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A Low Power System for Synchronising Buffered Air Quality Data 同步缓冲空气质量数据的低功耗系统
Pub Date : 2022-07-18 DOI: 10.1109/MN55117.2022.9887671
Ingram Weeks, Ben Holden, Aleksandar Stanoev
Air quality is becoming an increasingly recognised public health issue, with a strong focus on particulate matters (PMs) which have been shown to be a cause of respiratory problems. In addition to this carbon dioxide (CO2) concen-tration has been found to impact cognitive ability at higher levels. Bristol Research and Innovation Laboratory (BRIL), have designed, developed and deployed an Internet-of- Things (IoT) system to perform low-power, distributed monitoring of indoor environmental conditions within the Cardiff University School of Engineering building using LoRaWAN as the communication protocol. This paper discusses the significant design choices behind the platform, focusing on the compromises that were made to both minimize the power consumption and adhere with regional LoRaWAN data-rate limits; through a custom scheme of encoding timestamped, buffered sensor data. In addition to this, results from the system are presented and discussed where it is shown that the method adopted, a real-time clock (RTC) for achieving synchronization across the embedded devices, is adequate for scenarios where higher frequency readings across a range of sensors are required.
空气质量正日益成为一个公认的公共卫生问题,人们强烈关注颗粒物(pm),它已被证明是呼吸系统疾病的原因。除此之外,人们还发现,二氧化碳浓度会在较高水平上影响认知能力。布里斯托尔研究与创新实验室(BRIL)设计、开发并部署了一个物联网(IoT)系统,该系统使用LoRaWAN作为通信协议,对卡迪夫大学工程学院大楼内的室内环境条件进行低功耗、分布式监测。本文讨论了平台背后的重要设计选择,重点是为了最小化功耗和遵守区域LoRaWAN数据速率限制而做出的妥协;通过自定义方案的编码时间戳,缓冲传感器数据。除此之外,还介绍和讨论了系统的结果,其中表明所采用的方法,用于实现跨嵌入式设备同步的实时时钟(RTC),足以满足需要跨一系列传感器的更高频率读数的场景。
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引用次数: 0
Subframes Discrimination and Time Synchronization Methods in LTE-V2X System LTE-V2X系统中的子帧识别与时间同步方法
Pub Date : 2022-07-18 DOI: 10.1109/MN55117.2022.9887742
Jie Xu, A. Hu
L TE- V2X system is developed based on L TE system and their synchronization methods are similar. In this paper, the content of physical layer of L TE sidelink system is analyzed. Based on the characteristics of channels and symbols, a method to identify subframe types by symbol periodicity is proposed, which can effectively distinguish data frames from broadcast frames. On the basis of traditional L TE synchronization algorithms, two new synchronization algorithms are proposed for L TE sidelink system. One is subframe synchronization method based on cyclic prefix autocorrelation and the other is PSSS synchronization method for sidelink broadcast frames. The simulation results show that the synchronization performance of the subframe synchronization algorithm, which integrates multiple symbols' correlation results, is significantly better than that of the traditional auto-correlation algorithm. The synchronization miss detected ratio is reduced to 0% when SNR is more than 4dB, which is barely affected by frequency offset. PSSS synchronization algorithm is applied to broadcast frames and its synchronization RMSE value is only 0.1 % of the subframe synchronization algorithm, when the SNR is less than 2dB. Even under the influence of frequency offset, the miss detected ratio of this algorithm is 50% lower than that of subframe synchronization algorithm.
lte - V2X系统是在lte系统的基础上开发的,两者的同步方式相似。本文对lte副链路系统物理层的内容进行了分析。根据信道和符号的特点,提出了一种利用符号周期性识别子帧类型的方法,可以有效地区分数据帧和广播帧。在传统lte同步算法的基础上,针对lte副链路系统提出了两种新的同步算法。一种是基于循环前缀自相关的子帧同步方法,另一种是针对副链路广播帧的PSSS同步方法。仿真结果表明,融合多个符号相关结果的子帧同步算法的同步性能明显优于传统的自相关算法。当信噪比大于4dB时,同步漏检率降至0%,几乎不受频率偏移的影响。将PSSS同步算法应用于广播帧,当信噪比小于2dB时,其同步RMSE值仅为子帧同步算法的0.1%。即使在频偏的影响下,该算法的漏检率也比子帧同步算法低50%。
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引用次数: 0
Image Scaling Effects on Deep Learning Based Applications 基于深度学习应用的图像缩放效果
Pub Date : 2022-07-18 DOI: 10.1109/MN55117.2022.9887705
Irida Shallari, Vincenzo Gallo, M. Carratù, M. O’nils, C. Liguori, Mazhar Hussain
The sophistication and high accuracy of Deep Neural Networks have gotten significant attention in recent years, with a wide range of applications making use of their capabilities. However, the deployment of such networks still faces limitations due to the high volume of data to be processed and the high computational requirements. In this article we focus on the effects that data volume reduction, due to image compression and scaling down the image resolution, will have on the detection accuracy for the design case of a powered wheelchair guidance system. Throughout our analysis we show that the reduction in image resolution to a factor of $16times$ in image area alongside with JPEG compression provides a detection accuracy of over 0.93 in mAP, while the additional error in the position estimation of the caregiver is less than 0.5 cm. By reducing the data volume we inherently reduce the communication energy consumption, which is reduced by more than one order of magnitude. These results prove that we can overcome the complexity of high data volume for the deployment of DNNs in resource constrained IoT applications by interlacing the effects of image compression and resolution reduction, maintaining the accuracy and reducing the node energy consumption.
近年来,深度神经网络的复杂性和高精准性引起了人们的广泛关注,并得到了广泛的应用。然而,由于需要处理的数据量大,计算需求高,这种网络的部署仍然面临局限性。在本文中,我们重点研究了由于图像压缩和图像分辨率的降低而导致的数据量减少对电动轮椅引导系统设计案例的检测精度的影响。在整个分析过程中,我们表明,将图像分辨率降低到图像面积的16倍,再加上JPEG压缩,在mAP中提供了超过0.93的检测精度,而护理人员位置估计的额外误差小于0.5厘米。通过减少数据量,我们本质上减少了通信能耗,这减少了一个数量级以上。这些结果证明,在资源受限的物联网应用中,我们可以通过交叉处理图像压缩和降低分辨率的影响,在保持精度的同时降低节点能耗,克服dnn部署的高数据量复杂性。
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引用次数: 2
An Energy-Efficient Process for Optimal Communication Synchronization in Low Power Wireless Smart Sensors 低功耗无线智能传感器中最优通信同步的节能过程
Pub Date : 2022-07-18 DOI: 10.1109/MN55117.2022.9887722
Helbert da Rocha, J. Pereira, T. Rodrigues, J. Salvado, A. Espírito-Santo
Wireless sensor connectivity is heavily constrained by the availability of power at the sensor. With the increasing use of energy harvesting mechanisms, the need to develop wireless network connection synchronisation mechanisms, generally attributed to the Medium Access Control (MAC) layer, also grows. This paper proposes a communication synchronisation method between the Network-Capable Application Processor (NCAP) and a Transducer Interface Modules (TIM), defined by the IEEE 1451, using a Time Division Multiple Access (TDMA) scheme. The time slot allocation is determined by a metaheuristic algorithm that inputs the device's energy state and returns the energy harvesting period, observing the impact of uncertainty as long-time energy harvesting periods will disturb the synchronisation of the devices to communicate. The synchronisation process uses the resources from IEEE 1451.0 standard. It allows devices with energetic restrictions, which do not use the communication protocols defined in IEEE 1451.5, to be accepted in a network of transducers compatible with the IEEE 1451 standard.
无线传感器连接严重受到传感器电源可用性的限制。随着能量收集机制的使用越来越多,开发无线网络连接同步机制的需求也在增长,通常归因于介质访问控制(MAC)层。本文提出了一种采用时分多址(TDMA)方案在具有网络功能的应用处理器(NCAP)和IEEE 1451标准定义的传感器接口模块(TIM)之间进行通信同步的方法。时隙分配由一种元启发式算法确定,该算法输入设备的能量状态并返回能量收集周期,观察不确定性的影响,因为长时间的能量收集周期将干扰设备通信的同步。同步过程使用来自IEEE 1451.0标准的资源。它允许具有能量限制的设备,不使用IEEE 1451.5中定义的通信协议,在与IEEE 1451标准兼容的传感器网络中被接受。
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引用次数: 1
Six Months in the Life of a Cellular Tower: Is 5G Exposure Higher than pre-5G One? 蜂窝塔寿命的六个月:5G的曝光率比5G之前的更高吗?
Pub Date : 2022-07-18 DOI: 10.1109/MN55117.2022.9887670
L. Chiaraviglio, Chiara Lodovisi, D. Franci, S. Pavoncello, T. Aureli
5G service is already available in many countries, including Italy. Currently, 5G networks are run in parallel to the already deployed pre-5G ones (including 4G). In this work, we face the problem of continuously monitoring the exposure from a vantage point over a very long period of time (i.e., several months). After designing and validating a measurement setup suitable for our aims, we extensively collected 5G and pre-5G exposure data from the considered location. Results show that, although the share of 5G exposure is in general lower than pre-5G one, both intensity and occurrence of 5G exposure peaks are rapidly increasing over the months, suggesting a growth of 5G exposure levels in the near future.
包括意大利在内的许多国家已经提供了5G服务。目前,5G网络与已经部署的pre-5G网络(包括4G)并行运行。在这项工作中,我们面临着在很长一段时间(即几个月)内从有利位置连续监测暴露的问题。在设计和验证了适合我们目标的测量装置后,我们从考虑的位置广泛收集了5G和预5G暴露数据。结果显示,尽管5G暴露的比例总体上低于5G前,但5G暴露峰值的强度和发生频率在几个月内都在迅速增加,表明5G暴露水平在不久的将来会增长。
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引用次数: 4
A Measurement of Real-world Attack Connections toward Honeypots 针对蜜罐的真实攻击连接的测量
Pub Date : 2022-07-18 DOI: 10.1109/MN55117.2022.9887774
Wuyan Sun, Chuyang Yuan, Wenjun Fan
Honeypot is a special security tool created for enticing attackers and studying their malicious activities. The interaction extent between the honeypot and the attacker is pre-sumably in compliance with the fidelity level (or the interaction level) of the honeypot, i.e., more information system resource the honeypot provides, longer term the attacker is sunk, and more activities the honeypot can capture. However, we found that there are few works focusing on the interaction extent/duration in terms of the attack connection. Therefore, this paper emphasizes the measurement of the time-related property, i.e., the attack connection duration in light of the honeypot's interaction-level. We deploy different interaction-level honeypots on CloudLab to observe the real-world attack connections. The data collection continues for 4 weeks. Thereafter, we apply a statistical analysis on the collected data to verify the correspondence between the attack extend and the honeypot's fidelity level. We figure out that the high-interaction honeypot (HIH) can make the attacker trap in for 6.51 seconds on average, while the low-interaction honeypot (LIH) can hold the attacker in play for just 1.61 seconds on average but can distract more attackers.
蜜罐是一种特殊的安全工具,用于引诱攻击者并研究他们的恶意活动。蜜罐与攻击者之间的交互程度大致符合蜜罐的保真度级别(或交互级别),即蜜罐提供的信息系统资源越多,攻击者沉没的时间越长,蜜罐捕获的活动越多。然而,我们发现很少有研究关注攻击连接方面的交互程度/持续时间。因此,本文强调测量与时间相关的属性,即根据蜜罐的交互级别测量攻击连接持续时间。我们在CloudLab上部署了不同的交互级蜜罐,以观察真实世界的攻击连接。数据收集持续4周。然后,对收集到的数据进行统计分析,验证攻击范围与蜜罐保真度之间的对应关系。我们发现,高交互蜜罐(HIH)平均可以让攻击者陷入6.51秒,而低交互蜜罐(LIH)平均只能让攻击者陷入1.61秒,但可以分散更多的攻击者。
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引用次数: 0
A Network of Monitoring Nodes to Analyze Dimensions of Volcanic Ash Samples 火山灰样本维度分析的监测节点网络
Pub Date : 2022-07-18 DOI: 10.1109/MN55117.2022.9887713
B. Andò, S. Baglio, S. Castorina, S. Graziani, Alberto Campisi, V. Marletta
The investigation of volcanic ash particles granulometry is mandatory in order to cope with real needs of both urban and air traffic, as well as to manage its effect to human health. The approach presented in this paper relies on a computer vision-based methodology for the automatic detection of volcanic ash granulometry through a network of sensing nodes, providing high spatial resolution information, is proposed. The system architecture is presented, along with the proposed image processing methodology aimed to extract statistics on the collected sample of volcanic ash. The system characterization is also addressed. Results obtained in terms of repeatability, experimental variability and the system accuracy are given.
为了满足城市和空中交通的实际需要,以及管理其对人类健康的影响,必须对火山灰颗粒粒度进行调查。本文提出的方法依赖于基于计算机视觉的方法,通过传感节点网络自动检测火山灰粒度,提供高空间分辨率的信息。介绍了系统架构,以及提出的图像处理方法,旨在提取收集到的火山灰样本的统计数据。还讨论了系统特性。给出了在重复性、实验变异性和系统精度方面得到的结果。
{"title":"A Network of Monitoring Nodes to Analyze Dimensions of Volcanic Ash Samples","authors":"B. Andò, S. Baglio, S. Castorina, S. Graziani, Alberto Campisi, V. Marletta","doi":"10.1109/MN55117.2022.9887713","DOIUrl":"https://doi.org/10.1109/MN55117.2022.9887713","url":null,"abstract":"The investigation of volcanic ash particles granulometry is mandatory in order to cope with real needs of both urban and air traffic, as well as to manage its effect to human health. The approach presented in this paper relies on a computer vision-based methodology for the automatic detection of volcanic ash granulometry through a network of sensing nodes, providing high spatial resolution information, is proposed. The system architecture is presented, along with the proposed image processing methodology aimed to extract statistics on the collected sample of volcanic ash. The system characterization is also addressed. Results obtained in terms of repeatability, experimental variability and the system accuracy are given.","PeriodicalId":148281,"journal":{"name":"2022 IEEE International Symposium on Measurements & Networking (M&N)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123185085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Experimental analysis of 5G pilot signals' variability in urban scenarios 5G导频信号在城市场景下的变异性实验分析
Pub Date : 2022-07-18 DOI: 10.1109/MN55117.2022.9887762
G. Betta, D. Capriglione, G. Cerro, G. Miele, M. Migliore, D. Šuka
This paper deals with radio-frequency electromag-netic field (RF -EMF) exposure from stand-alone (SA) 5G massive-MIMO radio base stations (RBSs) operating in the sub-6 GHz frequency range (FRl). In general, the basic principle for human exposure is to measure the power received from a constant radio control signal (usually called a pilot signal) and to apply a proper extrapolation factor, already defined in cases of 2G, 3G, and 4G RBSs. As for 5G NR (New Radio), the use of beamforming, flexible numerologies, and Time Division Duplexing (TD D) schemes require the adoption of new protocols and procedures for Maximum Power Extrapolation (MPE) techniques. Considering that SS/PBCH (Synchronization Signal/Physical Broadcast Channel) block is the only “lways-on” signal in 5G NR, several proposals use it as a reference in Extrapolation Techniques (ETs). Therefore, it is important to analyze its variability in the case of measurements on the field for analysing its stability and quantifying if it could affect the accuracy of the achieved results (thus making unreliable the comparison against applicable limits). In this framework, this paper reports the experimental analyses based on the use of a vectorial network scanner for collecting the Synchronization Signal Reference Signal Received Power (SS- RSRP) of the Sec-ondary Synchronization Signal (SSS) in the Broadcast Channel (PBCH) of the SS/PBCH block over several days for several mobile operators. The measurement campaign showed different behaviours among the operators and also proved how, in many cases, the variability ranges of SS- RSRP significantly exceed the typical measurement uncertainty.
本文讨论了运行在sub-6 GHz频率范围(FRl)的独立(SA) 5G大规模mimo无线电基站(RBSs)的射频电磁场(RF -EMF)暴露。一般来说,人体暴露的基本原理是测量从恒定无线电控制信号(通常称为导频信号)接收的功率,并应用适当的外推因子,该因子已在2G、3G和4G rbs的情况下定义。至于5G NR(新无线电),使用波束成形、灵活数字和时分双工(TD D)方案需要采用最大功率外推(MPE)技术的新协议和程序。考虑到SS/PBCH(同步信号/物理广播信道)块是5G NR中唯一的“永远在线”信号,一些建议将其作为外推技术(ETs)的参考。因此,在实地测量的情况下,重要的是分析其可变性,以分析其稳定性和量化它是否会影响所取得结果的准确性(从而使与适用限值的比较不可靠)。在此框架下,本文报告了基于使用矢量网络扫描器收集同步信号参考信号接收功率(SS- RSRP)的同步信号参考信号接收功率(SS- RSRP)在几个移动运营商的广播信道(PBCH)的SS/PBCH块数天的实验分析。测量活动显示了操作员之间的不同行为,也证明了在许多情况下,SS- RSRP的变异性范围显着超过了典型的测量不确定度。
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引用次数: 4
IEEE 1451: Communication among smart sensors using MQTT protocol IEEE 1451:使用MQTT协议的智能传感器间通信
Pub Date : 2022-07-18 DOI: 10.1109/MN55117.2022.9887708
M. Carratù, Vincenzo Gallo, V. Paciello
Smart sensors, transducers, and sensor networks are undergoing, in recent years, a profound transformation thanks to the spread of new communication protocols based on the Producer-Consumer paradigm rather than on the Request-Response paradigm of Server-Client architectures. In this context, the substandard IEEE 1451.1.6 has been introduced in the IEEE 1451 standard, which aims to standardize the Producer-Consumer based communication protocols, particularly MQTT. The role of this standard is fundamental for the realization of sensor networks with nodes produced by different manufacturers and integrated in a fully automatic way according to the paradigm “Plug and Play”. This work aims to verify the progress of this sub-standard by testing its reliability with the development and testing of a prototype wireless sensor network based on MQTT with low-cost hardware. The prototype will consist of a Network Capable Application Processor (NCAP) node and a Transducer Interface Module (TIM) node, while the role of MQTT Broker and Wi-Fi Access Point for the physical layer of the Wireless Sensor Network will be covered by the NCAP itself.
近年来,智能传感器、传感器和传感器网络正在经历一场深刻的变革,这要归功于基于生产者-消费者范式而不是基于服务器-客户端架构的请求-响应范式的新通信协议的传播。在这种情况下,IEEE 1451.1.6标准被引入到IEEE 1451标准中,该标准旨在标准化基于生产者-消费者的通信协议,特别是MQTT。该标准的作用是实现由不同制造商生产节点的传感器网络的基础,并根据“即插即用”范式以全自动方式集成。本工作旨在通过开发和测试基于MQTT的低成本硬件无线传感器网络原型来验证该子标准的进展,以测试其可靠性。该原型将由一个网络应用处理器(NCAP)节点和一个传感器接口模块(TIM)节点组成,而无线传感器网络物理层的MQTT Broker和Wi-Fi接入点的角色将由NCAP本身覆盖。
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引用次数: 3
On the Effect of Position Uncertainty of the UHF-RFID Reader Trajectory in SAR-based Localization via UAV UHF-RFID读写器轨迹位置不确定性对无人机sar定位的影响
Pub Date : 2022-07-18 DOI: 10.1109/MN55117.2022.9887773
G. Bandini, A. Motroni, A. Buffi, M. Marracci, B. Tellini
In the Internet-of- Things paradigm, the knowledge of item/people position becomes crucial to develop new services and applications. Autonomous vehicles, robots and drones rep-resent key enablers to implement cutting-edge solutions among with localization of items or people. In this paper, we present the adoption of an Unmanned Aerial Vehicle (UAV) equipped with a Radio Frequency Identification (RFID) system to locate passive RFID tags in outdoor scenario. In particular, we apply a synthetic-aperture-radar approach and we discuss how the position uncertainty of the reader-antenna trajectory affects the tag localization uncertainty.
在物联网范式中,物品/人员位置的知识对于开发新的服务和应用变得至关重要。自动驾驶汽车、机器人和无人机是实现物品或人员本地化的尖端解决方案的关键推动者。在本文中,我们提出了采用配备射频识别(RFID)系统的无人机(UAV)在户外场景中定位无源RFID标签。特别地,我们采用了一种合成孔径雷达方法,并讨论了阅读器-天线轨迹的位置不确定性如何影响标签定位的不确定性。
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引用次数: 4
期刊
2022 IEEE International Symposium on Measurements & Networking (M&N)
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