Xirrus XR-1220, Руководство пользователя

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Wireless Array
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Hyperlinks ....................................................................................................... 19
Product Specifications — XR Array Family ........................................................ 20
Installing the Wireless Array........................................................... 21
Installation Prerequisites ...................................................................................... 21
Optional Network Components ................................................................... 23
Client Requirements ....................................................................................... 23
Planning Your Installation .................................................................................... 24
General Deployment Considerations .......................................................... 24
Coverage and Capacity Planning ................................................................. 26
Placement .................................................................................................. 26
RF Patterns ................................................................................................ 27
Capacity and Cell Sizes ........................................................................... 28
Fine Tuning Cell Sizes ............................................................................. 29
Roaming Considerations ........................................................................ 30
Allocating Channels ................................................................................ 30
Deployment Examples ............................................................................ 33
IEEE 802.11n Deployment Considerations ................................................. 35
MIMO (Multiple-In Multiple-Out) ........................................................ 36
Multiple Data Streams — Spatial Multiplexing ................................... 37
Channel Bonding ..................................................................................... 38
Improved MAC Throughput ................................................................. 39
Short Guard Interval ............................................................................... 39
Obtaining Higher Data Rates ................................................................. 40
802.11n Capacity ...................................................................................... 41
Failover Planning ............................................................................................ 41
Switch Failover Protection ..................................................................... 43
Power Planning ............................................................................................... 44
Power over Gigabit Ethernet ................................................................. 44
Security Planning ............................................................................................ 45
Wireless Encryption ................................................................................ 45
Authentication ......................................................................................... 45
Port Requirements .......................................................................................... 47
Network Management Planning .................................................................. 51
WDS Planning ................................................................................................. 52
Common Deployment Options .................................................................... 55
Installation Workflow ........................................................................................... 56