Indoor distribution project pre-acceptance inspection indoor distribution signal detection system and method and storage medium

Abstract

The invention provides an indoor distribution project pre-acceptance indoor distribution signal detection system and method and a storage medium. The method comprises an analog signal source subsystem which is used for inputting a signal source of an analog real base station signal of a passive indoor distribution DAS subsystem; the front-end detection subsystem comprises an indoor distribution signal detection platform and a wireless signal detector, and the wireless signal detector is used for receiving a signal of a corresponding passive indoor distribution antenna and carrying out signal analysis processing to obtain signal measurement information of a baseband signal; the signal quality judgment module is also used for judging signal quality according to the signal measurement information; the wireless signal detector is also used for carrying out related quality performance test on the passive indoor distribution antenna; and the indoor distribution signal detection platform is used for receiving a signal quality judgment result of the wireless signal detector, carrying out related quality performance test, carrying out data analysis, and forming corresponding alarm information and / or a decision instruction, so that work improvement in an indoor distribution pre-acceptance inspection process is facilitated, and the requirement of an acceptance inspection index is met. According to the method, the multi-dimensional network parameters of the passive indoor distribution antenna can be obtained, the pre-acceptance work of the indoor distribution construction project can be comprehensively assisted, and the efficiency of formal acceptance work of the indoor distribution construction project is improved.

Description

Technical Field

[0001] The present invention relates to the field of mobile communication technology, and in particular to a room signal detection system, method and storage medium for pre-acceptance of a room project. Background Art

[0002] The current mainstream 4G / 5G indoor distribution system is mainly the traditional passive DAS (Passive Distributed Antenna System) system. Figure 1 As shown in the passive DAS system architecture diagram, the passive indoor distribution system (DAS) is composed of traditional 3G / 4G / 5G signal sources (RRU), combiners (POI), passive devices (couplers, power dividers, etc.), feeders and antennas (indoor ceiling antennas or indoor directional antennas).

[0003] For the traditional indoor construction project composed of this traditional passive DAS system, the acceptance and optimization steps are generally: main equipment signal source opening and network access, indoor project performance testing, rectification after performance does not meet the standard, performance retest after rectification is completed, until the performance meets the acceptance specifications, it can be accepted. For this kind of traditional acceptance method for indoor construction projects, it must be carried out after the main equipment signal source is opened and connected to the network. If the signal source is not opened, the project cannot be accepted. After the signal source is opened, it also involves repeated project rectification, and the workload has not only doubled or tripled. The most important thing is that the long-term and repeated rectification work is also likely to cause dissatisfaction among owners, and the delivery cycle of the entire project is lengthened, resulting in delayed delivery of the project.

[0004] Moreover, the "formal acceptance" of the indoor construction project mainly includes the following acceptance contents:

[0005] 1. Conventional acceptance items, including: equipment installation inspection and acceptance, passive device installation specification acceptance, cable layout inspection and acceptance, power supply installation inspection and acceptance, auxiliary material engineering inspection and acceptance, label production and pasting specifications, etc.;

[0006] 2. Software acceptance items, including: network parameter planning consistency, software version consistency, network management connection function availability, equipment security, system configuration and parameters, network management connection and availability, etc.;

[0007] 3. Service performance acceptance items include: wireless signal coverage, wireless signal quality (RSRP, SINR, etc.), edge field strength signal detection, uplink and downlink balance detection, voice and data service availability, voice and data service performance, data service throughput, upload and download rates, etc.

[0008] Therefore, according to the conventional project acceptance method, before the main equipment signal source (such as BBU+RRU) is opened, the above acceptance project contents cannot be fully carried out for acceptance testing, resulting in the inability to quickly discover problems and make corrections.

[0009] Therefore, a new type of technical means is urgently needed to carry out "pre-acceptance" of indoor distribution projects in advance, so as to facilitate the acceptance inspection of the above three major projects. That is, through the "pre-acceptance" work, some of the acceptance work involved in the "formal acceptance" can be advanced, and some engineering construction problems can be discovered in advance, especially those related to the performance of wireless signal coverage, so that after the problems are discovered, they can be rectified and optimized as soon as possible.

[0010] Chinese patent publication number CN109660307B discloses a portable indoor distribution acceptance and inspection method and system, which feeds the RFID signal into the indoor distribution network by configuring the RFID signal source and adding a combiner that integrates "traditional indoor distribution signal frequency + RFID signal frequency band", and calculates the feeder loss and space loss of the indoor distribution system, checks the link line loss indoor distribution information through the mobile terminal, analyzes the integrity of the number of read tags and the link status, and checks the working status of the RFID portable terminal; the supervision cloud platform analyzes the aging degree of the link according to the trend of the line loss indoor distribution information, and selects the corresponding alarm strategy according to the indoor distribution line loss value. This method adopts the simulation method of the RFID signal source, and can only obtain parameter information of the indoor distribution network such as standing wave ratio and line loss, but cannot obtain network parameters such as wireless signal coverage, wireless signal quality (RSRP, SINR, etc.), edge field strength signal detection, and uplink and downlink balance detection. This method has a very limited effect on indoor distribution acceptance. Summary of the invention

[0011] In view of the deficiencies in the prior art, the present invention proposes a system, method and storage medium for indoor signal detection in pre-acceptance of indoor distributed projects, which are applied after the indoor distributed construction is completed and before the main equipment is in place or in place but not opened to the network (before the main equipment is opened), and can obtain network parameters such as wireless signal coverage range, wireless signal quality, edge field strength signal detection, uplink and downlink balance detection, etc., which can assist in the formal acceptance of indoor distributed construction projects in all aspects.

[0012] The technical solution of the present invention is achieved in this way:

[0013] On the one hand, the present invention provides a room signal detection system for room engineering pre-acceptance, comprising:

[0014] The analog signal source subsystem is used to input the signal source of the simulated real base station signal to the passive indoor DAS subsystem;

[0015] The front-end detection subsystem includes an indoor signal detection platform and a wireless signal detector. The wireless signal detector is installed near each passive indoor antenna, and is used to receive the signal of the corresponding passive indoor antenna and perform signal analysis and processing to obtain signal measurement information of the baseband signal; it is also used to make a signal quality judgment based on the signal measurement information, and the signal quality judgment content includes but is not limited to wireless signal coverage, wireless signal quality, and edge field strength signal detection; the wireless signal detector is also used to perform relevant quality performance tests on the passive indoor antenna, and the relevant quality performance tests include uplink and downlink link balance detection and CQT test;

[0016] Wireless signal detectors can be fixed or handheld. Fixed ones are installed near each passive indoor antenna; handheld ones are portable and can be deployed at a suitable location as required according to the detection requirements.

[0017] The indoor signal detection platform is used to receive the signal quality judgment results and related quality performance tests of the wireless signal detector and perform data analysis, and to form corresponding alarm information and / or decision instructions; it is also used to send the decision instructions to the corresponding wireless signal detector for execution and processing.

[0018] Preferably, the wireless signal detector includes a signal receiver, a signal determiner, an automatic dialing unit, a signal return unit and a power supply unit, wherein

[0019] The power supply unit is used to supply power to the signal receiver, the signal determiner, and the signal feedback unit;

[0020] The signal receiver is used to receive the radio frequency signals sent by the indoor antenna in the full frequency band and filter the signals outside the frequency band;

[0021] The signal determiner is used to process the radio frequency signal processed by the signal receiver to obtain signal measurement information of the baseband signal, and make a signal quality judgment based on the signal measurement information; the signal measurement information includes but is not limited to useful signal to interference signal ratio SINR, reference signal received power RSRP, reference signal received quality RSRQ, signal strength indication RSSI, signal frequency point information and signal frequency band information;

[0022] The automatic dialing unit is used to receive the decision instructions of the indoor signal detection platform to regularly carry out uplink and downlink link balance detection and CQT test, and report relevant test indicators to the indoor signal detection platform;

[0023] The signal feedback unit is used to send the signal quality judgment result and the different levels of alarm information to the network management platform through network transmission.

[0024] Preferably, the contents of the CQT test include but are not limited to reference signal coverage, indoor signal leakage manual control ratio, intra-system switching success rate, link layer block error rate, VoLTE quality, data rate, drop rate, access success rate and delay.

[0025] Preferably, the analog signal source subsystem may be a discrete device integrating the BBU and the RRU, or an integrated device integrating the core network, the BBU and the RRU.

[0026] Preferably, it also includes a mobile terminal, which is used to receive relevant information of the room signal detection platform and display relevant test results.

[0027] On the other hand, the present invention also provides a method for detecting room-divided signal during pre-acceptance of room-divided project, comprising the following steps:

[0028] The analog signal source subsystem simulates the signal source of the simulated real base station signal input to the passive indoor DAS subsystem, and inputs it into the passive indoor DAS subsystem to be accepted for engineering;

[0029] The wireless signal detectors installed near each passive indoor antenna receive the signal of the corresponding passive indoor antenna and perform signal analysis processing to obtain signal measurement information of the baseband signal, and perform signal quality judgment based on the signal measurement information, wherein the signal quality judgment content includes but is not limited to wireless signal coverage, wireless signal quality, and edge field strength signal detection;

[0030] Using a wireless signal detector to perform relevant quality performance tests on the passive indoor antenna, the relevant quality performance tests including uplink and downlink link balance detection and CQT test;

[0031] The indoor signal detection platform receives the signal quality judgment results and related quality performance tests of the wireless signal detector and performs data analysis, and forms corresponding alarm information and / or decision instructions.

[0032] Preferably, the contents of the CQT test include but are not limited to reference signal coverage, indoor signal leakage manual control ratio, intra-system switching success rate, link layer block error rate, VoLTE quality, data rate, drop rate, access success rate and delay.

[0033] On the other hand, a computer storage medium includes a computer program, and the computer program runs the above-mentioned indoor signal detection method for pre-acceptance of indoor engineering.

[0034] Compared with the prior art, the present invention has the following advantages: the indoor signal detection system for pre-acceptance of indoor distributed engineering of the present invention includes a simulation signal source subsystem for simulating a real base station signal source and a front-end detection subsystem for detection, wherein the front-end detection subsystem includes an indoor signal detection platform and a wireless signal detector, and by independently deploying the wireless signal detector near each passive indoor distributed antenna (such as about 10 cm away from each passive indoor distributed antenna), the indoor distributed engineering does not need to be modified, and the pre-acceptance work of the indoor distributed engineering can be completed in advance without introducing a new engineering construction point, effectively ensuring the matching degree of the actual indoor distributed construction and the design, and effectively ensuring that the pre-acceptance test is consistent with the actual acceptance test. Moreover, the present invention uses a wireless signal detector to detect the signal of the passive indoor distributed antenna. Compared with the simulation method using the RFID signal source, the present invention can obtain more signal measurement information of the passive indoor distributed antenna, and can obtain network parameters such as wireless signal coverage, wireless signal quality (RSRP, SINR, etc.), and edge field strength signal detection, and the pre-acceptance test is more consistent with the actual acceptance test. The present invention enables the pre-acceptance process to be carried out just after the project construction is completed, thereby reducing the difficulty of rectification, improving the acceptance efficiency, and “reducing costs and increasing efficiency”. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 This is the architecture diagram of the passive DAS system;

[0037] Figure 2 It is a structural block diagram of the indoor signal detection system for indoor project pre-acceptance of the present invention;

[0038] Figure 3 This is an application example diagram of the room signal detection system for room project pre-acceptance of the present invention;

[0039] Figure 4 is a structural block diagram of a wireless signal detector;

[0040] Figure 5 The present invention is a flow chart of the indoor signal detection method for indoor project pre-acceptance. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 2 The embodiment of the present invention discloses a room signal detection system for room engineering pre-acceptance, including:

[0043] The analog signal source subsystem is used to input a signal source simulating a real base station signal into the passive indoor DAS subsystem; the signal emitted by the analog signal source of the analog signal source subsystem is completely consistent with the RF characteristics (frequency band, frequency point, power, etc.) of the real commercial signal source.

[0044] The front-end detection subsystem includes an indoor signal detection platform and a wireless signal detector. The wireless signal detector is installed near each passive indoor antenna, and is used to receive the signal of the corresponding passive indoor antenna and perform signal analysis and processing to obtain signal measurement information of the baseband signal; it is also used to make a signal quality judgment based on the signal measurement information, and the signal quality judgment content includes but is not limited to wireless signal coverage, wireless signal quality, and edge field strength signal detection; the wireless signal detector is also used to perform relevant quality performance tests on the passive indoor antenna, and the relevant quality performance tests include uplink and downlink link balance detection and CQT test;

[0045] The indoor signal detection platform is used to receive the signal quality judgment results and related quality performance tests of the wireless signal detector and perform data analysis, and to form corresponding alarm information and / or decision instructions; it is also used to send the decision instructions to the corresponding wireless signal detector for execution and processing.

[0046] Specifically, the wireless signal detector includes a signal receiver, a signal determiner, an automatic dialing unit, a signal return unit and a power supply unit, wherein

[0047] The power supply unit is used to supply power to the signal receiver, signal decision device, and signal feedback unit, such as providing a stable 3.3V voltage and 10mA current, which can be repeatedly charged and used;

[0048] The signal receiver is used to receive the RF signals emitted by the indoor antenna in the full frequency band and filter the signals outside the frequency band; the signal receiver mainly receives the RF signals emitted by the traditional passive indoor antenna (such as mushroom head antenna or plate antenna, etc.). The signal receiver needs to receive the signals in the full frequency band, such as the signals with a bandwidth of 700MHz to 5000MHz, and perform appropriate filtering to filter the signals outside the frequency band.

[0049] The signal decider is used to process the RF signal after the signal receiver processes it, such as performing RF down-conversion, analog conversion, digital down-conversion, transmission protocol processing, and digital baseband demodulation processing to obtain the signal measurement information of the baseband signal, such as SINR (Signal to Interference plus Noise Ratio), RSRP (Reference Signal Receiving Power), RSRQ (Reference Signal Receiving Quality), RSSI (Received Signal Strength Indication), signal frequency information, signal frequency band information, PCI (Physical Cell Identifier), etc. Then, the signal quality judgment is made according to the signal measurement information;

[0050] The automatic dialing unit is used to receive the decision instructions of the indoor signal detection platform to regularly carry out uplink and downlink balance detection and CQT test, and report the relevant test indicators to the indoor signal detection platform; the automatic dialing unit is mainly used to realize the automated "call dialing quality test" CQT (Call Quality Test) and uplink and downlink balance detection, and the specific control and operation instructions come from the indoor signal detection platform. Among them, the CQT test is fully automated, and all test cases, test processes, test steps, judgment rules and judgment results are fully automated, and are controlled and batch processed by the indoor signal detection platform.

[0051] The signal feedback unit is used to send the signal quality judgment result and the different levels of alarm information to the network management platform through network transmission.

[0052] Among them, the signal return unit is equipped with the corresponding operator's SIM card, and can receive or transmit the operator's 4G / NB-IOT / 5G network signals, which can realize the sending and receiving of wireless signals. Specifically, 4G, NB-IOT or 5G network transmission is adopted, and the specific transmission network is adaptively selected in combination with different application scenarios and the strength of the network signal in the scenario. For example, in application scenarios with low signal transmission volume and low power consumption requirements, NB-IOT network can be preferred.

[0053] In the embodiment of the present invention, for the "passive indoor distributed DAS system" to be accepted and tested, at the input end of the passive indoor distributed DAS system, a signal source simulating a real base station signal is input through the analog signal source subsystem, thereby providing the passive indoor distributed DAS system with a signal that can provide normal services. At the same time, at the output end of the passive indoor distributed DAS system, a front-end detection subsystem supporting the automatic dialing function is configured. The front-end detection subsystem can obtain the frequency band, frequency point, RSRP, SINR and other parameter parameters of the wireless signal output by the DAS antenna, and can make signal quality judgments on the parameters such as the no-signal coverage range, wireless signal quality, and edge field strength signal of the passive indoor distributed antenna. Moreover, the wireless signal detector supports the automatic dialing function, and can perform relevant quality performance tests on the passive indoor distributed antenna, such as uplink and downlink balance detection, voice and data service availability, voice and data service performance, data service throughput, upload and download rates, etc. All aspects of the test. Through the indoor signal detection system for pre-acceptance of indoor distributed projects of the present invention, the indicators of the "passive indoor distributed DAS system" to be accepted can be fully tested and verified, problems in project construction can be discovered in advance, and timely rectification is facilitated, which can greatly improve the work efficiency of subsequent acceptance tests and speed up the acceptance process of the entire project construction.

[0054] Among them, Figure 3 As shown, the analog signal source subsystem is connected to the passive indoor DAS subsystem to provide a matching signal source for the passive indoor DAS subsystem. For example, if the passive indoor DAS subsystem is a coverage system of "China Mobile 1.8GHz (4G signal) + 2.3GHz (4G signal) + 2.6GHz (5G signal)", the analog signal source subsystem needs to provide a multi-mode signal source of China Mobile 1.8GHz (4G signal) + 2.3GHz (4G signal) + 2.6GHz (5G signal) to ensure that the passive indoor DAS subsystem can work according to customer requirements. This is also the prerequisite for conducting pre-acceptance work.

[0055] like Figure 3As shown, the passive indoor DAS subsystem and the front-end detection subsystem are connected in sequence. The front-end detection subsystem detects the signal of each antenna in the passive indoor DAS subsystem and performs an automated "call quality test" CQT (Call Quality Test). It can perform comprehensive tests on wireless signal coverage, wireless signal quality (RSRP, SINR, etc.), edge field strength signal detection, uplink and downlink link balance detection, etc. Furthermore, it can also perform comprehensive tests on voice and data service availability, voice and data service performance, data service throughput, upload and download rates, etc.

[0056] In order to more accurately test the performance of the passive indoor DAS subsystem, the analog signal source subsystem simulates the signal emitted by the signal source, and the frequency band, power level, number of carriers and other indicators are completely consistent with the actual commercial equipment of the operator. Each source device integrates the core network unit as required, such as China Mobile's 1.8GHz 4G source device, which integrates the 4G core network; 2.6GHz 5G source device, which integrates the 5G core network. This ensures that the analog signal source subsystem can provide complete source capabilities, so that the front-end detection subsystem can carry out comprehensive performance testing.

[0057] Furthermore, the implementation method of the specific equipment in the analog signal source subsystem can be a discrete device that integrates BBU (integrated core network) and RRU, or it can be an integrated device that integrates the core network, BBU and RRU, that is: a set of equipment that integrates the three network elements of the core network, BBU and RRU.

[0058] For the analog signal source subsystem, from the perspective of a unified platform, a unified signal source covering all operators, all standards, and all frequency bands can be used, including 4G core network, 5G core network, 4G BBU, 5G BBU, and 4G and 5G high-power RRU devices in all frequency bands. The core network can be independent, with separate BBU and RRU; or the core network can be independent, with BBU and RRU integrated; or the core network, BBU, and RRU are all integrated. Through software configuration, the frequency, power level, etc. of the signal source required by the site can be configured.

[0059] In specific applications, if the pre-acceptance indoor sub-project site covers the 4G and 5G signal coverage of China Mobile, China Telecom and China Unicom. For example, if the mobile 4G uses a 2*40W 1.8GHz signal source, the analog signal source can be selected as a 2*40W 1.8GHz integrated device that combines "core network + BBU + RRU". The mobile 5G uses a 2*100W 2.6GHz signal source, and the analog signal source can be selected as a 2*100W 2.6GHz integrated device that combines "core network + BBU + RRU". Telecom 4G and Unicom 4G use a co-built and shared 2*40W 1.8GHz signal source, and the analog signal source can be selected as a 2*40W 1.8GHz integrated device that combines "core network + BBU + RRU". Telecom 5G and Unicom 5G use a co-built and shared 2*60W 2.1GHz signal source. The analog signal source can be a 2*60W 2.1GHz integrated device that combines "core network + BBU + RRU". Each site is configured with analog signal source equipment of the corresponding frequency band and power level according to the user's pre-requirements.

[0060] In this embodiment, the wireless signal detector mainly receives signals from traditional passive indoor antennas (such as mushroom head antennas or plate antennas, etc.), parses and processes the signals, and judges the quality of the signals, wherein the signal quality judgment content includes but is not limited to wireless signal coverage, wireless signal quality (RSRP, SINR, etc.), and edge field strength signal detection. At the same time, it also has an automated "call dialing quality test" CQT test and uplink and downlink balance detection, and can further perform comprehensive tests on voice and data service availability, voice and data service performance, data service throughput, upload and download rates, etc.; and for the signal quality judgment result information and related quality performance test information detected by these wireless signal detectors, the wireless signal detector can be based on the operator's 4G / NB-IOT / 5G network and transmitted back to the indoor signal detection platform.

[0061] Among them, the operator's 4G / NB-IOT / 5G network, as a coverage network, mainly plays the role of a communication link. It mainly transmits the signal demodulation results of the wireless signal detector back to the indoor signal detection platform based on the operator's 4G / NB-IOT / 5G network. At the same time, some decision instructions of the indoor signal detection platform will also be transmitted to the wireless signal detector through the operator's 4G / NB-IOT / 5G network.

[0062] The indoor signal detection platform presents, analyzes and judges the signal judgment results, indoor DAS function and performance test results sent back by the wireless signal detector, and forms alarm information or decision instructions to facilitate on-site maintenance personnel to make decisions and rectify construction projects. At the same time, the indoor signal detection platform can remotely issue corresponding decision instructions to the wireless signal detector, which is executed and processed by the wireless signal detector to obtain corresponding detection results. For example, the CQT test of the wireless signal detector and the automatic dialing unit of the wireless signal detector receive instructions from the indoor signal detection platform, carry out CQT tests regularly, and report relevant test indicators to the indoor signal detection platform. The CQT test involves the RSRP, SINR, delay, uplink rate, downlink rate and other indicator parameter tests of the indoor DAS system. The specific control and operation instructions come from the indoor signal detection platform. The CQT test is fully automated. All test cases, test processes, test steps, judgment rules and output of judgment results are fully automated and are controlled and batch processed by the indoor signal detection platform.

[0063] In the embodiment of the present invention, further, the indoor signal detection system for indoor signal detection pre-acceptance of the indoor signal detection project also includes a mobile terminal, which is used to receive relevant information of the indoor signal detection platform and display relevant test results. Among them, the mobile terminal includes any one of APP, applet, etc., which is a mobile terminal tool implemented by APP or applet. After entering the relevant information of the wireless signal detector (such as the SN number of the wireless signal detector), site information (name, longitude and latitude information, etc.) and basic data of the antenna on the mobile terminal, the system topology diagram, RSRP / SINR signal quality of the antenna, PCI information, antenna alarm information, RSRP, SINR, delay and other indicator parameter test results related to the CQT test can be viewed on the mobile terminal, which is convenient for maintenance personnel to handle relevant alarm information and decision instructions.

[0064] Among them, since the CQT test involves the RSRP, SINR, latency, uplink rate, downlink rate and other indicator parameter tests of the indoor DAS system, the content of the CQT test includes but is not limited to the reference signal coverage, the proportion of manual control of indoor signal leakage, the success rate of switching within the system, the link layer block error rate, VoLTE (Voice over Long-Term Evolution) quality, data rate, drop rate, access success rate and latency.

[0065] Taking 4G as an example, as shown in the following table, the key indicators involved in CQT testing are as follows:

[0066]

[0067] During the CQT test of the corresponding indicators, the formula To calculate the TD-LTE (Time Division Long Term Evolution) reference signal coverage in general places; and according to the formula The TD-LTE (Time Division Long Term Evolution) reference signal coverage rate is calculated for important locations. When the percentage of the calculated processing is greater than 95%, it proves that the TD-LTE (Time Division Long Term Evolution) reference signal coverage rate meets the standard.

[0068] As for the controlled ratio of TD-LTE indoor signal leakage, the main test is whether the proportion of sampling points where the indoor signal leaks to 10 meters outdoors and the signal strength is 10dB lower than the outdoor main cell (or signal strength ≤-110dBm) is greater than 95%. If so, it means that the controlled ratio of TD-LTE indoor signal leakage meets the acceptance requirements.

[0069] The handover success rate within the TD-LTE system is calculated by calculating the number of successful handovers within the TD-LTE network / the number of handover attempts within the TD-LTE network × 100%. If it is greater than 98%, it means that the handover success rate within the TD-LTE system meets the requirements.

[0070] The transmission efficiency of the application layer of TD-LTE services is calculated by: average rate of file transmission at the application layer / theoretical rate under specific bandwidth, time slot and terminal type configuration × 100%. If it is greater than 60%, it means that the transmission efficiency of the application layer of TD-LTE services meets the standard.

[0071] For the test of the average rate of the TD-LTE service application layer, it is necessary to first configure the E band, 20M bandwidth, uplink and downlink subframes in 1:3, special time slots in 10:2:2, and the typical configuration of 2T2R as shown in the table above, and then test whether the average rate of the TD-LTE service application layer meets the requirements.

[0072] The TD-LTE link layer block error rate is calculated by: number of TD-LTE link layer error blocks / total number of TD-LTE link layer blocks × 100%, and whether it is less than 10%, if so, it meets the requirements.

[0073] During the CQT test, the above indicators are continuously tested to determine whether each indicator meets the corresponding requirements.

[0074] In addition, taking 4G and 5G as examples, the method of network access testing in CQT testing includes the following steps:

[0075] Step s1, in an unloaded or lightly loaded network, RSRP ≥ -110dBm and SINR ≥ 3dB;

[0076] Step s2, the wireless signal detector automatically performs an Attach test;

[0077] Step s3: perform at least 10 tests and report the test results to the indoor signal detection platform for automatic system judgment or manual judgment.

[0078] In addition, the method for access rate testing in the CQT test includes the following steps:

[0079] Step s1: In SA networking environment, the network turns off the traffic diversion function;

[0080] Step s2, placing a wireless signal detector at a predetermined test point;

[0081] Step s3: The wireless signal detector automatically performs full-buffer downlink TCP service, maintains the preset time (such as more than 30 seconds) after stabilization, and records the L2 throughput; records the L2 throughput as well as RSRP (Reference Signal Receiving Power), CQI (Channel Quality Indicator), SINR (Signal to Interference plus Noise Ratio), MCS (Modulation and Coding Scheme), and MIMO (Multiple-Input Multiple-Output);

[0082] Step s4, the wireless signal detector performs full buffer uplink TCP service and repeats step s3;

[0083] Step s5, report the test results to the indoor signal detection platform for automatic judgment by the system or manual judgment.

[0084] In CQT testing, the delay test method is:

[0085] Step s1: After the wireless signal detector is at the best coverage point, it initiates 32 Bytes and 1400 Bytes ping packets respectively, and repeats ping 30 times;

[0086] Step s2, repeating step s1 after the wireless signal detector is at a good coverage point, a mid-point, and a poor coverage point respectively;

[0087] Step s3, report the test results to the indoor signal detection platform for automatic judgment by the system or manual judgment.

[0088] The definitions of 5G network signal coverage for the test location are as follows:

[0089] (1) Excellent point: SS-RSRP ≥ -75dBm and SS-SINR ≥ 25dB;

[0090] (2) Better: -85dBm ≦ SS-RSRP < -75dBm and 15dB ≦ SS-SINR < 20dB;

[0091] (3) Midpoint: -95dBm ≤ SS-RSRP < -85dBm and 5dB ≤ SS-SINR < 10dB;

[0092] (4) Difference: -105dBm ≦ SS-RSRP < -95dBm and -5dB ≦ SS-SINR < 0dB.

[0093] After determining the corresponding positions of the excellent, good, medium and poor signal coverage points through the detected parameters, the wireless signal detectors are placed in the corresponding positions respectively, and the delay test in the CQT test is carried out.

[0094] The present invention configures the analog signal source subsystem and combines the front-end detection subsystem to conduct simulation tests on the passive indoor DAS subsystem to be accepted, and performs functions and performance acceptance, including but not limited to: wireless signal coverage, wireless signal quality (RSRP, SINR, etc.), edge field strength signal detection, uplink and downlink balance detection, voice and data service availability, voice and data service performance, data service throughput, upload and download rates, etc. At the same time, combined with some special requirements in project acceptance (such as: the combination of road test data and CAD point map of indoor DAS project), the software can be upgraded in the front-end detection subsystem, and the test case library can be further improved.

[0095] The indoor signal detection system for pre-acceptance of indoor distributed projects of the present invention can carry out "pre-acceptance" of indoor distributed projects in advance. Through the "pre-acceptance" work, some work of "formal acceptance" can be advanced, and some problems in engineering construction can be discovered in advance and rectified and optimized, especially performance problems related to wireless signal coverage in business performance acceptance projects, which can greatly speed up the subsequent formal acceptance of the project.

[0096] On the other hand, the present invention also provides a method for detecting room-divided signal during pre-acceptance of room-divided project, comprising the following steps:

[0097] Step 1, a signal source simulating a real base station signal input into the passive indoor DAS subsystem is simulated by a simulation signal source subsystem, and the signal source is input into the passive indoor DAS subsystem to be accepted for engineering;

[0098] Step 2, receiving the signal of the corresponding passive indoor antenna through a wireless signal detector installed near each passive indoor antenna and performing signal analysis processing to obtain signal measurement information of the baseband signal, and performing signal quality judgment based on the signal measurement information, wherein the signal quality judgment content includes but is not limited to wireless signal coverage, wireless signal quality, and edge field strength signal detection;

[0099] Step 3, using a wireless signal detector to perform relevant quality performance tests on the passive indoor antenna, wherein the relevant quality performance tests include uplink and downlink link balance detection and CQT test;

[0100] Step 4: Receive the signal quality judgment result and related quality performance test of the wireless signal detector through the indoor signal detection platform, perform data analysis, and form corresponding alarm information and / or decision instructions.

[0101] The contents of the CQT test include but are not limited to reference signal coverage, indoor signal leakage manual control ratio, intra-system switching success rate, link layer block error rate, VoLTE quality, data rate, drop rate, access success rate and latency.

[0102] The present invention independently deploys the wireless signal detector at a certain distance (such as about 10 cm) from the passive indoor antenna at the end of the interval. There is no need to modify the indoor project or introduce new engineering construction points, and the pre-acceptance work of the indoor project can be completed in advance, effectively ensuring the matching degree between the actual indoor construction and the design, and the pre-acceptance test is more consistent with the actual acceptance test.

[0103] Compared with the simulation method of RFID signal source used in the prior art, the present invention can not only obtain more parameter information of indoor network such as line loss, but also obtain network parameters such as wireless signal coverage, wireless signal quality (RSRP, SINR, etc.), edge field strength signal detection, uplink and downlink balance detection, voice and data service availability, voice and data service performance, data service throughput, upload and download rates; the simulation method of RFID signal source has a limited effect on indoor acceptance, while the method of the present invention is basically the same as the actual base station signal source, and the pre-acceptance test is more consistent with the actual acceptance test.

[0104] The present invention can be carried out in the pre-acceptance process just after the project construction is completed, which reduces the difficulty of rectification, improves the acceptance efficiency, and “reduces costs and increases efficiency”.

[0105] On the other hand, a computer storage medium includes a computer program, and the computer program runs the above-mentioned indoor signal detection method for pre-acceptance of indoor engineering.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A room signal detection system for room project pre-acceptance, characterized in that: include: The analog signal source subsystem is used to input the signal source simulating the real base station signal to the passive indoor DAS subsystem; The front-end detection subsystem includes an indoor signal detection platform and a wireless signal detector. The wireless signal detector is installed near each passive indoor antenna, and is used to receive the signal of the corresponding passive indoor antenna and perform signal analysis and processing to obtain signal measurement information of the baseband signal; it is also used to make a signal quality judgment based on the signal measurement information, and the signal quality judgment content includes but is not limited to wireless signal coverage, wireless signal quality, and edge field strength signal detection; the wireless signal detector is also used to perform relevant quality performance tests on the passive indoor antenna, and the relevant quality performance tests include uplink and downlink link balance detection and CQT test; The indoor signal detection platform is used to receive the signal quality judgment results and related quality performance tests of the wireless signal detector and perform data analysis, and to form corresponding alarm information and / or decision instructions; it is also used to send the decision instructions to the corresponding wireless signal detector for execution and processing.

2. According to the indoor signal detection system for indoor project pre-acceptance according to claim 1, it is characterized in that: The wireless signal detector can be fixed or handheld, and includes a signal receiver, a signal determiner, an automatic dialing unit, a signal return unit, and a power supply unit. The power supply unit is used to supply power to the signal receiver, the signal determiner, and the signal feedback unit; The signal receiver is used to receive the radio frequency signals sent by the indoor antenna in the full frequency band and filter the signals outside the frequency band; The signal determiner is used to process the radio frequency signal processed by the signal receiver to obtain signal measurement information of the baseband signal, and make a signal quality judgment based on the signal measurement information; the signal measurement information includes but is not limited to useful signal to interference signal ratio SINR, reference signal received power RSRP, reference signal received quality RSRQ, signal strength indication RSSI, signal frequency point information and signal frequency band information; The automatic dialing unit is used to receive the decision instructions of the indoor signal detection platform to regularly carry out uplink and downlink link balance detection and CQT test, and report relevant test indicators to the indoor signal detection platform; The signal feedback unit is used to send the signal quality judgment result and the different levels of alarm information to the network management platform through network transmission.

3. According to claim 1, the room signal detection system for room project pre-acceptance is characterized in that: The contents of the CQT test include but are not limited to reference signal coverage, indoor signal leakage manual control ratio, intra-system switching success rate, link layer block error rate, VoLTE quality, data rate, call drop rate, access success rate and latency.

4. According to claim 1, the room signal detection system for room project pre-acceptance is characterized in that: The analog signal source subsystem may be a discrete device integrating the BBU and the RRU, or an integrated device integrating the core network, the BBU and the RRU.

5. According to claim 1, the room signal detection system for room project pre-acceptance is characterized in that: It also includes a mobile terminal, which is used to receive relevant information of the room signal detection platform and display relevant test results.

6. A method for detecting room signal for room division project pre-acceptance, characterized in that: The following steps are involved: The analog signal source subsystem simulates the signal source of the simulated real base station signal input to the passive indoor DAS subsystem, and inputs it into the passive indoor DAS subsystem to be accepted for engineering; The wireless signal detectors installed near each passive indoor antenna receive the signal of the corresponding passive indoor antenna and perform signal analysis processing to obtain signal measurement information of the baseband signal, and perform signal quality judgment based on the signal measurement information, wherein the signal quality judgment content includes but is not limited to wireless signal coverage, wireless signal quality, and edge field strength signal detection; Using a wireless signal detector to perform relevant quality performance tests on the passive indoor antenna, the relevant quality performance tests including uplink and downlink link balance detection and CQT test; The indoor signal detection platform receives the signal quality judgment results and related quality performance tests of the wireless signal detector and performs data analysis, and forms corresponding alarm information and / or decision instructions.

7. The indoor signal detection method for indoor project pre-acceptance according to claim 6 is characterized in that: The contents of the CQT test include but are not limited to reference signal coverage, indoor signal leakage manual control ratio, intra-system switching success rate, link layer block error rate, VoLTE quality, data rate, call drop rate, access success rate and latency.

8. A computer storage medium, comprising a computer program, wherein the computer program runs the indoor signal detection method for indoor project pre-acceptance as described in any one of claims 6 to 7.

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