The invention relates to the technical field of the communication, and is a testing terminal positioning method suitable for a high-speed railway network The method is used for positioning the testing terminal in the testing GPS missing of a communication industry artery traffic network The method comprises the following steps: positioning the testing terminal when a train penetration loss in the network testing causes the GPS missing by using the operator eNodeB azimuth angle and a high-speed rail map, discretizing track longitude and latitude points in the eNodeB coverage range, taking a specific value of the track longitude and latitude points to the testing terminal RSR sampling points as an interpolation period, interpolating the track longitude and latitude points in the GPS missing, and taking the track longitude and latitude points as the location information of the testing terminal Through the method disclosed by the invention, the location of the testing terminal can be positioned under different GPS miss rates, namely, the GPS missing is existent at the whole journey or partial section; the existing positioning equipment configuration is unnecessary to change, the equipment operation cost cannot be increased, and the train positioning efficiency is improved at the same time

Testing terminal positioning method suitable for high-speed railway network

The invention discloses a tunnel microwave communication transmission system and method. The tunnel micro base station system (1) comprises a supporting seat frame, an antenna, a radio remote unit, abaseband unit, a core network, a network server and a power supply. The tunnel micro base station system is used for, on one hand, interacting with MME/S-GW of a mobile communication exchange center to realize connection with an external network and on the other hand interacting with a vehicle-mounted terminal system so as to perform sending and receiving processing on a wireless interaction signal; the vehicle-mounted terminal system comprises an antenna base, an antenna cover, a GNSS antenna, a vehicle-mounted antenna, a vehicle-mounted frequency conversion module, a navigation system combined by GNSS and inertial navigation, a vehicle-mounted terminal device, an electronic map, a vehicle-mounted server, a power supply module and a control unit. The vehicle-mounted terminal system (2) isused for performing air interaction on the tunnel micro base station on one hand and providing a WI-FI service for users in cars of a train on the other hand. It is the first time to propose a mannerthat only a few tunnel micro base stations need to be set up in the tunnel to realize the communication in the tunnel; and a solution is proposed for communications in tunnels of complex types including curved tunnels, branched tunnels and the like.

Tunnel microwave communication transmission system and method

The invention provides a glide antenna assembly. The glide antenna assembly comprises a transmitting antenna array and a monitor antenna which are spaced from each other. The transmitting antenna array is composed of a glide iron tower and an upper antenna, a middle antenna and a lower antenna mounted on the glide iron tower; and the height ratio of the upper antenna to the middle antenna to the lower antenna is 2.7 : 2.0 : 1.3. According to the improved glide antenna assembly, the antenna assembly is contracted and the height ratio of the upper antenna to the middle antenna to the lower antenna is 2.7 : 2.0 : 1.3, so that the aperture of the antenna array is reduced, the total height of the glide antenna array is reduced, a monitoring area is reduced, the installation cost is reduced, theworkload of antenna installation, maintenance, debugging and the like is reduced, and the high-altitude operation efficiency is improved.

Glide antenna assembly

Disclosed is a data transmission optimization method for a high-speed railway communication private network. A high dynamic transformer HIDT1 and a high dynamic transformer HIDT2 are respectively placed at the head and the tail of a high-speed railway train, information interaction between users in carriages and an LTE (Long Term Evolution) base station is completed via the high dynamic transformers (HIDTs), and the HIDT1 and the HIDT2 are responsible for forwarding communication information sent from the LTE base station to the users in the carriages down and forwarding information sent fromthe users in the carriages to the LTE base station up. An HIDT terminal is respectively installed at the head and the tail of the high-speed railway train to form a space diversity, and because the two HIDT terminals are far from each other, the probability that the two terminals are simultaneously in fast fading is greatly reduced; and a transmitting controller compares the signal to noise ratios(SNRs) of two paths of received signals to select he HIDT terminal with good signals for transmitting signals, thereby solving the problem of fast fading of signals.

Data transmission optimization method for high-speed railway communication private network

In order to solve the problems that the signal quality is bad, the internet speed is slow and the conversation quality is bad because of the Doppler shift effect and because a train body shields the base station communication signals and a communication device is short of an intelligent, automatic and effective base station switching system, the present invention provides a high-speed railway communication system. The communication system comprises a motor train body system, a Doppler shift elimination system and a signal switching system. The motor train body system includes the motor train body. The Doppler shift elimination system includes a satellite navigation and positioning and constant speed system built in communication device and a real-time perception system configured to perform real-time perception with the relative position and the relative speed of the effective base station. The signal switching system includes a communication device signal perception system and a rapid switching system. Through changing the train body materials taking the aluminum alloy as major components and through adoption of the Doppler shift elimination system and the rapid switching system, the high-speed railway communication system can effectively improve the high-speed railway communication signal quality, the internet speed and the conversation quality so as to facilitate people traveling and improve the time efficiency and the labor productivity.

High-speed railway communication system

The invention provides a high-dynamic transformation method of a broadband special network of a high-speed train The method comprises the following steps: setting a high-dynamic converter (HIDI) on a high-speed train; setting the high-dynamic converter on a train-ground communication mode in a coverage range of ground LTE (Long Term Evolution) base station (eNode) along the line of the high-speed train; and setting the high-dynamic converter on a train-satellite mode when no ground LTE (Long Term Evolution) base station (eNode) covers along the line of the high-speed train The method provided in the invention combines the LTE technology, the satellite navigation technology and the satellite communication technology when the high-speed train moves at 300-500 km/h, so as to provide the broadband mobile communication, the network and the multi-media service for users in the train carriage and the other users moving at a high speed

High-dynamic transformation method of broadband special network of high-speed rail

The invention relates to a microwave switch type multiple-input multiple-output (MS-MIMO) antenna control method for a high-speed rail high-dynamic conversion system (HIDT-LTE) by using a GNSS and an inertial integrated navigation receiver, and relates to a method for combining satellite navigation with an LTE communication technology. The method adopts an antenna control system, wherein the antenna control system comprises the GNSS and the inertial integrated navigation receiver, a data processing module, the MS-MIMO antenna, and an antenna controller; the GNSS and the inertial integrated navigation receiver are used for collecting information of position, heading direction and the like of the train in real time, and are connected with the data processing module through a serial communication interface; the data processing module preferentially selects a communication base station, and calculates the azimuth angle and the pitch angle of the antenna of the train towards the communication base station; in a curve and a tunnel, a mechanical transmission way can be selected according to topographical conditions so as to realize the alignment of the vehicle-mounted MIMO communication antenna and a fixed antenna of the ground base station; and in a flat and open ground, the antenna controller can switch the vehicle-mounted MS-MIMO communication antennas through an electronic switch so as to realize the alignment of the vehicle-mounted MIMO antenna and a fixed communication antenna of the ground base station.

Antenna control method for high-speed rail broadband private network high-dynamic conversion system

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High-dynamic transformation method of broadband special network of high-speed rail

Antenna control method for high-speed rail broadband private network high-dynamic conversion system