Sponsored by the National Science Foundation 1 WiMAX Campus Deployment Columbia University Prof. Henning Schulzrinne SungHoon Seo Jan Janak Marcus Knuepfer.

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Presentation transcript:

Sponsored by the National Science Foundation 1 WiMAX Campus Deployment Columbia University Prof. Henning Schulzrinne SungHoon Seo Jan Janak Marcus Knuepfer

Sponsored by the National Science Foundation 2 Columbia - Status 27 th July 2011 Deployment On-site installation completed on 23 rd June 2011 Location: Mudd Building 16 th 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

Sponsored by the National Science Foundation 3 Triplite 12U rack (IDU, ASN-GW, Router and PDU) ODU mounted inside the building Sector antenna mounted outside at a railing Deployment Columbia - Status

Sponsored by the National Science Foundation 4 Conceptual diagram of deployment Deployment Columbia - Status 27 th July 2011

Sponsored by the National Science Foundation 5 Deployment Line of sight Columbia - Status 27 th July 2011

Sponsored by the National Science Foundation 6 Deployment Expected coverage Columbia - Status 27 th July 2011 Mudd building

Sponsored by the National Science Foundation 7 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 to create coverage map Columbia - Status 27 th July 2011

Sponsored by the National Science Foundation 8 Results – Downlink signal strength RSSI coverage map CINR coverage map Columbia - Status 27 th July 2011

Sponsored by the National Science Foundation 9 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 Columbia - Status 27 th July 2011

Sponsored by the National Science Foundation 10 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-GW 1 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 Columbia - Status 27 th July : /var/log/wimax-measurements.dat

Sponsored by the National Science Foundation 11 Results – Uplink coverage map Uplink RSSI from client at the different locations Transmission power of the client Columbia - Status 27 th July 2011 Uplink CINR

Sponsored by the National Science Foundation 12 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 Columbia - Status 27 th July 2011

Sponsored by the National Science Foundation 13 NEC Base Station ASN GW RF Agg Mgr R6 MBS Data NetServ Container Module Channel Ctrl/Info Module Service Provider 2. Install Module WiMAX Base Station 3. Setup MB Zone Data Transcoded Data NetServ For WiMAX 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 Agg Mgr: HW control NetServ: Data/media control NetServ is a GENI related project 27 th July 2011