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04-22-2022

2G, 3G quit the Internet of Things! The Ministry of Industry and Information Technology issued a major document

On May 7, the Ministry of Industry and Information Technology issued the "Notice on Further Promoting the All-round Development of Mobile Internet of Things" to guide new IoT terminals to gradually withdraw from 2G or 3G networks and fully migrate to NB-IoT and 4G (LTE Cat1); ... On May 7, the Ministry of Industry and Information Technology issued the "Notice on Further Promoting the Comprehensive Development of Mobile Internet of Things" to guide new IoT terminals to gradually withdraw from 2G or 3G networks and fully migrate to NB-IoT and 4G (LTE Cat1); And it is planned to... On May 7th, the Ministry of Industry and Information Technology issued the "Notice on Further Promoting the Comprehensive Development of Mobile Internet of Things", guiding new Internet of Things terminals to gradually withdraw from 2G or 3G networks, and comprehensively to NB-IoT and 4G (LTE Cat1 ) migration; and plans to... On May 7th, the Ministry of Industry and Information Technology issued the "Notice on Further Promoting the Comprehensive Development of Mobile Internet of Things", guiding new IoT terminals to gradually withdraw from 2G or 3G networks, and fully move towards NB-IoT and 4G (LTE Cat1) migration; and plans to...

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04-22-2022

2G, 3G quit the Internet of Things! The Ministry of Industry and Information Technology issued a major document

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03-31-2022

What is the difference between Beidou satellite positioning system and GPS positioning system?

The Beidou system and GPS positioning methods and principles are in the same line. GPS was designed in the 1970s and formed in the 1990s, while the Beidou system (the official Beidou system is the second generation of Beidou) was launched in 2004, which is actually an imitation of GPS. So it can be said that Beidou and GPS are basically the same, and they both provide location/time information for users: the user holds a navigator and analyzes the user's location by receiving GPS/Beidou satellite signals. By the way, the second generation of Beidou is passive positioning, that is, the knowledge navigator receives satellite signals and does not transmit signals to satellites, so there is no SMS function. In the specific implementation of this function, the two systems are different in many aspects, such as the signal frequency points, satellite constellations, coordinate systems, etc. mentioned by other people. However, since the two systems are both for the purpose of providing user positions, the core difference should be the difference in positioning accuracy between the two systems, and other differences, some of which are basically irrelevant (such as using different time/ The spatial coordinate system is essentially just a convention), and some are mainly reflected in the impact on positioning accuracy. Of course, the positioning accuracy is the higher the demand, the better. Then the difference between the newly developed Beidou and GPS is mainly 1) There are some things in GPS

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03-31-2022

5G transmission technology test goes further and related sectors have a good performance

Recently, Wen Ku, director of the Department of Communication Development of the Ministry of Industry and Information Technology, pointed out in his speech that 5G, as the main direction of the development of the new generation of communication technology,

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03-31-2022

(5G) Promotion Group Releases Phase 2

Recently, Wen Ku, Director of the Department of Communication Development of the Ministry of Industry and Information Technology, pointed out in his speech that 5G, as the main direction of the development of a new generation of communication technology, will become an important driving force to promote national economic and social development and promote industrial transformation and upgrading.

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03-31-2022

Will a wireless router with multiple antennas work better?

Shenzhen Aerospace Communication Antenna Manufacturer Antenna Knowledge. A strange consumption habit exists in the daily consumption behavior of most consumers. When the price is almost the same, consumers tend to choose products with "large quantity". In addition, the phenomenon of following the trend is also very serious. Many facts have not been verified by themselves, and they have taken the initiative, "I will buy whichever product is bought by more people." The most representative group are the fans of "God Car Party" and "Heavy Doors". Similarly, most consumers who buy wireless routers have also fallen into the misunderstanding of "multiple wireless signals with antennas", and blindly followed the trend, and even became "the party with only the number of antennas". Is the factor affecting wireless signals really the number of antennas? Eliminate misunderstandings, the more antennas in wireless routing, the better? Why do wireless routers have multiple antennas? Just as aunts go shopping for groceries in the supermarket, "increase the quantity without increasing the price" is the sign that attracts their attention the most. "More", "big" and "cheap" deeply affect people's desire to buy. The same is true for consumers of wireless routers. The "god logic" that "built-in antennas must be inferior to external antennas" has always had a decisive impact on consumers' consumption concepts. In order to win the favor of consumers, some wireless router manufacturers even deliberately changed the internal antenna design to the external antenna design. This is like car manufacturers curry favor with Chinese consumers, adding a "butt" to the originally beautiful hatchback and turning it into a sedan as "horrible". Eliminate misunderstandings, the more antennas in wireless routing, the better? Are so many antennas really useful? When we open the wireless router product page of the e-commerce website, we can find that among the top ten wireless router products in terms of sales, wireless routers with three or more antennas occupy more than half of the positions. This phenomenon reflects that when consumers buy wireless routers, multi-antenna (more than two) wireless routers are very popular among consumers. Of course, multiple antennas have their advantages, but if there are more than three antennas in practical applications, it is generally meaningless in home scenarios. www.hangyu-sz.com Eliminate misunderstandings, the more antennas in wireless routing, the better? The home environment is complex, and the signal cannot be transmitted directly The use environment in the general family is more complicated. Both household appliances and walls block wireless signals, so that there is almost no direct signal from the transmitter to the receiver. The wireless signals reflected and transmitted by various items in the home form a phenomenon of "multipath transmission", and the data transmitted to the receiving end by different routes will be delayed, so we intuitively feel that the network has become "stuck". Eliminate misunderstandings, the more antennas in wireless routing, the better? MIMO technology "save the world" Then there is the "MIMO" technology that saves the world. Using MIMO transmission technology requires the support of multiple antennas. The router can divide the data into multiple parts and send them from different antennas, and integrate them at the receiving end. Taking 2x2MIMO as an example, it is like two people working at the same time, which doubles the original work efficiency, increases the wireless speed and significantly improves the communication quality.

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