Browsing by Author "Akar, Nail"
Now showing items 21-39 of 39
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Markov modulated periodic arrival process offered to an ATM multiplexer
(IEEE, 1993-11-12)When a superposition of on/off sources is offered to a deterministic server, a particular queueing system arises whose analysis has a significant role in ATM based networks. Periodic cell generation during active times is ... -
A matrix analytical method for the discrete time Lindley equation using the generalized Schur decomposition
(ACM, 2006)In this paper, we study the discrete time Lindley equation governing an infinite size GI/GI/1 queue. In this queuing system, the arrivals and services are independent and identically distributed but they obey a discrete ... -
Model-free adaptive hysteresis for dynamic bandwidth reservation
(IEEE, 2007-10)Dynamic bandwidth reservation refers to the process of dynamically updating the bandwidth allocation to a connection between two network end points on the basis of actual aggregate traffic demand of the connection. We ... -
The multi-source probabilistically preemptive M/PH/1/1 queue with packet errors
(IEEE, 2021-08-20)Analytical modeling of Age of Information (AoI) and Peak AoI (PAoI) has recently drawn a lot of attention in the context of quantitative assessment of information freshness in status update systems. In this paper, we study ... -
On the Queuing Model of the energy-delay tradeoff in wireless links with power control and link adaptation
(IEEE, 2019-05)A transmission profile refers to a transmission power and a modulation and coding scheme to be used for packet transmissions over a wireless link. The goal of this paper is to develop transmission profile selection policies ... -
Optimal packet scheduling and rate control for video streaming
(SPIE, 2007)In this paper, we propose a new low-complexity retransmission based optimal video streaming and rate adaptation algorithm. The proposed OSRC (Optimal packet Scheduling and Rate Control) algorithm provides average reward ... -
Packet loss analysis of synchronous buffer-less optical switch with shared limited range wavelength converters
(IEEE, 2007)Application of synchronous optical switches in Optical Packet/Burst switched networks is considered. The shared per node architectural concept, where wavelength converters are shared among all input and output channels, ... -
Performance analysis of an asynchronous transfer mode multiplexer with Markov modulated inputs
(Bilkent University, 1993)Asynchronous Transfer Mode (ATM) networks have inputs which consist of superpositions of correlated cell streams. Markov modulated processes are commonly used to characterize this correlation. The first step through ... -
Performance analysis of an optical packet switch employing full/limited range share per node wavelength conversion
(IEEE, 2007)In this paper, we study an asynchronous optical packet switching node equipped with a number of limited range or full range wavelength converters shared per node. The packet traffic is realistically modeled by a superposition ... -
A performance evaluation framework of a rate-controlled MPEG video transmission over UMTS networks
(IEEE, 2007-07)UMTS is designed to offer high bandwidth radio access with QoS assurances for multimedia communications. In particular, real-time video communications services are expected to become a successful experience under UMTS ... -
A performance study of limited range partial wavelength conversion for asynchronous optical packet/burst switching
(IEEE, 2006)In this work, we study an asynchronous optical packet/burst switching node equipped with a number of limited range wavelength converters shared per output link. A wavelength conversion policy is one by which the outgoing ... -
Power allocation and temporal fair user group scheduling for downlink NOMA
(Springer, 2021-08)Non-Orthogonal Multiple Access (NOMA) has been proposed as a new radio access technique for cellular networks as an alternative to OMA (Orthogonal Multiple Access) in which the users of a group (pairs or triples of users ... -
Queue management for two-user cognitive radio with delay-constrained primary user
(Elsevier, 2018)In this paper, two novel Queue Management Policies (QMP) are proposed for Quality of Service (QoS) enhancement of a two-user Cognitive Radio Network (CRN) comprising a Primary User (PU) and Secondary User (SU), the latter ... -
Reinforcement learning as a means of dynamic aggregate QoS provisioning
(Springer, 2003-03)Dynamic capacity management (or dynamic provisioning) is the process of dynamically changing the capacity allocation (reservation) of a virtual path (or a pseudo-wire) established between two network end points. This process ... -
A reordering-free multipath traffic engineering architecture for DiffServ-MPLS networks
(IEEE, 2003-10)We propose a novel traffic engineering architecture for IP networks with multiprotocol label switching (MPLS) backbones. In this architecture, two (primary and secondary) label switched paths (LSPs) are established among ... -
rtPS uplink scheduling algorithms for IEEE 802.16 networks
(Boğaziçi University, 2008-06)IEEE 802.16 MAC provides flexible bandwidth allocation and QoS mechanisms for users with different requirements. However, QoS scheduling is not specified by the 802.16 standard and is thus left open for vendors' implementation. ... -
Solving the single server semi-Markov queue with matrix exponential kernel matrices for interarrivals and services
(ACM, 2006)Markov renewal processes with semi-Markov kernel matrices that have matrix-exponential representations form a superset of the well-known phase-type renewal process, Markovian arrival process, and the recently introduced ... -
Steady-state and first passage time distributions for waiting times in the MAP/M/s+G queueing model with generally distributed patience times
(AIMS Press, 2022-11-30)We study the MAP/M/s+G queueing model that arises in various multi-server engineering problems including telephone call centers, under the assumption of MAP (Markovian Arrival Process) arrivals, exponentially distributed ... -
Transient and first passage time distributions of first- and second-order Multi-Regime Markov Fluid Queues via ME-fication
(Springer, 2020)We propose a numerical method to obtain the transient and first passage time distributions of first- and second-order Multi-Regime Markov Fluid Queues (MRMFQ). The method relies on the observation that these transient ...
