@conference{Sarigiannidis2010c,

title = {A novel adaptive mapping scheme for IEEE 802.16 mobile downlink framing},

author = { P.G. Sarigiannidis and G.I. Papadimitriou and P. Nicopolitidis and M.S. Obaidat and A.S. Pomportsis},

url = {https://www.researchgate.net/publication/221288841_A_Novel_Adaptive_Mapping_Scheme_for_IEEE_80216_Mobile_Downlink_Framing},

doi = {10.1109/GLOCOM.2010.5683645},

year  = {2010},

date = {2010-01-01},

journal = {GLOBECOM - IEEE Global Telecommunications Conference},

abstract = {IEEE 802.16 (WiMAX) constitutes one of the most promising broadband access technologies for high-capacity and high-distance wireless access networks, supporting user mobility. The contribution of this paper is twofold. Firstly, a novel mapping scheme for IEEE 802.16 Mobile standard is introduced, applying horizon mapping. Secondly, an efficient adaptive prediction-based scheme is devised, which is able to adjust the downlink sub-frame capacity, accordingly to the traffic load, since the standard allows the downlink-to-uplink subframe ratio to be changeable from 3:1 to 1:1. The novel adaptive horizon burst mapping (AHBM) scheme is evaluated by simulation experiments, which indicate that the proposed scheme operates effectively and efficiently, by reducing the number of unserved users, the number of unserved traffic requests, and the portion of wasted bandwidth. ©2010 IEEE.},

keywords = {Downlink mapping, IEEE 802.16, OFDMA, prediction},

pubstate = {published},

tppubtype = {conference}

}

@conference{Sarigiannidis20101406,

title = {Applying quality of service prediction in WDM optical networks},

author = { P.G. Sarigiannidis},

url = {https://www.researchgate.net/publication/233835727_Applying_Quality_of_Service_Prediction_in_WDM_Optical_Networks},

doi = {10.1109/MELCON.2010.5476023},

year  = {2010},

date = {2010-01-01},

journal = {Proceedings of the Mediterranean Electrotechnical Conference - MELECON},

pages = {1406-1410},

abstract = {A dynamic prediction scheme is presented in this paper, named PROPHET. The purpose of the proposed technique is to predict, given two different classes of quality of service (QoS), the total amount of the demanded transmission requests per QoS class. PROPHET is constructed based on Hidden Markov Chains (HMC), modeled by an ergodic framework. The prediction objective is to reduce the amount of time spent in computing the transmission schedule by predicting traffic requests. The evaluation of the predictor is realized in a Wavelength Division Multiplexing (WDM) single-hop network with star topology. Furthermore, PROPHET is compared to a previous prediction-based scheme, called POSA. Simulation results indicate that the novel technique supports efficient predictable QoS, since it operates more accurately than POSA. © 2010 IEEE.},

keywords = {},

pubstate = {published},

tppubtype = {conference}

}

@conference{Sarigiannidis201064,

title = {A new approach to the design of MAC protocols for WDM-EPONs},

author = { P.G. Sarigiannidis and S.G. Petridou and G.I. Papadimitriou and M.S. Obaidat},

url = {https://www.researchgate.net/publication/233835732_A_new_approach_to_the_design_of_MAC_protocols_for_WDM-EPONs},

doi = {10.1109/MELCON.2010.5476337},

year  = {2010},

date = {2010-01-01},

journal = {Proceedings of the Mediterranean Electrotechnical Conference - MELECON},

pages = {64-67},

abstract = {Medium Access Control (MAC) protocols for WDM Ethernet passive optical networks (WDM-EPONs) suffer from low performance when the users' round trip times are different. In this paper a new MAC protocol for WDM-EPONs is introduced which overcomes the above limitation by filling the gaps in the scheduling program. Moreover, the proposed scheme favors the requests that present a burst-like behavior, by altering the nodes' service order in such a way that further eliminating the aforementioned gaps. The performance of the proposed scheme is being studied via simulation results which indicate that it achieves a significantly lower delay and packet loss ratio in relation to the well-known WDM IPACT protocol. © 2010 IEEE.},

keywords = {},

pubstate = {published},

tppubtype = {conference}

}

@conference{Kakali20101263,

title = {Speeding up the adaptation process in adaptive wireless push systems by applying spline interpolation technique},

author = { V.L. Kakali and P.G. Sarigiannidis and G.I. Papadimitriou and A.S. Pomportsis},

url = {https://www.researchgate.net/publication/224142711_Speeding_Up_the_Adaptation_Process_in_Adaptive_Wireless_Push_Systems_by_Applying_Spline_Interpolation_Technique},

doi = {10.1109/MELCON.2010.5475939},

year  = {2010},

date = {2010-01-01},

journal = {Proceedings of the Mediterranean Electrotechnical Conference - MELECON},

pages = {1263-1268},

abstract = {In wireless push systems, the server schedules the broadcasts of its information items aiming at satisfying the clients' preferences efficiently. Latest research efforts have proposed adaptive push systems, enhanced with a learning automaton, in which the server has the ability to update its estimated item demand probability vector. This vector indicates the level of the items' desirability. Even though the adaptive push systems are capable of operating in dynamic environments, where the item demand probability distribution changes periodically, the time that the learning automaton needs to adapt its estimated probability vector to a new demand probability distribution leads to degradation of the system's performance. This work addresses this problem, by applying the spline interpolation method to produce an estimation of the changed desirability immediately after this change takes place. A set of indicative feedback samples are collected by the server and the new item demand probability distribution function is approximated, providing the learning automaton with estimated item probabilities, as initial probabilities. Extensive simulation results indicate the superiority of the proposed scheme, in terms of mean response time © 2010 IEEE.},

keywords = {},

pubstate = {published},

tppubtype = {conference}

}

@conference{Papazoglou200963,

title = {Techniques for improved scheduling in optical burst switched networks},

author = { C. Papazoglou and P.G. Sarigiannidis and G.I. Papadimitriou and A.S. Pomportsis},

doi = {10.1109/ISADS.2009.5207359},

year  = {2009},

date = {2009-01-01},

journal = {Proceedings - 2009 International Symposium on Autonomous Decentralized Systems, ISADS 2009},

pages = {63-66},

abstract = {Optical burst switching (OBS) has emerged as a viable switching alternative in backbone optical networks since it can support high data rates with an intermediate granularity compared to wavelength routing and optical packet switching. At the edges of an OBS cloud, packets are assembled to form bursts which enter the network core and are switched on the fly using bandwidth previously reserved by their control packets at each node. A key problem in OBS networks is the assignment of wavelengths to incoming bursts, i.e. the scheduling of bursts. This paper proposes two new techniques which are shown to improve burst scheduling algorithms by lowering their complexity. The first proposed technique is based on a triangular estimator that defines a "drop zone", bursts that fall into this area are considered to have a very low probability of finding a suitable wavelength and as such, no effort is made to schedule them. According to the second approach, the drop zone is defined dynamically based on the burst drop history. Simulation results show that both approaches yield burst drop rates marginally higher or identical to the LAUC-VF scheduling algorithm while reducing the number of channel or void checks and thus the algorithm complexity and execution time.},

keywords = {Burst scheduling, Bursty traffic, Drop history, Horizon, Latest available unused channel with void filling, Optical burst switching, Triangular estimator},

pubstate = {published},

tppubtype = {conference}

}

@conference{Sarigiannidis2009472,

title = {A quality of service scheduling technique for optical LANs},

author = { P.G. Sarigiannidis and S.G. Petridou and G.I. Papadimitriou and M.S. Obaidat and A.S. Pomportsis},

url = {https://www.researchgate.net/publication/221429798_A_Quality_of_Service_Scheduling_Technique_for_Optical_LANs},

doi = {10.1109/AICCSA.2009.5069366},

year  = {2009},

date = {2009-01-01},

journal = {2009 IEEE/ACS International Conference on Computer Systems and Applications, AICCSA 2009},

pages = {472-477},

abstract = {Quality of Service (QoS) support has become a key factor in designing Media Access Control (MAC) protocols. This paper introduces a novel scheduling scheme which supports priority based QoS in Wavelength Division Multiplexing (WDM) star networks. The proposed Interval-based Prioritized Orderly Scheduling Strategy (IPOSS) employs a collision-free scheduling approach and handles variable-length data packets. In practice, it is designed to handle real-time traffic, on the basis that each node may generate high- and low-priority packets with high-priority packets being scheduled prior to low-priority ones. Moreover, the proposed scheme differentiates the packets' schedule order, by prioritizing the long-length over the short-length packets. The performance of IPOSS is evaluated under Bernoulli traffic and simulation results indicate that the novel scheme achieves a significantly high throughput-delay performance for real-time traffic, without sacrificing the performance for non-real-time traffic. © 2009 IEEE.},

keywords = {},

pubstate = {published},

tppubtype = {conference}

}