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Research Interests: Computer Science, Networks, Resource Allocation, Memory Management, Computer Network, and 11 moreUser needs, Outage Probability, Throughput, Queues, wireless ATM links, Resource Allocations, Electrical And Electronic Engineering, Queue, Applications of Information Theory in Wireless Communications, Channel State Information, and Polynomial Time
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As communication systems evolve to better cater to the needs of machine-type applications such as remote monitoring and networked control, advanced perspectives are required for the design of link layer protocols. The age of information... more
As communication systems evolve to better cater to the needs of machine-type applications such as remote monitoring and networked control, advanced perspectives are required for the design of link layer protocols. The age of information (AoI) metric has firmly taken its place in the literature as a metric and tool to measure and control the data freshness demands of various applications. AoI measures the timeliness of transferred information from the point of view of the destination. In this study, we experimentally investigate AoI of multiple packet flows on a wireless multi-user link consisting of a transmitter (base station) and several receivers, implemented using software-defined radios (SDRs). We examine the performance of various scheduling policies under push-based and pull-based communication scenarios. For the push-based communication scenario, we implement age-aware scheduling policies from the literature and compare their performance with those of conventional scheduling...
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Research Interests: Scheduling, Resource Allocation, Wireless networks, Quality of Service, Feedback, and 14 moreFading, Bandwidth Allocation, Resource Management, Throughput, Spread Spectrum Communication, Power allocation, Boolean Satisfiability, Relay Network, Mobile stations, Base station, Optimal Solution, Mobile Station, Channel Allocation, and OFDM modulation
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In this work we consider the problem of downlink re- source allocation for proportional fairness of long term received rates of data users and quality of service for real time sessions in an OFDMA-based wireless system. The base station... more
In this work we consider the problem of downlink re- source allocation for proportional fairness of long term received rates of data users and quality of service for real time sessions in an OFDMA-based wireless system. The base station allocates avail- able power and subchannels to individual users based on long term average received rates, quality of service (QoS) based
Research Interests: Distributed Computing, Algorithm, Equity, Numerical Method, Optimization, and 15 moreProblem Solving, Numerical Simulation, Quality of Service, Communications networks, Performance Improvement, Fading, Real Time, Metropolitan Area Network, Joint, Power Optimization, Bandwidth, Articulation, Orthogonal Frequency Division Multiplexing, Base station, and Downlink
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In this paper we study the problem of subframe, subchannel and power allocation in OFDMA-based multihop relay networks. The system consists of a base station (BS), a number of relay stations (RS) and mobile stations (MS). We consider... more
In this paper we study the problem of subframe, subchannel and power allocation in OFDMA-based multihop relay networks. The system consists of a base station (BS), a number of relay stations (RS) and mobile stations (MS). We consider frame by frame scheduling, where the frame is divided into two subframes such as BS-RS and RS-MS subframes. We study two different problems, satisfying link rate requirements with minimum weighted total power and maximizing proportional fairness. For the first problem we find the optimal solution and also propose a less complex subframe and bandwidth allocation scheme with good performance. For the second problem, we propose an algorithm that outperforms an existing scheme with less feedback.
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... Routing in Wireless Networks Using Rateless Codes Mehdi Duman , Tolga Girici Elektrik ve Elektronik Mühendisligi Bölümü TOBB Ekonomi ve Teknoloji ¨Universitesi Ankara 1mduman,tgiricil@etu.edu.tr ... Bu de˘gerler sabit ve ileticiler... more
... Routing in Wireless Networks Using Rateless Codes Mehdi Duman , Tolga Girici Elektrik ve Elektronik Mühendisligi Bölümü TOBB Ekonomi ve Teknoloji ¨Universitesi Ankara 1mduman,tgiricil@etu.edu.tr ... Bu de˘gerler sabit ve ileticiler tarafından biliniyor kabul edilmektedir. ...
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... ABSTRACT Title of dissertation: RESOURCE ALLOCATION SCHEMES FOR OFDMA BASED WIRELESS SYSTEMS WITH QUALITY OF SERVICE CONSTRAINTS Tolga Girici, Doctor of Philosophy, 2007 Dissertation directed by: Professor Anthony Ephremides... more
... ABSTRACT Title of dissertation: RESOURCE ALLOCATION SCHEMES FOR OFDMA BASED WIRELESS SYSTEMS WITH QUALITY OF SERVICE CONSTRAINTS Tolga Girici, Doctor of Philosophy, 2007 Dissertation directed by: Professor Anthony Ephremides Department of ...