CN114268982B - Vehicle-mounted mobile communication terminal test system - Google Patents
Vehicle-mounted mobile communication terminal test system Download PDFInfo
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Abstract
The invention discloses a vehicle-mounted mobile communication terminal test system, which comprises: the core network unit is used for providing connection of the tested equipment, management of the tested equipment and carrying out service, and is used as an interface for providing a carrying network to an external network; the base station unit is used for receiving the digital signal of the core network unit and converting the digital signal into a radio frequency signal, transmitting the radio frequency signal to the external signal controller unit in a downlink manner, receiving the radio frequency signal of the external signal controller unit and converting the radio frequency signal into a digital signal, and transmitting the digital signal to the core network unit in an uplink manner; the external signal controller unit is used for receiving the signals of the base station unit and carrying out signal conversion, and transmitting the signals to the antenna unit in a downlink manner so as to simulate multipath effect, doppler effect and the like of urban environment; and the network management unit is used for coordinating and/or adjusting the behaviors of the base station units in the network. The invention effectively improves the testing efficiency of the mobile communication network, shortens the testing time, has lower comprehensive testing cost and more comprehensive coverage of the testing result.
Description
Technical Field
The invention relates to the technical field of terminal testing, in particular to a vehicle-mounted mobile communication terminal testing system.
Background
In the existing network-connected automobile, the vehicle-mounted mobile communication terminal is rarely or hardly subjected to comprehensive communication performance evaluation. The evaluation method is usually that after the parts of the vehicle-mounted mobile communication terminal are installed on the vehicle, road tests simulating the use scene of the user are carried out. Two major drawbacks occur in the method, namely excessive whole vehicle resources, manpower resources and test time are required to be consumed in the test, and the project development cost is high; secondly, the coverage of the test network is not comprehensive, for example, in a certain test area, a base station operated by a certain mobile communication carrier is generally in a certain specific frequency band, which results in a great deal of manpower and material resources being spent for testing, and finally, the test network is not covered in all possible network environments.
The invention patent with publication number CN100401824C discloses a mobile communication network test system and a method thereof, comprising a base station controller, a base station, a network coverage measuring server and a mobile station, wherein the network coverage measuring server is used for receiving test data reported by the base station controller and calculating network coverage effect through the base station controller and controlling test flow by the base station controller, and the mobile station is used for acquiring the test data and reporting the test data to the network coverage measuring server through the base station and the base station controller. The invention is mainly used for researching a testing method aiming at a mobile communication network and cannot be used for comprehensively testing and evaluating a mobile communication terminal.
The invention patent with publication number of CN110048908A discloses a network test platform, a network test method and a device, wherein the network platform comprises: the at least one client is used for acquiring configuration information from the page management module; the network server is connected with the at least one client and is used for connecting with the at least one client according to the configuration information and testing the at least one client by executing any one or more of the following operations; network parameter control, flow statistics and information grabbing; the control server is connected with the network server and used for controlling at least one client of the network server to conduct network test. The method aims to solve the technical problem that the network test cost is high because peripheral software is required to be installed on the existing network test platform, and the terminal, particularly the vehicle-mounted mobile terminal, cannot be evaluated and tested.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the technical problems that: how to provide a vehicle-mounted mobile communication terminal test system with higher test efficiency, shorter time, lower comprehensive test cost and more comprehensive test result coverage of a mobile communication network.
In order to solve the technical problems, the invention adopts the following technical scheme:
a vehicle-mounted mobile communication terminal test system, comprising:
the core network unit is used for providing connection of the tested equipment, management of the tested equipment and carrying out service, and is used as an interface for providing a carrying network to an external network;
the base station unit is used for receiving the digital signal of the core network unit and converting the digital signal into a radio frequency signal, transmitting the radio frequency signal to the external signal controller unit in a downlink manner, receiving the radio frequency signal of the external signal controller unit and converting the radio frequency signal into a digital signal, and transmitting the digital signal to the core network unit in an uplink manner;
the external signal controller unit is used for receiving the signals of the base station unit and carrying out signal conversion, and transmitting the signals to the antenna unit in a downlink manner so as to simulate multipath effect, doppler effect and the like of urban environment;
a network management unit for coordinating and/or adjusting the behavior of base station units in the network;
and the antenna unit is used for transmitting the downlink signal of the external signal controller unit to the space environment where the tested equipment is located, receiving the uplink signal of the tested equipment and transmitting the uplink signal to the external signal controller unit.
Further, coordination and/or adjustment instructions of the network management unit to the base station unit are issued via the core network unit.
Further, one or more network management units are connected with the base station units through network cables or buses to perform configuration management on the base station units.
Further, the core network element comprises one or more of a 5G core network, a 4G core network, a 3G core network, and a 2G core network.
Further, the base station unit comprises one or more of a 5G base station, a 4G base station, a 3G base station, and a 2G base station.
Further, the external signal controller unit is an attenuator or a channel simulator.
Further, the device under test and the antenna unit are isolated from external wireless communication signals by a shielding room, so that the test result is prevented from being influenced by random unknown signals.
The present invention also provides an electronic device including: the terminal test system comprises a processor, a display and a memory storing a computer program, wherein the processor executes information interaction control and information storage of the program on the memory to the terminal test system.
Compared with the prior art, the invention has the beneficial effects that:
the external signal controller unit is used for closing or attenuating the radio frequency signal of one base station unit according to a certain mode to normally pass or amplify the radio frequency signal of the other base station unit, so that the scene simulation of connection state interoperation, idle state interoperation and the like is realized. The external signal controller unit can also generate Doppler frequency shift, multipath and other effects by converting the radio frequency signals, and can realize scene simulation of urban canyons, valley signal fading, rapid movement and the like. And transmitting downlink signals of the external signal controller unit to the space environment where the tested equipment is located through the antenna unit. Therefore, the test efficiency of the mobile communication network is effectively improved, the test time is shortened, the comprehensive test cost is lower, and the coverage of the test result is more comprehensive.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the overall structure of a vehicle-mounted mobile communication terminal test system according to the present invention;
fig. 2 is a schematic diagram of a core network unit according to the present invention;
FIG. 3 is a schematic diagram of a base station unit according to the present invention;
FIG. 4 is a schematic diagram of an external signal controller unit according to the present invention;
fig. 5 is a schematic diagram of an antenna unit according to the present invention.
In the figure: a core network unit 11, a base station unit 12, an external signal controller unit 13, an antenna unit 14, a device under test 15, a shielding room 16, and a network management unit 17.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a vehicle-mounted mobile communication terminal test system in this embodiment includes:
the core network unit 11 is configured to provide connection of the device under test 15, management of the device under test, and bearer completion for the service, and provide an interface to an external network as a bearer network.
The base station unit 12 is configured to receive the digital signal from the core network unit, and perform modulation and other processing to form a radio frequency signal, where the radio frequency signal is transmitted downstream to the external signal controller unit. Correspondingly, for uplink signal transmission, the base station unit receives the radio frequency signal of the external signal controller unit, and performs demodulation and other processing to form a digital signal, and uplink transmission is performed to the core network unit.
An external signal controller unit 13, configured to receive the base station unit signal and perform signal conversion, and transmit the signal to the antenna unit in a downlink manner, so as to simulate multipath effect, doppler effect, etc. of the urban environment.
The network management unit 17 is used for coordinating and/or adjusting the behavior of the base station units in the network, and may be a physical entity or simply a virtual entity. The coordination and/or adjustment instructions of the network management unit to the base station unit are issued through the core network unit.
And the antenna unit 14 is used for transmitting the downlink signal of the external signal controller unit to the space environment where the tested equipment is located, receiving the uplink signal of the tested equipment and transmitting the uplink signal to the external signal controller unit.
In the invention, the network management unit 17 sends information such as related data to the core network unit 11, the core network unit transmits the information such as the network management unit data to the unique corresponding base station unit 12 according to the network registration information of the tested equipment, the base station unit receives the information such as the data of the core network unit, and the information such as the data of the core network unit is modulated and the like to form a radio frequency signal, and the radio frequency signal is transmitted to the external signal controller unit 13 in a downlink manner. The external signal controller unit is connected to a plurality of base station units from top to bottom, and the antenna unit 14 effectively transmits the downlink signal of the external signal controller unit to the space environment where the device under test 15 is located. The external signal controller unit can close or attenuate the radio frequency signal of one base station unit according to a certain mode and normally pass or amplify the radio frequency signal passing through the other base station unit, so that scene simulation of connection state interoperation, idle state interoperation and the like is realized. The external signal controller unit can also generate Doppler frequency shift, multipath and other effects by converting the radio frequency signals, and can realize scene simulation of urban canyons, valley signal fading, rapid movement and the like. Conversely, the received rf signal from the antenna unit is similarly processed in reverse by the external signal controller unit and transmitted back to the base station unit. The base station unit receives the radio frequency signal of the external signal controller unit, and forms a digital signal through demodulation and other processing, and uplink transmission is transmitted to the network management unit through the core network unit. Therefore, the test efficiency of the mobile communication network is effectively improved, the test time is shortened, the comprehensive test cost is lower, and the coverage of the test result is more comprehensive.
Specifically, according to the information transmission rate requirement, the network management unit 17 is connected with the core network unit 11 through an ethernet, a USB, an optical fiber, etc., the core network unit 11 is connected with the base station unit 12 through an ethernet, a USB, an optical fiber, etc., and the base station unit 12 is connected with the external signal controller unit 13 through a radio frequency line; the external signal controller unit 13 is connected to the antenna unit 14 via a radio frequency line.
Specifically, the network management unit 17 may be one or more, and is connected to the core network unit through a network cable or a bus, and configured to manage the base station unit through a command issued by the core network unit; the network management unit can also be used as a local server to realize the storage of data information and the running of test application.
Specifically, the core network unit 11 includes one or more of a 5G core network, a 4G core network, a 3G core network, and a 2G core network.
Specifically, base station unit 12 comprises one or more of a 5G base station, a 4G base station, a 3G base station, and a 2G base station. The 5G base station comprises one or more of 5G frequency bands such as N78, N79, N41 and the like; the 4G base station comprises one or more of 4G frequency BANDs such as LTE BAND1, LTE BAND3, LTE BAND8, LTE BAND38, LTE BAND39 and the like; the 3G base station comprises one or more of 3G frequency BANDs such as WCDMA BAND1, WCDMA BAND3 and the like; the 2G base station includes one or more of the 2G frequency bands such as EGSM, DCS, PCS.
Referring to fig. 2, for the present test system, it may be configured to implement information transmission of a single core network, or implement information transmission between different core networks through ethernet or optical fiber, or implement information transmission between a tested device and an external public network through ethernet or optical fiber interface.
Referring to fig. 2 and3, the topology of the core network element and base station element connections is: each of the core network elements is connected to one or more base stations of the base station units via an ethernet or an optical fiber, each of the base station units being connected to only one of the core network elements.
Referring to fig. 3 and 4, the topological relation between the base station unit and the external signal controller unit is: according to practical application, an external signal controller in the external signal controller unit can be connected with a base station radio frequency output port through a radio frequency line, generally, a plurality of channels exist in the external signal controller, each channel can be connected with each base station channel, and for 4G or 5G base stations, multiple transceiving channels also exist and are respectively and correspondingly connected with the external controller according to requirements.
Specifically, the external signal controller unit 13 may be simply an attenuator that needs to be controlled manually, or may be an automated instrument. For example: and a channel simulator.
Referring to fig. 4 and 5, the topological relation between the external signal control unit and the antenna unit is: the output channel of each external signal controller in the external signal control units is connected with one antenna in the antenna units through a radio frequency line. In order to avoid excessive signal loss, the connection relationship between the external signal controller unit and the base station unit and the connection relationship between the antenna unit and the external signal controller unit need to satisfy specific conditions, that is, the working frequency band of the base station is adapted to the working frequency range of the antenna.
As a preferable scheme, the terminal test system further comprises a shielding room 16/shielding box, and the antenna unit and the tested equipment are arranged in the shielding room/shielding box and used for isolating the tested equipment and the antenna unit from external wireless communication signals and eliminating external random and uncontrollable wireless communication signal interference, so that test data of the terminal test system are more stable and controllable, and the effectiveness of the terminal test system is ensured.
The present invention also provides an electronic device including: the terminal test system comprises a processor, a display and a memory storing a computer program, wherein the processor executes information interaction control, information storage and the like of the program on the memory to the terminal test system. The processor and the memory are connected through a bus or an interface. The electronic device may be the network management unit.
Finally, it is noted that the above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and that although the present invention has been described with reference to the preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein. Obvious changes that are extended by the technical proposal of the invention are still within the scope of the invention.
Claims (7)
1. A vehicle-mounted mobile communication terminal test system, characterized by comprising:
the core network unit is used for providing connection of the tested equipment, management of the tested equipment and carrying out service completion, and is used as an interface for providing a carrying network to an external network;
the base station unit is used for receiving the digital signal of the core network unit and converting the digital signal into a radio frequency signal, transmitting the radio frequency signal to the external signal controller unit in a downlink manner, receiving the radio frequency signal of the external signal controller unit and converting the radio frequency signal into a digital signal, and transmitting the digital signal to the core network unit in an uplink manner;
the external signal controller unit is used for receiving the signals of the base station unit and carrying out signal conversion, and transmitting the signals to the antenna unit in a downlink manner so as to simulate the multipath effect and Doppler effect of the urban environment;
a network management unit for coordinating and/or adjusting the behavior of base station units in the network;
the antenna unit is used for transmitting the downlink signal of the external signal controller unit to the space environment where the tested equipment is located, receiving the uplink signal of the tested equipment and transmitting the uplink signal to the external signal controller unit;
and the shielding room is used for isolating the tested equipment and the antenna unit from external wireless communication signals and preventing the test result from being influenced by random unknown signals.
2. The system according to claim 1, wherein the network management unit issues the coordination and/or adjustment instruction for the base station unit via the core network unit.
3. A vehicle mobile communication terminal test system according to claim 2, wherein one or more network management units are connected to the base station unit via a network cable or bus to perform configuration management on the base station unit.
4. The vehicle mobile communication terminal test system according to claim 1, wherein the core network unit comprises one or more of a 5G core network, a 4G core network, a 3G core network, and a 2G core network.
5. The system according to claim 1, wherein the base station unit comprises one or more of a 5G base station, a 4G base station, a 3G base station, and a 2G base station.
6. The vehicle-mounted mobile communication terminal test system according to claim 1, wherein the external signal controller unit is an attenuator or a channel simulator.
7. An electronic device, comprising: a processor, a display and a memory storing a computer program, wherein the processor executes information interaction control and information storage of the program on the memory to the terminal test system according to claim 1.
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| CN114793346A (en) * | 2022-04-29 | 2022-07-26 | 中国汽车工程研究院股份有限公司 | Whole vehicle networking NV-IOT test system and method in anechoic chamber |
| CN114866449B (en) * | 2022-04-29 | 2023-06-06 | 重庆长安汽车股份有限公司 | Whole vehicle wireless communication test system and test method thereof |
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