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WiMAX Campus Deployment Columbia University

WiMAX Campus Deployment Columbia University. Prof. Henning Schulzrinne SungHoon Seo Jan Janak Marcus Knuepfer. WiMAX @ Columbia - Status. Deployment On-site installation completed on 23 rd June 2011 Location: Mudd Building 16 th floor

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WiMAX Campus Deployment Columbia University

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  1. WiMAX Campus Deployment Columbia University Prof. Henning Schulzrinne SungHoonSeo Jan Janak Marcus Knuepfer

  2. WiMAX @ Columbia - Status • Deployment • On-site installation completed on 23rd June 2011 • Location: • Mudd Building 16th floor • ASN-GW, IDU and ODU mounted inside the building • Sector antenna is mounted outside at a railing • Additionally a PDU (power distribution unit) is installed to control power remotely 27th July 2011

  3. WiMAX @ Columbia - Status Deployment Sector antenna mounted outside at a railing Triplite 12U rack (IDU, ASN-GW, Router and PDU) ODU mounted inside the building

  4. WiMAX @ Columbia - Status Deployment Conceptual diagram of deployment 27th July 2011

  5. WiMAX @ Columbia - Status Deployment Line of sight 27th July 2011

  6. WiMAX @ Columbia - Status Deployment Expected coverage Mudd building 27th July 2011

  7. WiMAX @ Columbia - Status • Measurements • Signal quality measurements (RSSI, CINR): create downlink and uplink coverage map • GPS signal (reflections, signal shadow) problems  not possible to use wimax_gps_oml2 tool as intended • Defined 125 locations on campus and measured signal parameters at each spot • Used www.gpsvisualizer.com to create coverage map 27th July 2011

  8. WiMAX @ Columbia - Status • Results – Downlink signal strength CINR coverage map RSSI coverage map 27th July 2011

  9. WiMAX @ Columbia - Status • Results – Downlink signal strength • Results of the first measurement surveys: • Mobile clients work well • Connection to the Base Station is possible until a downlink RSSI of -75 dBm • Signal covers nearly the entire campus • Bad coverage at the edges behind high buildings • Good performance when in LOS 27th July 2011

  10. WiMAX @ Columbia - Status • Measurements – Uplink signal strength • We wanted to know the parameters (RSSI, CINR) of the received signal of the client at the BS • Parameters are logged at the ASN-GW1 • For our measurement: • Used Windows Laptop with the AWB USB adapter • Used the already defined locations and logged the time we were at the location • Evaluated the transmission power of the client in comparison to the uplink RSSI 27th July 2011 1: /var/log/wimax-measurements.dat

  11. WiMAX @ Columbia - Status • Results – Uplink coverage map Uplink RSSI from client at the different locations Uplink CINR Transmission power of the client 27th July 2011

  12. WiMAX @ Columbia - Status • Future work • Throughput and delay measurements (iperf) • Installation of OMF/OML • Creation of a teaching module for students • Measurements with other mobile clients (e.g., Nexus S phones) • Effects of WiMAX services class settings on real-time communication • Integration with NetServ framework in controller 27th July 2011

  13. NetServ For WiMAX Service Provider 2. Install Module • Let experimenters run code at BS • Simple and secure (Java OSGI) • Deploy code across hosts deep in network • Media Control: • Transcode (channel bandwidth) • Cache (popular content) • Localize (Insert local information) • Limited Channel Control: • Setup Multicast/Broadcast zones • Adjust parameters in real-time • Configure service flows • Complements Existing Frameworks: • OMF/OML: Test bed control • AggMgr: HW control • NetServ: Data/media control • NetServ is a GENI related project Data 3. Setup MB Zone ASN GW RF AggMgr Module NetServ Container Module Channel Ctrl/Info Transcoded Data R6 NEC Base Station WiMAX Base Station MBS Data 27th July 2011

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