CN104053177A - Test device and method for interoperability between network equipment and mobile terminal - Google Patents

Abstract

The invention provides a test apparatus and method for mutual operation of a network device and a mobile terminal. A radio frequency switch matrix is used for receiving radio frequency signals issued by a multipath network device and parameter information of a test-participated mobile terminal; a controller is used for, according to the parameter information of the test-participated mobile terminal, controlling the radio frequency switch matrix to select a target test-participated mobile terminal matching the parameter information and calculating a controls script used by an attenuator and a channel simulation instrument; the attenuator is used for, according to the control script calculated by the controller, processing multiple radio frequency signals received by the radio frequency switch matrix and obtaining multiple attenuation processing results; and the channel simulation instrument is used for adding rapid attenuation channel influences to the attenuation processing results and combining to form a path of signals for sending to the target test-participated mobile terminal. The scheme provided by the invention can realize interference and coexistence testing of multiple network standards.

Description

Test device and method for interoperability between network equipment and mobile terminal

technical field

The invention relates to the communication field, in particular to a test device and method for interoperability between network equipment and mobile terminals.

Background technique

In order to test the interconnection function and service performance of mobile terminals and network equipment, operators need to build a test environment in the laboratory and field to verify whether the terminal can perform normal basic services under the current network configuration based on the equipment conditions of the live network before the terminal goes on the market. (such as voice calls, downloads, web browsing, SMS, MMS, video calls, etc.), whether the basic communication functions (access registration, switching, reselection, paging) can be performed normally, and whether the expected performance indicators (such as uploading download rate, power consumption, etc.).

Existing laboratory tests for interoperability between mobile terminals and networks require the use of real network elements to build equipment environments from multiple manufacturers. Testers manually conduct service dial-up tests, manually control network signals and instrument operations, and manually count and judge results. This testing is time consuming and generally not highly automated. Moreover, for the coexistence of 2G/3G/4G/WLAN networks in the future and the joint networking of multi-vendor equipment, this test will be more complicated. Due to the different standards supported by each terminal, it is necessary to test various network standards and interoperability items between the standards, and also need to be tested in different hardware and software versions of multiple manufacturers. The test environment itself is a complex task. Work. In addition, terminal operations are mainly performed manually by testers, and the test speed is very low.

In the technical solutions of existing testing methods, there is no testing system that can integrate equipment of multiple standards and manufacturers to automatically perform dial-up testing of basic communication functions and services of terminals. Moreover, automated testing can be realized for test items that do not require the participation of complex human movements, and the results of all tests can be automatically counted and analyzed.

The air interface channel environment required for wireless testing is also very important in testing. At present, general channel simulation solutions require the development of special baseband processing devices to process signals, and most of them are simulated for the downlink. Traditional channel emulators are mostly used to simulate the influence of multipath channels, that is, small-scale fading. For large-scale (shadow and path loss), the dynamic range of signal changes is insufficient (the dynamic adjustment range of general instruments is only 30 to 50db, and is Contains large-scale and small-scale overlay effects, and moving scenes often have a larger range of changes).

In addition, since multi-standard and multi-version devices jointly build a test system, the selection and control of signal sources is very difficult and the degree of automation is not high. Generally, it is considered that a radio frequency switch matrix can be used to switch signals.

The existing technical solutions have some deficiencies in network environment establishment, test execution, and result analysis and statistics. The shortcomings are as follows:

Existing testing methods lack solutions in the following areas, manifested by:

Multi-vendor and multi-system systems have low integration, and it is difficult to carry out compatibility and interoperability tests between terminals and networks. The network environment is completely provided by real equipment and network elements, such as the mixed test of 2/3/4G/Wlan systems among multiple manufacturers, the work of building and controlling the network environment is very complicated;

Most of the business is manually dialed and tested, and the control and management of the test auxiliary instrument and equipment monitoring system are separated, the degree of automation is low, and a large number of human operations are required. Since network equipment vendors and instrument vendors provide their own equipment and instruments, it is necessary to manually control each discrete part of the entire test environment, so that network equipment and instruments can work together to form a test environment;

Test result statistics and judgments need to be done manually by testers. Since part of the measurement values and signaling messages used to judge the test results are taken from the instrument and equipment monitoring system, it is necessary to manually derive data for judgment. (If the test target is the user's experience and feelings, or the test object is the operation of the application software, it is not within the scope of the terminal and network interoperability test)

For channel simulation, it is necessary to develop a dedicated baseband processing device or use a dedicated channel emulator. The disadvantage is that the cost of self-developed processing devices is relatively high. Although some special functions can be realized, there is no special requirement for terminal and network compatibility and interoperability testing (this test verifies whether network equipment and terminals have unified functions and performances. Performance). Dedicated channel simulation instruments are mostly used to simulate the small-scale fast fading of multi-path channels, and cannot be simulated for scenes with a large range of signal strength changes;

For multi-standard equipment, the RF switch matrix can be used for signal selection, but the simple selection can only realize the presence or absence of the signal, and cannot perform special control on the signal, and cannot achieve the purpose of coexisting and controllable multi-standard. In the scenario where the network and other network interference coexist, a dedicated RF processing matrix needs to be specially developed.

Contents of the invention

The technical problem to be solved by the present invention is to provide a test device and method for interoperability between network equipment and mobile terminals, which can realize interference and coexistence tests of multiple network standards, automatically perform interoperability tests between terminals and networks, and improve test automation.

In order to solve the above technical problems, embodiments of the present invention provide a test device for interoperability between network equipment and mobile terminals, including:

A radio frequency switch matrix, an attenuator connected to the radio frequency switch matrix, a channel emulation instrument connected to the attenuator, and a controller connected to the radio frequency switch matrix, the attenuator and the channel emulation instrument respectively; in,

The radio frequency switch matrix is used to receive radio frequency signals issued by multi-channel network equipment and parameter information of the mobile terminal;

The controller is configured to control the radio frequency switch matrix to select a target mobile terminal for measurement that matches the parameter information according to the parameter information of the mobile terminal for measurement, and calculate the attenuator and the channel emulation The control script used by the instrument;

The attenuator is configured to process multiple radio frequency signals received from the radio frequency switch matrix according to the control script calculated by the controller, to obtain multiple attenuation processing results;

The channel emulation instrument is used to add fast-fading channel effects to the attenuation processing results, combine them into one signal, and send it to the target reference mobile terminal.

Wherein, the parameter information of the mobile terminal to be tested includes: manufacturer information, system information and version information of the mobile terminal to be tested;

The controller is specifically configured to generate a logic circuit control instruction according to the manufacturer information, system information, and version information of the mobile terminal to be tested, and control the selection of the radio frequency switch matrix and the The same target as the mobile terminal is used to test the mobile terminal;

and used for calculating the first control script used by the attenuator and the second control script used by the channel emulation instrument.

Wherein, when the controller calculates the first control script used by the attenuator, it is specifically used to:

Set the initial value of the attenuation value of the attenuator;

Set the sampling time granularity of the moving speed of the reference mobile terminal and large-scale fading, and calculate the variation of the radio frequency signal according to the propagation formula.

Wherein, the initial value of the attenuation value of the attenuator is 0 or the path loss value at D-d1, where D is the distance between stations, and d1 is the exit point d1 of the serving base station where the mobile terminal is located.

Wherein, when the controller calculates the variation of the radio frequency signal amplitude according to the propagation formula, it is specifically used for:

Sampling once every Ts, the moving speed of the mobile terminal is V, then the moving distance within Ts is L=V×Ts;

Calculate the variation of the radio frequency signal according to the path loss function: PL=F(L), where PL is the path loss within the moving distance L, that is, the most important large-scale fading, and the F function is a value consisting of logarithms, constants, etc. composed functions;

Give the programmable attenuator the increase or decrease value required by the variation of the radio frequency signal.

Wherein, the controller is also used to generate random shadow fading according to the variance and mean value of shadow fading before assigning the increase or decrease value required by the variation of the radio frequency signal to the programmable attenuator; The above path loss is superimposed to form the variation of the radio frequency signal that conforms to the actual propagation environment.

Wherein, the radio frequency switch matrix is a layered structure, including:

The first layer includes a plurality of radio frequency channels of the first layer, and a version switch connected to the radio frequency channels of the first layer in one-to-one correspondence;

The second layer includes a plurality of radio frequency channels of the second layer, and a standard switch connected to the plurality of radio frequency channels of the second layer in one-to-one correspondence;

The third layer includes multiple radio frequency channels on the third layer and factory switches that are connected to the multiple radio frequency channels on the third layer in one-to-one correspondence;

The fourth layer includes N output ports;

Wherein, the version switch of the first layer is connected with the standard switch of the second layer, the standard switch of the second layer is connected with the manufacturer switch of the third layer, and the manufacturer switch of the third layer is connected with the output port . .

Wherein, the attenuator is a programmable attenuator, and has N channel input ports, which are connected to the N output ports of the radio frequency switch matrix in one-to-one correspondence; the N is greater than or equal to 2.

Embodiments of the present invention also provide a test method for interoperability between a network device and a mobile terminal, which is applied to a radio frequency switch matrix, an attenuator connected to the radio frequency switch matrix, a channel emulation instrument connected to the attenuator, and A device for a controller connected to the radio frequency switch matrix, the attenuator and the channel emulation instrument respectively, the method comprising:

The radio frequency switch matrix of the device receives the radio frequency signals issued by the multi-channel network equipment and the parameter information of the mobile terminal for reference;

The controller of the device controls the radio frequency switch matrix to select a target mobile terminal for measurement that matches the parameter information according to the parameter information of the mobile terminal for measurement, and calculates the attenuator and the channel emulation instrument the control script used;

The attenuator of the device processes the multiple radio frequency signals received from the radio frequency switch matrix according to the control script calculated by the controller, and obtains multiple attenuation processing results;

The channel emulation instrument of the device adds the influence of the fast-fading channel to the attenuation processing result, combines them into one signal, and sends it to the target reference mobile terminal.

Wherein, the parameter information of the mobile terminal to be tested includes: manufacturer information, system information and version information of the mobile terminal to be tested;

According to the parameter information of the test mobile terminal, control the radio frequency switch matrix to select a target test mobile terminal that matches the parameter information, and calculate the control script used by the attenuator and the channel emulation instrument The steps specifically include:

Generate a logic circuit control instruction according to the manufacturer information, system information, and version information of the mobile terminal under test, and control the radio frequency switch matrix to select a target parameter consistent with the mobile terminal under test according to the logic circuit control command. test mobile terminal;

A first control script used by the attenuator and a second control script used by the channel emulation meter are calculated.

Wherein, the step of calculating the first control script used by the attenuator includes:

Set the initial value of the attenuation value of the attenuator;

Set the sampling time granularity of the moving speed of the reference mobile terminal and large-scale fading, and calculate the variation of the radio frequency signal according to the propagation formula.

Wherein, the initial value of the attenuation value of the attenuator is 0 or the path loss value at D-d1, where D is the distance between stations, and d1 is the exit point d1 of the serving base station where the mobile terminal is located.

Wherein, according to the propagation formula, the steps of calculating the variation of the radio frequency signal include:

Sampling once every Ts, the moving speed of the mobile terminal is V, then the moving distance within Ts is L=V×Ts;

According to the path loss function: PL=F(L), the variation of the radio frequency signal is calculated, wherein PL is the path loss, that is, the most important large-scale fading, and the F function is a function composed of logarithms, constants and other values;

Give the programmable attenuator the increase or decrease value required by the variation of the radio frequency signal.

Among them, before assigning the increase and decrease values required by the variation of the radio frequency signal to the programmable attenuator, it also includes:

Generate random shadow fading according to the variance and mean of shadow fading;

The random shadow fading and the path loss are superimposed to form a variation of the radio frequency signal conforming to the actual propagation environment.

The beneficial effects of above-mentioned technical scheme of the present invention are as follows:

The test device and method described in the above scheme use the radio frequency switch matrix to complete the management and signal selection of the interoperability test network side equipment. Not only can a specific test network be selected, but also the radio frequency switch matrix and adjustable attenuator can be used to realize the interference of multi-network standards , Coexistence test. As the source of interference, the strength of the network signal can be freely programmed and adjusted to match the signal strength of the service network to simulate various complex wireless interference scenarios.

Description of drawings

Fig. 1 is a schematic structural diagram of a test device for interoperability between network equipment and mobile terminals of the present invention;

Fig. 2 is the structural representation of the radio frequency switch matrix of device shown in Fig. 1;

FIG. 3 is a schematic diagram of a specific application scenario of a test device for interoperability between a network device and a mobile terminal according to the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

As shown in Fig. 1, a kind of test device 12 of network equipment and mobile terminal interoperability comprises: radio frequency switch matrix, the attenuator that is connected with described radio frequency switch matrix, the channel emulation instrument that is connected with described attenuator, and respectively A controller (which may be a PC) connected to the radio frequency switch matrix, the attenuator and the channel emulation instrument; wherein, the controller communicates with the radio frequency switch matrix, the attenuator, and the channel emulation instrument through an Ethernet line, a synchronization line, etc. Connect, according to the test purpose, control the wireless network signals of different formats and different manufacturers; the radio frequency signal is transmitted between the radio frequency transmitting end of the network equipment, the attenuator, and the channel emulation instrument; the device 12 specifically includes:

The radio frequency switch matrix is used to receive radio frequency signals issued by multiple network devices and to measure parameter information of mobile terminals; wherein, the network devices are network devices on the base station side, or monitoring devices on the network side; as shown in the figure 1, the network side 11 includes: a first controller, network equipment or monitoring equipment (may also be an instrument) and a base station sending end, the first controller is connected to the network equipment and monitoring equipment through an optical fiber, an Ethernet line, and a synchronization line, according to The test purpose selects the corresponding network standard and device parameters for configuration, and the first controller sends the device parameter file including the parameter information of the mobile terminal to be tested to the base station sending end through the network device or monitoring device, and the base station sending end sends To the test device 12 described in this embodiment of the present invention; at the same time, the base station transmitting end also has a plurality of radio frequency transmitting ends, and the radio frequency signal is sent to the test device 12 described in this embodiment of the present invention;

The controller (that is, the second controller in FIG. 1 ) is configured to control the radio frequency switch matrix to select a target mobile terminal for measurement that matches the parameter information according to the parameter information of the mobile terminal for measurement, And calculate the control script used by the attenuator and the channel emulation instrument;

The attenuator is configured to process multiple radio frequency signals received from the radio frequency switch matrix according to the control script calculated by the controller, to obtain multiple attenuation processing results;

The channel emulation instrument is used to add fast-fading channel effects to the attenuation processing results, combine them into one signal, and send it to the target reference mobile terminal.

In this embodiment of the present invention, the signal strength and channel environment of each manufacturer and each standard network are directly adjusted. The use of the RF switch matrix enables the system to easily choose among signals of various standards, build a test environment where multiple networks coexist, and can simultaneously access equipment from different manufacturers to facilitate interoperability testing. Attenuators can control signal strength to create special communication function test scenarios.

The channel emulation instrument is different from the general channel emulation instrument connection mode. The channel emulation instrument in this embodiment is not directly connected to the antenna port of each radio frequency transmission device (base station RRU port/AP radio frequency output port), but directly connects each The network signals of the manufacturer and each standard are combined into one after RF switching and attenuation processing, and connected to the shielding box containing the test terminal, and the multipath effect and attenuation value are directly added to the transmitted signals of each channel. Avoiding the use of a large number of expensive channel attenuators, for the spatial multiplexing working mode of the multi-antenna MIMO system, it is still possible to keep multiple streams transmitted at the same time, and control the signal quality by adjusting the signal strength and interference/noise strength.

In the above embodiment, the parameter information of the mobile terminal to be tested includes: manufacturer information, system information and version information of the mobile terminal to be tested;

The controller is specifically configured to generate a logic circuit control instruction according to the manufacturer information, system information, and version information of the mobile terminal to be tested, and control the selection of the radio frequency switch matrix and the The same target as the mobile terminal is used to test the mobile terminal;

and used for calculating the first control script used by the attenuator and the second control script used by the channel emulation instrument.

Wherein, when the controller calculates the first control script used by the attenuator, it is specifically used to:

Set the initial value of the attenuation value of the attenuator;

Set the sampling time granularity of the moving speed of the reference mobile terminal and large-scale fading, and calculate the variation of the radio frequency signal according to the propagation formula.

Wherein, the initial value of the attenuation value of the attenuator is 0 or the path loss value at D-d1, where D is the distance between stations, and d1 is the exit point d1 of the serving base station where the mobile terminal is located.

Wherein, when the controller calculates the variation of the radio frequency signal amplitude according to the propagation formula, it is specifically used for:

Sampling once every Ts, the moving speed of the mobile terminal is V, then the moving distance within Ts is L=V×Ts;

According to the path loss function: PL=F(L), calculate the variation of the radio frequency signal, where PL is the path loss within the moving distance L, that is, the most important large-scale fading, and the F function is a logarithm, constant, etc. Functions composed of numeric values;

Give the programmable attenuator the increase or decrease value required by the variation of the radio frequency signal.

Wherein, the controller is also used to generate random shadow fading according to the variance and mean value of shadow fading before assigning the increase or decrease value required by the variation of the radio frequency signal to the programmable attenuator; The above path loss is superimposed to form the variation of the radio frequency signal that conforms to the actual propagation environment.

The specific implementation process is as follows:

All calculations are done in the second controller and scripted down to the programmable attenuator:

1) The attenuation value of the programmable attenuator is initially set to 0;

2) Select the propagation environment model and abstract it into a formula or sample value; this model can come from the classical propagation model, or from the actual CW wave measurement data of the live network;

Set the terminal moving speed and the time granularity of large-scale fading sampling (sampling every Ts, the speed is V, then the moving distance L=V×T), and calculate the signal amplitude change according to the propagation formula or sample value. The amplitude change is generally expressed as a logarithmic function of the moving distance, that is, the path loss function;

PL=F(L), where PL is the path loss within the moving distance L, that is, the most important large-scale fading; the F function is a function composed of logarithms, constants and other values, and has different values according to different wireless scenarios value.

Further, random shadow fading is generated according to the variance and mean of shadow fading. Random shadow is another component of large-scale fading. After superimposed with path loss, a large-scale fading model that is more in line with the actual propagation environment is formed;

Assign the increase and decrease values required for signal changes to the programmable attenuator; among them, the programmable attenuator is configured with at least 2 channels, which can independently control two or more signals; to simulate the switching scene between two 2.6Ghz base stations as For example, time granularity = 100ms, the wireless environment is a conventional ETU channel, and the moving speed is 30km/H. Then the distance changes every 100ms to 0.83m. If the path loss is calculated according to the COST231Walfish-Ikegami model formula, the formula is as follows:

PL=-55.9+38×log(d)+(24.5+1.5×fc/925)×log(fc).

Here, the sampling granularity can be in the time domain or in the spatial domain. For example, a value is sampled every 10m at the spatial granularity, and the time interval is the ratio of 10m to the speed.

The transmit power and frequency of the base station are fixed and known, and the equivalent starting distance d1 can be calculated from the signal strength when the attenuation value of the programmable attenuator is 0 (which can be easily measured from a frequency sweep instrument or a spectrum analyzer) .

The radio frequency link brings a certain loss due to the connection and line loss. This loss value is a fixed value, which can be equivalently regarded as a part of the path loss caused by the distance from the starting point to the base station;

The terminal starts from point d1 under the serving base station, switches to the target cell at the agreed speed above, and changes the path loss and shadow of the serving cell every 100ms until the switching is completed. The signal of the serving cell decreases gradually, and the amplitude of each decrease can be obtained by iterative calculation of the formula. The signal of the target cell increases gradually. When the test requirements are not strict, if you only examine the low-to-medium speed mobile scene, you don’t need to do strict calculations. If you want to accurately simulate a certain station distance D condition, you need to set the adjustable attenuator to make the target cell The signal strength is equal to the value of the path loss at D-d1 (or the controller calculates the angle and distance according to the network topology) (the path loss can be very large at this time, and the signal strength is weak), and then increase iteratively until the handover is completed.

Since the dynamic range of the programmable attenuator is larger than that of the traditional channel simulator (up to 127db or even larger, the channel simulator only has a dynamic range of 30-50db), it can easily simulate the scene of occlusion and long-distance loss. In the above embodiments of the present invention, the control of the programmable attenuator, combined with the simulation of the terminal speed, is closer to the complex mobile scenes in the actual network, such as far away from the base station, close to the base station, and combination of static and motion.

Wherein, in the above-mentioned embodiment of the present invention, as shown in Figure 2, the radio frequency switch matrix is a layered structure, including:

The first layer includes a plurality of radio frequency channels of the first layer, and a version switch connected to the radio frequency channels of the first layer in one-to-one correspondence;

The second layer includes a plurality of radio frequency channels of the second layer, and a standard switch connected to the plurality of radio frequency channels of the second layer in one-to-one correspondence;

The third layer includes multiple radio frequency channels on the third layer and factory switches that are connected to the multiple radio frequency channels on the third layer in one-to-one correspondence;

The fourth layer includes N output ports;

Wherein, the version switch of the first layer is connected with the standard switch of the second layer, the standard switch of the second layer is connected with the manufacturer switch of the third layer, and the manufacturer switch of the third layer is connected with the output port . .

Wherein, the attenuator is a programmable attenuator, and has N channel input ports, which are connected to the N output ports of the radio frequency switch matrix in one-to-one correspondence; the N is greater than or equal to 2. Can realize the mapping relationship from any port input to any port output

Each layer represents a screening keyword, which is identified by enumerated variables in the control script. The keywords include "manufacturer", "standard", "version/model", "base station/AP number", etc., and each keyword has A variety of enumerated variables as possible options;

When the radio frequency signal is selected, each layer receives the enumeration variable sent by the controller-2. For example, the switch on the "manufacturer" layer points to manufacturer A, the "standard" switch points to the TD-LTE standard, the "version" switch points to the R9 version, and the "base station number" points to #1 to complete the selection of a signal. As shown in Figure 2, each radio frequency signal channel of each layer is connected to the upper layer and the lower layer with single-pole multi-throw radio frequency switches; after the numerous radio frequency switches of the radio frequency switch matrix are connected to the signal sending ports of the network equipment, The equipment required for the test is configured by the first controller, and the equipment irrelevant to the test is shut down or placed in an idle state. At the same time, the first controller sends the information of the test equipment to the second controller via the Ethernet port, such as manufacturer, standard, version, or more detailed frequency band, power, bandwidth, etc. The second controller uses the information of the test equipment sent by the first controller, connects to each switch through some interface circuit (such as I2C, com, etc.), issues logic circuit control instructions, and selects the direction of single-pole multi-throw, so that Control the entire radio frequency matrix to select a target device that is consistent with the device parameters of the mobile terminal under test issued by the first controller. At the same time, the second controller uses the device parameter information issued by the first controller to calculate and control scripts and control programs used by the programmable attenuator and the channel emulator;

Corresponding to the adjustable attenuator for simulating large-scale fading, the attenuator needs to support at least two channels of input signals, so the RF switch matrix needs the same number of outputs, and each output can be independently controlled and selected. The multi-channel output can be the signal of the same manufacturer or the signal of different manufacturers, which is convenient for interoperability testing of different manufacturers; and the RF switch matrix can not only choose the test network, but also choose to interfere with network signals to create interference coexistence scenarios.

Since the number of channels of the RF switching matrix and the programmable attenuator are the same, in order to save space, design the input and output impedance characteristics, and avoid interference, the two parts can be jointly designed and integrated into one RF component.

In the above-mentioned embodiments of the present invention, the mobile terminal side 13 includes: a third controller and a script file to control the terminal under test to automatically perform service dial-up testing. Download the script file to the terminal under test through the data cable, or issue the commands in the script to the terminal under test through SMS, AT commands, etc. In this way, the automatic start and stop of the test process and the automatic dialing test of services (services include voice calling or called, downloading, web browsing, video calls and other types of services) are realized.

.

Figure 3 is a concrete example of system composition. Cell structure of the radio access network Taking the TD-LTE system as an example, the base station eNB includes a baseband processing part BBU and an RRU unit. In addition to base stations, 2/3G cells also include network elements (BSC, RNC) such as base station control and radio network controllers. The controller is 3 independent PCs. The actual system can use one or more PCs or servers as controllers according to conditions, and the equipment, environment, and terminal control functions can be undertaken by the same physical device or by multiple physical devices.

1) The network environment configuration operation in the pre-configuration process is a one-time process before the start of the test, involving the selection of network equipment (version, manufacturer, system, quantity), setting of signal strength (fixed strength or variable strength), Selection of multipath channels. Since the network environment may require a combination of the above options, the traditional method requires a huge amount of operations. In the embodiment of the present invention, the controller can be used to perform multiple repeated configurations using scripts, and the programmable attenuator and radio frequency switch matrix can be used to flexibly combine network signals under various conditions, avoiding artificial wiring, rerouting, and branching , merge and other operations. The above configurations are all done by automation. Script control simulates large-scale fading to create mobile scenes with UE mobile speed and network topology characteristics, script control instruments to complete small-scale fast fading simulation, and RF switch matrix to complete signal selection.

2) The network device configuration in the pre-configuration process is also a one-time process. In step 1) under the selected combined network environment, the parameters of the selected devices are configured and solidified. The controller is connected to the network management and maintenance system of the network device, and the parameters required by the test case are imported into the device using a script, and kept unchanged as much as possible during the test (unless the test needs to be performed under different network parameters) to maintain the test system of stability.

3) Terminal configuration in the pre-configuration process is a key step to realize rapid automation of interoperability testing. Since the dialing of traditional services needs to be initiated and terminated manually, the test efficiency is greatly affected. The method adopted by the embodiment of the present invention is to automatically initiate a test task by using a load-in script or directly sending a test command. The way of running after loading the script is not suitable for evaluating the test items of terminal power consumption because of the need to increase the overhead of script running, but it is applicable to other items that will not introduce changes in terminal performance (such as connection mode conversion, voice function, video Basic services such as calls, web access, and downloads, as well as basic communication functions such as switching and reselection).

4) After the test starts, since the test network equipment has been stabilized, the test environment is automatically controlled by the program, and the start and end of the business are taken over by instructions or scripts, which greatly reduces the preparation work required for human intervention and adjustment of the environment. Interoperability testing can be done quickly. And improve the reliability and comparability of the test.

5) At the end of the test, the terminal behavior will be saved in the monitoring equipment (instrument), and the test result can be automatically judged according to the test evaluation target.

6) In the test pre-configuration stage, use automated means to build the network environment, including equipment selection and combination and wireless network strength adjustment, to improve the efficiency of network environment construction. Use adjustable attenuators to simulate large-scale fading, with UE moving speed and network topology characteristics; RF matrix can select test network and interference network signals, combined with large-scale analog adjustable attenuators, simulate interference coexistence scenarios. Sacrifice part of the space characteristics, and use a single set of instruments (shared by all network signals) to realize the simulation of multipath channels;

7) In the test execution stage, the automatic dial test method is used instead of manual operation to improve test efficiency and repeatability.

Compared with the prior art, the technical solution proposed by this application has the following advantages:

In the existing technical solution, limited by multi-system, model version, and manufacturer source factors, the terminal interoperability test has the disadvantages of time-consuming and unstable environment. The test system mentioned in this case can use automation to improve test efficiency, and because automation control reduces human intervention, it can improve environmental stability and repeatable combination and configuration capabilities;

The service of the terminal under test in the existing technical solution is artificially dialed, and the efficiency is low. The embodiment of the present invention adopts the automatic dial test method instead of manual operation, and improves the speed of interoperability test;

Embodiments of the present invention use programmable attenuators and channel emulation instruments to simulate wireless channels. The programmable attenuator runs automatically through a specific script, which can simulate the scene where the UE moves between two real base stations, with speed characteristics, and can realistically simulate moving scenes such as moving away from the serving cell, approaching the target cell, turning, and stationary . No need for baseband processing, wide range of signal changes, simple and easy to operate;

The embodiment of the present invention uses the radio frequency switch matrix to complete the management and signal selection of the interoperability test network side equipment, not only can select a specific test network, but also can use the radio frequency switch matrix and adjustable attenuator to realize the interference and coexistence test of multi-network standards . As the source of interference, the strength of the network signal can be freely programmed and adjusted to match the signal strength of the service network to simulate various complex wireless interference scenarios;

Corresponding to the above device, an embodiment of the present invention also provides a test method for interoperability between network equipment and mobile terminals, which is applied to a radio frequency switch matrix, an attenuator connected to the radio frequency switch matrix, and the attenuator The connected channel emulation instrument, and the device of the controller connected with the radio frequency switch matrix, the attenuator and the channel emulation instrument respectively, the method includes:

The radio frequency switch matrix of the device receives the radio frequency signals issued by the multi-channel network equipment and the parameter information of the mobile terminal for reference;

The controller of the device controls the radio frequency switch matrix to select a target mobile terminal for measurement that matches the parameter information according to the parameter information of the mobile terminal for measurement, and calculates the attenuator and the channel emulation instrument the control script used;

The attenuator of the device processes the multiple radio frequency signals received from the radio frequency switch matrix according to the control script calculated by the controller, and obtains multiple attenuation processing results;

The channel emulation instrument of the device adds the influence of the fast-fading channel to the attenuation processing result, combines them into one signal, and sends it to the target reference mobile terminal.

Wherein, the parameter information of the mobile terminal to be tested includes: manufacturer information, system information and version information of the mobile terminal to be tested;

According to the parameter information of the test mobile terminal, control the radio frequency switch matrix to select a target test mobile terminal that matches the parameter information, and calculate the control script used by the attenuator and the channel emulation instrument The steps specifically include:

Generate a logic circuit control instruction according to the manufacturer information, system information, and version information of the mobile terminal under test, and control the radio frequency switch matrix to select a target parameter consistent with the mobile terminal under test according to the logic circuit control command. test mobile terminal;

A first control script used by the attenuator and a second control script used by the channel emulation meter are calculated.

Wherein, the step of calculating the first control script used by the attenuator includes:

Set the initial value of the attenuation value of the attenuator;

Set the sampling time granularity of the moving speed of the reference mobile terminal and large-scale fading, and calculate the variation of the radio frequency signal according to the propagation formula.

Wherein, the initial value of the attenuation value of the attenuator is 0 or the path loss value at D-d1, where D is the distance between stations, and d1 is the exit point d1 of the serving base station where the mobile terminal is located.

Wherein, according to the propagation formula, the steps of calculating the variation of the radio frequency signal include:

Sampling once every Ts, the moving speed of the mobile terminal is V, then the moving distance within Ts is L=V×Ts;

Calculate the variation of the radio frequency signal according to the path loss function: PL=F(L), where PL is the path loss within the moving distance L, that is, the most important large-scale fading, and the F function is a value consisting of logarithms, constants, etc. composed functions;

Give the programmable attenuator the increase or decrease value required by the variation of the radio frequency signal.

Among them, before assigning the increase and decrease values required by the variation of the radio frequency signal to the programmable attenuator, it also includes:

Generate random shadow fading according to the variance and mean of shadow fading;

The random shadow fading and the path loss are superimposed to form a variation of the radio frequency signal conforming to the actual propagation environment.

All the implementation modes in the above-mentioned device embodiments of the present invention are applicable to the method embodiment, and can also achieve the same technical effect, that is, a test system that can automatically test the interoperability between the terminal and the network. At the same time, the system can automatically count and judge the test results. This system can greatly reduce the difficulty of setting up a multi-vendor and multi-standard test network environment, improve the degree of test automation, reduce human intervention and time and labor costs; for mobile scenarios, the test system of the embodiment of the present invention can simulate large-scale (including path loss and shadowing), small-scale fading. And it can simulate wireless scenarios such as far away from the base station, close to the base station, stationary and moving alternately at a certain moving speed. For multi-system coexistence scenarios, it can simulate constant interference intensity, variable interference intensity, and interference changes triggered by specific events, which is suitable for evaluating terminal and network performance under various complex networking conditions.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (14)

1. A network equipment and mobile terminal interoperation testing device is characterized by comprising:

the system comprises a radio frequency switch matrix, an attenuator connected with the radio frequency switch matrix, a channel simulation instrument connected with the attenuator, and a controller respectively connected with the radio frequency switch matrix, the attenuator and the channel simulation instrument; wherein,

the radio frequency switch matrix is used for receiving radio frequency signals issued by the multi-path network equipment and parameter information of the reference mobile terminal;

the controller is used for controlling the radio frequency switch matrix to select a target reference mobile terminal matched with the parameter information according to the parameter information of the reference mobile terminal, and calculating a control script used by the attenuator and the channel simulation instrument;

the attenuator is used for processing a plurality of radio frequency signals received from the radio frequency switch matrix according to the control script calculated by the controller to obtain a plurality of attenuation processing results;

and the channel simulation instrument is used for adding fast attenuation channel influence to the attenuation processing result, combining the signals into a signal and sending the signal to the target reference mobile terminal.

2. The apparatus according to claim 1, wherein the parameter information of the mobile terminal is measured by: the method comprises the steps of measuring manufacturer information, system information and version information of the mobile terminal;

the controller is specifically used for generating a logic circuit control instruction according to the manufacturer information, the system information and the version information of the reference mobile terminal, and controlling the radio frequency switch matrix to select a target reference mobile terminal consistent with the reference mobile terminal according to the logic circuit control instruction;

and for calculating a first control script for use by the attenuator and a second control script for use by the channel simulation meter.

3. The network device and mobile terminal interoperation test apparatus according to claim 2, wherein the controller, when calculating the first control script used by the attenuator, is specifically configured to,

setting an attenuation value initial value of the attenuator;

and setting the moving speed of the reference mobile terminal and the sampling time granularity of large-scale fading, and calculating the variable quantity of the radio frequency signal according to a propagation formula.

4. The apparatus for testing interoperability of a network device and a mobile terminal according to claim 3, wherein the initial value of the attenuation value of the attenuator is 0 or a path loss value at D-D1, where D is an inter-site distance and D1 is a departure point D1 of a serving base station where the mobile terminal is located.

5. The device according to claim 3, wherein the controller is specifically configured to, when calculating the variation of the amplitude of the radio frequency signal according to a propagation formula:

sampling every Ts once, wherein the moving speed of the mobile terminal is V, and the moving distance L = V multiplied by Ts within the time of Ts;

according to the path loss function: PL = F (L) calculating the variation of the rf signal, where PL is the path loss within the moving distance L, i.e. the most dominant large-scale fading, and F is a function of logarithm, constant, etc.;

and giving the increment and decrement values required by the variation of the radio frequency signal to the programmable attenuator.

6. The network device and mobile terminal interoperation test apparatus according to claim 5, wherein the controller is further configured to generate random shadow fading according to a variance and a mean of the shadow fading before applying an increment and decrement value required for a variation of the radio frequency signal to the programmable attenuator; and superposing the random shadow fading and the path loss to form the variable quantity of the radio frequency signal which accords with the actual propagation environment.

7. The apparatus for testing interoperation of a network device and a mobile terminal according to claim 1, wherein the radio frequency switch matrix has a layered structure comprising:

the system comprises a first layer and a second layer, wherein the first layer comprises a plurality of radio frequency channels of the first layer and version switches which are connected with the radio frequency channels of the first layer in a one-to-one correspondence mode;

the second layer comprises a plurality of radio frequency channels of the second layer and standard switches which are connected with the radio frequency channels of the second layer in a one-to-one correspondence manner;

the third layer comprises a plurality of radio frequency channels of the third layer and factory switches which are connected with the radio frequency channels of the third layer in a one-to-one correspondence manner;

a fourth layer comprising N output ports;

the version switch of the first layer is connected with the standard switch of the second layer, the standard switch of the second layer is connected with the factory switch of the third layer, and the factory switch of the third layer is connected with the output port.

8. The device for testing the interoperability of a network device and a mobile terminal according to claim 7, wherein the attenuator is a programmable attenuator and has N channel input ports connected to N output ports of the rf switch matrix in a one-to-one correspondence; the N is greater than or equal to 2.

9. A testing method for interoperation of network equipment and a mobile terminal is applied to a device comprising a radio frequency switch matrix, an attenuator connected with the radio frequency switch matrix, a channel simulation instrument connected with the attenuator, and a controller respectively connected with the radio frequency switch matrix, the attenuator and the channel simulation instrument, and is characterized in that the method comprises the following steps:

a radio frequency switch matrix of the device receives radio frequency signals issued by a plurality of paths of network equipment and parameter information of a reference mobile terminal;

the controller of the device controls the radio frequency switch matrix to select a target reference mobile terminal matched with the parameter information according to the parameter information of the reference mobile terminal, and calculates a control script used by the attenuator and the channel simulation instrument;

an attenuator of the device processes a plurality of radio frequency signals received from the radio frequency switch matrix according to the control script calculated by the controller to obtain a plurality of attenuation processing results;

and a channel simulation instrument of the device adds a fast attenuation channel influence to the attenuation processing result, combines the signals into a path of signal and sends the signal to the target reference mobile terminal.

10. The method for testing interoperation between a network device and a mobile terminal according to claim 9, wherein the step of measuring the parameter information of the mobile terminal includes: the method comprises the steps of measuring manufacturer information, system information and version information of the mobile terminal;

controlling the radio frequency switch matrix to select a target reference mobile terminal matched with the parameter information according to the parameter information of the reference mobile terminal, and calculating a control script used by the attenuator and the channel simulation instrument specifically comprises the following steps:

generating a logic circuit control instruction according to the manufacturer information, the system information and the version information of the reference mobile terminal, and controlling the radio frequency switch matrix to select a target reference mobile terminal consistent with the reference mobile terminal according to the logic circuit control instruction;

a first control script used by the attenuator and a second control script used by the channel simulation meter are calculated.

11. The method for testing interoperation of a network device and a mobile terminal according to claim 10, wherein the step of calculating the first control script used by the attenuator comprises:

setting an attenuation value initial value of the attenuator;

and setting the moving speed of the reference mobile terminal and the sampling time granularity of large-scale fading, and calculating the variable quantity of the radio frequency signal according to a propagation formula.

12. The method as claimed in claim 11, wherein the attenuator has an initial value of attenuation value of 0 or a path loss value at D-D1, where D is inter-site distance and D1 is the starting point D1 of the serving base station where the mobile terminal is located.

13. The method of claim 11, wherein the step of calculating the variation of the rf signal according to the propagation formula comprises:

sampling every Ts once, wherein the moving speed of the mobile terminal is V, and the moving distance L = V multiplied by Ts within the time of Ts;

according to the path loss function: PL = F (L) calculating the variation of the rf signal, where PL is the path loss, i.e. the most dominant large scale fading, within the moving distance L, and F is a function of a logarithm, a constant, etc.;

and giving the increment and decrement values required by the variation of the radio frequency signal to the programmable attenuator.

14. The method of claim 13, wherein before the step of assigning the programmable attenuator the increment or decrement required by the variation of the rf signal, the method further comprises:

generating random shadow fading according to the variance and the mean of the shadow fading;

and superposing the random shadow fading and the path loss to form the variable quantity of the radio frequency signal which accords with the actual propagation environment.