<p>In order to develop and secure the functionality of its cellular communications systems, Ericsson deals with numerous R&D and I&V activities. One important aspect is interoperability with mobile terminals from different vendors on the world market. Therefore Ericsson co-operates with mobile platform and user equipment manufacturers. These companies visit the interoperability developmental testing (IoDT) laboratories in Linköping to test their developmental products and prototypes in order to certify compliance with Ericsson's products. The knowledge exchange is mutual, Ericsson as well as the user equipment manufacturers benefit from the co-operation.</p><p>The goal of this master's thesis performed at Ericsson AB is to suggest areas in which the IoDT testing can be automated in order to minimize time consuming and tedious work tasks. Primarily the search should be aimed at replacing manual tasks in use today.</p><p>The thesis suggests a number of IoDT tasks that might be subject for automation. Among these one is chosen for implementation. The thesis also includes an implementation part. The task that has been chosen for implementation is the network verification after base station controller software upgrade procedure. This is not a core IoDT function but it implies a lot of work, and is often performed.</p><p>The automation project is also supposed to act as a springboard for future automation within IoDT. The forthcoming LTE standard will require a lot of IoDT testing, and therefore the automation capabilities should be investigated. The thesis shows that automation work is possible, and that the startup process is straightforward. Existing tools are easy to use, and well supported. The network verification automated test scope has been successful.</p>

<p>The evolvement of the uplink in the third generation mobile telecommunication system is an ongoing process. The Enhanced Uplink (EUL) concept is being developed to meet the expected need from more advanced services, like video streaming and mobile broadband. One idea for further improvement in the EUL concept is to introduce Time Division Multiple Access (TDMA), which is studied in this master thesis.</p><p>The master thesis assignment is to study the consequences of introducing TDMA in EUL. The goal has been to identify the gains and problems, and how they can be handled. A derived theoretical framework and system simulations, using a radio network simulator, are used.</p><p>The overall conclusion is that there is a potentially large gain with an introduction of TDMA in EUL. Simulations in favorable conditions have shown that the system throughput can increase by 100% when there are only User Equipment (UE) that are using EUL in the system and by 50% when there is a mix of speech and EUL UE’s. When using TDMA the uplink load also shows improvements, the mean is generally higher but the variance is generally smaller.</p><p>Due to major differences in experienced interference between passive and active UE’s, the signal quality will vary a lot. The big variation in signal quality is identified as the main problem with introducing TDMA in EUL. It is shown that this problem can generate extreme high uplink load, which have a negative impact both on the resource efficiency and the coverage.</p>

<p>In this thesis we investigate, implement and evaluate a solution for introducing the TransmissionControl Protocol (TCP) into the software of a load generator. The load generator is a simulator usedfor simulating end-user generated activities in the Universal Mobile Telecommunication System(UMTS) network. The purpose of simulating traffic on the network is in this case to verify thefunctionality and robustness of the Radio Network Controller (RNC) node within the UMTSnetwork.TCP is a protocol that provides reliable data transfer over unreliable underlying networkprotocols. It is used as the main transport protocol of the Internet, thus it is also used in the UMTSnetwork in order to provide connectivity for user equipment, such as 3G mobile phones, to servicesover the Internet. For the load generator to be able to produce more realistic traffic scenarios is itdesirable to give it the ability to use TCP.This thesis presents a solution of the problem where an open-source implementation of the TCPfunctionality was chosen, ported to the running platform of the load generator and then tested in asimulated test environment. The choice of the open source implementation of TCP was made byperforming an investigation of available options. In the investigation an open source TCP/IP stackcalled lwIP was chosen. lwIP was then ported to the running platform of the load generator bywrapping and modify the source code. The tests of the ported TCP implementation were made in asimulated test environment with focus on testing basic TCP functionality. The tests showed that theTCP implementation produced provided the basic functionality that was asked for.</p>

Gemeinsamer Workshop von Universitaetsrechenzentrum und Professur "Rechnernetze und verteilte Systeme" der Fakultaet fuer Informatik der TU Chemnitz. Workshop-Thema: Mobilitaet Technik und Anwendungsmöglichkeiten des Mobilfunkstandards der 3. Generation unter Einbeziehung von Vorgänger-, Alternativ-, sowie Nachfolgesystemen.

Vortrag zu den Themen: * mobiles Internet mit UMTS * GPS und digitale Bilder * Einstieg in die Google Maps API

Thèse de doctorat : Informatique : Evry-Val d'Essonne : 2008. / Titre provenant de l'écran-titre.

Thèse de doctorat : Informatique : Evry-Val d'Essonne : 2009. / Titre provenant de l'écran-titre.

The evolvement of the uplink in the third generation mobile telecommunication system is an ongoing process. The Enhanced Uplink (EUL) concept is being developed to meet the expected need from more advanced services, like video streaming and mobile broadband. One idea for further improvement in the EUL concept is to introduce Time Division Multiple Access (TDMA), which is studied in this master thesis. The master thesis assignment is to study the consequences of introducing TDMA in EUL. The goal has been to identify the gains and problems, and how they can be handled. A derived theoretical framework and system simulations, using a radio network simulator, are used. The overall conclusion is that there is a potentially large gain with an introduction of TDMA in EUL. Simulations in favorable conditions have shown that the system throughput can increase by 100% when there are only User Equipment (UE) that are using EUL in the system and by 50% when there is a mix of speech and EUL UE’s. When using TDMA the uplink load also shows improvements, the mean is generally higher but the variance is generally smaller. Due to major differences in experienced interference between passive and active UE’s, the signal quality will vary a lot. The big variation in signal quality is identified as the main problem with introducing TDMA in EUL. It is shown that this problem can generate extreme high uplink load, which have a negative impact both on the resource efficiency and the coverage.

Topicality of the problem. GSM mobile networks are very widely used in the world and the number of GSM users exceeds 10^9. In the last decade, the GSM/GPRS network has been very rapidly expanded in Lithuania as well. Coverage of the network has reached 99 % of territory of the country. Load of the network in largest cities reaches up to several hundred Erlangs for square kilometre. Voice traffic still generates the largest part of the network load, however mobile data traffic also grows rapidly. Radio interface between the user of mobile services and the network is not stationary. The received QoS of every user in different places is different. Even in a single cell, radio link characteristics differ in different parts of the cell. The signal level may easily vary about 10–20 dB just within several or tens of meters. Moreover, a mobile user experiences different link conditions while moving in the natural environment within or between cells. However, historically characteristics of QoS of mobile services are measured and evaluated like the ones of the fixed network using statistical methods. Statistically calculated characteristics of QoS do not include information about the received quality of mobile telecommunication services of every individual user. Conception of the received quality of services of individual users (individual QoS – iQoS) in the GSM/GPRS network has not been analysed in the world before. QoS should be measured not only at the network level, as it is... [to full text]

Topicality of the problem. GSM mobile networks are very widely used in the world and the number of GSM users exceeds 10^9. In the last decade, the GSM/GPRS network has been very rapidly expanded in Lithuania as well. Coverage of the network has reached 99 % of territory of the country. Load of the network in largest cities reaches up to several hundred Erlangs for square kilometre. Voice traffic still generates the largest part of the network load, however mobile data traffic also grows rapidly. Radio interface between the user of mobile services and the network is not stationary. The received QoS of every user in different places is different. Even in a single cell, radio link characteristics differ in different parts of the cell. The signal level may easily vary about 10–20 dB just within several or tens of meters. Moreover, a mobile user experiences different link conditions while moving in the natural environment within or between cells. However, historically characteristics of QoS of mobile services are measured and evaluated like the ones of the fixed network using statistical methods. Statistically calculated characteristics of QoS do not include information about the received quality of mobile telecommunication services of every individual user. Conception of the received quality of services of individual users (individual QoS – iQoS) in the GSM/GPRS network has not been analysed in the world before. QoS should be measured not only at the network level, as it is... [to full text]