Wha What is an A t is an AREDN M REDN Mesh esh Ne Network! ork! - PowerPoint PPT Presentation

Wha What is an A t is an AREDN M REDN Mesh esh Ne Network! ork! Bob Nobis – N7RJN Tri-City ARA – March 19, 2018

The AREDN™ Proje ject’s focus is Eme mergency Commu mmunications (EmC mComm mm). It seek ). It seeks s to provide hams ms a me means to imp mpleme ment this technology in practical wa ways to support local and regional eme mergency commu mmunications needs.

Types of network T opography

• The internet is fault tolerant! If one path goes down there is another path.

an adhoc wirel es s mesh routing daemon W hat is OLSR ? The Optimized Link State Routing protocol (OLSR) is a routing protocol that is optim ised for mobile ad-hoc netw orks but can also be used on other wireless ad-hoc networks. It is a proactive link-state routing protocol that floods a topology table of it's neighbors to all nodes in the network which then compute optimal for w arding paths locally.

Spectrum Allocations Multiple band plans EXIST ! • 13 Centimeters Band 2.4 GHz (2300-2310 and 2390-2450 MHz) • 10cm Centimeters Band 3.4 GHz (3300-3500 MHz) • 5cm Centimeters Band 5.8 GHz (5650.0-5925.0 MHz) http://www.arrl.org/band-plan

2.4 GHz and 3.4 GHz NOTE Broadband Modes, 2410.000-2450.000, 22 MHz max. Broadband segment may be used for any combination of high-speed data (e.g. 802.11 protocols), Amateur Television and other high-bandwidth activities. Division into channels and/or separation of uses within this segment may be done regionally based on needs and usage.

5.8 GHz (5,650.0 - 5,925.0 MHz) Broadband segment may be used for any combination of high-speed data (eg: 802.11 protocols), Amateur T elevision and other high-bandwidth activities. Division into channels and/or separation of uses within this segment may be done regionally based on needs and usage.

Applications That Can Run On Mesh • ANY program that runs on a TCP/IP network • (exceptions: Bandwidth of the RFlink, Multicast traffic, internet access) • VOIP PBXs (RPi image) • IRLP, Echolink • IP cameras (bandwidth allowing) • Mesh Chat (web based group text chat that runs on the node or RPi) • Ham chat (web page that runs on the node) • APRS • Incident command tickets • Software defined Radios RX/TX • Map cashing

Ubiquiti Hardware Used To Build A Mesh

Supported Platform Matrix

AREDN Status Window

AREDN Setup Window

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AL7MH Portable Mesh Node (continued)

Google Earth AL7MH to N7RJN

AirLink https://airlink.ubnt.com/#/

Metro-Phoenix AREDN Nodes

Microwave Propagation • LOS Line Of Sight & reflections off large surfaces like Buildings! • Directional Antennas with GAIN!!!! With more gain comes a directional pattern with noise rejection.

Cable • Cat6 utp (unshielded twisted pair w/ crosstalk protection) • Cat5e / Cat6a is ANSI/TIA-568-C.1 (crosstalk protection, unshielded) • Cate 7a (Crosstalk and EMI protection w/ Overall Cable Shield ) • Shielded connectors • Nodes shielded (Titanium models) • Near field antenna separation.

Power Over Ethernet (PoE)

Directional High Gain Antennas Ubiquity has great self-contained panel antennas. Nanostation Loco : sector coverage, low gain antenna. Nano Stations : sector antenna, ~ 11dbi of gain NanoBridge : Beam antenna ~ 18dbi of gain Rockets allows you to pick the antenna that your site needs, it will cost you a bit more.

AL7MH-N7RJN Experimentation & Testing • Do some range testing - how far can nodes be separated and still carry traffic? • Get email working - Winlink Express • IP Video • Internet connection across an amateur radio mesh network. • Internet tunneling • VOIP • File transfer • Wifi Scan

Questions The AREDN web site has extensive documentation and a user forum https://www.aredn.org