Descripción: procedimiento necesario para determinar los niveles de señal en la areas
Cuestionario de evaluación de WI-FIFull description
-Site Survey for Maxis GABS -Migrating or Swapping equipment for Ericsson to Huawei -Equipment Up-Grading
Site Survey and Layout of Bts
Dasar-dasr pengukuran tanah untuk wilayah tambang
Descripción completa
Risk AssessmentFull description
Dasar-dasr pengukuran tanah untuk wilayah tambangFull description
RF Site Survey Basics
fundamentals1
Si t e S Sur ur vey F Fund und am ent al alss Cha hapt pt er 9
What i s a S Sii t e S Sur ur vey vey?? z
z
An RF site survey is a ma map p to successfully im plem en entt ing a w ir eless eless ne nett w ork. A site survey is the most important step in im plem en entt ing a ny w ir eless eless ne nett w o r k.
What i s a S Sii t e S Sur ur vey vey?? z
z
An RF site survey is a ma map p to successfully im plem en entt ing a w ir eless eless ne nett w ork. A site survey is the most important step in im plem en entt ing a ny w ir eless eless ne nett w o r k.
Pr ep epar arii ng f or a Si Si t e S Sur ur vey z z z z z z
Facil i t i es Analys nal ysii s Pur po posse & Busi usi ne nesss Req equi ui r em ent s Ba ndw id t h & Roa oam m ing Requir em ent s Available Resources Exi st ing Net w or ks Ar ea Us Usag agee & Tow er s
Facil i t y Analysi s z
z
What kind of f acil it y is it ? Consider the obvious differences that would exist in conducting a site survey of a small office with versus performing a site sur vey of a large of f ice.
Exi st ing Net w or ks z
Is t here al ready a network (wired or wireless) in place?
Ar ea Usage & Tow er s z
Is t he wireless LAN going t o be used indoors, out doors, or both?
Purpose & Business Requirements z z
What is t he purpose of t he wi rel ess LAN? What are t he business requirement s?
Bandwidt h & Roaming Requirement s z
What bandwidt h and roaming requirements are there?
5. 5 Mbps dat a r at e
Roam i ng Requi r em ent s z
z
z
z
How many users are t ypical l y in a given area? What t ype of appl icat ions wil l be used over t he wi reless LAN? Are t here any non-t ypical t imes in which net work needs may change f or a part icular area? What mobil it y or roaming coverage is necessary?
Avail abl e Resour ces z z
z
z
z
What are t he avail able resources? Are facility blueprints available (electronic or print ed)? Are t here any previous sit e survey report s available? Is a f acil it ies escort or securit y badge required? Is physical access t o wiring cl oset s and t he roof avail able if needed?
Security Requirements z
z
What level of network security is necessary? What corporat e policies are in place regarding wi reless LAN securit y impl ement at ion and management ?
Preparation Checklist z z z z
z
z z z
Building blueprint s Pr evious w ir eless LAN sit e sur vey docum ent at ion Curr ent net w ork diagram A meeting with the network administrator, the build ing manager, t he securit y off icer. Access to all areas of the facility to be affected by the w ir el ess LAN Access t o w ir ing closet s Access t o roof (i f out door ant ennas are ant icipat ed) Future construction plans, if available.
Site Survey Equipment z z z z z z z z
Access Poi nt PC Card and Ut il i t i es Lapt ops & PDAs Paper Outdoor Surveys Spect r um Analyzer Net w ork Anal yzer Sit e Sur vey Ki t Checkl i st
Access Point z
z
Used during a site survey should have vari able out put power and ext ernal ant enna connectors. The variable output power feature allows for easy sizing of coverage cells during the si t e sur vey.
PC Card and Ut il iitt i es z z z
z
Signal st r engt h (m easured i n dBm ) Noise f loor (m easured in dBm ) Signal-t o-noise rat io (“ SNR” ) (m easured in dB) Li nk sp eed
Laptops & PDAs z
A laptop computer or PDA unit is used by the site surveyor for checking for signal strength and coverage while roaming around t he f acilit y.
Paper z
Both the surveyor and the network designer should make hard copy (paper) docum ent at ion of all f indings in great det ail f or f ut ure ref erence.
Out door Sur veys z
Outdoor site surveys will take more time, effort, and equipment than will indoor surveys
Spect r um Analyzer
Net w ork Anal yzer z
Pick up any packet s bei ng t ransmit t ed by wireless LANs and wil l provide detailed inf ormat ion on channel s in use, di st ance, and signal strength.
Sit e Sur vey Ki Kitt Checkl ist z z z z z z z z z z z
z
z
Lapt op and/ or PDA included sit e survey ut il it y soft w are Wirel ess PC card wi t h dri ver & ut ili t y soft ware Access poi nt s or br i dges as nee de d Bat t ery pack & DC-t o-AC convert er Clipboard, pen, pencils, notebook paper, grid paper, & hi-lit er Blueprint s & net w ork diagrams Indoor & outdoor ant ennas Cables & connect ors Binoculars and t w o-way r adios Umbr ella and/ or rain suit Specialized software or hardware such as a spectrum analyzer or sniffer Tools, double-sided tape, and other items for temporary hardware mountings Secure & padded equipment case for housing computers, tools, secure documents during the survey and travel to and from the sur vey sit e
Cond uct i ng a Si t e Sur vey z z
Indoor Surveys Out door Sur veys
RF Inf orm at i on Gat her i ng z z z z z z z z
Range & coverage pat t erns Dat a r at e b ou nd ar i e s Documentation Throughput t est s & capacit y planning Int erference sources Wi r e d d at a conn ect i vi t y & AC p ow er c r e qu ir e m ent s Out door ant enna placement Spot checks
Range and Cover age Pat t er ns
Mar ked up f l oor pl an
Dat a Rat e Boundari es
Int er f er ence Sources z
z
Are t here any exist ing wi reless LANs in use in or near t he f acilit y? Are t here any plans f or f ut ure wirel ess LAN inst al lat ions ot her t han t he one in quest ion?
If t his is a mult i- tenant building, are t here any ot her organizat ions wit hin t he buil ding t hat have wireless LANs or sources of RF? Are any ot her organizat ions planning wireless LAN implementations?
Int er f er ence Sources z
z
Are t here any ot her common sources of RF int erf erence in t he 2.4 GHz band in use in t he f acil it y? In case 802.11a net works are t o be inst al l ed, are t here any RF sources in t he 5 GHz range?
Obstacle - Induced Signal Loss
Spot Checks z z z
Cover age in per im et er ar eas Over l appi ng cover age f or seam l ess r oam i ng Co-channel and adjacent channel int erf erence in all areas
