ofdm nlos broadband deployment - unamprofesores.fi-b.unam.mx/wireless/articulos/ofdm_nlos.pdf ·...
TRANSCRIPT
WCA Tech ‘03Jan 14, 2003, San Jose, CA
OFDM NLOS Broadband Deployment
Operational Systems in Small Town / Regional
and Large Urban Markets
1WCA Tech ‘03Jan 14, 2003, San Jose, CA
OFDM NLOS Deployment Case Studies
Kingsley, Iowa� Single sector RF system
� Single ISP network
� Network scales up to serve regional market
Mexico City� Multiple cells and sectors, frequency reuse
� Mobile broadband service
� RF network serves multiple ISPs
2WCA Tech ‘03Jan 14, 2003, San Jose, CA
Water Tower with Omni Antenna
3WCA Tech ‘03Jan 14, 2003, San Jose, CA
Residential Subscriber
4WCA Tech ‘03Jan 14, 2003, San Jose, CA
Received Signal Strength margin above sensitivity, outdoor, 1st floor levelyellow > 21 dB, red 15-21 dB, light blue 10-15 dB, green 5-10 dB, dark blue 0-5 dB
Kingsley - Single Sector Omni Antenna Coverage
9 subscriberlocations(all use
indoor CPE)
Population 1245Households 569Subscribers 145
Omni AntennaHeight 100� AGL
Circles show1 to 5 mileDistance
Service alsoattained at
additional points,up to 18 mile range
~ 99% servicesuccess rate
5WCA Tech ‘03Jan 14, 2003, San Jose, CA
RF Market(s) with Single ISP Network
Access Domain
Management and ISP Network
CRM
RF BaseStation
Access, Provisioning,& DHCP Server
Router
Optional equipmentSwitch, SLA Enforcer, & DHCP server
for single-site system
Router
ISP / Network ProviderDomain
SLA Enforcer
Internet
Backhaul foradditional RF markets
Router
�Hotspot� Wireless AP
or Hub
Indoor & Outdoor CPEsSubscriber PCsCell Site
6WCA Tech ‘03Jan 14, 2003, San Jose, CA
Cell Site
4 Base stations
SWITCH
Cell Site
4 Base stations
SWITCH
ISP 1
Internet
Internet
Internet
Cell Site
4 Base stations
SWITCH
SWITCH
DS3
DS3
G Ethernet
ISP 2
Router to Internet
Mngmnt Switch
Network Prov iderNetwork
ISP support Web Server
Netw ork ManagementServer
Access ProviderServer
Syslog / Statistics
ISP DomainACCESSLAYER
Network ProviderDomain
CPE
CPE
CPE
CPE
CPE
CPE
CPECPE
CPE
Router to InternetSw itch
Prov isioningServ er
SLA Enforcer
CRM Server
Mail Serv erHosting Serv er
Router to InternetSw itch
Prov isioningServ er
SLA Enforcer
CRM Server
Mail Serv er
Hosting Serv er
Sw itch
Prov isioningServ er
SLA Enforcer
CRM Server
Mail Serv erHosting Serv er
ISP 3
Multiple ISP Network
7WCA Tech ‘03Jan 14, 2003, San Jose, CA
Mexico City
Dense urban environmentAltitude 2200 to 3600 mMetro area population ~ 25 millionInitial phase coverage challenge…� Reliable indoor NLOS broadband
service with much lower density of sites than PCS
8WCA Tech ‘03Jan 14, 2003, San Jose, CA
Mexico City Terrain and NLOS RF Sites
Initial target area� Core urban
� Key residential
� Pop. ~ 4 million
17 sites now installed� 64 sectors
� TDD
� 5 channel reuse
ISP test results� 90% indoor service
success attained
9WCA Tech ‘03Jan 14, 2003, San Jose, CA
High Rise Site – Torre Altus
120 m building heightTerrain elevation 2576 mTested NLOS coverage� Indoor 14-16 km
� Outdoor 20 km (furthest point tested)
� System range up to 32 km
10WCA Tech ‘03Jan 14, 2003, San Jose, CA
Torre Altus Antenna View
11WCA Tech ‘03Jan 14, 2003, San Jose, CA
Typical Mexico City Antenna View
Polanco area� Near major hotels
Building height 50 mTerrain elevation 2248 m
12WCA Tech ‘03Jan 14, 2003, San Jose, CA
Mexico City NLOS SubscriberCoverage with Wall Penetration
13WCA Tech ‘03Jan 14, 2003, San Jose, CA
OFDM Base Station & Antenna Installation
Base station installation� Compact
� Does not require adaptive or diversity antennas
� Channels set remotely, no hardware change to adjust frequency plan
14WCA Tech ‘03Jan 14, 2003, San Jose, CA
Las Lomas Site – Private Residence
Available site in priority service areaMultiple sectors for capacity, reuseLightweight rooftop towerLow load antenna system
15WCA Tech ‘03Jan 14, 2003, San Jose, CA
Mexico City RF Coverage – Cellular Frequency Reuse
TDD, 5 channel reuseAnalysis includes…� Terrain
� 25-35 dB clutter loss
Carrier to interference plus noise [C/(I+N)] margin above sensitivity, outdoors, at 1st floor level� Yellow > 21 dB
� Red > 15 dB
� Light blue > 10 dB
RSS margin > 15 dB for all colored points
16WCA Tech ‘03Jan 14, 2003, San Jose, CA
MVS NLOS Broadband Applications
WiFi�Hotspot�
LANs
1 2 34 5 67 8 9* 8 #
1 2 34 5 67 8 9* 8 #
Concentrador
IP
IP
Video Conferencing
Point of sale Terminals
Fleet Applications
PC
Laptops
Voice over IP
Security
WiredLANs
Control andmonitoring ofVendingMachines
ATMs
WiFi�Hotspot�
LANs
17WCA Tech ‘03Jan 14, 2003, San Jose, CA
OFDM NLOS Mobile Broadband Test
Enabled by OFDM DSP� Frequency domain equalizer
� Does not require adaptive or diversity antenna
Mobile antenna - omni, 0 dBiCell roamingThroughput success rate 98%� Average includes all coverage
conditions, multiple handoffs
� Coverage maintained at speed > 100 km/hr
� Moderate to very heavy traffic
18WCA Tech ‘03Jan 14, 2003, San Jose, CA
Mobile Test – View from Base Antenna
19WCA Tech ‘03Jan 14, 2003, San Jose, CA
OFDM NLOS Mobile Test
20WCA Tech ‘03Jan 14, 2003, San Jose, CA
OFDM NLOS Mobile Test
21WCA Tech ‘03Jan 14, 2003, San Jose, CA
OFDM NLOS Mobile Test
22WCA Tech ‘03Jan 14, 2003, San Jose, CA
OFDM NLOS Deployment
Small town/regional service – modular systemsVery large markets – cellular coverageMobile NLOS broadband serviceNetwork solution scales for…� Multiple markets
� Multiple ISPs
23WCA Tech ‘03Jan 14, 2003, San Jose, CA
To obtain electronic copy of this presentation…
NextNet Wireless, Inc.9555 James Ave. South, Suite 270Minneapolis, MN 55431 USA
www.nextnetwireless.com
Phone: 952-929-4008E-mail: [email protected]