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HCIA-5G Learning Guide 1 5G + New Technology Innovative Application We learned in the previous chapter about 5G networking modes and key technologies. We explored why non-standalone (NSA) and standalone (SA) modes are needed and how they are implemented. We looked at 5G's key technologies from three aspects: radio access, transport, and core networks. We also understood that 5G boasts a flexible architecture, lending itself to meeting the requirements of different industries. Alongside rapidly developing 5G, we have seen quite a number of emerging and trending technologies, such as big data, artificial intelligence (AI), Internet of Things (IoT), and cloud computing. What dynamics will occur when 5G is integrated with these technologies? In this chapter, we will focus on how the convergence of 5G with these technologies will help grow various vertical industries. 1.1 Convergence with ICT Promotes the Digital Economy 1.1.1 What Is the Digital Economy? Throughout the history of mankind — from the agricultural and industrial ages to the information age — every technological or industrial revolution promotes a great progress in productivity, driving human civilization to the next level. As is in the agricultural age where hunting, planting, and livestock farming were the primary productive forces, the industrial age was characterized by relying on steam engines and electricity to boost productivity. In the information age represented by the Internet, information has evolved into the prime factor of production and constitutes the essential technical and material basis of the information-driven society. In the information age, the Internet has profoundly revolutionized the way people work and live and injected strong impetus to global economic development. The world is now stepping into the age of the digital economy — a new form of economic and social development that uses digital knowledge and information as a primary production element. Driven by digital technology innovation, it relies on modern information networks, HCIA-5G Learning Guide enabling the deep integration of digital technologies and the real economy to improve the level of digitization and intelligence in traditional industries and accelerate the reconstruction of economic development and governance models. The power of technology promotes mankind to discover new frontiers. The Internet, big data, cloud computing, and 5G are leading the world to a higher level of productivity, digitalization, and intelligence. The world is undergoing a new development phase of the digital economy, and we are on the edge of the new era. As a new form of social and economic progress in the information age, the digital economy facilities achieving both economics of scope and economics of scale, becoming a new driving force for global economic growth. 1.1.2 ICT Reshapes the Digital Economy ICT is reshaping economic growth patterns and social governance models. As the digital economy further develops into a new era, the digital economy has pivoted from the consumer Internet to the industrial Internet. The industrial Internet connects new digital technologies, such as 5G, AI, cloud computing, big data, and IoT, with industrial development and social governance, enabling them to improve internal efficiency and external services and achieve leapfrogging development. Its essence is to allow enterprises to maximize the potential of digital technologies for improving efficiency and optimizing configuration, while coupling enterprises with data throughout industry chains1 to improve internal efficiency and external services. For example, by encouraging the development of smart manufacturing and smart city, governments aim to improve industry competitiveness and administrative efficiency through new ICT technologies. China Academy of Information and Communications Technology (CAICT) predicts that, between 2020 and 2025, 5G will directly drive a total economic output of CNY10.6 trillion and generate an additional CNY3.3 trillion in economic value in China. Indirectly, these value will increase to about CNY24.8 trillion and CNY8.4 trillion, respectively. By 2025, 5G is expected to directly create more than 3 million jobs. This shows that 5G will be a major contributor to economic growth. 5G will change people's lives and production methods, and will even bring fundamental changes in society. 5G will become a key infrastructure for comprehensive economic and social digital transformation. Over the next two to three decades, an intelligent society will become reality, where all things are aware, connected, and intelligent. 1 "5G + Cloud + AI": Engine for the New Era of Digital Economy, CAICT HCIA-5G Learning Guide 1. Everything in the physical world will be sensed and converted into digital signals. Multi-sensory channels (such as temperature, space, touch, hearing, and vision) will enable situational awareness and interaction to deliver an immersive user experience. 2. The full connectivity will bring all data online, providing wide-ranging connectivity across cities, mountains, and even outer space to enable intelligence. 3. Everything will become intelligent thanks to big data and AI, and individuals, families, industries, and cities will gradually embrace digital twins to enhance the physical world. A second world — a digital one — will emerge to augment the physical world, enriching life. All of this will be made possible as ICT technologies continue to advance. ICT infrastructure will be the foundation of an intelligent world and based on the device-network-cloud IT architecture. Devices include mobile phones, cameras, and sensors, and they sense the physical world. Networks can be mobile (such as NB-IoT, 4G, and 5G) or fixed (such as broadband and private lines). Cloud refers to cloud computing. In the future, all device-sensed data will be transmitted to and pooled on the cloud through the networks to form big data, based on which AI analytics will be reality. For example, cameras and sensors in cities will collect various data and send the data to cloud to form big data that can enhance smart security while improving urban management efficiency. This means that 5G enables smart city to usher in a new opportunity of development by providing connectivity to everything anytime and anywhere. With such connectivity, each person, thing, and organization in digital-twin cities will be connected in real time, making them seamlessly integrated and interactive with the physical cities and enabling all intelligent connections to act as distributed super brains. The cities will become more intelligent to HCIA-5G Learning Guide fulfill various personalized needs2. None of these will be possible without the high bandwidth, low latency, solid reliability, and massive capacity enabled by 5G. In the future, 5G, cloud, AI, and IoT technologies will enable vertical industries. 5G and cloud will become the foundation for information-driven development. The device-network-cloud architecture will further enable top- level applications required to improve overall efficiency. 5G capabilities will play a significant role in achieving these goals. 1.2 Characteristics and Current Developments of New Technologies 1.2.1 Internet of Things 1.2.1.1 What Is the Internet of Things? The term "Internet of Things (IoT)" was first coined by Massachusetts Institute of Technology (MIT) in 1999. The original concept of IoT refers to the radio frequency identification (RFID)-enabled technologies and devices, which interoperate within the Internet based on agreed communications protocols to intelligently identify and manage objects as well as interconnect, exchange, and share information. IoT is envisaged as a network of things all connected to the Internet with the supportfrom sensors, such as QR code readers, RFID devices, infrared sensors, global positioning systems, and laser scanners, to realize information exchange and communication, thereby enabling smart tagging, positioning, tracking, monitoring, and management3. IoT is an Internet for thing-to-thing connection. This means that its core and foundation are still the Internet, with the connections extended and expanded to things for communication and information exchange between them4. The concept of IoT dates back to Bill Gate's 1995 book titled The Road Ahead, in which he mentions the idea about the Internet of Things. It attracted little attention due to the development of wireless networks, hardware, and sensors. In 1998, MIT creatively proposed an IoT-like concept, which was then called the EPC system. In 1999, the Auto-ID Center in the US first proposed the concept of IoT based on item coding, RFID technology, and the Internet. China launched the Made in China 2025 initiative in 2015, vowing to promote the deep integration of digital and smart manufacturing with information technologies such as IoT, cloud computing, AI, and smart manufacturing as the main path for future development required to upgrade China from a 2 Source: 5G + Smart City White Paper 3 Source: International Telecommunication Union (ITU) 4 Source: baike.baidu.com HCIA-5G Learning Guide workshop of the world to a world manufacturing power. At the end of 2018, China prioritized IoT as a new infrastructure, marking that IoT is moving toward the fourth phase as the infrastructure of the digital economy. The development of IoT will continue to be driven by the digital and intelligent transformation across industries and growing consumption demand, as well as internal drivers such as maturing technologies and ecosystem developments. 1.2.1.2 IoT Technology Architecture IoT was originated to provide connectivity and transmission functions. As its architecture matures, data processing becomes increasingly complex and burdensome, and this leaves IoT increasingly interlinked with edge computing, cloud-edge synergy, and other technologies. As its development continues, the industry introduces a logical architecture that divides an IoT network into three parts: cloud, networks, and devices, with the cloud processing data, networks performing transmission, and devices functioning to connect things and people and provide data presentation and interaction. Based on this logical architecture, an IoT network is divided into four layers. Layer Function Application layer It provides data presentation and customer interaction. Platform layer It is generally a cloud technology platform that provides device communication management, data storage, and service planning. Network layer It is also called the transport layer, and its function is to provide terminal access and transmit data. Sensing layer It consists of sensors and video surveillance devices, and its functions include data collection and signal processing. The device side belongs to the sensing layer, where sensors collect data and are connected to the access and transport networks, such as the 2G, 3G, 4G, NB-IoT, and 5G networks, over edge IoT gateways. Data is transmitted to the cloud to form a big data cloud platform, and the platform uses the data to HCIA-5G Learning Guide create benefits to industry applications. On the network side, 5G has more advantages compared with other networks in terms of high bandwidth, high rate, low latency, solid reliability, and massive connectivity. Therefore, 5G can greatly improve user experience. 1.2.1.3 Technologies Powering IoT Networks IoT networks use both wired and wireless communication technologies. This chapter will focus on wireless IoT communication technologies, which can be divided into long-distance and short-range technologies. The short-range wireless technologies include Bluetooth, Wi-Fi, ZigBee, and Z-Wave. 1. Bluetooth is a short-range wireless digital communication standard that features a large capacity. It supports a maximum data rate of 1 Mbps over a maximum distance of 10 cm to 10 m. With a higher transmit power, the transmission distance can reach 100 m. It features a high speed, high security, and low power consumption. Supporting only limited nodes, it is not suitable for multi-point deployment. 2. Wi-Fi allows electronic devices to connect to a wireless local area network (WLAN) on the 2.4 GHz UHF or 5 GHz SHF ISM band. It features a wide coverage and high data transmission speed, but cannot guarantee adequate security and stability performance or maintain a low power consumption. 3. ZigBee is a short-range wireless technology that features a low power consumption and data speed. It boasts a low complexity and supports self-organization, and is widely used in industry and smart homes. 4. Z-Wave is an emerging RF-based short-range wireless technology that is cost-effective and highly reliable while consuming a low power. It is advantageous in its simple architecture and is suitable for low-rate application scenarios. The long-distance wireless technologies include Sigfox, LoRa, NB-IoT, and eMTC. 1. Sigfox uses the Ultra Narrow Band (UNB) technology to maintain stable data connectivity at a low power consumption. It supports a maximum distance of 1,000 km and a capacity of up to 1 million IoT devices per base station. 2. LoRa, short for Long Range, is maintained and managed by the LoRa Alliance. It supports two-way data communications over a long distance based on the physical layer, and features a high capacity and long battery life. LoRa is best suited for automatic metering, smart home, building automation, wireless warning and security protection, industrial monitoring and control, and remote irrigation. 3. NB-IoT is a cellular narrowband IoT. Built on cellular networks, it requires a cell bandwidth of only around 180 kHz and can be deployed on top of legacy GSM, UMTS, and LTE networks, which is favorable to reduce costs and ensure smooth upgrades. NB-IoT is an emerging technology that focuses on global use cases requiring low power consumption and wide coverage. It is built for low-speed services and features wide coverage, huge connectivity, cost effectiveness, low power consumption, and excellent architecture. NB-IoT has been incorporated into 5G standards. HCIA-5G Learning Guide 4. eMTC is a wireless IoT solution proposed by Ericsson. Based on LTE, it designs the soft features of wireless IoT networks. It is mainly used in low-rate IoT use cases where in-depth coverage and low power consumption with massive connectivity are required. With NB-IoT incorporated into 5G standards, let's take a further look at the four features of NB-IoT. ● Low costs Huawei SingleRAN solution facilitates the upgrade and reconstruction of legacy devices, helping cut construction and maintenance costs. NB-IoT chips are specifically designed for IoT narrowband and low-speed demand, supporting only single- antenna transmission, half duplex mode, and simplified signaling. As a result, NB-IoT chips cost only a few dollars. ● Low power consumption NB-IoT uses the power saving mode (PSM) and extended discontinuous reception (eDRX) for IoT services where small packets are occasionally transmitted. With these features, IoT devices enter the dormant state immediately after sending data packets and wake up only when data transmission is required again. As a result, IoT devices can be kept dormant for up to 99% of their service time, achieving ultra-low power consumption. The eDRX behavior in idle mode can be customized based on 3GPP to extend the paging cycle from 2.56s to a maximum of 2.92 hours. This reduces the number of times UEs in idle mode periodically listen to paging channels, enabling UEs tostay in the low-power deep sleep state over a long time to reduce power consumption. ● Wide coverage NB-IoT is specially purposed for IoT, especially for Low Power Wide Area (LPWA) applications. It uses retransmission over the air interface and ultra-narrow bandwidths to provide gains of over 20 dB over GSM. This means that a wider coverage can be possible even with fewer sites while ensuring strong signal penetration (down to basements). Devices such as electricity and water meters in hard-to-reach areas can be covered, and pet tracking and other services that require broad coverage can be provided. ● Massive connectivity NB-IoT devices are cost effective and are widely deployed across industries, especially in industries where various instruments are HCIA-5G Learning Guide necessary. NB-IoT provides 50 to 100 more times connections per base station compared with other wireless technologies. This means that one sector can host 100,000 connections at most. By comparing different wireless IoT access technologies, NB-IoT has noticeable advantages over proprietary short-range technologies, with support for low delay sensitivity, ultra-low device costs, low power consumption, and optimized network architecture. 1.2.1.4 5G+IoT Based on market statistics by IDC, the global IoT connections had approximated 30 billion by 2020, with the IoT market size expected to grow by 16.9% per year to reach USD1.7 trillion by 2020. The breakthrough of 5G provides a new opportunity to the IoT industry. Compared with 4G, 5G has more powerful communication and bandwidth capabilities, meeting the requirements of IoT use cases for high speed, stability, and wide coverage. With 5G, many IoT applications that are still in the theoretical or experimental stage may see brand-new opportunities to be quickly implemented and exploited. With all things connected, massive machine-type, and mission-critical communications will impose higher requirements on network speeds, stability, and latency. People will have stronger demands for heavy-traffic applications and connectivity of things over the mobile Internet. New applications, including autonomous driving, AR, VR, and tactile Internet, urgently need 5G. 5G helps clear away the hurdles to the transmission speed and massive connectivity of IoT. mMTC, as a 5G use case, will support one million connections per square kilometer, achieving connectivity of everything. As such, 5G IoT will enable a massive number of devices to access networks, supporting smart cities, smart metering, and smart parking among many other applications. 5G supports 1 ms of end-to-end latency required for remote control in autonomous driving and industrial production. With 3G for remote control, the braking distance is 3.3 m, given that a car travels at a speed of 120 km/h. With 4G, the braking distance is 1.67 m, which is still not short enough to ensure safety. By contrast, 5G reduces the braking distance to 0.033 m, markedly improving safety. HCIA-5G Learning Guide This means that 5G will bring enormous business opportunities to IoT applications. 1.2.2 Cloud Computing 1.2.2.1 What Is Cloud Computing? Cloud computing applications are everywhere. Cloud albums, cloud videos, and cloud music are all based on cloud. Cloud computing as a service is a business model where network, computing, and storage resources are purchased from cloud servers based on customer needs. The resources can be quickly provisioned and freed up with minimized management workload and interaction with the service providers. According to the National Institute of Standards and Technology (NIST), cloud computing is defined as a model that supports convenient, on- demand access to a shared pool of configurable computing resources (like networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. By its definition, cloud computing has the following key features: 1. On-demand self-service: Computing, storage, and network resources are purchased as required for services. 2. Ubiquitous network access: Cloud services can be accessed through wired or wireless networks at any time. 3. Location-irrelevant resource pooling: Computing resources of service providers are centralized for customers to rent. Both physical and virtual resources can be dynamically allocated to customers as required without having their exact locations controlled by or known to the customers. 4. Rapid elasticity: Computing, storage, and network resources can be quickly deployed and elastically scaled up or down based on service requirements. 5. Pay per use: Charging is based on the usage or usage duration (normally by month or year). HCIA-5G Learning Guide Cloud computing consists of three layers: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). The IaaS layer provides basic computing, storage, and network services, with typical IaaS services including Elastic Cloud Server (ECS) and cloud storage. The PaaS layer provides an environment for running and developing applications, in addition to the components for R&D, with database services being a typical PaaS service. The SaaS layer provides software-related functions through web pages, and typical SaaS services include portal websites and enterprise office application (OA). In the context of cloud computing, it is worth mentioning virtualization — a technology considered as the foundation of cloud computing. With virtualization, multiple virtual machines (VMs) run on a physical server, sharing the physical server's CPU, memory, and I/O resources while being logically independent of each other. In computer science, virtualization refers to the abstraction of physical resources of computers to provide one or more operating environments. Therefore, virtualization implements simulation, isolation, and sharing of resources. Prior to virtualization, servers are independent resource pools, with the operating systems strongly coupled with the hardware resources. After virtualization, the hardware resources are abstracted into shared pools and decoupled from the operating systems, with the pooled resources flexibly allocated to applications. HCIA-5G Learning Guide Virtualization is a process with which a lower-layer software module abstracts a virtual software or hardware interface for an upper-layer software module by providing interfaces that are completely consistent with the exact operating environments expected by the upper-layer software module. In this way, the upper-layer software module can directly run in the virtual environment. Virtualization abstracts a resource into one or more parts by means of space and time division and simulation as well. Common virtualization includes memory virtualization (page file), disk virtualization (RAID and volume), and network virtualization (VLAN). Virtualization has noticeable advantages. ● Partitioning: Large, scalable hardware resources are partitioned into multiple independent servers, enabling multiple operating systems and applications to run on a single physical system in parallel and computing resources to be pooled and effectively managed. ● Isolation: Virtualization provides idealized physical machines, with each isolated from the other to prevent data from leaking, ensuring that applications communicate only over configured connections. ● Encapsulation: All the environments of a virtual unit are stored in a separate file and are presented to applications as standardized virtual hardware to ensure compatibility, and each disk partition is stored as a file to facilitate backup, transfer, and copy operations. ● Independence: Virtual machines can be migrated to other servers without any modification. While ensuring high availabilityand dynamic adjustment of resources, virtualization greatly improves system sustainability. 1.2.2.2 5G+Cloud Computing Cloud computing ensures flexible, on-demand, and ubiquitous resource utilization for applications. 5G brings new opportunities for cloud computing development. Cloud services will be fully upgraded. Though 4G has brought cloud computing to enterprise users on a large scale, the access to cloud services is still limited for individual users. This will be changed with 5G. 5G will improve cloud computing and cloud services, enabling them to have a direct impact on daily lives. For example, by being deeply integrated with 5G, smart services, including IoT, IoV, smart city, industrial Internet, and smart healthcare, will be greatly improved, enabling people from all over the world to embrace an era of smart life. 5G will promote a comprehensive upgrade of cloud vendors. With 5G to rapidly improve networks, cloud service providers will be provided with better opportunities to upgrade and reconstruct cloud infrastructure, architecture, service models, and business systems, so as to accelerate the adoption of cloud solutions across vertical industries as they look to keep pace with the development of cloud computing. 5G will shift cloud computing from network centers to network edges. As networks improve, more and more devices will be networked and users need to exchange more and more data. Persistent data exchange with data HCIA-5G Learning Guide centers will put 5G application experience at a considerable risk. With edge computing, users can exchange data with edge data centers, and this will further reduce latency to enable service responsiveness. In addition, edge computing will accelerate the integration of industry ecosystems, explore new services, and develop cloud service models for verticals. At Huawei, we believe that applications in the 5G era will be mostly based on the synergy of mobile networks, devices, and clouds, and we call this Cloud X. 5G brings new eMBB networks and also brings edge computing closer to users, hopefully to reshape the entire service chain. Ubiquitous 5G connectivity and edge cloud access will help move computing, storage, and rendering from clients to the cloud, driving clients to become "thinner", more cost effective, and more mobile while making it easier for the industry to deploy and promote services. Moreover, with services centralized on cloud, networks, edge computing, and network slicing capabilities will become more indispensable to cloud sustainability. This further highlights the importance of networks, further enhancing the leading role of operators in the ecosystem. According to Huawei's Wireless X Labs, cloud VR that features rendering on the cloud will be a new trend of VR. Unlike in local VR mode where terminals must be cabled to local servers — a major cause for poor experience and high cost, terminals in cloud VR mode are wireless and rendering is completed on cloud. As such, terminal costs can be reduced and user experience can be improved. Cloud VR requires higher mobility, larger bandwidth, and lower latency. For example, entry-level VR needs a bandwidth of 100 Mbps and a latency of 10 ms, while to ensure ultimate VR experience, the bandwidth will be increased to 9.4 Gbps but the latency reduced to 2 ms. Only 5G networks are able to meet the requirements of ultimate VR experience. 5G+Cloud VR is only one application, and more will be explored in the future. 1.2.3 Big Data 1.2.3.1 What Is Big Data? To date, there is no universally agreed definition of big data. The mainstream definition interprets big data from the following four characteristics: HCIA-5G Learning Guide ● Variety: This reflects both diversified data sources and various structures, with the former reflecting that data can be collected from different channels and platforms and the latter showing that data can be structured and non-structured. ● Volume: This reflects the massive amount of data generated on the Internet. As the Internet progresses with each passing day, the volume of data increases continuously. The data generated now in one year equals the total of the data generated in the past. ● Velocity: This involves the entire process of big data, such as the growth rate and processing speed of data. For many types of data, real-time feedback is already possible, enabling the data to have an impact on our life as soon as it is collected. ● Value: This expresses the low value density of big data — with the tiny amount of useful data being completely overwhelmed by the massive amount of useless data, thus posing a serious technological challenge for exploring the value of big data. In other words, a larger amount of big data does not necessarily ensure a better effect. The key is to perform in-depth analysis of the massive amount of useless and complex data to mine data that is of value. These are the basic features of big data. What is the size of big data? 2.9 million e-mails are sent worldwide in one second, which would take one person 5.5 years to finish reading them day and night, assuming that one email consumes one minute. 28,800 hours of videos are uploaded to YouTube every day, which would take one person 3.3 years to watch them day in and out. On the Internet, a large amount of data is generated every day. So, what is the use of such a large amount of data? Let's look at big data technologies first. Big data technologies are an umbrella name for technologies involving the collection, storage, analysis, and application of big data, as well as those related to dealing with the massive amount of structured, semi-structured, and non-structured data through various tools to produce analysis and prediction results. For example, GE uses a large amount of aircraft engine running data for analysis to predict when the engine will be likely to encounter faults. In the financial industry, Citibank uses IBM Watson to recommend products to wealth management customers, and Bank of America uses customer clicking data to recommend featured services. HCIA-5G Learning Guide 1.2.3.2 5G+Big Data So how is 5G related to big data? 5G enables the scale and diversity of data to grow continuously. Providing high bandwidth and wide connectivity, 5G will create a tremendous amount of data. With both people and things in cities connected to cloud servers through 5G, big data can be generated and utilized to help governments better make decisions. In factories, people, machines, materials, processes, and environments will also be connected to cloud servers over 5G to create industrial big data. 5G facilitates the use of big data for intelligent decision-making and stimulates IoT expansion, which in turn fuels the progress of big data. Big data is analyzed and processed through dedicated technologies to facilitate decisions that are aimed at improving efficiency. In smart transportation, data generated by people-to- vehicle, vehicle-to-road, people-to-people, and vehicle-to-vehicle connections can be sent to the cloud through 5G for further calculation. This will help optimize driving routes to lessen traffic congestion and improve overall efficiency. 1.2.4 Artificial Intelligence 1.2.4.1 What Is Artificial Intelligence? Artificial intelligence (AI) is a hot technology topic. First proposed by John McCarthy in 1956, with the meaning of allowing machines to behave like human beings, AI is defined as the science and engineering of making intelligent machines. It aims to enable machines to work intelligently, similar to the way that the human mind works. Currently, AI has become an interdisciplinary that overlaps with various fields, including cognitive science, psychology, and linguistics. The industry has not reached consensus on the definition of AI. Intelligent machines are generally classified as four categories:"think like a human", falling into the field of weak AI, with examples including Watson and AlphaGo; "act like a human", falling into the field of weak AI, with examples including humanoid robots, iRobot, and Atlas (by Boston Dynamics); "think rationally", belonging to the field of strong AI, which is still not yet available due to the bottleneck in brain science; and "act rationally", which also falls into the field of strong AI. When it comes to AI, one can never ignore machine learning and deep learning. AI is a new science that studies and develops the theories, methods, techniques, and application systems to simulate and extend human intelligence. Machine learning studies how computers acquire new knowledge or skills by simulating or performing the learning behavior of human beings, and how they reorganize the existing knowledge structure to improve its performance. It is one of the core research fields of AI. Derived from the research of artificial neural networks, deep learning is a new field in machine learning that simulates human beings to interpret various data, such as images, sounds, and texts. For example, multilayer perception is a type of deep learning structure. HCIA-5G Learning Guide Deep learning is a specific branch of machine learning. To understand deep learning, it is necessary to fully understand the basic principles of machine learning. Task T: How a machine learning system processes examples. A sample is a collection of quantized features that are collected from objects or events processed by the machine learning system, such as classification, regression, and machine translation. Performance measure P: How the abilities of a machine learning algorithm, such as accuracy and error rate, are evaluated. Experience E: While most of machine learning algorithms can be perceived as for gaining experience on an entire data set, some are not trained on a fixed data set. Reinforcement learning algorithms that need interacting with an environment are typical examples. In such cases, feedback loops will be created between their learning system and training process. Depending on the learning process, machine learning algorithms can be categorized as unsupervised or supervised. The overall process of machine learning starts from data collection. There is a famous saying in the industry: "Data determines the upper limit of machine learning, and models and algorithms are just used to approach this upper limit." Therefore, data is critical for the entire machine learning project as AI modeling requires a large amount of data cleansing. Data loss, uneven distribution, exception, and irrelevant impurities occur more or less in data sets. This requires the collected data to be cleansed through processing of missing and deviated values, data normalization, and data conversion among other methods. Data cleansing aims to ensure data normalized for subsequent feature extraction — a process of extracting features of data sets and reducing data dimensions. After data processing, a proper machine learning model is selected for data training. During model selection, different models are used to train the data and the output results are compared to choose the best model for evaluation and testing. After the best model is selected from a model class, model evaluation is performed to determine whether the model is over-fitting or under-fitting. If HCIA-5G Learning Guide the data fitting is not proper, parameters are adjusted to optimize model deployment and integration. Then, the trained machine learning model is deployed to the production environment. Deep learning is a learning model based on unsupervised feature learning and feature hierarchy. It has great advantages in speech recognition, natural language processing, and computer vision. Currently, AI is heavily applied in the following technical fields: 1. Computer vision: It studies how to make computers "see" objects. Its applications include target detection, image segmentation, target tracking, text recognition, and facial recognition. 2. Speech processing: It is a general term for speech processing technologies, including vocalization, statistical features of speech signals, speech recognition, machine synthesis, and speech perception. Its applications include smart speakers, spoken language assessment, voiceprint recognition, and consultation robots. 3. Natural language processing: Its research topics include machine translation, text mining, emotion analysis, and public opinion analysis. 1.2.4.2 5G+AI AI is undergoing a third wave of development triggered by deep learning, with remarkable progress achieved in data, computing power, algorithms, and platforms. 5G and AI are growing into strategic technologies driving new technological and industrial revolution, emerging as a high priority of new infrastructure. The two emerging technologies enable and benefit each other, accelerating the digital transformation together in both economic and social areas. Rapidly developing 5G networks and maturing synergy of 5G with cloud, edge, and devices will help achieve full connectivity and data convergence and reduce barriers to AI applications while boosting AI integration into social and economic development. According to the forecast of an authoritative organization, the AI market will be worth more than USD6 trillion by 2025, confirming that AI will become ubiquitous. Turning into a core application on 5G networks, AI will accelerate the intelligent transformation of 5G networks as well as cloud, edge, devices, and other HCIA-5G Learning Guide infrastructure, maximizing the comprehensive potential of cloud and networks. Ultimately, AI will make 5G become even more intelligent5. 5G will be a key infrastructure for various industries to achieve digital transformation. Featuring high bandwidth, massive connectivity, and low latency, 5G will facilitate AI development in terms of data, computing power, and applications. 5G's massive connectivity facilitates data collection. According to the IMT-2020 White Paper on 5G Vision and Requirements, more than 100 billion devices will be connected to mobile networks worldwide by 2030. 5G's full connectivity will lead to an explosive growth in data volume, types, and forms, providing high-quality data sources for both AI training and modeling. 5G's high bandwidth will also ensure the smooth data transmission required to maximize the potential of AI in data analysis and mining, providing better support for upper-layer applications. Conceivably, the convergence of 5G and AI will trigger a chain of transformation to accelerate full connectivity, sensing, and intelligence, creating a far-reaching impact on the digital transformation socially and economically. 5G AR glasses facilitate AI facial recognition to improve security efficiency. AR glasses will enable security staff to upload videos through 5G networks to the background database for personnel matching. This will help check whether a person is suspicious, helping security staff determine the actions that need to be taken correspondingly. 5G provides huge bandwidth, ensuring that data is sent back to the cloud in real time for AI analysis. 1.3 5G+New Technologies Empower Vertical Applications At the 2019 HUAWEI CLOUD Summit, Edward Deng, President of HUAWEI CLOUD Global Marketing & Sales, commented on the huge effect of the convergence of new technologies. "The convergence of cloud, AI, 5G, and IoT will provoke a chain of positive effects on everything, from lives to work and society at large, featuring all-new applications and experience and creating new industries. This will enable industries to improve under-performing elements and deliver what was once impossible and unimaginable, creating revolutionary new values for society." 5G, cloud, AI, and IoT are already changing society. Thiswill be a multi-phase process. Considering the advantages of 5G in bandwidth, connectivity, and latency, the joint applications of 5G and other new technologies in vertical industries are divided into three phases. 5 Excerpt from the speech by Dong Xin, the general manager of China Mobile, at the WAIC Cloud Summit 2020 HCIA-5G Learning Guide In phase one, video services are focused. At the early stage of 5G development, NSA networking dominates to provide adequate support for only eMBB services, such as HD broadcasting, UAV HD video upload, and video surveillance. In phase two, 5G networks are more mature to support certain low-latency applications, such as remote crane control in ports and smart unmanned mining operations to improve efficiency. In phase three, 5G networks are matured, supporting a minimal latency of 1 ms and a speed of up to 10 Gbps. With this level of performance, remote surgery, autonomous driving, and accurate remote control will be possible. A massive number of devices will be connected to networks, helping make cities more intelligent. 5G, cloud, AI, and IoT are the basic elements of future infrastructure. The convergence of 5G and other new technologies is already changing society, providing the basis for the digital economy.