【作者】 吴帆；

【导师】 熊文龙；

【作者基本信息】 武汉理工大学 ， 计算机应用技术， 2007， 硕士

【摘要】 蓝牙是短距离、低成本无线通讯技术之一。它可以用于替代移动设备之间的通讯电缆，从而形成个人无线网络。它不仅使计算机和通信的融合成为可能，而且随着它的不断进步，还可以把家电、娱乐电子产品与计算机、通信系统的终端融为一体，使人们在家里、办公室或其他公共场所就能实现统一的操作和控制，为办公室的自动化和家庭通信的实施创造了良好的条件。蓝牙技术可视为开放的、全球无线语音和数据通信的技术标准之一。基于蓝牙系统上的文件传输技术就是蓝牙的一个典型应用，它的开发为后期的蓝牙应用研究奠定了基础。蓝牙系统上的文件传输技术是在其文件传输协议栈的基础上实现的，主要由电缆替代协议层(RFCOMM)、逻辑链路控制与适配协议层(L2CAP)、服务发现协议层(SDP)、对象交换协议层(OBEX)和基带层(Baseband)组成。本文研究分析了OBEX会话层的应用接口模型；RFCOMM协议层的帧类型和帧结构；L2CAP层的状态变迁事件和动作以及L2CAP层通信信道建立、配置和终止过程；SDP层的服务发现与搜索。实现了RFCOMM层的服务注册与撤消、链接的建立与断开以及发送数据等功能；L2CAP层建立链接以及发送数据等，并给出了部分功能环节的实现流程和设计步骤。本文在分析实现文件传输模式的基础上，还进一步分析了蓝牙安全机制。研究分析了蓝牙通信协议规范中设计的蓝牙安全体系，以及各个协议层中所涉及的安全体系设计。针对现有的安全机制中存在的问题提出解决方案。更多还原

【Abstract】 Bluetooth is one of the short-distance, low-cost wireless communicationtechnologies. It was brought to replace cables between portable devices to form apersonal wireless local area network. Bluetooth can not only make it possible tocombine computer with communication technologies, but also integrate homeappliance, entertainment electric devices, computers and communication terminals.This will bring convenience in many situations such as home entertainment, officeaffairs or in some public sectors because Bluetooth can provide universal operationsand controls. In other words, Bluetooth provides us an easy approach of officeautomation and home communication. Bluetooth can be regarded as a kind of open,global wireless standard of voice and data communication technologies.File transmission technology based on the bluetooth system is a typic application,It build up the base for the bluetooth application research in future.File transmission technology based on the bluetooth system is implemented onthe basis of the protocol stack. Its software section consists of RFCOMM, L2CAP,SDP, OBEX (object exchange) and Baseband protocol. This dissertation analyses theapplication interface model of OBEX; the frame type and frame structure ofRFCOMM protocol; the event and action of change state of L2CAP and establish,configure, terminate of communication channel of L2CAP protocol; SDP provides ameans for application to discover which services are available. RFCOMM andL2CAP protocols are designed of the service registration andderegistration, connection and disconnection, sending data and so on, and the partflowcharts and steps are given. The packet format of file transmission and the codingtechniques of error correction are designed based on the analysis of the packet formatand structure of baseband.On the base of analyse of file transport mode, this paper also analyses thesecurity and security design of each protocol of Bluetooth system, and to table aproposal to the problem in security system.更多还原