Made available in DSpace on 2014-12-17T14:08:45Z (GMT). No. of bitstreams: 1 JeffersonDF_DISSERT.pdf: 1592605 bytes, checksum: aa61d131dd2eadfff386030e41f5bd71 (MD5) Previous issue date: 2010-11-22 / The Wireless Sensor Networks (WSN) methods applied to the lifting of oil present as an area with growing demand technical and scientific in view of the optimizations that can be carried forward with existing processes. This dissertation has as main objective to present the development of embedded systems dedicated to a wireless sensor network based on IEEE 802.15.4, which applies the ZigBee protocol, between sensors, actuators and the PLC (Programmable Logic Controller), aiming to solve the present problems in the deployment and maintenance of the physical communication of current elevation oil units based on the method Plunger-Lift. Embedded systems developed for this application will be responsible for acquiring information from sensors and control actuators of the devices present at the well, and also, using the Modbus protocol to make this network becomes transparent to the PLC responsible for controlling the production and delivery information for supervisory SISAL / As Redes de Sensores Sem Fio (RSSF) aplicadas aos m?todos de eleva??o de petr?leo se apresentam como uma ?rea com crescente demanda t?cnico-cient?fica tendo em vista as otimiza??es que podem ser realizadas frente aos processos existentes. Este trabalho tem como principal objetivo apresentar o desenvolvimento de sistemas embarcados dedicados a uma rede de sensores sem fio baseada no padr?o IEEE 802.15.4, onde se aplica o protocolo ZigBee, entre os sensores, atuadores e o CLP (Controlador L?gico Program?vel), visando solucionar os problemas presentes nas fases de implanta??o e manuten??o da comunica??o f?sica atual das unidades de eleva??o de petr?leo baseadas no m?todo Plunger-Lift. Os sistemas embarcados desenvolvidos para essa aplica??o ser?o respons?veis por interpretar as informa??es dos sensores e comandar os atuadores dos dispositivos presentes no po?o, como tamb?m utilizar o protocolo Modbus para fazer com que essa rede se torne transparente para o CLP respons?vel pelo controle da produ??o e envio das informa??es para o supervis?rio SISAL

Ces travaux de thèse s'inscrivent dans la thématique des objets connectés, désormais connue sous le nom de Internet of Things (IoT). Elle trouve son origine dans la démocratisation d'Internet depuis le début des années 2000 et la migration vers des appareils hautement mobiles, rendue possible grâce à la miniaturisation des systèmes embarqués. Dans ce contexte, l'efficacité énergétique est primordiale puisque les projections actuelles parlent de dizaines de milliards de composants connectés à l'horizon 2020. Or pour une question de facilité de déploiement et d'usage, une grande partie des échanges de données dans ces réseaux s'effectue via une liaison sans-fil dont l'implémentation représente une part importante de la consommation. Effectivement, la question de l'efficacité énergétique est en général considérée comme un problème de perfectionnement des architectures matérielles, souvent associé à une évolution favorable de la technologie. Toutefois, ce paradigme atteint rapidement ses limites puisqu'il implique nécessairement un dimensionnement fortement contraint pour être compatible avec les pires conditions d'utilisation, même si elles ne sont pas effectives la plupart du temps. C'est typiquement le cas avec les communications sans-fil puisque le canal radio est un milieu caractérisé par une forte variabilité en raison des phénomènes de propagation et de la présence d'interférences. Notre étude a donc porté sur la conception d'une chaîne de transmission dont le budget de liaison peut être dynamiquement modifié en fonction de l'atténuation réelle du signal, afin de réduire la consommation du système. La thèse a notamment contribué à la mise au point d'un récepteur auto-adaptatif spécifique à la norme IEEE 802.15.4, en proposant à la fois une architecture de modem numérique reconfigurable et à la fois une méthode de contrôle automatique du point de fonctionnement. Plus précisément, le travail s'est appuyé sur deux approches, l'échantillonnage compressif et l'échantillonnage partiel, pour réduire la taille des données à traiter, diminuant ainsi l'activité interne des opérateurs arithmétiques. En contrepartie, le processus de démodulation nécessite un SNR supérieur, dégradant la sensibilité du récepteur et donc le budget de liaison. Cette solution, portée sur une technologie STMicroelectronics CMOS 65 nm LP, offre une faible empreinte matérielle vis-à-vis d'une architecture classique avec seulement 23,4 kcellules. Grâce au modèle physique du circuit qui a été développé, la consommation pour la démodulation d'un paquet est estimée à 278 uW lorsque le modem est intégralement utilisé. Elle peut toutefois être abaissée progressivement jusqu'à 119 uW, correspondant à une baisse de la sensibilité de 10 dB. Ainsi, le modem implémenté et sa boucle de contrôle permettent d'économiser en moyenne 30 % d'énergie dans un cas d'utilisation typique. / This thesis work takes part in the connected objects theme, also known as the Internet of Things (IoT). It emerges from the Internet democratization since the early 2000's and the shift to highly mobile devices, made possible by the miniaturization of embedded systems. In this context, the energy efficiency is mandatory since today's projections are around tens of billions of connected devices in 2020. However for ease of deployment and usage, a large part of the data transfers in these networks is wireless, which implementation represents a significant part of the power consumption. Indeed, the energy efficiency question is addressed in general as a fine tuning of hardware architectures, which is often associated with a favorable technology evolution. Nevertheless, this design paradigm quickly reached its limits since it necessary implies a highly constrained sizing to be compatible with the worst operating conditions, even if they are not effective most of the time. It's typically the case with wireless communications since the radio channel is a medium characterized by a strong variability due to propagations effects and interferences. Thus, our study focused on the design of a communication chain whose link budget can be dynamically tuned depending on the actual signal attenuation, in order to reduce the system power consumption. The thesis has contributed to the design of a self-adaptive receiver dedicated to IEEE 802.15.4 standard, by proposing both a reconfigurable digital baseband architecture and an automatic control method of the operating mode. More precisely, the work relied on two approaches, the compressive sampling and the partial sampling, to reduce the data's size to process, decreasing the internal activity of arithmetics operators. In return, the demodulation processing needs a higher SNR, degrading in the same time the receiver sensitivity and thus the link budget. This solution, implemented in an STMicroelectronics CMOS 65 nm LP process, offers a low hardware overhead compared to conventional architecture with only 23,4 kgates. Thanks to the circuit physical model that has been developed, the power consumption for a packet demodulation is estimated to 278 uW when the baseband is fully activated. It can however be gradually decreased down to 119 uW, corresponding to a sensitivity reduction of 10 dB. Thus, the proposed digital baseband and its control loop save 30 % of energy in average in a typical use case.

Les réseaux de capteurs suscitent un engouement croissant du fait du grand nombre d'applications mais également des défis inhérents à ce genre de réseaux. Le standard IEEE 802.15.4 a été proposé afin de standardiser les couches physique et MAC. Dans ce travail nous avons dans un premier temps proposé une variante multi-canal pour le standard 802.15.4 permettant de résoudre le problème de collisions de supertrames. Pour cela nous proposons de construire un réseau en arbre avec la particularité que chaque cellule du réseau utilise un canal différent permettant ainsi une réduction conséquente des interférences et augmente la capacité du réseau. Nous avons également introduit un nouveau mécanisme de construction de topologie, d'allocation de canal et d'ordonnancement de supertrames nécessaire au bon fonctionnement d'une telle solution. Dans un deuxième temps nous avons analysé l'impact des différents paramètres de la méthode d'accès du standard. Nous avons mis en exergue les faiblesses de la méthode d'accès dont les performances baissent drastiquement pour des réseaux trop importants. Partant de ce constat, nous avons proposé des mécanismes d'auto-adaptation pour la méthode d'accès du standard. Ces derniers permettent d'adapter dynamiquement la taille des fenêtres de contention en fonction des conditions de trafic observées sur le canal. Le calcul des valeurs optimales est exécuté par chaque coordinateur pour résoudre le problème de surdité. Ces mécanismes sont distribués et convergent rapidement même en cas de trafic en rafales. / An increasing interest has been observed in Wirless Sensor Network that can be explained by wide range of WSN applications as well as by the challenges involving the constraints of this type of networks. The IEEE 802.15.4 standard has been proposed with the objective of standardizing the physical and MAC layers. In this work, we have firstly proposed an alternative multichannel scheme for the IEEE 802.15.4 standard. It is able to solve the problem of superframe collisions based on a cluster-tree topology approach in which each cluster uses a different channel allowing the reduction of the interference and increased network capacity. We have also difined a novel mechanism for topology construction, channel allocation, and superframe scheduling. Secondly, we have analyzed the impact of different parameters on the medium access control. We have shown the weakness of the medium access method proposed in the standard. For instance, we have observed a decrease in performance when the standard is applied in large networks. Motivated by the analysis and its results we have then proposed auto-adaptive mechanisms for the medium access control. They allow to dynamically adapt the size of the contention window according to the observed traffic conditions. Each coordinator computes the optimal values to avoid deafness. The proposed mechanisms rapidly converge even in the case of bursty traffic.

L’Internet des objets (IdO) utilise l’interconnexion de milliards de petits appareils informatiques, appelés «Objets», pour fournir un accès à des services et à des informations partout dans le monde. Cependant, la suite de protocoles IP a été conçue il y a plusieurs décennies dans un but totalement différent, et les fonctionnalités de l’IoT soulignent désormais les limites de l’IP. En parallèle aux efforts d’adaptation de l’IP à l’IdO, des architectures alternatives basées sur les réseaux orientés information promettent de satisfaire nativement les applications Internet émergentes. L’une de ces architectures est appelée réseau de données nommées (NDN). Nos objectifs à travers le travail rapporté dans ce manuscrit peuvent êtrerésumés en deux aspects. Le premier objectif est de montrer que NDN est adapté à la prise en charge des systèmes IdO. Le deuxième objectif est la conception de deux solutions de communication légères pour les réseaux sans fil contraints avec NDN. / The Internet of Things (IoT) uses the interconnection of billions of small computing devices, called “Things”, to provide access to services and information all over the world. However, the IP protocol suite has been designed decades ago for a completely different purpose, and IoT features now highlight the limitations of IP. While adapting IP for the IoT might be seen as cutting corners, alternative architectures based on the Information Centric Networking (ICN) paradigm promise to natively satisfy emerging Internet applications. One of these architectures is Named Data Networking (NDN). Our objectives through the work reported in this manuscript can be summarized in two aspects. The first objective is to show that NDN is suitable to support IoT networking. The second objective is the design of two solutions for lightweight forwarding in constrained wireless networks.

Mobiles, pouvant changer d’environnements au cours du temps, et de milieu pour la transmission des données et de forme de topologie, les capteurs doivent s’adapter au contexte où ils se trouvent afin d’optimiser les mécanismes qu’ils mettent en œuvre. Dans la première partie, nous proposons un mécanisme pour adapter l’architecture d’un réseau de capteurs dynamiquement en fonction du contexte et comprenant la détection dynamique d’un changement de contexte, la détection dynamique du nouveau, l’adaptation dynamique au niveau des trois couches responsables de la gestion des liens de communication en conséquence, le tout sous contrainte de consommation d’énergie. Le travail mené dans cette première partie a d’emblée posé la question de la détection du contexte. C’est une question assez difficile car elle est mal définie. L’objet de la deuxième partie est d’aborder la reconnaissance à la volée de la technologie utilisée par les réseaux émettant du trafic concurrent au réseau de capteurs. Le mécanisme proposé, FIM, identifie la cause d’interférences à partir de modèles d’erreurs observées dans les paquets de données. La détection du contexte permet aux nœuds du réseau de capteurs d’obtenir des informations sur l’environnement. Certains nœuds doivent avoir une connaissance plus fiable de l’environnement que d’autres. Comment récupérer l’information de nœuds voisins, sélectionner ceux de qui on la récupère et ne garder que ce qui nous semble sûr et utile sont les questions qui sont abordées dans la troisième partie. Nous proposons un mécanisme qui permet de décider dynamiquement si des mécanismes de docition doivent être utilisés ou pas / Being mobile, the wireless sensors must adapt to the changing environment. Therefore, in the first part of this thesis we propose a mechanism to adapt the WSN architecture dynamically based on the detected context; this includes the dynamic detection of the topology change, the detection of the new context and consequently the dynamic adaptation of the communication layer. All of these actions are executed under constraints on energy consumption. The work done in this part poses the question of detecting the new context. This is a rather difficult question because it is unclear. The purpose of the second part is to detect on the fly the type of the competitor technology generating a traffic that interferes with the WSN. The proposed mechanism, FIM, identifies the cause of interference from errors model observed in the corrupt data packets. The context detection allows the nodes of the sensor network to obtain information about the environment. Some nodes must have more reliable information on the environment than others. How to retrieve the information? From which neighboring nodes? And what information to keep as safe and useful? Are the questions that are addressed in the third part. We propose a mechanism to dynamically decide if docition mechanisms should be used or not

As increasingly more IoT devices are being deployed simultaneously in the dense 2.4 GHz ISM band, interference could start occurring. BLE, and IEEE 802.15.4 are two protocols used in IoT devices, that both are now also capable of using IPv6 communication. Since the protocols coexist in this same frequency band, interference could become a problem. However, uncooperative coexistence between these two protocols under higher IPv6 data rates is understudied, and could be unfair. This thesis aims to study possible coexistence, and mitigate it using CCA.An experimental test setup consisting of two nodes for each protocol in close proximity was used to measure possible reliability issues and data rate decrease by logging sent connection based packets over serial, while limiting the amount of available overlapping data channels for each protocol.The results show that even though PDR is maintained, throughput can decrease. While still using all channels, BLE suffers a throughput decrease of 2.25% and IEEE 802.15.4 a decrease of only 0.34%. In the most extreme case BLE can suffer a decrease of 73.3% in throughput, while IEEE sees a mean throughput decrease of 10.9%. When enabling CCA in this extreme case, an improvement of 54.6% in throughput was observed for BLE, while IEEE 802.15.4 saw a relative loss of 3.5%. Therefore, the conclusion could be made that enabling CCA in IEEE 802.15.4 can enable more fair coexistence between the protocols. / Eftersom allt fler IoT-enheter distribueras samtidigt i det täta 2,4 GHz ISM-bandet kan störningar inträffa. BLE och IEEE 802.15.4 är två protokoll som används i IoT-enheter, som båda nu också kan använda IPv6-kommunikation. Eftersom protokoll existerar i samma frekvensband kan störningar bli ett problem. Men osammanhängande samexistens mellan dessa två protokoll under högre IPv6-datahastigheter är underskattad och kan vara orättvist. Avhandlingen syftar till att studera eventuell samexistens och mildra den med hjälp av CCA.En experimentell testinställning bestående av två noder för varje protokoll i närheten, användes för att mäta eventuella pålitlighetsproblem och minskning av datahastighet genom att logga skickade anslutningsbaserade paket över seriell, samtidigt som man begränsar mängden tillgängliga överlappande datakanaler för varje protokoll.Resultaten visar att även om PDR upprätthålls kan genomströmningen minska. Medan BLE fortfarande använder alla kanaler, har BLE en genomströmningsminskning på 2.25% och IEEE 802.15.4 en minskning med endast 0.34%. I det mest extrema fallet kan BLE drabbas av en minskning med 73.3% i genomströmning, medan IEEE ser en genomsnittlig genomströmningsminskning på 10.9%. Vid aktivering av CCA i detta extrema fall observerades en förbättring av 54.6% i genomströmning för BLE medan IEEE 802.15.4 såg en relativ förlust på 3.5%. Därför kan slutsatsen dras att en attityd till CCA i IEEE 802.15.4 kan möjliggöra en mer rättvis samexistens mellan protokollen.

The Internet of Things holds great promises for the future. In the smart cities of tomorrow, wireless connectivity of everyday objects is deemed essential in ensuring efficient and sustainable use of vital, yet limited resources such as water, electricity and food. However, radio communication at the required scale does not come easily. Bandwidth is yet another limited resource that must be used efficiently so that wireless infrastructure for different IoT applications can coexist. Keeping up with the digitalization of modern society is difficult for wireless researchers and developers. The Software-Defined Radio (SDR) is a technology that allows swift prototyping and development of wireless systems by moving traditional hardware-based radio building blocks into the software domain. For developers looking to be on the bleeding edge of wireless technology, and thus keep up with the rapid digitalization, the SDR is a must. Many SDR systems consist of a radio peripheral that handles tasks such as amplification, AD/DA-conversion and resampling that are common to all wireless communication systems. The application-specific work is done in software at the baseband or an intermediate frequency by a host PC connected to the peripheral. That may include PHY-related processing such as the use of a specific modulation scheme as well as higher-layer tasks such as switching. While this setup does provide great flexibility and ease-of-use, it is not without its drawbacks. Many communication protocols specify a so-called round-trip time and devices wishing to adhere to the protocol must be able to respond to any transmission within that time. The link between the host and the peripheral is a major cause of latency and limits the use of many software-defined radio systems to proof-of-concept implementations and early prototyping since it prevents the round-trip time from being fulfilled. Overcoming the latency in the link would allow the flexibility of SDRs to be brought into field applications.This thesis aims to offload the link between the host PC and the radio peripheral in a typical SDR system. Selected parts IEEE 802.15.4, a wireless standard designed for IoT applications, were implemented by using unused programmable logic aboard the peripheral as a co-processor in order to reduce the amount of data that gets sent on the link. Frame success rate and round-trip time measurements were made and compared to measurements from a reference design without any co-processing in the radio peripheral. The co-processing greatly reduced traffic on the link while achieving a similar frame success rate as the reference design. In terms of round-trip time, the co-processing actually caused the latency to increase. Furthermore, the measurements from the coprocessing system showed a counter-intuitive behavior where the round-trip time decreased as the rate of the generated test frames increased. This unusual behavior is most likely due to internal buffer mechanisms of the operating system on the host PC. Further investigation is required in order to bring down the response time to a level more suitable for field applications. / Sakernas Internet, The Internet of Things (IoT), utlovar stora saker inom en snar framtid. I morgondagens smarta städer är trådlös uppkoppling av vardagliga ting en viktig komponent för effektiv och hållbar användning av begränsade resurser såsom vatten, elektricitet och mat. Desvärre är radiokommunikation i den skala som krävs en tuff utmaning. Bandbredd är ytterligare en begränsad resurs som måste användas effektivt så att trådlös infrastruktur för olika IoTapplikationer kan samexistera. Att hänga med i takten för det moderna samhällets digitalisering är svårt för forskare och utvecklare inom trådlösa system. Den mjukvarudefinierade radion, Software-Defined Radio (SDR), är en teknik som möjliggör smidig utveckling av trådlösa system. Grunden i tekniken är att flytta traditionella hårdvarubaserade byggblock för radio in i mjukvarudomänen. För utvecklare som vill befinna sig i framkanten för trådlösa system, och på så vis hålla takt med den snabba digitaliseringen, är SDR ett måste. Många SDR system består av en extern radiomodul som hanterar sådant som är gemensamt för de flesta trådlösa system, exempelvis förstärkning, AD/DA-omvandling och omsampling. Applikationsspecifik funktionalitet sköts av mjukvara i basbandet eller på en mellanfrekvens där mjukvaran körs på en PC. Ett SDR-system bestående av en PC med en extern radiomodul ger användaren stor flexibilitet men det har sina brister. Många kommunikationsprotokoll anger en så kallad Round-Trip Time (RTT). Enheter som strävar efter att följa protokollet måste kunna svara på alla meddelanden inom den tiden som angetts som RTT. Länken mellan PC:n och radiomodulen är en stor bidragare till fördröjningar och begränsar användandet av SDR till konceptuella tester och tidiga prototyper efter som fördröjningarna oftar innebär ett brott mot protokollets RTT. Om problemet med fördröjningar kan undvikas skulle SDR kunna användas i fältapplikationer med all den flexibilitet som SDR innebär och därmed bli ett kraftfullt utvecklingsverktyg för forskare och utvecklare inom området.Det här arbetet avser att avlasta länken mellan PC:n och radiomodulen i ett typiskt SDR system. Utvalda delar av IEEE 802.15.4, en standard för trådlös kommunikation inom IoT, implementerades med hjälp av programmerbar logik på USRP:n så att de flesta samplingarna konsumeras innan länken. Antalet framgångsrikt mottagna ramar samt RTT mättes och jämfördes med en referensdesign där samtliga beräkningar hanteras av PC:n. Användandet av den programmerbara logiken ledde till mycket reducerade datamängder på länken utan nämnvärd förändring i antalet framgångsrikt mottagna ramar jämfört med referensdesignen. Dock, vart fördröjningarna i systemet större när den programmerbara logiken användes. Dessutom visade systemet ett oväntat beteende där fördröjningen minskade under när trycket från den trådlösa trafiken ökade. Detta märkliga beteende beror högst troligt på interna buffermekanismer i operativsystemet i PC:n. Fortsatt utredning krävs innan fördröjningarna kan reduceras till en nivå som passar för fältapplikationer.

With the coming growth in Internet of Things (IoT) applications, we can expect environ-ments with many independent networks operating in nearby locations. Wireless Sensor Networks (WSN), which have become popular during the last few years, are the main type of networks used in IoT. The IEEE 802.15.4 protocol designed for low-rate wireless personal area networks has been widely adopted for this kind of network. Together with ZigBee, this protocol is gaining increasing interest from the industry, as they are con-sidered a universal solution for low-cost, low-power, wireless connected monitoring and control devices. Internetwork interference issues in IEEE 802.15.4 networks can be a ma-jor problem because of the extensive use of wireless channels. In this thesis, an in-depth simulation study of the internetwork interferences is performed using Castalia, a widely used network simulator. We focus on the beacon collision problem, as it has been proved to be the main cause of performance degradation for coexisting networks. We carry out a prestudy of the main node simulation parameters to setup the different scenarios. Then, we evaluate how the overlap of the active periods and the location of the nodes affect the network performance. We continue with a network coexistence analysis to study the inter-action of two networks of two nodes and their performance regarding the beacon reception rate. We show that there are significantly different operation regions, depending on the network location. Following this, a probabilistic analysis is carried out in order to obtain an average beacon reception rate depending on the size of the area considered. Finally, we discuss available beacon collisions avoidance methods, taking into account the detailed simulation results. Our conclusions have theoretical and practical implications for the design of wireless sensor networks, and for the evaluation of beacon collisions avoidance schemes. / Med den kommande tillväxten i sakernas Internet (IoT) applikationer är miljöer med många oberoende nätverk som verkar på närliggande ställen väntat. Trådlösa sensornätverk (WSN), som har blivit populära under de senaste åren, är den vanligaste typen av nät som används i sakernas Internet. IEEE 802.15.4 protokollen, konstruerad för låghastighet trådlösa personlig area nätverk, har fått stor spridning för WSNs. Tillsammans med ZigBee, får de en snabb ökat intresse från industrin, eftersom de betraktas som en universallösning för låg kostnad låg energi trådlös anslutning för övervaknings- och kontrollinstrument. Internätverk interferens i IEEE 802.15.4 nätverk kan vara ett stort problem på grund av den omfattande användningen av trådlösa kanaler. I denna avhandling är en djupgående simulation studie utfört med hjälp av Castalia, ett utbrett använt nätverk simulator. Vi fokuserar på beacon kollisionsproblem, eftersom det har visat sig vara den främsta orsaken till prestandaförsämring för samexisterande nätverk. Vi utför en förstudie av den viktigaste simulation parametrarna för att bestemma de olika scenarierna. Sedan utvärderar vi hur överlappningen av de aktiva perioderna och placeringen av noderna påverkar nätverkets prestanda. Vi fortsätter med en nätverksamexistens analys för att studera interaktionen mellan två nätverk av två noder, och deras prestanda avseende beacon mottagnings kvot. Vi visar att det finns betydligt olika operationsområdena, beroende på nätverksens placering. Därefter är en sannolikhetsanalys utfört för att erhålla en genomsnittlig beacon mottagnings kvot, beroende på storleken på betraktade områden. Slutligen diskuterar vi tillgängliga metoder för att undvika beacon kollision, med hänsyn till de detaljerade simuleringsresultaten. Våra slutsatser har teoretiska och praktiska kon-sekvenser för utformningen av trådlösa sensornätverk, och för utvärderingen a metoder för att undvika beacon kollision.

ITC/USA 2008 Conference Proceedings / The Forty-Fourth Annual International Telemetering Conference and Technical Exhibition / October 27-30, 2008 / Town and Country Resort & Convention Center, San Diego, California / Adding an instrumentation / telemetry system to a test article has historically required an intrusive installation. Power, wiring, and available space typically present significant challenges. There has been a long-standing need in the test and training community for a non-intrusive, flexible and modular instrumentation and telemetry system that can be installed on an aircraft or other test article without the need for permanent modifications. In addition, as available space in aircraft weapon bays, small weapons, and unmanned vehicles becomes a premium, the miniaturization of remote sensors and telemetry units becomes critical. This paper describes the current status of the Advanced Subminiature Telemetry System (ASMT) Initial Test Capability Project. It discusses the progress to date in fielding an operational, wireless sensor system that may be installed on the aircraft skin using an Electro-Cleavable adhesive as an alternative to conventional mounting methods. The wireless sensor utilizes the Wireless Communications Standard for Wireless Personal Area Network™ (WPAN™) IEEE 802.15 Working Group standard (commonly referred to as Bluetooth) to establish communication between the sensor and controller modules. Results of aircraft ground testing for EMI compatibility with aircraft systems will be presented. It is also expected that actual flight test results will be available by the time the paper goes to publication.

ITC/USA 2007 Conference Proceedings / The Forty-Third Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2007 / Riviera Hotel & Convention Center, Las Vegas, Nevada / Adding an instrumentation / telemetry system to a test article has historically required an intrusive installation. Power, wiring, and available space typically present significant challenges. There has been a long-standing need in the test and training community for a non-intrusive, flexible and modular instrumentation and telemetry system that can be installed on an aircraft or other test article without the need for permanent modifications. In addition, as available space in aircraft weapon bays, small weapons, and unmanned vehicles becomes a premium, the miniaturization of remote sensors and telemetry units becomes critical. This paper describes the current status of the Advanced Subminiature Telemetry System (ASMT) Initial Test Capability Project. It discusses the challenges that have been overcome in developing a wireless sensor network system for use in an airborne test environment. These include wireless sensor packaging design, selection of operating frequencies, COTS wireless devices, batteries, system synchronization and data bandwidth calculations. The paper will also document the progress to date including preliminary test results.