Category Archives: Networking

Issues and news relating to networking.

IEEE 802.22

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IEEE 802.22 – Wikipedia, the free encyclopedia.

IEEE 802.22 is a standard for Wireless Regional Area Network (WRAN) using white spaces in the TV frequency spectrum.[1] The development of the IEEE 802.22 WRAN standard is aimed at using cognitive radio (CR) techniques to allow sharing of geographically unused spectrum allocated to the Television Broadcast Service, on a non-interfering basis, to bring broadband access to hard-to-reach, low population density areas, typical of rural environments, and is therefore timely and has the potential for a wide applicability worldwide. It is the first worldwide effort to define a standardized air interface based on CR techniques for the opportunistic use of TV bands on a non-interfering basis.

IEEE 802.22 WRANs are designed to operate in the TV broadcast bands while assuring that no harmful interference is caused to the incumbent operation, i.e., digital TV and analog TV broadcasting, and low power licensed devices such as wireless microphones.[2][3][4] The standard was expected to be finalized in Q1 2010, but was finally published in July 2011.[5]

‘Super Wi-Fi’: Super, But Not Wi-Fi

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That’s in part because for now, at least, you can’t move a white-space device around. You can’t put a white-space radio into a phone or laptop because each white-space device must check its location against a database to determine which TV channels and wireless microphones are being used in the device’s area, so they can avoid those channels.

via ‘Super Wi-Fi’: Super, But Not Wi-Fi | News & Opinion | PCMag.com.

That may change a few years down the road, when “personal/portable” white space devices appear. Based on the 802.22 standard, these will be chips able to fit into laptops and tablets, with software that can “sense” clear frequencies as they move around.

Linux Network Configuration

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This Linux tutorial covers TCP/IP networking, network administration and system configuration basics. Linux can support multiple network devices. The device names are numbered and begin at zero and count upwards. For example, a computer running two ethernet cards will have two devices labeled /dev/eth0 and /dev/eth1. Linux network configuration, management, monitoring and system tools are covered in this tutorial.

via Linux Network Configuration.

First ‘Super Wi-Fi’ network goes live in North Carolina

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“Super Wi-Fi” is essentially a buzzword created by the FCC to describe mobile data networks that run over the white spaces spectrum. The spectrum band’s low frequency allows for signals to travel farther and penetrate more walls than traditional Wi-Fi networks.

via First ‘Super Wi-Fi’ network goes live in North Carolina.

The debate over white spaces has been a contentious one, with tech companies such as Google and Microsoft pitted against all the major broadcasting companies, as well as major telecom carriers such as Verizon. Proponents of unlicensed white space use have often argued that opening up the spectrum would help bring mobile broadband to underserved regions and would help close the so-called “digital divide” between many urban and rural areas in the United States. On the other side, the National Association of Broadcasters has argued that mobile Internet devices cannot operate on unlicensed spectrum without clashing with broadcasts on nearby frequencies.

Congrats North Carolina!

Google works on Internet standards with TCP proposals, SPDY standardization

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Google’s focus is on reducing latency between client machines and servers, and in particular, reducing the number of round trips (either client to server and back to client, or vice versa) required. When data is sent over a TCP connection, its receipt must be acknowledged by the receiving end. The sending end can only send a certain number of packets before it must wait for an acknowledgement. The time taken to receive an acknowledged is governed by the round-trip time (RTT). With high bandwidth, high latency connections, clients and servers can end up spending most of their time waiting for acknowledgements, rather than sending packets.

via Google works on Internet standards with TCP proposals, SPDY standardization.

More far-reaching than these SSL tweaks is Google’s proposed alternative to the HTTP protocol that underpins the Web: SPDY.

Dirt Simple Wi-Fi Signal Booster for Free

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Dirt Simple Wi-Fi Signal Booster for Free | Hack N Mod.

You can make this wi-fi parabolic antenna for your router without breaking a sweat.

  • Manila file folders
  • EZ-12 Templates for the antenna from Freeantennas.com
  • Adhesive
  • Aluminum foil

The parabolic antenna is nothing but a focusing device cut out from the stiff manila folder and backed by a layer of aluminum foil on the back for the reflective surface. The exact cutting pattern is aided by the EZ-12 template.

Click here for templates.

How To Build an Open Source Wi-Fi HotSpot with DD-WRT

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If you’ve ever tried to set up a Wi-Fi HotSpot, you may have already discovered that you need more than a broadband Internet connection and wireless router or access point. Off-the-shelf routers and APs don’t provide the “captive portal” function needed to either authenticate users or just let them know who to thank for their free connection. Nor do they usually provide other features such as billing support, bandwidth limiting and user isolation. To obtain hotspot-specific features and capabilities, you must use a device commonly referred to as a hotspot gateway.

via How To Build an Open Source Wi-Fi HotSpot with DD-WRT – SmallNetBuilder.

Coova :: Open Source Captive Portal Access Controller and RADIUS Software

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CoovaChilli is an open-source software access controller for captive portal (UAM) and 802.1X access provisioning, based on the popular (but now defunct) ChilliSpot project, and is actively maintained by an original ChilliSpot contributor. CoovaChilli is released under the GNU General Public License (GPL). Contact us for commercial support and licensing options.

via Coova :: Open Source Captive Portal Access Controller and RADIUS Software |.

ChilliSpot

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ChilliSpot – Wikipedia, the free encyclopedia.

ChilliSpot is an open source captive portal or wireless LAN access point controller. It is used for authenticating users of a wireless LAN. It supports web based login, which is today’s standard for public HotSpots, WISP “smart-client” authentication, and it supports Wi-Fi Protected Access (WPA and WPA2). Authentication, authorization and accounting (AAA protocol) is handled via RADIUS (on board or remote).

Captive Portal – DD-WRT

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List of Chillispot Service Providers (CSPs)

A hosted Chillispot portal can be used to speed-up HotSpot setup and Management, and ease payment and other back-end requirements. Only a DD-WRT Device is necessary, the rest is done by third parties listed below.
Disclaimer: NONE of the following links are endorsements. You are Entirely Responsible Solely for your Choices.

Captive Portal – DD-WRT Wiki.