传感器网络多址接入协议的实现

无线传感器网络(WSN)由于其巨大的应用潜力成为近年来研究者们广泛关注的热点问题.WSN中的多址接入协议(MAC-Medium Access Control)决定了各节点是否能够高效的共享信道,因此直接影响到了WSN的性能.文中针对突发业务环境的无线传感器网络实现了一种新型S_MAC协议,详细论述该协议设计中的关键步骤以及对应的策略,并将该算法移植到了传感器节点的开发平台上.最后通过在硬件平台的测试,得到了正确的输出波形.     

Delay aware reliable transport in wireless sensor networks

Wireless sensor networks (WSN) are event‐based systems that rely on the collective effort of several sensor nodes. Reliable event detection at the sink is based on collective information provided by the sensor nodes and not on any individual sensor data. Hence, conventional end‐to‐end reliability definitions and solutions are inapplicable in the WSN regime and would only lead to a waste of scarce sensor resources. Moreover, the reliability objective of WSN must be achieved within a certain real‐time delay bound posed by the application. Therefore, the WSN paradigm necessitates a collective delay‐constrained event‐to‐sink reliability notion rather than the traditional end‐to‐end reliability approaches. To the best of our knowledge, there is no transport protocol solution which addresses both reliability and real‐time delay bound requirements of WSN simultaneously. In this paper, the delay aware reliable transport (DART) protocol is presented for WSN. The objective of the DART protocol is to timely and reliably transport event features from the sensor field to the sink with minimum energy consumption. In this regard, the DART protocol simultaneously addresses congestion control and timely event transport reliability objectives in WSN. In addition to its efficient congestion detection and control algorithms, it incorporates the time critical event first (TCEF) scheduling mechanism to meet the application‐specific delay bounds at the sink node. Importantly, the algorithms of the DART protocol mainly run on resource rich sink node, with minimal functionality required at resource constrained sensor nodes. Furthermore, the DART protocol can accommodate multiple concurrent event occurrences in a wireless sensor field. Performance evaluation via simulation experiments show that the DART protocol achieves high performance in terms of real‐time communication requirements, reliable event detection and energy consumption in WSN. Copyright © 2007 John Wiley & Sons, Ltd.     

Smartphone with Augmented Gateway Functionality as Opportunistic WSN Gateway Device

Sensors and actuators are being increasingly deployed for monitoring and controlling different phenomena and processes in a stand-alone manner or attached to sensor nodes with communication capabilities as part of larger wireless sensor networks (WSN). In addition to the protocols for communication within the WSN, sensor nodes may also provide the gateway functionality towards other networks and/or support communication with other external devices. These devices either represent additional gateways for exposing data and metadata to external networks, or serve as connection points to WSN for instance for the on-site calibration and maintenance. Smartphones as advanced mobile terminals appear particularly suitable for such role. This paper investigates the role a smartphone augmented with WSN gateway functionality can play in WSN with respect to regular dedicated sensor and gateway nodes. As a practical example we show the implementation of a gateway augmented smartphone using a Samsung i8910 phone and a VESNA sensor node connected via Bluetooth. The role of a gateway augmented smartphone is to interface between WSN, which is using a proprietary networking protocol, and the mobile network. The data obtained from WSN can be enriched using smartphone’s embedded sensors before being sent to the remote server. We demonstrate this on an example of geo-tagging the collected data from WSN with the smartphone’s Global Positioning System-based location data.     

基于TinyOS的无线传感器网络节点设计

本文从硬件和软件两个方面分析了构建无线传感器网络节点的一般规律和方法,设计了以msp430控制芯片和D21DL无线数传电台为核心的无线传感器网络硬件平台、无线传感器网络系统软件移植了加州大学伯克利学院开发的专用于无线传感器网络的TinyOS开源系统,在此基础上进行硬件驱动以及上层通讯协议的开发。     

An Integrated Trust Assisted Energy Efficient Greedy Data Aggregation for Wireless Sensor Networks

Wireless Personal Communications - Wireless sensor networks (WSN) gathers information pertaining to sensitive data. As because the sensor nodes in WSN are remote and unattended for a longer period...     

传感器网络数据融合层的研究与设计

节约能源是传感器网络面临的一个核心问题。针对传感器网络中数据冗余度较高的特点，设计了在传感器网络协议栈中建立数据融合层，通过减少网络中的数据包传输数目，达到降低网络能耗、延长网络生存时间的目的。并在传感器网络操作系统TinyOS上对数据融合层进行了实现。最后通过性能分析，验证了数据融合层的功效。     

基于云计算和动态贝叶斯博弈的WSN恶意程序传播优化抑制方法

为有效地应用入侵检测系统检测WSN（wireless sensor network,无线传感网络）恶意程序从而抑制WSN恶意程序传播,在考虑WSN节点资源有限和云计算平台资源几乎无限的现状基础上,借助云计算平台提出WSN入侵检测网络结构。依据传感节点和WSN入侵检测代理之间博弈过程的分析,使用动态贝叶斯博弈建立了考虑WSN入侵检测代理监控数据发送能耗和传感节点隐私保护需求的WSN恶意程序传播抑制博弈模型。依据建立的博弈类型,并基于精炼贝叶斯均衡提出抑制WSN恶意程序传播的优化策略,并给出具体的算法。实验分析了影响WSN入侵检测代理选择优化策略的因素,为具体应用提供了实验依据。     

Optimization Based Multi-Objective Weighted Clustering For Remote Monitoring System in WSN

Wireless Sensor Network (WSN) is generally considered as a standout amongst the most critical advancements for the twenty-first century, it normally comprises multifunctional wireless sensor nodes, with detecting, communications, and calculation capacities. Clustering the random nodes in WSN is a challenging task with high performance. This paper presents the new clustering model to monitor the eco-friendly mobile network by clustering the sensor nodes and to enhance the Quality of Service of that optimal network in WSN. The proposed Multi-Objective Weighted Clustering model groups the arbitrary nodes and afterward the optimal network is achieved by the optimization of network parameters. For optimizing the network parameters, a metaheuristic algorithm i.e. Improved Fruit Fly Optimization is introduced. With the goal of assessing the Coverage Efficiency (CE) and network user satisfaction of the accomplished optimal mobile network in WSN, the remote sensor monitoring process is applied. Sensor monitoring helps to know the network users and furthermore to improve the CE of WSN, contrasted with existing work.

     

基于MIMO的节能无线传感器网络

当今无线传感器网络主要是同构网络,即网络中传感器节点结构相同,该结构不适合基于组的传感器网络.本文通过使用多天线传感器节点作为无线传感器网络中的组长节点将MIMO和SIMO方式引入组间层和组内层组员与组长之间的通讯.文中介绍了该异构网络的基本通讯机制并对其实现进行了讨论,并提出了MIMO的传感器网络功耗和延迟模型.通过模拟实验验证了该模型优于同构网络.     

Wireless Sensor Network Path Optimization Using Sensor Node Coverage Area Calculation Approach

The proposed work is based on the path optimization approach for wireless sensor network (WSN). Path optimization is achieved by using the NSG 2.1 Tool, TCL Script file and NS2 simulator to improve the quality of service (QoS). Path optimization approach finds best suitable path between sensor nodes of WSN. The routing approach is not only the solution to improve the quality but also improves the WSN performance. The node cardinally is taken under consideration using the ad-hoc on demand distance vector routing protocol mechanism. Ad hoc approach emphasize on sensor nodes coverage area performance along with simulation time. NSG 2.1 Tool calculates the sensor node packet data delivery speed which can facilitate inter-node communication successfully. An experimental result verified that the proposed design is the best possible method which can escape from slow network response while covering maximum sensor nodes. It achieves coverage support in sensor node deployment. The result outcomes show best path for transferring packet from one sensor node to another node. The coverage area of sensor node gives the percentage of average coverage ratio of each node with respect to the simulation time.

     

无线传感器网络——概念、应用及其对抗研究

无线传感器网络的问世和潜在应用前景，大有引发一场新技术革命的势头。由于具有节点数量巨大、分布密集、布设灵活以及自组织组网等特点，无线传感器网络充分体现了网络中心战的概念，在未来电子战／信息战领域有着广阔的应用前景。文章描述了无线传感器网络的基本组成及其在电子战／信息战领域的可能应用，分析研究了这种网络的薄弱环节及对抗的可行途径，并据此建议，在发展无线传感器网络技术的同时，应积极开展其军事应用和关键对抗技术的研究。     

A scalable sensor network using a polar coordinate system

Due to the quick development of chip design and antenna manufacturing techniques, wireless facilities, such as wireless sensors, have become significantly smaller and cheaper than before. Their usage has also consequently been widely enriched, such as in the areas of healthcare and forest monitoring. A wireless sensor network (WSN) is often used to monitor a specific environment for a specific purpose. However, how to effectively utilize the limited resources in a sensor, also in a WSN, is crucial. In a WSN, geographical information is usually employed to locate a node and its surroundings. In this article, we propose a system, named relative position for sensor routing using polar-coordinates (RP²), that deploys a polar coordinate system to identify sensor positions and route network packets. A sensor ID that carries geographical metadata can be helpful in positioning a sensor.     

THE NOVEL COMMUNICATION ALGORITHM AND THE THROUGHPUT ANALYSIS FOR WIRELESS SENSOR NETWORKS

Aiming at the significance of the energy controls of wireless sensor networks, an economical energy consumption algorithm for wireless communicating in Wireless Sensor Networks (WSN) is presented. Based on the algorithm, the maximal system throughput of WSN is analyzed, and the upper bound of throughput of WSN is proposed and proved. Some numerical simulations are conducted and analyzed. The conclusions include that the transmitting radius of sensor node and the parameters of the energy cost function have significant influence upon the throughput, but the monitoring region radius has little influence. For the same transmitting distance, the more the hopping of information trans- mitting, the better the throughput of WSN. On the other hand, for the energy optimization of the whole WSN, the trade-off problem between the throughput capacity and the relay nodes is proposed, and the specific expression of relay hops that minimized the energy consumptions and the maximal throughput of WSN under the specific situation is derived.     

基于无线传感器网络的仓库智能安保系统设计

将无线传感器网络技术用于智能仓库安保系统。针对无线传感器网络技术和智能仓库安保系统的特点。设计了基于无线传感器网络的智能仓库安保系统的一整套系统和网络节点。该系统体现了无线传感器网络的特点。利用计算机处理信息,根据处理结果作出相应反应、处理。实验表明,该系统使用方便、稳定可靠。     

无线传感器网络的路由协议分析

无线传感器网络是由大量微型传感器节点组成的一个自组织的网络系统,路由协议是其关键技术之一.现有的路由协议分为:能量感知路由协议、以数据为中心的路由协议、基于地理位置的路由协议、可靠的路由协议和层次路由协议五类,对每类协议的特点和比较典型的协议进行了介绍.     

一种基于Zigbee的无线传感器网络教学实验系统

本文首先简要介绍无线传感器网络的体系结构，然后给出一个基于IEEE802．15．4和Zigbee协议的无线传感器网络教学实验系统。该系统中的多个传感器节点可以组成多种不同的拓扑结构，并可以将采集到的数据通过GSM网络发送到用户终端，用户也可以通过GSM网络对远程传感器节点进行控制。该教学实验系统已被许多院校采用，亦可直接应用于其他领域。     

小型无线传感器网络的实现与P2P互联

传感器网络之间的互联与通信将成为未来无线传感器网络的应用模式之一,通过P2P技术互联多小传感器网络,奇为用户提供大规模、大范围、多样化的信息服务。在设计和实现基于SimplciTl协议的小型无线传感器网络的基础上,提出在无线传感器网络上的P2P覆盖,利用JXTA协议搭建P2P平台,实现了多个传感器网络以P2P的方式互联,并给出了硬件和软件的实现方案。     

Blockchain Paradigm and Internet of Things

Wireless Personal Communications - Wireless sensor network (WSN) with mobile sink serves a lot of industrial and agricultural monitoring applications. The data collection with WSN has been...     

Hybrid Bird Swarm Optimized Quasi Affine Algorithm Based Node Location in Wireless Sensor Networks

Wireless Personal Communications - Wireless sensor networks (WSN) with the Internet of Things (IoT) play a vital key concept while performing the information transmission process. The WSN with IoT...     

Secure and Energy-Efficient Traffic-Aware Key Management Scheme for Wireless Sensor Network

In Wireless Sensor Network (WSN), a sensor node may communicate with a small set of neighbor sensor nodes. Existing key management schemes, did not consider this communication between these nodes. They establish shared keys for all pairs of neighbor sensor nodes. When the number of sensor nodes in WSN is augmented, large number of keys is to be loaded in each sensor node, which in turn causes supplementary energy consumption. If any two close sensor nodes are seldom in the active-state the assignment of shared keys may be gratuitous, since they may be hardly exploited.In this paper, based on this information, secure and Energy-Efficient Traffic Aware key Management (EETKM) is developed for WSN. This determines shared keys for active sensors which takes part in the direct communication. In order to broadcast keys without retransmission or acknowledgements, the proposed scheme gives an efficient Re-keying mechanism. The proposed scheme attains high connectivity which is shown through numerical results. The proposed scheme is applied for various routing protocols and the simulation results shows the stronger resilience, low energy consumption and increased delivery ratio.