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Method, device and system for high-speed mobile communication

A technology of high-speed movement and moving distance, applied in the directions of synchronization devices, wireless communication, electrical components, etc., can solve problems such as inability to apply high-speed movement and instability

Inactive Publication Date: 2018-06-08
深圳地空互联技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This system directly applies the existing ground mobile communication system to the air, and is limited to low-altitude general-purpose aircraft below 3,000 meters. It does not do special processing for high-speed movement. The actual speed experience is similar to that of mobile phones on high-speed rail, unstable and intermittent. It cannot be applied to high-speed moving scenes

Method used

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  • Method, device and system for high-speed mobile communication
  • Method, device and system for high-speed mobile communication

Examples

Experimental program
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Effect test

Embodiment 1

[0059] In the LTE communication standard, there is a corresponding relationship between TA and distance, expressed as distance D=F(TA) and TA=G(D) respectively.

[0060] Such as figure 1 As shown, step 100 is executed, the UE normally transmits uplink data PUSCH / PUCCH / SRS, and records the current time T0. Step 110 is executed, the base station calculates TA0 according to the uplink data, and notifies the terminal. Execute step 120, the time of the TA notification obtained by the terminal is T1, and the uplink transmission time of the application of this TA is T2, then the time difference ΔT=T2-T0 is obtained; according to the moving distance and the moving direction of the terminal within the time ΔT, calculate Get the final TA value TA2. Step 120 comprises following sub-steps, (as Figure 1A shown): Execute step 121, calculate the moving distance ΔD=S×ΔT within ΔT time, where S represents the flight speed. Step 122 is executed to calculate the line-of-sight distance D0=F(...

Embodiment 2

[0064] Such as figure 2 As shown, the device applied to high-speed mobile communication includes a baseband unit 200 , an optical fiber line 210 , a radio frequency unit 220 and an antenna 230 .

[0065] The baseband unit 200 is composed of a memory 201 , a processor (DSP / ARM) 202 , programmable hardware (FPGA) 203 and a photoelectric converter 204 . The baseband unit 200 mainly implements upper-layer protocol and signaling processing of the airborne terminal equipment, user plane data processing, and baseband function processing. The memory 2011 is used to store temporary or intermediate process data. The processor (DSP / ARM) 202 and the programmable hardware (FPGA) 203 together perform efficient arithmetic operations and signal processing. The photoelectric conversion module 204 mainly converts optical signals and electrical signals, and at the same time performs interface protocol processing related to photoelectric signal transmission.

[0066] The optical fiber line 21...

Embodiment 3

[0070] The device applied to high-speed mobile communication is suitable for broadband communication of aircraft, especially high-speed flying aircraft (greater than 500Km / h), including high-altitude passenger aircraft, ground-air high-speed aircraft, and spacecraft in space.

[0071] Such as image 3 As shown, the device applied to high-speed mobile communication is installed on the aircraft. The baseband unit 300 is installed on the nose of the aircraft, and is connected to the radio frequency unit 320 installed at the rear of the aircraft through the optical fiber 310 , and the radio frequency unit 320 is connected to the antenna 330 .

[0072] In this embodiment, the radio frequency unit 320 is far away from the baseband unit 300, which has the following two advantages:

[0073] 1) Easy to maintain after installation;

[0074] 2) Reduce signal loss, that is, achieve the purpose of energy saving.

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Abstract

The invention provides a method, device and system for high-speed mobile communication, wherein the method comprises the steps of: normally transmitting uplink data PUSCH / PUCCH / SRS on UE, and recording the current time T0, wherein the PUSCH represents an uplink control channel; the PUCCH represents an uplink shared channel; and the SRS represents a sounding reference signal; according to the uplink data, obtaining TA0 by calculation by a base station, and notifying the UE; obtaining the final TA value TA2 by calculation; and, obtaining the final time synchronization adjustment amount at the T2time according to the TA2, and, on this basis, transmitting the uplink data. According to the method, device and system for high-speed mobile communication provided by the invention, on the basis ofan airborne terminal, calculation is carried out corresponding to the movement distance of the base station; inaccurate TA sent by the base station is corrected; therefore, the problem that TA estimation is inaccurate due to high-speed movement of an LTE system in an ATG network can be solved; and thus, the performance of an LTE ATG system is improved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method, device and system applied to high-speed mobile communication. Background technique [0002] LTE is Long Term Evolution (time-sharing long-term evolution), which is one of the fourth-generation (4G) mobile communication technologies and standards. The limited spectrum bandwidth resources have stronger service provision capability, which is exactly the goal pursued by the global mobile communication industry. [0003] On the other hand, with the continuous development of user data service requirements, the need to provide data service access and services on civil aviation aircraft is becoming more and more urgent. Due to the high cost and capacity limitations of satellite communications, the ATG (Air To Ground) ground-to-air communication system that deploys base stations on the ground to cover the air is an efficient and ideal solution for civil avi...

Claims

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Application Information

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IPC IPC(8): H04W56/00
CPCH04W56/0005
Inventor 何善明卫利君冀燃
Owner 深圳地空互联技术有限公司
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