The AutoCAD drawing was included along with the original drawing but this is upstairs office portion that was separated to do a site survey for the office area. The upstairs obstructions were, cubical walls, and a few offices. The office is the 2nd floor that had 10′ ceiling tiles and 325′ in length and 145′ in width.
After the the AutoCAD drawing was inserted into LanPlanner software, LanPlanner will format the building. Formatting the building is a crucial part in the site survey process. In order to accurately predict and measure the RF infrastructure the format process must be accurate. The format process consist of telling LanPlanner from the original drawing what type of obstruction is in the building and what the obstruction is made of and the height of the obstruction. With this building the main obstructions were the racks, and office space. The cell phone company did require 3 different WLAN’s for coverage which included laptops, mobile devices, and VoIP(voice over IP). When doing a voice prediction it is required that the RSSI is at least -65dBm or better. The material of each obstruction has to be accurate as well in order for LanPlanner to know what dB loss will occur when an RF signal reaches it.
After the format process, Access Points/Ports can be placed throughout the warehouse. The cell phone company building would have 50 Motorola AP300’s with 2 5Ghz Omni Antenna’s for each AP were placed throughout the warehouse. Each AP300 was placed roughly 34′ from the ceiling. Each AP300 color represents a channel. For the least amount of channel interference for 802.11b/g, channels 1, 6, & 11 are to be used. Black represents channel 1, Yellow represents channel 6, and Red for channel 11. Also the X,Y coordinates were added next to the AP to accurately place each AP throughout the warehouse.
After formatting the office portion of the cell phone company, the total amount of Motorola AP300’s internal antenna was 11 to cover the office area with 802.11b/g coverage. In this office LanPlanner used black for channel 1, yellow for channel 6 and blue for channel 11. Each AP300 was snapped onto the ceiling tile.
With the AP’s placed then LanPlanner can predict the RSSI(Received Signal Strength Indication), SNR (Signal to Noise Ratio), Channels, and the throughput. For this cell phone company LanPlanner predicted the 50 AP’s would cover the warehouse from 24Mbs to 54Mbs of coverage. In the colored heat map drawing of the warehouse, each color represents a different amount of RSSI or throughput. RED is a -50dBm(dBm is the power ratio in decibels) or can represent any where from 48Mbs to 54Mbs of throughput. YELLOW is a -60dBm or can also represent anywhere from 36Mbs to 48Mbs of throughput. GREEN is a -70dBm or also represented anywhere from 24Mbs to 36Mbs of throughput.
As well as the warehouse portion the prediction for the 2nd floor office was predicted as well. The 11 AP300’s predicted a very high data rate in the office area to cover the throughput needed for laptop use in the office area
When the install is complete the measurement process takes place on site. LanPlanner software uses a Motorola tested and certified wireless card to take measurements. In the facility the LanPlanner engineer walks around the facility and takes measurements from any given point. LanPlanner records the RSSI, SNR, and or Data rate in real time from the surrounding approved Access Points. For this cell cell phone company each RED dot represents a point at which a measurement had taken place. LanPlanner takes the measurements and produces a heat map. The RED color represents -50dBm or 48-54Mbs of throughput as stated in the prediction process, the YELLOW represents -60dBm 36 – 48Mbs of throughput, and GREEN is -70dBm or 24-36Mbs of throughput. The WHITE space in the drawing is indicating where a measurement was not taken. This could be caused by pallets in the way or product on the floor to where a measurement could not be taken.
Measurements for the 2nd floor office were also taken. Heat map colors of measurements are the same as the warehouse