Related Experiment Video
Updated: Jun 3, 2025
07:45
Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
10.8K
A WSN and LoRa Hybrid Multimedia Transmission Protocol for Scalar Data and Image Transmission
Quoc Hop Ta1, Van Khoe Ta2, Trang Tien Nguyen3
1Ubicom Laboratory, Department of Electrical, Electronic and Computer Engineering, University of Ulsan, Ulsan 44610, Republic of Korea.
Sensors (Basel, Switzerland)
|January 8, 2025
Summary
This study introduces a cooperative protocol for reliable and fast image transmission using LoRa and wireless sensor networks (WSN). It achieves high-speed data transfer with minimal packet loss, outperforming existing methods.
Area of Science:
- Wireless Communication
- Network Protocols
- Data Transmission
Background:
- Wireless Sensor Networks (WSNs) face challenges in reliable and fast data transmission, especially for image data.
- Existing protocols often suffer from control message overhead and interferences like data collisions.
Purpose of the Study:
- To develop a cooperative protocol for efficient image and scalar data transmission.
- To leverage the distinct characteristics of LoRa and WSNs for enhanced performance.
Main Methods:
- The proposed protocol integrates RT-LoRa for scalar data and a WSN-based pipelined method using LoRa for image transmission.
- It eliminates control message overhead and interferences common in WSNs.
Main Results:
- Achieved approximately 96% image transfer rate without packet loss for 24 KB images in ~0.3s.
- Demonstrated 100% transfer rate with tolerance for one packet loss.
- Showcased a ~25% speedup compared to recent pipelined protocols.
Conclusions:
- The cooperative protocol offers reliable and fast image transmission.
- It effectively overcomes limitations of traditional WSNs for high-quality image transfer.
Related Concept Videos
01:22Scalar and Vectors
1.2K
In mechanics, commonly used terms like force, speed, velocity, and work can be classified as either scalar or vector quantities. A scalar is a physical quantity that can be described by its magnitude alone and does not require any directional components. Examples of scalar quantities are mass, area, and length.
Scalar quantities with the same physical units can be added or subtracted according to the usual algebra rules for numbers. For example, a class ending 10 min earlier than 50 min lasts...
Scalar quantities with the same physical units can be added or subtracted according to the usual algebra rules for numbers. For example, a class ending 10 min earlier than 50 min lasts...
1.2K
01:21Couples: Scalar and Vector Formulation
234
One might wonder how the captain of a large ship can navigate through the ocean with just a turn of the steering wheel. The answer lies in the concept of two parallel forces that are equal in magnitude and opposite sense, creating a couple moment.
A couple moment is a rotational force that tends to rotate the steering wheel. The wheel's rotation can either be in a clockwise or anticlockwise direction. The right-hand rule is a helpful method for determining the direction of a couple moment....
A couple moment is a rotational force that tends to rotate the steering wheel. The wheel's rotation can either be in a clockwise or anticlockwise direction. The right-hand rule is a helpful method for determining the direction of a couple moment....
234
01:06Scalar and Vector Triple Products
2.3K
Two vectors can be multiplied using a scalar product or a vector product. The resultant of a scalar product is scalar, while with vector products, the resultant is a vector. These rules of the scalar or vector product between two vectors can be applied to multiple vectors to obtain meaningful combinations. The scalar triple product is the dot product of a vector with the cross product of two vectors.
The scalar triple product is the dot product of a vector with the cross product of two vectors....
The scalar triple product is the dot product of a vector with the cross product of two vectors....
2.3K
01:28Scalar Notation
652
Scalar notation is a useful method for simplifying calculations involving vectors. When vectors are added or subtracted, their components can be added or subtracted separately using scalar notation. For instance, force, a vector quantity, can be broken down into its x and y components, called rectangular components, and then the magnitude and direction of these components can be determined using trigonometric functions.
Consider a man pulling a rope from a hook in the northeast direction. The...
Consider a man pulling a rope from a hook in the northeast direction. The...
652
01:31Energy Stored In A Coaxial Cable
1.4K
A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic...
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic...
1.4K
01:11Scalar Product (Dot Product)
8.2K
The scalar multiplication of two vectors is known as the scalar or dot product. As the name indicates, the scalar product of two vectors results in a number, that is, a scalar quantity. Scalar products are used to define work and energy relations. For example, the work that a force (a vector) performs on an object while causing its displacement (a vector) is defined as a scalar product of the force vector with the displacement vector.
The scalar product of two vectors is obtained by multiplying...
The scalar product of two vectors is obtained by multiplying...
8.2K