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Wireless Community

Wireless Community. Ajmal Nazir Green Dot Ltd. AGENDA. Introduction Wireless Network Coverage Spectrum Planning NMS (Network Management System). “A Year is an eternity in Networking”. Wireless Define our community Geographically based Interest based Define our Scope Cost Coverage

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Wireless Community

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  1. Wireless Community Ajmal Nazir Green Dot Ltd

  2. AGENDA • Introduction • Wireless Network • Coverage • Spectrum Planning • NMS (Network Management System) Green Dot Ltd

  3. “A Year is an eternity in Networking” • Wireless • Define our community • Geographically based • Interest based • Define our Scope • Cost • Coverage • services Green Dot Ltd

  4. Wireless Networking Green Dot Ltd

  5. Wireless Network • Point to Multipoint Green Dot Ltd

  6. PTMP Green Dot Ltd

  7. PTMP and PTP Green Dot Ltd

  8. Connecting to the Internet Green Dot Ltd

  9. Connecting to the Internet Green Dot Ltd

  10. Redundancy/Load Balancing • Mesh protocol • Capacity • Redundancy • scalability Green Dot Ltd

  11. Simple Mesh Network Green Dot Ltd

  12. Access Point • Radio for ACCESS network (2.4G) for the users • Radio for BH network (5G) for the AP’s (PTP or PTMP) • In built switch • Outdoor enclosures Green Dot Ltd

  13. Coverage Green Dot Ltd

  14. Wireless Coverage Green Dot Ltd

  15. Green Dot Ltd

  16. Coverage • FREE SPACE Budget = 90db • Window (3db) • Wall (6-10db) • 1/2/3 walls • Roof(metal/wood) (3-10db) • Multipath (4db) Green Dot Ltd

  17. Distance Chart Green Dot Ltd

  18. Coverage Analysis Green Dot Ltd

  19. RF Mapping Tools Green Dot Ltd

  20. Spectrum Planning Green Dot Ltd

  21. 802 Standards • 802.11/a/b/g/n • 802.16/a/d/e/m • 802.20 • 802.1x Green Dot Ltd

  22. 2.4 Spectrum 802.11b/g • Channels 1 to 11 • Each channel is 22 MHz in size • Channel spacing is 5 MHz Green Dot Ltd

  23. 2.4 Spectrum Green Dot Ltd

  24. Channel Planning Green Dot Ltd

  25. Interference • CSMA/CA (Carrier Sense Multiple Access Collision Avoidance) • Reduce through put • Change channel/power • Directional antennas/shielding Green Dot Ltd

  26. NMS (Network Management System) Green Dot Ltd

  27. Security • 802.1x • 802.11i • WEP (RC4 stream cipher) • WPA (RC4) AES/DES • WPA2/RSN (AES block cipher) • Authentication Server Green Dot Ltd

  28. NMS (Network Management System) • Security • NAT/DHCP • Routing/firewalls • Traffic engineering • http • P2p • Mail • RTP • Measure usage • Speed (512kbps/1Mb/2Mb…11Mb) • Traffic usage (1/5/10G) Green Dot Ltd

  29. Operations • Monitoring of nodes • Capacity planning • Usage patterns • Redundancy • SLA’s Green Dot Ltd

  30. Multi Antenna System • Upto extra 10db • Extended range • Robust and reliable Green Dot Ltd

  31. Multipath Green Dot Ltd

  32. Other Tools • Space Division Multiple Access (SDMA) • Directional Antennas • Receivers • Channel Bonding Green Dot Ltd

  33. Other Factors • SSID’s – Virtual mesh networks • Roaming • FREE wall gardens • Public Safety Green Dot Ltd

  34. Questions and Answers ? Ajmal Nazir Green Dot Ltd

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