The main tasks of providing the security management system telecommunication networks in Ukraine are considered. Standards and other regulatory documentation on information telecommunications their systems were analyzed. Special attention is paid to issues as a component functional architecture according concept building TMN network. peculiarities implementation services for terminal or interme...

Non-repudiation is a security service that provides cryptographic evidence to support the settlement of disputes. In this paper, we introduce the state-of-the-art of non-repudiation protocols for multiple entities. We extend an existing multi-party non-repudiation (MPNR) protocol to allow an originator to send different messages to many recipients in a single transaction. We further propose an ...

The ability to guarantee Quality of Service (QoS) is one of the key issues in the creation of a telecommunication system. In this paper, we deal with some aspects of providing QoS in wired cum wireless communication environment, focusing on the specific feature of guaranteeing session continuity when the wireless networks, to which a mobile terminal connects to, are also heterogeneous. The term...

Third generation mobile systems supporting UMTS radio access, will offer a wide range of telecommunication services including voice, video and data. In line with the ETSI GMM report, these services will be provided in both public and private environments via multiple access networks such as ATM, DECT, GSM and UMTS. The evolution path from second generation systems towards UMTS is investigated w...

purpose – the aim of this study is to examine relation between employees’ participation in the organizations decisions making and their psychological empowerment in iran telecommunication company subsidiary of mazanderan province. design / methodology /approach- 250 employees from the iran telecommunication company subsidiary of mazanderan province participated in this study. a spearman's cor...

In this paper, we propose a small switched-beam antenna for mobile terminal. This kind of antenna is a single compact slot antenna fed by microstrip line. This proposed antenna provides three different radiation patterns. The antenna is designed to cover 3G Universal Mobile Telecommunication Systems (UMTS; 1.922.17 GHz). Its advantage is small of size and easy to manufacture. The performance of...

A wireless network is more vulnerable to denial of service (DoS) attacks than a wired one. In this paper we propose a new DoS defense scheme toward actively resisting DoS attacks. A mobile terminal generates an authorized anonymous ID (AAI) using its true ID, and assigns its true ID with the produced AAI. Using an AAI, a legitimate mobile terminal will be authenticated by the wireless network, ...

In this paper, a new structure is provided for the dispersion compensating photonic crystal fibers in order to broaden the chromatic dispersion and increase the dispersion compensating capability in a wide wavelength range. In the structure, putting a combination of circular holes and a star structure in the inner core clad causes the dispersion coefficient profile to be broadened, and addition...

This work deals with a multi-period capacitated location problem inspired by telecommunication access network planning problems, where demands and costs vary from one period to another. On each concentrator site, several capacitated concentrators can be installed at each period. Similarly, several capacitated modules can be installed at each period between each terminal and concentrator sites. ...

A microcomputer based sofiwwre for analysis of radio frequency intetierence is presented in this paper. The latest version 5 of the spectral analysis tool (SAT) contains numerous features essential for effective spectrum management. Included in SAT windows menu are editors of signal/interference, filters, spikes, power spectrum plots, calculators for spectral power, telecommunication link budge...