What is an AREDN Mesh Network! Bob Nobis N7RJN Tri-City ARA March 19, 2018

Transcription

1 What is an AREDN Mesh Network! Bob Nobis N7RJN Tri-City ARA March 19, 2018

2 The AREDN Project s focus is Emergency Communications (EmComm). It seeks to provide hams a means to implement this technology in practical ways to support local and regional emergency communications needs.

3 Types of network Topography

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

5 an adhoc wirel es s mesh routi ng 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.

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7 Spectrum Allocations Multiple band plans EXIST! 13 Centimeters Band 2.4 GHz ( and MHz) 10cm Centimeters Band 3.4 GHz ( MHz) 5cm Centimeters Band 5.8 GHz ( MHz)

8 2.4 GHz and 3.4 GHz NOTE Broadband Modes, , 22 MHz max. Broadband segment may be used for any combination of high-speed data (e.g 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.

9 5.8 GHz (5, ,925.0 MHz) Broadband segment may be used for any combination of high-speed data (eg: 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.

10 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

11 Ubiquiti Hardware Used To Build A Mesh

12 Supported Platform Matrix

13 AREDN Status Window

14 AREDN Setup Window

15 AL7MH Portable Mesh Node

16 AL7MH Portable Mesh Node (continued)

17 Google Earth AL7MH to N7RJN

18 AirLink

19 Metro-Phoenix AREDN Nodes

20 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.

21 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.

22 Power Over Ethernet (PoE)

23 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.

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

25 Questions The AREDN web site has extensive documentation and a user forum