Abstraction of Wireless Communication by a Convergence Middleware in Conjunction with a Xml-Configuration
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07 - 10 September 2009 PROCEEDINGS 54. IWK Internationales Wissenschaftliches Kolloquium International Scientific Colloquium Information Technology and Electrical Engineering - Devices and Systems, Materials and Technologies for the Future Faculty of Electrical Engineering and Information Technology Startseite / Index: http://www.db-thueringen.de/servlets/DocumentServlet?id=14089 Impressum Herausgeber: Der Rektor der Technischen Universität llmenau Univ.-Prof. Dr. rer. nat. habil. Dr. h. c. Prof. h. c. Peter Scharff Redaktion: Referat Marketing Andrea Schneider Fakultät für Elektrotechnik und Informationstechnik Univ.-Prof. Dr.-Ing. Frank Berger Redaktionsschluss: 17. August 2009 Technische Realisierung (USB-Flash-Ausgabe): Institut für Medientechnik an der TU Ilmenau Dipl.-Ing. Christian Weigel Dipl.-Ing. Helge Drumm Technische Realisierung (Online-Ausgabe): Universitätsbibliothek Ilmenau Postfach 10 05 65 98684 Ilmenau Verlag: Verlag ISLE, Betriebsstätte des ISLE e.V. Werner-von-Siemens-Str. 16 98693 llmenau © Technische Universität llmenau (Thür.) 2009 Diese Publikationen und alle in ihr enthaltenen Beiträge und Abbildungen sind urheberrechtlich geschützt. ISBN (USB-Flash-Ausgabe): 978-3-938843-45-1 ISBN (Druckausgabe der Kurzfassungen): 978-3-938843-44-4 Startseite / Index: http://www.db-thueringen.de/servlets/DocumentServlet?id=14089 ABSTRACTION OF WIRELESS COMMUNICATION BY A CONVERGENCE MIDDLEWARE IN CONJUNCTION WITH A XML-CONFIGURATION Peter Buschkuehle Volker Schuermann Joerg F. Wollert Department of Electrical Engineering and Computer Science, Bochum University of Applied Sciences Bochum, 44801, Germany ABSTRACT not have any wear. Also the individual radio modules can be built in such a way that they can withstand the Today the meaning of wireless technologies demands. A further point is that there is no special constantly increases. That is not only of interest in the radio technology for the automation industry. consumer area, but also for office solutions or the Therefore increasingly radio technologies from other control and regulation of machines within the areas like e.g. the consumer market are used and/or automation technology. In the different fields of modified for automation. To mention here are applications the requirements varying against the technologies like e.g. Bluetooth [1], IEEE radio technologies. In the past it turns out that there is 802.15.4/ZigBee [2] or WLAN (Wireless Local Area not the one wireless technology that fulfills all Network) [3]. Technologies like these using the requirements in every situation. For this reason royalty-free 2,4 GHz ISM band. Because of this they different radio technologies in the automation have the advantage that thereby no further costs technology were established. Here for example would arise. Furthermore these technologies are WLAN, Bluetooth and IEEE 802.15.4 are to mention. applicable worldwide. Therefore the individual wireless technologies offer Meanwhile there are many standards, which are strong differences. For example the parameterization usually more or less well suitable for different tasks of the specific communication solutions, or the [4]. The application scenarios of wireless technologies topologies, in which the wireless networks are are often found in mobile environments. That results organized, are mentioned. It is obvious, that a uniform in participants moving out of range of the hotspots of interface must be created to abstract the wireless high dynamic networks. In addition the start-up and technologies, that a commercial long run success is maintenance of networks are often a not trivial task, guaranteed. which is still made more difficult by vanishing or joining participants. It suggests itself that this Index Terms - XML, ZigBee, Bluetooth, nanoNet, procedure is to automate and to arrange for the user WLan, middleware, convergence, configuration transparency as far as possible. Cable-bound automation systems likewise have multiplicity at communication technologies, which differs more or less strongly. 1. INTRODUCTION All these Problems should be solved in the DANA- Project (Dynamic Ad-hoc networks in automation) [5] In automation cable-bound systems dominate sensor at the Bochum University of Applied Sciences. This and actor networks. But wired networks represent a article presents a solution. In chapter 2 the state of the weak point, because the industrial environment can be art is figured out. Chapter 3 will present a raw. The wires have a high wear, because they are convergence middleware and chapter 4 describes a pretty often subject to physical or chemical demands. configuration tool. These two chapters represent the In addition cable-bound system can be very solution of the problems addressed above. Chapter 5 expensive. Because of these cases radio technologies will examine the solution critically. The last chapter become more and more accepted in automation. They gives a conclusion. use the air as transmitting medium, which logical does © 2009 - 54th Internationales Wissenschaftliches Kolloquium 2. STATE OF THE ART because FDCML offers a structure, to let appear a group of devices as unit. This chapter has its focus on automation. More precisely the state of the art of radio technologies in 2.2. Wireless in automation automation and device description languages will be Radio technologies are often used in office described. environments or private domains. For this reason the automation industry wants to use wireless 2.1. Device description languages communication and participate from the advantages. Device description languages exist since automation Meanwhile there are numerous of different radio devices are available. They serve among other things technologies, which transmit usually in the same ISM the description of network and communication band, but they differ hardly in their technology and its characteristics, containing information of the level of maturity. The two technologies, which are equipment assembly, for the diagnosis and some probably most developed are Bluetooth and WLan more. Software tools use device descriptions for the (Wireless Local area network). But the requirements automatic production of the configuration, as well as in automation are so different that more and more the adjustment of specific characteristics of the field radio technologies come to existence. To mention at devices. However there are no solutions, which this point are among others IEEE 802.15.4/ZigBee, describe complete networks. From the historical nanoNet and RFID. development different languages for different use The general requirements at radio technologies in cases [6] resulted. Apart from text-based description the automatic control engineering are now represented languages such as EDDL [7], also several XML briefly [10]: dialects are developed [8]. In the ISO 15745 [9] some - The Quality of connection can vary strongly device description languages are described and by different influences. So monitoring standardized. The ISO 15745 has the title „Industrial mechanisms are essential. automation systems and integration - Open systems - If it should come to connection interruptions application integration framework“ and consists of the and one or more devices are not connected following parts: any longer, a mechanism is necessary that - Part 1: Generic reference description the connection repairs. - Part 2: Reference description for ISO - Security mechanisms like authentication or 11898-based control systems encryption are extremely important, because - Part 3: Reference description for IEC radio is an open medium. 61158-based control systems All these technologies have different function - Part 4: Reference description for Ethernet- modes, which bring pro and cons with itself and cope based control systems with different application scenarios. Often Consumer The fundamental mechanisms of a device technologies are special modified. To mention here description language obtain part 1, while in the other for example are IWLAN (Industrial Wireless Local parts; the fieldbus specific device description Area Network) of the company Siemens und WISA languages are described. In this article a special focus (Wireless Interface for Sensors and Actors) of the lies on XML based device description languages. For company ABB. this reason the article only goes on detail on ISO WLAN is often used for a radio-based extension of 14745-3. the existing cable-bound networks, because it has the FDCML (Field Device Configuration Markup highest affinity for such networks of all the radio Language) offers the possibility to describe the device technologies. In addition also a high range and high in its details. A device is not completely out-modeled, data rates are characteristics of WLAN. but only the structures for representation of certain Bluetooth should bridge short ranges and is used types of devices are defined, because XML generally among other things to parameterize or configure defines only the structure of a document. It is an machines by the use of mobiles. Notice, that the advantage that the devices without knowledge of transmission rates are moderate and only a small automation and communication system can be number of participants can be realized. described. Rather information about identification, ZigBee is a relative new technology, which has communication, functionality, diagnostic information very small energy consumption. The data rate is rather and mechanical details should be given. Beside the small. ZigBee is suitable for networking