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Search Publications by: Chunmei Liu (Fed)

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Displaying 1 - 18 of 18

System-Level Evaluation of 5G NR UE-Based Relays

December 25, 2023
Author(s)
Samantha Gamboa Quintiliani, Aziza Ben Mosbah, Wesley Garey, Chunmei Liu, Richard A. Rouil
The notion of UE-based relays started with the introduction of Proximity Services (ProSe) and Device-to-Device (D2D) communication, and evolved with the adaptation of the Fifth Generation (5G) New Radio (NR) interface. While the main goal of relays is to

5G New Radio Sidelink Link-Level Simulator and Performance Analysis

October 24, 2022
Author(s)
Peng Liu, Chen Shen, Chunmei Liu, Fernando Cintron, Lyutianyang Zhang, Liu Cao, Richard A. Rouil, Sumit Roy
Since the Third Generation Partnership Project (3GPP) specified 5G New Radio (NR) sidelink in Release 16, researchers have been expressing increasing interest in sidelink in various research areas, such as Proximity Services (ProSe) and Vehicle-to

2019 Public Safety Broadband Stakeholder Presentations by NIST Authors

October 25, 2021
Author(s)
Richard A. Rouil, Tom Henderson, Marco Mezzavilla, Michele Polese, Jaden Pieper, Chunmei Liu, Silas Thompson, David W. Griffith, Christopher Walton, Christopher D. Dennis, Fabio C. da Silva, John S. Garofolo, James M. Horan, Samuel Hood, Julie Stroup, Christine Task, Terese Manley, Sam Ray, Alison Kahn, Maxwell Maurice, Hien V. Nguyen, Frederick R. Byers, Kristen K. Greene, Mary Theofanos, Yee-Yin Choong, Sandra Spickard Prettyman, Pamela J. Konkol, Jeffrey Cichonski, Bill Fisher, Gema Howell, Mike Dolan, Adam Lewis, Michael Ogata, John Beltz, Michael Bartock, Sarah Hughes, Santosh Rajvaidya, Craig Connelly, Scott Ledgerwood, Megan Waldock, Dereck R. Orr, Donald Bradshaw, Jeb Benson
2019 Public Safety Broadband Stakeholder Presentations by NIST Authors

Modeling Public Safety Communication Scenarios: School Shooting Incident

October 15, 2021
Author(s)
Richard A. Rouil, Antonio Izquierdo Manzanares, Chunmei Liu, Wesley Garey
Public safety practitioners performing day-to-day activities and responding to incidents communicate in ways that are very different from the general public. In order to determine if a particular technology or network deployment can meet the performance

Study of 5G New Radio (NR) Support for Direct Mode Communications

May 7, 2021
Author(s)
Fernando Cintron, David W. Griffith, Chunmei Liu, Richard A. Rouil, Yishen Sun, Jian Wang, Peng Liu, Chen Shen, Aziza Ben Mosbah, Samantha Gamboa Quintiliani
In public safety communications, direct mode communication is essential to keep first responders connected, especially when there is no network coverage. Direct mode communication is supported in Third Generation Partnership Project (3GPP) Long Term

A Comprehensive Analysis on Multicast and Unicast Performance and Selection

April 14, 2021
Author(s)
Chen Shen, Chunmei Liu, Richard A. Rouil
Multicast transmission has long been studied along with its evolved standards, but few work provides comprehensive comparisons to Long Term Evolution (LTE) unicast transmissions. With focus on LTE Multicast Broadcast Single Frequency Network (MBSFN)

Study of Multicast Broadcast Single Frequency Network Area in Multicast Communication

December 15, 2020
Author(s)
Chen Shen, Chunmei Liu, Richard A. Rouil, Hyeong Ah-Choi
Multicast was introduced in Long-Term Evolution (LTE) in release 8 as the technology of the Evolved Multimedia Broadcast Multicast Services (eMBMS) and has been steadily updated in the later releases. Its prominent advantage in full resource access of each

PSCR 2020_Multicast and Unicast in Serving Public Safety Traffic

October 29, 2020
Author(s)
Chunmei Liu
Given a significant amount of group traffic in public safety incidents, multicast has the potential to outperform unicast in terms of precious spectrum savings and first responders’ experience. In this study and for both unicast and multicast, we explore

Evaluating Unicast and MBSFN in Public Safety Networks

September 3, 2020
Author(s)
Chunmei Liu, Chen Shen, Jack Chuang, Richard A. Rouil, Hyeong-Ah Choi
Public safety incidents typically involve a significant amount of group traffic and have a stringent requirement of connection reliability. Hence multicast could potentially improve network and user performance significantly, which triggered our study on

Blind Calibration of Phase Drift in Millimeter-Wave Channel Sounders

June 11, 2020
Author(s)
Jack Chuang, Jelena Senic, Chunmei Liu, Camillo Gentile, Sung Yun Jun, Derek Caudill
Millimeter-wave channel sounders are much more sensitive to phase drift than their microwave counterparts by virtue of shorter wavelength. This matters when coherently phasing (electronic or mechanical) antenna scans collected over seconds, minutes, or

Throughput Analysis between Unicast and MBSFN from Link Level to System Level

November 7, 2019
Author(s)
Chunmei Liu, Chen Shen, Jack Chuang, Richard A. Rouil, Hyeong-Ah Choi
Public safety incidents typically involve significant amount of group traffic. This paper initializes our study in exploring the potential spectrum savings and improvement in first responders experience by using Multicast Broadcast Single Frequency Network

Guidelines for Generating Public Safety Benchmark Scenario Set

May 1, 2019
Author(s)
Richard A. Rouil, Chunmei Liu, Antonio Izquierdo Manzanares
There is a need to establish well-defined, public safety scenarios for the evaluation of current and future communication technologies for first responders. The scenario descriptions must contain enough details to be considered representative of key public