无线通信G介绍英文论文ABriefIntroductionAboutGNetwork

无线通信G介绍英文论文ABriefIntroductionA

boutGNetwork

The following text is amended on 12 November 2020.

A Brief Introduction About 5G Network

Jia

Abstract

With the rapid development of wireless technologies, theconcept of the Fifth Generation (5G) wireless communication system started to emerge. But most people know little about 5G，including some aspects of 5G wireless

communication networks ,just like what 5G is about: what are the building blocks of core 5G system concept, what are the main challenges and how to tackle them. Besides, A number of countries and organizations working on 5G, 5G development situation in China is of concern to everyone, China also needs to have its own place in such a competitive environment. Keywords:

5G Network, history, Core concept, Challenges, Solutions, In china Table of Content

1. Introduction

5G (Fifth-generation mobile communications) is a new generation of mobile communication mobile communication systems for 2020, with high spectral

efficiency and low power consumption, in terms of transfer rate and resource utilization improvement over 4G system 10 times, its wireless coverage

performance and user experience will be significantly improved. 5G will be closely integrated with other wireless mobile communication technology,

constitute a new generation of ubiquitous mobile information network, to meet future mobile Internet traffic 1000x development needs in 10 years.[1]

In this paper I will show you some latest research and development

history,what are the building blocks of core 5G system concept, what are the main challenges and how to tackle them firstly. In the rest of paper I will show how 5G development in China in recent years and my conclusion after research literature.

2. Research and development history

February 2013, the EU announced that it would grant 50 million euros to

accelerate the development of 5G mobile technology, plans to launch a mature standard in 2020. [2][3]

May 13,2013,South Korea's Samsung Electronics Co., Ltd. announced that it has successfully developed the 5th generation mobile communication (5G) core technology, which is expected to begin in 2020 to commercialization. The technology can transmit data at ultra-high frequency 28GHz to 1Gbps per second speed, and the maximum transmission distance of up to 2 km. In contrast, the current fourth generation Long Term Evolution (4GLTE) and services of only the transmission rate 75Mbps. Prior to the transmission bottleneck is widely believed that a technical problem, while Samsung

Electronics is the use of 64 adaptive array antenna elements transmission technology to crack this problem. Compared with the transmission speed of 4G technology in South Korea, 5G technology is hundreds of times faster. Using this technique, download a high-definition (HD) movie just need 10 seconds. Back in 2009, Huawei has launched the early research related technologies, and to show the prototype of the 5G base in later November 6, 2013,Huawei announced that it would invest $600 million in 2018 for the 5G technology development and innovation, and predicted that users will enjoy 20Gbps commercial 5G mobile networks in 2020.

May 8, 2014, the Japanese telecom operator NTT DoCoMo announced officially, Ericsson ,Nokia, Samsung and other six manufacturers to work together, began testing override 1000 times than existing 4G networks the carrying capacity of the high-speed network 5G network, the transmission speed is expected to 10Gbps. Outdoor testing scheduled to commence in 2015, and expects to begin operations in 2020.[3]

March 1, 2015, the British \Daily Mail\has successfully developed and tested for data transmission within 100 meters per second data transfer of up to 125GB, is times the 4G network, in theory, a 30 seconds to download movies, adding that investment in public test in 2018, 2020 officially put into commercial use.[4]

February 11, 2015 in the afternoon news, IMT-2020 (5G) to promote the group (hereinafter referred to as \concept of white paper. White Paper from the mobile Internet and networking composed mainly of application scenarios, business needs and challenges of starting summed continuous wide area coverage, high reliability of the four major technology 5G scene of high capacity, low power consumption and low

latency connection. Meanwhile, the combination of core technologies and key capabilities 5G and 5G concept proposed by the \of key technologies\

March 3,2015,the European Economic and Social Commission for Digital Furusawa Ottinge officially announced the EU's vision of public-private partnerships 5G, and strive to ensure that the right to speak in the next generation of mobile technology in Europe in the global said that, 5G vision of public-private partnership involves not only fiber, wireless or satellite communications network integrated with each other, will also use the

software-defined networking (SDN), network functions virtualization (NFV), Mobile Edge computing (MEC) and Fog Computing technology. In the spectrum, the EU's vision of public-private partnership will be designated 5G hundreds of megahertz to improve network performance, 60 GHz and higher frequency bands will also be taken into account.

A number of countries and organizations announced, 5G network will be operational between 2020 ~ 2025. 3. Core Concept

What is 5G I believe many people will be so questionable when see 5G. Judging from the word meaning, 5G refers to the fifth generation of mobile

communications. However, how should it define Currently, the global industry for 5G concept not yet agreed. China IMT-2020 (5G) group released the White Paper considers the concept 5G, 5G integrated key capabilities and core technology, 5G concept by \

technologies\rate user experience\antenna array, ultra-dense networking, new multi-site, full-spectrum access and new network architectures.

Recalling the course of development of mobile communications, each generation of mobile communication systems can be defined by sexual performance

indicators and signs of key technologies. Wherein, 1G using FDMA, only analog voice services; 2G mainly using TDMA, can provide voice and low-speed digital data services; 3G to CDMA technology is characterized by user peak rate of 2Mbps to reach tens of Mbps, support multimedia data services; 4G OFDMA technology as the core, the user peak rate of up to 100Mbps ~ 1Gbps, can support a variety of mobile broadband data services.

5G key competencies richer than previous generations of mobile communications, user experience, speed, density of connections, end to end delay, the peak rate and mobility and so will be the 5G key performance indicators. However, unlike the case in the past only to emphasize different peak rate, the

industry generally believe that the rate of the user experience is the most important performance indicators, it truly reflects the real data rate

available to the user, and the user experience is the closest performance.

Based on the technology needs of the main scene 5G, 5G user experience rate should reach Gbps magnitude.

Faced with diverse scenes of extreme performance demands differentiation, 5G cannot have solutions for all scenarios. In addition, the current wireless technology innovation has diversified development trend, in addition to the new multi-access technology, large-scale antenna array, ultra-dense network, the whole spectrum access, the new network architecture, also is considered to be the main technical can play a key role in the major technology scene. [5]

4. Challenges and Solutions The new network New multi-access In this part I outline some observed research challengesand directions in the mobile network development and show some may become the future trends and solutions that may lead to improved network performance while meeting the Gbps user constantly increasing user demands. 5G Transport Challenge Large-scale antenna In order to understand the 5G transport challenges one must understand how 5G Ultra-dense network may evolve the radio access the various initiatives that are looking into 5G, the new network we can defines 5G in terms of scenarios which the next generation wireless access networks will have to support. [6]A total of five future scenarios Figure 1 - 5G have been defined,namely amazingly fast (users want to enjoy instantaneous

network connectivity), great service in a crowd, ubiquitous things

communicating ., effective support to Internet of Things), super real time and reliable connections, and best experience follows you. Each of these scenarios introduces a challenge .

Three of these challenges ., very high data rate, very dense crowds of users and mobility) are more traditional in the sense that they are related to continued enhancement of user experience and supporting increasing traffic volumes and mobility. Two emerging challenges, very low latency and very low energy, cost and massive number of devices, are associated with the

application of wireless communications to new areas. Future applications may be associated with one or several of these scenarios imposing different

challenges to the network. In METIS twelve specific test cases were defined and mapped onto the five scenarios. The selected test cases essentially

sample the space of future applications. Once technical enablers that fulfill there quirements for these test cases are defined, it is expected that other applications subject to the same fundamental challenges, will successfully be supported. As a consequence, defining technical enablers for the 5G test cases means also defining technical solutions to the 5G challenges.

While METIS[7] is focused on wireless access, the challenges defined for 5G are expected to impact also the transport. Support for very high data rates will require both higher capacity radio access nodes as well as a densification of radio access sites. This, in turn, translates into a