Installation guide

In summary, ClientLink 2.0 takes the received signals heard from the client on the uplink, calculates how the
multipath signal looked from those streams, and then on the reciprocal side (transmit downlink) figures out
the optimal way using all four radios to best form the signal (transmit beamforming) to enable the client to
best decode (receive the signal on the downlink) with the least amount of retries.
ClientLink 2.0 enables beamforming to all 802.11n clients, including 3SS clients, and can do so for up to 128
clients at a time. 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 a much better 802.11n client
connectivity and enhancing the Bring Your Own Device (BYOD) experience. For more information on Cisco
ClientLink 2.0, refer to Cisco Wireless ClientLink 2.0 Technology.
Site Survey Considerations
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 larger cell
size.
For this reason, when conducting a survey keep in mind that the AP 3600 cell sizes are generally the same or
similar to other Cisco APs. Figure 36 depicts typical ranges in the 1−54 Mbps range.While it is always
recommended to survey with the equipment you intend to deploy, a previous survey done with an AP 3500,
for example, would not be invalid for an AP 3600 deployment. Figures 37 and 38 provide examples of the
modulation types and signal−to−noise ratio (SNR).
Figure 36  AP 3600 Site Survey Ranges (typical cell sizes have not changed; AP 3500 and AP 3600 cell
sizes are the same)
Figure 37  Site Survey Sensitivity and SNR