A high dynamic conversion method for high-speed railway broadband private network
A conversion method and high dynamic technology, applied in radio transmission systems, electrical components, transmission systems, etc., can solve problems affecting network performance, congestion, and reduction of wireless received signal strength, so as to improve user capacity and increase coverage radius Effect
Image
Examples
Embodiment 1
[0057] A section of railway with a length of T=200km covers LTE base stations. Since the distance between base stations supported by HIDI-LTE is at most R=40km, this section of railway only needs N=5 base stations. The height of the base station is h=30m, and the distance between the base station and the rail is d=100m. Such as image 3 As shown, the train is traveling at a speed of v=400km / h, at time t1, the distance between point C and point D is L=2km, and the operating frequency of the signal is assumed to be f=3.5GHz. The communication method of HIDT-LTE is the vehicle-to-ground communication mode.
[0058] The high dynamic conversion steps of the high-speed rail broadband private network are as follows:
[0059] Step 1: HIDT-LTE uses GNSS and inertial navigation integrated navigation receiver to receive the navigation signal transmitted by the GNSS navigation subsystem, and performs positioning to obtain the position information of the train at the current time t1, tha...
Embodiment 2
[0069] The length of the railway and the distance from the base station are the same as in the first embodiment. Such as image 3 As shown, the height of the base station is h=30m, the distance between the base station and the rail is d=100m, the train speed v=300km / h, the time t2, the distance between point C and point D=5km, and the signal operating frequency f=2.5GHz. The communication method of HIDT-LTE is the vehicle-to-ground communication mode.
[0070] The high dynamic conversion steps of the high-speed rail broadband private network are as follows:
[0071] Step 1: HIDT-LTE uses GNSS and inertial navigation integrated navigation receiver for positioning, and obtains the position information of the train at time t2, that is, the position of point D (X2, Y2, Z2);
[0072] Step 2: HIDT-LTE obtains the location information (Xb, Yb, Zb) of base station B at point D by using the dedicated electronic map for high-speed rail, the base station height h=30m, the distance betw...
Embodiment 3
[0081]When the train runs to an area without ground LTE base station coverage, for example, the current position information of the train is (40°N, 116°E); the electronic map contains the information of available communication satellites and available frequency points in the area, such as the currently available satellite is Xing 12 satellite (87.5°E), the satellite is a geosynchronous orbit satellite, the available frequency point information is uplink 6GHz, downlink 4GHz, the control unit switches the working mode of HIDT to vehicle-satellite communication mode, at this time the MS-MIMO antenna adopts Single antenna working mode. In the vehicle-satellite working mode, the control unit uses the servo platform to control the antenna to align with the Zhongxing-12 satellite in real time.
[0082] The process of sending information from user A in the car to user B on the external network is as follows: User A in the car sends a signal to the Zhongxing No. 12 satellite through HI...
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Description
Claims
Application Information
- IPC
- H04B7/185; H04L29/08
- CPC
- H04B7/1853; H04B7/18578; H04L67/12
- Inventors
- 艾国祥; 金声震