Browsing by Author "Anatory, Justinian"

Now showing 1 - 5 of 5
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    A Price Based Spectrum Sharing Scheme in Wireless Cellular Networks
    (IIST, 2013-11-08) Kalolo, Sadath; Sam, Anael; Machuve, Dina; Anatory, Justinian
    Radio frequency spectrum scarcity has become a high priority research area over the past few years. The huge increase of network subscribers with multimedia applications coupled with underutilization of radio frequency spectrum motivates the search for other measures to address the scarcity of radio frequency spectrum. This work investigates on a price based spectrum sharing scheme for connection-oriented traffic in wireless cellular networks as a solution to address the scarcity of radio frequency spectrum. Dynamic pricing approach is applied with traffic overflows into neighbor networks. Performance evaluations of the scheme at steady state using MATLAB simulations reveal significant gains to the quality of service. Application of the scheme to highly loaded network traffic improves both network revenue and traffic channel utilizations.
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    Comparison of different Channel Modeling Techniques used in the BPLC Systems.
    (World Academy of Science, 2011) Anatory, Justinian; Theethay, Nelson
    The paper compares different channel models used for modeling Broadband Power-Line Communication (BPLC) system. The models compared are Zimmermann and Dostert, Philipps, Anatory et al and Anatory et al generalized Transmission Line (TL) model. The validity of each model was compared in time domain with ATP-EMTP software which uses transmission line approach. It is found that for a power-line network with minimum number of branches all the models give similar signal/pulse time responses compared with ATP-EMTP software; however, Zimmermann and Dostert model indicates the same amplitude but different time delay. It is observed that when the numbers of branches are increased only generalized TL theory approach results are comparable with ATP EMTP results. Also the Multi-Carrier Spread Spectrum (MC-SS) system was applied to check the implication of such behavior on the modulation schemes. It is observed that using Philipps on the underground cable can predict the performance up to 25dB better than other channel models which can misread the actual performance of the system. Also modified Zimmermann and Dostert under multipath can predict a better performance of about 5dB better than the actual predicted by Generalized TL theory. It is therefore suggested for a realistic BPLC system design and analyses the model based on generalized TL theory be used
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    Consumer Preferences for Mobile Carriers in Tanzania: A Case of Group, Family, Age and Gender
    (International Journal of Computer Applications, 2015-04-16) Anatory, Justinian
    This paper investigates age, family, group and gender influence consumer preference for selection of the mobile carrier. About seventy seven students from high learning institutions in Dodoma Municipality participated in responding to prepared questionnaires. The results indicate that family members and friends are contributing in influencing consumer preferences to select mobile services provider, although at smaller margins. This paper revealed also that there is no direct relationship between selection of a mobile carrier and age or gender.
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    Digital Terrestrial Broadcasting Technologies and Implementation Status
    (World Academy of Science, Engineering and Technology, 2013-03-25) Mvungi, Nerey H.; Anatory, Justinian; Simba, Fatuma
    Digital broadcasting has been an area of active research, development, innovation and business models development in recent years. This paper presents a survey on the characteristics of the digital terrestrial television broadcasting (DTTB) standards, and implementation status of DTTB worldwide showing the standards adopted. It is clear that only the developed countries and some in the developing ones shall be able to beat the ITU set analogue to digital broadcasting migration deadline because of the challenges that these countries faces in digitizing their terrestrial broadcasting. The challenges to keep on track the DTTB migration plan are also discussed in this paper. They include financial, technology gap, policies alignment with DTTB technology, etc. The reported performance comparisons for the different standards are also presented. The interesting part is that the results for many comparative studies depends to a large extent on the objective behind such studies, hence counter claims are common.
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    Investigating the Factors Affecting Broadband Adoption in Tanzania: A Case of Dares Salaam, Tanzania
    (International Journal of Computer Applications, 2014-12-15) Nyondo, Samson; Anatory, Justinian; Mtonyole, Nixon
    Broadband access has become an important resource for individuals and communities. A high-speed connection to the internet provides opportunities for many economic, social and cultural benefits. Recent researches in developing countries points to the appalling broadband penetration rates in these countries. An understanding of the factors affecting broadband adoption in these countries is a key to any strategy to improve broadband penetration figures. This paper examined several attitudinal, normative and control factors as identified from literature to provide insights of broadband adopters and non-adopters in Tanzania. The findings suggested that the utilitarian outcomes and relative advantage Nixon Mtonyole The University of Dodoma However, while sub-Saharan Africa has been very successful in increasing access to basic voice communications, and Africa’s rapid adoption of the mobile phone is quickly closing the “digital divide” in voice services, the broadband access gap between the region and the rest of the world is getting wider [4]. On the other hand, broadband availability is not the same as broadband adoption [5]. Despite the importance of broadband to modern life as a transforming technology which is now becoming available in many developing countries, the levels of adoption among the population groups may cause them to fall behind economically, socially, and politically [6]. were the major factors influencing consumers’ decision to adopt broadband in Tanzania. The findings from regression analysis also showed that the relative advantage, utilitarian outcomes and self-efficacy factors were more significant in explaining consumers’ behavioral intention to adopt broadband. On the other hand, the “expenses of broadband services” and “lack of appropriate equipment to access broadband”, had the highest importance rating among the barriers to adopt broadband in Tanzania