Sustainable Wireless Network
posted by Mikko1 on 11 March 2008 15:29
Problem context :
The current, pulsed WiFi-technology creates quite a lot electrosmog. Therefore, there is a need for less radiating wireless technology, especially in homes and schools. Additionally the pulsed transmission of WiFi may irritate human cells more than non-pulsed (like FM radio signal) [1,6].
When I measured a wireless access point [AP] with a radiation metering instrument,the AP created about 2300 uW/m2 peak values from one meters distance. Similarly, a laptop PC with WiFi enabled created 450 uW/m2 peak values. More exact figures in reference [2]. These electrosmog values can be considered high [3-8] . A more sustainable solution is requested.
Additional information:
[1] 'Bioinitiative: A Rationale for a Biologically-Based Public
Exposure Standard for Electromagnetic Fields'
http://www.bioinitiative.org/report/index.htm
Summary, pages 23 ja 24.
[2] Moser, M. (2005) Development of Procedures for the Assessment of
Human Exposure to EMF from Wireless Devices in Home and Office
Environments. Zürich, Switzerland: IT IS Foundation ETH Zurich.
http://www.bag.admin.ch/themen/strahlung/00053/00673/03571/index.html?lang=fr&download=M3wBPgDB/8ull6Du36WenojQ1NTTjaXZnqWfVp7Yhmfhnapmmc7Zi6rZnqCkkIN0fHaCbKbXrZ6lhuDZz8mMps2gpKfo
[3] "However if you put a laptop straight on your lap and are using
wi-fi, you could be around 2cms from the transmitter, and receiving
comparable exposure to that from a mobile phone."
Challis, L. (2007) Mobile Telecommunications and Health Research
Programme. A Report of UK Health Protection Agency.
Pages 31-35, Summary:
http://www.mthr.org.uk/documents/MTHR_report_2007.pdf
[4] Recommended radiation values from Germany - Baubiologische Richtwerte:
http://www.maes.de/RICHTWER.pdf
[5] BBC Panorama - WiFi a Warning Signal
http://news.bbc.co.uk/1/hi/programmes/panorama/6674675.stm
Be critical in watching, still listen to Sir William
Stewart's comments about WLANs:
http://video.google.com/videoplay?docid=2243482823849327978
[6] Havas, M. (2007) San Francisco EarthLink Wi-Fi Network. A Report.
Be selective in reading, still check out those charts and references :
http://www.powerwatch.org.uk/reports/20061232_havas.pdf
[7] Paris has closed WLANs:
http://derstandard.at/?url=/?id=3140155 http://www.lefigaro.fr/flash-actu/2007/11/30/01011-20071130FILWWW00516-paris-pas-de-wifi-dans-les-bibliotheques-.php
[8] WLAN-Funkanlagen:
http://www.oekotest.de/cgi/ot/otgs.cgi?suchtext=&doc=28851&pos=0&splits=0:1639:2661:4163:6424:6745
Proposed Solution :
The Sustainable Wireless Network could be based on following elements:
- Constant (non-pulsed) transmission in analog or digital format
- The access point (AP) and the device(s) should have compressor (packing and unpacking of data) in software or hardware. This is meant to minimise the amount of data transfered between AP and device.
- The frequency(ies) in use should not be risky ( https://www.who.int/peh-emf/project/mapnatreps/Russia_2007_EMF_activity_report.pdf , page 2) or reserved by other networks.
- The range around AP should be at least 20 meters
- The Wiress Access point should have an ability to measure the distance to devices and adjust power respectively
- Similarly, the device should have the capability to adjust the power based on the distance to the access point. Example:
http://www.orchid-electronics.com/dectphones/lowradiationdect.htm
- The electrosmog from AP should be below 100 uW/m2, measured from one meters distance
- The system should have industry-strenght encryption of data
Now, Questions for You:
- Do you know existing standards that can help in defining this kind of system?
- Are you familiar with ready-made components that could be integrated to create an above mentioned design?
- Are there datacard (PCMCIA) or UBS manufacturers with applicable chip sets/products?
- How would you diminish the amount of electrosmog (peak values <100 uW/m2)
- How would you solve the data security in this case?
- Any other suggestions?
Thanks in Advance :-) Mikko
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