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Dissertations / Theses on the topic 'ZigBee Wireless'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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1

Lönn, Johan, and Jonas Olsson. "ZigBee for wireless networking." Thesis, Linköping University, Department of Science and Technology, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2885.

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The past several years have witnessed a rapid development in the wireless network area. So far wireless networking has been focused on high-speed and long range applications. However, there are many wireless monitoring and control applications for industrial and home environments which require longer battery life, lower data rates and less complexity than those from existing standards. What the market need is a globally defined standard that meets the requirement for reliability, security, low power and low cost. For such wireless applications a new standard called ZigBee has been developed by the ZigBee Alliance based upon the IEEE 802.15.4 standard.

The aim of this diploma work is to design fully functional ZigBee and IEEE 802.15.4 modules, and to evaluate an application in a sensor network.

This diploma work has resulted in two fully functional ZigBee and IEEE 802.15.4 modules, respectively. It is also shown that ZigBee sensors can be networked wirelessly. Eventually it is the authors hope that the modules will be used within ITN, and also be developed further for new applications.

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2

Zacot, Chimi I. "Shipboard wireless sensor networks utilizing Zigbee technology." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Sep%5FZacot.pdf.

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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, September 2006.
Thesis Advisor(s): Xiaoping Yang. "September 2006." Includes bibliographical references (p. 59). Also available in print.
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3

Wettergren, Andreas. "ZigBee in Industry." Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10061.

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Den här C-uppsatsens mål är att undersöka om den trådlösa tekniken ZigBee är lämplig att använda i en industriell miljö. Arbetet med uppsatsen har utförts i Trolhättan (Sverige) i företaget Binar Elektronik AB:s lokaler. Bakgrunden till detta samarbete är att Binar vill veta om ZigBee är ett lämpligt val för en av deras framtida produkter.

Uppsatsen är uppdelad i fyra delar, där den första och inledande delen översiktligt beskriver begreppet ZigBee. Den här delen innehåller även en marknadsundersökning rörande ZigBee-hårdvara. Uppsatsen fortsätter sedan med nästa del där en specialisering mot en specifik ZigBee-hårdvara tar vid. Den ZigBee-modul som valdes kallas Xbee och den blev utvald baserat på resultatet från marknadsundersökningen. Den här delen beskriver även den kod som utvecklats för att på ett effektivt sätt kommunicera med Xbee-modulen.

Uppsatsens tredje del består av ett antal praktiska tester i olika miljöer, vars mål är att påvisa vilka styrkor och svagheter som ZigBee-tekniken har i respektive miljö. Den här delen innehåller även ett räckviddstest av Xbee-modulen. Den sista och avslutande delen innehåller uppsatsens resultat och slutsatser. Dessa slutsatser visar tydlig att Xbee-modulen, och dess ZigBee-tekniken, har stor potential att uppfylla de krav som ställs på ett trådlöst system i en industriell miljö. Det måste dock noteras att denna slutsats ej bör tas ur sitt sammanhang och att den således endast är giltig för de testmiljöer som den här uppsatsen behandlat.


This Bachelor of Science thesis has the primary objective to investigate whether or not the wireless technology ZigBee is suitable for industry usage. The thesis work has been done in collaboration with Binar Elektronik AB (Trollhättan, Sweden). The background story for this collaboration is that Binar is interested in finding out if ZigBee is suitable for one of their upcoming products.

The thesis is divided into four main parts, beginning with a researching part concerning ZigBee as a concept and a market research on ZigBee hardware. The thesis continuous with a specialization towards one ZigBee hardware, the ZigBee module from MaxStream called Xbee. The Xbee module was chosen based on the result from the market research. This part also describes the code that has been developed for the Xbee module, which main purpose is to simplify communication with the module.

The next part of the thesis contains a number of different field tests that show how ZigBee communication is affected in different environments. This part also includes a range test with the Xbee module. The last part of the thesis contains the final results and conclusions, which clearly show that the ZigBee technology, and Xbee in particular, has a potential to satisfy the requirements for a wireless system in an industrial environment. This conclusion concerning the industrial usability of ZigBee should however be seen in the light of this particular thesis work, making this conclusion viable only for the field test environments.


See hompage http://www.wettergren.se/zigbee/.
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4

Dittmer, Colburn. "Analysis of Zigbee Wireless Data Communication Through Baled Hay." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/731.

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Hay that has been baled with incorrect moisture content or that has been under the influence of moisture has potential to generate heat and create a fire hazard. Traditional means of monitoring baled hay temperature in storage, by inserting a pipe probe with thermometer, are time consuming. A ZigBee wireless sensor network could be used to remotely monitor internal hay bale temperatures. Tests were conducted to determine the maximum amount of hay through which a 2.4 GHz ZigBee module could transmit data and the resulting signal strength (RSSI). Based on analysis of the data, a ZigBee transmitter with 2 mW transmitting power can transmit data through 9 ft of baled hay and a ZigBee transmitter with 50 mW transmitting power can transmit data through 18 ft of baled hay. In general, RSSI decreased significantly with each additional 3 ft of baled hay.
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5

Nawaz, Shah. "Performance Study of ZigBee-based Green House Monitoring System." Thesis, Mittuniversitetet, Avdelningen för informations- och kommunikationssystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-24963.

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Wireless Sensor Network (WSN) is an emerging multi-hop wireless network technology, and the greenhouse network monitoring system is one of the key applications of WSNs in which various parameters such as temperature, humidity, pressure and power can be monitored. Here, we aim to study the performance of a simulation-based greenhouse monitoring system. To design the greenhouse monitoring system based on WSN, we have used ZigBee-based devices (end devices, routers, coordinators, and actuators. Our proposed greenhouse monitoring network has been designed and simulated using the network simulator OPNET Modeller.The investigation is split into two; first, the aim is to find the optimal Transmit (Tx) power set out at sensor nodes and second, the focus is on studying how increasing the number of sensor nodes in the same greenhouse network will affect the overall network performance. ZigBee-based greenhouses corresponded to 4 network scenarios and are simulated using OPNET Modeller in which 22 different transmit (Tx) power (22 cases) in Scenario 1 is simulated, scenario 2, 3 and 4 estimated to 63, 126, 189 number of sensor nodes respectively. Investigating the performance of the greenhouse monitoring network performance metrics such as network load, throughput, packets sent/received and packets loss are considered to be evaluated under varied transmit (Tx) power and increasing number of sensor nodes. Out of the comprehensive studies concerning simulation results for 22 different transmit (Tx) power cases underlying the greenhouse monitoring network (Scenario1), it is found that packets sent/received and packets loss perform the best with the transmitted (Tx) power falling in a range of 0.9 mWatt to 1.0 mWatt while packet sent/received and packet loss are found to perform moderately with the transmitted (Tx) power values that lie in a range of 0.05 mWatt to 0.8 mWatt. Less than 0.05 mWatt and greater than 0.01 microWatt Tx power experience, the worst performance in terms of particularly packet dropped case. For instance, in the case of the packet dropped (not joined packet, i.e., generated at the application layer but not able to join the network due to lack of Tx power), with a Tx power of 0.01 mWatt, 384 packets dropped with a Tx power of 0.02 and 0.03 mWatt, 366 packets dropped, and with a Tx power of 0.04 and 0.05, 336 packet dropped.While increasing the number of sensor nodes, as in scenario 2, 3 and 4, dealing with sensor nodes 63, 126 and 189 correspondingly, the MAC load, MAC throughput, packet sent/received in scenario 2 are found to perform better than that of scenario 3 and scenario 4, while packet loss in scenarios 2, 3 and 4 appeared to be 15%, 12% and 83% correspondingly.
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Zografos, Alexandros. "Wireless Sensor-based Agricultural Monitoring System." Thesis, KTH, Radio Systems Laboratory (RS Lab), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-143633.

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Today energy resources are becoming scarcer and therefore more valuable. In conjunction with the population growth over last century, the need for finding new, more efficient, and sustainable methods of agricultural cultivation and food production has become more critical. To facilitate this process, we are designing, building, and evaluating a system for precision agriculture which provides farmers with useful data about the soil, the water supply, and the general condition of their fields in a user friendly, easily accessible manner. Our system aims to make cultivation and irrigation more efficient as the farmer is able to make better informed decisions and thus save time and resources. The diversity of location and climatic effects upon agricultural cultivation, along with other environmental parameters over time makes the farmer’s decision-making process more complicated and requires additional empirical knowledge. Applying wireless sensor networks for monitoring environmental parameters and combining this information with a user-customized web service may enable farmers to exploit their knowledge in an efficient way in order to extract the best results from their agricultural cultivation. The system can scale based on each farmer’s demands and the resulting ensemble of collected information may represent a valuable resource for future use, in addition to its use for real-time decision making. The design of the precision agriculture system contains a prototype solution regarding the sensor platform and a customizable service that can be utilized in different ways and by several entities.
Idag när energiresurser blir allt knappare och knappare blir de även mer värdefulla. I samband med befolkningstillväxten under förra århundradet har behovet av att hitta nya, mer effektiva och hållbara metoder inom jordbruket och livsmedelsproduktion blivit av allt större vikt. . För att underlätta denna process har vi designat, byggt och utvärderat ett system för precisionsjordbruk som ger bönder mer användbara data om jorden, vattenförsörjning och det allmänna tillståndet i sina områden på ett användarvänligt och lättillgängligt sätt. Vårt system syftar till att göra odling och bevattning effektivare då bonden kan fatta bättre underbyggda beslut och därmed spara tid och resurser. Mångfalden av läget och jordbrukets klimatpåverkan, tillsammans med andra miljöparametrar över tiden gör bondens beslutsprocess mer komplicerad än tidigare och kräver ytterligare empirisk kunskap. Att tillämpa trådlösa sensornätverk för övervakning av dessa parametrar och att presentera? denna information med en användarvänlig skräddarsydd webbtjänst kan göra det möjligt för jordbrukare att utnyttja på ett effektivt sätt nåde bästa resultaten från sitt jordbruk. Systemet kan skala utifrån varje bondes krav och den insamlade data kan utgöra en värdefull resurs för ett framtida jordbruk, utöver dess användning för dagens bondes beslut. Utformningen av systemet för precisionsjordbruk innehåller en prototyplösning avseende sensorplattformen och en anpassningsbar tjänst som kan användas på olika sätt och av flera enheter.
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Liu, Luyan. "Wireless Communication in Smart Housing." Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-37631.

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With the development of computer and information technology, information and network will be the inevitable trend of smart home which aims to offer a comfortable, efficient, and convenient home. In this thesis, the background, developments and limitations of smart home systems will be described. Wired and wireless technologies applied on the smart home network will be analyzed and a comparison of them will be made. Finally, the ZigBee technology is selected to design the wireless communication network. For the system design, the thesis describes an idea where cluster topology is chosen to design the smart home system and demonstrates the process of networking as well. Based on the Labview platform, a smart home system will be simulated to achieve the functions included in data acquisition, analysis, display and storage. More specially, I will focus on temperature monitoring and control of heating and cooling systems. Finally, an analysis of the advantages and disadvantages of the smart home system is given.
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Ochmann, Tomáš. "Senzorové moduly pro bezdrátovou síť ZigBee." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-235909.

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The aim of this thesis is to design and implement modules for wireless sensor network ZigBee. These modules could communicate together and share information about measured values. The network will be managed by coordinator of network, which will process data from sensor modules and will decide about next steps around the network.
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Liška, Radovan. "Komunikační technologi ZigBee v automatizaci budov." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218997.

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Improvement of wireless technologies is a natural consequence of the progress in the field of science and technology. Usage of wireless networks based on the ZigBee technology, which are capable of indepent operation in present form, providing detailed information about physical environment and process management, brings many advantages. On the other hand, there is a serious issue about commissioning. This Master's Thesis deals with introduction of ZigBee technology and its usage, describes issue about device commissioning and types of commissioning. The main part of the Thesis is my own proposal for solving this problem, proposing algorithm using the Bitcloud stack for Coordinator, End Device and Router and its demonstration at the application. Along with analysing the application there are described possible solutions for creating a new network, adding a new node into the existing network and changing a node. The result is a graphical application and firmware for each device. The result of succesfully associated devices in network is supported by the measurement.
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Javed, Kamran. "ZigBee suitability for Wireless Sensor Networks in Logistic Telemetry Applications." Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-254.

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There has been a quick development in the wireless network area during the last decade. Mostly

these days the focus in the wireless area is on very high speed and long range applications. This

thesis describes how ZigBee is suitable for wireless sensor networks in logistic telemetry

applications for global managing and monitoring of goods. ZigBee has been developed by the

organization named as ‘ZigBee Alliance’ as a new wireless standard for the wireless solutions

based upon the IEEE 802.15.4 Standard [2]. ZigBee is a new technology as compared to the other

wireless technologies such as Bluetooth, but it has certain characteristics such as low cost, low

power, support for mesh networking e.t.c which makes its chances to be more successful than

others.

The other aim of this thesis is to examine different issues related to ZigBee to see its fitness for

logistic telemetry applications like multi-hop routing issues, routing strategies and design

requirements. ZigBee is relatively new wireless technology, so there are great deals of promises

associated with it. In this thesis, a comparison between ZigBee and Bluetooth technologies will

also be made.

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Capalini, Richard. "Lokalizace uzlů v seznorové síti ZigBee." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2010. http://www.nusl.cz/ntk/nusl-237127.

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The master thesis is concerned with problem of localization of nodes in wireless sensor network WSN implemented by ZigBee technology. The thesis provide description of ZigBee architecture involving signal description. The method of evaluating coordinates basically do not depend on used measuring methods. The method  of fingerprinting is included in separated category based on only statistical processing of RSSI data. Determination of coordinates of mobile node always needs finding out range, signal time of arrival (ToA) or angle of arrival (AoA) in respect to anchors node given dimension magnitude. The author found out three possible solutions for range measuring and one solution for angle of arrival measuring useable in context of ZigBee wireless sensor network. Finally the author discuss possibilities and constraints of ZigBee network with used measuring type.
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Kaynar, Kerem. "Developing A Zigbee Wireless Network And Controlling It Through The Internet." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12610583/index.pdf.

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The aim of this thesis is to develop a network, whose nodes communicate with the ZigBee wireless network protocol, and control this network with a PC through the Internet. One of the nodes of this network is designed to be master node. The other nodes are slave nodes. The master node can be connected to an Ethernet connected to the Internet. A PC can communicate with the master node via a specific web application over the Internet. The communication between a web server, in which the specific web application is loaded, and the master node is performed using a specific application protocol working over TCP/IP and defined in this thesis. The master node controls the slave nodes of the wireless network formed according to the commands given by the user of a PC over the Internet. The master node contains an implementation of the ZigBee stack along with a suitable application software to communicate with the slave nodes. The master node also contains an implementation of the TCP/IP stack along with a suitable application software to communicate with a web server in which the specific web application is loaded. The slave nodes contain an implementation of the ZigBee stack along with a suitable application software to communicate with the master node. For each type of node, appropriate hardware which is compliant with the software contained by that type of node is used. Each type of node uses microcontroller-based hardware.
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Florido, Ivan Roca. "Rede de sensores sem fio em ambientes veiculares baseada no padrão Zigbee." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/3/3142/tde-19082008-171044/.

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A área automotiva cada vez mais incorpora dispositivos e sistemas eletromecânicos na comunicação. Estes dispositivos são baseados nas informações internas e externas coletadas através de sensores específicos. Esta estrutura permite, por exemplo, a automatização de sistemas de transporte em ambientes controlados, monitoramento de veículos, informações de condições de trânsito e outros. Os protocolos de comunicação são fundamentais na troca de dados entre os módulos eletrônicos e certamente, se não fosse pela aplicação desses protocolos, não teríamos a integração de boa parte dos sistemas eletrônicos atualmente disponíveis. A integração dos sistemas de comunicação automotivos através de uma rede de sensores sem fio (RSSF) baseada nas especificações do padrão IEEE 802.15.4 ZigBee, constitui uma alternativa de comunicação nos ambientes automotivos. Além disso, esta integração em ambientes automotivos diminui a quantidade de fiação nos veículos. Neste trabalho apresentamos uma rede de sensores tipo estrela para a aquisição dos dados em um ambiente automotivo, realizando medições de intensidade do sinal, qualidade do sinal, throughput, pacotes perdidos.
The automotive area is including more and more devices and electromechanical systems at communication. Those devices are based in internal and external information collected through specific sensors. This structure allows, for example, automation of transport systems at controlled environments, vehicles monitoring, information of transit conditions and other. The communication protocols are fundamentals in data exchange between electronic modules and without those protocols, couldnt be possible integrate a majority of available electronic systems. The integration of automotive communication systems through wireless sensor network (WSN) based in the specifications of the standard IEEE 802.15.4 ZigBee constitute an alternative of communication in automotive environments. Besides, this integration in automotive environments reduces the quantity of wires in the vehicles. In this work we present a WSN star topology for data acquisition in automotive environment performing measurements of signal intensity, quality of signal, throughput, and lost packages.
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Gupta, Ashish. "Empirical analysis of wireless sensor networks." Phd thesis, Institut National des Télécommunications, 2010. http://tel.archives-ouvertes.fr/tel-00589606.

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Wireless sensor networks are the collection of wireless nodes that are deployed to monitor certain phenomena of interest. Once the node takes measurements it transmits to a base station over a wireless channel. The base station collects data from all the nodes and do further analysis. To save energy, it is often useful to build clusters, and the head of each cluster communicates with the base station. Initially, we do the simulation analysis of the Zigbee networks where few nodes are more powerful than the other nodes. The results show that in the mobile heterogeneous sensor networks, due to phenomenon orphaning and high cost of route discovery and maintenance, the performance of the network degrades with respect to the homogeneous network. The core of this thesis is to empirically analyze the sensor network. Due to its resource constraints, low power wireless sensor networks face several technical challenges. Many protocols work well on simulators but do not act as we expect in the actual deployments. For example, sensors physically placed at the top of the heap experience Free Space propagation model, while the sensors which are at the bottom of the heap have sharp fading channel characteristics. In this thesis, we show that impact of asymmetric links in the wireless sensor network topology and that link quality between sensors varies consistently. We propose two ways to improve the performance of Link Quality Indicator (LQI) based algorithms in the real asymmetric link sensor networks. In the first way, network has no choice but to have some sensors which can transmit over the larger distance and become cluster heads. The number of cluster heads can be given by Matérn Hard-Core process. In the second solution, we propose HybridLQI which improves the performance of LQI based algorithm without adding any overhead on the network. Later, we apply theoretical clustering approaches in sensor network to real world. We deploy Matérn Hard Core Process and Max-Min cluster Formation heuristic on real Tmote nodes in sparse as well as highly dense networks. Empirical results show clustering process based on Matérn Hard Core Process outperforms Max-Min Cluster formation in terms of the memory requirement, ease of implementation and number of messages needed for clustering. Finally, using Absorbing Markov chain and measurements we study the performance of load balancing techniques in real sensor networks.
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Fältros, Jesper, Isak Alinger, and Bergen Axel von. "Safety risks with ZigBee smart devices : Identifying risks and countermeasures in ZigBee devices with an eavesdropping experiment." Thesis, Tekniska Högskolan, Jönköping University, JTH, Datateknik och informatik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-49630.

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With ZigBee being the world’s leading IoT protocol, users are vulnerable to attacks on the wireless communication between ZigBee devices and the information that can be gained from them. For users to protect themselves from potential attacks they need to be aware of what information can be extracted and how it can be countered. Through an eavesdropping experiment, done using three individual sensors from different vendors, various packets with potential for misuse have been identified within the area of building security. With the potential areas of misuse identified, there is also a need for countermeasures against these threats. Countermeasures were identified through a collection of literature that was summarized in order to provide a wide range of alternatives, suitable to different scenarios. The experiment was limited to the functions of the sensors used, as well as traffic using the ZigBee protocol. This study pinpoints a potential for misuse of the ZigBee traffic sent between devices and shows that the ZigBee protocol is fundamentally flawed from a security aspect. Whilst countermeasures exist, they are not applicable to every situation which is why the ZigBee protocol itself needs further development to be considered secure.
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Guilot, Jean-Michel. "In-Flight Wireless Acquisition: an Experience." International Foundation for Telemetering, 2014. http://hdl.handle.net/10150/577464.

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ITC/USA 2014 Conference Proceedings / The Fiftieth Annual International Telemetering Conference and Technical Exhibition / October 20-23, 2014 / Town and Country Resort & Convention Center, San Diego, CA
The wireless acquisition system LISA has been designed for mechanical phenomenon analysis onboard aircrafts. It has been in use for more than one year now. This paper describes the organization of this equipment and the experiences related by first users.
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Ramazanali, Hawar. "Characterization and evaluation of ZigBee modules." Thesis, Linköping University, Department of Science and Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-6508.

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This thesis work started with an extensive literature study in several areas, ZigBee, instruments and measuring methods. The knowledge was implemented in use with the ZigBee modules from the two manufacturers ITN and Chipcon along with ZigBee Software Stack. Measuring methods were developed and software in ZigBee software Stack was developed to use in the ZigBee modules for the measurements. Developing measurement methods and performing measurements was an iterative process for the different measurements. The aim was to characterize the ZigBee modules in the most important areas during the extent of this master thesis work.

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Magnani, Dario. "Implementazione di reti di sensori wireless basate sul profilo ZigBee Light Link." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5290/.

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Ekström, Martin. "Towards Predictable and Reliable Wireless Communication in Harsh Environments." Doctoral thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-16413.

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Wireless communication in industrial, scientific and medical applications have several benefits. The main benefits when using wireless technologies include ease-of-deployment, the simplicity to introduce new units into the network and mobility. However it also put higher demands on the communication, including reliability and predictability compared to wired communication. The reliability issues correlate to the radio communication and the possibility to ensure that the user data is received, and within the time frame of the system requirements. This doctoral thesis presents an empirical measurement approach to investigate and model the behaviour linked to reliability and predictability. The focus of the work presented is energy consumption, packet-error-rate and latency studies. This is performed for various radio technologies and standards in (radio?) harsh environments. The main contributions of this thesis are the measurements platforms and procedures that have been developed to meet the requirements to investigate modern radio technologies in terms of predictability and reliability. This thesis show that it is possible to predict wireless communication in radio harsh environments. However it is necessary to determine the characteristics of the environment to be able to choose a suitable radio technology. The measurement procedures presented in this thesis alongside the platform developed enable these types of investigations. In this thesis a model of the energy consumption for a Bluetooth radio in low-duty-cycle applications with point-to-multipoint communication is presented. The measurements show that distance and transmission power will not effect the energy consumption for a Bluetooth nor ZigBee module. However the packet-error-rate and number of retransmissions will affect the overall energy consumption, and these parameters can be correlated to distance and foremost the environmental characteristics. This thesis also presents two application-based solutions, a time synchronized ECG network with reliable data communication as well as a low-latency wireless I/O for a hydro plant.
Tesla
Gauss
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Prince-Pike, Arrian. "Power characterisation of a Zigbee wireless network in a real time monitoring application." Click here to access this resource online, 2009. http://hdl.handle.net/10292/800.

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Zigbee is a relatively new wireless mesh networking standard with emphasis on low cost and energy conservation. It is intended to be used in wireless monitoring and control applications such as sensors and remotely operated switches where the end devices are battery powered. Because it is a recent technology there is not sufficient understanding on how network architecture and configuration affect power consumption of the battery powered devices. This research investigates the power consumption and delivery ratio of Zigbee wireless mesh and star networks for a single sink real time monitoring system at varying traffic rates and the beacon and non beacon mode operation of its underlying standard IEEE 802.15.4 in the star network architecture. To evaluate the performance of Zigbee, the network operation was simulated using the simulation tool NS-2. NS-2 is capable of simulating the entire network operation including traffic generation and energy consumption of each node in the network. After first running the simulation it was obvious that there were problems in the configuration of the simulator as well as some unexpected behaviour. After performing several modifications to the simulator the results improved significantly. To validate the operation of the simulator and to give insight on the operation of Zigbee, a real Zigbee wireless network was constructed and the same experiments that were conducted on the simulator were repeated on the Zigbee network. The research showed that the modified simulator produced good results that were close to the experimental results. It was found that the non beacon mode of operation had the lowest power consumption and best delivery ratio at all tested traffic rates. The operation of Zigbee mesh and star networks were compared to the results for IEEE 802.15.4 star networks in non beacon mode which revealed that the extra routing traffic sent by the Zigbee networking layers does contribute significantly to the power consumption, however even with the extra routing traffic, power consumption is still so low that it the battery life of the device would be limited by the shelf life of the battery, not by the energy consumption of the device. This research has successfully achieved its objectives and identified areas for future development. The simulator model for NS-2 could be improved to further increase the accuracy of the results as well as include the Zigbee routing layers and the experimental results could be improved by a more accurate power consumption data acquisition method.
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Bengtsson, 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.

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The 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.

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22

Prakash, Praveen. "Zigbee based wireless patient monitoring networks /." 2007. http://proquest.umi.com/pqdweb?did=1421626601&sid=1&Fmt=2&clientId=10361&RQT=309&VName=PQD.

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23

Lin, Sin-You, and 林信有. "Applications of ZigBee Wireless Sensor Networks." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/74497304620056843308.

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碩士
正修科技大學
電子工程研究所
97
Digital home system has been considered as a most direct and effective way to improve the quality of human home life. There are various research institutions in this area have made great progress in the last ten years. The industry efforts in many directions of automation try to make the dream of comfortable living environment come true by the realization of home appliances can be automatic operation under specific conditions and managed by the central computer. In this thesis, we realize a wireless digital home automation by the use of ZigBee wireless network technology built digital home network. We use various functions of sensors to collect environmental information and ZigBee wireless modules as the transmission media to send information to the users. The controlled home appliances, such as lights, door locks, and electric outlets, are connected to ZigBee wireless sensor network and automatic controlled by adopted with various sensor to achieve the goal of home automation.
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Chiu, Yu-Chung, and 邱育中. "Positioning System with ZigBee Wireless Network." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/tc2fbv.

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碩士
國立虎尾科技大學
航空與電子科技研究所
101
In recent decades, technology has developed rapidly and the usage of high-tech building is also growing. Due to the structures, Global Positioning System (GPS) cannot receive signal transmission in the indoor space properly. Therefore, GPS positioning is ineffective in the indoor space. The study aims to implement an indoor positioning system which based on ZigBee wireless network. The researchers placed the reference node in the indoor space. Reference node send signals to the positioning node by ZigBee wireless signal transmission. Therefore, the researchers can calculate the distance between the reference nodes and the positioning nodes by received signal strength values. After calculating the distance of positioning node between the reference nodes and positioning node, the researchers can analyze the data and figure out the positions by Triangle Math. The current positions display on computer. With data and analysis of static and dynamic experiment, the researchers can find out the error of positioning and come out with the corrections. Indoor Positioning System with ZigBee wireless network improved the drawbacks of GPS by designing wireless, intelligent, humanization and low cost. It increases the accuracy of Positioning in buildings.
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ling, cheng kui, and 鄭桂凌. "ZigBee Information System for wireless home security." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/83278071727485255557.

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碩士
亞洲大學
資訊工程學系碩士班
95
ZigBee is one of application of wireless personal area network technology. The current protocol is IEEE 802.15.4, that is a Low-rate, Wireless Personal Area Network (LR-WPAN) structure. It has a number of specific features such us low rate, short distance, low power, structure simple, low cost, and small size. The research is to employ the advanced wireless transmission technology of ZigBee to transmit signal as well as to monitor and control the platform that whether will be activated or not. Should the events of fire alarm be trigged, carbon monoxide and fall occurs. In order to prevent the further damages in case of fire alarm, carbon monoxide and fall, ZigBee will be built as one of economic Home Safety Information System. The sensors that we adapted can be adjusted to meet the requirements of environment changes. With respect to transmit signals, we apply a current most challenge wireless technology to serve not only small group of researchers or new product seekers but all who want to know the convinence of and to acquire the wireless technology. The research in to advocate the low cast ZigBee technology. It’s ultimate goal is to reduce the cost of a ZigBee chip to one US dollar. It will no longer belong to the wealth people but to all who get used to the high price of 3C product, Therefore the ZigBee will then be easily accepted by the people who love and so does the whole world.
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Chang, Yin-Han, and 張茵涵. "Data Transmission of ZigBee Wireless Network System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/14951788905777450946.

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碩士
中華大學
電機工程學系(所)
97
Technology of wireless communication has brought lots of convenience and practicality to our modern life. This thesis has established a ZigBee wireless network data transmission system, through this system, we are able to transmit the external data information to a remote control server (receiver), then the immediate management, monitoring is able to put into use. In the aspect of hardware realization, we have adopted ZigBee development which is devised by Texas Instrument and ARM9 creator board to design the system; in the aspect of software realization, we have designed the system by adopting C program, received and managed data through Linux Server.
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Lin, Kun-Yuan, and 林昆遠. "Fall Detection be ZigBee Wireless Sensor Network." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/54096988393620000742.

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碩士
國立中央大學
電機工程研究所
96
Fall often happens to aged people and toddlers. It is a common accident during their daily lives. The purpose of our system was to effectively decrease the damage by detecting fall incidents and issuing an alerting message. Our system was based on wireless sensor network (WSN) conforming to the ZigBee protocol. We hoped that the system would inform someone as soon as possible when a fall happens. The detecting part consisted of reflective optical sensors deployed as an array on the ground. When a human body lay over the sensor array, the covered sensors would be triggered. The information would be transmitted to a coordinator of the WSN by ZigBee end devices connected to the covered sensors. The server of the WSN then received the information from the coordinator and analyzed the spatial pattern of the covered sensors to determine if a fall happened. Aimed to be used in bathrooms, we implemented the WSN fall detection system on an acrylic slab about the size of a bathroom floor area. Simulations were conducted to analyze the covered sensors’ pattern when a human body fell on the floor with different poses. Based on these data, a fall detection algorithm was developed.
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Moghe, Prajakta S. "Zigbee based wireless adjustable speed drive system." Thesis, 2016. http://hdl.handle.net/1805/10857.

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Indiana University-Purdue University Indianapolis (IUPUI)
This thesis proposes a remotely controlled motor drive system which is able to supply a regulated voltage for both DC and AC motors. The proposed system integrates two different technologies, each of which belongs to the field of wireless communications and semiconductor power electronics. The introduction highlights the literature review and technical contributions in these two electrical engineering fields. The pulse width modulated control algorithm for speed control is discussed in detail. Incorporating the zigbee wireless technology into the motor drive system, for the speed control of an AC and a DC motor, by implementing digital pulse width modulation technique is the aim of this thesis. The main characteristics of the proposed system are: 1) its universal feature since it can feed either DC or AC motor without changing the hardware, 2) remotely controlled, which allows the end-user to control the motor speed safely from a remote distance, 3) flexibility in installation of the motor drives in areas that are not easily accessible by end-users, and 4) uninterrupted speed control for distance of up to few 100 feet.
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29

Tsai, Chia-Hung, and 蔡佳宏. "Networking Issues in ZigBee Wireless Sensor Networks." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/83925947173477044638.

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博士
國立交通大學
資訊科學與工程研究所
100
ZigBee is a communication standard which is considered to be suitable for wireless sensor networks. In the ZigBee protocol stack, physical and MAC layer protocols are adopted from the IEEE 802.15.4 standard [16]. ZigBee solves interoperability issues from the physical layer to the application layer. IEEE 802.15.4 defines two different modes for medium access: beaconenabled mode and beaconless mode. ZigBee supports tree and mesh network topologies. In this dissertation, we will focus on the networking issues in ZigBee beacon-enabled, tree-based networks and beaconless mesh networks. Among the well-known ZigBee topologies, ZigBee beacon-enable cluster-tree is especially suitable for wireless sensor applications with its supporting of power-saving operation and lightweight routing. The backbone of a tree network is formed by ZigBee distributed address assignment scheme. This assignment is easy to implement, but it restricts the number of children of a device and the depth of the network. We observe that the ZigBee address assignment policy is too conservative, thus usually making the utilization of the address pool poor. Those devices that can note network addresses will be isolated from the network and become orphan nodes. The orphan problem leads to the difficulty in smoothly increasing the network coverage or device density. Therefore, we propose our first research work to addressing how to alleviate the orphan problems effectively. We propose a ZigBee-compatible address assignment through temporal duplications to alleviate orphans and scale the networks. A light-weight, address-based, tree-based routing is proposed to support one-to-one routings in address-reused environments. Simulation results verify the effectiveness of the proposed solution. In our second research work, we discuss the ZigBee orphan problems in long-thin (LT) topologies. Although our temporal duplication addressing can significantly alleviate orphans in ZigBee tree networks, its deployment is still a main concern. We further observe that many monitoring applications for WSNs have adopted a path-connected-cluster (PCC) topology, where regions to be monitored are deployed with clusters of sensor nodes. Since these clusters might be physically separated, paths of sensor nodes are used to connect them together. We call such networks PCC-WSNs. PCC-WSNs may be widely applied in real situations, such as bridgeconnected islands, street-connected buildings, and pipe-connected ponds. In this work, we show that the address assignment scheme defined by ZigBee will perform poorly in terms of address utilization. We then propose a systematical solution, which includes network formation, automatic address assignment, and light-weight routing. Simulation results verify the effectiveness of the proposed solution. In our third research topic, we address the networking issues in ZigBee mesh networks. Mesh network topologies are seen as a flexible and robust manner to provide multi-hop communication. Mesh topologies offer flexibility and robustness by facilitating path formation from any source to any destination within the network. In ZigBee, stochastic address assignment mechanism is recommended in ZigBee mesh topologies such that networks can be easily scaled up without orphan problems. However, ZigBee mesh networks can only operate in beaconless mode. Power saving is a major concern in a wireless sensor network. Hence, we are interested in linking the asynchronous power-saving protocol and the energy-efficient routing problem together in ZigBee mesh networks. A cross-layer solution is proposed. On the MAC layer, we propose to use the grid-quorum system [40] to serve as the underlying power-saving framework. On the network layer, we propose to find routing paths based on the power cost incurred by grid quorums used by nodes along a path. We show how these two layers interwork with each other to support continuous queries in an energy-efficient way. Simulation results also verify the effectiveness of the proposed solution.
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Shih, Yuan-Yao, and 施淵耀. "Mobility-Robust Tree Topologies in Zigbee Wireless Networks." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/33637285808910790783.

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碩士
臺灣大學
資訊工程學研究所
98
Zigbee, formalized by IEEE 802.15.4 standard, is a specification for wireless per- sonal area networks with low power, low cost, and low data rate. In Zigbee, the tree topology is commonly practiced to form wireless sensor networks and perform data delivery applications. In the Zigbee wireless applications, data delivery failures occur constantly due to the node movements and topology changes of networks. To tackle the topology changes, the conventional route reconstruction often involve huge re- source consumptions. In this paper, we utilize the regularity in the mobility patterns to reduce the frequency of route reconstructions and achieve the efficiency in sending data to mobile nodes. To increase the data delivery ratio, we introduce the metric of mobility-robustness in a tree topology. To counter the packet losses caused by the node mobilities, we propose the tree construction with an objective to maximize the mobility-robustness of the constructed tree. We show the NP-hardness of the problem and propose a heuristic algorithm for tree construction. The effectiveness of network topologies constructed using mobility-robustness metric is demonstrated by NS2 simulations against a real-world scenario.
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Chuang, Wei-Hung, and 莊威宏. "Zigbee-based multi-channel wireless Electromyography measurement system." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/56428141007494896225.

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碩士
國立中央大學
電機工程學系
101
In the course of stroke patient rehabilitation, electromyography (EMG) provides not only an indicator of muscle strength and endurance but also an observation on co-ordination of muscles. The purpose of this study is to develop a small-sized wireless EMG measurement system for patient’s convenience. In this study, commercial available data acquisition (NI9205) and wireless transmission (WLS9163) devices were first used for acquiring and transmitting EMG signal to test the function of the signal conditioning circuits. However, the noise interference induced by the long lead wire between the electrode and NI9205 contaminated the EMG signal. This study used Zigbee module and embedded system board to develop a better wireless electromyography measurement system with a Labview-based software tool to monitor, display and analyze the signal. The function of the software tool could be expanded with Labview. In order to verify the signal quality of sensor, intra- and inter-subject variability of EMG signals were measured on four healthy subjects (3 males and 1 female, age 23-25) with three different wireless EMG measurement systems ( i.e., Shimmer research Inc., our Zigbee-based and NI-based measurement systems) in terms of signal-to-noise ratio (SNR) and spectral fatigue index. The results show that both Zigbee-based system (22.7 1.38 dB) and Shimmer system (23.6 1.98 dB) were with similar inter-subject SNRs and variation (6% vs. 8.3%). Spectral fatigue indices of both systems also indicated obvious appearance of muscle fatigue. Before multi-channel EMG measurement, whether the signal quality of sensors is identical has been examined. The results show that sensors’ signal SNRs are all about 24 1.5dB. We then conducted the multi-channel EMG measurement on the same four healthy subjects with three different movements (i.e., shoulder flexion, abduction, and extention). By calculating Co-contraction index (CI), characteristics in different movements were identified. Finally, the EMG signals of three stroke patients were measured and analyzed. Based on the CI calculation, the EMG signals before and after rehabilitation could show muscular recovery from abnormal waveform before rehabilitation and muscular power enforced after rehabilitation. These results imply that EMG signals could be used as an index of efficacy for the rehabilitation.
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Chen, Pei-Yuan, and 陳培源. "Applied Zigbee Technology in Wireless Location Tracking system." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/08992972418079717730.

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碩士
正修科技大學
電子工程研究所
95
Nowadays due to the rapid development of wireless network technology and the great growth of the service demand, accurate location estimation has gained considerable attention.This research develops wireless sensor network by ZigBee technology. ZigBee is a Wireless Personal Area Network (WPAN) with the characteristics of low power consumption, low cost,two-way communication and sensor network capability.Global Positioning System (GPS) is a current positioning system for an open and wide area. However,GPS is not suitable for accurate indoor position locating. In this research we first establish the Received Signal Strength Indication（RSSI）database of the reference nodes and the RSSI of the mobile nodes,and then use a position allocation algorithm to compute the position estimation. We also develop a position allocation program to track object location. The developed system will be applied to personal allocation management and object location tracking system.
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LIAO, JING-SUNG, and 廖進松. "Design and Implementation of ZigBee Wireless Sensor Module." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/72221378575753064388.

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Lee, Kuang-Ting, and 李光庭. "The Application of Zigbee-based wireless communication Interface." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/24393388154268272361.

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35

林恩頡. "Fault-Tolerant Mechanism on ZigBee Wireless Sensor Networks." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/7djwxx.

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碩士
逢甲大學
資訊工程學系
104
ZigBee is an emerging open standard protocol for wireless communication networks. In that protocol, it uses IEEE 802.15.4 as its physical and media access control layer standards. Based on the two layers, the network and application layers are further developed. ZigBee is with some salient characteristics, for instance, low cost, low complexity, and low power consumption. It also supports many different network topologies, and used in a variety of applications, such as smart home, healthcare, and wireless sensor networks. However, in wireless sensor networks, since all nodes usually operate with battery power, when a node uses up its energy, the network might malfunction. Until now, there are only a few research articles discussed the fault tolerance topics concerning with the ZigBee wireless sensor networks. In this thesis, we therefore propose a fault-tolerant mechanism for ZigBee wireless sensor networks to promote the network reliability and lifetime. When a node dies, we first use the spare nodes to replace the faulty node rapidly, and thus recover the network. While, if there exist no redundant nodes, we do neighboring node migration to mitigate the number of orphan nodes, such that the network is always in action. In addition to the proposed recovery scheme, we also conduct several extensive simulations with JAVA programming. The simulation results demonstrate that our proposed scheme is superior to the native ZigBee standard and its counterparts, in terms of data deliver rate, making about 8% ~ 40% improvements.
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Kuo, Heng-Chu, and 郭恆助. "Time Synchronization for ZigBee-Based Wireless Sensor Networks." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/56023681376926643038.

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碩士
國立成功大學
資訊工程學系碩博士班
93
In wireless sensor networks (WSNs), low cost and low power consumption are the most important design issues. Generally, wireless sensor node devices don’t equip with expensive oscillator to generate precise clock sources. However, power-saving techniques need accurate time scale to make sensor node devices sleep or wake up at correct time point. Therefore, wireless sensor node devices need time synchronization to calibrate themselves clocks. Time synchronization becomes an important issue in the correct operation of WSNs. IEEE standard 802.15.4 and ZigBee (wireless) protocol are new technologies proposed especially for low cost and low power consumption WSNs. In this paper, we will discuss some off-the-shelf time synchronization techniques and utilize the new features of ZigBee protocol to propose a new time synchronization solution on ZigBee-based WSNs. Finally, we evaluate the ZigBee time synchronization accuracy and performance by implementing our solution on Microchip’s PICDEM Z 2.4 GHz Demonstration Kit.
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37

TSAI, Chia-Han, and 蔡佳翰. "Implementation of Emotion Teaser using ZigBee Wireless System." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/04401351271832047476.

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碩士
國立成功大學
電機工程學系碩博士班
95
The invention of Graphical User Interface (GUI) enables users to directly operate computers through the control of mouse, and no longer need to remember operational commands. However, users still need to learn the skills of keyboard typing and input methods first to be able to communicate with computers. Therefore, studies have proven that even GUIs are difficult to traverse and use. In order to overcome the shortage of graphical user interface, tangible user interface (TUI) had been invented. The goal of TUI is to augment the physical world by coupling digital information to everyday physical objects and environments, and also reduces the time of learning to use a system. This thesis designs and implements a new TUI wireless control system - Emotion Teaser. It adopts the concept of tangible user interface, and also uses low-power short-distance ZigBee wireless technology for data transmission. The use of ZigBee enables users no longer to be bound with wires. The system transforms humanity's feeling into digital contents for multimedia animation. Users only need to shake the Emotion Teaser device intuitionally to express their feelings, and then the system can share each other’s emotions through multimedia animation. Finally, this research studied and implemented ZigBee device profile, and also developed a practical application for a wireless home remote control. Five ZigBee development modules and output LED devices are used to verify our design. In the future, one might implement smaller ZigBee modules and/or electric relay circuits in order to control household electric appliances.
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Yung-Cheng, Chen, and 陳永成. "Zigbee wireless physiological monitor application for patient of safety." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/66753910119692768469.

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碩士
亞洲大學
資訊工程學系碩士班
96
Abstract Critically ill and postoperative cancer patients who are receiving radiotherapy may need to use the physiological monitors to observe their physiological conditions in real time. Once the monitored signal was watched through the monitor system in the console room, the background light of physiological monitors can lower the image contrast of display, which can be a practical problem for clinical staffs. In this study, we combined wireless communication and sensing technology by using the Zigbee wireless physiology monitor to improve the influence of background light coming from monitor screen. The developed wireless sensor physiological monitor was installed in a treatment room for radiotherapy. The terminal device of the wireless sensor is a SpO2 transducer, which adopts the Zigbee chip micro-controller unit to transmit transducer’s signal to a router. Then, the router pass immediately the data of SpO2 transducer to PC (personal computer) through a connection of PAN (Personal Area Network) and a non-synchronized transmitter interface (RS232) between PC and SpO2 transducer. Our results demonstrate that the use of Zigbee wireless network can clearly display patient's physiological data such as heart rate and pulse in console room. This device helps when the patient has shock in the treatment room can be rescued immediately. This action can substantially ensure patients’ safety in real time. The patient safety takes an extremely important emphasis in the present medical policy. The application of wireless physiological sensory element is able to help patients situated in radiotherapy room or the negative pressure isolation ward, and so on where are not easy to use the physiological monitors to monitor their vital sign and reinforce patient’s safety.
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Yi-ChingSu and 蘇怡青. "A ZigBee-based Wireless Real-Time ECG Monitoring System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/26619064366959487968.

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碩士
國立成功大學
資訊工程學系碩博士班
101
Electrocardiography (ECG) is often used as a surveillance subject's vital signs of a physiological signal in hospital. It is a big burden for hospital manpower if a continuous monitoring system of physiological signals is not an automated system. Our system provides a reliable automatic monitoring system, which can monitor the subjects’ ECG for a long time. The proposed system supports multiple subjects and subjects were able to join or remove the system at any time. Monitors can diagnose subjects by a convenient graphic user interface (GUI) in real-time. The GUI could detection the heart rate. When the heart rate is abnormal, the GUI will alert the monitors immediately. Physiological signals are transmitted wirelessly via IEEE 802.15.4 communication technology. In order to support multiple subjects, our system implemented a time division multiple access protocol on Z-Stack. Moreover, we adjust the transmitter and receiver’s clock by a reliable and simple time synchronization method. This method saves the cost of computing between transmitters and receiver. The proposed system was proved to achieve more than 98% received data integrity when there are subjects join and remove system rapidly. The system could achieve more than 99% received data integrity in low interferences environment and more than 94% received data integrity in high interferences environment.
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Chuang, Yung-shun, and 莊永順. "Zigbee Research and Implementation in The Wireless Sensor Network." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/93743128561063055148.

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碩士
國立臺灣科技大學
電子工程系
93
The ZigBee Alliance has ratified the ZigBee specification version 1.0 at Dec, 2004. ZigBee technology is a low data rate, low power consumption, low cost, short range wireless networking protocol targeted towards automation and remote control applications. ZigBee will operate in the unlicensed RF worldwide (2.4 GHz for global, 915MHz for for much of the Americas and the Pacific Rim and 868 MHz for Europe). The data rate is 250 kbps at 2.4 GHz, 40kbps at 915 MHz and 20kbps at 868MHz. IEEE 802.15.4 focuses on the specification of the lower two layers of the protocol (physical and data link layer). On the other hand, ZigBee Alliance aims to provide the upper layers of the protocol stack. For this paper, we major in ZigBee protocol research and implementation. Firstly we use Microchip 18F4620 microcontroller and Chipcon CC2420 RF transceiver to compose of ZigBee sensor node and to execute light control between ZigBee coordinator and device. Secondary we use Zeland ID3ETM software to design ZigBee antenna at FR4 PCB board for high performance and low cost issue .Finally we use NS-2 (Network Simulation) to emulate ZigBee network performance and best condition research
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Chen, Sheng-Fang, and 陳聖方. "Applications of Audio Data Transmission over ZigBee Wireless Networks." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/52026061585262442213.

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碩士
中原大學
機械工程研究所
97
Abstract The integration of network into daily life to construct the digital environment for living is the tendency of the day because the wireless network is becoming increasingly popular. The IEEE 802.15.4/ZigBee is one of advanced wireless networking standards for short distance transmission and its characteristics are low power consumption, low cost, simple structure, and easy to connect with each other. The ZigBee-based wireless sensor networks can be widely used for monitoring home and community security, factory automation equipment conditions, medical care, traffic conditions, temperature and humidity in agriculture, energy conditions, computer peripherals, and consumer electronics. The goal of this paper is to build the transmission technique for audio data on ZigBee wireless communication network and investigate the influence on transmission quality caused by different data size and transmission distance. The experimental results show that the transmission performance becomes worse as the increase in the amount of data size and there is a direct relationship between transmission performance and data buffer size. In other words, the transmission performance will be better with the data buffer size becomes bigger. Furthermore, the audio data can be efficiently transmitted for short distance in the absence of obstacles. The implementation of this technology in this paper will help to integrate ZigBee wireless network into multimedia access services, sensors, and controllers for applying transmission of a small amount of data and easy layout of wireless network environment for digital family. Keywords: IEEE 802.15.4, ZigBee, wireless sensor networks, digital family
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42

Ho, Yung-Chih, and 賀永智. "Indoor Location Based on ZigBee Wireless Sensor Network RSSI." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/386yg3.

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碩士
國立臺北科技大學
電子工程系研究所
105
Positioning technology has concerned and rapidly developed in recent years. Different from the Global Positioning System(GPS), Assisted Global Positioning System(AGPS) and other outdoor positioning system, etc. Although outdoor positioning technology has fully developed and widely used, as the end of positioning technology, however, the development of indoor positioning technology has relatively slow. And people spend more time indoor on work and life, thus the prospect of indoor positioning technology is also very broad. The indoor positioning technologys future will be more important with the rapid development of the Internet of Things, as technology improves every day, indoor positioning system will increasingly popularize, become indispensable in our life. ZigBee is applied for indoor positioning, because its transmission distance is 10~75 m, suitable for using more than three ZigBee network detection node to cover entire indoor space, ZigBee network can through 3 to 16 network detection node to enhance receiving signal to reach purpose of positioning, and meet environments the signal attenuation as moving object positioning. Presently, this technology is widely used in indoor factory workers positioning, can clearly show the location, and provide relevance information for use. Even can be used in factory workers security, e.g., when into the dangerous area, will send warning early. This paper presented using ZigBee network to locate positioning, ZigBee network through the technology of Received Signal Strength Indicator (RSSI). In the laboratory, use this technology Architecture to locate positioning, using four ZigBee network detection nodes to locate positioning, and present a way to improve the positioning.
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43

Lo, Lee-Yang, and 羅俐洋. "Using zigbee wireless sensor for indoor locatingin food court." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/86861737527265857915.

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碩士
中原大學
電機工程研究所
104
In this thesis, we design a new application on smart phones for food courts. This application is able to efficiently and accurately find empty seats in food courts. And we use Zigbee Wireless Network to locate user''s position, it can transport food court information to user''s smart phones. First of all, we introduce a new application for indoor locating in food courts. We build a data base to save the information for seat plan of food courts so that users can use the application to find the seat position. Second, we use Zigbee Wireless Sensor to locate user’s position by Triangulation Method. This method uses the nearest three Zigbee sensors to locate the user’s position. Based on the signal’s strength between a user and the nearest three sensors, the information will help us to locate the user’s position. Third, the database can transport the food courts information to user''s smart phones by using Zigbee wireless sensor network. Finally, we use the application to know which seat is empty that user can easily to choose their seat. Then all the information will display on the smart phones.   In this thesis, we have some contributions as follows: 1. Convenience During the rush hour, people can use the application to easily find empty seats without spending much more time on looking for empty seats. 2. Efficiency It can reduce the time to accurately find the empty seat so that people can enjoy their meat smoothly. 3. Accelerate economic growth: This application will increase the shopping efficiency. Also, it increase the rate of people’s flow and then increase the food courts revenue.
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44

Liu, Chi-Hung, and 劉記宏. "A Bidding System Based on ZigBee Wireless Sensor Network." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/13201363412041626437.

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碩士
國立中興大學
資訊科學與工程學系所
101
Internet develops rapidly in recent years. Traditional trade market transforms face-to-face transaction into electronic transaction, such as online network auction. But the online network auction which uses the wires network frame is not able to satisfy the mobile users’ needs. For instance, like the fresh vegetables, fruits or fish with the preservation time, the bidder must make sure the products are fresh before offering in the market. Using the wireless transaction will be able to help the bidder check and bid the products at the same time. Most electronic auction systems are the active RFID type. The application of the RFID, is still affected by some issues： （1）One-way data transfer. Because the RFID is no handshake protocol, it cannot check whether the packet is delivered to the destination or not nor the packet is lost during the transferring process. （2）The transfer of the RFID is based on radio waves. The signals are easily affected by metals, liquids or electromagnetic waves which results in the signals’ interference and decay. （3）The antenna of the RFID has direction limitation when transmitting and accepting the signals. Therefore, it limits the using range. This thesis uses ZigBee which is based on IEEE 802.15.4 standard. At the physical layer, through the difference between the transmission power and the reception sensitivity, we will calculate the minimum required radio wave strength to reduce the environmental interference factors. In the MAC layer, using the packet replying function mechanism will raise the reliability of the data transmission. Overall, the two standards can improve the active RFID bidding and increase the bidding efficiency.
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45

Lin, Po-Hsiung, and 林柏雄. "Localization of a Vehicle using ZigBee Wireless Sensor Technology." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/88103452458099710759.

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碩士
國立彰化師範大學
電機工程學系
99
This thesis develops methodologies and techniques for localization of a vehicle. The designed localization system includes the CC2530 ZigBee wireless sensor module for global pose initialization is presented based on the Received Signal Strength Indication (RSSI) measurements, the proposed calibration method and least square method for vehicle. In this method, not only the static position and orientation of the vehicle can be determined uniquely with respect to an inertial frame of reference, but also the dynamic pose estimates can be obtained by the ZigBee wireless sensor fusion approach. Numerous simulation and experimental results are provided to show the effectiveness and feasibility of the proposed localization system.
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46

Lin, Han-Wen, and 林瀚文. "A HYBRID ROUTING ALGORITHM OF ZIGBEE WIRELESS SENSOR NETWORK." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/22064847743925550652.

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碩士
大同大學
通訊工程研究所
97
IEEE 802.15.4 standard defines the protocol and compatible interconnection for data communication devices using low data rate, low power and low complexity, short-range radio frequency transmissions in a wireless personal area network(WPAN). Since, the standard is able to use in ZigBee wireless sensor network (WSN). ZigBee has more sensor nodes, reduced device and simpler algorithm than Ad Hoc Network, e.g. IEEE 802.11. Therefore, there are more limit in design and application. ZigBee is expected to use in electric meter, light meter sensor, temperature and humidity sensor, remote monitoring, home control, and industrial automation. It is an important subject that how to improve the transmission effect and make the application usefully in the limit situation in ZigBee research. Now WSN use the reactive routing protocol (AODV) to route the path. AODV will use the unhealthy path if the path has no error or break, and reduce the transmission effect. If WSN use the proactive routing protocol, the device must offer more power to maintain the path. In this paper we use a hybrid routing algorithm (ZRP) in Wireless sensor network. Besides improve the performance of transmission and framework, it also solve the broadcast storm question. To change the Zone parameter and the Zone range, we can replace the system to reactive, proactive or hybrid routing protocol with different necessaries. ZRP can control the reaction time, delay and cost to enhance the application and develop of ZigBee. The multicast case which is differ from the peer-to-peer transmission, use data transmission protocol to replace the data package with hint package. It avoids the huge data packages to be full of network, decrease unnecessary transmission and improve transmission effect.
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47

Liao, Keng-Yi, and 廖耿驛. "Applications and Implementations of the ZigBee Wireless Network System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/59135106360649121013.

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Abstract:
碩士
中華大學
電機工程學系(所)
96
During these years recently, the development of the wireless network is rapid. For the wireless personal area networks, the IEEE formulated a lot of standards, and the IEEE 802.15.4 is one of these standards. ZigBee Alliance formulated ZigBee specification that it built on the IEEE 802.15.4. ZigBee has many advantages, low cost, low power and the network topology. This thesis used the capability of ZigBee to design the identifier system of the parking lot and the fan system of toilet. The identifier system used MAC Address that it checked the identity and determined the gate could open or not. The fan system of the toilet used routing capability and transmitted information to control the fan switch could start or not.
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48

Chen, Hsiao-Fon, and 陳曉鋒. "Context-Aware Services Based on ZigBee Wireless Sensor Network." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/41651026665680560326.

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Abstract:
碩士
國立成功大學
電腦與通信工程研究所
95
This thesis presents the design of a context–aware service system based on wire- less sensor network and the implementation of home services for some described app- lication scenarios. The wireless sensor network employed in this design is ZigBee which consists of coordinator, sensor nodes and device nodes. Sensor nodes collect environmental information and transmit the collected information to the context aware service system through coordinators. Based on the received context information and some pre-set rules, the context aware service system infers and determines the suit- able service which might be desirable for the user. The device nodes control devices according to the commands issued from the service system. A context aware service system should have the ability to understand user’s needs. In addition to collecting user’s surrounding environment information with the assistance of the sensor devices, some context managers build the rules to provide ser- vice when tenable in ruling. However, this way of providing services is still full of uncertainty. To address this issue, we propose a prediction mechanism based on Bayesian network's theory. The prediction model divides influence condition parame- ter into two parts: providing service and not providing service. Using user feedback in the previous experience as basis of consulting, the prediction model then calculate the probability of the service desirable by user’s living in this time zone and in the envi- ronmental area to assess whether is suitable for providing service or not. The implementation in this thesis includes a basic context-aware service system, the ZigBee wireless sensor network, and three example home services, namely tempe- rature service, TV service and bedroom service. From the result of testing, it can be seen that the sensors work well and the inference obtained from the prediction mecha- nism in most cases can provide services desired by the user. The design of this context-aware service system therefore is effective.
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49

Wu, Wai-Pan, and 胡維賓. "The Transceiver ZigBee Wireless System for the Biomedical application." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/50560818280447018647.

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碩士
國立成功大學
電機工程學系碩博士班
94
The thesis of this study presents the design and implementation of the ZigBee transceiver wireless system for the biomedical application in CMOS process. Its advantages include small size, low speed data rate, low cost and low power consumption. Therefore, it’s quit suitable for the biomedical application system. In design, the bandwidth is 83.5MHz from 2.4GHz to 2.4835GHz (return loss 20dB); transmission range is 10~15m, and there are 40 channels and QPSK modulation. We have obtained the immediate frequency of the receiver which is 402MHz~405MHz. In design, we use LNA to instead of PA in the transmitter because of the maximum output power is 0dBm. Therefore, we design the circuits of the transmitter including: PA/LNA, Mixer and VCO. And receiver circuit includes: LNA, Mixer and VCO. Finally, we use the T/R Switch to combine the transmitter and receiver in TSMC 0.18μm 1P6M CMOS process. The design of the transmitter has 19.98dB gain and DC consumption is 8.28mW. The receiver has 20.9dB gain and DC consumption is 7.45mW. The isolation between transmitter and receiver both is under -28dB.
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50

Yen, Ming-Chun, and 顏銘俊. "Application of Sensor-Based ZigBee Wireless Technology in Home Security." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/80895601417838545301.

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Abstract:
碩士
中華技術學院
電子工程研究所碩士班
95
More than fifty percent of Taiwan’s households are left unmanned in the daytime. As the police are short-handed in responding effectively to the rampant thievery and burglary in Taiwan, ZigBee wireless technology provides a tangible safeguard alternative for community and home securities. In this study, 4 types of sensors, namely entrance control, infrared, smoke and vibration detections, are connected to the surveillance system through ZigBee wireless transmission technology. Once an alarm is triggered at any sensor, a local warning sound will be sent off first. The signal will be transmitted through a wireless module to the computer of the security guard and displayed as a corresponding red light on the monitor with a warning sound such that real-time, low-cost, low-power-consumption alarm feedback can be achieved to fend off crimes. Contrast to the traditional system, in which signal transmission and connection relies on physical layout of wiring, ZigBee wireless transmission is far more reliable as it is less vulnerable to intentional manipulation. The relocation of the system is also very easy and inexpensive. Remote access and monitoring is possible once the system is integrated with Ethernet. This provides a cost-effective solution of home security for those who need to work in the daytime.
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