User's Manual

PMP 450 Planning Guide
Further reading on wireless operation .....................................................................................................................1-46
System management .......................................................................................................................................................1-47
Management agent ..................................................................................................................................................1-47
Web server ...............................................................................................................................................................1-47
Remote Authentication Dial In User Service (RADIUS) ........................................................................................1-50
SNMP ......................................................................................................................................................................1-50
Network Time Protocol (NTP) ................................................................................................................................1-51
Wireless Manager (WM) .........................................................................................................................................1-51
Capacity upgrades ...................................................................................................................................................1-52
Software upgrade .....................................................................................................................................................1-52
Further reading on system management ..................................................................................................................1-53
Chapter 1: Planning considerations ......................................................................... 1-54
Regulatory planning ........................................................................................................................................................1-55
Obeying Regulatory limits ......................................................................................................................................1-55
Conforming to the limits .........................................................................................................................................1-55
Network migration planning ...........................................................................................................................................1-56
Example PMP 450 deployment scenario .................................................................................................................1-56
Sector capacity ........................................................................................................................................................1-58
Site planning ...................................................................................................................................................................1-65
AP or SM site selection ...........................................................................................................................................1-65
Power supply site selection .....................................................................................................................................1-65
Maximum cable lengths ..........................................................................................................................................1-65
Wind loading ...........................................................................................................................................................1-66
Link planning ..................................................................................................................................................................1-69
Range and obstacles ................................................................................................................................................1-69
Path loss considerations ...........................................................................................................................................1-92
Calculating maximum power level for connectorized AP units ..............................................................................1-92
Understanding Attenuation ......................................................................................................................................1-92
Calculating Link Loss .............................................................................................................................................1-93
Calculating Rx Signal Level ....................................................................................................................................1-93
Calculating Fade Margin .........................................................................................................................................1-94
Analyzing the RF Environment ......................................................................................................................................1-94
Mapping RF Neighbor Frequencies ........................................................................................................................1-94
Analyzing the spectrum ...........................................................................................................................................1-95
Anticipating Reflection of Radio Waves .................................................................................................................1-96
Noting Possible Obstructions in the Fresnel Zone ..................................................................................................1-96
Multiple OFDM Access Point Clusters ...................................................................................................................1-97
Planning for co-location and using the OFDM Frame Calculator Tool ..................................................................1-99
Selecting Sites for Network Elements ........................................................................................................................... 1-102
Surveying Sites ...................................................................................................................................................... 1-103
Clearing the Radio Horizon ................................................................................................................................... 1-103
Calculating the Aim Angles .................................................................................................................................. 1-104
Diagramming Network Layouts .................................................................................................................................... 1-105
Avoiding Self Interference .................................................................................................................................... 1-105
pmp-0047 (March 2014)
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