[0038] like figure 1 As shown, the base station system for online detection of the base station antenna feeder system includes a base station antenna system, a base transceiver station (BTS), and a base station antenna feeder system connected between the two. The base station antenna system includes antenna test accessories placed at the fixed position of the antenna for fixed testing of the mobile terminal; the antenna test accessories include a fixed test position for placing the test mobile terminal, so that the test mobile terminal transmits signals at the fixed test position The polarization direction of the base station is relatively fixed with the polarization direction of each receiving antenna of the base station, and the output characteristics of each receiving antenna of the base station are fixed within a preset error range.
[0039] The output characteristics of the base station receiving antenna are fixed within the preset error range, which means that the forward gain and reverse gain of the antenna relative to the test terminal (for example, the test mobile terminal or the test mobile phone) are fixed; the forward gain of the antenna relative to the test terminal is Refers to the difference between the input signal power (PTA) of the antenna input interface and the detected signal power (PRM) received by the antenna port of the test terminal; the reverse gain of the antenna relative to the test terminal refers to the transmit signal power (PTM) of the test terminal and the test terminal. The difference between the output signal power (PRA) of the antenna output interface.
[0040] In a typical application, for a dual-polarized antenna that integrates multiple receiving antennas, the antenna test accessory enables the test terminal to transmit the polarization direction of the signal at the fixed test position and the polarization direction of each receiving antenna of the dual-polarized antenna. Similarly, the output characteristics of each receiving antenna of the dual-polarized antenna are the same within a preset error range.
[0041] The antenna kit referred to in the present invention includes a test terminal, an antenna test accessory and an antenna. The antenna test accessories include a fixed test position for placing the test terminal, so that the polarization direction of the signal transmitted by the test terminal when the test position is fixed is relatively fixed with the polarization direction of the antenna, and the output characteristics of the antenna are Fixed within a preset error range. The fixed output characteristic of the antenna within the preset error range means that the forward gain of the antenna relative to the test terminal is fixed and the reverse gain is fixed; the forward gain of the antenna relative to the test terminal refers to the input signal power of the antenna input interface ( The difference between PTA) and the detected signal power (PRM) received by the antenna port of the test terminal; the reverse gain of the antenna relative to the test terminal refers to the transmit signal power (PTM) of the test terminal and the output signal power (PRA) of the antenna output interface. ) difference.
[0042] like figure 2 As shown, the antenna test accessory is an integral part of the antenna and is located in a fixed position in front of the antenna. The antenna test accessories can be flexibly installed and removed; when the base station tests the antenna feeder system online, the antenna test accessories are installed in a fixed position in front of the antenna; when the base station is working normally, the test accessories are removed. Antennas, antenna test accessories and the mobile terminals used for testing can be an integral antenna product with fixed performance characteristics, whose performance quality is designed, produced and guaranteed by the manufacturer.
[0043] The base station antenna system is also used to store the characteristic parameters of each radio frequency component of the base station antenna feeder system, the forward gain and reverse gain of the antenna relative to the test terminal, and the index parameters or reflections of the standing waves of each connection node of the base station antenna feeder system. The index parameters of the loss, the allowable error of the transmission loss of the base station antenna-feeder system; the characteristic parameters of the radio frequency components include the insertion loss parameters of the radio frequency components. Before the test, the characteristic parameters of the radio frequency components in the base station antenna-feeder system and the performance index parameters of the interface connection nodes of each radio frequency component are configured in the base station system.
[0044] refer to image 3 and Figure 4 As shown, the base station antenna-feeder system in this embodiment is composed of the following radio frequency components:
[0045] 1) "Integral antenna with test accessories (including test mobile terminals)"; 2) (1/2)" jumper at the antenna end; 3) RF connector; 4) (7/8)" feeder; 5) Lightning arrester; 6) The (1/2)" jumper on the base station side; the (1/2)" jumper, RF connector, (7/8)" feeder and arrester are all two-port RF devices, all of which have the performance of two-port RF devices Parameters, such as: application frequency band, S-parameter, insertion loss, standing wave, etc. Among them, "the overall antenna with test accessories (including test mobile terminal), its performance parameters include: application frequency band, S-parameter of antenna interface, standing wave ratio parameters; also include: forward gain and reverse gain of the overall antenna; "forward gain of the overall antenna" is defined as: the input signal power (PTA) of the antenna input interface and the signal power received and detected by the antenna port of the test mobile terminal (PRM) difference; "reverse gain of the overall antenna" is defined as: the difference between the transmit signal power (PTM) of the test mobile terminal and the output signal power (PRA) of the antenna output interface.
[0046] refer to image 3 As shown, each link of the base station antenna-feeder system in this embodiment has 7 connection nodes, which are node A, node B, node C, node D, node E, and node F respectively. According to the design and installation index of the base station system, the standing wave (VSWR) performance index of each connection node can be known.
[0047] The base station system includes the software detection module of the base station antenna feeder system, including the software detection module in the mobile terminal, the software detection module in the base station system, and the software detection management module of the base station antenna feeder system in the network management background (OMC) of the base station system. Among them, the software detection and management module of the base station antenna feeder system in the network management background (OMC) of the base station system includes a parameter input window for the characteristic parameter variables of the radio frequency components of the base station antenna feeder system, which is used to input the base station corresponding to the implementation of the base station project. The characteristic parameter data of the radio frequency components of the antenna-feeder system, such as the length parameter of the feeder.
[0048] Among them, the detection software module in the test terminal includes a detection software module for detecting the transmitted signal power of the terminal antenna interface, a detection software module for detecting the received signal power of the terminal antenna interface, and also the terminal exchanges information with the base station for detection. communication software module. The software detection module in the base station system includes the detection software module for detecting the transmit signal power of the antenna interface of the base station, including the detection software module for detecting the received signal power of the antenna interface of the base station, and also includes the information that the base station system communicates with the test mobile terminal to realize the detection. Interactive communication software modules.
[0049] On each receiver link of the base transceiver system (BTS), there is a link switch controlled by software, which can be controlled by software to realize "any connection and shutdown of each receiver link" and realize " Select one receiver link to be connected as needed, and other receiver links to be closed" working mode.
[0050] Among them, the ADC circuit module on the main diversity receiver link of the base transceiver system (BTS) adopts AD6655 chip, and each ADC output link can be controlled by the system software through the SPI interface of AD6655 to realize "main diversity". The link is connected at the same time, only the main set is connected (diversity is closed) and only the diversity is connected (the main set is closed)" three working modes. In the base station system of the above-mentioned embodiment, the DAC circuit module on the main transmitter link of the base station transceiver system (BTS) adopts the DAC5682 chip, and the DAC output link can be realized by the system software through the software control interface of the DAC5682 switch control.
[0051] When detecting the forward link of the base station antenna feeder system, the base station antenna system calculates the signal power loss threshold of the forward link in the base station antenna feeder system according to the pre-stored parameters of the base station antenna feeder system; and calculates the base station antenna feeder system in real time. The actual signal power loss of the forward link in the antenna-feeder system; compare the real-time calculation of the actual signal power loss of the forward link of the base station antenna-feeder system with the signal power loss threshold in the forward link of the antenna-feeder system. When the power loss is less than or equal to the power loss threshold, it is determined that the forward link of the base station antenna feeder system is normal, and when the actual signal power loss is greater than the power loss threshold, it is determined that the forward link of the base station antenna feeder system is abnormal.
[0052] When detecting the forward link of the base station antenna feeder system, the base station antenna system calculates the signal power loss threshold of the reverse link in the base station antenna feeder system according to the pre-stored parameters of the base station antenna feeder system; and calculates the base station antenna feeder system in real time. The actual signal power loss of the reverse link in the antenna-feeder system; compare the actual signal power loss of the reverse link of the base station antenna-feeder system calculated in real time with the signal power loss threshold in the reverse link of the antenna-feeder system. When the power loss is less than or equal to the power loss threshold, it is determined that the reverse link of the base station antenna-feeder system is normal, and when the actual signal power loss is greater than the power loss threshold, it is determined that the reverse link of the base station antenna-feeder system is abnormal.
[0053] like Figure 5 As shown, the method corresponding to the above-mentioned base station system for online detection of a base station antenna feeder system includes: placing an antenna test accessory for fixedly testing a mobile terminal at a fixed position of the antenna in the base station antenna system; the antenna test accessory includes an antenna test accessory for placing Test the fixed test bit of the mobile terminal, so that the polarization direction of the transmitted signal of the mobile terminal is relatively fixed with the polarization direction of each receiving antenna of the base station when the test mobile terminal is in this fixed test position, and the output characteristics of each receiving antenna of the base station are fixed within the preset error range A test mobile terminal is placed in the fixed test position of the antenna test accessory, and the base station antenna feeder system is detected through the information exchange between the test mobile terminal and the base station system.
[0054] The fixed output characteristic of the base station receiving antenna within the preset error range refers to the fixed forward gain and reverse gain of the antenna relative to the test terminal; the forward gain of the antenna relative to the test terminal refers to the input signal power of the antenna input interface ( The difference between PTA) and the detected signal power (PRM) received by the antenna port of the test terminal; the reverse gain of the antenna relative to the test terminal refers to the transmit signal power (PTM) of the test terminal and the output signal power (PRA) of the antenna output interface. ) difference.
[0055] In a typical application, for a dual-polarized antenna that integrates multiple receiving antennas, the antenna test accessory enables the test terminal to transmit the polarization direction of the signal at the fixed test position and the polarization direction of each receiving antenna of the dual-polarized antenna. Similarly, the output characteristics of each receiving antenna of the dual-polarized antenna are the same within a preset error range.
[0056] The base station system communicates with the base station system through the test mobile terminal on the antenna test accessories, as well as the detection of the signal transmitted by the antenna port of the test mobile terminal, the detection of the signal received by the antenna port of the test mobile terminal, and the transmission of the signal to the forward antenna port of the base station. Detection and detection of the received signal at the reverse antenna port of the base station to realize online intelligent detection of the antenna feeder system of the base station.
[0057] Before the test, the characteristic parameters of the radio frequency components in the base station antenna-feeder system and the performance index parameters of the interface connection nodes of each radio frequency component are configured in the base station system. Specifically include the following steps:
[0058] 1) Pre-store the characteristic parameters of each radio frequency component of the base station antenna-feeder system, including the characteristic parameters of the "integral antenna with test accessories (including test mobile terminals)".
[0059] Among them, the characteristic parameters of the length (insertion loss) of the 7/8" feeder of the base station antenna-feeder system are related to the on-site design of the base station project, and the characteristic parameters of the length (insertion loss) of the 7/8" feeder are based on the actual engineering of the base station. The data is pre-stored through the parameter input window of the characteristic parameter variable of the radio frequency component of the base station antenna-feeder system in the network management background (OMC).
[0060] 2) Pre-store the performance index parameters of the interface connection nodes of each radio frequency component of the base station antenna-feeder system.
[0061]3) According to the pre-stored characteristic parameters of each radio frequency component of the base station antenna feeder system, the performance index parameters of the interface connection of each radio frequency component, and the allowable link loss fluctuation error, the base station system calculates each forward link of the base station antenna feeder system. The signal power loss threshold PTLt and the signal power loss threshold PRLt of each reverse link of the base station antenna-feeder system.
[0062] Among them, "signal power loss of each forward link of the base station antenna feeder system" is defined as: the difference between the power PTB of the signal transmitted by the forward antenna port of the base station and the signal power PRM received and detected by the antenna port of the test mobile terminal; "Signal power loss of each reverse link of the antenna-feeder system" is defined as: the difference between the transmitted signal power PTM detected by the antenna port of the mobile terminal and the signal power PRB received by the reverse antenna port of the base station.
[0063] For the detection method of the forward link of the base station antenna feeder system, the base station system initiates the detection of the forward link of the base station antenna feeder system, and notifies the test configuration information of the test mobile terminal. The test process includes the following steps:
[0064] 1) Control the base station transceiver to open the forward link to be tested and close other forward links;
[0065] 2) The base station system transmits the test signal with the transmit signal power PTB of the base station forward antenna port;
[0066] 3) The test mobile terminal detects the received power PRM of the test signal and notifies it to the base station system;
[0067] 4) The base station system calculates the difference between the power of the transmitted signal at the forward antenna port of the base station and the received power of the test signal, PTL=(PTB-PRM);
[0068] 5) Comparing that the difference is greater than the signal power loss threshold of the forward link, determine that the forward link is abnormal, otherwise, determine that the forward link is normal;
[0069] 6) The base station system judges whether there are other forward links that need to be tested, if not, end the test of the forward link of the base station antenna feeder system; if so, continue to test other forward links of the base station system, and repeat the above steps 1) to step 6).
[0070] like image 3 The shown schematic diagram of the forward link test, in the case of knowing the following parameters: the VSWR requirements (or the requirements of the reflection loss RL) of each RF connection point of the antenna-feeder system; the characteristic parameters of the antenna-feeder radio frequency components, especially the insertion loss IL and the insertion loss IL (FG) of node F and node G, the allowable error ΔIL is known; it can be calculated: the threshold of transmission loss of the antenna-feeder system is {(PRM-PTB) + ΔIL}; The base station communicates with each other, and the transmission loss (PRM-PTB) of the antenna feeder system can be measured; therefore, by comparing the actual measurement (PRM-PTB) with the threshold, it can be automatically judged whether the forward antenna feeder link is normal.
[0071] For the detection method of the reverse link of the base station antenna feeder system, the base station system initiates the detection of the reverse link of the base station antenna feeder system, and notifies the test configuration information of the test mobile terminal. The test process includes the following steps:
[0072] 1) The base station system determines the reverse link to be tested and the preset transmit power PTM of the test mobile terminal and notifies it to the test mobile terminal;
[0073] 2) The test mobile terminal transmits a test signal with the preset transmit power;
[0074] 3) The base station system detects the received power PRB of this test signal;
[0075] 4) The base station system calculates the difference between the preset transmit power and the received power of the test signal PRL=(PTM-PRB), and when the difference is greater than the signal power loss threshold of the reverse link, it is determined that the reverse link If the link is abnormal, otherwise, it is judged that the reverse link is normal.
[0076] like Figure 4 The shown schematic diagram of the forward link test, in the case of knowing the following parameters: the characteristic parameters (including IL) of the antenna-feeder radio frequency components, and the known allowable error; it can be calculated: the transmission loss of the antenna-feeder system (PRM-PTB ) threshold; by comparing the measured loss with the threshold, it can be automatically judged whether the reverse antenna-feeder link is normal.
[0077] The above-mentioned system and method for online detection of a base station antenna feeder system, the best time to use it is during the time period when the base station project is completed and the quality of the project is checked; wherein, when the base station project is implemented and the antenna is finally installed, the antenna test The accessories and the test mobile terminals on them are also installed at the same time; the base station antenna installation is completed, and the test and verification of the base station antenna feeder system is carried out immediately. If the test passes, immediately remove the antenna test accessories and test the mobile terminal; if the test fails, immediately analyze and eliminate the fault of the antenna feeder system of the base station, and repeat the test until the test passes.
[0078] Because the base station antenna feeder system is used in the outdoor natural environment for a long time and is subject to wind and rain, it is prone to failure. Therefore, base station operators often need to maintain and test the base station antenna feeder system. At this time, if the above technical solutions continue to be used for detection, it is necessary to re-install the antenna test accessories on the base station antenna and test the mobile terminal to realize the detection, which is inconvenient to operate. To this end, a method for online detection of a base station antenna feeder system in this solution continues the following steps, namely: during the implementation and acceptance of the base station project, by testing the mobile terminal placed on the fixed test position of the antenna test accessory After the test knows that the base station antenna feeder system is normal, after removing the antenna test accessory from the antenna, it is necessary to continue to complete the following steps:
[0079] 1) Select a test point within the base station antenna coverage area to place the test mobile terminal to exchange information with the base station system, and store the measured performance data of the mobile terminal and the base station system as standard data.
[0080] This test point is a fixed test location. The test mobile terminal is used to communicate with the base station system and transmit test signals, and the performance parameters of the test mobile terminal and the base station are measured, and the measured performance data of the test mobile terminal and the base station are used as the standard. The data is stored in the database of the base station; in which "standard data measured by the mobile terminal and the base station" is in one-to-one correspondence with "the information of the fixed location test point, and the test configuration information of the base station and the terminal", and stored together in the base station system in the database.
[0081] 2) When the base station antenna feeder system needs to be tested during the operation of the base station, place the test mobile terminal on the test point for retesting; use the test mobile terminal to communicate with the base station system and transmit test signals to test the performance of the mobile terminal and the base station measurement of parameters.
[0082] 3) Determine whether the base station antenna feeder system is normal according to whether the difference between the measured performance data of the mobile terminal and the base station system and the standard data is within a preset error range.
[0083] When the measured data is equal to the standard data stored in the base station data within the preset error range, the base station antenna feeder system is in a normal state;
[0084] When the measured data and the standard data stored in the base station data are not equal within a preset error range, the base station system is faulty.
[0085] When it is found that the base station system is faulty, it can be determined whether the base station antenna feeder system is faulty by applying the existing technology and performing segmental measurement at the antenna port of the base station.
[0086] The performance parameters of the test mobile terminal and the base station measured in the above steps are all performance parameters that can be measured using the prior art, including: the minimum transmit power that the terminal can communicate normally; Received signal power and signal-to-noise ratio.
[0087] It should be noted that, the embodiments in the present application and the features in the embodiments may be arbitrarily combined with each other if there is no conflict.
[0088] Of course, the present invention can also have other various embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding Changes and deformations should belong to the protection scope of the appended claims of the present invention.
[0089] Those skilled in the art can understand that all or part of the steps in the above method can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a magnetic disk or an optical disk. Optionally, all or part of the steps in the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiments may be implemented in the form of hardware, or may be implemented in the form of software function modules. The present invention is not limited to any particular form of combination of hardware and software.
