What is 4G technology?
4G Technology is the fourth generation of cellular standards, succeeds 3G and 2G. ITU-R set IMT-Advanced requirements in 2008, demanding peak speeds of 100 Mbit/s for high mobility and 1 Gbit/s for low mobility.
The term 4G is used broadly to include several types of broadband wireless access communication systems, not only cellular telephone systems. One of the terms used to describe 4G is MAGIC – Mobile multimedia, anytime, anywhere, Global mobility support, integrated wireless solution, and customized personal service. As a promise for the future, 4G systems, that is, cellular broadband wireless access systems, have been attracting much interest in the mobile communication arena. The 4G systems will support the next generation of mobile service and fixed wireless networks.
4G Technology is faster than 3G because of Orthogonal Frequency-Division Multiplexing (OFDM), the same technology used in Wi-Fi, ADSL broadband, digital TV, and radio.
OFDM is a technique for squeezing more data into the same amount of radio frequency. It also reduces latency and interference. Data is split up and sent in parallel via small frequency chunks, increasing the network’s capacity.
Multiple-input and multiple-output, or MIMO, is another reason 4G Technology can provide faster speeds. It uses multiple antenna arrays at the transmitter and receiver to improve communication performance.
This allows more data to be transferred without requiring additional bandwidth or drawing more power. The most common configuration currently is a 2×2 MIMO, found in many smartphones and some tablets. A 4×4 setup is also possible and promises even faster speeds, but it is still a little off making its way onto devices. Since different configurations are possible, one phone could provide faster 4G speeds than another.
How 4G Technology works
4G technology, or Fourth Generation technology, operates on a packet-switching network, offering higher data speeds and improved efficiency than its predecessors. Here’s a simplified overview of how 4G technology works
Packet Switching: Unlike earlier generations (2G and 3G), 4G Technology uses packet-switching technology. Data is separated into packets, transmitted separately, and reassembled at the destination. This enhances efficiency and allows for better use of available bandwidth.
IP-based Network: 4G Technology is entirely based on Internet Protocol (IP), facilitating seamless integration with other IP-based services and applications. This shift to an all-IP network simplifies communication and enables a wide range of data-centric services.
Radio Access Technology: 4G networks use advanced radio access technologies, such as Orthogonal Frequency Division Multiple Access (OFDMA) or other frequency-domain equalization methods. These technologies enable the simultaneous transmission of multiple data streams, improving overall network capacity and data rates.
Cellular Architecture: 4G networks consist of a cellular architecture with base stations or cell towers strategically placed to provide coverage. These base stations are connected to the core network, forming the infrastructure for communication between mobile devices and the broader network.
LTE (Long-Term Evolution): LTE is a key technology within the 4G Technology framework. It uses a flat IP-based architecture and supports higher data transfer rates. LTE enhances spectral efficiency, allowing more users to be served simultaneously, and contributes to faster and more reliable connections.
VoLTE (Voice over LTE): 4G Technology introduces Voice over LTE, enabling high-quality voice calls over the data network. This is a departure from traditional circuit-switched voice calls, providing clearer audio and allowing users to simultaneously use voice and data services.
Multiple Input Multiple Output (MIMO): 4G networks often employ MIMO technology, which utilizes multiple antennas at the transmitter and receiver end. This enhances signal quality, reduces interference, and improves overall data rates and network performance.
Seamless Handovers: 4G Technology supports smooth handovers between network cells, ensuring uninterrupted connectivity as users move between areas covered by different base stations. This is crucial for maintaining call quality and data sessions during transitions.
Security Protocols: Robust security measures, including encryption and mutual authentication, are integral to 4G technology. These protocols protect user data and the integrity of the network, safeguarding against various threats and ensuring the privacy of communications.
LTE and WiMax are the two main groups that 4G technology.
WiMax
WiMAX is a broadband wireless data communications technology based around the IEE 802.16 standard, providing high-speed data over a wide area.
WiMAX stands for Worldwide Interoperability for Microwave Access (AXess), a point-to-multipoint wireless networking technology.
WiMAX technology can meet the needs of a large variety of users, from those in developed nations wanting to install a new high-speed data network very cheaply without the cost and time required to install a wired network to those in rural areas needing fast access where wired solutions may not be viable because of the distances and costs involved. Additionally, it is being used for mobile applications, providing high-speed data to users on the move.
WiMAX technology uses some key technologies to enable it to provide high-speed data rates
- OFDM (Orthogonal Frequency Division Multiplex): OFDM has been incorporated into WiMAX technology to provide high-speed data without selective fading and other issues of other forms of signal format.
- MIMO (Multiple Input Multiple Output): WiMAX technology uses multipath propagation using MIMO. By utilizing the multiple signal paths, MIMO enables operation with lower signal strength levels or allows for higher data rates.
During a phone call, when the caller sends the information by connecting to the WiMAX network, this information is first processed to the internet home and then spread widely. This transmission often happens, and problems arise regarding spectrum, bandwidth, and data. If the range is not comprehensive, shorten bandwidth and specific data through the internet. The arrival of 4G Technology has diminished all the fears of lower bandwidth, narrow spectrum, and amount of data sent/received. This WiMAX technology has a high-speed data transfer rate with additional capacity for subscribers and is ready to carry a large amount of data. Previous generations suffered because of low speed, ultimately covered in the 4G.
LTE
LTE Network is broadly known as wireless broadband. It is introduced to entertain the benefit of having the same quality phone calls and internet service. The characteristic of this LTE network is that it has transformed the voice data into data frames to transmit this piece of information in the same way as other types of data are sent. It has merged the two services into one type, removing the traditional phone service mechanism.
LTE technology lends a hand to 3G network service providers CDMA and GSM via the current spectrum and increases their workability by up to 20 Mbps using the radio wave mechanism. LTE uses the same infrastructure as 3G for its functions.
LTE is developed on radio wave technology. This increases the speed and amount of data allowed through the same bandwidth, resulting in lower costs.
As LTE is compatible with 3G technology, it not only increases the speed but also prevents the need for a new network and can work through the same infrastructure. LTE not only supports the functions of 3G but also incorporates some newer ones. LTE uses MIMO (Multiple input outputs) to send and receive massive negative data, which will overload the base station networks.
Improvements from previous generations
- Seamless mobility (roaming)
- Roam freely from one standard to another
- Integrate different modes of wireless communications – indoor networks (e.g., wireless LANs and Bluetooth); cellular signals; radio and TV; satellite communications
- 100 Mb/s full mobility (wide area); 1 Gbit/s low mobility (local area)
- IP-based communications systems for integrated voice, data, and video
- Open unified standards
- Stream Control Transmission Protocol (SCTP)
- Successor to “SS7”; a replacement for TCP
- Maintain several data streams within a single connection
- Service Location Protocol (SLP)
- Automatic resource discovery
- Make all networked resources dynamically configurable through IP-based service and directory agents
Supporting technologies in 4G network
1. Voice
VoLTE stands for Voice over LTE and is a new protocol for transmitting voice data over the LTE network. While 2G and 3G networks are circuit-switch based, 4G or LTE networks utilize Packet Switching. When a call is made over a 2G or 3G network, a certain amount of network bandwidth is assigned as a pipeline, which does not terminate until the call ends. On a VoLTE network, voice calls are broken into packets of information, sent over the entire data pipeline, and then reconstructed at the receiver’s end. Voice information can be carried over a higher bandwidth pipe, improving call quality.
One of the critical advantages of VoLTE is that it enables high-definition (HD) voice calls, providing more apparent and natural audio quality compared to traditional circuit-switched voice calls. Additionally, VoLTE supports faster call setup times, allowing users to connect to calls more quickly.
Here are some other benefits and features of VoLTE
- Enhanced Call Quality: VoLTE supports a broader range of audio frequencies, improving call clarity and a more natural-sounding conversation.
- Reduced Call Setup Time: VoLTE has faster call setup times than traditional networks. This means that users experience quicker connection times when initiating or receiving calls.
- Simultaneous Voice and Data: Unlike older networks where you can call or use data, VoLTE allows simultaneous voice and data usage. This is particularly useful for video calling or accessing the internet while on a call.
- Efficient Use of Network Resources: VoLTE utilizes the LTE network’s packet-switched architecture more efficiently, optimizing available bandwidth and reducing congestion on the network.
- Improved Battery Life: VoLTE can be more power-efficient than traditional circuit-switched networks, leading to improved battery life on mobile devices during voice calls.
- Rich Communication Services (RCS): VoLTE often integrates with RCS, enabling advanced messaging features such as read receipts, file sharing, and other multimedia capabilities, making it more than a voice service.
- Global Interoperability: As VoLTE becomes more widespread, it facilitates global interoperability, allowing users to make high-quality voice calls across different LTE networks worldwide.
2. Data
4G networks is based on an all-Internet protocol (IP) packet switching instead of circuit-switched technology and use OFMDA multi-carrier transmission methods or other frequency-domain equalization (FDE) methods instead of current spread spectrum radio technology. 4G networks can offer smooth handovers across different networks without data loss and provide a high quality of service for next-gen media.
One of the most important aspects of 4G technology is the elimination of parallel circuit-switched and packet-switched network nodes using Internet Protocol version 6 (IPv6). The currently used standard, IPv4, has a finite limitation on the number of IP addresses assigned to devices, meaning duplicate addresses must be created and reused using network address translation (NAT). This solution only masks the problem instead of definitively solving it.
IPv6 is a critical component in the transition to 4G technology, addressing the limitations of IPv4. Adopting IPv6 in 4G networks provides an extensive pool of unique IP addresses, ensuring that every device connected to the network can have a globally unique identifier. This eliminates the need for network address translation (NAT) and the associated complexities, allowing for more straightforward and efficient communication between devices.
3. Security
Mobile operators face unique risks due to the multitude of threat vectors involved; threats exist at the device, network, and application layers. Each must be considered and secured to protect the network and subscribers from attack.
LTE is designed with robust cryptographic techniques and mutual authentication between LTE network elements with security mechanisms built into its architecture.
4G Technology makes use of the IPV6 address scheme. This might make it possible for each cell device to have its IP address. Currently, the security problem is solved using multiple layers of encryption of the protocol stack. There are disadvantages to this scheme, such as wasted power, wasted energy, and a more significant transmission delay. In 4G Technology, there is a concept of interlayer security where only one layer is configured to encrypt data.
Security is a critical aspect of mobile networks, and both LTE (Long-Term Evolution) and 4G technologies have incorporated robust security measures to safeguard against various threats. Here’s a further elaboration on security considerations
1. LTE Security Measures
- Cryptographic Techniques LTE employs cryptographic solid techniques to protect data transmission. This includes encryption algorithms such as Advanced Encryption Standard (AES) for securing user data and signaling within the network.
- Mutual Authentication LTE ensures mutual authentication between network elements, verifying the identity of the user device and the network. This helps prevent unauthorized access and protects against man-in-the-middle attacks.
- Built-in Security Architecture LTE is designed with security mechanisms integrated into its architecture. This includes secure essential exchange procedures and protocols to ensure the confidentiality and integrity of data.
2. IPv6 Address Scheme in 4G Technology
- Individual IP Addresses The adoption of IPv6 in 4G allows for many unique IP addresses, enabling each cell device to have its IP address. This facilitates end-to-end communication without needing network address translation (NAT), reducing complexities associated with address assignment.
- Security Challenges While the individual IP addresses enhance connectivity, they pose security challenges. The increased number of devices and the unique addressing scheme can attract malicious activities. However, security features in 4G Technology mitigate these risks.
3. Interlayer Security in 4G
- Optimizing Encryption To address the potential downsides of multiple layers of encryption, 4G Technology introduces the concept of interlayer security. This involves configuring only one layer for data encryption, optimizing resource use, and minimizing power consumption.
- Reducing Transmission Delays By streamlining the encryption process, 4G aims to reduce transmission delays, ensuring a more efficient use of network resources and a better user experience.
4. Challenges and Continuous Improvements
- Power and Energy Efficiency While security measures are essential, balancing security with power and energy efficiency is challenging. Ongoing efforts focus on optimizing protocols to reduce power consumption and improve efficiency.
- Continuous Adaptation Security in mobile networks is an evolving field, and operators continually adapt to emerging threats. Regular updates, patches, and improvements in security protocols help address new challenges and vulnerabilities.
Application of 4G
4G technology has brought about significant advancements in mobile communication, enabling a wide range of applications and services. Some critical applications of 4G include:
1. High-Speed Internet Access
- 4G provides faster data speeds than its predecessors, making it ideal for high-speed internet access on mobile devices. Users can browse the web, stream videos, and download files at significantly improved speeds.
2. Mobile Video Streaming
- The increased bandwidth of 4G networks supports high-quality video streaming on mobile devices. Users can enjoy seamless streaming of movies, TV shows, live events, and video conferences without buffering issues.
3. Voice over LTE (VoLTE)
- 4G networks enable Voice over LTE technology, providing high-definition voice calls with superior audio quality. VoLTE also allows for simultaneous voice and data usage during calls.
4. Online Gaming
- The low latency and high data speeds of 4G make it suitable for online gaming. Gamers can enjoy real-time multiplayer experiences with reduced lag, enhancing mobile device gaming experience.
5. Mobile Commerce and Banking
- 4G facilitates secure and fast mobile transactions, enabling users to use mobile banking, make digital payments, and conduct e-commerce through dedicated mobile apps.
6. Location-Based Services (LBS)
- The improved accuracy and responsiveness of 4G networks contribute to more efficient location-based services. The enhanced network capabilities benefit applications such as navigation, geotagging, and location-based recommendations.
7. Internet of Things (IoT)
- 4G Technology provides a foundation for connecting a vast number of IoT devices. This includes smart home devices, wearables, and other connected sensors, fostering the growth of the Internet of Things ecosystem.
8. Enterprise Applications
- Businesses leverage 4G for mobile enterprise applications, enabling employees to access corporate resources, conduct video conferencing, and collaborate. This enhances productivity and flexibility in the workplace.
9. Smart Cities and Infrastructure
- 4G Technology supports the development of innovative city initiatives by providing connectivity for various sensors, cameras, and IoT devices. This enables efficient traffic management, environmental monitoring, and public safety applications.
10. Telemedicine
- 4G facilitates telemedicine services, allowing healthcare professionals to conduct remote consultations, share medical data, and monitor patients using mobile devices. This is especially crucial for reaching underserved or remote areas.
11. Augmented Reality (AR) and Virtual Reality (VR)
- The high data speeds and low latency of 4G enhance the performance of AR and VR applications. Users can enjoy immersive experiences like AR gaming, virtual tours, and interactive content.
In conclusion, the advent of 4G technology has undeniably transformed the landscape of mobile communication, ushering in an era of unprecedented speed, reliability, and connectivity. As we bid farewell to the limitations of earlier generations, 4G has emerged as the driving force behind many applications that have reshaped how we live, work, and interact with the digital world.
The primary hallmark of 4G lies in its ability to deliver high-speed internet access to mobile devices, empowering users to engage in a myriad of activities seamlessly. Whether streaming high-definition videos, engaging in real-time online gaming, or conducting business transactions, 4G Technology has elevated the mobile experience to new heights.
Voice over LTE (VoLTE) technology has redefined communication, providing crystal-clear audio quality and simultaneous voice and data usage during calls. Mobile commerce and banking have flourished under the umbrella of 4G, offering secure and swift transactions through dedicated mobile applications.
4G’s impact extends beyond personal use, infiltrating the business realm with enhanced enterprise applications. Employees can now access corporate resources, participate in video conferences, and collaborate in real-time from virtually anywhere, fostering increased productivity and flexibility.
Moreover, the development of smart cities and the Internet of Things (IoT) has been made possible through the robust connectivity and efficiency of 4G networks. From intelligent traffic management to remote healthcare monitoring, 4G Technology has laid the groundwork for a more interconnected and technologically advanced world.
As we revel in the accomplishments of 4G Technology, it’s essential to acknowledge that this technology serves as a stepping stone for even more significant advancements. The baton is now passed to the next generation, 5G, promising even faster speeds, lower latency, and a more extensive network of connected devices.
In retrospect, 4G Technology has been a game-changer, bridging gaps and bringing the benefits of high-speed internet to the palm of our hands. It has set the stage for a more interconnected and digitally driven future where innovation knows no bounds. As we look forward to what the future holds, it’s clear that the legacy of 4G will continue to resonate in the ever-evolving tapestry of mobile communication.