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Contents
1. Introduction
2. O-CORNET Nodes
3. O-CORNET Access
4. Applications
5. How to Contribute
2
Objective
• Extend CORNET with software radio nodes for outdoor experiments
• 14 fixed SDR nodes
• 2 mobile SDR nodes
• 4 portable SDR nodes
• 1 sensing node (spectrum analyzer hooked to antenna)
• Fixed nodes located on rooftops of VT campus buildings
• GPS enabled nodes
• Cooperative transmission/reception techniques, cooperative sensing, multiple-input multiple-output (MIMO) antenna systems
3
O-CORNET Nodes
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1
2
4
3
56
7
8
9
10
1112
13
14
5
1. Whittemore-1
2. Durham-1
3. Holden
4. Durham-2
5. Hahn-1
6. Hahn-2
7. Newman Library
8. Signature Engineering Bldg
9. Hutchenson
10.Holtzman
11.Williams-1
12.Williams-2
13.ECE Field Projects Lab
14.Whittemore-2
15.Sensing Node
14 Fixed Nodes
15
3550-3650 MHz NTIA Exclusion Zones
6
Wide band Antenna
Node Computer
N210 with SBX Gigabit Ethernet
Campus Ethernet
Fixed Filter
AUX Antenna
Normal Node
Multi-Antenna Node (Whittemore2) – in preparation
3550-3650 MHz NTIA Exclusion Zones
7
Node ComputerGigabit Ethernet
Campus Ethernet
N210 with SBX
N210 with SBX
N210 with SBX
Eth
ern
et S
wit
ch
N210 with SBX
MIM
O C
able
MIM
O C
able
Gigabit Ethernet
Gigabit Ethernet
10 MHz reference and 1 pps clock
Sensing Node – in preparation
3550-3650 MHz NTIA Exclusion Zones
8
Wide band Antenna
Campus Ethernet
Spectrum Analyzer
100-4000 MHz
GPS Antenna
2 Mobile Nodes – in preparation
3550-3650 MHz NTIA Exclusion Zones
9
Multiband Antenna
RF1
Node Computer
B210 USB 3
Campus Wireless Ethernet
Fixed Filter
Multiband Antenna
RF2
Fixed Filter
6V Rechargable
Radios on the move: on a cart, bicycle, in a car, bus, …
6 Portable Nodes – planned
3550-3650 MHz NTIA Exclusion Zones
10
Relocatable radios as needed
• E110 – USRP (embedded series)
• Can operate without PC, once programmed
How to Access
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12
Network Name IP Address Building Name Node Coordinates
(Deg. N, E), WGS84
Status
ocornet1.ece.vt.edu 128.173.88.61 Whittemore Hall (1) 37.230709,-80.424608 Operational
ocornet2.ece.vt.edu 128.173.92.242 Durham Hall (1) 37.231949,-80.423282 Operational
ocornet3.ece.vt.edu 128.173.206.233 Holden Hall 37.229992,-80.422046 Operational
ocornet4.ece.vt.edu 128.173.93.170 Durham Hall (2), DSP Lab 37.231699,-80.423404 Operational
ocornet5.ece.vt.edu 128.173.156.114 Hahn Hall – North (1) 37.228402,-80.426056 Operational
ocornet6.ece.vt.edu 128.173.156.115 Hahn Hall – North (2) 37.228701,-80.426412 Operational
ocornet7.ece.vt.edu 128.173.126.5 Newman Library 37.228444,-80.419154 Operational
ocornet9.ece.vt.edu 128.173.71.11 Hutcheson Hall 37.22576,-80.423021 Ready
ocornet11.ece.vt.edu 128.173.170.1 Williams Hall (1) 37.22769,-80.424428 Ready
ocornet12.ece.vt.edu 128.173.170.2 Williams Hall (2) 37.22769,-80.424428 Operational
O-CORNET Fixed Node Access
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$ ssh –XC <user_name>@ocornet2.ece.vt.edu
From Terminal Remote Desktop
O-CORNET Fixed Node Access (2)
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Putty Remote Desktop: Tight VNC
1. Open a PUTTY session (or similar utility).
Enter a node name (or IP address), specify
port 22 and SSH.
2. When a terminal window opens you should
see a login prompt. Enter your assigned
user name.
3. Enter your password at the prompt. You will
get a welcome screen. Do not run
upgrades!
4. This is a command line on the remote O-
CORNET node. You will have user and
sudo privileges.
5. To exit, halt your user programs and logout.
Caution: Do not use “Shutdown” with no
options from the command line. This will
disable the node and require a physically
restarting it.
1. Open a terminal or putty session and ssh to the a node.
2. Start the VNC server: vncserver :1 -geometry 1024x768 -depth
16 -pixelformat rgb565 (or just “vncserver” for default settings).
3. Enter and verify a password for the VNC session (This is a self-
assigned password and does not always have to be repeated.)
4. Open the TightVNCViewer. Open the session ex:
128.173.92.242:1 or o-cornet2.ece.vt.edu (Durham1 Node)
5. Enter your O-CORNET user password when prompted.
6. You should be viewing the remote desktop.
7. Close your user software to exit Tight VNC. Close the vnc
session.
8. Return to the terminal or putty and close your vnc session ex:
vncserver :1 –kill
9. Close the ssh session.
Applications
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Applications
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• Experiment with waveforms, such as libLTE
• WiFi Transceiver
• WiFi Localization
• Zigbee PHY and MAC
• 802.15.4 localization
• MIMO
• CoMP
• Gen 1 RFID reader
• Tracking of moving node
• Radio Environment Maps (REM) create a data base for spectrum sharing
• …
How to Contribute 3550-3650 MHz NTIA Exclusion Zones
17
• Use O-CORNET and feedback your experience
• Setup and use GPS-reference clock/oscillators
• Setup and use mobile and/or portable nodes
• Replicate demos, create own demos
• …
Summary
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O-CORNET extends VT-CORNET testbed
• 10+ fixed nodes spread around campus
• mobile nodes, to be deployed on moving objects/vehicles
• portable nodes, to complement fixed and mobile nodes
• sensing node: spectrum analyzer hooked to an antenna
