- Cisco Network Router User's Manual

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CiscoAironetAccessPointDeploymentGuide 

CiscoSystems

Page44of52

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Note:Inordertobeamformtoclientsusingthreespatialstreams,sincethreetransmittersare

used in the transmissions, the AP needs at least one additional radio to beamform. The AP

3600hasfourradiosperbandandcanbeamformtoclientsusingthreespatialstreams.

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To summarize, ClientLink

2.0 takes the received signals heard from the client on the uplink and

calculates how the multipath signal looked from those streams. Then, on the reciprocal side (transmit

downlink),ClientLink 2.0usesall fourradiosto figure outtheoptimal waytoformthesignal (transmit

beamforming) to enable the client

 to best decode (receive the signal on the downlink) with the least

amountofretries.

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ClientLink2.0with anAP3 600enablesbeamformingtoall802.11nclients,including3SSclients,andcan

dosoforupto128clientsatatime.TheAP 1600supportsfewerclients(32)and

doesnotsupport3SS.

ClientLink 1.0 supported a  maximum of 15 clients at a time. ClientLink 2.0 significantly improves

throughput and coverage up to 60% on the downlink side for much better 802.11n client connectivity

andforenhancingtheBringYourOwnDevice(BYOD)experience.

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FormoreinformationonCiscoClientLink

2.0,refertothefollowingURL:

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http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps11983/at_a_glance_c45‐691984.pdf

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SiteSurveyConsiderations

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While ClientLink dynamically beamforms and helps to maintain a robust signal, which results in fewer

retries,itwasnotdesignedtochange thecellrange.ClientLinkcreates abetterconnectionexperience,

notalargercellsize.

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For this reason, during a site survey, it is important to keep in mind

that the AP 3600 cell sizes are

generallythesameorverysimilartootherCiscoaccesspoints.Figure58depictstypicalrangesinthe1‐

54 Mbps range. While Cisco always  recommends that you survey with the equipment you intend to

deploy, an earlier survey done with an AP 3500,

 for example,  would not be invalid for an AP 3600

deployment. Figures 59 and 60 provide examples of the modulation types and signal‐to‐noise ratio

(SNR).

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