Since Huawei released the Mate50 mobile phone, the ability to send emergency text messages through Beidou short messages has attracted much attention. It should be very useful for people who often participate in outdoor activities, or teams such as engineering, inspection, exploration, search and rescue. After all, many places of mobile phone signals are not covered, and few people are equipped with professional equipment such as satellite phone .
For example, in Shenzhen, people have lost contact with climbing in recent years. In the 1980s, the missing incident of Peng Jiamu , if such equipment is posted at any time, it will be convenient for search and rescue personnel to locate and search.
In fact, since the Beidou satellite system launched the short message service, there have been many professional or civilian Beidou short message terminal equipment for everyone to choose from. However, the first is that the price is expensive, at least 4,000 to 5,000 or more, and the second is that it is not easy to use with mobile phones, and both use and carry are shortcomings, so it has always been a niche product. The launch of Huawei's satellite service mobile phones has exploded the market.
As a technician who has long-term tracking and understanding Beidou system , he introduces some technical knowledge I know.
1, which Beidou satellite is used by the Mate50 mobile phone?
Beidou-3 global satellite system consists of three orbit satellites: geostationary orbit (GEO), inclined geosynchronous orbit (IGSO), and medium earth orbit (MEO). Currently, the Beidou system has a total of 45 service satellites in orbit, including 15 Beidou-2 satellites and 30 Beidou-3 satellites , jointly providing users with 7 services. Specifically, it includes: providing three services: positioning navigation timing, global short message communication and international search and rescue; and providing four services: satellite-based enhancement, ground-based enhancement, precision single-point positioning and regional short message communication for the Asia-Pacific region.
30 Beidou-3 satellites, consisting of 3 GEO satellites, 3 IGSO satellites and 24 MEO satellites.
Among them, the geostationary orbit satellite above my country is about 36,000 kilometers away from the ground. Mate50 uses the short message service provided by this satellite.
Beidou satellite distribution map
2 and Mate50 mobile phone satellite functions implementation method. After the
short message data of satellite is sent from the Mate50 mobile phone to the satellite, it is received by the satellite ground station and finally transferred to the mobile operator to the corresponding mobile phone.
Mobile Satellite SMS Data Process
2, Why does Mate50 mobile phone not support satellite signal reception?
Generally, when using a mobile phone, the built-in antenna of the mobile phone will not be directly facing the satellite. If the satellite sends data to the mobile phone, the mobile phone will basically not be able to receive it. Therefore, the function of receiving information is difficult to implement. This is not a technical problem, but a question of how to use it. From the current test, after the satellite short message is successfully sent, there will be a successful sending receipt, which means that the satellite has received a reply, so it should be able to receive satellite signals, but it does not support receiving short messages sent at will. The scope of use of
3 and Mate50 mobile phone satellite functions.
According to the information of the official website of Beidou satellite navigation system , the current Beidou satellite short message communication coverage has covered the world. However, the Mate50 mobile phone only supports GEO satellites over China, covering the entire territory of China and surrounding areas. It can provide Beidou short message services in most areas of 70°-145° east longitude and 5°-55° north latitude.
Mate50 mobile phone usage coverage
4 and Mate50 mobile phone satellite functions charging standards.
According to the existing Beidou satellite short message service, the general short message information is around 0.3 yuan. If the charges start in two years, it will probably be reduced.
5, development direction of mobile phone satellite functions
The existing Beidou satellite short message service adopts the same SIM card method as our mobile phone for user registration and fee records. Huawei Mate50 mobile phone is estimated to have built-in functions like eSIM, or other methods such as mobile phone hardware registration in the Beidou Management Center. Therefore, as a consumer, you do not need to purchase Beidou SIM user card, you can use the satellite short message service.
With the opening of Beidou satellite short message service, global support will definitely be achieved.In addition, Beidou low-orbit satellite will also provide voice, data and other functions to play more and more powerful applications.
Looking forward to more domestic mobile phones supporting Beidou communication functions!
If there are any incorrect or unclear aspects in this article, please point it out and thank you for your comments and forwarding.
