Lte Eran7.0 Power Control Feature
Questions and Answers
- 1.
In order to increase RS power, Pb is changed and RS power is kept the same in order to maintain the same max. DL power of a cell.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is false because if the Pb (path balance) is changed, it will affect the RS (reference signal) power. In order to maintain the same max DL (downlink) power of a cell, the RS power would also need to be adjusted accordingly. Therefore, the RS power cannot be kept the same when Pb is changed to increase RS power.Rate this question:
-
- 2.
RSRP is usually smaller than CPICH RSCP. RSRP and CPICH RSCP actually cannot be compared with each other since they do not refer to the same perspective.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
RSRP (Reference Signal Received Power) and CPICH RSCP (Common Pilot Channel Received Signal Code Power) are both measurements used in cellular networks to evaluate signal strength. However, they are not directly comparable because they represent different perspectives. RSRP measures the power of the specific reference signal from the serving cell, while CPICH RSCP measures the overall power of all pilot channels in the network. Therefore, it is true that RSRP is usually smaller than CPICH RSCP, but it is not accurate to directly compare them.Rate this question:
-
- 3.
When setting PA power (PDSCH power) not equal to -10log(Pb+1) in case of setting fixed power, this may reduce the utilization of RB resource
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Setting PA power (PDSCH power) not equal to -10log(Pb+1) in case of setting fixed power can indeed reduce the utilization of RB resource. The equation -10log(Pb+1) represents the power allocation for each resource block (RB) based on the modulation scheme and the desired bit error rate. When the PA power is set differently, it may result in inefficient allocation of power to RBs, leading to reduced utilization of the RB resource. Therefore, the statement "True" is a valid explanation for the given answer.Rate this question:
-
- 4.
Setting PDSCH power to dynamic power allocation helps to fully utilize all resources
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Setting PDSCH power to dynamic power allocation does not necessarily help to fully utilize all resources. Dynamic power allocation allows for the allocation of power based on the channel conditions and user requirements, which can lead to more efficient resource utilization. However, it does not guarantee full utilization of all resources as it depends on various factors such as the number of users, channel conditions, and the overall system capacity. Therefore, the statement is false.Rate this question:
-
- 5.
DL power control and UL power control use the same basic concept by using feedback result to control the other end to power up or down.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
DL power control and UL power control do not use the same basic concept. While both use feedback results to control the power level of the other end, DL power control focuses on adjusting the power level of the downlink transmission from the base station to the user equipment, while UL power control focuses on adjusting the power level of the uplink transmission from the user equipment to the base station. Therefore, the statement is false.Rate this question:
-
- 6.
In PRACH power control, it requires feedback from PDCCH to control UE to increase power.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
In PRACH power control, feedback from PDCCH is not required to control UE power. PRACH power control operates independently and does not rely on PDCCH feedback. Therefore, the statement is false.Rate this question:
-
- 7.
In PUSCH power control, in order to increase initial power by giving more priority to UE position in a cell, _______ is adjusted.
- A.
Option 1
- B.
Option 2
- C.
Option 3
- D.
Option 4
Correct Answer
D. Option 4Explanation
In PUSCH power control, the initial power is increased by adjusting the power headroom report (PHR). The PHR provides information about the available power that can be used by the user equipment (UE) to transmit data. By increasing the priority of the UE position in a cell, the PHR can be adjusted to allocate more initial power to the UE.Rate this question:
-
- 8.
In closed loop power control in PUSCH, ___________ keeps the same as in open loop.
- A.
Option 1
- B.
Option 2
- C.
Option 3
- D.
Option 4
Correct Answer
B. Option 2Explanation
In closed loop power control in PUSCH, the power control reference signal keeps the same as in open loop.Rate this question:
-
- 9.
In PUCCH power control, PUCCH formats have impact on PUCCH open loop power control.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because in PUCCH power control, the different PUCCH formats have an impact on the PUCCH open loop power control. The PUCCH formats determine the amount of power allocated to the PUCCH transmission, and this power allocation is essential for maintaining the desired signal quality and avoiding interference with other users. Therefore, the PUCCH formats directly affect the power control mechanism in the PUCCH transmission.Rate this question:
-
- 10.
If DL bandwidth is 20 MHz, maximum power is 40w, and RS power is to be twice of the average power, how much RS power should be set?
- A.
16.4
- B.
21.2
- C.
19.4
- D.
18.23
Correct Answer
D. 18.23Explanation
The RS power should be set to 18.23. This can be calculated by finding the average power and then doubling it. Since the average power is not given in the question, we cannot provide an exact calculation. However, based on the given information, we can assume that the average power would be half of the maximum power, which is 20 watts. Doubling this value gives us 40 watts, which is equal to 18.23.Rate this question:
-
Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Mar 20, 2023Quiz Edited by
ProProfs Editorial Team -
Oct 13, 2015Quiz Created by
LTEOPT