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Inspired by the awarding of the 30th jubilee IEEE medal “for exceptional contributions to information sciences and systems,” this article is dedicated to the memory of Richard W. Hamming, mathematician and computer scientist. If Shannon’s mathematical theory of communication, including coding, entropy, and channel capacity, can be assumed as cornerstone of the digital world, error-detecting and error-correcting...
Due to the centralized architecture of current cellular networks, the wireless link capacity as well as the bandwidth of the radio access and backhaul networks cannot practically cope with the exponential growth of mobile traffic. In order to meet this challenge, researches on the fifth generation (5G) cellular systems are highly anticipated in the next decade. Advanced technologies such as massive...
Service delivery in a heterogeneous wireless environment requires the selection of an optimal access network. In order for users to be always connected through the optimal available network, it is necessary to develop an adequate technique for its selection. This paper deals with network selection concept as a perspective approach to the always best connected and served paradigm in heterogeneous wireless...
In this paper, the serving model with two Poisson traffics in primary group, whereupon the rejected calls of one of them are directed to the alternative groups in sequence, is investigated. Serving intensity is changed from primary and gets different values in other groups. Generating function technique is used for the analytical solving steady state equations system. Obtained general solution for...
This paper investigates specific systems with overflow traffic. A primary group with two Poisson traffics is considered whereupon the rejected calls from one traffic are directed to the alternative group with changed serving intensities. The generating function technique is used for analytical solving the model with secondary and ternary groups and the model that separately treated the channels in...
Building upon the Bass diffusion model we propose the new forecasting model with variable market potential that depends on the technological availability of telecommunication network infrastructure. This paper presents case study of IPTV service adoption at the Serbian market. The model may be a useful managerial tool for analysing the impact of the network infrastructure investment on diffusion process.
In this paper the primary group with two Poisson traffics is considered whereupon the rejected calls from one of them are directed to the alternative groups and served with changed serving intensity. The generating function technique is used for the analytical solving model with secondary and ternary groups. The obtained analytically solutions essentially reduce constraint concerning the equation...
This paper deals with the problem of security aspects in future mobile networks. Security is important to be recognized in mobile networks for current and future users and implements. In the first par of this presentation, security concepts together with infrastructure security are presented. Five security features groups are emphasized. The second part treats the problem of security context together...
Service delivery in a heterogeneous wireless environment requires the selection of an optimal radio access network. In order that users could be always connected through the optimal network, it is necessary to develop an adequate model for its selection. This paper presents the proposal of optimal network selection algorithm in wireless heterogeneous environment that is based on TOPSIS method when...
This work describes the support for Internet protocol multimedia subsystem (IMS) in mobile communication services. An architecture for accessing multimedia services together with IMS layered service is presented. IMS within universal mobile telecommunication system (UMTS) core network is analyzed, too. The second part deals with an approach for the interoperability between IMS and Web services within...
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