Lte Eran7.0 Power Control Feature

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.

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.

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.

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.

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.

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.

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.

In closed loop power control in PUSCH, the power control reference signal keeps the same as in open loop.

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.

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.