation and management, state machine and state management, piconet, master-slave equipment switching. The L2CAP protocol layer contains four functions: protocol multiplexing, partition and reorganization, quality of service, group abstraction, contains three kinds channel: connection channel, connectionless channel and signaling channel. Base on this foundation, proposed the simulation software plan on computer to realize LMP protocol and L2CAP protocol, to the simulated program design of data struction, the specify of realization flow, and has given out the graphic example of simulated program execute result.