A test system for terminal inter-star handover

Abstract

The application discloses a kind of terminal cross star switching test system, it is related to satellite communication test field.The application is directed to the problem that non-geostationary orbit satellite high-speed motion, terminal frequent cross star switching function is difficult to verify, proposes a kind of efficient simple, verifies front, test auxiliary design ground wired test system.The working scene of the test system design accords with the actual working scene of non-geostationary orbit satellite system, test switching process is close to actual work flow, system is connected using wired mode, including ground terminal, at least two analog satellites, cross star switching simulator and navigation simulation source;It is simple to be composed, without receiving and transmitting antenna, power amplifier, wireless environment, microwave darkroom and other complex wireless environment or equipment;The application is especially suitable for non-geostationary orbit satellite terminal cross star switching function design, verification and test, and is also especially suitable for non-geostationary orbit satellite system terminal cross star switching process design, verification and test.

Description

TECHNICAL FIELD

[0001] The present application relates to a terminal cross-satellite switching test system, which can be used for testing and verifying the cross-satellite switching function of a non-geostationary satellite communication system and a ground terminal device, and can also be used for testing and verifying the system cross-satellite switching process. The test method is efficient and simple, the test system is simple to constitute, and the present application belongs to the field of satellite communication testing. BACKGROUND

[0002] With the rapid development of satellite Internet, a non-geostationary satellite constellation has already formed a scale. In order to make the non-geostationary satellite system transition from the experimental stage to the trial stage and make the ground terminal achieve the purpose of long-term stable work, designers have designed a terminal cross-satellite switching function. The actual working scene of the terminal cross-satellite switching is a wireless environment, which requires wireless signal on-off and satellite-ground system synchronization. Since the terminal cross-satellite switching function has high requirements on the system and the working process is complex, it is urgent to design a simple and effective test method and system to improve the development efficiency of the equipment and system and meet the terminal cross-satellite switching function and process testing and verification. SUMMARY

[0003] The present application aims to avoid the shortcomings in the background art and provides a terminal cross-satellite switching test system, which effectively solves the problem of equipment function and system process verification when the terminal frequently switches between satellites. The present application is particularly suitable for non-geostationary satellite terminal cross-satellite switching function design, verification and testing, and is also particularly suitable for non-geostationary satellite system terminal cross-satellite switching process design, verification and testing.

[0004] The technical scheme adopted by the present application is as follows:

[0005] A terminal cross-satellite switching test system, comprising a ground terminal, at least two simulated satellites, a cross-satellite switching simulator and a navigation simulation source;

[0006] The navigation simulation source is used for receiving simulated signal parameters, generating a low dynamic simulation signal and at least two high dynamic simulation signals, and forwarding the low dynamic simulation signal to the ground terminal and the high dynamic simulation signals to the corresponding simulated satellites;

[0007] The simulated satellite is used for receiving the high dynamic simulation signal of the navigation simulation source, analyzing the orbit information and time information of the current satellite, and generating a transceiver signal time slot arrangement rule based on the data type, and generating a downlink signal according to the transceiver signal time slot arrangement rule, and transmitting the downlink signal to the cross-satellite switching simulator and receiving the uplink signal sent by the cross-satellite switching simulator;

[0008] The ground terminal is used for receiving a low dynamic analog signal of a navigation analog source, resolving position information and time information of the terminal, and generating an initial switching control signal according to the time information, and controlling the cross-satellite switching simulator to connect the ground terminal and the analog satellite by using the initial switching control signal; and is also used for receiving a downlink signal sent by the cross-satellite switching simulator, resolving a transceiver signal time slot arrangement rule and satellite orbit information, and generating a switching control signal according to the transceiver signal time slot arrangement rule, the terminal time information and the satellite orbit information, and controlling the cross-satellite switching simulator to connect the ground terminal and the analog satellite by using the switching control signal, and sending an uplink signal and the switching control signal to the cross-satellite switching simulator;

[0009] The cross-satellite switching simulator is used for receiving the switching control signal and the uplink signal sent by the ground terminal, receiving a downlink signal sent by the analog satellite, forwarding the downlink signal to the ground terminal, and resolving the switching control signal, and forwarding the uplink signal to the corresponding analog satellite according to the resolved control information.

[0010] Further, the analog signal parameters received by the navigation analog source include orbit of each analog satellite, longitude, latitude and height of the ground terminal, system time and visible time of the satellite to the ground terminal.

[0011] Compared with the prior art, the present application has the following advantages:

[0012] 1. The present application supports the design, verification and testing of the cross-satellite switching function of the non-geostationary satellite terminal, and supports the design, verification and testing of the cross-satellite switching process of the non-geostationary satellite system terminal.

[0013] 2. The test method designed by the present application is efficient, and the test system is simple and easy to build.

[0014] 3. The present application puts verification first and integrates design and verification, which can accelerate the development progress of the terminal cross-satellite switching function of the equipment and system, and improve the design and development efficiency.

[0015] 4. The present application can verify the cross-satellite switching function and process on the ground, which reduces the design risk and accelerates the in-orbit test progress. The working scene designed by the test system conforms to the actual working scene of the non-geostationary satellite system, and the test switching process is close to the actual working process.

[0016] 5. The system of the present application is connected in a wired manner, and is simple in composition, without the need for complex wireless environments or equipment such as transceiver antennas, power amplifiers, wireless environments, microwave dark rooms, etc. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a terminal switching test system composition diagram of the present application. DETAILED DESCRIPTION

[0018] The application is further illustrated below in conjunction with the accompanying drawings Figure 1 and specific embodiments.

[0019] The application is a terminal cross-satellite switching test system, which designs a test method according to an actual work flow, and the test method is simple; a most simple test system is built by simulating a real working environment, and the system can verify a work flow internally and test new equipment externally. Figure 1 As shown in the figure, the test system comprises a ground terminal, at least two simulated satellites, a cross-satellite switching simulator and a navigation simulation source.

[0020] The steps of the application are as follows:

[0021] The navigation simulation source is used to receive simulation signal parameters, which comprise the running orbit of each simulated satellite, the longitude, latitude and height of the ground terminal, system time and the visible time of the satellite to the ground terminal, and the simulation signal parameters are subjected to data analysis, simulation model generation and digital-analog signal conversion to generate low dynamic simulation signals and at least two high dynamic simulation signals, the low dynamic simulation signals are forwarded to the ground terminal, and the high dynamic simulation signals are forwarded to the corresponding simulated satellites;

[0022] The simulated satellites are used to receive the high dynamic simulation signals of the navigation simulation source, analyze the running orbit information and time information of the star, and generate a receiving and transmitting signal time slot arrangement rule based on the data type, and generate a downlink signal according to the receiving and transmitting signal time slot arrangement rule, wherein the downlink signal comprises satellite running orbit information, time information, receiving and transmitting signal time slot arrangement rule and other data, and the simulated satellites transmit the downlink signal to the cross-satellite switching simulator and receive the uplink signal sent by the cross-satellite switching simulator;

[0023] The ground terminal is used to receive the low dynamic simulation signals of the navigation simulation source, analyze the position information and time information of the terminal, and generate an initial switching control signal according to the time information, and use the initial switching control signal to control the cross-satellite switching simulator to connect the ground terminal and the simulated satellites, and the ground terminal also receives the downlink signal sent by the cross-satellite switching simulator, analyzes the receiving and transmitting signal time slot arrangement rule, satellite running orbit information in the downlink signal, and generates a switching control signal according to the receiving and transmitting signal time slot arrangement rule, terminal time information and satellite running orbit information, and the ground terminal sends the switching control signal to the cross-satellite switching simulator, and the switching control signal controls the connection of the ground terminal and the simulated satellites, and after the connection, the ground terminal sends an uplink signal to the cross-satellite switching simulator;

[0024] The cross-satellite switching simulator is used for receiving the switching control signal and the uplink signal sent by the ground terminal, receiving the downlink signal sent by the analog satellite, analyzing the switching control signal into control information, and selecting the analog switch inside the device according to the control information, controlling the downlink signal to be forwarded to the ground terminal, and controlling the uplink signal to be forwarded to the corresponding analog satellite.

Claims

1. A test system for terminal cross-satellite handover, characterized in that, Includes a ground terminal, at least two simulated satellites, a cross-satellite handover simulator, and a navigation simulation source; The navigation simulation source is used to receive analog signal parameters, generate low-dynamic analog signals and at least two high-dynamic analog signals, forward the low-dynamic analog signals to the ground terminal, and forward the high-dynamic analog signals to the corresponding analog satellites; The simulated satellite is used to receive high-dynamic simulation signals from the navigation simulation source, analyze the local satellite's orbit and time information, generate a transmit / receive signal time slot arrangement rule based on the data type, generate downlink signals according to the transmit / receive signal time slot arrangement rule, transmit downlink signals to the inter-satellite handover simulator and receive uplink signals sent by the inter-satellite handover simulator; The ground terminal is used to receive low-dynamic analog signals from the navigation simulation source, parse its own position and time information, and generate an initial handover control signal based on the time information. It then uses the initial handover control signal to control the inter-satellite handover simulator to connect the ground terminal and the simulated satellite. It is also used to receive downlink signals from the inter-satellite handover simulator, parse the transmit / receive signal time slot arrangement rules and satellite orbit information, and generate a handover control signal according to the transmit / receive signal time slot arrangement rules, terminal time information, and satellite orbit information. The handover control signal is then used to control the inter-satellite handover simulator to connect the ground terminal and the simulated satellite, and to send uplink signals and handover control signals to the inter-satellite handover simulator. The inter-satellite handover simulator is used to receive handover control signals and uplink signals sent by the ground terminal, receive downlink signals sent by the simulated satellite, forward the downlink signals to the ground terminal, parse the handover control signals, and control the uplink signals to be forwarded to the corresponding simulated satellite according to the parsed control information.

2. The terminal cross-satellite testing system according to claim 1, characterized in that, The analog signal parameters received by the navigation simulation source include: the orbits of each simulated satellite, the latitude and longitude of the ground terminal, the system time, and the time when the satellite is visible to the ground terminal.

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