U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

A Unified Analytical Approach to Multi-Cell LBT-Based Spectrum Sharing Systems

Published

Author(s)

Yao Ma, Somayeh Mosleh, Jason B. Coder

Abstract

Future unlicensed spectrum sharing scenarios involve multi-cell, multi-tier access of incumbent and emerging wireless systems, such as wireless local area network (WLAN), new-radio unlicensed (NR-U), and long-term evolution (LTE)with licensed assisted access (LAA). Listen-before-talk (LBT) medium access control (MAC) is a common technique used for channel sensing and access control. Despite intense research effort, the majority of available results have not accurately analyzed imperfect spectrum sensing and multi-cell LBT. Furthermore, while past works involved two major spectrum sharing strategies - shared cell access (SCA) and exclusive cell access (ECA), there lacked a systematic comparison between the two. In this paper, we develop a unified analytical approach which maps the effects of imperfect spectrum sensing and multi- cell, multi-tier LBT to the achieved key performance indicators (KPIs) of LAA and WLAN cells. We provide an analytical comparison between the SCA and ECA schemes, and show that the SCA can provide a significantly higher system throughput than the ECA as a function of sensing thresholds. By developing a new simulation method, we program the SCA and ECA algorithms and implement Monte Carlo simulations, which verify our analytical results. Numerical results provide insightful observations on effects of various parameters. This result provides powerful analytical and simulation tools to evaluate the performance of multi-tier LBT coexistence systems with imperfect sensing, and effectively supports coexistence system optimization.
Proceedings Title
The 2020 IEEE 91st Vehicular Technology Conference: VTC2020-Spring
Conference Dates
May 25-28, 2020
Conference Location
Antwerp
Pub Type
Conferences

Download Paper

Local Download

Keywords

Imperfect spectrum sensing, LTE-LAA, Multi-cell LBT, Multi-tier coexistence, WLAN
Wireless (RF), Next generation networks, Network modeling and analysis and Mobile and wireless networking

Citation

Ma, Y. , Mosleh, S. and Coder, J. (2020), A Unified Analytical Approach to Multi-Cell LBT-Based Spectrum Sharing Systems, The 2020 IEEE 91st Vehicular Technology Conference: VTC2020-Spring, Antwerp, -1, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=929074 (Accessed January 15, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created May 28, 2020, Updated March 6, 2020