The US has a rather slow 5G rollout. Photo: NetEase Since the advent of 5G technology, US carriers have been slow to deploy 5G networks. The main reasons are limited spectrum resources available for 5G, cumbersome deployment of 5G devices, and lack of killer applications for 5G services. The media often uses words like “fast” to describe 5G speeds, but the speed of 5G wireless network rollout in the US has nothing to do with the word. Over the past three years, the prospect of 5G wireless networks has been the focus of major media reports. But for most Americans, the real 5G that can achieve the desired effect is yet to emerge. Although all the major wireless carriers in the country claim that their 5G services have covered the entire US, industry analysts argue that this so-called 5G service is not much different from the US. 4G. According to market research firm Evercore ISI, most Americans may not enjoy 5G service that is significantly faster than current wireless communication networks. “Overall, it is expected that between late 2021 and late 2023, truly better 5G services will cover two-thirds of the US population,” said James Ratcliffe, an analyst at Evercore ISI. The first batch of mobile phones that support 5G networks was launched in mid-2019, according to Ratcliffe, in the most optimistic scenario, wireless network operators will be able to provide “real” 5G services to 2/3 of the US population in the next 30 months. Meanwhile, the first mobile phone to support 4G network was released in 2010, and the US 4G network was basically rolled out 18 months later. Analysts, academics and former industry executives say a combination of factors has resulted in a relatively slow rollout of 5G networks in the US. Some of these problems are related to network infrastructure: high-speed network transmission frequency bands and signal coverage are limited. Moreover, the new network equipment that needs to be on the shelves to deploy 5G networks is relatively cumbersome. In addition, many new devices are not made in the US, so the time to purchase the device will be longer. Industry observers also point out that the current 5G network still lacks breakthrough applications, and cannot stimulate user demand and promote the spread of services such as mobile video in 4G networks. John Roese, chief technology officer of Dell Technologies and a former executive at companies like Huawei and Nortel, said that although wireless operators have recently invested billions of dollars in 5G networks, when Because their revenue in 5G-related businesses is not stable, they may not be able to accelerate the construction of new networks. According to Mr. Roese, wireless network operators have had disappointing returns when investing in 4G networks. He said that the main beneficiaries of 4G networks are technology companies that provide applications and other services through the network. “So wireless operators are very cautious about this.” Limited frequency range Photo: Sina To meet the large traffic that 5G networks have to transport, carriers need to open “highways” for data. The spectrum is similar to the real estate that the government grants to carriers through auctions to build highways. The more land they have, the more lanes they can open for faster 5G and easier access. Currently, 5G networks mainly transmit data through low-band, mid-band and high-band. High-band (mmWave) aka millimeter wave has the highest data transfer rate and largest bandwidth, but the smallest coverage. Low band has wider coverage but slowest transmission speed. Finally, the mid-band is considered to be the balance between coverage and transmission speed. Companies like Verizon, AT&T, and T-Mobile all claim that their 5G networks now cover more than 200 million Americans, enough to meet US demand. However, most of these networks rely on low-band radio waves to complete coverage, and network transmission speeds are limited. Wireless network operators are currently focused on capturing mid-bands and have invested a lot of money in recent tenders for these resources. But the main problem facing these companies is that most of the mid-band bands have been occupied by US government agencies and other agencies, mainly for military communications and meteorological services. . Until now, wireless network operators could only use a fraction of the mid-band resources. US government agencies are also aware of the lack of mid-band resources. Earlier this year, the US auctioned a total of $81 billion in mid-band licenses, and plans to hold another auction this fall. When operators were preparing to roll out 5G nearly 10 years ago, they generally believed that 5G networks would primarily use high-frequency radio waves, said Stefan Pongratz, analyst at Dell’Oro Group. . This portion of the spectrum resource is essentially unused. But Pangraz says that rolling out a 5G network using millimeter waves requires building more base stations, which will certainly take time to increase deployment density of base stations. He said that until recent years, the US turned its attention to mid-band radio waves as a way to roll out 5G networks faster. Where is the profit point? Photo: Justin Hall Comics Brian Kelley, an associate professor of electrical engineering at the University of Texas at San Antonio, said the lack of disruptive applications is another major factor hindering the rollout of 5G networks. Mr. Kelly, who was an engineer at Motorola, said: “It can be said that this is the biggest factor that can stimulate the speed of 5G deployment.” According to analyst Craig Moffett, the 3 main advantages of 5G networks are faster data transmission (100 times faster than 4G), support for a large number of simultaneous connections, but also significantly improved response speed between devices. device is connected. “There isn’t a single revenue model that can combine these three advantages. It’s not even clear if consumers are willing to pay more for faster video downloads,” Moffett said. Moffitt said that because 5G networks can seamlessly connect sensors and other IoT devices, companies will likely be the first adopters of 5G services. He said that 5G networks “can be considered the next generation of Wi-Fi wireless networks, which are faster, more secure and can connect more devices”. But Moffett said the question is: “Will wireless operators build their own 5G networks for enterprises, or will the enterprises themselves deploy them?” This is important, he says, because if businesses choose to deploy their own 5G networks, wireless operators may lose the associated revenue and not be able to invest more money in building infrastructure. 5G layer. Device problem Currently, in the world, there are 5 companies that have successfully produced network equipment for 5G, none of which is in the US. Photo: Sina 5G networks are very different from 4G, in part because 5G networks need to transmit data at a higher frequency band. This means that upgrading 5G networks requires different technologies and devices. Evercore analyst Ratcliffe says installing new equipment can require finding a suitable location, obtaining the right permits, and even digging up roads and laying fiber optic cables to transfer data at high speeds between base stations. Gazzola, chief executive officer of Atlanta-based infrastructure company Bennett & Pless, said it is expected that by 2022, the construction work needed to bring wireless communication networks to 5G standards will increase. . However, the epidemic and technical obstacles have delayed progress. Equipment availability is also a common issue faced by wireless network operators. Dell’s Rose said that when 4G was first introduced around 2010, there were about a dozen technology vendors offering wireless networking equipment, including Canada’s Nortel and America’s Motorola. Today, there are only five major players in the global network equipment market: Nokia, Ericsson, Samsung, ZTE and Huawei. “Two in China. One in Finland, one in Sweden and one in Korea.” These suppliers are all located outside the US. Worse still, 5G network equipment requires computer chips while the chip industry has been struggling recently to cope with supply shortages.

Specifically, China accounts for 35% of about 38,000 6G-related patents in the world, or 13,449 patents. In second place is the US with the number of patents accounting for 18%. The 6G network is expected to be 100 times faster than 5G. Photo: PhoneArena. While the US and Europe have launched 6G research projects, strengthening cooperation to ensure benefits, CNIPA said that China has “taken advantage of the technology from 5G networks to continue to be at the forefront”. According to CNIPA, the country of billions should cooperate with a number of Japanese and Korean companies such as NEC, Samsung, and Mitsubishi to “reduce dependence on American and European technology” in some important areas of the 6G network. . Although China leads the world in 6G patents, only one Chinese company makes the list of the top 10 6G enterprises in the world. According to the PhoneArena , the three names holding the most 6G patents include NEC, Daewoo Communications and Mitsubishi. In the areas of artificial intelligence (AI) and terahertz of 6G, China accounts for 75% and 40% of patents globally, respectively. Regarding terahertz in 6G networks, the two largest patent holders are the University of Electronic Science and Technology of China, and China University of Metrology. Although it will take many years to perfect, 6G is expected to bring speeds of terabits, 100 times faster than 5G networks, wide coverage from underwater to space. Some applications of 6G such as immersive augmented reality environment, high-fidelity 3D image display. The speed of 6G brings benefits in many future fields, not only for users but also in the military sector, which is why industrialized countries are vying for the top spot in the research race. 6G. In November 2020, Google and Apple joined “The next G Alliance” (The next G Alliance) with the goal of making the US lead the world in the 6G race, reinforcing the long-term development of the company. 5G network. In February, Apple recruited a number of positions specifically related to 6G, the main work included “researching and designing next-generation wireless communication systems (6G) for wireless networks”, “participating in industry, academic forum on 6G”. In February 2019, former US President Donald Trump also mentioned 6G. “I want to have 5G, even 6G in the US as soon as possible. It’s stronger, faster and smarter than today’s standards. American companies have to work if they don’t want to be left behind,” Trump said. on Twitter. China launches first 6G satellite tinh This 6G satellite will be used to test systems for smart cities, environmental protection, disaster prevention and mitigation.

Combined with the Find My app on iPhone, iPad and the global iOS device network (Find My network), AirTag users can locate the device even when the device is out of Bluetooth coverage. “If the AirTag gets lost and out of Bluetooth coverage, the Find My device network can locate it… Using billions of Apple products around the globe, they will catch the lost Bluetooth emitted by the AirTag the owner’s device location anonymously and privately “, Apple shares about the AirTag’s location feature. As such, AirTag does not have GPS. This means the device cannot notify the real-time location to the user. Besides, GPS allows independent operation, no need for range of connection like AirTag. Having range of connectivity means that AirTag may be out of network coverage. If the device is out of Bluetooth coverage and is not near any iPhone, the AirTag will not be able to display the exact location. In Vietnam, AirTag is priced at VND 790,000. Photo: Apple. In addition, Apple claims the location is not saved in AirTag, data transmitted to the Find My app is also end-to-end encrypted. After being launched by Apple, many people said the Find My network was a loophole, making AirTag can be abused to track other people. However according to the page Mashable Apple has designed a special feature on AirTag to help prevent this. Specifically, Apple describes that iOS devices can detect lost AirTag from its owner. Also plays a notification if an AirTag moves with them from one place to another. If the tracked person is not using an iOS device, the AirTag itself will play an alert bell while on the move to get attention (if it is lost from the owner for a long time). If detecting strange AirTag, users can turn it off by touching iPhone or NFC-enabled device and then following the instructions. However, Apple has not yet said what the ringing will be from AirTag. The time it takes for AirTag to ring the bell since leaving the owner’s hand has not been revealed. Therefore, using AirTag to spy on others is still worrying experts. Apple launches new purple iPhone and improved iPad Pro M1 During the Spring Loaded event taking place at 0:00 on April 21 (Vietnam time), Apple introduced a series of products including iPhone 12 purple version, new design iMac, AirTag card, iPad Pro M1.

Staff installing a 5G base station in Korea. Photo: Koreabizwire According to the ministry above, carriers include SK Telecom Co., KT Corp. and LG Uplus Corp. signed an agreement so that 5G users could access the high-speed network of any other service provider they registered in 131 remote locations across South Korea. Accordingly, 5G users will be able to use another carrier’s network in places where their service provider does not have coverage. The Ministry of Science and ICT said telecom carriers will test network sharing systems before the end of the year and aim to fully phased in by 2024. Remote areas selected to provide 5G network sharing are sparsely populated, with a population density of 92 people / km2, while areas that do not share 5G networks have a population density of 3,490. person / km2. The move to share 5G networks comes as South Korea is racing to establish 5G coverage nationwide, with network equipment currently installed in major cities. In July 2020, the three major South Korean carriers pledged to invest up to 25,700 billion won (23.02 billion USD) to upgrade the network infrastructure by 2020. As of February 2021, South Korea has 13.66 million 5G subscribers, accounting for about 19% of the country’s total mobile network subscribers. South Korea was the first country in the world to commercialize 5G networks in April 2019.