Mesh/14 February 2013

Introduction

• Applying for funding from OpenITP: https://pad.riseup.net/p/510penITPapp
• Wikipedia has some good info here.
• See also: Mesh Projects Directory - http://wiki.tidepools.co/view/Mesh_Directory

Inventory

at sudo room

• Lots of coaxial cable.
• Some wireless routers that need to be checked for openwrt support.
• 2 linksys routers which may be b0rked

juul

• One Motorola C155 with osmocom-bb
• One USRP 1 software defined radio

WBX 50-2200 Mhz rx/tx

RFX2400 2.3-2.9 Ghz rx/tx

mark

• Three openwrt routers from open-mesh.com.

hardware

RONJA laser link

The RONJA project has 1.4 km range and 10 mbps full duplex. Material costs are about $100, but it's not clear if that is per node or per link (per two nodes). It does not use off-the-shelf hardware, so construction requires some work.

wifi routers

• Ubiquity nanostation
• Ubiquity picostation
• raspberry pi (or similar) + usb wifi adapters such as the 2000 mW $20 chinese models or even just 500 mW $20 chinese models

antennas

• [http://dx.com/p/2-4ghz-100w-18dbi-directional-high-gain-18-unit-antenna-for-wifi-wireless-network-sma-34759 18 dBi -directional-high-gain-18-unit-antenna-for-wifi-wireless-network-sma-34759 18 dBi for $18 including shipping.

= parabolic

24 dBi for $26.40 expensive shipping when ordering only one though.

Firmware and routing algorithms

• Should we use off the shelf firmware, how should we r00t our r0uters?
• Commotion wireless uses OLSR, but the current nodes in the 510pen network use the batman-advanced.
• Other projects like Project Byzantium (targetting laptops) use the Babel protocol.
• Performance Evaluation of BATMAN, DSR, OLSR Routing Protocols - A Review Sandhu and Sharma 2012: http://www.ijetae.com/files/Volume2Issue1/IJETAE_0112_35.pdf

Maximum Number of nodes with Maximum Mobility: OLSR > BATMAN > DSR

Maximum Number of nodes with Maximum Packet length: OLSR > DSR > BATMAN

Currently, 510pen uses NG firmware extending OpenWRT with batman-adv

• OLSRD Configuration & Management: https://code.commotionwireless.net/projecthttp://www.olsr.org/?q=node/13s/commotion/wiki/OLSR_Configuration_and_Management?version=3

Action Items

• Bill will look into OLSR and routing generally
• Saturday node-repair field trip
  • jenny will ping beau
• Bring things to set up a node at sudo room next week!
  • jenny will ping mark b :P