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Performance Assessment of QoS-Aware LTE Sessions Offloading Onto LAA/WiFi Systems

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Performance Assessment of QoS-Aware LTE Sessions Offloading Onto LAA/WiFi Systems. / Markova, Ekaterina; Moltchanov, Dmitri; Gudkova, Irina; Samouylov, Konstantin; Koucharyavy, Yevgeni.

In: IEEE Access, Vol. 7, 21.03.2019, p. 36300-36311.

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Markova, Ekaterina ; Moltchanov, Dmitri ; Gudkova, Irina ; Samouylov, Konstantin ; Koucharyavy, Yevgeni. / Performance Assessment of QoS-Aware LTE Sessions Offloading Onto LAA/WiFi Systems. In: IEEE Access. 2019 ; Vol. 7. pp. 36300-36311.

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@article{4a020ac131a94c04b8e32e49c17f052a,
title = "Performance Assessment of QoS-Aware LTE Sessions Offloading Onto LAA/WiFi Systems",
abstract = "Fifth-generation (5G) cellular systems are expected to orchestrate a variety of air interfaces. In this heterogeneous setting 4G, LTE systems will remain of special importance providing service over a relatively large area not covered with the 3GPP new radio technology. However, the scarcity of radio resources below 6 GHz as well as constantly increasing user traffic demands call for efficient offloading strategy from the LTE network. In this paper, we consider and compare two LTE session offloading strategies, including LAA and WiFi offloading. Although by design, the LAA system supports quality-of-service (QoS) guarantees in terms of minimum throughput, the assured performance might still be violated by resource reallocations when satisfying the compulsory fairness criteria. To assess and compare the performance of these schemes, we develop an analytical framework that takes into account specifics of duty-cycle schedule-based Licensed Assisted LTE Access (LAA) system with connection admission control (CAC), resource reallocation mechanism, and realistic elastic traffic nature. As a special case of the developed framework, we also address the offloading of QoS-aware LTE sessions into conventional WiFi. Our numerical results indicate that WiFi offloading is characterized by a significantly greater number of offloaded sessions. However, this advantage comes at the expense of severe performance degradation in terms of minimum throughput guarantees. Implementing CAC procedures, LAA efficiently addresses this problem. We conclude that WiFi offloading of QoS-aware LTE sessions can be used in light traffic conditions only. On the other hand, offloading to the schedule-based LAA system allows preserving QoS over a wide range of arrival traffic statistics.",
keywords = "3G mobile communication, 4G mobile communication, 5G mobile communication, cellular radio, Long Term Evolution, quality of service, resource allocation, telecommunication congestion control, telecommunication scheduling, telecommunication traffic, wireless LAN, QoS-aware LTE sessions offloading, LAA/WiFi systems, fifth-generation cellular systems, 3GPP new radio technology, radio resources, LTE network, LTE session offloading strategies, WiFi offloading, quality-of-service, resource reallocations, duty-cycle schedule-based Licensed Assisted LTE Access system, resource reallocation mechanism, schedule-based LAA system, traffic demands, traffic nature, Wireless fidelity, Quality of service, 3GPP, Throughput, Resource management, LTE, Licensed Assisted Access, LAA, QoS, WiFi, elastic traffic, session interruption probability, drop probability, mean bit rate",
author = "Ekaterina Markova and Dmitri Moltchanov and Irina Gudkova and Konstantin Samouylov and Yevgeni Koucharyavy",
year = "2019",
month = "3",
day = "21",
doi = "10.1109/ACCESS.2019.2905035",
language = "English",
volume = "7",
pages = "36300--36311",
journal = "IEEE Access",
issn = "2169-3536",
publisher = "Institute of Electrical and Electronics Engineers",

}

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TY - JOUR

T1 - Performance Assessment of QoS-Aware LTE Sessions Offloading Onto LAA/WiFi Systems

AU - Markova, Ekaterina

AU - Moltchanov, Dmitri

AU - Gudkova, Irina

AU - Samouylov, Konstantin

AU - Koucharyavy, Yevgeni

PY - 2019/3/21

Y1 - 2019/3/21

N2 - Fifth-generation (5G) cellular systems are expected to orchestrate a variety of air interfaces. In this heterogeneous setting 4G, LTE systems will remain of special importance providing service over a relatively large area not covered with the 3GPP new radio technology. However, the scarcity of radio resources below 6 GHz as well as constantly increasing user traffic demands call for efficient offloading strategy from the LTE network. In this paper, we consider and compare two LTE session offloading strategies, including LAA and WiFi offloading. Although by design, the LAA system supports quality-of-service (QoS) guarantees in terms of minimum throughput, the assured performance might still be violated by resource reallocations when satisfying the compulsory fairness criteria. To assess and compare the performance of these schemes, we develop an analytical framework that takes into account specifics of duty-cycle schedule-based Licensed Assisted LTE Access (LAA) system with connection admission control (CAC), resource reallocation mechanism, and realistic elastic traffic nature. As a special case of the developed framework, we also address the offloading of QoS-aware LTE sessions into conventional WiFi. Our numerical results indicate that WiFi offloading is characterized by a significantly greater number of offloaded sessions. However, this advantage comes at the expense of severe performance degradation in terms of minimum throughput guarantees. Implementing CAC procedures, LAA efficiently addresses this problem. We conclude that WiFi offloading of QoS-aware LTE sessions can be used in light traffic conditions only. On the other hand, offloading to the schedule-based LAA system allows preserving QoS over a wide range of arrival traffic statistics.

AB - Fifth-generation (5G) cellular systems are expected to orchestrate a variety of air interfaces. In this heterogeneous setting 4G, LTE systems will remain of special importance providing service over a relatively large area not covered with the 3GPP new radio technology. However, the scarcity of radio resources below 6 GHz as well as constantly increasing user traffic demands call for efficient offloading strategy from the LTE network. In this paper, we consider and compare two LTE session offloading strategies, including LAA and WiFi offloading. Although by design, the LAA system supports quality-of-service (QoS) guarantees in terms of minimum throughput, the assured performance might still be violated by resource reallocations when satisfying the compulsory fairness criteria. To assess and compare the performance of these schemes, we develop an analytical framework that takes into account specifics of duty-cycle schedule-based Licensed Assisted LTE Access (LAA) system with connection admission control (CAC), resource reallocation mechanism, and realistic elastic traffic nature. As a special case of the developed framework, we also address the offloading of QoS-aware LTE sessions into conventional WiFi. Our numerical results indicate that WiFi offloading is characterized by a significantly greater number of offloaded sessions. However, this advantage comes at the expense of severe performance degradation in terms of minimum throughput guarantees. Implementing CAC procedures, LAA efficiently addresses this problem. We conclude that WiFi offloading of QoS-aware LTE sessions can be used in light traffic conditions only. On the other hand, offloading to the schedule-based LAA system allows preserving QoS over a wide range of arrival traffic statistics.

KW - 3G mobile communication

KW - 4G mobile communication

KW - 5G mobile communication

KW - cellular radio

KW - Long Term Evolution

KW - quality of service

KW - resource allocation

KW - telecommunication congestion control

KW - telecommunication scheduling

KW - telecommunication traffic

KW - wireless LAN

KW - QoS-aware LTE sessions offloading

KW - LAA/WiFi systems

KW - fifth-generation cellular systems

KW - 3GPP new radio technology

KW - radio resources

KW - LTE network

KW - LTE session offloading strategies

KW - WiFi offloading

KW - quality-of-service

KW - resource reallocations

KW - duty-cycle schedule-based Licensed Assisted LTE Access system

KW - resource reallocation mechanism

KW - schedule-based LAA system

KW - traffic demands

KW - traffic nature

KW - Wireless fidelity

KW - Quality of service

KW - 3GPP

KW - Throughput

KW - Resource management

KW - LTE

KW - Licensed Assisted Access

KW - LAA

KW - QoS

KW - WiFi

KW - elastic traffic

KW - session interruption probability

KW - drop probability

KW - mean bit rate

U2 - 10.1109/ACCESS.2019.2905035

DO - 10.1109/ACCESS.2019.2905035

M3 - Article

VL - 7

SP - 36300

EP - 36311

JO - IEEE Access

JF - IEEE Access

SN - 2169-3536

ER -