scholarly journals Bandwidth-Based Wake-Up Radio Solution through IEEE 802.11 Technology

Sensors ◽  
2021 ◽  
Vol 21 (22) ◽  
pp. 7597
Author(s):  
Elena Lopez-Aguilera ◽  
Eduard Garcia-Villegas
Keyword(s):  
Ieee 802.11 ◽  
Binary Data ◽  
Data Exchange ◽  
Operation Mode ◽  
Power Saving ◽  
Software Tool ◽  
Consumer Electronics ◽  
Transmission Opportunity ◽  
Radio Signals ◽  
Almost All

IEEE 802.11 consists of one of the most used wireless access technologies, which can be found in almost all consumer electronics devices available. Recently, Wake-up Radio (WuR) systems have emerged as a solution for energy-efficient communications. WuR mechanisms rely on using a secondary low-power radio interface that is always in the active operation mode and is in charge of switching the primary interface, used for main data exchange, from the power-saving state to the active mode. In this paper, we present a WuR solution based on IEEE 802.11 technology employing transmissions of legacy frames by an IEEE 802.11 standard-compliant transmitter during a Transmission Opportunity (TXOP) period. Unlike other proposals available in the literature, the WuR system presented in this paper exploits the PHY characteristics of modern IEEE 802.11 radios, where different signal bandwidths can be used on a per-packet basis. The proposal is validated through the Matlab software tool, and extensive simulation results are presented in a wide variety of scenario configurations. Moreover, insights are provided on the feasibility of the WuR proposal for its implementation in real hardware. Our approach allows the transmission of complex Wake-up Radio signals (i.e., including address field and other binary data) from legacy Wi-Fi devices (from IEEE 802.11n-2009 on), avoiding hardware or even firmware modifications intended to alter standard MAC/PHY behavior, and achieving a bit rate of up to 33 kbps.

Investigating the Analysis of Power Saving Mode in IEEE 802.11 for Wi-Fi Communication

2018 ◽  
Vol 6 (3) ◽  
pp. 13-19
Author(s):  
Isam Aameer Ibrahim ◽  
Haider TH Salim ◽  
Hasan F. Khazaal
Keyword(s):  
Ieee 802.11 ◽  
Network Performance ◽  
Power Saving ◽  
Packet Delay ◽  
Access Point ◽  
Battery Life ◽  
Global Issues ◽  
Time Ratio ◽  
Power Saving Mode ◽  
Saving Mode

One of the major global issues today is energy consumption. Consequently, power management was introduced in various communication technologies. For IEEE 802.11wireless communication, there is a Power Saving Mode scheme (PSM) for increase the battery life of cell phone. In this PSM, there are two key parameters: beacon period interval (BI) and listen interval(LI). In most work these values are chosen arbitrary. Here, a scheme to determine the optimal BI and LI for accomplishing the most astounding conceivable vitality proficiency is introduced. This is implemented with the application of a numerical sample to the standard IEEE 802.11 PSM and Access Point-PSM (AP-PSM) schemes. To ensure the quality of network performance analysis on the normal and change of parcel delays is doing. The well-known queuing (M/G/I) model with bulk services are utilized. After the implementation of the proposed analysis, “maximum rest plan time ratio optimal Sleep Scheme (OSS)” which is when participate stations stay in the doze mode it can be determined. In this research shows that the optimal BI and LI produce optimal OSS time ratio scheme also achieved optimal average and variance of packet delay.

Improving IEEE 802.11 power saving mechanism

2007 ◽  
Vol 14 (3) ◽  
pp. 375-391 ◽  
Author(s):  
Eun-Sun Jung ◽  
Nitin H. Vaidya
Keyword(s):  
Ieee 802.11 ◽  
Power Saving ◽  
Power Saving Mechanism

Novel Concept for Totally Integrated Automation (TIA) Using Siemens Bus System and WinCC Online Control

2000 ◽  
Author(s):  
T. Frederking ◽  
R. Gadow
Keyword(s):  
Process Parameters ◽  
High Speed ◽  
Data Exchange ◽  
Thermal Spraying ◽  
Software Tool ◽  
Functionally Graded ◽  
Flame Spray ◽  
Total Quality ◽  
Spray Process ◽  
Bus System

Abstract Total quality management requires definite process control as well as online diagnostics, if applied in industrial surface refinement by thermal spraying. A concept for integrated online diagnostics for the high velocity oxygen fuel (HVOF) flame spray process is presented using Siemens S7-300 programmable logic controller and PC-based Siemens WinCC (Windows Control Center) visualization software. The standard functionality of the WinCC programming environment can be extended by C-scripts. The integrated database allows to protocol the relevant process parameters periodically for total quality assurance. Also particle flux imaging software tools can be implemented to adjust online process parameters and for process diagnostic purposes. The Siemens bus system hierarchy thereby provides high speed communication skills for field bus level data exchange and for supervising system components, e.g. CCD-cameras. The interconnection between S7-300 PLC, 6-axis-robot and a novel WinCC software tool enables definite automatic changes of recipes during the coating process to generate functionally graded coatings.

scholarly journals Geometry Related Inter-Instrument Differences in Spectrophotometric Measurements

2010 ◽  
Vol 25 (2) ◽  
pp. 221-232
Author(s):  
Per Edström ◽  
Magnus Neuman ◽  
Stefanos Avramidis ◽  
Mattias Andersson
Keyword(s):  
Data Exchange ◽  
Physical Mechanism ◽  
External Factors ◽  
Radiative Transfer Model ◽  
Transfer Model ◽  
Graphic Arts ◽  
Reflected Light ◽  
Almost All ◽  
Reflectance Measurements ◽  
Model Measurement

Abstract The L&W Elrepho d/0 and the Spectrolino 45/0 instruments are examined using paper samples with different properties. External factors that influence the measurements - such as the sample background, the instrument calibration and the sample inhomogeneity - are studied, and a methodology for their minimization is presented. Experimental measurements show that such external factors, if not minimized by proper routines, affect the inter-instrument differences far more (up to 4-5 ΔE*ab) than the instrument geometry (the effect of which is small and of order 0.1 ΔE*ab). The DORT2002 radiative transfer model is used to simulate differences caused by instrument geometry. The simulated and measured differences are found to agree in magnitude, and the differences are mapped against sample properties. It is observed that the 45/0 instrument detects higher reflectance from paper samples with negligible absorption and transmittance. When there is considerable absorption (dyed samples) or transmittance (thin samples), the d/0 instrument detects higher reflectance. The physical mechanism behind this behavior is studied and explained using DORT2002, and the instrument differences are shown to depend on the anisotropy of the reflected light. The model/measurement agreement is satisfactory as the characteristic behavior is captured in almost all cases studied. This new understanding is important for facilitating accurate data exchange between the paper and graphic arts industries, but also for interpretation of reflectance measurements in general.

Construction of E-Commerce Information Services Platform in International Trade

2014 ◽  
Vol 926-930 ◽  
pp. 2512-2515
Author(s):  
Liu Wei
Keyword(s):  
International Trade ◽  
Electronic Commerce ◽  
Information Management ◽  
Global Economy ◽  
Data Exchange ◽  
Operation Mode ◽  
Information Service ◽  
Information Services ◽  
Internet Technology ◽  
Operation Platform

With popularity of Internet technology in international trade, the demand of electronic commerce information services keeps expanding, and the platform of electronic commerce information services has become key factor in the international trade information management in China to optimize the operation mode of international trade, increase trade opportunities and improve the international competitiveness under global economy integration and information society development .In this paper, the content and characteristics of electronic commerce information service are firstly analyzed ,combined with current situation of information management in international trade and enterprises' Internet infrastructure construction in China, it is proposed to construct an single-window platform, including the national common interface of data exchange, the common data exchange service platform for import and export enterprises, banking, logistics companies and government, and industry cooperative operation platform related to domestic and international trade activities.

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