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- 저자 : Strykhalyuk, Bohdan (검색결과 3 건)
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Device-to-device-based heterogeneous radio access network architecture for mobile cloud computing
Minho Jo,Maksymyuk, Taras,Strykhalyuk, Bohdan,Choong-Ho Cho IEEE 2015 IEEE wireless communications Vol.22 No.3
<P>The emerging heterogeneous mobile network architecture is designed for an increasing amount of traffic, quality requirements, and new mobile cloud computing demands. This article proposes a hierarchical cloud computing architecture to enhance performance by adding a mobile dynamic cloud formed by powerful mobile devices to a traditional general static cloud. A mobile dynamic cloud is based on heterogeneous wireless architecture where device-to-device communication is used for data transmission between user devices. The main advantage of the proposed architecture is an increase in overall capacity of a mobile network through improved channel utilization and traffic offloading from Long Term Evolution-Advanced to device-to-device communication links. Simulations show that the proposed architecture increases the capacity of a mobile network by up to 10 percent depending on the conditions and amount of offloaded data. The offloading probability is also evaluated by taking into consideration the number of devices in the cloudlet and the content matching values. We have gained insight into how content similarity affects offloading probability much more than the number of devices in a cloudlet.</P>
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Fractal Modeling for Multi-Tier Heterogeneous Networks with Ultra-High Capacity Demands
Taras Maksymyuk,Mykola Brych,Ihor Strykhalyuk,Minho Jo 한국산학기술학회 2015 SmartCR Vol.5 No.4
Technology evolution and business interest to emerging IoT concept are driving the rapid development of advanced applications. Multitude of Internet connected devices and things in combination with the cloud based data analytics and knowledge based technologies are major components for the future IoT concept. This results in big data demands that need to be transmitted in over mobile network and requires new intelligent approaches to the network design. In this paper, a new deterministic approach for analysis of multi-tier heterogeneous network is proposed based on the fractal geometry. Proposed solution is well tractable and suitable for every possible topology of heterogeneous network, providing exact information about network capacity and co-channel interference. Two fractal models were developed based on triangular and rectangular pattern and basic geometric equations were derived for multi-tier network topology. Frequency reuse problem was addressed based on the proposed fractal model for cellular and wireless backhaul spectrum and optimal tradeoff between cellular and backhaul capacity was found. Performance simulations show that proposed fractal modeling provides more accurate network analysis in terms of capacity and interference influence in multi-tier heterogeneous networks.
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Study and Development of Next-Generation Optical Networks
Taras Maksymyuk,Stepan Dumych,Olena Krasko,Mykola Kaidan,Bohdan Strykhalyuk 한국산학기술학회 2014 SmartCR Vol.4 No.6
Next-generation optical networks are expected to provide tremendous capacity in order to support upcoming traffic increases. Many technologies are currently being developed for optical transport networks in order to increase throughput, improve energy efficiency and simplify network deployment. The most important problem in current optical networks is transmission of Internet protocol (IP) traffic. Regardless of the tremendous throughput with optical fibers, switching nodes still limit overall network performance. Recently, optical burst switching technology has been developed to overcome this problem. Optical burst switching combines the advantages of both circuit switching and packet switching networks and provides good performance in terms of packet data transmission. Even though optical burst switching networks provide a good mechanism for IP traffic transmission, overall performance is still limited because of access networks. Existing passive optical networks based on Ethernet technology are not fully compatible with optical burst switching, which results in bottlenecks on the border between transport and access networks. In this paper, we present a new method of optical wavelength time-division multiple access (OWTDMA) for passive optical networks. The proposed approach can provide outstanding scalability of network resources and can increase throughput of the optical access network. In addition, we propose implementation of OWTDMA in edge nodes of optical burst switching networks to eliminate bottlenecks between transport and access networks. Simulation results prove the advantage of our proposed approach.
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