Hidden Node due to Multiple Transmission Power Level for White Space Radio Operating in the TV Bands

2012 ◽  
Vol E95.A (10) ◽  
pp. 1749-1758
Author(s):  
Chin-Sean SUM ◽  
Gabriel Porto VILLARDI ◽  
Mohammad Azizur RAHMAN ◽  
Junyi WANG ◽  
Zhou LAN ◽  
...  
Keyword(s):  
Power Level ◽  
Transmission Power ◽  
White Space ◽  
Hidden Node ◽  
Multiple Transmission

scholarly journals Power Allocation in the TV White Space under Constraint on Secondary System Self-Interference

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Byungjin Cho ◽  
Konstantinos Koufos ◽  
Kalle Ruttik ◽  
Riku Jäntti
Keyword(s):  
Power Allocation ◽  
Power Level ◽  
Allocation Rule ◽  
Transmission Power ◽  
Allocation Scheme ◽  
White Space ◽  
Secondary System ◽  
Cell Border ◽  
Tv White Space ◽  
Secondary Network

The Electronic Communication Committee (ECC) in Europe proposed a location-based transmission power allocation rule for secondary devices operating in the TV white space (TVWS). The further the secondary device is located from the TV cell border the higher transmission power level it can utilize. The Federal Communication Committee (FCC) in the US proposed a fixed transmission power allocation rule for all secondary transmitters. Both rules do not consider the secondary system’s self-interference while setting the transmission power levels. In this paper, we propose a power allocation scheme for a cellular secondary system. Unlike the ECC and the FCC proposals we do the power allocation by considering the self-interference. We define the power allocation scheme as an optimization problem. The sum cell border data rate of the secondary network is selected to be the optimization objective. We observe that the optimal transmission power levels become approximately constant over the secondary deployment area. The FCC rule captures the general trend for cellular deployment in the TVWS, since it suggests the use of constant power. However, the transmission power should not be set equal to 4 W but according to the allowable generated interference at the borders of the TV and secondary cells.

scholarly journals An Analysis of the Use of Multiple Transmission Power Levels on Wireless Sensor Networks

Proceedings ◽  
2018 ◽  
Vol 4 (1) ◽  
pp. 3
Author(s):  
Felipe Antonio Moura Miranda ◽  
Paulo Cardieri
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Wireless Sensor ◽  
Great Effort ◽  
Transmission Power ◽  
Multihop Wireless ◽  
Negative Results ◽  
Wide Perspective ◽  
The Impact ◽  
Multiple Transmission

The energy consumption in wireless sensor networks is the critical concern of different studies, especially because of the great effort, or even the impossibility, to replace the battery of their motes. Consequently, it is fundamental to investigate and evaluate the energy spent by every individual task executed by the motes in order to provide an efficient use of their batteries. In this work, we employ different metrics to present a thorough study of how the use of multiple transmission power levels affects multihop wireless sensor networks. This work is motivated by the current employment of the multiple transmission power levels, on both academic works and commercial solutions, which is a novel feature of some radio transceivers commonly used in wireless sensor network motes. Aiming for reliable and extensive analysis, this study employs simulations in different scenarios and models of commonly employed electronic components. The contribution of this works is a detailed investigation of the impact caused by the use of different transmission power levels employing different metrics, offering a wide perspective on the subject. In general, the results of this study indicate that the use of multiple power levels grants both positive and negative results, according to the scenario and metrics analyzed.

Joint Optimization of Transmission Power Level and Packet Size for WSN Lifetime Maximization

2016 ◽  
Vol 16 (12) ◽  
pp. 5084-5094 ◽  
Author(s):  
Ayhan Akbas ◽  
Huseyin Ugur Yildiz ◽  
Bulent Tavli ◽  
Suleyman Uludag
Keyword(s):  
Power Level ◽  
Joint Optimization ◽  
Transmission Power ◽  
Packet Size ◽  
Lifetime Maximization ◽  
Wsn Lifetime

Study on Noise Control of Fan with Air Suction

2011 ◽  
Vol 138-139 ◽  
pp. 391-394
Author(s):  
Li Jun Wang ◽  
Zhi Yang Pan
Keyword(s):  
Power Loss ◽  
Noise Control ◽  
Power Level ◽  
Sound Power ◽  
Transmission Power ◽  
Fan Noise ◽  
Search Result ◽  
Sound Power Level ◽  
Pneumatic Device ◽  
Combine Harvester

Fan is a pneumatic device in the 4ZTL-1800 combine harvester threshing prior to cutting. Based on the prophase search result that fan noise is highest when fan rotates at 1200r/min, in order to decrease noise of it, sigle-microperferated-panel muffler, double-microperferated-panel muffler and interposition muffler were designed and tested. The results show that double-microperferated-panel muffler is best and sound power level of fan is decreased 11dB, and that interposition muffler is better, and that sigle-microperferated-panel muffler is worst to descrease fan noise. Through contrast on transmission power loss of different mufflers, cone-shaped double-microperferated-panel muffler is verified to be best for noise control of fan.

A GPS-Less Cell-Based Localization Technique for Wireless Sensor Networks

2012 ◽  
Vol 601 ◽  
pp. 376-382
Author(s):  
Xue Jun Li
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Power Level ◽  
Wireless Sensor ◽  
Transmission Power ◽  
Localization Algorithm ◽  
Localization Technique ◽  
Simulation Results

This paper presents a localization algorithm, namely Circle Based Localization (CBL) for GPS-less wireless sensor networks. CBL works by finding the centroid of intersection of any two circles. Furthermore, we study the effect of power level mismatch among anchors. Simulation results show that CBL can significantly improve the accuracy by 5% while reducing the transmission power of anchors.

A Transmission Power Control Mechanism for 802.15.4+RPL-Operated Wireless Sensor Network

2020 ◽  
Vol 10 (2) ◽  
pp. 197-206
Author(s):  
Ali Qolami ◽  
Mohammad Nassiri ◽  
Hatam Abdoli
Keyword(s):  
Power Control ◽  
Network Lifetime ◽  
Control Method ◽  
Power Level ◽  
Link Quality ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Control Mechanisms ◽  
Transmission Power ◽  
Transmission Power Control

Background and Objective: Wireless Sensor Networks (WSNs) are typically formed by one or more sink nodes and a large number of sensor nodes that are able to sense, process and transmit data. Topology control mechanisms can be utilized to guarantee requirements such as connectivity, coverage, delay and network lifetime in WSNs. One effective way to control the topology is adjusting transmission power level in each node according to the link quality conditions. The goal of Transmission Power Control (TPC) is to set the transmission range of each node by adjusting its transmission power level. Methods: In this paper, we investigate TPC in 802.15.4+RPL WSNs. In our proposed mechanism, each node dynamically adjusts its transmission power based on channel conditions before sending every data and ACK packet. Result and Conclusion: The results of extensive simulations confirm that our power control method improves network performance, especially in terms of network lifetime, which is an essential issue in WSNs.

Sign in / Sign up

Export Citation Format

Share Document