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Related Concept Videos

Maximum Power Transfer01:16

Maximum Power Transfer

Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
Directional Relays01:25

Directional Relays

Directional relays, essential for managing unidirectional fault currents, enhance the safety and efficiency of power systems. On power lines equipped with directional relays, faults downstream (to the right) of the current transformer typically cause the fault current to lag the bus voltage by approximately 90 degrees, known as the forward direction. In contrast, upstream (left-side) faults may result in the fault current leading the bus voltage by nearly 90 degrees, termed the reverse...
Transmission Line Design Considerations01:23

Transmission Line Design Considerations

Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
The Midpoint Formula01:24

The Midpoint Formula

In coordinate geometry, determining the central point between two locations is common. This central point, or midpoint, lies exactly halfway along the line segment connecting two points in a two-dimensional space. It has applications in mathematics, physics, engineering, and various planning disciplines.Given two points labeled as A (x1, y1) and B (x2, y2) on a coordinate plane, a straight line segment can be plotted between them. The midpoint, labeled point M, divides this segment into two...
Mesh Analysis for AC Circuits01:12

Mesh Analysis for AC Circuits

In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
Line Protection with Impedance Relays01:27

Line Protection with Impedance Relays

Coordinating time-delay overcurrent relays in complex radial systems and directional overcurrent relays in multi-source transmission loops can be challenging. Impedance relays address these issues by responding to the voltage-to-current ratio, specifically measuring the apparent impedance of a line. These relays become more sensitive during faults as current increases and voltage decreases, thereby reducing the apparent impedance.
Under normal conditions, low load currents keep the measured...

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Related Experiment Videos

Optimal IRS Allocation and Relay Selection for mmWave Multi-Hop Communications for Vehicular Sensor Data Sharing.

Xiaojun Yin1, Xuyang Du1, Xiaohan Wu1

  • 1School of Computer Science and Technology, University of Science and Technology of China, Hefei 230026, China.

Sensors (Basel, Switzerland)
|June 26, 2026
PubMed
Summary
This summary is machine-generated.

Intelligent Reflecting Surfaces (IRSs) enhance millimeter-wave (mmWave) vehicle-to-vehicle (V2V) communication by overcoming blockages. Our IRS allocation and relay selection (IARS) scheme boosts reliability and reduces delay for sensor data sharing.

Keywords:
IRScooperative perceptionmillimeter-wave communicationrelay selectionsensor data sharingvehicular networks

Related Experiment Videos

Area of Science:

  • Electrical Engineering
  • Computer Science
  • Transportation Engineering

Background:

  • Connected and automated vehicles generate high-rate sensor data requiring high-capacity, low-latency vehicle-to-vehicle (V2V) communication.
  • Millimeter-wave (mmWave) technology offers high-rate transmission but suffers from non-line-of-sight (NLOS) blockages.
  • Relay forwarding and Intelligent Reflecting Surfaces (IRSs) can improve V2V communication reliability and mitigate NLOS issues.

Purpose of the Study:

  • To enhance mmWave multi-hop V2V communication for vehicular sensor data sharing in urban environments.
  • To address challenges in relay selection and directional transmission coordination with IRS deployment.
  • To propose an effective scheme for IRS allocation and relay selection in V2V networks.

Main Methods:

  • Integrating IRS-assisted link selection into multi-hop relay forwarding strategies.
  • Developing an IRS allocation and relay selection (IARS) scheme.
  • Utilizing a transmission evaluation function considering inter-vehicle distance, link quality, and concurrent transmissions.

Main Results:

  • The proposed IARS scheme significantly improves communication reliability in mmWave V2V networks.
  • The IARS scheme effectively reduces multi-hop communication delay.
  • Enhanced performance supports reliable and timely vehicular sensor data sharing.

Conclusions:

  • IRS deployment is a viable strategy to improve mmWave V2V communication reliability and performance.
  • The proposed IARS scheme offers an effective solution for managing IRS-assisted multi-hop V2V networks.
  • This research contributes to enabling robust sensor data sharing for future urban vehicular systems.