Mesh Networking and the Broadband-Hamnet
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1 Mesh Networking and the Broadband-Hamnet A overview of today's implementation of an Amateur Radio computer Mesh Network. Bertrand Zauhar, P.Eng. VE2ZAZ September 2014.
2 Today's Program Why an independent network? Important Definitions, Meet the BBHN, Capabilities, Rules and Limitations, How to get going, BBHN router set up, Available Services on BBHN-Ottawa.
3 Why a private Ham Data Network? Emergency readiness. Commercial Networks are unreliable in disaster periods. Community services. For example checkpoint coordination at organized events, video links, Learning experience. Learn and experiment with data networks, microwave propagation, Linux etc. Amateur radio data linking robustness. Improve D-Star, packet, APRS data linking. Spectrum occupancy. Use it or lose it!
4 Important Definitions Data Network: A system of interconnected computer systems, terminals, and other equipment allowing information to be exchanged. Infrastructure mode: A wireless router (joins) a wireless network to a wired network (Internet) while supporting central connection points for local wireless clients. Ad-Hoc mode: Network connections do not require a router or a wireless base station (Peer-to-Peer)
5 Important Definitions (cont.d) Network Topology
6 Important Definitions (cont.d) Mesh Network: A network topology in which each node (called a mesh node) relays data for the network. All nodes cooperate in the distribution of data in the network. Source: withfriendship.com
7 The Broadband-Hamnet (BBHN) A mesh data network: Built utilizing re-purposed commercial hardware flashed with amateur-radio-specific firmware (Linksys WRT54 series, Ubiquity, Raspberry Pi). Regular Ham bands: Wireless links commonly established in the 2.4GHz band, but now also available in the 5.8GHz band. High-speed: 54Mb/s digital data network, using IEEE g on 2.4GHz. Previously known as HSMM: High Speed MultiMedia.
8 The BBHN (cont.d) Self-building & configuring network: Nodes can seamlessly enter & leave network. TCP/IP-based network with automatic DNS: Node names instead of IP addresses. Self-routing: Uses built in link-cost analysis for efficient data transfer. Self-Healing: Traffic is automatically re-routed whenever possible. Uses OLSR: Optimized Link State Routing protocol. Not much for us in there...
9 Rules and Limitations with BBHN Falls under Amateur Radio Service: With limitations set by the service, like high power! Broadcast SSID: Must show callsign (like VE2ZAZ-6) No Encryption: Communications should not be encrypted, same as on any other mode or band. Open to hackers: Those who understand mesh networks and OLSR. Recommended to segregate BBHN from your private home network.
10 How To Get Going? Get Some Hardware: Linksys/Cisco WRT54G/GS/GL router Be aware that some versions of the WRT54G cannot run the BBHN firmware. Read BBHN website for more information. ebay, Kijiji, Amazon. Ubiquiti M2 (2.4GHz) or M5 (5.8GHz) unit. Raspberry Pi and WiFi dongle. Use dongle with Ralink 5370 chipset. Good antenna or pair of antennas. The higher, the better of course. ebay, home-brewed, etc. Some CAT-5 cable. You plan to go up in height, right?
11 How To Get Going?
12 BBHN: Main Screen
13 BBHN: Basic Setup Screen 2
14 BBHN: DHCP & Services Screen
15 BBHN: Mesh Screen
16 BBHN: Mesh Screen
17 VE2ZAZ Pi Server: Home
18 VE2ZAZ Pi Server:
19 VE2ZAZ Pi Server: WebMail
20 VE2ZAZ Pi Server: Live Chat
21 VE2ZAZ Pi Server: Asterisk PBX
22 VE2ZAZ Pi Server: File Repository
23 An Example of BBHN: Austin, TX
24 BBHN in Ottawa YMCA-Ottawa Hub WRT54G One antenna pointed at VA3YH, One antenna is the standard Linksys antenna. Ubiquiti M2 Loco pointed WNW, Ubiquiti M2 Loco pointed SSW, Hull/Gatineau plans, Several individual stations currently active: VE3CVG, VE2ZAZ, VE3IRR, VA3YH, VA3OMP,... We need you onboard!
25 More Info... Broadband-Hamnet Website VA3ODG Bulletin Board (Forum) HSMM-Pi (Raspberry Pi BBHN) Youtube Videos Search for Broadband Hamnet or HSMM
26 Thank You!
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