The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper we present possibilities of development in the field of web browsers in interconnection with existing 3GPP architecture. We utilized one of the most discussed web browser technology nowadays WebRTC in a way so it can supplement existing and proprietary Flash based technologies. To bring the customer's quality of experience even further we interconnected this system with a Single Sign...
This article proposes a solution for two issues in current communications. Firstly, that IMS suffers from lack of clients. Secondly, that mobile operators want to give the subscriber a possibility to access their VoIP network and efficiently cover special, densely populated areas like airports. To address these problems, we have developed a novel service architecture, which allows 2G subscribers access...
IPsec and TLS based VPN technologies are widely used in nowadays networks. But one can hardly find information about their performance, especially compared to each other. So when there was a speed and delay sensitive interconnection project, a direct performance comparison had to be performed. This article realizes a performance comparison of Open VPN and IPSec based VPN; we measure what throughput...
IMS as promising NGN architecture has to deal also with service availability because of its importance to customers. Its service-oriented architecture enables easy deployment of our proposed Service Sharing System (SSS) which enhances availability of offered services and brings their categorization and browsing. While usual approach of operators is to build own networks and services, SSS allows operators...
This article focuses on the network traffic measurement inside of IMS, its analysis, evaluation of its statistical properties and proposing a model of IMS traffic. We chose KaTaLyzer as a network traffic measurement software and propose network traffic models for modelling traffic in IMS.
During the last decade, considerable effort was made in the area of ad-hoc networks at various levels of reference model OSI. In this paper DSR and DYMO routing protocols are investigated in two building environments (factory and office) with and without parasitical communication. Main comparison is realized based on the average time of packet delivery and the packet loss rate. We show that DYMO works...
This article focuses on the interconnection border control function (IBCF) entity in the current IP multimedia subsystem (IMS) architecture. Based on the analysis of various types of IMS interconnection scenarios, we describe our proof-of concept solution. We evaluate the signaling in several interconnected IMS domains using open sip express router (OpenSER) based prototype of IBCF.
This article presents our framework intended for measurement of the Ethernet traffic, its evaluation and finally graphical representation. Whole project consists of three main parts network measurement, trace analysis and user interface.
Presented paper concerns with HSDPA (high speed packet data access) concept, especially describes HARQ (hybrid ARQ) schemes used to achieve high data throughput in 3G networks. Simulation is done in AWGN channel using soft decision viterbi decoder for decoding convolutionally encoded data. Comparative simulation of Stop & Wait protocol using Chase combining and Incremental redundancy is shown.
There is a visible evolution in the telecommunication networks from pure voice traffic to the service provisioning. In this article, we focus on the evolution of the service provisioning platforms, from the Intelligent Networks towards the IP Multimedia Subsystem as the Next Generation Networks implementation. We stress the latest progress in the standardization activities, like common IMS and multimedia...
This article proposes a solution for two issues in current communications. Firstly, that IMS suffers from client inexistence. Secondly, that mobile operators want to give the subscriber a possibility to access their VoIP network and efficiently cover special areas like airports. To address these problems, we have developed a novel service architecture, which allows 2G subscribers access to a SIP based...
A major challenge in the optical networking in the metropolitan area is the design of a robust and simple access scheme for building a flexible metro network. In this regard, we consider the bus-based approach of the Passive Optical Networks (PON) with the asynchronous CSMA/CA protocol. We present an enhancement of the CSMA/CA scheme, called LOCOMOTIVE, which takes benefit from the transparent nodes...
The evolution strategy of NGN laboratory towards the converged networks based on IP Multimedia Subsystem (IMS) as trends and aims for implementation of converged NGN network is presented in the article. This article describes actual implementation of NGN laboratory and future planned extensions and integration work for incorporating IMS core elements to our laboratory as unified service control subsystem...
Subscriber databases are substantial points of any network. Evolution from classical telecommunication networks to NGN has changed them and also services they provide. New functionalities are required and they should fulfill more complex tasks. In this article, we present subscriber databases and their evolution from GSM network through UMTS to the newest technology IMS. This trend includes evolution...
Traffic profile can have crucial impact on the network performance in general. In this paper, we present our framework, which allows us to analyze on-line several traffic properties. Presented framework is a base of independent scripts, which are responsible for tasks from Ethernet trace capturing, through their analysis to the presentation of data on web page.
-The evolution strategy of NGN laboratory towards the converged networks based on IP multimedia subsystem (IMS) as trends and aims for implementation of converged NGN network is presented in the article. This article describes actual implementation of NGN laboratory and future planned extensions and integration work for incorporating IMS core elements to our laboratory as unified service control subsystem...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.