Anti-interference test method, device and system for Bluetooth equipment

Abstract

The invention provides an anti-interference test method, device and system for a Bluetooth device. The method comprises a to-be-tested Bluetooth device, a test accompanying device, an analysis device and an interference source. Communication connection is established between the to-be-tested Bluetooth equipment and the test accompanying equipment; the interference source acts on a communication link between the to-be-tested Bluetooth device and the test accompanying device and is used for providing an interference signal; the interference source comprises a first interference source and a second interference source, the first interference source is used for providing an interference signal covering a Bluetooth full frequency band, and the second interference source is used for providing an interference signal for a Bluetooth specific frequency band; and the analysis equipment is used for acquiring a communication record of the to-be-tested Bluetooth equipment and the test accompanying equipment, and evaluating the anti-interference performance of the to-be-tested Bluetooth equipment based on the communication record. According to the invention, the anti-interference performance of the Bluetooth equipment can be evaluated more accurately in a laboratory environment.

Description

Technical Field

[0001] This invention relates to the field of Bluetooth device testing technology, and more specifically, to a method for testing the anti-interference capabilities of Bluetooth devices, a testing apparatus for implementing the method, and a testing system including the apparatus. Background Technology

[0002] With the continuous development of wireless technology, wireless devices have become mainstream in the market. Bluetooth technology, as a globally universal short-range wireless communication technology, focuses its core operating frequency band on the 2.4GHz ISM band. Due to the characteristic that it can be used globally without authorization, this band has become the common choice for many wireless technologies such as Bluetooth, Wi-Fi, and ZigBee. As a result, in real life, when Bluetooth wireless devices are in a complex communication environment with multiple devices coexisting, problems such as packet loss, increased latency, and connection interruption often occur.

[0003] Therefore, the anti-interference capability of Bluetooth wireless devices cannot be ignored. Current technologies typically test the anti-interference capability of Bluetooth wireless devices by setting up a test environment, introducing an interference source, providing interference signals during Bluetooth device communication, and extracting the data reception status of the Bluetooth device during the interference process to evaluate its anti-interference performance. However, this method of evaluating product performance based on a laboratory environment is rather one-sided; it can only evaluate the hardware performance of the chip in a single Bluetooth operating state and cannot assess the performance of the entire system.

[0004] Subsequently, real-world scenario testing was introduced during the testing process. Anti-interference capabilities were tested in various everyday settings, such as shopping malls, train stations, and airports—areas with high interference signal density. This testing method more closely mirrors real-life environments, yielding more ideal test results. However, comparative testing under different interference environments cannot guarantee complete consistency. Different hardware structures, testing times, and locations can all introduce uncertainties. Multiple comparative tests also lead to a significant waste of testing manpower and time. Furthermore, the uncertainty of the environment greatly hinders the optimization of interference solutions. Summary of the Invention

[0005] The present invention aims to provide a testing environment that meets the requirements of test environment controllability and test scenario authenticity when conducting anti-interference tests on Bluetooth devices, thereby more accurately evaluating the anti-interference performance of Bluetooth devices.

[0006] In a first aspect, a method for testing the anti-interference capabilities of a Bluetooth device is provided, including a Bluetooth device under test, a companion device, an analysis device, and an interference source; The Bluetooth device under test establishes a communication connection with the accompanying device; The interference source acts on the communication link between the Bluetooth device under test and the companion device to provide interference signals; the interference source includes a first interference source and a second interference source, the first interference source is used to provide interference signals covering the entire Bluetooth frequency band, and the second interference source is used to provide interference signals targeting a specific Bluetooth frequency band; The analysis device is used to acquire communication records between the Bluetooth device under test and the companion device, and to evaluate the anti-interference level of the Bluetooth device under test based on the communication records.

[0007] In conjunction with the first aspect, in one possible implementation, the method further includes a first adjustable attenuator connected to the Bluetooth device under test, a second adjustable attenuator connected to the companion device, a third adjustable attenuator connected to the first interference source, and a fourth adjustable attenuator connected to the second interference source.

[0008] In conjunction with the first aspect, in one possible implementation, the interference signal provided by the second interference source for a specific Bluetooth frequency band is specifically an interference signal for a specific continuous Bluetooth frequency band and / or a specific discrete Bluetooth frequency band.

[0009] In conjunction with the first aspect, in one possible implementation, the interference signal provided by the second interference source targeting a specific Bluetooth frequency band includes: Provide no fewer than a preset number of specific frequency bands; and / or Provides fewer specific frequency bands than the preset number.

[0010] Secondly, an anti-interference testing device for Bluetooth devices is provided, including a Bluetooth device under test, a companion device, an analysis device, and an interference source; The Bluetooth device under test establishes a communication connection with the accompanying device; The interference source acts on the communication link between the Bluetooth device under test and the companion device to provide interference signals; the interference source includes a first interference source and a second interference source, the first interference source is used to provide interference signals covering the entire Bluetooth frequency band, and the second interference source is used to provide interference signals targeting a specific Bluetooth frequency band; The analysis device is used to acquire communication records between the Bluetooth device under test and the companion device, and to evaluate the anti-interference level of the Bluetooth device under test based on the communication records.

[0011] In conjunction with the second aspect, in one possible implementation, the device further includes a first adjustable attenuator connected to the Bluetooth device under test, a second adjustable attenuator connected to the companion device, a third adjustable attenuator connected to the first interference source, and a fourth adjustable attenuator connected to the second interference source.

[0012] In conjunction with the second aspect, in one possible implementation, the interference signal provided by the second interference source for a specific Bluetooth frequency band is specifically an interference signal for a specific continuous Bluetooth frequency band and / or a specific discrete Bluetooth frequency band.

[0013] In conjunction with the second aspect, in one possible implementation, the interference signal provided by the second interference source targeting a specific Bluetooth frequency band includes: Provide no fewer than a preset number of specific frequency bands; and / or Provides fewer specific frequency bands than the preset number.

[0014] Thirdly, a testing system is provided, including a Bluetooth device under test, a companion device, an analysis device, and an interference source; The Bluetooth device under test establishes a communication connection with the accompanying device; The interference source acts on the communication link between the Bluetooth device under test and the companion device to provide interference signals; the interference source includes a first interference source and a second interference source, the first interference source is used to provide interference signals covering the entire Bluetooth frequency band, and the second interference source is used to provide interference signals targeting a specific Bluetooth frequency band; The analysis device is used to acquire communication records between the Bluetooth device under test and the companion device, and to evaluate the anti-interference level of the Bluetooth device under test based on the communication records.

[0015] In conjunction with the third aspect, in one possible implementation, the system further includes a first adjustable attenuator connected to the Bluetooth device under test, a second adjustable attenuator connected to the companion device, a third adjustable attenuator connected to the first interference source, and a fourth adjustable attenuator connected to the second interference source. This invention replicates the combined characteristics of full-frequency interference and strong local interference in specific frequency bands in real-world scenarios by setting up different interference sources that provide interference signals in different frequency bands. This provides a stable and controllable experimental environment for anti-interference performance evaluation, avoiding the problem of inaccurate test conclusions due to uncontrollable interference scenarios. Furthermore, it eliminates the need to change test sites or hardware, significantly reducing test manpower and material costs, and can meet the needs of mass production. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a device connection block diagram for an anti-interference testing method provided in an embodiment of this application.

[0018] Figure 2 A device connection block diagram for another anti-interference testing method provided in an embodiment of this application.

[0019] Figure 3 A device connection block diagram for another anti-interference testing method provided in an embodiment of this application. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0021] It should be noted that, unless there is a conflict, the various features in the embodiments of this application can be combined with each other, all of which are within the protection scope of this application. Furthermore, although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than the module division in the device or the order in the flowchart. Moreover, the terms "first," "second," and "third" used in this application do not limit the data or execution order, but only distinguish identical or similar items with essentially the same function and effect.

[0022] This application proposes an anti-interference testing method for Bluetooth devices, including a Bluetooth device under test, a companion device, an analysis device, and an interference source; The Bluetooth device under test establishes a communication connection with the accompanying device; The interference source acts on the communication link between the Bluetooth device under test and the companion device to provide interference signals; the interference source includes a first interference source and a second interference source, the first interference source is used to provide interference signals covering the entire Bluetooth frequency band, and the second interference source is used to provide interference signals targeting a specific Bluetooth frequency band; The analysis device is used to acquire communication records between the Bluetooth device under test and the companion device, and to evaluate the anti-interference level of the Bluetooth device under test based on the communication records.

[0023] The Bluetooth devices under test mentioned above are Bluetooth terminals that require anti-interference performance testing, including but not limited to Bluetooth headsets, Bluetooth speakers, Bluetooth sensors, Bluetooth modules, and other devices with Bluetooth communication capabilities.

[0024] The aforementioned auxiliary testing equipment is an auxiliary device that establishes a standard Bluetooth communication connection with the Bluetooth device under test. It must have stable Bluetooth communication capabilities, such as Bluetooth headsets, Bluetooth speakers, Bluetooth gateways, smartphones, and dedicated Bluetooth testing instruments, to simulate the actual communication object of the device under test.

[0025] The aforementioned analysis equipment is equipped with data acquisition, storage, and analysis functions, including but not limited to oscilloscopes, spectrum analyzers, and dedicated communication data analyzers. It can acquire communication data between the device under test and the accompanying device in real time (such as data transmission rate, packet loss rate, bit error rate, and connection hold time), and evaluate the degree of anti-interference based on preset indicators.

[0026] The aforementioned interference sources are devices used to generate interference signals, such as signal generators. The first interference source can generate interference signals covering the entire Bluetooth operating frequency band (2.402GHz-2.480GHz) to simulate a broad-spectrum electromagnetic interference scenario. The second interference source can generate interference signals targeting specific sub-frequency bands within the Bluetooth operating frequency band to simulate a localized, precise interference scenario.

[0027] The aforementioned communication records are real-time data sets or recorded data sets generated during Bluetooth communication between the Bluetooth device under test and the companion device, which can be used to evaluate communication quality. Specifically, they include: Basic transmission data: data transmission rate, total number of data frames, number of successfully received data frames, number of lost data frames; Communication quality data: bit error rate (number of error bits / total number of transmitted bits), connection hold time (duration of continuous stable communication), number of connection interruptions (number of times the communication link is broken and re-established), communication delay (time difference between sending and receiving a data frame); Frequency band interaction data (for Bluetooth devices that support frequency hopping): current operating frequency band number, frequency band switching trigger time, changes in communication parameters before and after the switching (such as rate, bit error rate). This dataset can be obtained from the Bluetooth communication link or the device's serial port through analysis, and it is the core basis for evaluating the anti-interference level of the Bluetooth device under test.

[0028] Bluetooth communication operates at frequencies of 2.402 GHz – 2.480 GHz. The protocol specifies a total bandwidth of 78 MHz for this frequency band and divides it into multiple communication channels with consistent bandwidth. Classic Bluetooth specifies 79 data channels, each with a bandwidth of 1 MHz, while Bluetooth Low Energy specifies 40 channels, including 3 broadcast channels and 37 data channels, each with a bandwidth of 2 MHz.

[0029] The interference signal provided by the first interference source covering the entire Bluetooth frequency band is 2.402GHz – 2.480GHz, covering 79 channels of Classic Bluetooth and 40 channels of Bluetooth Low Energy. In this invention, the first interference source provides full-band interference.

[0030] The interference signal provided by the second interference source for a specific Bluetooth frequency band is the interference signal generated by focusing on a specific channel or channel combination within the 2.402GHz-2.480GHz operating frequency band. The interference provided by the second interference source is local interference, and there can be more than one second interference source. Different second interference sources can apply different specific frequency band interference signals.

[0031] The purpose of a specific frequency band interference signal is to specifically enhance the power of a certain sub-frequency band in the full-band interference. Through the power superposition effect, the interference intensity of the target specific frequency band is increased from the basic level of the full-band interference to the local enhanced level, while other sub-frequency bands in the full-band interference still maintain the basic interference intensity. In the end, a distribution of interference is formed with full-band interference and local sub-frequency band interference being stronger due to superposition, which perfectly matches the characteristics of multiple interference sources superimposed in local frequency bands in the actual environment.

[0032] In some specific embodiments, reference is made to Figure 1 As shown, the analysis device connects to the communication link between the Bluetooth device under test (DUT) and the companion device, captures all Bluetooth data frames transmitted between the DUT and the companion device in real time, reconstructs the complete communication process, and then analyzes the impact of interference on communication quality.

[0033] In some specific embodiments, refer to Figure 2 As shown, the analysis device connects to the Bluetooth device under test and reads the operation logs generated inside the device, including status logs, communication logs, and abnormal alarm logs, to analyze the working status under interference from the device's own perspective.

[0034] In some specific implementations, refer to Figure 3 As shown, the method further includes a first adjustable attenuator connected to the Bluetooth device under test, a second adjustable attenuator connected to the companion device, a third adjustable attenuator connected to the first interference source, and a fourth adjustable attenuator connected to the second interference source.

[0035] The adjustable attenuator acts on the communication and interference signals in the solution to simulate signal propagation loss in real-world scenarios, precisely control interference intensity, and ensure that the test environment is highly consistent with the real-world usage scenario.

[0036] The first adjustable attenuator is connected to the Bluetooth device under test (BUT) to simulate the attenuation of the communication signal caused by distance or obstacles in actual use, ensuring that the transmit and receive signal strength of the BUT meets the power range in actual use.

[0037] The second adjustable attenuator is connected to the test equipment and works in conjunction with the first adjustable attenuator to simulate the signal propagation loss on the test equipment side, ensuring that the signal attenuation at both ends of the communication link conforms to the actual scenario, rather than only one-sided attenuation.

[0038] The third adjustable attenuator is connected to the first interference source and is used to simulate the distance attenuation or environmental blockage attenuation of the full-band interference source in a real scenario, thereby controlling the basic strength of the full-band interference.

[0039] The fourth adjustable attenuator is connected to the second interference source and is used to precisely control the signal power of interference in a specific frequency band.

[0040] By coordinating the adjustment of the first, second, third, and fourth adjustable attenuators, the actual signal propagation loss is reproduced, making it more closely resemble real-life usage scenarios.

[0041] In some specific embodiments, the interference signal provided by the second interference source for a specific Bluetooth frequency band is specifically an interference signal for a specific continuous Bluetooth frequency band and / or a specific discrete Bluetooth frequency band.

[0042] The aforementioned continuous frequency bands are sub-bands composed of consecutively numbered protocol channels within the operating frequency bands specified by the Bluetooth protocol. Their frequency ranges are uninterrupted and have continuous coverage. For example, Classic Bluetooth has 79 channels, numbered sequentially from 0 to 78. A continuous frequency band could be composed of 23 consecutive channels, numbered 35 to 57. Similarly, Bluetooth Low Energy has 40 channels, numbered sequentially from 0 to 39. A continuous frequency band could be composed of 9 consecutive data channels, numbered 12 to 20.

[0043] The aforementioned discrete frequency bands are sub-bands composed of protocol channels with non-contiguous numbering within the operating frequency band specified by the Bluetooth protocol. Their frequency ranges are spaced apart. For example, it can be a discrete frequency band composed of 20 discrete channels, such as classic Bluetooth channels 10, 14, 16, 20, 22, 28, 31, 33, 35, 38, 40, 43, 46, 48, 51, 56, 59, 64, 67, and 70. Alternatively, it can be a discrete frequency band composed of 10 discrete channels, such as low-power Bluetooth channels 4, 8, 10, 13, 17, 19, 21, 25, 27, and 33.

[0044] The interference signal provided by the second interference source can be a single continuous frequency band, multiple discrete frequency bands, or a combination of multiple discontinuous continuous frequency bands. This invention does not impose any limitations on these components.

[0045] In some specific embodiments, the interference signal provided by the second interference source targeting a specific Bluetooth frequency band includes: Provide no fewer than a preset number of specific frequency bands; and / or Provides fewer specific frequency bands than the preset number.

[0046] In Bluetooth technology, Adaptive Frequency Hopping (AFH) is a core anti-interference mechanism designed by the Bluetooth core protocol to cope with the complex interference in the 2.4GHz ISM band. Its essence is to dynamically avoid interference channels and optimize the frequency hopping sequence to ensure that Bluetooth devices can maintain stable communication when the local frequency band is interfered with. By monitoring the interference intensity of all working channels in real time, the channels are classified according to the degree of interference, and then interference channels are removed from the frequency hopping sequence, leaving only the usable channels for data transmission, thereby avoiding interference channels.

[0047] The aforementioned preset quantity is a threshold value for the number of interference channels pre-set based on the total number of AFH channels and the minimum number of available channels recommended by the protocol for the Bluetooth device type (Classic Bluetooth / BLE). It is used to test the adaptive frequency hopping capability of the Bluetooth device under test. The preset quantity = total number of channels - (minimum available channels + redundant channels). The redundant channel number is a buffer set to prevent the number of available channels from falling below the minimum threshold when the number of interference channels approaches the preset quantity. It is usually taken as 5%-10% of the total number of channels. For different Bluetooth types, such as Classic Bluetooth with 79 total channels and 20 minimum available channels, the redundant channel number is 79 * 5% ≈ 4. That is, the maximum preset quantity can be 79 – 20 – 4 = 55.

[0048] When the second interference source provides no less than a preset number of specific frequency bands, the aim is to simulate dense interference scenarios with multiple devices, such as shopping malls and train stations, to verify whether the Bluetooth device under test can quickly select enough available channels from the remaining channels when a large number of commonly used channels are interfered with. The basic interference of the full frequency band has already caused weak interference in all channels. After the specific frequency band interference is superimposed, the available channel space for adaptive frequency hopping is greatly squeezed. It is necessary to quickly select available resources in a mixed channel environment of weak interference channels covered by the full frequency band and strong interference channels covered by the specific frequency band, thus testing the frequency hopping resilience of the Bluetooth device under test.

[0049] When the second interference source provides fewer than the preset number of specific frequency bands, it aims to simulate interference scenarios with a small number of devices in places such as offices and libraries, to verify the frequency hopping efficiency of the device in daily scenarios, and to ensure the accuracy of channel assessment. The basic interference of the entire frequency band still covers all channels, but after superimposing the interference of specific frequency bands, only a few channels become strong interference channels. The available channel space for adaptive frequency hopping is sufficient, and there is no need to further filter resources. Instead, it tests the Bluetooth device under test's rapid response to precise interference and frequency hopping efficiency.

[0050] When the Bluetooth device under test communicates under conditions where channel resources are squeezed by both the full frequency band and a specific frequency band, the frequency hopping performance of the Bluetooth device under test under combined interference can be comprehensively evaluated. If the device has a high recognition rate of strong interference channels and reasonable selection of available channels when the preset number is large, and fast switching speed and small latency fluctuation when the preset number is small, then its anti-interference performance can cover all scenarios of interference from daily to extreme, and the product performance meets the standards. Conversely, if the device only performs well when the preset number is small and performs poorly when the preset number is large, then it is only suitable for low interference scenarios, and the anti-interference performance of the Bluetooth device under test needs to be optimized and improved.

[0051] The anti-interference test method of this application has been introduced above. The anti-interference device and system corresponding to this application are introduced below: As another aspect of the embodiments of this application, this application provides an anti-interference testing device for Bluetooth devices, including a Bluetooth device under test, a companion device, an analysis device, and an interference source; The Bluetooth device under test establishes a communication connection with the accompanying device; The interference source acts on the communication link between the Bluetooth device under test and the companion device to provide interference signals; the interference source includes a first interference source and a second interference source, the first interference source is used to provide interference signals covering the entire Bluetooth frequency band, and the second interference source is used to provide interference signals targeting a specific Bluetooth frequency band; The analysis device is used to acquire communication records between the Bluetooth device under test and the companion device, and to evaluate the anti-interference level of the Bluetooth device under test based on the communication records.

[0052] In some specific embodiments, the device further includes a first adjustable attenuator connected to the Bluetooth device under test, a second adjustable attenuator connected to the companion device, a third adjustable attenuator connected to the first interference source, and a fourth adjustable attenuator connected to the second interference source.

[0053] In some specific embodiments, the interference signal provided by the second interference source for a specific Bluetooth frequency band is specifically an interference signal for a specific continuous Bluetooth frequency band and / or a specific discrete Bluetooth frequency band.

[0054] In some specific embodiments, the interference signal provided by the second interference source targeting a specific Bluetooth frequency band includes: Provide no fewer than a preset number of specific frequency bands; and / or Provides fewer specific frequency bands than the preset number.

[0055] Furthermore, as another aspect of the embodiments of this application, the embodiments of this application provide a testing system, including a Bluetooth device under test, a companion device, an analysis device, and an interference source; The Bluetooth device under test establishes a communication connection with the accompanying device; The interference source acts on the communication link between the Bluetooth device under test and the companion device to provide interference signals; the interference source includes a first interference source and a second interference source, the first interference source is used to provide interference signals covering the entire Bluetooth frequency band, and the second interference source is used to provide interference signals targeting a specific Bluetooth frequency band; The analysis device is used to acquire communication records between the Bluetooth device under test and the companion device, and to evaluate the anti-interference level of the Bluetooth device under test based on the communication records.

[0056] In some specific embodiments, the system further includes a first adjustable attenuator connected to the Bluetooth device under test, a second adjustable attenuator connected to the companion device, a third adjustable attenuator connected to the first interference source, and a fourth adjustable attenuator connected to the second interference source.

[0057] The modules and specific functions of the above-mentioned devices and systems can be referred to the above-mentioned anti-interference test method, and will not be repeated here.

[0058] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A method for testing the anti-interference capabilities of a Bluetooth device, characterized in that, This includes the Bluetooth device under test, the accompanying device, the analysis device, and the interference source; The Bluetooth device under test establishes a communication connection with the accompanying device; The interference source acts on the communication link between the Bluetooth device under test and the companion device to provide interference signals; the interference source includes a first interference source and a second interference source, the first interference source is used to provide interference signals covering the entire Bluetooth frequency band, and the second interference source is used to provide interference signals targeting a specific Bluetooth frequency band; The analysis device is used to acquire communication records between the Bluetooth device under test and the companion device, and to evaluate the anti-interference level of the Bluetooth device under test based on the communication records.

2. The method according to claim 1, characterized in that, The method further includes a first adjustable attenuator connected to the Bluetooth device under test, a second adjustable attenuator connected to the companion device, a third adjustable attenuator connected to the first interference source, and a fourth adjustable attenuator connected to the second interference source.

3. The method according to claim 1 or 2, characterized in that, The interference signal provided by the second interference source is a specific interference signal targeting a specific Bluetooth frequency band, specifically a specific continuous Bluetooth frequency band and / or a specific discrete Bluetooth frequency band.

4. The method according to claim 3, characterized in that, The interference signal provided by the second interference source, targeting a specific Bluetooth frequency band, includes: Provide no fewer than a preset number of specific frequency bands; and / or Provides fewer specific frequency bands than the preset number.

5. An anti-interference testing device for Bluetooth devices, characterized in that, This includes the Bluetooth device under test, the accompanying device, the analysis device, and the interference source; The Bluetooth device under test establishes a communication connection with the accompanying device; The interference source acts on the communication link between the Bluetooth device under test and the companion device to provide interference signals; the interference source includes a first interference source and a second interference source, the first interference source is used to provide interference signals covering the entire Bluetooth frequency band, and the second interference source is used to provide interference signals targeting a specific Bluetooth frequency band; The analysis device is used to acquire communication records between the Bluetooth device under test and the companion device, and to evaluate the anti-interference level of the Bluetooth device under test based on the communication records.

6. The apparatus according to claim 5, characterized in that, The device further includes a first adjustable attenuator connected to the Bluetooth device under test, a second adjustable attenuator connected to the companion device, a third adjustable attenuator connected to the first interference source, and a fourth adjustable attenuator connected to the second interference source.

7. The apparatus according to claim 5 or 6, characterized in that, The interference signal provided by the second interference source is a specific interference signal targeting a specific Bluetooth frequency band, specifically a specific continuous Bluetooth frequency band and / or a specific discrete Bluetooth frequency band.

8. The apparatus according to claim 7, characterized in that, The interference signal provided by the second interference source, targeting a specific Bluetooth frequency band, includes: Provide no fewer than a preset number of specific frequency bands; and / or Provides fewer specific frequency bands than the preset number.

9. A testing system, characterized in that, This includes the Bluetooth device under test, the accompanying device, the analysis device, and the interference source; The Bluetooth device under test establishes a communication connection with the accompanying device; The interference source acts on the communication link between the Bluetooth device under test and the companion device to provide interference signals; the interference source includes a first interference source and a second interference source, the first interference source is used to provide interference signals covering the entire Bluetooth frequency band, and the second interference source is used to provide interference signals targeting a specific Bluetooth frequency band; The analysis device is used to acquire communication records between the Bluetooth device under test and the companion device, and to evaluate the anti-interference level of the Bluetooth device under test based on the communication records.

10. The system according to claim 9, characterized in that, The system also includes a first adjustable attenuator connected to the Bluetooth device under test, a second adjustable attenuator connected to the companion device, a third adjustable attenuator connected to the first interference source, and a fourth adjustable attenuator connected to the second interference source.

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