Browsing by Author "Hadjipollas, George"
Now showing items 1-17 of 17
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Article
Adaptive congestion protocol: A congestion control protocol with learning capability
Lestas, Marios; Pitsillides, Andreas; Ioannou, Petros A.; Hadjipollas, George (2007)There is strong evidence that the current implementation of TCP will perform poorly in future high-speed networks. To address this problem many congestion control protocols have been proposed in literature which, however, ...
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Conference Object
Congestion control in differentiated services networks using fuzzy logic
Chrysostomou, Chrysostomos; Pitsillides, Andreas; Hadjipollas, George; Polycarpou, Marios M.; Sekercioglu, Y. Ahmet (2004)The provision of quality of service (QoS) in a differentiated services (Diff-Serv) environment requires an adequate differentiation between high-priority/assured and low-priority/best-effort classes of service in the ...
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Conference Object
A discrete event based simulation environment for enhanced UMTS 3 rd generation networks
Antoniou, Josephina; Vassiliou, Vasos; Pitsillides, Andreas; Hadjipollas, George; Jacovides, N. (2004)This paper presents a new system level simulator that has been developed to evaluate E-UMTS (Enhanced Universal Mobile Telecommunication Systems) 3G Networks. The article describes how the simulator supports different ...
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Conference Object
Enhanced UMTS cellular planning for multiple traffic classes in offices scenarios
Cabral, O.; Velez, F. J.; Hadjipollas, George; Stylianou, Marios; Antoniou, Josephina; Vassiliou, Vasos; Pitsillides, Andreas (2006)It is shown that Enhanced UMTS will be an affordable solution for providing the required network quality and to reduce infrastructure investments in offices scenarios. System capacity results are obtained by using a system ...
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Conference Object
Enhanced UMTS cost/revenue optimisation in offices scenarios
Cabral, O.; Velez, F. J.; Hadjipollas, George; Stylianoi, M.; Antoniou, Josephina; Vassiliou, Vasos; Pitsillides, Andreas (2005)In this paper Enhanced UMTS offices scenarios and classes of services up to wideband are taken into account. A model is proposed for optimising Enhanced UMTS based in costs and revenues. A system level simulator is used ...
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Conference Object
Enhanced UMTS simulation-based planning in office scenarios
Cabral, O.; Velez, F. J.; Hadjipollas, George; Stylianou, Marios; Antoniou, Josephina; Vassiliou, Vasos; Pitsillides, Andreas (Institute of Electrical and Electronics Engineers Inc., 2006)Enhanced UMTS traffic characterisation parameters have been addressed for the offices scenario. By using a system level simulator, results concerning QoS measures as packet delay, blocking and handover failure probabilities ...
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Conference Object
Fuzzy explicit marking for congestion control in differentiated services networks
Chrysostomou, Chrysostomos; Pitsillides, Andreas; Hadjipollas, George; Sekercioglu, Y. Ahmet; Polycarpou, Marios M. (2003)This paper presents a new active queue management scheme, fuzzy explicit marking (FEM), implemented within the differentiated services (Diffserv) framework to provide the congestion control using a fuzzy logic control ...
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Conference Object
Fuzzy logic congestion control in TCP/IP differentiated services networks for quality of service provisioning
Chrysostomou, Chrysostomos; Pitsillides, Andreas; Hadjipollas, George; Sekercioglu, Y. Ahmet; Polycarpou, Marios M. (2004)A two class Fuzzy Explicit Marking (FEM) controller was designed and used in Differentiated Services Networks for quality of service provisioning. The fuzzy control system is designed to regulate the queues of IP routers ...
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Article
Global asymptotic stability of max-min congestion control schemes
Lestas, Marios; Ioannou, Petros A.; Pitsillides, Andreas; Hadjipollas, George (2017)A number of congestion control schemes which adopt the max-min fairness criterion and do not require maintenance of per flow states within the network have been proposed in the literature. The establishment of global ...
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Article
A new estimation scheme for the effective number of users in internet congestion control
Lestas, Marios; Pitsillides, Andreas; Ioannou, Petros A.; Hadjipollas, George (2011)Many congestion control protocols have been recently proposed in order to alleviate the problems encountered by TCP in high-speed networks and wireless links. Protocols utilizing an architecture that is in the same spirit ...
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Conference Object
Power control for efficient multicasting in IP-based 3G and beyond mobile networks
Vlotomas, N.; Antoniou, Josephina; Hadjipollas, George; Vassiliou, Vasos; Pitsillides, Andreas (Institute of Electrical and Electronics Engineers Inc., 2005)Third generation and beyond mobile networks have brought about a demand for new services that refrain from the traditional unicast communication model. These are services demanding transmission to many receivers with ...
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Conference Object
Queue length based internet congestion control
Lestas, Marios; Pitsillides, Andreas; Ioannou, Petros A.; Hadjipollas, George (2007)In this paper we present a new queue length based Internet congestion control protocol which is shown through simulations to work effectively. The control objective is to regulate the queue size at each link so that it ...
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Conference Object
Queue length based internet congestion control123
Lestas, Marios; Pitsillides, Andreas; Ioannou, Petros A.; Hadjipollas, George (2007)In this paper we present a new queue length based Internet congestion control protocol which is shown through simulations to work effectively. The control objective is to regulate the queue size at each link so that it ...
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Conference Object
Queue length based internet congestion controlAAA
Lestas, Marios; Pitsillides, Andreas; Ioannou, Petros A.; Hadjipollas, George (2007)In this paper we present a new queue length based Internet congestion control protocol which is shown through simulations to work effectively. The control objective is to regulate the queue size at each link so that it ...
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Conference Object
Simulating soft handover and power control for enhanced UMTS
Vassiliou, Vasos; Antoniou, Josephina; Pitsillides, Andreas; Hadjipollas, George (2005)In this paper we present a soft handover algorithm for wide band CDMA based E-UMTS networks and the associated power control algorithm. The handover and power control algorithms have been developed and implemented in the ...
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Conference Object
A simulation tool to evaluate radio resource management algorithms for enhanced UMTS
Vassiliou, Vasos; Antoniou, Josephina; Hadjipollas, George; Pitsillides, Andreas (2005)This paper presents a new system level simulator that has been developed to evaluate Radio Resource Management (RRM) techniques in UMTS (Universal Mobile Telecommunication Systems) and enhanced-UMTS networks. The simulator ...
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Master Thesis
Simulative evaluation of idcc in a resource management differentiated services environment
Hadjipollas, George (Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2003-06)The continuously increasing use of computers in the Internet, as well as the need from new applications on quality of service, require efficient ways so the congestion in cases where the demand in bandwidth is increased ...