Wireless Community Ajmal Nazir Green Dot Ltd. AGENDA Introduction Wireless Network Coverage Spectrum Planning NMS (Network Management System)

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Presentation transcript:

Wireless Community Ajmal Nazir Green Dot Ltd

AGENDA Introduction Wireless Network Coverage Spectrum Planning NMS (Network Management System)

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

Green Dot Ltd Wireless Networking

Green Dot Ltd Wireless Network Point to Multipoint

Green Dot Ltd PTMP

Green Dot Ltd PTMP and PTP

Green Dot Ltd Connecting to the Internet

Green Dot Ltd Connecting to the Internet

Green Dot Ltd Redundancy/Load Balancing Mesh protocol Capacity Redundancy scalability

Green Dot Ltd Simple Mesh Network

Green Dot Ltd 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 Coverage

Green Dot Ltd Wireless Coverage

Green Dot Ltd

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

Green Dot Ltd Distance Chart Budget (db)Distance (m)

Green Dot Ltd Coverage Analysis

Green Dot Ltd RF Mapping Tools

Green Dot Ltd Spectrum Planning

Green Dot Ltd 802 Standards /a/b/g/n /a/d/e/m x

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

Green Dot Ltd 2.4 Spectrum

Green Dot Ltd Channel Planning

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

Green Dot Ltd NMS (Network Management System)

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

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

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

Green Dot Ltd Multipath

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

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

Green Dot Ltd Questions and Answers ? Ajmal Nazir

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