LTE and Wi-Fi Coexistence

Overview

Label	Value
Version	Formal
RF ID	50005
RF Description	50005 (LTE-WiFi with mobility scenario + 70dB)
Noise power BW	20 MHz
Usable BW for transmissions	80 MHz
Traffic ID	500050
Traffic Description	Default (WiFi: Video, LTE UE1: VOIP, LTE UE2: Vehicle Safety service)
Center Frequency	1.0 GHz
Number of Nodes	5
Duration	70 seconds

Narrative

This scenario has been intended to study the interference of the WiFi IEEE802.11ac network on the LTE mobile UE with ISM band carrier aggregation in an urban campus scenario. In this scenario, a portion of the Northeastern University Boston campus is considered with WiFi coverage that serves students and staff with the Internet service.

In addition, there are two mobile LTE UEs in vehicles that are passing the campus area through Huntington avenue moving between Gainsborough street and the Forsyth street intersection with a set velocity.

The LTE network can operate both in the dedicated licensed band as well as in an unlicensed ISM band in coexistence with the WiFi network. The LTE base station (eNodeB) is a small cell, mounted on a building wall, and the outdoor WiFi access point is mounted on the rooftop of the Ell Hall building.

The green dots represent the sample of channels for the three mobile users including the WiFi users located in the campus Krentzman quadrangle. The arrangement of the LTE eNodeB and WiFi AP in this scenario demonstrates the combination of Line of Sight (LOS) and Non-Line of Sight (NLOS) communication channel states with respect to the location of the mobile users along their trajectory.

Figure 1: LTE-WiFi coexistence scenario in the Northeastern Boston campus wireless environment showing the positions of LTE BS, LTE UEs, WiFi AP, and WiFi UE.

Node Placement

The table below indicates which node id’s map to which label in the physically simulated wireless environment:

Node ID #	Node Name
1	LTE BS (eNodeB)
2	WiFi AP
3	LTE UE #1
4	LTE UE #2
5	WiFi UE

Mobility Details

The details for the mobility type, pattern and velocity can be found in the tables below.

Scenario Parameters

Label	Value
Modeled Location	Northeastern University, Boston campus
Scenario Duration	70 [S]
Scenario Repeats at End?	True
Number of Nodes	5
Number of Teams	NA
Government Controlled Radios	NA
Ray-tracing simulation frequency	5.8 GHz
Emulation Center Frequency	1 GHz
Max Scenario Bandwidth	80.0 MHz
SRN Separation Range	NA
Node Mobility	LTE UEs: Route, WiFi UE: Random Way Point (RWP)
Link Reciprocity	NA
Self Channel (Gain to Own Antenna)	only reflections
Antenna Pattern	Isotropic
Number of Antennas Per Node	2 (identical channel)
Antenna Spacing	NA

Additional Information

See the scenario manual for more information on how to use MATLAB to build RF scenarios for Colosseum.