Search results for "IKT"
showing 10 items of 980 documents
Migration of VOIP/SIP enterprise solutions towards IMS
2006
Masteroppgave i informasjons- og kommunikasjonsteknologi 2006 - Høgskolen i Agder, Grimstad Voice-over-IP solutions based on SIP and Skype are now widely spread and accepted by end-users. "Traditional Circuit Switched" voice services suffer from declining revenues, high maintenance cost, and a lack of integration with Internet applications. For an enterprise customer it is increasingly difficult to make a decision about which VoIP solution to select. For fixed and mobile operators new solutions based on IMS are on the horizon, and investment strategies for VOIP solutions are difficult. The research project will investigate VoIP/SIP solutions based on open source as a starting point, and out…
Gateway security between Bluetooth and GSM/GPRS
2002
Masteroppgave i informasjons- og kommunikasjonsteknologi 2002 - Høgskolen i Agder, Grimstad The amount of wireless technologies is getting bigger and wider. It is more and more common in everyday use for a huge amount of the people. A cellular phone is something that everyone got in addition to normal access the Internet. So, why not both at the same time. When data is transmitted over the Internet and are communicating with wireless technologies, there are several vulnerable points. There have to be secure data communication, and the security is only something that should lay behind which people do not have to think about. Unfortunately, this is not the way it is, there are different techn…
Personal firewall in mobile phone
2004
Masteroppgave i informasjons- og kommunikasjonsteknologi 2004 - Høgskolen i Agder, Grimstad The assignment described in this master thesis is given by Ericsson AS and gives an evaluation of a need for a personal firewall in mobile phone. In today’s commercial products personal firewall in mobile phone does not exist. This master thesis analyzes the role of personal firewall in different scenarios. At the beginning of the master thesis functions that already exist in personal firewall for PC were discussed in the sense of which could be useful in personal firewall for mobile phone. This master thesis also covers description of connection between personal firewall and virus in addition to wha…
Formation of secure wireless ad-hoc sensor networks
2004
Masteroppgave i informasjons- og kommunikasjonsteknologi 2004 - Høgskolen i Agder, Grimstad Looking into the wireless world today, the most of data/information is transmitted in plaintext over the ether. These sensitive data/information possibly route through several intermediate nodes to a destination. To secure the sensitive data/information, the various ad-hoc technologies like Bluetooth, WLAN and ZigBee have implemented different security mechanisms and routing protocols. But since most wireless ad-hoc networks demand battery driven devices they will have limit resources to provide feasible security. The different technologies will be outlined regarding a set case scenario. We have a pa…
WLAN-GPRS interworking
2001
Masteroppgave i informasjons- og kommunikasjonsteknologi 2001 - Høgskolen i Agder, Grimstad During the last years it has been experienced a huge growth in Internet users. Nearly each household in Norway got a computer attached to the Internet. The trend for further growth seems to be within the concept of mobile Internet, which means that the user can be attached anywhere at any time. The sales of mobile equipments like personal digital assistants (PDAs) and laptops are currently experiencing a great growth. This indicates a need for greater flexibility and mobility and gives therefore a demand for mobile Internet. The motive for this thesis was to investigate the opportunities to offer mob…
Long Distance, Low Data Rate Packet Transmission at 868 MHz: Protocol Design and Implementation
2016
Masteroppgave informasjons- og kommunikasjonsteknologi - Universitetet i Agder 2016 Data transmission over wireless networks can be achieved in various ways. Some of these technologies are feasible in many real life scenarios, but there are many consequences we have to consider in this field, such as packet loss, quality degradation of radio signal over distance incrementation, ambient noise, transmission delay and etc. For the low data rate packet transmission, to adapt and to address IoT is one of the most discussed topics nowadays, especially in terms of transmission protocol design and the implementation of that design in real life scenarios. Transmitting packets in low data rate over l…
Design of energy efficient MAC protocols in wireless sensor networks
2014
Masteroppgave i Informasjons- og kommunikasjonsteknologi IKT590 Universitetet i Agder 2014 Wireless sensor networks (WSNs) have been used in variety of applications such as in military and defense, process control industry and health monitoring applications. In WSNs, sensors are in small size with limited battery capacity and idle listening is a crucial problem which consumes more energy. Duty cycling (DC) is a technique which is used in many medium access control (MAC) protocols to reduce idle listening. In this thesis, we propose an asynchronous DC protocol, namely energy balancing asynchronous cooperative transmission medium access control (EB-ACT-MAC), which balances the remaining energ…
Multi-purpose embedded communication gateway : system design and testbed implementation
2014
Masteroppgave i Informasjons- og kommunikasjonsteknologi IKT590 Universitetet i Agder 2014 This dissertation revolves around developing a multi-purpose embedded communication gateway. The gateway is equipped with multiple communication interfaces including Ethernet, Bluetooth, WiFi, Zigbee, LTE, and it can be configured and utilized for many purposes, such as a failover of an Ethernet cable via 4G in order to maintain the network connectivity. Raspberry Pi circuit board and the operating system Raspbian are selected as the hardware and the software platforms respectively. Different communication interfaces are coordinated by the Raspberry Pi and are configured via Linux scripts according to…
Seamless Hand-over Algorithm for Wireless Enterprise Networks
2007
Masteroppgave i informasjons- og kommunikasjonsteknologi 2007 – Høgskolen i Agder, Grimstad The mass deployment of the Institute of Electrical and Electronics Engineers’ (IEEE) 802.11 based wireless local area networks (WLAN) and increased sales in hand-held devices supporting WLAN have resulted in an urgent need to support fast WLAN handovers or roaming. The reason for this problem arising now is that hand-held devices are more mobile than a laptop and their users actively use their hand-held equipment while moving. Laptop users are often called nomadic users in contrast to the real mobile users. The customarily solution is that when a connection is lost with the associated access point, o…
OpenIMS and Interoperability with Asterisk/Sip Express VOIP Enterprise Solutions
2007
Masteroppgave i informasjons- og kommunikasjonsteknologi 2007 – Høgskolen i Agder, Grimstad Nowadays, with the development of the next-generation network, IMS becomes very important, and it will play a key role in the future All-IP infrastructure. But it is still in the developing stage, and it will take time for all 3G mobile networks upgrade to 3GPP networks. Therefore, the research project will study the interoperability solutions between Open Source IMS and Open Source VoIP/SIP implementations. This project is supported by auSystems and HiA. OpenIMS (Open Source IMS) was developed by FOKUS (a Germany institution) in December 2006. It is a free IMS enterprise solution. As it is so new, t…