Dissertations / Theses on the topic 'Low-Power Wireless Protocols'
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Österlind, Fredrik. "Improving Low-Power Wireless Protocols with Timing-Accurate Simulation." Doctoral thesis, Uppsala universitet, Avdelningen för datorteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-159886.
Full textStohs, Nathan. "Comparative Analysis of Low-Power Wireless Protocols for Biomedical Sensor Applications." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1308203046.
Full textGonga, António. "Mobility and Multi-channel Communications in Low-power Wireless Networks." Doctoral thesis, KTH, Reglerteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-177648.
Full textDe senaste åren har forskning inom trådlös kommunikation drivits av önskemåletom att kunna ersätta nuvarande trådbundna kommunikationslänkar med trådlösa lågenergialternativ.Dock kvarstår många utmaningar, såsom instabila och sporadiskalänkar, överbelastning på grund av en ökning i antal trådlösa enheter, hur maneffektivt kan växla duty-cycling mekanismen för att förlänga nätverkens livstid,med flera. Dessa utmaningar begränsar industrin från att ta till sig och utnyttjade fördelar som trådlösa lågenergialternativ kan medföra. I den här avhandlingenföreslår, designar, implementerar och utvärderar vi protokoll och system som kanförbättra de nuvarande trådlösa lågenergialternativen. Först presenterar vi MobiSense, en systemarkitektur för energibesparande kommunikationi mikro-mobila sensorscenarier. MobiSense är en hybridarkitektur somkombinerar ett fast infrastrukturnätverk med rörliga sensornoder. Simulerings- ochexperimentella resultat visar att systemet uppnår en högre överföringskapacitet ochtillförlitlighet samtidigt som överlämnandet mellan basstationer har låg latens. I den andra delen behandlar vi hur effekterna från länkdynamiken hos protokollför lågenergikommunikation kan minskas, och försöker förena idéerna hos två motståendesynsätt: (i) flerkanalskommunikation och (ii) adaptiv routing. Vi analyserarenkanals- och flerkanalskommunikation över en-stegslänkar i termer av andelenmottagna paket kontra andelen förlorade, den maximala sporadiska förlusten avpaket, tidskorrelation för förluster och förlustkorrelation mellan olika kanaler. Resultatenindikerar att flerkanalskommunikation med kanalhoppning kraftigt minskardet sporadiska uppträdandet hos länkarna och korrelationen mellan paketförluster.För flerstegsnätverk uppvisar flerkanalskommunikation och adaptiv routingliknande tillförlitlighet i täta topologier, medan flerkanalskommunikation har bättreprestanda än adaptiv routing i glesa nätverk med sporadiska länkar. I den tredje delen studeras distribuerat informationsutbyte i närhetsbaseradenätverk. Först betraktas det slumpmässiga fallet och vi fastställer potentialen hosflerkanalig indirekt utforskning av nätverket. Vi analyserar ett trestegs protokoll,som möjliggör en snabbare utforskning av nätverket. Sedan föreslår vi en ny algoritmför att upptäcka grannarna i ett flerkanalsnätverk, som kraftigt minskarutforskningstiden i jämförelse med ett enkanalsprotokoll. Vi utökar även problemettill det deterministiska fallet och föreslår en mekanism för informationsspridningsom påskyndar utforskningstiderna för deterministiska protokoll. Utvidgningen hartvå huvudförbättringar som leder till kraftigt ökad prestanda samtidigt som degaranterar att utforskningsprocessen är deterministisk. Till sist applicerar vi koncepten rörande indirekt utforskning för att designa,implementera och evaluera ett asynkront sändare-initierat flerkanals MAC protokollför trådlös lågenergikommunikation. Protokollet kombinerar en ny mekanism försnabbt lärande av tidsschemat, vilket undviker kanalförhandling för varje paket,med sporadisk dataöverföring. Detta möjliggör ett effektivt tillhandahållande avflera konkurrerande och parallella dataflöden.
QC 20151204
Zhu, Shaoling. "Experimental Study on Low Power Wireless Sensor Network Protocols with Native IP Connectivity for BuildingA utomation." Thesis, KTH, Reglerteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175792.
Full textHadjiyiannis, George Ioannou. "A low power, low bandwidth protocol for remote wireless terminals." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/39374.
Full textIncludes bibliographical references (leaves 74-75).
by George Ioannou Hadjiyiannis.
M.S.
Sheriff, Nathirulla. "Time Synchronization In ANT Wireless Low Power Sensor Network." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Data- och elektroteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-15068.
Full textBengtsson, Niclas. "Development and Implementation of a Low Power Wireless Sensor Network." Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10295.
Full textThe wish to measure different environmental parameters, in for example office buildings, is getting more and more important in today’s society. Since the sensors should be easily deployed they need to be battery powered and communicate wireless. Furthermore the radio range must be extended because of the limited range on the free frequencies. This is where wireless sensor networks come in and extend the range by relaying the data through other nodes in the network, thereby extending the total range of the network.
The purpose of this thesis work is to develop a protocol for such a wireless sensor network, capable of delivering and relaying sensor data through the nodes of the network.
The protocol has been implemented in hardware also designed in this thesis. Tests of the network have been performed and the results have shown that the network works very well and fulfills all of the requirements. Furthermore the power consumption is only 15% of the required value. This thesis has produced a very good platform to use as a base for further development of a commercial product.
Urama, Ifeoma Helen. "Optimizing Routing Protocol for Low power and Lossy Network (RPL) Objective Function for Mobile Low-Power Wireless Networks." Thesis, Mälardalens högskola, Inbyggda system, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-33375.
Full textOkumura, Ryota. "Efficient Bi-Directional Communications for Low-Power Wireless Mesh Network." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263789.
Full text新制・課程博士
博士(情報学)
甲第23328号
情博第764号
新制||情||130(附属図書館)
京都大学大学院情報学研究科通信情報システム専攻
(主査)教授 原田 博司, 教授 守倉 正博, 教授 大木 英司
学位規則第4条第1項該当
Doctor of Informatics
Kyoto University
DFAM
Akhavan, Mohammad Reza. "Adaptive receiver-based preamble-sampling MAC protocol for low power and lossy wireless sensor networks." Thesis, King's College London (University of London), 2014. http://kclpure.kcl.ac.uk/portal/en/theses/adaptive-receiverbased-preamblesampling-mac-protocol-for-low-power-and-lossy-wireless-sensor-networks(f8973012-407d-4641-9729-7ad9f3e6a62c).html.
Full textLiendo, sanchez Andreina. "Study of adaptation mechanisms of the wireless sensor nodes to the context for ultra-low power consumption." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAT095/document.
Full textThe Internet of Things (IoT) is announced as the next big technological revolution where billions of devices will interconnect using Internet technologies and let users interact with the physical world, allowing Smart Home, Smart Cities, smart everything. Wireless Sensor Network (WSN) are crucial for turning the vision of IoT into a reality, but for this to come true, many of these devices need to be autonomous in energy. Hence, one major challenge is to provide multi-year lifetime while powered on batteries or using harvested energy. Bluetooth Low Energy (BLE) has shown higher energy efficiency and robustness than other well known WSN protocols, making it a strong candidate for implementation in IoT scenarios. Additionally, BLE is present in almost every smartphone, turning it into perfect ubiquitous remote control for smart homes, buildings or cities. Nevertheless, BLE performance improvement for typical IoT use cases, where battery lifetime should reach many years, is still necessary.In this work we evaluated BLE performance in terms of latency and energy consumption based on analytical models in order to optimize its performance and obtain its maximum level of energy efficiency without modification of the specification in a first place. For this purpose, we proposed a scenarios classification as well as modes of operation for each scenario. Energy efficiency is achieved for each mode of operation by optimizing the parameters that are assigned to the BLE nodes during the neighbor discovery phase. This optimization of the parameters was made based on an energy model extracted from the state of the art. The model, in turn, has been optimized to obtain latency and energy consumption regardless of the behavior of the nodes at different levels: application and communication. Since a node can be the central device at one level, while it can be the peripheral device at the other level at the same time, which affects the final performance of the nodes.In addition, a novel battery lifetime estimation model was presented to show the actual impact that energy consumption optimization have on nodes lifetime in a fast (in terms of simulation time) and realistic way (by taking into account empirical data). Performance results were obtained in our Matlab based simulator based on OOP paradigm, through the use of several IoT test cases. In addition, the latency model used for our investigation was experimentally validated as well as the proposed parameter optimization, showing a high accuracy.After obtaining the best performance possible of BLE without modification of the specification, we evaluated the protocol performance when implementing the concept of Wake-Up radio, which is an ultra low power receiver in charge on sensing the communication channel, waiting for a signal addressed to the node and then wake the main radio up. Thus, the main radio which consumes higher energy, can remain in sleep mode for long periods of time and switch to an active mode only for packet reception, therefore saving considerable amount of energy. We demonstrated that BLE lifetime can be significantly increased by implementing a Wake-Up radio and we propose a modification of the protocol in order to render this protocol compatible with an operating mode which includes a Wake-Up radio. For this, we studied the Wake-Up radio state of the art and evaluated BLE devices lifetime when a selected Wake-Up radio is implemented at the master side
Mauragas, Eligijus. "Bevielio jutiklių tinklo valdymo protokolas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090703_115823-49770.
Full textWireless sensors network protocol. Final Master Work of electronics engineering degree. Vilnius Gediminas Technical University. Vilnius, 2009, 63 p., 27 illustrations. 13 tables., 23 bibliographical sources, 3 appendixes. The main aim of this project is to create and explore low power, energy-efficient protocol for wireless sensors, to analyze the different protocol configurations and the impact on the sensor lifetime of different system functionality using limited energy power source. Protocol designed to meet specified technical criteria in cooperation with the "Teltonika" Inc. Wireless sensors network protocol is based on IEEE 802.15.4 standard and meets all required specifications. Main protocol advantages are: fast new sensor authentication, smart battery management solutions, flexible configuration, depending on the desired characteristics and functionality and a convenient software interface. Dynamic sleep mode time selection allows the sensors to operate for up to 2 years (and more, under certain conditions) from the limited energy (1.5 Wh) power source.
Fredriksson, Tony, and Niklas Ljungberg. "Security in low power wireless networks : Evaluating and mitigating routing attacks in a reactive, on demand ad-hoc routing protocol." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-145362.
Full textOudji, Salma. "Analyse de la robustesse et des améliorations potentielles du protocole RadioFréquences Sub-GHz KNX utilisé pour l’IoT domotique." Thesis, Limoges, 2016. http://www.theses.fr/2016LIMO0121/document.
Full textThis thesis addresses the performance of the KNX-RF protocol used for home automation applications in terms of radiofrequency robustness in a multi-protocol environment that is potentially subject to interferences. In this work, the aim is to assess the interference problems encountered by KNX-RF using simulation models that would increase its RF reliability. Thus, a first model was developed on MATLAB / Simulink and allowed to investigate the performance and limitations of this protocol at its physical layer in an interference scenario occurring inside a multiprotocol home and building automation box/gateway. These simulations were followed by field experimental tests in an indoor environment (house) to verify the results. A second model was developed to evaluate the MAC layer mechanisms of KNX-RF through the discrete event simulator OMNeT ++/Mixim. This model includes all the mechanisms of channel access and frequency agility specified by KNX-RF standard. A frame collision scenario was simulated and several improvement proposals are discussed in this manuscript. The developed models can be used to analyze and predict in advance phase the behavior of KNX-RF in a radio-constrained environment
Arn-Min, Cheng. "Clustering-Based Low Power Adaptive Wireless Sensor Network Protocol Architecture." 2005. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2106200514401100.
Full textCheng, Arn-Min, and 鄭昂旻. "Clustering-Based Low Power Adaptive Wireless Sensor Network Protocol Architecture." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/52576958928617047415.
Full text國立臺灣大學
電機工程學研究所
93
To extend the lifetime of the wireless sensor network, the technique of clustering is an effective way to achieve the power conservation, network scalability and load balance. In this paper, we propose the architecture of the wireless sensor network with multiple levels of transmission power and take advantage the concept of hierarchy and clustering to have different cluster ranges among the chosen clusterheads. A network with clusters of different ranges of the covered area can have better topology control for reducing the unnecessary interference and save large amount of energy. Moreover, it can also improve the network load balance for the condition of non-homogeneous dispersion of sensor nodes. Meanwhile, each cluster will choose the clusterhead in accordance with the moving speed, residual energy, intra-cluster communication cost and decide the minimum power of the cluster range for the clusterhead to cover the entire cluster area of which it takes charge. On the other hand, the non-clusterheads can choose its own minimum transmission power level according to the distance between itself and the clusterhead. In addition, the non-clusterheads will enter sleeping state after a period of idle time to save the unnecessarily wasted power.In addition, we also investigate the tradeoff between energy consumption and throughput for the cluster-based hierarchical model with one-hop model and multi-hop model inside a cluster. Also we provide an adaptive hand-over mechanism for the re-election of the clusterhead which can prolong the network lifetime.
Wen, Jianjun. "Enhancing Mobility in Low Power Wireless Sensor Networks." Doctoral thesis, 2018. https://tud.qucosa.de/id/qucosa%3A32057.
Full textHsu, Chao-Xiang, and 許朝翔. "A Game Theory Based Congestion Control Protocol for Low Power Wireless Personal Area Networks." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/82842083226200756848.
Full text國立清華大學
資訊工程學系
102
In wireless sensor networks (WSNs), the presence of congestion can increase the ratio of packet loss, energy inefficiency and reduction of the network throughput. Especially, this situation will be more complex in Internet of Things (IoT) environ-ments, which is composed of thousands of heterogeneous nodes. RPL is an IPv6 rout-ing protocol in low power and lossy networks standardized by IETF. However, the RPL can induce problems like frequently change parent and throughput degrade under network congestion. In this paper, we address the congestion problem between child nodes and parent nodes in RPL-enabled networks, which typically consist of low power and resource constraint devices. We use game theory strategy to design a par-ent-change procedure which decides how nodes changing their next hop node toward sink to mitigate the effect of network congestion. Comparing to the ContikiRPL im-plementation, the simulation results show that our protocol can achieve more than two times improvement in loss rate and throughput with a few average hop count increas-ing.
Zhu, Xiuming. "Adaptive wireless body medical system." 2013. http://hdl.handle.net/2152/22166.
Full texttext
Chan, Ching-Lung, and 詹京龍. "Designing an Efficient Power-Aware Routing Protocol with Low Route Discovering Overhead and Low Transmission Power Consumption in Mobile Ad hoc Wireless Network." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/99011596592985276130.
Full text逢甲大學
資訊工程所
95
In power-aware routing protocol of mobile ad-hoc networks, each node may issue more than one message of finding a desired routing path with minimum power consumption or maximum power reservation. The situation of finding a desired path may result in high power consumption in the phase of path discovering. In addition, in the past, because the bandwidth issue is seldom considered, the found path may have low bandwidth to cause much transmission time and power consumption. To solve the problem of high cost in the phrase of finding a low power consumption path, in this paper, we proposed a routing protocol design with low overhead of route discovering and low power consumption. In reducing the overhead of route discovering, instead of finding all paths to select the optimal path, we let every mobile node send out at most one message to reduce the overhead of route discovering. To make the found path reduce the power consumption in the data transmission phase, we modify the found path to have a more bandwidth than the original one by applying our proposed middle-node relay model. With the middle node relay model, two neighboring nodes can know whether there is one middle node relaying to have more power reduction than direct transmission between the original two nodes. As a result, the modified path has the characteristics of low overhead of route discovering and low power consumption of data transmitting. From the simulation results, our proposed protocol performs better than DSR, MTPR, and MMBCR by 50% to 80% in the overhead of route discovering. With regard to power consumption of data transmission, our proposed routing protocol shows 60% to 77% power reduction over AODV, DSR, MTPR and MMBCR.
Chen, Po-Jung, and 陳柏榮. "Design of a Low-Power and Low-Latency MAC Protocol with Nodes Grouping and Transmission Pipelining in Wireless Sensor Networks." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/76174556508246333086.
Full text逢甲大學
資訊工程所
95
In wireless sensor networks (WSNs), the strategies of periodical sleeping and contending for using the channel are efficient in power consumption and channel utilization. However, the situations of contention and sleep arise another power consumption problem of overhearing the controls packets and increasing transmission latency. In this paper, we propose the design of nodes grouping and transmission pipelining to improve the power consumption and transmission delay. In nodes grouping design, there are several groups in the WSNs and each sensor node is initially set to belong to one of these groups where each group has different contention time and transmission time. In contrast to the situation that all nodes hear the control packets in the contention period, nodes grouping can reduce the number of nodes that overhearing the control packets in the same time to save the power consumption. To make the communication between the nodes belonging to different groups, we let each node to have a group table that recodes the group indices of its all neighbors. With the group table in the senor node, a sender can adjust its own group number to be the group number of the receiver. As a result, two nodes belonging to different groups can communicate with other. With regard to transmission delay in the WSNs, the situation of data transmission with the multiple-hops often takes place. However, when a sender transmits the data to the receiver and the receiver cannot send the data to next receiver, the transmission delay increases. To improve the transmission delay, we propose the design of transmission pipelining that makes the group number of the nodes on the path to be continuous. Therefore, the sensor node can transmit data to the sink node pipelining. From the simulation results, when the number of groups is 2, the power consumption of transmitting a byte (mJ/byte) and the transmission delay of our proposed design perform better than SMAC by about 50%. When the number of groups is 4, although the transmission delay shows only a little better than SMAC, the power consumption of transmitting a byte of our proposed design has much better than SMAC by 75%.