共查询到19条相似文献,搜索用时 125 毫秒
1.
基于P2P的无线传感器网络应用架构研究 总被引:3,自引:0,他引:3
通过基础网络互联多个传感器网络,为用户提供大规模、大范围、多样化的信息服务成为未来无线传感器网络的应用模式之一。据此,提出了一种基于P2P(Peer-to—Peer)技术的无线传感器网络应用架构。采用P2P技术,解决了大数据量的通信瓶颈,传感器网络亦可自由加入、变更或退出,方便部署,网络可扩展性好.同时屏蔽底层网络差异及多种接入方式.为用户提供多个访问入口。 相似文献
2.
在无线信道环境下,如何解决逻辑拓扑与物理拓扑之间的失配是设计P2P网络的主要挑战之一。本文提出一种适用于无线系统的P2P组网协议。在该协议中,首先,新入网节点从其邻居节点处获得一个数值上相近的节点标号,从而实现网络的瞬时拓扑感知。当节点的位置改变时,它们向中心节点更新自己的位置信息。然后,在中心节点处将节点标号的最优分配转换为旅行商问题,并用模拟退火算法对旅行商问题进行最优化求解,得到优化标号序列。最后,由中心节点向网络广播更新信息,引导节点进行标号和数据交换,从而使无线P2P网络在任何时刻都具有拓扑感知性。仿真结果表明,在基于该协议的无线P2P网络中,文件的定位路径明显缩短,定位延时明显减小。 相似文献
3.
无线传感器网络与其他网络的互联是无线传感器网络研究热点方向之一,基于IPv6的全IP化互联方式是当前最受关注的焦点。本文介绍了在IP化无线传感器网络上实现REST风格服务的受限应用层协议CoAP,比较了CoAP与HTTP的不同和性能差异,最后提出和总结了基于CoAP的无线传感器网络与互联网的两种互联方式。 相似文献
4.
为了适应未来市场的需求,新一代有线数字电视传送网络必须具有多传感器信息访问及设备互联能力。因此,无线传感器网络技术的引进势在必行。为了实现新一代有线数字电视网络延伸,进一步涵盖更多的区域,增加额外价值效益,通过集成新一代有线数字电视传输网络为骨干传输,搭建用户端无线传感器网络,其中网络架构设计包括物理网络构建和协议体系、无线及有线数字电视网络互联方案以及业务类别设计等内容。 相似文献
5.
随着现代通信技术的不断发展,P2P(对等网络)技术与SIP(会话初始化协议)之间相互融合成为当前研究的一个热点。文章首先介绍了P2P技术和SIP协议,随后研究怎样将P2P架构与SIP系统进行融合,重点讨论了P2P-SIP的实现过程,包括P2P-SIP终端如何使用SIP协议携带P2P消息实现节点的发现、加入、离开和用户注册等过程。 相似文献
6.
无线Ad Hoc网络和P2P技术近年来发展迅速,已经成为宽带无线网络技术领域的研究热点.相关研究表明.在现有的无线Ad Hoc网络中直接应用P2P技术.会造成系统开销大量增加,分组传输效率及查询成功率下降,从而影响整个网络的性能.本文针对上述问题进行分析,采用跨层设计的方法,提出了在无线Ad Hoc网络中实现P2P应用的解决思路和方案,满足无线Ad Hoc网络中各种P2P应用的不同QoS需求. 相似文献
7.
SIP协议是当前VoIP和IM等多媒体协议的呼叫建立协议。P2P技术提供了分布式的网络架构中通信节点之间得对等通信能力,P2P网络架构经历了集中目录式网络架构、纯P2P网络架构、混合式P2P网络架构和结构化P2P网络架构。通过引入P2P技术,SIP网络的能力可以得到增强。P2PSIP网络主要有两个重要的操作:对P2P节点的操作和用户层面的操作。 相似文献
8.
IPv6无线传感器网络的研究及其应用 总被引:2,自引:0,他引:2
将IPv6与无线传感器网络技术结合起来的IPv6无线传感器网络引起了越来越多国内外研究机构与组织的重视。为了实现IPv6技术与无线传感器网络技术的完美融合,需要全面设计新型的无线传感器网络体系结构。文章充分考虑IPv6以及无线传感器网络的技术特点,提出IPv6无线传感器网络体系结构,并开发出一套适用于大规模无线传感器网络应用的嵌入式IPv6微型协议栈,在此基础上,根据实际应用需求,给出IPv6无线传感器网络与Internet互联的两种不同方式,并给出一个在精准农业生产中典型应用实例。 相似文献
9.
P2P流媒体系统近年来发展非常迅速,显示了巨大的生命力,但是另一方面现有的P2P流媒体系统又存在很多问题:文件定位技术、节点选择技术、网络不稳定性及网络带宽等等。大量的理论研究表明,网络编码可以提高系统的稳定性,提高网络带宽的利用率,而SIP协议可以有效控制和管理P2P网络。文章将网络编码和SIP协议应用到P2P流媒体系统中,目的是解决现有P2P流媒体系统的普遍问题。试验结果表明,应用网络编码技术和SIP协议的P2P流媒体播放系统,在网络健壮性、播放质量、网络资源利用率等方面都有良好的改善。 相似文献
10.
11.
SNMS: an intelligent transportation system network architecture based on WSN and P2P network 总被引:3,自引:0,他引:3
LI Li LIU Yuan-an TANG Bi-hua Wireless Center Beijing University of Posts Telecommunications Beijing China 《中国邮电高校学报(英文版)》2007,14(1):65-70
With the development of city road networks, the question of how to obtain information about the roads is becoming more and more important. In this article, sensor network with mobile station (SNMS), a novel two-tiered intelligent transportation system (ITS) network architecture based on wireless sensor network (WSN) and peer-to-peer (P2P) network, is proposed to provide significant traffic information about the road and thereby, assist travelers to take optimum decisions when they are driving. A detailed explanation with regard to the strategy of each level as well as the design of two main components in the network, sensor unit (SU) and mobile station (MS), is presented. Finally, a representative scenario is described to display the operation of the system. 相似文献
12.
无线传感器网络是复杂的无线网络。无线传感器网络拥有大量的网络节点。网络节点是无线传感器网络的基础。为了研究复杂的无线传感器网络,采用了神经元描述了WSN的网络节点,用神经元模型表示了无线传感器网络。给出了无线待感器网络节点的神经元模型和无线传感器网络的神经网络模型,并将神经网络应用于无线传感器网络的数据融合应用。结果表明,基于神经网络的无线传感器网络研究可以使得复杂研究变得简单,利于开展WSN的深入研究。 相似文献
13.
14.
The recent development of microelectronics techniques and advances in wireless communications have made it feasible to design low-cost, low-power, multifunctional and intelligent sensor nodes for wireless sensor networks (WSN). The design challenges for an efficient WSN mainly lie in two issues power and security. The Rijindael algorithm is a candidate algorithm for encrypting data in WSN. The SubByte (S-box) transformation is the main building block of the Rijindael algorithm. It dominates the hardware complexity and power consumption of the Rijindael cryptographic engine. This article proposes a clock-less hardware implementation of the S-box. In this S-box, 1) The composite field arithmetic in GF((24))2 was used to implement the compact datapath circuit; 2) A high-efficiency latch controller was attained by utilizing the four-phase micropipeline. The presented hardware circuit is an application specific integrated circuit (ASIC) on 0.25 μm complementary mental oxide semiconductor (CMOS) process using three metal layers. The layout simulation results show that the proposed S-box offers low-power consumption and high speed with moderate area penalty. This study also proves that the clock-less design methodology can implement high- performance cryptographic intellectual property (IP) core for the wireless sensor node chips. 相似文献
15.
16.
Marko Pesko Miha Smolnikar Matevž Vučnik Tomaž Javornik Milica Pejanović-Djurišić Mihael Mohorčič 《Wireless Personal Communications》2014,78(3):1811-1826
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. 相似文献
17.
Wireless Personal Communications - The wireless sensor networks WSN is the most substantial network utilized in the IoT based applications. The WSN consists of various sensor nodes used for the... 相似文献
18.
19.
Ismat Najma Qureshi Rehan Mumtaz ul Imam Syed 《Wireless Personal Communications》2019,106(4):2195-2210
Wireless Personal Communications - One of the major factors that affects the performance of wireless sensor networks (WSN) is its limited battery capacity. Mobile wireless sensor networks (MWSN)... 相似文献