On the Impact of Signal-Level-Based Power Control on Terminal Battery Duration

1999 ◽  
pp. 73-80
Author(s):  
Marco Chiani ◽  
Andrea Conti ◽  
Roberto Verdone
Keyword(s):  
Power Control ◽  
The Impact

scholarly journals Joint UAV channel modeling and power control for 5G IoT networks

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Xiuhua Fu ◽  
Tian Ding ◽  
Rongqun Peng ◽  
Cong Liu ◽  
Mohamed Cheriet
Keyword(s):  
Energy Efficiency ◽  
Power Control ◽  
Channel Model ◽  
Path Loss ◽  
Channel Modeling ◽  
Signal Propagation ◽  
Spectrum Efficiency ◽  
Propagation Path ◽  
Control Factor ◽  
The Impact

AbstractThis paper studies the communication problem between UAVs and cellular base stations in a 5G IoT scenario where multiple UAVs work together. We are dedicated to the uplink channel modeling and the performance analysis of the uplink transmission. In the channel model, we consider the impact of 3D distance and multi-UAVs reflection on wireless signal propagation. The 3D distance is used to calculate the path loss, which can better reflect the actual path loss. The power control factor is used to adjust the UAV's uplink transmit power to compensate for different propagation path losses, so as to achieve precise power control. This paper proposes a binary exponential power control algorithm suitable for 5G networked UAV transmitters and presents the entire power control process including the open-loop phase and the closed-loop phase. The effects of power control factors on coverage probability, spectrum efficiency and energy efficiency under different 3D distances are simulated and analyzed. The results show that the optimal power control factor can be found from the point of view of energy efficiency.

The stable transfer method using zero power control in the CTTS system

2019 ◽  
Vol 57 (4) ◽  
pp. 376-384 ◽  
Author(s):  
Ho-Yun Seon ◽  
Ji-Hoon Yang ◽  
Sang-Hun Lee ◽  
Seong-Mi Park ◽  
Sung-Jun Park
Keyword(s):  
Power Control ◽  
Power Supply ◽  
Current Flow ◽  
The State ◽  
Power Sources ◽  
Electrical Arc ◽  
Transfer Method ◽  
The Stability ◽  
The Impact ◽  
Grid Management

In the CTTS system, while transferring the power supply from the grid to the generator, a sudden arc arises, which causes damage to the system. The method proposed in this study reduces this damage. The power state of the generator stage is made equal to the state of the power of the grid in order to prevent the occurrence of a sudden arc. Even if the generator power state is the same with the power state of the generator, an arc can be generated due to a sudden current flow during the transfer. Therefore, the current in the generator stage is controlled to 0 (zero) when transferring, so that the generation of an electrical arc is minimized. In general, when the CTTS system is used for transferring power sources with an emergency generator, the impact from the electrical arc will be momentarily proportional to the amount of the power supplied from the generator to the load. The damage by the arc will make the life of the CTTS system shorter. In order to prevent such damage, a blocking technique using parallel capacitor is constituted. However, this causes arc generation at the time of input. Thus, in this paper, it is proposed to control the effective or ineffective power of the system to zero. To verify the validity of the proposed method, firstly the Powersim simulation was conducted, and after confirming the feasibility based on this, the actual prototype was created and implemented. Zero power control is proposed as a way to improve the stability of CTTS by significantly reducing the generation of an electrical arc. And this technique can help people working on the distributed power or the grid management.

scholarly journals Channel Access and Power Control for Mobile Crowdsourcing in Device-to-Device Underlaid Cellular Networks

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Yue Ma ◽  
Li Zhou ◽  
Zhenghua Gu ◽  
Yang Song ◽  
Bin Wang
Keyword(s):  
Power Control ◽  
Cellular Networks ◽  
Spectral Efficiency ◽  
Cellular Network ◽  
Handheld Devices ◽  
Channel Access ◽  
Mobile Crowdsourcing ◽  
Device To Device ◽  
Area Spectral Efficiency ◽  
The Impact

With the access of a myriad of smart handheld devices in cellular networks, mobile crowdsourcing becomes increasingly popular, which can leverage omnipresent mobile devices to promote the complicated crowdsourcing tasks. Device-to-device (D2D) communication is highly desired in mobile crowdsourcing when cellular communications are costly. The D2D cellular network is more preferable for mobile crowdsourcing than conventional cellular network. Therefore, this paper addresses the channel access and power control problem in the D2D underlaid cellular networks. We propose a novel semidistributed network-assisted power and a channel access control scheme for D2D user equipment (DUE) pieces. It can control the interference from DUE pieces to the cellular user accurately and has low information feedback overhead. For the proposed scheme, the stochastic geometry tool is employed and analytic expressions are derived for the coverage probabilities of both the cellular link and D2D links. We analyze the impact of key system parameters on the proposed scheme. The Pareto optimal access threshold maximizing the total area spectral efficiency is obtained. Unlike the existing works, the performances of the cellular link and D2D links are both considered. Simulation results show that the proposed method can improve the total area spectral efficiency significantly compared to existing schemes.

scholarly journals Maximum Transmit Power for UE in an LTE Small Cell Uplink

Electronics ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 796 ◽  
Author(s):  
Amir Haider ◽  
Seung-Hoon Hwang
Keyword(s):  
Power Control ◽  
Network Performance ◽  
Fractional Power ◽  
Small Cell ◽  
Control Mode ◽  
Small Cells ◽  
Transmit Power ◽  
Lte Networks ◽  
Maximum Transmit Power ◽  
The Impact

To furnish the network with small cells, it is vital to consider parameters like cell size, interference in the network, and deployment strategies to maximize the network’s performance gains expected from small cells. With a small cell network, it is critical to analyze the impact of the uplink power control parameters on the network’s performance. In particular, the maximum transmit power (Pmax) for user equipment (UE) needs to be revisited for small cells, since it is a major contributor towards interference. In this work, the network performance was evaluated for different Pmax values for the small cell uplink. Various deployment scenarios for furnishing the existing macro layer in LTE networks with small cells were considered. The Pmax limit for a small cell uplink was evaluated for both homogenous small cell and heterogeneous networks (HetNet). The numerical results showed that it would be appropriate to adopt Pmax = 18 dBm in uniformly distributed small cells rather than Pmax = 23 dBm, as in macro environments. The choice of Pmax = 18 dBm was further validated for three HetNet deployment scenarios. A decrease of 0.52 dBm and an increase of 0.03 dBm and 3.29 dBm in the proposed Pmax = 18 dBm were observed for the three HetNet deployments, respectively. Furthermore, we propose that the fractional power control mode can be employed instead of the full compensation mode in small cell uplinks.

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