Hardware and Software Specifications,
Examples, Links, and other info. are valid at the publishing time. In case it become invalid use the Internet Search.
1st Published, April 2005
Hit Site Wide in 2006
Wireless Bandwidth (Speed) and Latency
Wireless Network uses Transmitted
signal rather then Wire (CAT5e/CAT6). There are few parameters that are affecting Wireless Network communication that are not an
issue when using Wired Network. The two most important variables are Signal Strength, Signal Stability.
Signal Strength is mainly depending
on the Distance and the number and nature of obstructions. Stability is affected by the presence of other signals in the air +
temporal changes in the envioroment. As an example Computer movement and orientation, people movement, electrical appliances
“kinking in and out”, and other interferences are constantly changing and affecting the signal in a temporal manner.
The general results are that
Wireless Bandwidth (Speed) and Latency becomes “None Stop” changeable variables.
Wireless Bandwidth (or “Speed”) of
Wireless depends on what standard you use (802.11b. 802.11g, etc.) and how much of the signal is available for processing. The
smaller the signal the less bandwidth you get.
Latency is created by the constant need to add extra processing to the signal in order to compensate for the instability. Latency
per se is not created by obstructions; the Radio signal travels in the speed of light no matter what. Latency is a matter of
timing that depends more on the Hardware, and the processing that is performed on the signal by both the hardware and software.
If you make it your business to have a Clean Stable signal Latency would be reduced to minimum but it would always more than a
Clean Signal is not necessarily Strong signal but rather the best Signal to Noise Ration (SNR)
that can be achieved.
Unfortunately the Green Bars of the signal strength provided by most Wireless Utilities
it is more of a Gimmick rather then a Technical tool. It shows the actual 802.11x signal + Phone + Microwaves + Brain emissions,
in other words the “Bars” provide a visual representation of all the 2.4GHz in the atmosphere around them.
The real measure of Wireless signal capacity is Signal to Noise Ratio (SNR), a measure that takes into consideration the relevant
Signal adjusted to the Noise Level.
In addition without special pro tools it is hard to identify and eliminate noise, thus the way to neutralize the noise and improve SNR is to get
strong signal while the source and the client are physically as close as possible.
Functionally it means
that if you experience Latency problems ignore the
Signal Strength Bar and improve your Signal Strength (as though you have only two bars).
Doing so might cost more money, but there is not really another way.
The following links describe variety of ways to achieve better signal.