Cisco Mesh Access Points User Manual

This section contains link budget analysis for AP to Client in the 2.4-GHz band. In this analysis, the focus is
on the system gain for upstream and downstream. Ideally, the link should be balanced for upstream and
downstream, but practically it may not happen. Therefore, the decision factor for the cell radius will be the
lowest of both upstream and downstream.
For AP to client link budget in 2.4 GHz, let us assume a client Tx power of 20 dB and an antenna gain of 0
dBi.
For -E domain, the EIRP limit is 20 dBm for the 2.4-GHz band and 30 dBm for the 5-GHz band.
Table 26: Outdoor 11n AP-to-Client, at 2.4 GHz: 9 Mbps Data Rate (-E domain)
CommentsCisco 1552 E/HCisco 1552 I/CParameter
USDSUSDS
Composite power at 9 Mbps,
20 MHz bandwidth
20 dBm
(Client)
13 dBm
(AP)
20 dBm
(Client)
15 dBm
(AP)
Tx Power Conducted
0 dBi
(Client)
4 dBi
(AP)
0 dBi
(Client)
2 dBi
(AP)
Tx Antenna Gain
Legacy Rate ClientLink.
Helps only in DS.
0 dB
(Client)
3 dB
(AP)
0 dB
(Client)
3 dB
(AP)
Tx Beamforming (BF)
20 dBm20 dBm20 dBm20 dBmTx EIRP
4 dBi
(AP)
0 dBi
(Client)
2 dBi
(AP)
0 dBi
(Client)
Rx Antenna Gain
Includes 4.7 dB MRC gain for
AP1552
–94 dBm
(AP)
–91 dBm
(Client)
–94 dBm
(AP)
–91 dBm
(Client)
Rx Sensitivity
118 dB111 dB116 dB111 dBSystem Gain
LOS, PLE = 2.5 (5 dB fade
margin)
173 meters
(567 feet)
173 meters
(567 feet)
Range (AP to Client)
The AP to client link budget in the 2.4-GHz band on the -E domain is limited by downstream. Therefore,
downstream has a lower system gain. Thus, the decision factor will be downstream.
Cell sizes for AP to Client in 2.4 GHz for different AP1552 models can be decided by picking the lowest of
the following two:
• AP to Client distance in 2.4 GHz band (from Table 26: Outdoor 11n AP-to-Client, at 2.4 GHz: 9 Mbps
Data Rate (-E domain), on page 82)
• Half of the distance between AP to AP on 5 GHz backhaul (from Table 25: AP to AP RF Link Budget,
5.6 GHz: 9 Mbps (-E domain), on page 81)
Cisco Mesh Access Points, Design and Deployment Guide, Release 7.3
82 OL-27593-01
Site Preparation and Planning
Cell Planning and Distance

Cisco Mesh Access Points Specifications

General

Brand	Cisco
Model	Mesh Access Points
Category	Wireless Access Point
Language	English