WCDMA & CDMA fast power control provides provides a diversity gain .
Cross polar antennas are necessary for Tx/Rx diversity to work .
Wide transmission can provide a diversity gain .
Interleaving of data bits can provide a diversity gain .
Soft HO can results in a macro-diversity gain .
Increases thermal noise at base station receiver .
Provide additional diversity .
Causes fast fadding of received signal .
Requires additional channel elements .
Backlobe (Lobe C) is uptilted .
Backlobe (Lobe C) is downtilted .
Sidelobes (Lobe B) are downtilted .
Sidelobes (Lobe B) are maintained.
Increase the electrical downtilt .
Decrease the machanical downtilt .
Change the antenna azimuth .
Verify base station alarms .
A module used to increse radio channel element capacity .
A Diplexer used for dual band antennas .
A transmitter and receiver installed close to the antenna to reduce feeder loss .
A solution to increase coverage .
Number of subscribers
Mobile transmitter power
Number of carriers per cell
Receiver blocking interference
Out of band emission interference
Network timing advance trace
1. RS; 2. CPICH ; 3. BCCH
1.RS; 2.BCCH; 3.CPICH
1. BCCH ; 2. CPICH ; 3. RS
1.CPICH; 2. BCCH; 3. RS
The loading at which the number of users is 75% of the maximum system capasity .
A theoretical capacity determined by the base station transmitter power.
A theoretical capacity at which the base station receiver noise rise is infinite .
The maximum number of user that can be connected to the system .
It is a special class of modulation-coding schemes used for high rate data transmission to combat multipath .
It is a method of adjusting CQI values to combat radio channel impairments such as multipath, fading & interference .
It is a technique for maximizing received signal powers for high rate data transmissions .
It is a method for matching transmitter characteristics such as modulation and coding to instantaneous radio channel conditions .
Hybrid ring combiner
Obstruction of signal by obstacles near the terminal
Multipath reflection off nearby buildings
Earth curvature effect
The server becomes offset better then the neighbor .
The server becomes better then the neighbor .
The neighbor becomes better than serving .
The neighbor becomes offset better then serving .
If suitable SHO cell fails to be added to the active set, the call will drop .
If a new candidate cell is detected for SHO, the UE sends a RACH transmission to the cell to setup the link .
SHO can only be performed between cells using the same carrier frequency .
Cell in active set are always in SHO .
Updated traffic data .
Correct digital terrain map .
Calibrated propogation model
Correct number of cell transmitters .
One or more transmission of a packet are used until the packet can be successfully decoded
It is the way of minimizing signal to noise(SNR) ratios when receiving multiple signals
It is a adeptive rate query scheme used for link adaption in soft handover .
It is a modulation scheme that allow data rates to be achived .
The type of antenna .
The type of enviroment
The type of reference coordinate system
The type of traffic data
Drop call rate
Uplink & downlink throughput
Busy hour traffic
Call setup success rate
It sets the base station or mobile terminal receiver sensitivities .
It defines the base station or mobile station receiver noise figures .
It determines the coding rate & throughputs used for link adaptation .
It ensure that the base station or mobile terminal transmitter power do not exceed legal limits .
Directional antennas are not used
Generally, remote radio units reduce feeder losses .
Extended range cells are used .
Cross polar antennas provide suffucient diversity .
Horizontal beam width = 10º
Horizontal beam width = 65º
Horizontal beam width = 120º
Horizontal beam width = 90º
Provide an estimation based on planning tool results, using analytical studies .
Provide an estimation based on link budget analysis .
Provide an estimation based on planning tool results, using Monte Carlo simulation.
Provide an estiamtion based on RF optimization results, using site selection capabilities .
Traffic distribution map
Satellite photograph map .
Noise rise map
Clutter type (environment) map
A parameter in the base station that is used for UL power control .
The improvement in the SNR caused by active or passive RF system components .
The UL coverage improvemant when using a tower mounted amplifier.
The degradation in the signal-To-Noise ratio (SNR) caused by active or passive RF system components .
Change the antenna height
Adjust the downlink powers of cells
Perform a drive test using a scanner .
Reduce the log normal fading margin .
UE with MME
ENB with eNb
ENB with MME
ENB with UE
Increase the number of scrambling codes .
Increase power amplifier (PA) output power .
Increase BW by 1 MHz.
Disable soft handover (SHO).
Soft handover success rartio .
Minutes per drop .
Call setup Succes Rate (CSSR) .
Drop Call rate.
The amplifire should be placed just after the feeder cable (location B)
The amplifier should be placed just after the antenna (location A)
The amplifire should be placed just after the base station receiver (Location C)
If a TMA is used, it does not matter where the amplifier is palced .
Change antenna tilts
Add tower mounted amplifire
Add a new site in the area
Add another carrier frequency to each site .
Coverage prediction, radio N/W link budget, Monte Carlo analysis, initial tuning & neighbor planning.
Radio N/W link budget, Coverage prediction, Monte Carlo analysis, neighbor planning.& initial tuning
Radio N/W link budget, Coverage prediction, Monte Carlo analysis, initial tuning neighbor planning.
Radio N/W link budget, Monte Carlo analysis, Coverage prediction, neighbor planning. & initial tuning
BSIC does not depends on frequency plan.
BSIC is a combination of NCC & BCC
BSIC depends directly on the BCCH that is used .
BSIC depends on the hopping type .
To amplify the signal by 3 dB,
To provide a final element in a transmit chain
To distribute the signal with equal power distribution ,
To improve gain
A change in the distance between tranmitter & receiver
A change in the transmitted power
A change in the frequency band
A change in the antenna tilt.
To improve the DL performance of a base station, especially if feeder losses are high
To overcome inter modulation interference issues in co-sited base station
To improve the sensivity of a base station receiver system, especially if feeder losses are high
To assist with DL power control for a base station transreceiver
Sector O/P power
Terrain elevation map
BCCH frequency of the setor
Position of the sectors (latitude/longitude)
A signal to interference-plus-noise ratio(SINR) plot
A soft HO state plot
A receive signal reference power (RSRP) plot
A received signal code power (RSCP) plot
The gain is approximately 12 dBi at horizontal angles of 30 and -30 degrees from the direction of maximum gain.
The gain is approximately 9 dBi at horizontal angles of 30 and -30 degrees from the direction of maximum gain.
The gain is approximately 12 dBi at horizontal angles of 60 and -60 degrees from the direction of maximum gain.
The gain is approximately 9 dBi at horizontal angles of 60 and -60 degrees from the direction of maximum gain.
Base station power
Field component diversity
Mobile phone can measure more then 1 cell in idle mode .
Mobile phones can simultaneously connect to more then one radio links .
Mobile phones can combine multiple links a RAKE receiver .
Mobile phones can simultaniously connect to two carrier frequencies .
Vertical beam width is larger for higher frequency.
Vertical beam width is smaller for higher frequency.
Antenna gain is lower for higher frequency.
Antenna gain is higher for higher frequency.
Larger diameter cables have lower transmission loss per meter.
Flexible coaxial cables can be easily installed into small spaces.
Smaller diameter cables have a smaller bending radius and are easier to install.
Radiating coaxial cables allow for the gradual release of signals over the length of the cable.
Scrambling code plan
number of neighbors per cell
It selects the strongest cell RSRP to ensure that the best cell is used for making calls.
It uses the quality of the BCCH channel to determine the best cell.
It uses RACH transmissions to determine which cell is the best cell for making calls.
It selects the serving cell based on a ranking using RSRP measurements, offset, and hysteresis parameters.
Inter radio access technology (IRAT) session continuity
Inter radio access technology (IRAT) handover
Break before make handover
Make before break handover