Data Transmission and 4G
& 5G Networks
Presented by: Rajkonna Islam Rupa
What is Data Transmission?
Data transmission is the process of sending digital or analog
data between devices.
Types:
Wired Transmission: Uses cables like fiber optics,
coaxial, and Ethernet.
Wireless Transmission: Uses radio waves, Wi-Fi, and
mobile networks.
Examples: Sending a message, making a call, streaming
videos, browsing the internet.
Types of Data Transmission
Analog Transmission – Uses continuous signals, used in
traditional radio and TV.
Digital Transmission– Uses binary (0s and 1s) for more
accurate and fast data transfer.
Advantages of Digital Transmission:
More reliable
Less signal interference
Faster speeds
Wired vs. Wireless Transmission
Comparison between wired and wireless
transmission:
Wired Transmission:
Uses physical cables (Ethernet, fiber
optics)
Faster and more reliable
Limited mobility
Wireless Transmission:
- Uses electromagnetic waves
- More flexible and mobile
- Can be affected by interference (walls,
weather, other signals).
What is Mobile Data?
Mobile data enables internet access using cellular networks
when Wi-Fi is unavailable.
How it Works:
Your phone connects to a nearby cell tower using radio
waves.
The tower relays your request to the internet via service
providers.
The response is sent back, allowing you to browse,
stream, or communicate online.
Evolution of Mobile Networks
Mobile networks have evolved over time to provide better
speed and features:
1G (1980s): Only voice calls, low-quality sound.
2G (1990s): Added SMS and MMS messaging.
3G (2000s): Enabled video calls, internet browsing.
4G (2010s): Fast internet, HD streaming, better gaming.
5G (2020s+): Ultra-fast speed, AI, IoT, smart devices.
What is 4G?
4G (Fourth Generation) mobile network provides high-speed
internet for smartphones and other devices.
Speed: Up to 100 Mbps (megabits per second).
Features:
HD video calls
Smooth online gaming
Fast web browsing and app downloads
Common 4G technologies: LTE (Long-Term Evolution) and
LTE-Advanced.
What is 5G?
5G (Fifth Generation) mobile network is a revolutionary
upgrade offering ultra-fast speeds.
Speed: Up to 10 Gbps (gigabits per second), 100× faster than
4G.
Key Features:
Faster downloads (movies in seconds!)
Supports AI, VR, and smart city applications
Enables self-driving cars and automated industries
Improves real-time communication with ultra-low latency.
4G vs. 5G – A Comparison
Speed:
4G: Up to 100 Mbps
5G: Up to 10 Gbps (100× faster)
Latency (Delay in data transfer):
4G: ~50ms
5G: ~1ms (almost real-time)
Connectivity:
4G: Supports fewer devices per tower
5G: Supports millions of devices in a small area
Use Cases:
4G: Browsing, video calls, streaming
5G: AI, IoT, virtual reality, smart cities
How Does 5G Work?
5G works by using high-frequency radio waves and advanced
technologies.
How it Works:
Uses millimeter waves (mmWave) for faster data transfer.
Requires many small cell towers (closer together) for better
coverage.
Uses Massive MIMO (Multiple Input Multiple Output) for
stronger signals.
Challenges:
Needs more infrastructure (cell towers and antennas).
Shorter range compared to 4G.
Benefits of 5G
5G offers several advantages over previous generations:
Faster Internet: Download movies and games in seconds.
Low Latency: No lag in online gaming, VR, and real-time
communication.
More Devices Supported: Millions of devices can connect at
the same time.
Better Connectivity: Essential for smart homes, self-driving
cars, and AI applications.
Improved Healthcare: Enables remote surgeries using robots.
Conclusion & Future of Networks
The future of mobile networks is evolving rapidly
Data transmission allows devices to communicate.
4G brought fast speeds, but 5G revolutionized connectivity.
The next step is 6G: Faster, smarter, and even more reliable.
Predictions for 6G:
Speeds up to 1 Tbps (terabit per second)
Holographic communication
AI-powered automation in daily life
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