2015
A.G. Sarigiannidis; M. Iloridou; P. Nicopolitidis; G. Papadimitriou; F.-N. Pavlidou; P.G. Sarigiannidis; M.D. Louta; V. Vitsas
Architectures and Bandwidth Allocation Schemes for Hybrid Wireless-Optical Networks Journal Article
In: IEEE Communications Surveys and Tutorials, vol. 17, no. 1, pp. 427-468, 2015.
Περίληψη | BibTeX | Ετικέτες: Access networks, DBA, FiWi, hybrid wireless-optical, integrated architectures, LTE, Passive optical networks, WiFi, WiMAX | Σύνδεσμοι:
@article{Sarigiannidis2015427,
title = {Architectures and Bandwidth Allocation Schemes for Hybrid Wireless-Optical Networks},
author = { A.G. Sarigiannidis and M. Iloridou and P. Nicopolitidis and G. Papadimitriou and F.-N. Pavlidou and P.G. Sarigiannidis and M.D. Louta and V. Vitsas},
url = {https://www.researchgate.net/publication/273792922_Architectures_and_Bandwidth_Allocation_Schemes_for_Hybrid_Wireless-Optical_Networks?_sg=Ubu-c9MVnMKQCG9WEfRFKa3Wd26kQdcSp4_xLD8X1dD_RizLK1cy2D7cEwMylTdpH03-cKk38_B5pT0},
doi = {10.1109/COMST.2014.2356640},
year = {2015},
date = {2015-01-01},
journal = {IEEE Communications Surveys and Tutorials},
volume = {17},
number = {1},
pages = {427-468},
abstract = {The combination of the most prestigious optical and wireless technologies for implementing a modern broadband integrated access network has been progressively gaining ground. By extending the network coverage in a cost-efficient way, hybrid wireless-optical networks are able to enclose a larger number of potential subscribers than standalone access architectures. Hence, they are capable of increasing revenue levels and facilitating commercial penetration to the telecom market. At the same time, hybrid wireless-optical networks pose an ambitious, alternative, and efficient solution to coping with new bandwidth-hungry user applications. Hybrid wireless-optical networks incorporate sophisticated modules, fabrics, and network entities to effectively provide adequate quality of service (QoS) provisioning. This survey endeavors to classify the main features of wireless-optical integration. We provide a comprehensive compilation of the latest architectures, integrated technologies, QoS features, and dynamic bandwidth allocation (DBA) schemes. In addition, new trends towards wireless-optical convergence are presented. Moreover, as the up-to-date hybrid network standards remain under development, since there is not yet an integrated standard for approving hybrid network access platforms, we accompany this survey with detailed challenges indicating potential avenues of future research. © 1998-2012 IEEE.},
keywords = {Access networks, DBA, FiWi, hybrid wireless-optical, integrated architectures, LTE, Passive optical networks, WiFi, WiMAX},
pubstate = {published},
tppubtype = {article}
}
The combination of the most prestigious optical and wireless technologies for implementing a modern broadband integrated access network has been progressively gaining ground. By extending the network coverage in a cost-efficient way, hybrid wireless-optical networks are able to enclose a larger number of potential subscribers than standalone access architectures. Hence, they are capable of increasing revenue levels and facilitating commercial penetration to the telecom market. At the same time, hybrid wireless-optical networks pose an ambitious, alternative, and efficient solution to coping with new bandwidth-hungry user applications. Hybrid wireless-optical networks incorporate sophisticated modules, fabrics, and network entities to effectively provide adequate quality of service (QoS) provisioning. This survey endeavors to classify the main features of wireless-optical integration. We provide a comprehensive compilation of the latest architectures, integrated technologies, QoS features, and dynamic bandwidth allocation (DBA) schemes. In addition, new trends towards wireless-optical convergence are presented. Moreover, as the up-to-date hybrid network standards remain under development, since there is not yet an integrated standard for approving hybrid network access platforms, we accompany this survey with detailed challenges indicating potential avenues of future research. © 1998-2012 IEEE.
2014
M. Louta; P. Sarigiannidis; S. Misra; P. Nicopolitidis; G. Papadimitriou
RLAM: A dynamic and efficient reinforcement learning-based adaptive mapping scheme in mobile WiMAX networks Journal Article
In: Mobile Information Systems, vol. 10, no. 2, pp. 173-196, 2014.
Περίληψη | BibTeX | Ετικέτες: channel allocation ratio, IEEE 802.16, Learning, mapping, OFDMA, WiMAX | Σύνδεσμοι:
@article{Louta2014173,
title = {RLAM: A dynamic and efficient reinforcement learning-based adaptive mapping scheme in mobile WiMAX networks},
author = { M. Louta and P. Sarigiannidis and S. Misra and P. Nicopolitidis and G. Papadimitriou},
url = {https://www.researchgate.net/publication/259965632_RLAM_A_Dynamic_and_Efficient_Reinforcement_Learning-based_Adaptive_Mapping_Scheme_in_Mobile_WiMAX_Networks},
doi = {10.3233/MIS-130177},
year = {2014},
date = {2014-01-01},
journal = {Mobile Information Systems},
volume = {10},
number = {2},
pages = {173-196},
abstract = {WiMAX (Worldwide Interoperability for Microwave Access) constitutes a candidate networking technology towards the 4G vision realization. By adopting the Orthogonal Frequency Division Multiple Access (OFDMA) technique, the latest IEEE 802.16x amendments manage to provide QoS-aware access services with full mobility support. A number of interesting scheduling and mapping schemes have been proposed in research literature. However, they neglect a considerable asset of the OFDMA-based wireless systems: the dynamic adjustment of the downlink-to-uplink width ratio. In order to fully exploit the supported mobile WiMAX features, we design, develop, and evaluate a rigorous adaptive model, which inherits its main aspects from the reinforcement learning field. The model proposed endeavours to efficiently determine the downlink-to-uplink width ratio, on a frame-by-frame basis, taking into account both the downlink and uplink traffic in the Base Station (BS). Extensive evaluation results indicate that the model proposed succeeds in providing quite accurate estimations, keeping the average error rate below 15% with respect to the optimal sub-frame configurations. Additionally, it presents improved performance compared to other learning methods (e.g., learning automata) and notable improvements compared to static schemes that maintain a fixed predefined ratio in terms of service ratio and resource utilization. © 2014-IOS Press.},
keywords = {channel allocation ratio, IEEE 802.16, Learning, mapping, OFDMA, WiMAX},
pubstate = {published},
tppubtype = {article}
}
WiMAX (Worldwide Interoperability for Microwave Access) constitutes a candidate networking technology towards the 4G vision realization. By adopting the Orthogonal Frequency Division Multiple Access (OFDMA) technique, the latest IEEE 802.16x amendments manage to provide QoS-aware access services with full mobility support. A number of interesting scheduling and mapping schemes have been proposed in research literature. However, they neglect a considerable asset of the OFDMA-based wireless systems: the dynamic adjustment of the downlink-to-uplink width ratio. In order to fully exploit the supported mobile WiMAX features, we design, develop, and evaluate a rigorous adaptive model, which inherits its main aspects from the reinforcement learning field. The model proposed endeavours to efficiently determine the downlink-to-uplink width ratio, on a frame-by-frame basis, taking into account both the downlink and uplink traffic in the Base Station (BS). Extensive evaluation results indicate that the model proposed succeeds in providing quite accurate estimations, keeping the average error rate below 15% with respect to the optimal sub-frame configurations. Additionally, it presents improved performance compared to other learning methods (e.g., learning automata) and notable improvements compared to static schemes that maintain a fixed predefined ratio in terms of service ratio and resource utilization. © 2014-IOS Press.
T.D. Lagkas; P. Sarigiannidis; M. Louta
Analyzing the mobile WiMAX system resource exploitation of the downlink direction Journal Article
In: Wireless Personal Communications, vol. 77, no. 2, pp. 1117-1127, 2014.
Περίληψη | BibTeX | Ετικέτες: IEEE 802.16e, mapping, OFDMA, Performance analysis, Resource utilization, Simulation, WiMAX | Σύνδεσμοι:
@article{Lagkas20141117,
title = {Analyzing the mobile WiMAX system resource exploitation of the downlink direction},
author = { T.D. Lagkas and P. Sarigiannidis and M. Louta},
url = {https://www.researchgate.net/publication/259442681_Analyzing_the_Mobile_WiMAX_System_Resource_Exploitation_of_the_Downlink_Direction},
doi = {10.1007/s11277-013-1557-2},
year = {2014},
date = {2014-01-01},
journal = {Wireless Personal Communications},
volume = {77},
number = {2},
pages = {1117-1127},
abstract = {Worldwide interoperability for microwave access (WiMAX) constitutes a viable networking technology, providing wireless connectivity in an efficient mannerIn this work, on the grounds of the defined frame structure, a novel performance analysis of the mobile WiMAX standard in terms of the downlink resource utilization is presentedThe analysis is validated via simulation, the results of which are also provided along with numerical results, studying the effectiveness of the OFDMA-based downlink mappingThe results reveal the relationship among the frame dimensions, the mapped request size, and the number of unexploited OFDMA slots. © 2013 Springer Science+Business Media New York.},
keywords = {IEEE 802.16e, mapping, OFDMA, Performance analysis, Resource utilization, Simulation, WiMAX},
pubstate = {published},
tppubtype = {article}
}
Worldwide interoperability for microwave access (WiMAX) constitutes a viable networking technology, providing wireless connectivity in an efficient mannerIn this work, on the grounds of the defined frame structure, a novel performance analysis of the mobile WiMAX standard in terms of the downlink resource utilization is presentedThe analysis is validated via simulation, the results of which are also provided along with numerical results, studying the effectiveness of the OFDMA-based downlink mappingThe results reveal the relationship among the frame dimensions, the mapped request size, and the number of unexploited OFDMA slots. © 2013 Springer Science+Business Media New York.
2013
T.D. Lagkas; P.G. Sarigiannidis; M. Louta; P. Chatzimisios
In: Wireless Networks, vol. 19, no. 4, pp. 547-558, 2013.
Περίληψη | BibTeX | Ετικέτες: Downlink mapping, IEEE 802.16, Intra-frame power saving, Sleep slots, WiMAX | Σύνδεσμοι:
@article{Lagkas2013547,
title = {Exploring the intra-frame energy conservation capabilities of the horizontal simple packing algorithm in IEEE 802.16e networks: An analytical approach},
author = { T.D. Lagkas and P.G. Sarigiannidis and M. Louta and P. Chatzimisios},
url = {https://www.researchgate.net/publication/233790502_Exploring_the_Intra-frame_Energy_Conservation_Capabilities_of_the_Horizontal_Packing_Algorithm_in_IEEE_80216e_Networks_An_Analytical_Approach?_sg=xykvdNc2j2UIG3_dglWCsetpRGt2s_iN1MnAZp-u4XzbkRQzKBvx-0FNuyh9t-g3KiaDHPuvDEJYkEk},
doi = {10.1007/s11276-012-0484-6},
year = {2013},
date = {2013-01-01},
journal = {Wireless Networks},
volume = {19},
number = {4},
pages = {547-558},
abstract = {The power saving capabilities of the mobile devices in broadband wireless networks constitute a challenging research topic that has attracted the attention of researchers recently, while it needs to be addressed at multiple layers. This work provides a novel analysis of the intra-frame energy conservation potentials of the IEEE 802.16e network. Specifically, the power saving capabilities of the worldwide interoperability for microwave access downlink sub-frame are thoroughly studied, employing the well-known simple packing algorithm as the mapping technique of the data requests. The accurate mathematical model, cross-validated via simulation, reveals the significant ability to conserve energy in this intra-frame fashion under different scenarios. To the best of our knowledge, this is the first work providing intra-frame power-saving potentials of IEEE 802.16 networks. Additionally, this is the first study following an analytic approach. © 2012 Springer Science+Business Media, LLC.},
keywords = {Downlink mapping, IEEE 802.16, Intra-frame power saving, Sleep slots, WiMAX},
pubstate = {published},
tppubtype = {article}
}
The power saving capabilities of the mobile devices in broadband wireless networks constitute a challenging research topic that has attracted the attention of researchers recently, while it needs to be addressed at multiple layers. This work provides a novel analysis of the intra-frame energy conservation potentials of the IEEE 802.16e network. Specifically, the power saving capabilities of the worldwide interoperability for microwave access downlink sub-frame are thoroughly studied, employing the well-known simple packing algorithm as the mapping technique of the data requests. The accurate mathematical model, cross-validated via simulation, reveals the significant ability to conserve energy in this intra-frame fashion under different scenarios. To the best of our knowledge, this is the first work providing intra-frame power-saving potentials of IEEE 802.16 networks. Additionally, this is the first study following an analytic approach. © 2012 Springer Science+Business Media, LLC.
T.D. Lagkas; P. Sarigiannidis; M. Louta
On analyzing the intra-frame power saving potentials of the IEEE 802.16e downlink vertical mapping Journal Article
In: Computer Networks, vol. 57, no. 7, pp. 1656-1673, 2013.
Περίληψη | BibTeX | Ετικέτες: Downlink mapping, IEEE 802.16, Intra-frame power saving, Sleep slots, WiMAX | Σύνδεσμοι:
@article{Lagkas20131656,
title = {On analyzing the intra-frame power saving potentials of the IEEE 802.16e downlink vertical mapping},
author = { T.D. Lagkas and P. Sarigiannidis and M. Louta},
url = {https://www.researchgate.net/publication/235951767_On_Analyzing_the_Intra-Frame_Power_Saving_Potentials_of_tbe_IEEE_80216e_Downlink_Vertical_Mapping?_sg=KDoKqCiIgJLlPGKSofBFyHQ3ib8pUfmddqW_QvQLtz4xtG6Kfcbr2Rl_HcoguK0bm06CHKY6zG5ljWM},
doi = {10.1016/j.comnet.2013.02.015},
year = {2013},
date = {2013-01-01},
journal = {Computer Networks},
volume = {57},
number = {7},
pages = {1656-1673},
abstract = {Worldwide Interoperability for Microwave Access (WiMAX) is generally considered as a competitive candidate networking technology for the realization of the 4G vision. Among the key factors towards its successful and widespread deployment are the effective support of mobility and the provision of mechanisms for enabling service access at a high quality level in an efficient and cost-effective manner. Nonetheless, this effort should take into account and adequately address strict and severe energy limitations that the mobile devices are currently facing. Power saving constitutes an issue of vital importance, as mobile terminals continue to incorporate more and more functionalities and energy-hungry features in order to support the ever increasing user requirements and demands. The standard employs variations of power saving classes in a frame-to-frame basis, while recent power saving mechanisms proposed in related research literature limit their activity in whole frames, neglecting, thus, the intra-frame power saving capabilities. In this work, the intra-frame energy conservation potentials of the mobile WiMAX network are studied and a novel analytical approach is provided, focusing on the downlink direction where the bandwidth allocation involves idle intervals and dynamic inactivity periods. Specifically, we endeavour to accurately analyse the potential energy conservation capabilities in an intra-frame point of view, applying the well-known simple packing algorithm to distribute the available bandwidth to the various subscribers. Our analytical findings are thoroughly cross-validated via simulation, providing clear insights into the intra-frame energy reduction capabilities. © 2013 Elsevier B.V.},
keywords = {Downlink mapping, IEEE 802.16, Intra-frame power saving, Sleep slots, WiMAX},
pubstate = {published},
tppubtype = {article}
}
Worldwide Interoperability for Microwave Access (WiMAX) is generally considered as a competitive candidate networking technology for the realization of the 4G vision. Among the key factors towards its successful and widespread deployment are the effective support of mobility and the provision of mechanisms for enabling service access at a high quality level in an efficient and cost-effective manner. Nonetheless, this effort should take into account and adequately address strict and severe energy limitations that the mobile devices are currently facing. Power saving constitutes an issue of vital importance, as mobile terminals continue to incorporate more and more functionalities and energy-hungry features in order to support the ever increasing user requirements and demands. The standard employs variations of power saving classes in a frame-to-frame basis, while recent power saving mechanisms proposed in related research literature limit their activity in whole frames, neglecting, thus, the intra-frame power saving capabilities. In this work, the intra-frame energy conservation potentials of the mobile WiMAX network are studied and a novel analytical approach is provided, focusing on the downlink direction where the bandwidth allocation involves idle intervals and dynamic inactivity periods. Specifically, we endeavour to accurately analyse the potential energy conservation capabilities in an intra-frame point of view, applying the well-known simple packing algorithm to distribute the available bandwidth to the various subscribers. Our analytical findings are thoroughly cross-validated via simulation, providing clear insights into the intra-frame energy reduction capabilities. © 2013 Elsevier B.V.
2012
M. Louta; P. Sarigiannidis; P. Nicopolitidis; G. Papadimitriou; M. Obaidat
Design of an effective QoS-aware mapping scheme using persistent allocation probing Conference
2012.
Περίληψη | BibTeX | Ετικέτες: IEEE 802.16, mapping, OFDMA, QoS, WiMAX | Σύνδεσμοι:
@conference{Louta20124909,
title = {Design of an effective QoS-aware mapping scheme using persistent allocation probing},
author = { M. Louta and P. Sarigiannidis and P. Nicopolitidis and G. Papadimitriou and M. Obaidat},
doi = {10.1109/ICC.2012.6364291},
year = {2012},
date = {2012-01-01},
journal = {IEEE International Conference on Communications},
pages = {4909-4913},
abstract = {Mobile Worldwide Interoperability for Microwave Access (WiMAX) constitutes an attractive trademark for supporting wireless access to Intranets and the Internet. Scheduling and mapping processes are of paramount importance since they dramatically affect the network performance. This work endeavors to provide a robust mapping scheme for the downlink sub-frame with respect to various Quality of Service (QoS) constraints. Each downlink request creates rectangular regions, called Horizons, and the mapping technique applies a persistent probing of the Horizons recorded. The evaluation experiments conducted indicate that the scheme designed beneficially affects the system performance. © 2012 IEEE.},
keywords = {IEEE 802.16, mapping, OFDMA, QoS, WiMAX},
pubstate = {published},
tppubtype = {conference}
}
Mobile Worldwide Interoperability for Microwave Access (WiMAX) constitutes an attractive trademark for supporting wireless access to Intranets and the Internet. Scheduling and mapping processes are of paramount importance since they dramatically affect the network performance. This work endeavors to provide a robust mapping scheme for the downlink sub-frame with respect to various Quality of Service (QoS) constraints. Each downlink request creates rectangular regions, called Horizons, and the mapping technique applies a persistent probing of the Horizons recorded. The evaluation experiments conducted indicate that the scheme designed beneficially affects the system performance. © 2012 IEEE.
2011
P. Sarigiannidis; M. Louta; A. Michalas
2011.
Περίληψη | BibTeX | Ετικέτες: extrapolation, IEEE 802.16, mapping, OFDMA, Splines, WiMAX | Σύνδεσμοι:
@conference{Sarigiannidis2011139,
title = {On effectively determining the downlink-to-uplink sub-frame width ratio for mobile WiMAX networks using spline extrapolation},
author = { P. Sarigiannidis and M. Louta and A. Michalas},
url = {https://www.researchgate.net/publication/221565459_On_Effectively_Determining_the_Downlink-to-Uplink_Sub-frame_Width_Ratio_for_Mobile_WiMAX_Networks_Using_Spline_Extrapolation},
doi = {10.1109/PCI.2011.44},
year = {2011},
date = {2011-01-01},
journal = {Proceedings - 2011 Panhellenic Conference on Informatics, PCI 2011},
pages = {139-143},
abstract = {One of the most valuable design issues of the Worldwide Interoperability for Microwave Access (WiMAX) standard is its flexibility. It allows multiple downlink-to-uplink duration definitions concerning the width of the corresponding sub-frames, thus, the telecommunication companies and businesses are able to define the downlink-to-uplink width from 3:1 to 1:1 respectively to meet the traffic demands of the connected subscribers. However, the decision on defining the most appropriate ratio is not yet solved, since current efforts on developing scheduling and mapping schemes consider it as fixed. In this work, a novel adaptive mapping approach - based on cubic spline extrapolation - is proposed in order to dynamically determine the most appropriate downlink-touplink width ratio in accordance to the downlink and uplink traffic demands. The method proposed is evaluated through realistic simulation scenarios, whereas its performance is compared with static approaches maintaining a fixed ratio. The results indicate that the approach suggested succeeds noticeable improvements in terms of network service capabilities and bandwidth utilization. © 2011 IEEE.},
keywords = {extrapolation, IEEE 802.16, mapping, OFDMA, Splines, WiMAX},
pubstate = {published},
tppubtype = {conference}
}
One of the most valuable design issues of the Worldwide Interoperability for Microwave Access (WiMAX) standard is its flexibility. It allows multiple downlink-to-uplink duration definitions concerning the width of the corresponding sub-frames, thus, the telecommunication companies and businesses are able to define the downlink-to-uplink width from 3:1 to 1:1 respectively to meet the traffic demands of the connected subscribers. However, the decision on defining the most appropriate ratio is not yet solved, since current efforts on developing scheduling and mapping schemes consider it as fixed. In this work, a novel adaptive mapping approach - based on cubic spline extrapolation - is proposed in order to dynamically determine the most appropriate downlink-touplink width ratio in accordance to the downlink and uplink traffic demands. The method proposed is evaluated through realistic simulation scenarios, whereas its performance is compared with static approaches maintaining a fixed ratio. The results indicate that the approach suggested succeeds noticeable improvements in terms of network service capabilities and bandwidth utilization. © 2011 IEEE.
A. Sarigiannidis; P. Nicopolitidis; G. Papadimitriou; P. Sarigiannidis; M. Louta
2011.
Περίληψη | BibTeX | Ετικέτες: IEEE 802.16, Learning automata, mapping, OFDMA, WiMAX | Σύνδεσμοι:
@conference{Sarigiannidis2011353,
title = {Using learning automata for adaptively adjusting the downlink-to-uplink ratio in IEEE 802.16e wireless networks},
author = { A. Sarigiannidis and P. Nicopolitidis and G. Papadimitriou and P. Sarigiannidis and M. Louta},
url = {https://www.researchgate.net/publication/221504931_Using_learning_automata_for_adaptively_adjusting_the_downlink-to-uplink_ratio_in_IEEE_80216e_wireless_networks},
doi = {10.1109/ISCC.2011.5983863},
year = {2011},
date = {2011-01-01},
journal = {Proceedings - IEEE Symposium on Computers and Communications},
pages = {353-358},
abstract = {IEEE 802.16e allows for flexibly defining the relation of the downlink and uplink sub-frames' width from 3:1 to 1:1, respectively. However, the determination of the most suitable ratio is left open to the network designers and the research community. Existing scheduling and mapping schemes are inflexibly designed. In this paper, a novel adaptive mapping scheme is proposed aiming to dynamically adjust the downlink-to-uplink ratio, following adequately the modification of the load requests with respect to both downlink and uplink directions. A learning automaton is exploited in order to sense the performance of the downlink and uplink mapping processes and to determine the most appropriate length ratio of both sub-frames in order to maximize the network performance. The suggested ratio determination scheme is evaluated through realistic scenarios and it is compared with static schemes that maintain a fixed ratio. The results show that our proposed scheme introduces considerable improvement, increasing the network's service ratio and reducing the bandwidth waste. © 2011 IEEE.},
keywords = {IEEE 802.16, Learning automata, mapping, OFDMA, WiMAX},
pubstate = {published},
tppubtype = {conference}
}
IEEE 802.16e allows for flexibly defining the relation of the downlink and uplink sub-frames' width from 3:1 to 1:1, respectively. However, the determination of the most suitable ratio is left open to the network designers and the research community. Existing scheduling and mapping schemes are inflexibly designed. In this paper, a novel adaptive mapping scheme is proposed aiming to dynamically adjust the downlink-to-uplink ratio, following adequately the modification of the load requests with respect to both downlink and uplink directions. A learning automaton is exploited in order to sense the performance of the downlink and uplink mapping processes and to determine the most appropriate length ratio of both sub-frames in order to maximize the network performance. The suggested ratio determination scheme is evaluated through realistic scenarios and it is compared with static schemes that maintain a fixed ratio. The results show that our proposed scheme introduces considerable improvement, increasing the network's service ratio and reducing the bandwidth waste. © 2011 IEEE.
Διεύθυνση
Internet of Things and Applications Lab
Department of Electrical and Computer Engineering
University of Western Macedonia Campus
ZEP Area, Kozani 50100
Greece
Πληροφορίες Επικοινωνίας
tel: +30 2461 056527
Email: ithaca@uowm.gr
