Papers by Aleksandar Tudzarov
Abstract: In this paper we propose new design for network and protocols architectures of future 5... more Abstract: In this paper we propose new design for network and protocols architectures of future 5G mobile networks. The proposed design is based on user-centric mobile environment with heterogeneous radio access technologies. In the proposed design the user terminal has possibility to change the Radio Access Technology - RAT based on certain criteria. For that purpose we split the network layer on two network sub-layers, lower and upper one. The lower one is network IP layer, providing identification of the wireless interface to the given mobile network, so there are different IP addresses for different RAT interfaces. The upper IP layer, so-called here virtual network layer provides identification of the network layer towards the applications in the mobile terminals, and there is only one IP address, so tunneling is used over different RATs towards the central tunnel endpoint called Policy Router, which establishes IP tunnels to the mobile terminal via different available RATs to t...
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This paper is focused on development of algorithm for network selection in Hybrid wireless enviro... more This paper is focused on development of algorithm for network selection in Hybrid wireless environment based on user-side perspective. Client terminal in the proposed hybrid access design has possibility to change the Radio Access Technology - RAT based on different criteria. The selection of the RAT is performed by the wireless terminal using the user agent algorithm for decision making based on the experience from the performance measurements of RATs conducted by the client terminal in the past. We present results of simulation analysis of the proposed intelligent wireless RAT selection algorithm on the client-side for scenario with basic RAT technologies, WWAN and WLAN. The results showed that the presented algorithm gives better results compared to the traditional RAT selection algorithms and as such can play valuable role in designing of RAT selection algorithms for Next Generation Networks
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Mobilni telefon predstavlja multifunkcionalni telekomunikacijski uređaj, koji postaje neraskidlji... more Mobilni telefon predstavlja multifunkcionalni telekomunikacijski uređaj, koji postaje neraskidljiv deo ljudske svakodnevnice. Mobilne telefone danas koriste sve generacije. Korisnici svoje mobilne telefone uvek nose sa sobom. Posedovanje više uređaja ili korisničkih brojeva više nije isključak već potreba. Mobilni telefoni su bogat izvor različitih podataka i informacija, počevši od ličnih podataka pa sve do podataka važnih za uspešno poslovanje preduzeća, državnih institucija i same države[1]. Ovo znači da je pitanje bezbednosti najviši prioritet, zato što su oni putem Interneta dostupni svakom korisniku bez odzira na nameru. U ovom radu dat je pregled načina, alata i procedura za akviziciju podataka koji se nalaze na mobilnim telefonima kao i specifike povezane sa forenzikom mobilnih telefona u krivičnim postupcima, od aspekta digitalnog dokaza kao suštinskog rezultata digitalne forenzičke analize. Ključne reči — mobilni telefon, digitalna forenzika, softverski forenzički alat
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This paper focuses on providing of novel technique for authentication and encryption in Next Gene... more This paper focuses on providing of novel technique for authentication and encryption in Next Generation Mobile Networks. The novel technique uses higher level of authentication methods that offer more flexibility and are based on well developed and proven IT security standards. Implementation of proposed technique will simplify the authentication process and will bring more simplified and manageable authentication environment that will cover fix/mobile convergence and can scale for different level of service needed security. By combining of several protocols that are used in process of network authentication like DIAMETER/EAP methods with PKI as a bases for authentication and by adding new parts in authentication access network architecture like PANA and EAP-SMIL we have proposed new authentication technique that will improve and modernize authentication and encryption process in Next Generation Networks
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International Journal of Computer Applications, 2017
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In the next generation of heterogeneous wireless networks (HWNs), a large number of different rad... more In the next generation of heterogeneous wireless networks (HWNs), a large number of different radio access technologies (RATs) will be integrated into a common network. In this type of networks, selecting the most optimal and promising access network (AN) is an important consideration for overall networks stability, resource utilization, user satisfaction, and quality of service (QoS) provisioning. Work conducted in this paper proposes a AN scheme to solve the access network selection (ANS) problem in the HWN using natural expired algorithms for solving optimization of processes for network selection. Scheme presents a design of general multicriteria software assistant (SA) that consider user, operator, and QoS parameters required by the users and operator in heterogeneous environment. Combined fuzzy logic (FL) optimized with use of Particle Swarm Optimization method (PSO) for optimization of membership function in fuzzy logic controllers (FLC) and multicriteria decision making (MCD...
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Public Land Mobile Networks (PLMN) of 2.5 and 3rd generation of- fer Internet connectivity and IP... more Public Land Mobile Networks (PLMN) of 2.5 and 3rd generation of- fer Internet connectivity and IP-based services on wide coverage areas, but they lack bandwidth for demanding applications. On the other side, Wireless LANs (WLAN) offers many times higher data rates compared to cellular networks, but they can cover only small area spots. This situation leads to the requirement for internetworking between PLMN and WLAN, where WLAN shall be used to cover dense city areas called hotspots. In this paper we describe the design of our applicative solution for internetworking between PLM N and WLAN based on integrated authentication and accounting system. For such purpose we have developed two additional network nodes called WLAN Access Controller and WLAN Authentication, Authorization, and Accounting (AAA) Gateway. The developed applicative solution is targeted to provide cost-effective integration solution that is suitable for mobile operators that want to offer a WLAN service and to charg...
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Wireless heterogeneous environments are a common reality today and will be so even more in the fu... more Wireless heterogeneous environments are a common reality today and will be so even more in the future. This paper is focused on providing a wireless access selection method for the future mobile terminals that will use naturally inspired algorithms for best network selection. The novel algorithm uses mobile terminal measurements from different radio access technologies within a given time window. The network selection is based on specified criteria, whose number can be increased as needed. Each criterion is modeled with a membership function associated with Fuzzy Logic controllers, which are optimized by using Particle Swarm Optimization. Each criterion is weighted, with the aim to assign the influence on the decision for a radio access network. Hence, our proposed algorithm implements past knowledge of the service performances of available wireless networks used by the mobile, to make a decision for network selection on given time intervals. The main contribution in the algorithm f...
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2018 23rd International Scientific-Professional Conference on Information Technology (IT), 2018
This paper presents a view on the new software networks paradigm for future 5G networks that will... more This paper presents a view on the new software networks paradigm for future 5G networks that will help to achieve one of the most important requirements of the NGN like: sustainability, industry compatibility and usability. NG Network should be scalable, self-evolving and capable to address any current and future user needs. Building of closed and strict standards for networks ensures vendor compatibility and interconnectivity on one side but on other side reduces capability for fast evolution and adaptability for user needs. World economy is constantly accelerating and introduces great pressure on telecommunication industry to provide the required capabilities that will satisfy their requirements. This situation results in constant telecommunication struggle to introduce new network capabilities and features in very short time. It is time to start using all the Telecom and IT industry knowledge that we have to help to improve the network evolution. In that manner rebuilding the net...
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Int. J. Commun. Networks Inf. Secur., 2011
In this paper we propose a new design solution for network architecture of future 5G mobile netwo... more In this paper we propose a new design solution for network architecture of future 5G mobile networks. The proposed design is based on user-centric mobile environment with many wireless and mobile technologies on the ground. In heterogeneous wireless environment changes in all, either new or older wireless technologies, is not possible, so each solution towards the next generation mobile and wireless networks should be implemented in the service stratum, while the radio access technologies belong to the transport stratum regarding the Next Generation Networks approach. In the proposed design the user terminal has possibility to change the Radio Access Technology - RAT based on certain criteria. For the purpose of transparent change of the RATs by the mobile terminal, we introduce so-called Policy-Router as node in the core network, which establishes IP tunnels to the mobile terminal via different available RATs to the terminal. The selection of the RAT is performed by the mobile term...
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In this paper we propose an applicative solution for a billing system for interworking between mo... more In this paper we propose an applicative solution for a billing system for interworking between mobile cellular networks and WLANs. The integration between two networks, cellular and WLAN, is performed on the Authentication, Authorization and Accounting i.e. AAA side. For that purpose we have developed WLAN Access Controller and WLAN AAA Charging Gateway, which provide access control as well as charging and billing functionalities for the WLAN service, respectively. The developed solution provides cost-effective and easy-to-deploy PLMN-WLAN internetworking scenario.
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This paper proposes radio access selection algorithm for the next generation wireless networks. T... more This paper proposes radio access selection algorithm for the next generation wireless networks. The proposed algorithm uses mobile terminal measurements from different radio access technologies within a given time interval, with aim to obtain information for multi criteria decision making between different access networks available to the terminal. The proposed algorithm uses fuzzy logic controllers, genetic algorithms and particle swarm optimization for decision making under given input criteria on user velocity, type of service and service parameters, Quality of Service and service costs for the mobile user. The algorithm is compared via simulation analysis with well-known algorithm for radio resource management in mobile networks using different velocities of users, different costs, different service types and different number of users present in the heterogeneous environment. Results showed that the proposed mobile terminal based algorithm for radio access technology selection o...
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In this paper we propose novel network architecture for next generation 5G mobile networks. The p... more In this paper we propose novel network architecture for next generation 5G mobile networks. The proposed architecture is based on user-centric mobile concept in heterogeneous wireless environment. The implementation of the proposed architecture is performed in the service stratum, while the radio access technologies belong to the transport stratum regarding the Next Generation Networks approach. In the proposed architecture the mobile terminal has the possibility to change the Radio Access Technology - RAT based on certain user criteria. For the purpose of transparent change of the RATs by the mobile terminal, we introduce so-called Policy-Router as a new node in the core network, which establishes IP tunnels to the mobile terminal via different available RATs to the terminal. The selection of the RAT is performed by the mobile terminal using user agent for multi-criteria decision making, which is using the newly defined QoS policy-based routing procedure.
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Network Protocols and Algorithms, Apr 30, 2011
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Papers by Aleksandar Tudzarov