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HOW 5G WORKS TO CHANGE THE WORLD

2021-04-06 来源: 51Due教员组 类别: Essay范文

51Due教员组今天给各位留学生带来一篇纯原创通信代写范文,讲的是5G如何改变世界,希望这篇可以帮助到各位留学生,同时需要代写也可以直接联系我们51Due客服vx(vx:Jenny_dynh)进行咨询。
HOW 5G WORKS TO CHANGE THE WORLD
The world of communications has evolved rapidly. From 2G in the 1990s to 4G in 2010, the industry is home to the brightest people in the world, studying top technology and bringing endless convenience and well-being to society. 5G is a short name of the fifth-generation mobile communication technology. Much of today's mobile Internet benefits from development of mobile technology. To learn about how the 5G network  may change how people live in the future, it must address the applications that come with this technology. 

FEATURES OF 5G
5G technology includes advanced features in almost all previous generations of mobile communications. Users can use 5G technology for mobile phones and other mobile communication devices to surf the Net, just as laptop broadband Internet access. With the use of 5G, people can take high-quality pictures; dial speed will be faster; audio player will have a better quality. Routers and switch technologies used in 5G networks will provide high connectivity. The 5G technology distribution network connects nodes within the building and houses and can deploy a variety of wired or wireless network connections. It will have a global standard that allows users to connect to multiple wireless access technologies simultaneously for seamless mobility. 5G network will be user-centric network. Thus, the 5G enables people to live in a smart house in the future. The quality of service to users will be a major consideration of 5G, enabling users to simultaneously connect multiple wireless access technologies and switch between them. 

The development of 5G has a good basis. Given the good technology architecture of 4G , it is much easier for 5G to develop new technologies on the former basis . The 5G network has three main features: the high rate of enhanced mobile broadband (eMBB), the Massive Machine Type Communication (mMTC) and Ultra Reliable Low Latency Communications (URLLC). 

One of the biggest advantages of the future 5G is the high network rate available to users. Although 4G is not slow now and meets the needs of most of people in terms of daily needs, it pales before 5G. The goal for 5G is reaching a maximum of 10Gbps (defined by METIS). Nowadays, mobile networks is marked by a relatively low frequency band, which is known for their excellent propagation performance. It thus enables operators to realize coverage in a large area with a low cost as a result of a few base stations. However, one of the shortcomings is that the continuous frequency resources in the low frequency band are very valuable. In a lot of countries, bidders will be allowed to purchase the right to use the frequency band, which is allocated by the government in China. In 4G LTE, the maximum frequency range of a single carrier is 20 MHz. Carrier aggregation technology is to use multiple non-consecutive carriers together for a higher rate, but 5G is expected to exceed it in the aspect. 

ENHANCED MOBILE BROADBAND 
A feature of 5G is high frequency. The limitation of high-band frequency resources leads to a not fully used resources of it. This is exactly what 5G can take advantage of with the use of large-scale MIMO. The difference between large-scale MIMO and MIMO is as follows: there is a significant increase in the number of antennas, resulting in significant changes of the spatial characteristics of the channel, and the signal processing methods. Massive MIMO introduces a spatial domain approach by using a large number of antennas at the base station and synchronizing them, thus achieving several decades of gain in both spectrum and energy efficiency. Massive MIMO is the key technology for improving system capacity and spectrum utilization in next-generation mobile cellular network-5G. It is possible to integrate the antenna array in a small area. An increase in the number of antenna elements can leads to other gains, in combination with beam forming, and beam-tracking technology to make up for the limitation of high-frequency communication. In the future, people can upload and download 3D video at high speed, and realize real-time play of 4K or even 8K video streams. Also, combined with cloud technology, work, life and entertainment are all delivered to the AR. Media everywhere changes the way the media is distributed. 

MASSIVE MACHINE TYPE COMMUNICATION (MMTC)
5G will support the development of Internet of Things technology through technical means. Mobile Internet and Internet of Things are two major driving forces for the future development of mobile communications. Mobile Internet has overturned the traditional mobile communication business model, to provide users with an unprecedented experience, and a profound impact on people's work and life in all aspects. The Internet of Things expands the service range of mobile communications, extending the communication from person to person to the intelligent interconnection of things, things and people. It is thus enabling the penetration of mobile communications technology into a wider range of industries and fields. The 5G technology will also promote the development of the Internet of Things. First of all, it can address the core issue of IoT technology: Power consumption is the largest problem that plagued the application of IoT technology. As there are too many nodes in the Internet of Things, and due to the restrictions, it is hard for the terminal to charge it. By limiting the rate of terminals, the bandwidth, the transmit power of terminals and the antenna complexity are decreased. 5G will save more power by reducing the signaling overhead and employ non-orthogonal multiple access for more terminal access.


ULTRA RELIABLE LOW LATENCY COMMUNICATIONS (URLLC)
With the development of 5G, the delay will be decreased to a much lower level, leading to more space for applications demanding less delay. One TTI in LTE is 1ms, and 5G shortens the delay on the physical layer by reducing each sub frame in the time domain with the optimized design of the frame structure. 5G with low latency can be applied to telemedical operations, remote driving car networking automatic piloting, and industrial control.

NEW TECHNOLOGY OF 5G
With the arrival of the 5G era, the terminal antenna and RF terminal will usher in significant changes. The first is the increase in the number of antennas. For example, one of the key 5G technology is Massive MIMO technology. It will use more than 12 antennas. More importantly, the advent of the 5G era will also bring about the Internet of Things. The wireless interface of the Internet of Things also requires antenna and RF devices.  Second, the 5G communication system has higher requirements on the antennas and RF front ends, and can also prompt the relevant products to gradually shift to the high-end fields, which is of great significance to increase the added value of the products. 

At the same time, 5G promoted the new development of FWA. FWA is useful to provide broadband services to homes and small and medium-sized businesses, a particularly attractive concept in the absence of infrastructure to provide wired broadband over copper, fiber or hybrid solutions. Compared to 4G, 5G is marked by cost-effective FWA solutions on a large scale because of its 10 to 100 times the capacity offered by 4G. At present, in LTE with 40MHz bandwidth, FWA usually functions as an additional part to Mobile Broadband (MBB), which only get stronger as LTE develops. The further development of 5G is likely to bring FWA to a whole new level. 


CURRENT LEVEL OF DEVELOPMENT 
Currently, there is a piece of news that South Korea has successfully launched the fifth generation of mobile communications technology. For mobile phones using the technology, the speed of wireless download is about 3.6G per second, which is called Nomadic Local Area Wireless Access. 

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