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Ruckus WiFi Evaluation

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communication from G5 to AirPort Express via the Ruckus WiFi hardware via. an AirPort Extreme base station and related variations. ...

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Ruckus WiFi EvaluationPage 1 1 Ruckus WiFi EvaluationStuart Cheshire B.A. M.A. M.Sc. Ph.D.<publicationsnospam@nospamstuartch eshire.org>23rdApril 2006Revised 29thDecember 2006IntroductionAccording to Ruckus Wireless higher transmission power and intelligent use of a sixelement antenna array give their MF2900 (base station) and MF2501 (client) 802.11g wireless devices superior performance compared to existing 802.11gproducts. By individually enabling or disabling each element independently thedevice has 63 different softwarecontrollable antenna configurations any one of which may be the best under a given set of circumstances. For example powering two adjacent elements simultaneously has the effect of forming a directional beam giving increased range in that direction and increased noiserejection of signals from other directions.I discovered that the Ruckus devices do indeed achieve superior performance inthree areas:1. Increased range.2. Increased throughput at any given range.3. More consistent throughput.In my mind it is the third aspect more consistent throughput that is the mostsignificant benefit for audio video and other modern applications. Most of todays WiFi devices exhibit pretty variable throughput. Over the course of a minute their throughput can fluctuate fairly dramatically as environmentalconditions change such as people and pets moving around or interference from cordless telephones and microwave ovens. This variability can be problematic forplayback of timebased media such as audio and video. While lulls in networkthroughput can be survived by the use of sufficient buffering at the playbackend large buffers are undesirable both because they increase hardware cost andbecause they result in less responsive user interaction.By switching antenna configuration several times per second in conjunction withtechniques to monitor how well the wireless link is performing from moment tomoment in terms of applicationlayer traffic Ruckus devices are able to ...

Source: www.stuartcheshire.org

 

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