共查询到20条相似文献,搜索用时 31 毫秒
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《Selected Areas in Communications, IEEE Journal on》2009,27(4):400-411
This study presents a healthcare monitoring architecture coupled with wearable sensor systems and an environmental sensor network for monitoring elderly or chronic patients in their residence. The wearable sensor system, built into a fabric belt, consists of various medical sensors that collect a timely set of physiological health indicators transmitted via low energy wireless communication to mobile computing devices. Three application scenarios are implemented using the proposed network architecture. The group-based data collection and data transmission using the ad hoc mode promote outpatient healthcare services for only one medical staff member assigned to a set of patients. Adaptive security issues for data transmission are performed based on different wireless capabilities. This study also presents a monitoring application prototype for capturing sensor data from wireless sensor nodes. The implemented schemes were verified as performing efficiently and rapidly in the proposed network architecture. 相似文献
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A large part of mobile Health (mHealth) use-cases such as remote patient monitoring/diagnosis, teleconsultation, and guided surgical intervention requires advanced and reliable mobile communication solutions to provide efficient multimedia transmission with strict medical level Quality of Service (QoS) and Quality of Experience (QoE) provision. The increasing deployment of overlapping wireless access networks enables the possibility to offer the required network resources for ubiquitous and pervasive mHealth services. To address the challenges and support the above use-cases in today’s heterogeneous network (HetNet) environments, we propose a network-assisted flow-based mobility management architecture for optimized real-time mobile medical multimedia communication. The proposed system is empirically evaluated in a Pan-European HetNet testbed with multi-access Android-based mobile devices. We observed that the proposed scheme significantly improves the objective QoE of simultaneous real-time high-resolution electrocardiography and high-definition ultrasound transmissions while also enhances traffic load balancing capabilities of wireless architectures. 相似文献
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将无线通信网络技术引入智慧医疗、智慧家庭等前沿的智慧城市技术领域,设计并实现了一种支持多监测点自由接入的无线便携式生物电信号智能监测与显示系统.提出了一种异步缓存机制,降低系统运算复杂度及开销,解决实时监测数据与现有无线网络接入问题;改进无线网络数据传输点协调控制(PCF)机制,提出优先级轮询及动态调整重发上限等技术手段,提高无线网络的通信效率,保证多用户情况下的实时监测与波形显示稳定性.通过NS2仿真及系统整体实测,表明设计能够达到连续不间断的无线监测与视频显示效果,与现有采用DCF和PCF网络机制相比,传输延迟降低5%和1%,且接入的设备数量越多优势越体现.该设计大幅改善设备使用灵活性与实用性,突破现有设备因体积及有线连接等方式只能局限于医疗机构等场地使用的限制,适用于智慧城市对智能健康监护的多用户、可移动、无线化、远程诊断与记录发展需求. 相似文献
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Design and Realization of an NFC-Driven Smart Home System to Support Intruder Detection and Social Network Integration 下载免费PDF全文
Jen-Jee Chen Zheng-Xun Jiang Yue-Liang Chen Wen-Tai Wu Jia-Ming Liang 《电子科技学刊:英文版》2015,13(2):163-168
The Internet of thing (IoT) emerges as a possible solution to realize a smart life in the modern age. In this article, we design and realize a novel near field communication (NFC)-driven smart home system for IoT, which integrates the wireless sensor network (WSN), social networks, and the cloud computing. NFC technology provides a way for users to exchange information between them and the system by simply contacting. So, we propose to use NFC as the system drive in the architecture, such that users can intuitively interact with the system and deliver their intentions. Then, the corresponding service over the system will control or adjust the things at home to fit users' needs. Furthermore, the proposed system provides a platform for developers to easily and rapidly implement their smart home related services. In the system, WSN sensing and control, NFC communications and identification, user profile management and preference analysis, and social network integration are all provided as platform services. We will show how the system works for home automation, intruder detection, and social network sharing. 相似文献
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Upendra Rathnayake Henrik Petander Maximilian Ott Aruna Seneviratne 《Mobile Networks and Applications》2012,17(2):216-233
With the mobile communication market increasingly moving towards value-added services, the network cost will need to be included
in the service offering itself. This will lead service providers to optimize network usage based on real cost rather than
simplified network plans sold to consumers traditionally. Meanwhile, today’s mobile devices are increasingly containing multiple
radios, enabling users on the move to take advantage of the heterogeneous wireless network environment. In addition, we observe
that many bandwidth intensive services such as video on demand and software updates are essentially non real-time and buffers
in mobile devices are effectively unlimited. We therefore propose EMUNE, a new transfer service which leverages these aspects.
It supports opportunistic bulk transfers in high bandwidth networks while adapting to device power concerns, application requirements
and user preferences of cost and quality. Our proposed architecture consists of an API, a transport service and two main functional
units. The well defined API hides all internal complexities from a programmer and provides easy access to the functionalities.
The prediction engine infers future network and bandwidth availability. The scheduling engine takes the output of the prediction
engine as well as the power and monetary costs, application requirements and user preferences into account and determines
which interface to use, when and for how long for all outstanding data transfer requests. The transport service accordingly
executes the inferred data transfer schedule. The results from the implementation of EMUNE’s and of the prediction and scheduling
engines evaluated against real user data show the effectiveness of the proposed architecture for better utilization of multiple
network interfaces in mobile devices. 相似文献
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基于802.11n标准的校园无线网的规划与设计 总被引:3,自引:0,他引:3
随着基于802.11n标准的WLAN技术的日臻完善,许多制约传统WLAN发展的因素得到较大改善。笔记本电脑等无线终端在大学校园的普遍使用,也对无线校园网的建设提出了新的要求。根据802.11n标准的技术特点,针对传统WLAN中存在的突出问题,通过案例研究与文献研究相结合的方式,在无线网络组网方式、网络安全、漫游方式、网络管理及测试方案等方面做了相关的探讨和研究。并结合大学校园网的特征,给出了一个高速、安全、便捷的无线校园网组网参考方案。 相似文献
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Farid Touati Adel Ben Mnaouer Ochirkhand Erdene‐Ochir Waiser Mehmood Ammad Hassan Brahim Gaabab 《Wireless Communications and Mobile Computing》2016,16(10):1271-1281
Technology has revolutionized medical practices by enabling more convenient and non‐intrusive monitoring of patient's health, leading to next generation ubiquitous healthcare (u‐healthcare). The exploitation of the Internet protocol version 6 addressing space along with the miniaturization of electronic devices has fostered providing interoperability and connectivity of wearable sensor devices in wireless body area networks to the Internet of Things. In this paper, we propose to integrate the IPv6 over low power wireless personal area network (6LoWPAN) to the u‐healthcare monitoring system architecture. The main objective is to study the feasibility of the 6LoWPAN‐enabled platform in real‐world scenarios dealing with medical data. The performance evaluation of this platform is carried out initially through simulations using OMNet++ and then supported by an experimental study using sensor motes and a customized micro‐computing unit. Performance metrics such as throughput, end‐to‐end delay, packet error rate, and energy consumption are investigated under acute health conditions, where patient's health information has to be sent continuously and at maximum rate to the care provider. The obtained results show that the proposed 6LoWPAN solution fulfills the main quality of service requirements of u‐healthcare applications. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
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He D Chen C Chan S Bu J Vasilakos AV 《IEEE transactions on information technology in biomedicine》2012,16(4):623-632
Wireless medical sensor networks (MSNs) enable ubiquitous health monitoring of users during their everyday lives, at health sites, without restricting their freedom. Establishing trust among distributed network entities has been recognized as a powerful tool to improve the security and performance of distributed networks such as mobile ad hoc networks and sensor networks. However, most existing trust systems are not well suited for MSNs due to the unique operational and security requirements of MSNs. Moreover, similar to most security schemes, trust management methods themselves can be vulnerable to attacks. Unfortunately, this issue is often ignored in existing trust systems. In this paper, we identify the security and performance challenges facing a sensor network for wireless medical monitoring and suggest it should follow a two-tier architecture. Based on such an architecture, we develop an attack-resistant and lightweight trust management scheme named ReTrust. This paper also reports the experimental results of the Collection Tree Protocol using our proposed system in a network of TelosB motes, which show that ReTrust not only can efficiently detect malicious/faulty behaviors, but can also significantly improve the network performance in practice. 相似文献
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Zhigang Hua Xing Xie Hao Liu Hanqing Lu Wei-Ying Ma 《Mobile Computing, IEEE Transactions on》2006,5(12):1650-1662
Currently, people gain easy access to an increasingly diverse range of mobile devices such as personal digital assistants (PDAs), smart phones, and handheld computers. As dynamic content has become dominant on the fast-growing World Wide Web (C. Yuan et al., 2003), it is necessary to provide effective ways for the users to access such prevalent Web content in a mobile computing environment. During a course of browsing dynamic content on mobile devices, the requested content is first dynamically generated by remote Web server, then transmitted over a wireless network, and, finally, adapted for display' on small screens. This leads to considerable latency and processing load on mobile devices. By integrating a novel Web content adaptation algorithm and an enhanced caching strategy, we propose an adaptive scheme called MobiDNA for serving dynamic content in a mobile computing environment. To validate the feasibility and effectiveness of the proposed MobiDNA system, we construct an experimental testbed to investigate its performance. Experimental results demonstrate that this scheme can effectively improve mobile dynamic content browsing, by improving Web content readability on small displays, decreasing mobile browsing latency, and reducing wireless bandwidth consumption 相似文献
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Omar R. Daoud Qadri J. Hamarsheh Ahlam A. Damati 《International Journal of Communication Systems》2020,33(14)
In order to support the demand of the users in the new generation wireless systems (such as the smart interaction between the mobile devices and the mobile human), the resources of the intelligent transportation system should be utilized efficiently. Thus, the network structure adaptation due to the rapid changes in such communication process should be investigated. This is in addition to save the direct impact of the network resources such as high speed data transmission and data processing. Based on the standards for both of vehicular ad hoc network (VANET) and IEEE 802.11p, two main propositions have been examined to attain the improvement in such intelligent systems performance. In this paper, we improved the QoS and proposed a clustering algorithm named MP‐RC‐MBOFDM. It groups the mobile nodes based on their speeds with some modified head assignments processes. This will be combined with a parallel‐processing technique and a wavelet processing stage to optimize the transmitted power phenomenon. The simulation results of five main efficiency factors that have been involved, namely, complementary cumulative distributions, bit rates, energy efficiency, the cluster head life time, and the ordinary nodes reattaching‐head average times, show the feasibility of the new proposition in the V2V data transmission. 相似文献
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随着无线网络技术的日益成熟及其对小型、微型移动设备的支持,无线移动传感器网络已经逐渐成为一个研究的热点。主要讨论了为无线移动传感器网络设计的一个自适应的体系结构。在该体系结构中,使用了一个区域和核心路由节点相结合的多层结构的方法来增加无线移动网络的信息传输能力、可扩充性和可靠性,并降低网络的能耗,这样就可以适应无线移动网络的高度动态性和移动性。 相似文献
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This paper presents a piecewise framework for network awareness service (NAS) for wireless/mobile pervasive computing. We investigate how piecewise consideration of wired and wireless elements of the framework architecture benefits service advertisement and discovery and network-awareness techniques. We also discuss scalability of the NAS framework with respect to platform computing capabilities. The framework is suitable for a wide range of computing devices, from powerful ones with multi-tasking operating systems (OS) to small ones with lightweight OS. Case studies applying the NAS framework to sensor monitoring in home networks and data streaming in pervasive multimedia computing are presented. The analytical results on the performance of the NAS framework in these case studies show that it has significant advantages over traditional network-awareness frameworks in terms of reducing wireless bandwidth consumption and saving battery energy of mobile devices. 相似文献