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Village Telco & Mesh WIFI Networks 101Carlo Nizeti - VK2MXC
Glen Steedman - VK2FWOO
Saturday, 9 March 13
Saturday, 9 March 13
The low down...The Challenge
The Answer (Wifi Mesh goodness)
Hardware Spec
Software Spec (Batman, Asterisk, dd-wrt)
Field Testing results
Reference Architecture
Global Deployments
Demo Time
Saturday, 9 March 13
In Africa the average person spends more than 50% of their disposable income on mobile services.
The rapid spread of mobile phones is remarkable. However in many parts of the world high call costs mean that people have to make hard choices about when to use the phone.
Saturday, 9 March 13
The Challenge
For millions affordable access to communications remains elusive either because they live in remote areas where mobile telecommunication operators have not reached or because the available access is too expensive.
Open Source telephony software combined with the latest wireless networking technology creates the potential for people to operate their own community phone systems. While designed for the developing world, the Village Telco has application anywhere where people wish to take control of their own telephone infrastructure.
Saturday, 9 March 13
Limited spectrum combined with a monopoly on communications mean poor service and high cost.
No room for new players, no room for new services.
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Yay for WIFIFree Spectrum
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Hacking HardwareIt’s amazing what you can do with a wifi router, a pringles can and too much time on your hands...
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The design challengeProvide telephony capabilities over wifi.
Cheap
Open Standards
Tough!
Quick & Easy Deployment.
Able to be used to deliver data and voice.
Can gateway to PSTN
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+=
The hardware
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The Mesh Potato combines the features of an 802.11bg WiFi router with an Analog telephone
Adaptor (ATA). Each Mesh Potato provides a single fixed telephone line to the end user, and is
connected to other Mesh Potatoes via a mesh Wifi network.
Mesh Potatoes automatically configure themselves to build a mesh Wifi network, greatly extending the
range of the network over regular WiFi.
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Not Your Average Wifi Device Outdoor Ready Weatherised UV Protected Sealed Unit Tough
Capable of surviving line spike, brownouts, power surges.
Flexible Accepts 9-40V Can be powered via phone or data line
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Hardware SpecAtheros AR2317 system on a Chip (SoC)
Silicon labs FXS port chipset
MIPS 4k processor 180 MHz
8 MByte Serial Flash EEPROM
16 MByte RAM
802.11 b/g wifi with EIRP power: 1-24 Mbit 20dBm or 36-54 Mbit 17dBm
Antenna Type : Internal Omnidirectional PCB Antenna
LAN Port : 1 x RJ-45
FXS Port : 1 x RJ-11
Linux kernel 2.26.3
OpenWRT Kamikaze (customised version)
B.A.T.M.A.N. mesh routing daemon Version 0.3
Asterisk 1.4.11
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Power Type : wide range, protected DC port
Power Options:
AC Adpator
PoE (Power over Ethernet)
PoTL (Power over Telephone Line)
DC Input Voltage : 9-40 VDC
DC Input Power : 2.5W DC nominal
Protected Ports: DC, RJ11 phone , RJ45 Ethernet
Protection: over-voltage, reverse DC, nearby lightning, static electricity
Tough!
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OpenWrt LinuxOpenWrt is a Linux distribution for embedded devices.• Commonly used on commodity WIFI
Routers.
• Low memory and CPU requirement.
• Well supported.
Saturday, 9 March 13
B.A.T.M.A.N.“Better Approach To Mobile Adhoc Networking”• B.A.T.M.A.N. is a routing protocol for multi-hop ad-hoc mesh networks.
• Can be described as a “LAYER 2” routing system.
• The individual node only saves information about the “direction” it received data from and sends its data accordingly. Hereby the data gets passed on from node to node and packets get individual, dynamically created routes.
A network of collective intelligence is created.
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Why B.A.T.M.A.N is awesome!
Protocol Agnostic (IPv4 / IPv6 / IPX / Appletalk...)
Devices don't even need an IP Address.
Clients can roam.
Self building, healing and scaling.
Can have a gateway nominated to get out of the mesh.
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AsteriskAsterisk is like a box of Legos for people who want to create communications applications.
It includes all the building blocks needed to create a PBX, an IVR system, a conference bridge and virtually any other communications app you can imagine.
Your IP address becomes your phone
number.
Fully configurable using the handset.
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Mesh Potato Installation
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Saturday, 9 March 13
Performance!Pushing the limits
Goals
1. Test running from battery.
2. See how far we can push wifi signal.
3. See what throughput we can get from stock unit (no
external antenna).
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Dee Why
Long Reef
Collaroy
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Saturday, 9 March 13
In the real world...More than 3 units would be deployed giving the
mesh survivability and higher bandwidth.
Distances would be shorter, or external antennas could be used.
Further testing planned now that we have 5 units. :)
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Futures
Saturday, 9 March 13
DeploymentsIbadan, NigeriaFusagasugá, ColombiaOrocovis, Puerto RicoKranshoek, South AfricaBo-kaap, Cape Town, South AfricaDili, East TimorPiracanga, Bahia, Brazil
Text
We are looking for a
not for profit or community in Australia who could benefit!
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Demo time!
Saturday, 9 March 13
