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Linking Buildings Using Wireless

Linking Buildings Using Wireless. Basics involved in creating data links over 2.4 and 5GHz wireless. Types of wireless links. Simple single remote building direct to a single central building: point-to-point (PTP) links.

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Linking Buildings Using Wireless

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  1. Linking Buildings Using Wireless Basics involved in creating data links over 2.4 and 5GHz wireless

  2. Types of wireless links • Simple single remote building direct to a single central building: point-to-point (PTP) links. • Multiple remote buildings direct to a single central building: point-to-multipoint (PTM) links.

  3. Types of wireless links • PTP or PTM links using repeaters to dog-leg around obstructions. • Meshing systems where a spiders web of repeater nodes interconnect giving multiple routes connecting clients and sites together.

  4. Wireless Basics • A wireless link will consist of one radio device at one end talking to another • A few basics.

  5. WiFi doesn’t see through walls or obstructions • An Antenna doesn’t make signal

  6. Do a link budget • Set the data link speed to the link speed you actually need for the job

  7. Too much gun! • Keep the antenna cables short

  8. Antenna ChoicesDirectional • Tight beam • Longer range • Cone of signal beam • Ideal for PTP or for clients in PTM Side View Top View

  9. Antenna ChoicesOmni • 360 degree horizontal beam • All round coverage • Thin in the vertical plane • Ideal for Point-to-Multipoint Side View Top View

  10. Antenna ChoicesSector • Wide horizontal beam • Well defined coverage • Thin in the vertical plane • Good gain • Ideal for Point-to-Multipoint Side View Top View

  11. Outdoor Bridging Units • In order to get the best radio signal you should use outdoor radio devices

  12. Choices for 2.4GHz Bridging Units EnGenius 2610 • Built in 10dB directional antenna • External antenna connection • PoE • Compact Design • 108Meg ‘Super G’ • LED signal indicators

  13. A Simple Example • The best way to illustrate setting up a wireless data link is to go over a simple example. • The aim is a data link between two houses a couple of Km apart. • The preferred product is the EOC-2610

  14. Site Installation • Find a Suitable Mounting point • Attach the bridging unit • Run LAN cable • Similar setup for the other end

  15. Configuring the 2610

  16. A Repeating Network • WDS • Wireless Distribution System • Multiple access points • Preserves the MAC addresses of client packets • A station accepts connections from wireless clients and passes them down the line. • All base stations use the same radio channel and security settings. • The repeaters will bridge and accept wireless clients at the same time. • Throughput is halved for each repeater. • Only works with other WDS units. • Roaming

  17. A Repeating Network • Universal Repeater • As the name suggests, should repeat from anything • Each unit is AP + Client • Essentially two networks; different SSID • MAC may not be transparent. • All base stations use the same radio channel and security settings. • The repeaters will bridge and accept wireless clients at the same time. • Throughput is halved for each repeater. • No Roaming

  18. 5GHz networking • Frequency range 5.1 to 5.8GHz • Better non-line-of-site operation – better scatter, and OFDM. • Less affected by water vapour in the air • Higher legal power limits • More secure and less interference • Same functionality as 2.4GHz • Reduced range for same power (vs 2.4GHz)

  19. Three Frequency Bands • Band A - 5150-5350MHz; indoor use • Band B - 5470-5725MHz; indoor or outdoor use • Band C - 5725-5825MHz; outdoor fixed points (only 3 channels)

  20. Band B Frequency Band • IR2006 • 1W EIRP • Fixed or Mobile Wireless Access • License free • DFS and TPC • 11 non-overlapping channels • 1-5Km range

  21. Band C Frequency Band • IR2007 • 4W EIRP, density of 23dBm/MHz • Fixed Wireless Access • A license is required • DFS and TPC • Only channels 149, 153, 157 can be used • 2-10Km range

  22. 8610 Bridging Units • 2 different models: • NOC-8610PLUS with 16dB directional • NOC-8610EXT with antenna connector • IR2007 Band C, licensed • PoE • Compact Design • Multiple Operating Modes

  23. Configuring the 8610

  24. 11n WiFi • MIMO M(tx) x N(rx) antenna • Spatial Multiplexing – Multiple Spatial Streams multiplexed onto single channel split over multiple antenna • Space-Time Block Coding – same stream over several antenna • Transmit Beamforming – signal steering by altering the phase • 40MHz channels • Improved Coding Schemes • Reduced Guide Interval • Block Ack • Frame Aggregation

  25. The MIMO-24JNR-8DB • Dual Polarization 8dBi antenna • Alignment Tools • Passive PoE (24V) • 11n Draft 2.0 • PHY rates up to 300Mbps • True TCP 83Mbps • 7 Operating Modes • Access Point • Client • Wireless Routing Client • Gateway • Wireless Adapter Mode • Transparent Client

  26. MESH Networks • Repeating, radio nodes • Intelligent routing protocols • High degree of redundancy and dynamic routing • Routes between nodes only as desired by originating nodes • Loop-free, self-starting

  27. Advanced Routing • Best route used • Self healing

  28. Typical Applications Anywhere where you have problems with line of site or require a particularly high resilience for clients e.g. • Caravan sites • Villages or communities • Holiday parks • Marinas • etc...

  29. Mesh Nodes • Single Radio • Dual Radio • Different Client/Backhaul • Client 2.4GHz • 5Ghz Backhaul • Layer 2 vs 3 • No IP address • MAC address of WLAN • Supports all layer 3 protocols e.g. IP, DHCP, IPv6, IPX, etc

  30. 8670 Meshing Unit • Dual Radio • Layer 2 Mesh • Self Configuration and Healing • Band C/IR2007 • Multiple SSID • VLAN Pass through • VPN Pass through • PoE

  31. Time for Coffee

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