Publication detail

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

MARKOVA, E. MOLTCHANOV, D. GUDKOVA, I. SAMOUYLOV, K. KOUCHERYAVY, Y.

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

Fifth-generation (5G) cellular systems are expected to orchestrate a variety of air interfaces. In this heterogeneous setting 4G, LIE 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 LIE 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 LIE 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

LTE; Licensed Assisted Access; LAA; QoS; WiFi; elastic traffic; session interruption probability; drop probability; mean bit rate

Authors

MARKOVA, E.; MOLTCHANOV, D.; GUDKOVA, I.; SAMOUYLOV, K.; KOUCHERYAVY, Y.

Released

21. 3. 2019

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Location

PISCATAWAY

ISBN

2169-3536

Periodical

IEEE Access

Year of study

Number

State

United States of America

Pages from

36300

Pages to

36311

Pages count

URL

https://ieeexplore.ieee.org/document/8672559/

BibTex

@article{BUT161343,
  author="Ekaterina {Markova} and Dmitri {Moltchanov} and Irina {Gudkova} and Konstantin {Samouylov} and Yevgeni {Koucheryavy}",
  title="Performance Assessment of QoS-Aware LTE Sessions Offloading Onto LAA/WiFi Systems",
  journal="IEEE Access",
  year="2019",
  volume="7",
  number="3",
  pages="36300--36311",
  doi="10.1109/ACCESS.2019.2905035",
  issn="2169-3536",
  url="https://ieeexplore.ieee.org/document/8672559/"
}