The main trends and concerns of the Hannover Messe 2019

April 11, 2019, ABI Research, published the article “Industrial Revolution: the main trends and concerns in 2019 Hanover Fair”, the current global industry, supply chain and energy environment is facing major changes, and trade frictions, political and a shift in the global market mechanism and enable enterprises to develop much pressure, so the Hannover Messe 2019 became the turning point in the industry’s digital transformation.
Article translations industrial applications 5G from 2018 Hannover Messe 2019 Hannover Messe, at least among technology providers, Wi-Fi vocabulary become a hot topic from a nuisance. Siemens (Siemens) at Monday’s press conference spent a lot of time discussing the role of 5G. Ericsson (Ericsson) launched a new industrial connectivity products and announced a partnership with ABB. Expo site is also a 5G Arena, the company participated in the presentation include Bosch force Dulux (Bosch Rexroth), Ericsson (Ericsson), Festo (Festo), Nokia (Nokia), Qualcomm (Qualcomm), Siemens (Siemens), etc. . In these companies, Ericsson demonstrated the use of industrial connection factory most forward-looking mobile phones of the process, but all of these vendors will continue to find scalable business case, which will drive the demand for a wide range of private and 5G LTE. 5G technology demonstration on the Hanover Fair is far from the typical characteristics of the field of telecommunications. In fact, almost all the exhibitors are discussing different use cases. 5G. Some examples include: 1, many companies are trying to transfer video to 5G factory floor as faster channels, or through 5G transmission Industrial Ethernet. These use cases using 5G eMBB version, which has been standardized and can be deployed. 2, several automated guided vehicle (AGV) manufacturers are currently using telemetry 4G, 5G remote operation but more interested. They claim 5G (3GPP URLLC, 16 version) deterministic network functions will allow them to remotely control their AGV. 3, a number of exhibitors 5G is also desirable to simplify the communication environment of the factory floor, as the data may require up to seven different technologies to transfer from the sensor to the cloud. These exhibitors also want to 5G network will replace uncertaintyProprietary fieldbus technology, because in theory, these techniques are no longer needed. All of these use cases common trend is the lack of commonality between them. In fact, most companies participate 5G Arena are interested 5G different functions and tested to meet their specific requirements. This is in stark contrast to the telecommunications sector, the cost efficiency and market inertia is through economies of scale and some large established use cases. On the one hand, mobile service providers (MSP) and telecommunications technology supply chain operation to “build it, that is, they come” model. They have been building networks, not knowing what will eventually run on service, mainly for the consumer market. On the other hand, the industrial sector needs tailor-made solutions, but these solutions do not necessarily make the MSP and their technology providers to create the necessary economies of scale have become accustomed. For example, some industrial customers may require a fixed connection for 5G camera, some may require outdoor campus 5G network for AGV, while others require mechanical deterministic network functions. Despite these limitations, Industrial Operations Technology (OT) vendors are adjusting Qualcomm 5G modem and Nokia’s network to solve their problems, rather than waiting telecommunications technology supply chain to finalize the standard, and then prepared to “industrial” 5G products. To some extent, the industrial company is now on the 5G innovation, long before the telecommunications market itself. Telecommunications industry market must be taken seriously immediately, and to manufacturer shall prevail. Otherwise, they will likely lose one of the most promising end markets. Unfortunately, mobile network operators (MNO) and the majority of telecommunications solutions provider, and industry and factory owners lack of consistency. In a panel discussion moderated by ABI Research in Hannover Industrial Fair, from Tata Communications (Tata Communications) and representatives of Vodafone (Vodafone) of say, although they narrowband Internet of Things (NB-IoT), and private LTE 5G are interested, However, there is no necessary relationship between the ecosystem to take advantage of this opportunity. If this continues, and the MNO to maintain ownership of the spectrum, MNO will maximize its impact on the spectrum provider minimized. Additive for industrial applications in the development of manufacturing industry 4.0 strategy must consider the availability of additive manufacturing (AM) AM and production platforms. By 2030, annual shipmentsThe number of additive manufacturing production will increase more than tenfold platform (hardware and associated systems revenues of more than US $ 325 billion). These systems will annually produce more than $ 360 billion worth of parts and final products (higher than today’s $ 6.8 billion), nearly $ 2 trillion during the next decade to end. As we have seen IMTS 2018, with advances in technology, production systems, particularly those dealing with metal (rather than polymer) technological advances, this growth is expected to increase significantly. For these reasons, a significant number of the Hannover Fair absent somewhat surprising: for example, Desktop Metal, EOS, ExOne, GE Additive and Renishaw. On the one hand, it shows the maturity of the market; on the other hand, shows that when the product is on the market, show the reality of heavy machinery and transport R & D and production. In this regard, HP hides an earlier version of Metal Jet machine at a critical point: the polymer. It also confirmed its metal production system beta version will be in circulation by the end of 2020, and to achieve a more widespread availability in 2021. This is the Desktop Metal, ExOne, even GE Additive companies provide a lot of space, you can pre-launch comparable (if not quality) products. Three Systems, Inc. (3D Systems) and Manchester Tacitus (Stratasys) have nothing to say. Although the two companies can be understood as leading to new entrants Markforged and Formlabs (announced at its upcoming meeting on Form 3 and Form 3L SLA system), but in terms of infrastructure and support, it is still mainly dependent on its traditional customer installed base . This is evident in their company sent regional team. For manufacturing organization, AM refers to the different ways of production, reduce waste and administrative costs; for designers and engineers, without the traditional limitations of manufacturability, performance can rethink freely; the supply chain For shortening the lead time, reducing the moving parts. No matter what position you are in the production chain, AM and can ultimately affect your business. Industrial applications of artificial intelligence traditional industrial enterprises to develop artificial intelligence products and services that previously dominated the field of AI technology companies poses a severe challenge.Germany Harting (HARTING), Weidemueller, Germany ZF (ZF Group), Germany Rotary pumps (SEW-EURODRIVE) and Konica Minolta (Konica Minolta) and other companies, have already appeared in the industrial market AI platform. The company’s core product line of industrial space-based; they only focus on industrial manufacturing companies ready to implement architectural solutions. Therefore, they show that the transition to AI, the AI ​​technology for industrial enterprises showed considerable interest. Weidemueller shows an industry analysis platform that use machine learning to support industrial automation. HARTING, a major supplier of industrial cables, IoT launched a gateway called MICA, which provides edge connectivity and machine learning reasoning. ZF Group is working with Nvidia (Nvidia) to develop a computer named ZF ProAI edge platform for vehicle automation. Germany is the world’s first rotary pump in Baden – one of the co-use of robotic systems Württemberg factory company. Konica Minolta introduced an AI platform for image industrial automation, predictive maintenance and quality control, voice, and data analysis. AI scalability problems exist in the industrial market. CraftWorks is a build customized solutions for AI software companies to industrial customers, we found that compared with the AI ​​industry, scalable solutions and applications difficult to achieve. AI solution is usually deployed as a custom implementation, and customized for specific applications and customers. General model developed to switch between different clients challenging. Customers often also part of the problem, because they do not want their data to be used by competitors or product contribution. Therefore, the company is focused on developing AI platform engine; this way, industrial customers can build their own model, rather than relying on specific AI solution. ABB demonstrated impressive robots and AI systems to automate the movement for the crane. ABB has developed a virtual environment can be deployed digital twin. Based on reinforcement learning software can also be deployed in the same digital twin virtual environment, then it can be trained to control the digital twin. Yumi collaboration platform that demonstrates the use of robots ABB to control the virtual EOT (electronic overhead traveling) cranes. Yumi control of reinforcement learning softwareThe translation movement of the operator to ensure that the crane cargo remains controlled when moving. ABB takes eight years to develop virtual environment software library and toolset corresponding reinforcement learning, and has great potential for incredible control in automation and machine automation. ABB has not yet publicly launched this software to customers, but said the technology has been deployed in some crane system. Augmented Reality Augmented Reality in industrial applications since its inception has been at a disadvantage. DAQRI, Google CONTROL ENGINEERING China Copyright , Microsoft, ODG and Vuzix other companies, in terms of hardware knows this, because this has been the main focus of innovation in the market (demand) is. All these companies, except DAQRI and Microsoft, which did not specifically Azure and HoloLens attend the meeting. However, the market continued to talk about more and more technical use cases. Here, the mismatch is the focus: Yes Control Engineering Copyright , with more and more cases of AR can be used, but suppliers have a responsibility. On the Hannover Fair Control Engineering Copyright , to do so the two companies are RealWear and Upskill.RealWear (hardware) demonstrates a unique after-certified products can be used Hazloc environments, such as oil and natural gas; Upskill (software) stressed the GTM (listed) client to focus on fast-growing and can be extended by proper evidence point. Industrial, commercial collaboration and there is a large AGV robots at Hannover Messe, the ratio between the AGV and independent material handling (AMR) suppliers about 60/40. However, despite the deployment of thousands of AGV company report, AMR is ten and twenty. The current price is limited AMR platform for US $ 40,000, but only for the underlying platform. There are many mobile operation and demonstration of companies, including Bosch, Sesto, Siasun and so on. But when probed, there is little evidence that this has been integrated into the actual workspace. Moving operation is still out of reach, because just beginning to transition from AMR’s AGV. For some of the key players of the IoT and industrial automation companies, inPrior to moving beyond the mobile robot operations and material handling become more mainstream, the debate between wired and wireless plant has matured. Most vendors still want their robot arm is wired, any move operation is likely to be an adjunct to the current set of stationary industrial robots. Universal collaboration by the robot continues to dominate, it has been transformed from a supplier as a platform vendor, end-effectors and software vendors can focus on platform (ie Universal +) cross and deploy their products. Collaboration space competitors are trying to differentiate themselves, when asked, they use a series of points to illustrate their differences: ● easy to use ● ● seventh axis for the SME (small and medium enterprises) market price ● since the low year, end-users can access all of these features, it does not diminish the company’s global leadership position. The company has sold 31,000 units of the robot, the market share of 50% -60%. For collaborative robots to achieve significant growth beyond the forecast, the need to re-evaluate the hardware. Arms industry needs to become more collaborative or cooperative robot needs, and force sensing payload terms with excellent hardware performance through superior speed control or tactile sensing. Without these innovations, the concept of collaborative robots will be limited to a few key machine management applications, assembly, pick and place and so on. In the past year, the exoskeleton to get some important driving force, there are four main suppliers in Hannover Messe: German Bionic, Skelex, Ottobock and Noonee. Germany is building a new Bionic IoT platform, which combines a number of competitive suppliers of smart wearable devices deployed in the industrial field. The industry is still in its infancy, and there are common interests and collaboration robot, by the total addressable market (TAM), will become a greater chance. Robotics and industrial suppliers to continue to build strategic relationships with telecom operators to bring advanced wireless capabilities for production workshop. The most important example is the partnership of ABB and Ericsson. 5G Arena display space mission critical mobile operations in its presentation, in collaboration with Qualcomm and other companies 5G will be built into the system on their robots dedicated on-chip (SoC) hardware. But in addition to the demonstration, deployment show no significant 5G willThe next two to three years to become a key driver of robotics. A large number of industrial IoT IoT / ICT operators have been developed with established industrial processes and provide a wide range of services and has specialized departments and senior managers, such as AWS Control Engineering Copyright , Telenor, Microsoft and Cisco. The industrial sector is maturing now often mentioned in the top three suppliers located in vertical industries, while a few years ago only a secondary focus. Professional providers are also developing special industrial technology suite. For example, Kaspersky showed industrial environment optimized for network security suite. Although there are many IoT / ICT (information and communications technology) suppliers in Hannover Messe proved that sustained integration between digital and physical aspects of industrial solutions, but further work is needed to better coordinate these two areas : layout exhibition space so IoT exhibitors and traditional industrial machinery suppliers completely separate, and present in the air compressor which is independent of the exhibition hall, the clamping system, the machine tool, the fluid handler, robots and other equipment. Although this part of the physical separation has symbolic significance, it does suggest two areas of mutual non-interference in each other rather than cooperate. Some companies are still talking about it IoT solutions in terms of transverse platform enabler, rather than specific use cases and practical embodiment, the challenges faced by industrial enterprises left their partner, rather than by trying to find difficulties and problems away solve them. IoT / ICT companies are listed digital technology, from twin to 5G and digital IoT platform, AR / VR (virtual reality and enhanced), network security, modeling, and for additive manufacturing, AI, and many other virtual prototyping design. This has caused considerable confusion and dispersion of a combination of techniques and methods. This diverse collection of how technology and distributed together, what practical problems can be resolved or what the benefits (cost savings, improve competitiveness, quality assurance, etc.), and not reflected in the marketing out in detail in the speech provided. This is in sharp contrast with the industrial sector, looking for simple, basic, scalable, interoperable, standardized and manageable solutions to solve the problems they face today. Also reflects the dichotomy between the prior art forward-looking techniques (e.g., 2G / 3G and 5G and LPWA: low power WAN). Despite FIWARE , but standardization of the urgent needs have not been fully resolved, many suppliers still use complex protocol conversion software solutions. Intelligent Supply Chain Although the Hannover Messe 2019 show industrial IOT ecosystem infrastructure vendors mature, technology vendors and systems integrators have changed the dialogue on the broader supply chain. Now, manufacturers focus more on high-level transformation plan, not just on the factory floor data extraction utility. Deutsche Bahn Systel and Bosch Rexroth the company supplies digital twin chain had a very real conversation. In the supply chain, the whole supply chain using cloud-based virtual replica of the modeling and optimization of assets and connection process, now extended beyond the factory. Hannover Industrial Fair also showed that due to the cooperation between industry Things (IIoT) development, supply chain partners become easier, but also more and more attractive. Real-time collaboration can share data companies can significantly improve the success rate of demand through the planning and operational efficiency. Hannover Messe also show that virtual digital twin enable partners to collaborate and share data between, this is the future trend of the industrial supply chain planning. It also shows how to keep true closed-loop supply chain, and how to use intelligent design and IoT to achieve this goal. The growing popularity of Internet products, combined with effective Internet of Things based manufacturing and other companies displayed by the PTC Product Lifecycle Management (PLM) platform, meaning that by providing predictability for consumers and end-user maintenance and additional digital products, We can create value throughout the product lifecycle. These features provide the opportunity to protect themselves against more agile startups and digital natives or cheaper overseas competitors interference manufacturers; these two threats will affect consumer and business markets. Intelligent speed manufacturing practices, such as generating design and 3D printing, apparently to fill the missing part of the puzzle loop. Excellent design capabilities from Autodesk, plus the impressive display at the expo deep additive manufacturing capabilities, means that point collected IoT product data can be fed back into the product design process, but also fundamentally changed the material from purchasing, production and distribution of spare parts and provide after-sales service. 2019 Hanover Industrial Fair also sent a clear message, flexibility and scalabilityIt malleability become increasingly important in manufacturing and logistics operations, which means that demand for warehousing and internal logistics is changing rapidly. At the fair, Universal Robots robots and other technology vendors have realized this and stressed the importance of ROI period down to one year, while recognizing the importance of collaboration automated. Conference shows that this is not the case of machine VS man, but man and machine – outside the Expo site as bones and industrial growth as evidenced by AR. Some fixed mechatronic automation vendors do not agree with this future prospects, talk about their five-year payback period, but failed to fully adapt to the throughput of large fluctuations in demand. Times the next day delivery and unlimited customer choice, never a given demand, and corresponding enhancement needs has never been greater. Warehouse automation supplier to prevent the operators to respond quickly to fluctuations in demand, in order to prevent disruption. Positioning technology from real-time location services (RTLS) point of view, the Hannover Messe show ultra-wideband (UWB) and Bluetooth low energy solutions to address the tremendous growth momentum, the number compared with last year, and hardware platform providers increased significantly . Attended the fair’s main suppliers and emerging start-up companies, including Ubisense, Kinexon, Ubudu, Tracktio, Thinkinside, Kontakt.io, BlueUp, Square Metrics and ZIGPOS and so on. However, it is becoming increasingly clear that the solution providers need to collaborate across the value chain and provide effective partnerships in order to provide a more intelligent location-based services for industrial environments. Today, many operators are adopting strict vertical method – covering everything from the hardware to the platform and the analysis layer. However, this method is not always scalable, and is generally limited to a single technology, it is difficult to apply to all use cases. On the contrary, more and more obvious that the platform providers need to effectively connect with a variety of asset tracking and production monitoring technical cooperation and support to provide a more comprehensive and valuable integrated solutions that improve ROI. Perhaps the most effective presentation at the fair in the form of Ubisense Smart-Space software platform appear. This platform technology-independent, and can be integrated over a plurality of sources of different positions in small to large industrial embodiment and identification information. The company showed a bit with BluetoothSet an important partnership with suppliers Quuppa, the visible light communication (VLC) supplier Signify and machine vision providers of advanced real-time tracking (ART), in addition to its own UWB solution that can provide effective factory floor components and devices tracking to ensure complete check in the correct area by VLC, and track the use of certain production processes the correct vision-based tracking. The idea is to choose the best hardware solutions, integrate them into a single platform and be able to monitor any inconsistencies or errors in the production process, to identify problems and prevent problems from occurring. This more efficient horizontal integration can provide unique insights to achieve scalable RTLS deployment, and provide a higher return on investment. In addition, RTLS vendors are increasingly realized that they need to move from the accuracy of information transfer and technical feasibility of providing reliable use cases, business models and generate significant ROI. More effectively integrate hardware vendors, different techniques and use cases that can help you build a manufacturing environment more intelligent than ever before. Industrial applications LPWA, NB-IOT SIGFOX LORA and IoT connection from the perspective of view, 5G at the 2019 Hannover Fair occupies a central position. However, it is generally considered to have limited effect 5G in the manufacturing sector, the existing connection technology to solve more than 90% of IIoT use cases. In 2019, corporate customers early assessment technology in the market have a significant degree of maturity; they are more active now and have things end solutions vendors, and can begin to implement these solutions today. LPWA based network technology has been the state of monitoring and asset tracking solutions, using a simple, low-cost sensor device modifications. For example, Ericsson demonstrated pilot its smart plant embodiment, the narrow band of things (NB-IoT) connected 1,000 retrofit sensor device to monitor plant equipment, and track located Ericsson’s Panda manufacturing plant in Nanjing, China restocking various assets . Supply chain optimization of asset tracking is IIoT the most direct results, by increasing the visibility of the production process, and will interfere with existing manufacturing operations to a minimum, in order to obtain immediate return on investment (ROI). Existing asset tracking solutions provider, currently based short-range wireless (SRW) ofSolutions (indoors plant asset tracking solutions is increasing LPWA) to expand its portfolio of solutions-based solution to provide seamless visibility inside and outside the factory. In the market LPWAN technology based on Sigfox and LoRa asset tracking solutions, leading to solutions based on NB-IoT and LTE-M’s. Intelligent Manufacturing industry software platform and intelligent manufacturing platform, some vendors continue to open more partners, while other vendors are deepening existing relationships in order to form a coalition by more standardized solutions. For example, Rockwell Automation (Rockwell Automation) has a stake in PTC, which has to extract data Kepware (Kepware), and with Microsoft to establish a deep partnership, to run on Azure. In the case of PTC’s extracted from the data processing and storage to the need to ensure that it is able to meet customer demand, rather than inflexible form relationships with other stakeholders and partners. On the other hand, Siemens announced the establishment of an open partnership with the Institute of SAS software (SAS Institute), for integration of flow analysis and MindSphere. Siemens also carried out similar work with the German Software Co., Ltd. (Software AG), and the use of MindSphere in Cumulocity IoT platform. Siemens is also working with Telit (Telit) and Litmus Automation conduct IIoT integration, and run AWS, Azure and Alibaba in the cloud. PTC and Siemens have started working applications bundled into solution more scalable in. Dassault Systemes (DassaultSystèmes) and ABB also presented the first joint solution as a new partnership. They will integrate ABB RobotStudio and DELMIA, including simulation within DELMIA ABB robots, so customers can better modeling and simulation robot how to run the production line before the physical installation. Partners also intends to use the data IoT platform to train their AI model to improve production planning and simulation software. The integration should provide direct value to joint customers planning new production lines, but both sides should keep an open attitude towards cooperation.DELMIA should include a detailed and specific simulation, ABB RobotStudio should be a combination of all suppliers of robots and other simulation software products for the manufacturing system. On a more strategic and transformational level, on the following areas provide only minimal information: how to transition from on factory automation to autonomy, how to develop the future of the factory, re-configuration is based on a modular concept and flexible factory production line , support services and manufacturing that is transformational shift to other business models, technology will be how to achieve this goal. Industrial space urgent need for a long-term vision about it forward and back, all the effort and investment can refer to. Something similar to the concept of unmanned car industry. At the micro level, which means that there are few suppliers to fully understand their role and current status and development direction. Hannover Industrial Fair to focus on close support and manufacturing industries, such as logistics, (sustainable) energy, smart cities, transportation and supply chain, also emphasized by the Industrial Supply Forum and other professional activities. Beyond the importance of manufacturing to provide some perspective in terms of optimization and transformation of the entire value chain. WI-FI, Bluetooth wireless connectivity and a wireless connection from the point of view, it is clear, 5G is winning the war industries Wi-Fi hearts and thoughts. From “5G Arena” to 5G robot, AGV, control unit and other connected mobile phone display manufacturing equipment, Nokia, Ericsson, Huawei, Qualcomm and other advances. On the Hannover Fair Control Engineering Copyright , 5G momentum is growing rapidly, and will undoubtedly continue. Although industrial grade Wi-Fi solution for many non-critical tasks, redundancy, enhanced security and other applications, but is now widely used, the role of Wi-Fi in the future manufacturing environment is likely to be more and more momentum 5G Innovation inundated. However, perhaps more worrying is that, at the time of the promotion (and defend) the role of Wi-Fi in an industrial environment, Wi-Fi solutions significantly behind the mobile phone industry, will only adversely affect the industry. From the perspective view of mobility, in the exposition, a number of presentations and demonstrations relating to 5G projecting the Wi-Fi limitations in mobile devices, the AGV e.g., Wi-Fi between different AP (Access Point) facing the switching challenge. Traditionally, Wi-Fi enabled devices will be originalLinks with Wi-Fi access point is disconnected, and establish a new link with the AP in the auxiliary device moves, which can lead to high packet loss rate and potential service disruptions. However, many industrial Wi-Fi solution providers have solved the reliability challenge. For example, Huawei at the fair shows Wi-Fi 6 solutions for industrial applications, it supports lossless roaming, and the client can quickly identify the best roaming to the AP to establish a new link, the original link is disconnected. When the mobile device (e.g., AGV) to switch between the AP coverage area, will not cause loss. Siemens also demonstrated its wireless LAN SCALANCE industrial products and industrial compositions Parallel Redundancy Protocol (IPRP), which allows parallel use of two radio links for mobile applications, including the AGV, trains, cranes and other mobile devices. In another demonstration, Huawei highlighted the new throughput of Wi-Fi 6 how we can bring faster download flash software on automobile manufacturing assembly line, thus speeding up the production process. Clearly, Wi-Fi has a large share in the industrial field, and will continue to be used in a number of areas. However, it should be highly concerned about the message is a hint Wi-Fi can not move message attack in any form. People view is available at the fair, 5G wireless technology of choice for almost all industrial applications. Although 5G will undoubtedly bring many enhancements to the robots, automation, mobility, and other mission-critical applications, many delay is not strictly required for industrial applications, and services may be provided via the existing Wi-Fi and other wireless standards. Connections, like mobile phones, Wi-Fi is also growing. However, in addition to Huawei, the traditional solutions, the impact of Wi-Fi 6 industrial netlist is almost unlikely. We did not discuss the upcoming 6GHz bands and Wi-Fi standards, such as very high throughput (EHT), and may be lower in a crowded 2.4GHz band 5GHz Wi-Fi in the delay, increase throughput and reduce interference and congestion, as well as impact on the wireless industry. In a related note, there is no activity on sub-1GHz Wi-Fi HaLow (802.11ah), which is very suitable for a scalable IP-based sensor network technology industry, nor about 60GHz 802.11ad and 802.11ay the bridge and cable replacement applications for multi-point GbpsThe potential role of point of connection right. Ultimately, the 2019 Hannover Messe Industrial Wi-Fi should be a wake-up call. Solution providers can not only rely on their traditions and existing deployment in the industrial field, and the urgent need to actively promote the Wi-Fi industry solutions, not necessarily in direct competition, can be used with 5G, to help achieve a safer, more reliable , more flexible, more efficient digital manufacturing environment. 5G networking and industrial automation Alliance is a typical example Wi-Fi ecosystem lacking, and operators do a better job in promoting their manufacturing environment connectivity solutions than Wi-Fi supporters. Collaborative work and test platform to show where Wi-Fi connection machine use cases and return on investment (ROI) advantages? Where Wi-Fi Arena in? Wi-Fi ecosystem must focus on self-promotion in the industrial environment of Wi-Fi technology functions. So far, this leads to overemphasis on Wi-Fi can not do anything and limited promotion, but not recognized Wi-Fi can do.


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