International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / There is an increasing demand for practical and powerful navigation system to lead people from one place to another quickly and rightly. The introduction of a new embedded operating system, Windows CE, allows us to design a compact, low-cost, efficient autonomous vehicle location and navigation system. This paper discusses the advantages of Windows CE, demonstrates the possibility of building an AVLNS based on it. Then a realization scheme of hardware platform and navigation software is presented.

This thesis describes a performance measurement tool that allows a user to measure network performance using a handheld device. The measurement tool consists of a client program that runs on a Microsoft Pocket PC device and a server program that runs on a regular Microsoft Windows computer. Both programs are Windows applications implemented in C/C++ using the Microsoft Embedded Visual Tool and Microsoft Visual Studio. The use of a Pocket PC device provides mobility to users, which can save time and energy when performing experiments. The thesis describes the design of the performance measurement application, implementation issues, and tests conducted using the tool. / Master of Science

Οι ανάγκες της εποχής μας για πληροφορία και επικοινωνία ανά πάσα στιγμή και σε οποιοδήποτε μέρος έχουν οδηγήσει στην ανάπτυξη ολοένα και μικρότερων, αλλά παράλληλα και ισχυρότερων, φορητών συσκευών. Η τελευταία λέξη της τεχνολογίας αφορά υπολογιστές τσέπης (Pocket PC) σε μέγεθος κινητού τηλεφώνου, οι οποίοι φέρουν ισχυρό υπολογιστικό κύκλωμα, πολλαπλές δυνατότητες δικτύωσης/επικοινωνίας και ένα λειτουργικό σύστημα (Windows CE/Windows Mobile) που επιτρέπει την ανάπτυξη πληθώρας εφαρμογών. Ενδεικτικά αναφέρονται μερικές χρήσεις των Pocket PC ως κινητά τηλέφωνα, ως συσκευές αναπαραγωγής πολυμεσικών αρχείων (ήχου/εικόνας), ως προσωπικές ατζέντες, ως συσκευές πλοήγησης κ.ά. Στην διπλωματική εργασία θα περιγράψουμε λεπτομερώς το λειτουργικό σύστημα, τα τεχνικά χαρακτηριστικά των Pocket PC και τις δυνατότητες τους. Επίσης θα παρουσιάσουμε τα περιβάλλοντα υλοποίησης εφαρμογών για τις πλατφόρμες αυτές. Μια άλλη τεχνολογία που και αυτή έχει εισβάλλει πρόσφατα στη ζωή μας είναι το Σύστημα Εντοπισμού Θέσης (GPS - Global Positiong System). Το GPS χρησιμοποιεί δορυφόρους που βρίσκονται σε τροχιά γύρω από τη Γη για την εύρεση του στίγματος και για την ακριβή μέτρηση χρόνου. Αν και αναπτύχθηκε για στρατιωτικούς σκοπούς, πλέον χρησιμοποιείται κατά κόρον από απλούς πολίτες. Οι εφαρμογές του GPS ποικίλουν από την πλοήγηση μέσα σε μια πόλη μέχρι την ορειβασία και από το κτηματολόγιο μέχρι την ωκεανογραφία. Η τεχνολογία στις μέρες μας επιτρέπει την κατασκευή GPS δεκτών πολύ μικρού μεγέθους και με δυνατότητα επικοινωνίας με διάφορα είδη υπολογιστών, συμπεριλαμβανομένων και των Pocket PC. Με το κατάλληλο πρόγραμμα στο Pocket PC έχουμε τη μοναδική δυνατότητα να επεξεργαζόμαστε εν κινήσει τα χωρικά δεδομένα του δέκτη. Στην εργασία θα περιγράψουμε αρχικά την τεχνολογία του GPS και στην συνέχεια το πρωτόκολλο εξαγωγής δεδομένων από το GPS δέκτη. Στην τρίτη φάση της εργασίας καλούμαστε στην έμπρακτη υλοποίηση του συνδυασμού των 2 τεχνολογιών. Πιο συγκεκριμένα θα επιχειρήσουμε να υλοποιήσουμε μια Windows Mobile εφαρμογή που θα τρέχει σε ένα Pocket PC και θα χρησιμοποιεί τα δεδομένα από το GPS δέκτη, καθώς και άλλη σχετική πληροφορία, για να καταγράψει την σήμανση του οδικού δικτύου. / In our modern society the continuous need for information and communication has led to the development of even smaller, but at the same time and more powerful, mobile devices. State of the art technology introduces pocket computers (Pocket PC) with size similar to a cell-phone, including powerful processing circuits, multiple capabilities of networking and an operating system (Windows CE/Mobile) capable for developing a broad range of applications. Pocket PCs can be used as sophisticated cell-phones, multimedia reproduction devices (picture, sound and video), personal organizers, city navigators and more. In this master thesis, we will describe in detail this operating system, the technical characteristics of Pocket PCs and their capabilities. We will also present the software development kits (SDKs) available for these devices. Another achievement of technology which has invaded recently in our lives is the Global Positioning System (GPS). GPS uses satellites orbiting the earth, to find our current location on Earth and for precise time calculation. At start it had only military use, but nowadays it is used extensively by citizens for civilian purposes. The applications of GPS vary from navigating through a city to oceanography. Modern technology is able to manufacture small GPS receivers with the capability to connect to a number of devices, including Pocket PCs. With the appropriate program running on the Pocket PC, we have the unique possibility to process territorial data on the go. In our thesis we will describe the GPS system and the protocol responsible for exporting data from a GPS receiver.

The motivation for inception of this MSc. thesis which follows on from a term project of the same name was the transfer of the application for building private virtual OpenVPN networks from Windows XP operating system to Windows CE Embedded 6.0 platform. The project deals with virtual private networks in general and looks more closely at its implementation - OpenVPN. It also introduces the basic features of the Windows CE operating system. The project goes on to describe device drivers in NT-based Windows operating systems, the Windows Driver Model used, the NDIS network interface model and also the model of Windows CE drivers - the Stream Interface Model. The project continues with a~description of communication in OpenVPN application and primarily the role of TUN/TAP virtual network interfaces. This is followed by a proposal for transfer of TUN/TAP adapter drivers together with a description of limitations and necessary modifications between both platforms. As a result a TAP network device driver is implemented whose function is verified by test application that emulates the behaviour of a TUN adapter. The project concludes with an evaluation of the achieved results, the possibilities for further work on this theme and with the overall contribution of this project.

Today, the telecommunication world is focused on mobility. This is popular because since the 1990s most people have integrated their mobile phones into their life. A new factor is the rise of the voice over IP(VoIP) technology, with VoIP over Wireless LANs (WLANs) as the clear next growth area for mobile communications. The purpose of this thesis was to understand how to save power based upon changing when some operations are performed in a VoIP client. In order to do this, we decided to port minisip to an HP iPAQ 5500 Personal Digital Assistant (PDA), in order to explore some of the issues of running such a client on a PDA - due to its constraints with regard to storage, processing power, and battery power. Minisip is a SIP open source user agent running on Linux and Windows. This thesis builds upon earlier theses which showed that minisip can offer a secure communications platform with the latest functions which are desired in a mobile personal VoIP system. However, most of these earlier theses utilized desktop, laptop, or server based system, i.e., with few resources constrains. The focus of this thesis was to examine the case of a highly constrained user platform such as an iPAQ. / Dagens telekommunikationssystem fokuserar på mobilitet. Detta har blivit populärt under 90-talet då mobilitet blev naturligt integrerad i människans vardagliga liv i form av exempelvis mobiltelefoner. Voice over IP (VoIP) har blivit en stor del av dagen teknik där trådlösa system Wireless LANs (WLANs) har blivit en större del av mobilkommunikation. Målet med denna rapport är att förstå hur strömförbrukningen kan minimeras genom att utföra vissa operationer med hjälp av en VoIP-klient. För att åstadkomma detta porterade vi minisip, en SIP agent som är baserad på öppen källkod och körs på Linux och Windows, till en HP iPAQ 5500, en så kallad Personal Digital Assistant (PDA). Vi valde PDAn för att kunna utforska de begränsningar den medför i form av lagringsutrymme, processorkapacitet, och batteri. Denna rapport bygger vidare på tidigare rapporter som visar att minisip kan erbjuda en säker kommunikationsplattform med de senaste funktionerna som önskas i mobila VoIPsystem. De flesta av dessa tidigare rapporter baseras på system med få begränsningar rörande resurser såsom stationära- eller bärbara datorer samt serverbaserade system. Denna rapports fokus är att utforska detta fall i en miljö med större begränsningar på resurser som till exempel en iPAQ.

The software that operates mobile and embedded devices, the embedded operating system, has evolved to adapt from the traditional desktop environment, where processing horsepower and energy supply are abundant, to the challenging resource-starved embedded environment. The embedded environment presents the software with some difficult constraints when compared to the typical desktop environment: slower hardware, smaller memory size, and a limited battery life. Different embedded OSs tackle these constraints in different ways. We survey two of the more popular embedded OSs: Linux and Windows CE. To reveal their strengths and weaknesses, we examine and compare each of the OS’s process management and scheduler, interrupt handling, memory management, synchronization mechanisms and interprocess communication, and power management. / text

The subject of this thesis is communication process between a mobile device and a server. The work is concerned with development of application in Windows Mobile in the light of technical limitation. The thesis also deals with the development of application for universal mobile database connector which then enables transparent working with information, obtained from database placed on server, on the mobile device.

This thesis deals with the development problems and creating of the multi- purpose hardware platform, which supports operating system Linux. It is focused on the microprocessors using ARM architecture with architecture ARM7, ARM9 and ARM11. The scope of the first part of this thesis was searching the sales of available 32 bit ARM microprocessors. The second part is attended to a particular Mini2440 development kit, its animation and the subsequent development of the kernel drivers for OS Linux platform. One of this thesis details was also the development of my own expansive hardware module and a capacity keypad for a usage with Mini2440 developmental kit.