Network technology Flashcards
(24 cards)
A high and low-frequency radio waves that allow us to send the signals to mobile phones
Spectrum
Everything that communicates wirelessly uses a slice of ——
Spectrum
On mobile communication highway, lanes are called
Spectrum
With all data traffic, how signals avoid bumping into each other
All wireless carriers purchase a license from the Federal Communication Commission (FCC).
What does FCC do?
FCC allocates (awards) wireless spectrum in the designated frequency bands to carriers using an auction process
What is the measure of Frequency
Frequency is measured in Hertz (Hz)
What is the range of radio waves frequency?
The radio spectrum has a frequency from 10,000 to 300 GHz
Which frequencies travel farther and penetrate solid better?
Lower frequencies
Which frequency can carry more information
Higher frequency
What is the best range of frequencies for cell phones use?
700MHz to 2.5GHz (2500MHz)
What are the bands?
Bands are range of frequencies allocated for a specific purpose(s). FCC names each band and has certain rules associated with each band.
What are the Blocks?
Each band is sub-divided into smaller and separate frequency blocks and sold to different carriers.
The —-the block, the larger data throughput
larger
FCC also controls which —— can be used in each block
frequency
What are the approved technologies for 2G frequency Band for PCS 1600 band
CDMA & GSMAone.
For 3G what technologies are used?
UMTS & CDMA 2000
LTE is used for which technology?
4G
What is required by the carrier after purchasing spectrum from FCC at the auction price?
Carriers are also required to spend money to help the ‘incumbents’ adjust their equipment to use on the alternate block of spectrum and clear the band for wireless use
Are all spectrums licensed?
No. They are Unlicensed spectrums which use WiFI.
What are smaller sites called?
Smaller sites are called micro, pico, and femto cells
The range of microcells is ——
1.2 miles. It provides coverage in areas that have poor coverage (urban)
The range of picocells is —–
200 meters or less
What is the range for femtocells
Femtocells cover about 10 meters
What is DAS
DAS is used to extend coverage in the venues where coverage is hard to achieve through microcells
