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Neighborhood Node Developers Program
The Neighborhood Node Network needs developers for node-based applications and service programs. Critical needs are for LAMP familiar software programmers, social service experts, nonprofit admins and property specialists. Interested individuals or groups should contact Dane at the the Neighborhood Node Center in Tempe.
Neighborhood Node Center
230 West Baseline Suite 106
Tempe AZ 85283
480 755-1035
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Disaster Preparedness is important for all Neighborhoods! 
The NNN Channels
will keep your Node live and useful in the event of a natural disaster that breaks the grid |
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Neighborhood Node Network WiFi
Introduction
WiFi, for wireless fidelity, is based on the IEEE 802.11 standards which includes a growing list of sub-versions such as a, b, g, n etc. with each offering advantages for some purposes. Today most consumers use 'b' or 'g' devices which offer speeds comparable to ethernet cable. The biggest advantage is that the standard uses unlicensed RF spectrum similar to baby monitors and cordless phones. This is all made possible by high speed processors and spread spectrum transmission which is tolerant of high levels of traffic within the spectrum bandwidth.
Network topology can vary depending on the network design, for instance, some access points are connected to the network with ethernet cable and others are connected wirelessly. Of those connecting wirelessly, some network access points use the slower (b) radios to connect to users and the faster (g) ones for backhaul (network) connections while other use only a single radio for everything.
Enterprise and WISP topologies devote much effort to security and limit which router can be addressed at which time. These approaches work much like a cabled installation, when you can anticipate traffic from a given location. Efforts to overcome limitations imposed by enterprise-type topologies led to the development of mesh topology, which requires that each access point also be a sophisticated router, like a standard Internet node. The extra expense of mesh is compensated for by the fact that they are able to automatically position themselves in the network and the network automatically adjusts when an access point goes offline. Mesh saves labor because you just add electricity and the node works.
The Neighborhood Node Network is based on mesh networking technology, which is ideal for ad hoc networks because it is self-organizing and self-healing. When your node is part of a mesh it communicates with all the nearby nodes and makes intelligent choices about paths and packet routing. This means that your file transfers can use whatever route or routes are best, including the ability to send your files through multiple neighbors landline connections , making it much faster than a single landline connection This also means that you will not need a landline connection to the Internet if your neighbor has one.
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In a mesh the coverage overlaps allowing each router to shoose from several connections. |
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However the simple math of using your neighbors connection for Internet access means that effective radio throughput is reduced by half for each 'hop', because it must process each message twice, to recieve it and to send it. Thus multiple hops slow radio traffic noticeably.
But the good news is that transfer at 54mbs is fast enough to endure several reductions by half before it is too slow to compete with dial up. Even with four hops there is still sufficient speed to make it worthwhile for most web surfing. |
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Copyright 2006 © Dane Arr Contact Webmaster with any questions about this site |
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Industrial versus Information
Economy
Neighborhood Node Links to Related Sites |
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Useful Offsite Links
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Mesh Links
Being Wireless
Nicholas Negroponte explains why Wi-Fi "lily pads and frogs" will transform the future of wireless
BroadVoice WiSIP phone that is optimized for use with BroadVoice service.
WiFi VOIP and the Last Arbitrage When you can make an end-to-end call most anywhere-to-anywhere for practically free, it changes everything
The Champaign-Urbana Community Wireless Network (CUWiN) is developing an open source, turnkey wireless networking solution that exceeds the functionality of many proprietary systems. CUWiN's software will share connectivity across the network, allowing users to buy bandwidth in bulk and benefit from the cost savings. CUWiN networks are self-configuring and self-healing -- so adding new wireless nodes is hassle-free, and the system automatically adapts to the loss of an existing node. And, because CUWiN networks are completely ad-hoc, there's no need for expensive central servers or specialized administration equipment.
Become_a_wireless_isp for 300£ While the learned are laughing at Negroponte's fantastic "futuristic" vision of a mesh of interconnected wireless LANs "like lilypads which you hop from one to another" a UK company has produced Mesh wireless technology which you can buy and install, today, for under £300.
Meshcube.org The 4G AccessCube is a new hardware platform dedicated to WirelessLan MeshRouting, developed by 4G Systems, Hamburg, Germany. With a 400MHz MIPS processor, 64MB RAM, 32MB flash and up to 8 MiniPci cards, it is powerful enough to provide excellent security and encryption, and flexible enough for custom applications and modifications. See section HardWare for more details about the hardware.
O'Reilly on Wireless Mesh
Community Wireless is an umbrella organization - representing the needs of the emerging community networks
The Little Engine That Could How Linux is Inadvertently Poised to Remake the Telephone and Internet Markets
David S. Isenberg Packet Relay Radio to the Rescue
March 17, 2002
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