Sponsored by the National Science Foundation 1

The Poly WiMAX deployment

• The BS (server, IDU) have been installed in the network room of the Library in the ECE Dept Building (5 Metrotech Center)

• The outdoor parts (sector antenna, GPS antenna, ODU) have been installed on the roof of the ECE Dept Building (5 floor building)

• We have got 2 experimental licenses from FCC to operate the WiMAX BS for 2 years

Sponsored by the National Science Foundation 2

Current Status

• The testbed is up and running since September 2010 in a regular basis

• WiMax connectivity on the nodes is tested using different devices such as Wimax Dongle, HTC EVO phones and Wimax laptops

• The signal levels are tested (RSSI and SINR) to map the coverage area around the campus

• Extensive throughput and delay measurements underway

• Video conferencing is tested using the HTC EVO 4G phones.

Sponsored by the National Science Foundation 3

Base Station Installation

• Sector antenna and GPS antenna installation

Sponsored by the National Science Foundation 4

Base Station Installation

• ODU installation

Sponsored by the National Science Foundation 5

Server Installation

• Server installation

Sponsored by the National Science Foundation 6

Clients

Beceem USB clients (Windows) HTC EVO phones

Dell Inspiron Mini 1012 (Linux) Intel Centrino Advanced-N 6250

Sponsored by the National Science Foundation 7

Base Station Installation

• Poly’s location (Downtown Brooklyn)

Sponsored by the National Science Foundation 8

Measurements

• Coverage range (20dBm)

Sponsored by the National Science Foundation 9

Measurements

• Coverage range (3dBm)

Sponsored by the National Science Foundation

Dell Netbook 1012Linux 10.0.4Intel6250 CentrinoInternal antenna

Test Host

Public Internet

Base Station

NYU-Poly

NECWiMAXBS

GRE Tunnel

11

22

33

• Indoors and outdoors measurements on throughput and delay (iperf)

• Many variations in urban area• Throughput from 0.5 to 12Mbps• Asymmetry on the uplink and

downlink

Measurements

Sponsored by the National Science Foundation 11

Experiment 1

WiMAX broadcasting

WiMAX

WiMAX

WiMAX

WiMAX

Communication from the WiMAX interface

Devices may experience data losses due to heterogeneous wireless channel conditions

• Implementation of a WiMAX/WiFi cooperative recovery protocol– .

Sponsored by the National Science Foundation 1212

Experiment 1

Transmitter

Video Client 1

Video Client 2

Recovery Node

wimax

wimax

wimax

wifi

wifiWiMAXbroadcatsing

TCP

Distortion Producer

CoopCluster

Communication from the WiFi interface

Devices run a Cooperative Recovery protocol to dynamically form a cooperative recovery (ad hoc) network and recover the lost multicast data packets from other peers

Sponsored by the National Science Foundation 13

• Development of a campus based power meter infrastructure based on the WiMAX deployment

• Current solutions use Zigbee and USB connections, very low range

Experiment 2ZigBee

30-40 feet

USB

ZigBee30-40 feet

Internet

Sponsored by the National Science Foundation 14

• The data collected in the cloud can then be seen on a web browser or a smartphone.

Experiment 2

Sponsored by the National Science Foundation 15

• Use of the WiMAX deployment for transmitting the measuring data from the measuring points to the internet

Experiment 2ZigBee

30-40 feet

WiMAX

ZigBee30-40 feet

Internet