基于BNEP蓝牙移动终端接入网络的研究

在对蓝牙技术和无线个人局域网进行分析和研究的基础上,详细地介绍了移动终端设备软件和蓝牙局域网接入点NAP在Windows系统上的实现过程。在防御蓝牙配对PIN码攻击方面提出了一种新的防御算法,提高了蓝牙网络的安全性能。     

妙用蓝牙30元组建无线网

蓝牙技术大家再熟悉不过了,我们今天的主题是“用蓝牙适配器组建局域网”,这可不是一个寻常的组网方式哦^-^下面就让我们一同来探讨一下。     

嵌入式操作系统中蓝牙支持软件的研究与开发

讨论在嵌入式操作系统中蓝牙支持软件的开发。包括蓝牙设备驱动程序、蓝牙协议栈、无线个人局域网应用框架等的设计与实现。采用系统化设计方法,重点突出结构设计、接口设计、任务设计。结果表明该蓝牙软件具有良好的可复用性、高效性和对嵌入式系统的适应性等特点,大大提高了系统开发效率。     

基于嵌入式Linux的蓝牙以太网关设计

蓝牙技术作为一种新型短程无线通信技术,存在与其他通信协议的兼容性问题,介绍了蓝牙基本组网机制和数据分组格式,深入分析了蓝牙业务发现协议SDP和蓝牙局域网接入规范LAP,提出本地接入点LAP和蓝牙终端的一般业务发现过程.然后,基于嵌入式Linux操作系统搭建蓝牙网关嵌入式开发平台,提出可行的蓝牙网关系统结构,实现蓝牙匹克网与有线以太网之间的互联互通.     

基于Bluez蓝牙协议栈的个域网用户节点的研究

本文通过对蓝牙个人局域网协议规范(PANP)的分析,阐述了在使用蓝牙技术构建Ad-hoc网络时个域网用户节点(PANU)角色任务及所应用的协议栈。接着进一步分析了基于嵌入式Linux系统的蓝牙Bluez协议栈和网络封装协议BNEP,并在所搭建的硬件系统平台上实现PANU节点的角色任务,构成了Ad-hoc网络。     

蓝牙在智能家居中设备识别的改进

蓝牙以其低成本、低功耗的无线接入方式,成为智能家居的首选。但由于邻居家庭间以及家庭内不同组网的蓝牙设备间存在干扰,使得蓝牙控制器进行设备识别以及组网的速度受到影响。本文利用FHS分组包中CoD字段携带家庭标识和微网标识的信息,有效地改善了蓝牙设备间的干扰,加快了设备识别的过程和提高了组网速度。最后,对蓝牙设备进出系统的情况作了重点分析,保证了整个系统的可行性。     

无线网络在网络阵地中的地位及其组网技术研究——蓝牙组网连接

随着计算机网络及通讯技术的发展,特别是无线网络逐渐普及,无线局域网的组建越来越受大众的欢迎。尽管组建无线局域网的方式及技术有很多,由于蓝牙作为一种小范围无线连接技术,它能够在各设备间实现方便快捷、灵活安全、低成本、低功耗的数据和语音通信,因此成为目前实现无线局域网连接的主流技术之一,发展前景极为广阔。本文通过对各种无线网络方案比较,来论述蓝牙组网的优越性及其实现模式。蓝牙的目标是让网络无处不在,最终连接任何东西。随着蓝牙标准2.0版本的推出,以及蓝牙设备的大幅降价（100米天线蓝牙适配器40元左右/个）,组建无线近距离网络会越来越经济实用。众所周知,蓝牙技术常应用于电脑和移动电话,现今许多的电子设备都已经采用蓝牙技术,实现了无线连通,如数码相机、摄像机、打印机、传真机等。不久的将来,具有蓝牙技术的设备会越来越多,蓝牙发展的前景会更值得我们期待。     

蓝牙安全研究

蓝牙是一种短距离射频（RF）通信开放标准。蓝牙技术主要用于建立无线个人局域网（WPAN）,并已被集成到多种类型的企业和消费者电子设备。本文介绍了蓝牙的技术特点、安全功能、存在的脆弱性和面临的威胁,并给出了蓝牙安全风险缓解对策建议。     

蓝牙技术在煤矿数据传输中的应用研究

文章分析了802.11b(无线局域网技术)、HomeRF(家庭无线局域网技术)、IrDA(红外技术)和蓝牙技术等各种短距离无线通信技术的优缺点,根据煤矿现场的实际情况,选择了蓝牙无线通信技术解决煤矿短距离数据传输的难题。文章提出了基于蓝牙技术的无线数据传输系统总体方案;分析了蓝牙通信原理与协议规范、蓝牙串口仿真协议(RFCOMM);以蓝牙串口应用框架为前提,确定了蓝牙通信替代电缆传输的实现模式;以CSR公司的单芯片蓝牙模块为核心,设计了系统的硬件电路;以蓝牙设备为基础,构建了点对点的数据传输系统硬件平台;提出了基于串口仿真协议的软件算法流程;根据蓝牙串口应用框架,设计了系统应用程序并在系统硬件平台上实现。实验结果表明,蓝牙模块RFCOMM服务功能完善,系统性能基本稳定。     

外刊精粹

用手机建“个人局域网” 想过用手机连接起您的笔记本电脑、PDA、数码相机、游戏机、甚至手表,组成一个“个人局域网”吗?只要这些设备都支持蓝牙,而且手机里安装一种软件——PMG(个人移动网关)就可以了。这种     

Wireless video sensor networks for sparse, resource-constrained, multi-robot teams

Small-size robots provide access and maneuverability in the tight confines of highly rubbled and uncertain environments such as those encountered in Urban Search and Rescue (USAR). Small size also provides easy portability and deployability and the potential for redundancy through multi-robot teaming. Unfortunately, small size does not diminish the data demands of these applications, such as high-resolution imagery and other forms of high bandwidth data. Furthermore, achieving redundancy in tight environments requires wireless operation to avoid the entanglement of tethers, but wireless communication links have proven unreliable in such environments. The net effect of this is a set of robust networking requirements that include high bandwidth, low latency, and low power with multi-hop routing in a sparse and highly volatile network configuration, which has been collectively difficult to achieve. Our metric for benchmarking these requirements is a stream of uncompressed 320 ×  240, 24-bit color images updated at 1 frame per second (roughly 1.8 Mbps - image compression is not the focus of this research as it only serves to increase the possible resolution or frame rate). No existing ad hoc wireless sensor network approaches have been able to achieve these requirements. Wi-Fi requires high power and size and does not have the latency, while Zig-bee does not have the bandwidth. Instead, this work focuses on augmenting the Bluetooth protocol, which is master/slave based, with a hybrid, multi-hop routing protocol. Bluetooth has the desired low power and high bandwidth characteristics, but lacks multi-hop routing and rapid recovery. In this paper, a hybrid routing protocol for ad hoc multi-robot networking is described that features: (1) high-bandwidth, (2) low power, and (3) low latency of data traffic for sparse, highly volatile networks—exactly what is required for large teams of highly distributed, small-scale robots. Furthermore, this paper compares simulations and robot implementations of different routing protocols over Bluetooth sensor networks and demonstrates the viability of our protocol as a wireless network solution for multi-robot teams characterized by high mobility in difficult RF environments. To the best of our knowledge, the work presented in this paper is the first attempt at comparison of different routing protocols for real robots with physical experiments over Bluetooth sensor networks.     

蓝牙技术及其现状与发展浅析

蓝牙技术是最近几年新发展起来的一种通用短距离无线数据/话音通信标准(或称作连接协议)。概 述了蓝牙的发展过程、技术特点及组网能力;介绍了蓝牙技术的应用领域以及有待解决的问题与未来发展趋势。     

Enhanced service discovery in Bluetooth

The rapid evolution and expansion of wireless-enabled environments have increased the need for sophisticated service discovery protocols (SDPs). Typically, service discovery involves a client, service provider, and lookup or directory server. The paper discusses Bluetooth (http://www.bluetooth.com) short-range wireless technology. The Bluetooth protocol stack includes specifications that define the SDP, RFCOMM (for cable replacement), the logical link control and adaptation protocol (L2CAP), a host controller interface (HCI), the link manager protocol (LMP), the base-band protocol, and a radio frequency (RF) protocol. The paper considers Bluetooth service discovery improvements with semantic matching     

蓝牙Ad hoc网络形成算法的性能评价

评价一个蓝牙Adhoc网络形成算法的优劣可以用不同方法和性能指标来衡量。文中首先介绍了蓝牙Adhoc网络的拓扑结构,然后讨论了评价蓝牙Adhoc网络形成算法的主要手段和性能指标,对目前主要的蓝牙Adhoc网络形成协议的性能进行了总结和比较。此外,还对树型散射网形成(Tree Scattemet Formation,TSF)协议的部分性能指标进行了仿真,给出了相应的性能仿真曲线。最后总结现有网络形成协议存在的问题,分析业界关注的重点及今后可能的研究方向。     

A location-aware multicasting protocol for Bluetooth Location Networks

Bluetooth Location Network (BLN) is a Bluetooth radio network that is composed of some mobile Bluetooth devices and static Bluetooth units, and is established at the system initialization to form a spontaneous network topology. In a BLN, a multicast service is defined as the periodical delivering of messages from a Service Server to a set of mobile devices which are the multicast members predefined by the Service Server. Several multicast protocols have been proposed for the Ad-Hoc networks, but they create an inefficient multicast tree for the BLN due to the existing differences in the radio characteristics between Ad-Hoc and Bluetooth radio networks. The present paper analyzes these differences and proposes a novel multicasting protocol for constructing an efficient multicast tree in a BLN. The proposed protocol constructs a multicast tree with good features which include the shortest path, a higher degree of path sharing, and fewer forwarding nodes. Simulation results reveal that the proposed multicast protocol outperforms the existing multicast protocols in the BLN.     

Bluetooth: technology for short-range wireless apps

In 1998, five major companies (Ericsson, Nokia, IBM, Toshiba and Intel) formed a group to create a license-free technology for universal wireless connectivity in the handheld market. The result is Bluetooth, a technology named after a 10th-Century king who brought warring Viking tribes under a common rule. The Bluetooth specifications (currently in version 1.1) define a radiofrequency (RF) wireless communication interface and the associated set of communication protocols and usage profiles. The link speed, communication range and transmission power level for Bluetooth were chosen to support low-cost, power-efficient, single-chip implementations of the current technology. In fact, Bluetooth is the first attempt at making a single-chip radio that can operate in the 2.4-GHz ISM (industrial, scientific and medical) RF band. While most early Bluetooth solutions are dual-chip, vendors have recently announced single-chip versions as well. In this overview of the technology, I first describe the lower layers of the Bluetooth protocol stack. I also briefly describe its service discovery protocol and, finally, how the layers of the protocol stack fit together from an application's point of view     

JXTA: a network programming environment

JXTA technology, from Sun Microsystems, is a network programming and computing platform that is designed to solve a number of problems in modern distributed computing, especially in the area broadly referred to as peer-to-peer (P2P) computing or P2P networking. JXTA provides a network programming platform specifically designed to be the foundation for P2P systems. As a set of protocols, the technology stays away from APIs and remains independent of programming languages. This means that heterogeneous devices with completely different software stacks can interoperate through JXTA protocols. JXTA technology is also independent of transport protocols. It can be implemented on top of TCP/IP, HTTP, Bluetooth, HomePNA, and many other protocols     

The BTRC Bluetooth remote control system

Emerging radio technologies like WLAN and Bluetooth enable electronic devices of any kind to communicate with one another. A simple and easy to implement application layer protocol called BTRC protocol was developed allowing devices to exchange data of any kind and format over different protocols like TCP/IP or Bluetooth. Based upon this protocol a universal remote control system was implemented. Software applications simulating cellular phones and personal digital assistants (PDA) were developed as remote control devices. BTRC server devices send their graphical XML based user interface to the remote control. In this way, the use of household devices is simplified significantly.     

多层卫星网络路由协议研究

多层卫星网络是卫星星座发展的一种理想组网模式,组网的关键技术在于路由协议的选取和设计。本文介绍了多层卫星网络的概况,按照不同的标准对现有多层卫星网络路由协议进行了分类,详细分析了现有的几类典型的路由协议,指出了存在的问题,并对以后的研究方向作了展望。     

TARP: A traffic-aware restructuring protocol for Bluetooth radio networks

Bluetooth is a low-cost and short-range wireless communication technology. The Bluetooth device randomly searches and connects with other devices using the inquiry/inquiry scan and the page/page scan operations, resulting an uncontrolled scatternet topology. The unpredictable scatternet topology usually raises the problem of redundant traffic and causes inefficient communications. A traffic-aware restructuring protocol (TARP) is presented for partially restructuring a piconet or a pair of two neighboring piconets by applying role switch mechanism. The proposed TARP mainly consists of intra-piconet and inter-piconet restructuring protocols. According to the recent routes and their traffic load information, the intra-piconet restructuring protocol adjusts piconet structure by selecting the proper device to play a master role of a piconet and applies takeover operation to rapidly restructure the piconet topology. The inter-piconet restructuring protocol exchanges devices of two neighboring piconets to reduce the route length and thus improve the power and bandwidth consumptions and the end-to-end transmission delay. Performance results reveal that the proposed restructuring protocols reduce path length of recent routes and save power consumption, thus significantly improve the performance for a given connected scatternet.