Site Survey UCSC -Engineering 2 Linda Rosewood – Lynne Sheehan – Bob Vitale Equipment: WinXP Laptop with Netstumbler MacOSX Laptop with KisMAC Cisco 1200 AP with two types of antennas

1.Compare b/g coverage using 2.2dBi “duck” and 5.2dBi ceiling mount antennas. 2.Investigate interesting propagation effects -through walls, windows, between floors, down corridors. 3. Map a coverage area for the 2 nd floor using APs positioned in the corridor and positioned in a lab. Do the results help determine AP placement for building? Objective: Learn About & Understand Propagation in the Engineering 2 Building South Corridor Note “decorative” metal ceiling tiles

2 nd Floor Survey Areas Faculty offices Labs Academic Support Conference room Conference room Loc #2: Rear Corridor Ceiling, AP above 5.5dBi antennas hang below Loc #1: Inside Lab, survey done with 2.2dBi “ducks” and 5.5dBi ceiling mount omnis

Ducks vs. Ceiling Mount Omni 5.5dBi Suspended Ceiling Mount Omni- Directional Antennas Cisco AIR-ANT1728 Cost: $105 each 2.2dBi Rubber Duck Antennas Cisco AIR-ANT4941 Cost: $15 each

E2 2 nd Floor West Survey – Rubber Duck vs. Ceiling Mt Omni See Next Slide for values, most points Omnis beat ducks by 1 to 6 dB, average 3dB improvement Hidden Area behind elevators Hidden Area behind ducts/walls

RubberDuck Ceiling Mount Omni Diff Location #NameAverageSTDEVAverageSTDEV + = om 1 Room feet from AP Outside Rm 208 Main Cooridor Bench 1 Outside Rm Bench 2 Outside Rm Room 216 cube close to AP Room 216 cube furtherest away Room 215 card towards AP Room 215 card away from AP Room206 Card pointed South A/C Unit between AP/Card Room 205 cube closest to windows Hall behind Room Room 237B Office w/Door closed Interactive Space Benches outside E Room 201 Last Cubicle on Windows Cowboy Chairs 2nd Chair in Room 308 Immediately above AP

E2 2 nd Floor – East Survey Hidden Areas due to coated glass, walls and ductwork

802.11b Propagation FreeSpace vs. Through Coated Glass

Glass Corridor vs. Free Space Is there a difference at 173 feet?

Proposed 2 nd Floor Coverage Plan Faculty offices Labs Academic Support Conference room Conference room Channel 1 Channel 11 Channel 6 Channel 1