User's Guide

Wireless Array
ii
About this User’s Guide ........................................................................................ 21
Organization .................................................................................................... 21
Notes and Cautions ........................................................................................ 23
Screen Images .................................................................................................. 23
Product Specifications ........................................................................................... 24
Installing the Wireless Array........................................................... 25
Installation Prerequisites ...................................................................................... 25
Optional Network Components ................................................................... 27
Client Requirements ....................................................................................... 27
Planning Your Installation .................................................................................... 28
General Deployment Considerations .......................................................... 28
Coverage and Capacity Planning ................................................................. 30
Placement .................................................................................................. 30
RF Patterns ................................................................................................ 31
Capacity and Cell Sizes ........................................................................... 32
Fine Tuning Cell Sizes ............................................................................. 33
Roaming Considerations ........................................................................ 34
Allocating Channels ................................................................................ 34
IEEE 802.11n Deployment Considerations ................................................. 37
MIMO (Multiple-In Multiple-Out) ........................................................ 38
Multiple Data Streams — Spatial Multiplexing ................................... 39
Channel Bonding ..................................................................................... 40
Improved MAC Throughput ................................................................. 41
Short Guard Interval ............................................................................... 41
Obtaining Higher Data Rates ................................................................. 42
802.11n Capacity ...................................................................................... 43
Failover Planning ............................................................................................ 43
Switch Failover Protection ..................................................................... 45
Power Planning ............................................................................................... 46
Power over Gigabit Ethernet ................................................................. 46
Security Planning ............................................................................................ 47
Wireless Encryption ................................................................................ 47
Authentication ......................................................................................... 47
Port Requirements .......................................................................................... 49
Network Management Planning .................................................................. 53
WDS Planning ................................................................................................. 54