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How 5G technology works

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5G is one of the most discussed technologies in this decade, what is 5G, and how does 5G technology work?
5g-future-rfpage
5G is the fifth-generation telecommunication and wireless network standard, which will be capable of handling greater data rates and network efficiency.  5G networks will offer scalable and adaptable services; it promises a smarter, faster, and more efficient network. On 3rd April 2019, the first 5G service was introduced in the US by Verizon. Since then, many countries started their 5G deployments.

5G-technology-path
Before we discuss more about 5G, let’s take a look at the technological evolution in the past few decades. GSM and CDMA networks have been implemented in the late twentieth century. The advancement has been continued through 3G, 4G, and LTE advanced networks. The system improved with new techniques to achieve a higher data rate, more user handling, improve latency, and overall network efficiency.

        Where are we today?

5G-Status-Now
Image Source: statista.com
Now we are in the transition phase from LTE advanced to 5G. As of January 2022, LTE has a presence in 240 countries with around 790 network operators and is expected to increase in the coming years.
The 5G Vision: Being Smart
5g_vision
Research shows massive growth in traffic volume for the past five years. This trend will continue at approximately 18 to 25 times higher rate by the year 2025. There will be 75.44 billion wirelessly connected devices by 2025 (according to research by Statista). Current 5G networks are capable of handling ten times more simultaneous connections than the earlier 4G/LTE version.  5G offers an ultra-high-definition multimedia experience and remote access to many real-time services.
Earlier deployment of 5G used a sub-6GHz spectrum for communication. Once 5G networks utilize the millimeter wave spectrum, speed and latency will improve further as the high-frequency spectrum has higher bandwidth.
Performance Targets for 5G – What can we expect?
5g_performance_targets
5G networks have been designed for a smart world, such as smart cities, smart healthcare, transportation, and the most important idea of IoT. The network must be smart, efficient, and cost-effective to handle higher network demands. It should support mobility, better coverage, power efficiency, reliability, and, most importantly, security.

 

Internet of things

iot

IoT is one of the hot technology topics recently. The Internet of Things is an idea of connecting billions of smart devices to the Internet in an organized, efficient, and secure way. Many organizations have already completed a market analysis and evaluated system requirements. It will revolutionize industrial areas, manufacturing, healthcare system, and supply chain management and reflect daily life changes.
5G Technologies – How does it work?

5G technology achieves its expected high efficiency using advanced modulation techniques and network terminologies like:

1. Carrier Aggregation

Carrier aggregation is a technique used in LTE advanced to improve system efficiency. In carrier aggregation, two or more carrier signals are aggregated to support wider bandwidth, allowing even up to 100 MHz.
carrier_aggregation
CA uses three techniques for aggregation: intra-band contiguous: and two carriers are transmitted at neighboring channels (as in the figure).
Intra-band noncontiguous: two carriers are transmitted with channel spacing.
Inter-band: In this technique, different LTE bands are used for transmission simultaneously.

2. Millimeter Waves

Millimeter waves are one of the efficient solutions to solve data rates. It has higher bandwidth to simultaneously transmit and receive data from the base station and UE (handset). Future 5G deployments will make use of 5G-NR spectrum capable of gigabit/second data transfer.

5G-NR-Millimeter-Wave
Read more about Millimeter Waves

Adaptive Bandwidth

5G technology allows handsets to automatically switch to faster internet only when it is necessary and keeps lower data activities while not using any applications. This method preserves battery life significantly.

For example: checking email does not require higher bandwidth.

3. Small Cell Concept

The cell is subdivided into micro and Pico cells to increase network efficiency. Spectrum reusability allows for adding more users in a small geographical area and handling networks more efficiently.
Conventionally, the mobile networks used one base station to cover a large geographical area (2 – 10 KM circle) using a low-frequency spectrum. Since 5G uses a higher spectrum, the waves will get distorted while traveling longer distances. The typical cell concept is 5G will cover very small area compared to the third and fourth generations of networks.
What are Small Cells in 5G Technology

4. MIMO Concept

5g_mimo

MIMO is a transmission technology with the usage of multiple antennas for transmission and reception. Simultaneous data transfer is possible using this technology, thus offering an efficient data rate. The more the number of antennas, the more transmission and reception can be done.

Read more about MIMO Technology in Wireless Communication

5. Wi-Fi offloading

Wi-fi offloading is one of the main features of future networks. It allows the user to connect using a wi-fi network, and the cellular network can be allocated to other users. It would be suitable for some places where cellular network quality is poor, and users still have the option to connect to the network without cellular reception.


6.  Device-to-device communication

5g_d2d_comm

 

D2D communication is a technique where a network authorizes two adjacent devices to communicate with each other directly. The network will control the devices and allow an operator to determine the traffic routing between direct and network paths. During the absents of the network, one device can connect to another device.


7.  Cloud – Radio Network Access

C-RAN is a network technology used for effective communication with centralized information processing carried out remotely within the cloud system. The signal will be processed at a remote location, and the base stations will be connected with the most efficient fiber-optic connections. It gives a lot of advantages in system implementation and maintenance and is highly efficient. Find out How does Cloud Radio Access Network Works

Conclusion

As an improved version of LTE – 4G technology, 5G technology enables us to connect everything with greater speed, low latency, and higher security. At the end of 2022, global subscribers of 5G are expected to be around 580 million, which is a small percentage of the world population. It requires an upgrade of base station capabilities, licenses, spectrum distribution, cooperation between network operators, and device upgrading.

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Comments

  5. Terah says

    “GSM and CDMA network has been implemented in the late nineteenth century” xDD

    “Yes, GSM came into existence in 1991 in Finland, i think few years later CDMA”

    1801-1900 is the 19th century
    1901-2000 is the 20th century

    Reply

  8. Ashwani Kumar says

    LTE is OFDMA as a 4G same as 5G. but all these three orthogonal angle is between 90 degree you can send/receive video, audio and data simultaneously.even you can dedicate these to camera,mic,and wifi for data

    Reply

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