CN111225407B - Detection apparatus for NB-IoT terminal - Google Patents
Detection apparatus for NB-IoT terminal Download PDFInfo
- Publication number
- CN111225407B CN111225407B CN201811426229.6A CN201811426229A CN111225407B CN 111225407 B CN111225407 B CN 111225407B CN 201811426229 A CN201811426229 A CN 201811426229A CN 111225407 B CN111225407 B CN 111225407B
- Authority
- CN
- China
- Prior art keywords
- iot
- terminal
- base station
- test base
- iot test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 37
- 238000012360 testing method Methods 0.000 claims abstract description 228
- 238000009434 installation Methods 0.000 claims abstract description 65
- 238000004891 communication Methods 0.000 claims abstract description 11
- 230000035945 sensitivity Effects 0.000 claims description 38
- 230000008054 signal transmission Effects 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 9
- 230000004069 differentiation Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0677—Localisation of faults
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The embodiment of the invention provides a detection device of an NB-IoT terminal, wherein an NB-IoT test terminal and an NB-IoT test base station in the detection device are both connected with a microcomputer controller; when the installed NB-IoT fault terminal is detected, the microcomputer controller measures the network coverage signal intensity of the installation position of the installed NB-IoT fault terminal through an NB-IoT test terminal with a communication function; the method comprises the steps of guiding signals emitted by an NB-IoT test base station to an installation position, detecting whether the NB-IoT test base station receives a random access request message of an installed NB-IoT fault terminal through a microcomputer controller to obtain a detection result, and determining a fault reason of the installed NB-IoT fault terminal according to the obtained network coverage signal strength and the detection result. The embodiment of the invention realizes the differentiation of the network fault problem and the terminal fault problem and reduces the maintenance difficulty.
Description
Technical Field
The embodiment of the invention relates to the technical field of narrowband Internet of things, in particular to a detection device for an NB-IoT terminal.
Background
A narrowband Band Internet of Things (NB-IoT) technology is one of Internet of Things technologies, belongs to a Wide Area Low Power Area (LPWA) technology, and is a wireless bearer network for developing Internet of Things services.
The NB-IoT terminal is a terminal which adds an NB-IoT module (responsible for communication) on equipment to be monitored, for example, various terminals which are formed by integrating the NB-IoT module and the monitored equipment and show various industrial characteristics, such as a meter, a smoke detector, a fire extinguisher, a garbage can, a tracker, wearable equipment and the like. At present, the quality judgment of the NB-IoT terminal is based on product quality certificates, but at the initial stage of current service development and the initial stage of product scale commercial marketing, the yield of the NB-IoT terminal is not satisfactory, the sensitivity difference of communication signals of products in the same batch is very large, and some products which do not reach the standard are marketed, and in addition, the user has insufficient knowledge of the quality problem of the terminal, so that the individual NB-IoT terminal is unavailable after being installed, and further, the service opening success rate of the NB-IoT terminal after being installed is low. In addition, because the placement position of the NB-IOT terminal is not maintained, and a user lacks an effective detection tool, available information is less, so that when the NB-IOT terminal cannot be used normally and a manufacturer is asked to troubleshoot problems by operation and maintenance personnel, long time and labor are consumed, and the internal resource overhead is large.
In summary, the problems of low service opening rate and high maintenance cost of the NB-IOT terminal after installation exist in the prior art.
Disclosure of Invention
The embodiment of the invention provides a detection device of an NB-IOT terminal, which aims to solve the problems of low service opening rate and high maintenance cost of the NB-IOT terminal after installation in the prior art.
In order to solve the above problem, an embodiment of the present invention provides a detection apparatus for an NB-IOT terminal, where the detection apparatus includes:
the system comprises a microcomputer controller, a narrowband Internet of things NB-IoT test terminal with a communication function and an NB-IoT test base station with adjustable signal emission power, wherein the NB-IoT test terminal and the NB-IoT test base station are both connected with the microcomputer controller; wherein,
when an installed NB-IoT fault terminal is detected, an Reference Signal Received Power (RSRP) value at an installation position of the installed NB-IoT fault terminal is measured through the NB-IoT test terminal, and when the NB-IoT test terminal sends the measured RSRP value to a microcomputer controller, the microcomputer controller obtains the network coverage signal strength at the installation position according to the received RSRP value;
stopping the RSRP measurement of the NB-IoT test station on the installation position, guiding signals emitted by the NB-IoT test base station to the installation position, setting TAC (cell tracking code) different from TAC (cell tracking code) of a current network at the installation position on the NB-IoT test base station through the microcomputer controller, adjusting the signal emission power of the NB-IoT test base station to a normal power value, detecting whether the NB-IoT test base station receives a random access request message of the installed NB-IoT fault terminal through the microcomputer controller at the moment to obtain a detection result, and determining a fault reason of the installed NB-IoT fault terminal according to the obtained network coverage signal strength and the detection result.
Optionally, when determining the failure cause of the installed NB-IoT faulty terminal according to the obtained network coverage signal strength and the detection result, when the network coverage signal strength is smaller than a preset threshold, determining that the failure cause of the installed NB-IoT faulty terminal includes a network failure cause; when the network coverage signal strength is greater than or equal to a preset threshold value, determining that the fault reason of the installed NB-IoT fault terminal is the terminal fault reason; and when the detection result is that the NB-IoT test base station receives the random access request message, determining that the installed NB-IoT fault terminal has a receiving sensitivity problem.
Optionally, the detection device further comprises a first signal switch, a second signal switch and a shielding box for shielding external signals; a first end of the first signal switcher is connected with the NB-IoT test terminal, a second end of the first signal switcher is connected with an antenna interface of the NB-IoT test terminal, a third end of the first signal switcher is connected with a receiving antenna, and the receiving antenna is arranged in the shielding box; a first end of the second signal switcher is connected with the NB-IoT test base station, a second end of the second signal switcher is connected with an antenna interface of the NB-IoT test base station, a third end of the second signal switcher is connected with a transmitting antenna, and the transmitting antenna is arranged in the shielding box; when the installed NB-IoT fault terminal is detected, connecting the first end and the second end of the first signal switch so that the NB-IoT test terminal measures the RSRP value at the installation position through an antenna interface of the NB-IoT test terminal; and when the microcomputer controller obtains the network coverage signal strength at the installation position, disconnecting the first end and the second end of the first signal switcher and communicating the first end and the second end of the second signal switcher, so that the NB-IoT test base station guides the transmission signal to the installation position through the antenna interface of the NB-IoT test base station.
Optionally, a link loss compensation amplifier is connected between the second end of the first signal switch and the antenna interface of the NB-IoT test terminal; wherein the link loss compensation amplifier is activated when the NB-IoT test terminal does not measure the RSRP value at the installation location, such that the signal strength directed to the NB-IoT test terminal through the antenna interface of the NB-IoT test terminal is higher than the reception sensitivity of the NB-IoT test terminal.
Optionally, when detecting an NB-IoT terminal to be installed, communicating the first end and the second end of the first signal switch, so that the NB-IoT test terminal measures an RSRP value at a position to be installed of the NB-IoT terminal to be installed through an antenna interface of the NB-IoT test terminal, and when the NB-IoT test terminal sends the measured RSRP value at the position to be installed to the microcomputer controller, the microcomputer controller obtains a network coverage signal strength at the position to be installed according to the received RSRP value; and placing the NB-IoT terminal to be installed in the shielding box, communicating the first end and the third end of the second signal switcher, disconnecting the first end and the second end of the first signal switcher, and communicating the first end and the third end of the first signal switcher, so that the microcomputer controller acquires the receiving sensitivity of the NB-IoT terminal to be installed through the NB-IoT test base station and the NB-IoT test terminal, and detects whether the NB-IoT terminal to be installed is an available terminal according to the network coverage signal strength at the position to be installed and the receiving sensitivity of the NB-IoT terminal to be installed.
Optionally, when the microcomputer controller obtains the receiving sensitivity of the NB-IoT terminal to be installed through the NB-IoT test base station and the NB-IoT test terminal, the microcomputer controller controls to adjust the signal transmission power of the NB-IoT test base station to a second target power value based on the first target power value, at this time, the NB-IoT test terminal measures the RSRP value in the shielding box, and sends the measured RSRP value in the shielding box to the microcomputer controller as the receiving sensitivity of the NB-IoT test terminal; the first target power value is a maximum signal transmission power value corresponding to the situation that the NB-IoT test base station cannot receive the random access message sent by the NB-IoT terminal to be installed when being started, and the NB-IoT test base station can receive the random access request message sent by the NB-IoT terminal to be installed when being started when the signal transmission power of the NB-IoT test base station is a second target power value.
Optionally, when the microcomputer controller controls to adjust the signal transmission power of the NB-IoT test base station to a second target power value based on a first target power value, the microcomputer controller controls to adjust the signal transmission power of the NB-IoT test base station to the first target power value, and controls the NB-IoT test base station to increase a preset power value once every preset time interval based on the first target power value, where the number of increases of the preset power value is a preset number, and at this time, the microcomputer controller detects whether the NB-IoT test base station receives a random access request message sent by the NB-IoT terminal to be installed when the NB-IoT test base station increases the preset power value each time; when it is detected that the NB-IoT test base station receives the random access request message sent by the NB-IoT terminal to be installed, recording power values at corresponding moments, and determining an average value of all the recorded power values as the second target power value.
Optionally, when it is detected that the NB-IoT test base station cannot receive a random access request message sent by the NB-IoT terminal to be installed each time the NB-IoT test base station increases a preset power value, determining the NB-IoT terminal to be installed as a suspected unavailable terminal; at the moment, the microcomputer controller controls and adjusts the signal emission power of the NB-IoT test base station to be a normal power value, and the microcomputer controller detects whether the NB-IoT test base station receives a random access request message sent by the NB-IoT terminal to be installed; when the signal transmitting power of the NB-IoT test base station is detected to be a normal power value, the NB-IoT test base station receives a random access request message sent by the NB-IoT terminal to be installed, and the NB-IoT terminal to be installed is determined to be an unavailable terminal.
Optionally, when detecting whether the NB-IoT terminal to be installed is an available terminal according to the network coverage signal strength at the location to be installed and the receiving sensitivity of the NB-IoT terminal to be installed, determining the NB-IoT terminal to be installed as an available terminal when detecting that the receiving sensitivity of the NB-IoT terminal to be installed is lower than the network coverage signal strength; when the receiving sensitivity of the to-be-installed NB-IoT terminal is detected to be higher than or equal to the network coverage signal strength, determining the to-be-installed NB-IoT terminal as an unavailable terminal.
The detection device of the NB-IoT terminal provided by the embodiment of the invention comprises an NB-IoT test terminal with a communication function, an NB-IoT test base station with adjustable signal emission power and a microcomputer controller, wherein the NB-IoT test terminal and the NB-IoT test base station are both connected with the microcomputer controller, so that when the NB-IoT fault terminal is detected on site, the network coverage signal strength at the installation position can be measured through the NB-IoT test terminal, namely whether the network at the installation position has a problem or not is detected, and when the NB-IoT test base station produces a base station signal with adjustable strength at the installation position, whether the NB-IoT test base station receives a random access request message sent by the installed NB-IoT fault terminal or not is detected, namely whether the receiving sensitivity of the installed NB-IoT fault terminal has a problem or not is detected, therefore, the network coverage signal strength detection at the installation position and the sensitivity detection of the installed NB-IoT fault terminal are realized, the network fault problem and the fault terminal problem are effectively distinguished, the fault analysis and judgment difficulty of fault analysis is reduced, the workload of operators and the maintenance personnel of the IoT terminal is reduced, and the maintenance cost of the NB-IoT terminal is further reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 shows one of block diagrams of a detecting apparatus of an NB-IoT terminal in an embodiment of the present invention;
fig. 2 shows a second block diagram of a detecting apparatus for NB-IoT terminals according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, which is one of block diagrams of a detection apparatus of an NB-IoT terminal in an embodiment of the present invention, the detection apparatus includes:
the system comprises a microcomputer controller 1, a narrow-band internet of things NB-IoT test terminal 2 with a communication function and an NB-IoT test base station 3 with adjustable signal emission power, wherein the NB-IoT test terminal 2 and the NB-IoT test base station 3 are both connected with the microcomputer controller 1; wherein,
when an installed NB-IoT fault terminal is detected, a Reference Signal Received Power (RSRP) value at an installation position of the installed NB-IoT fault terminal is measured through the NB-IoT test terminal 2, and when the NB-IoT test terminal 2 sends the measured RSRP value to the microcomputer controller 1, the microcomputer controller 1 obtains the network coverage signal strength at the installation position according to the received RSRP value;
stopping the NB-IoT test terminal 2 from measuring the RSRP at the installation position, guiding the signals emitted by the NB-IoT test base station 3 to the installation position, setting TAC (cell tracking code) different from the TAC of the current network at the installation position for the NB-IoT test base station 3 through the microcomputer controller 1, adjusting the signal emission power of the NB-IoT test base station 3 to a normal power value, detecting whether the NB-IoT test base station 3 receives the random access request message of the installed NB-IoT fault terminal through the microcomputer controller 1 at the moment to obtain a detection result, and determining the fault reason of the installed NB-IoT fault terminal according to the obtained network coverage signal strength and the detection result.
Specifically, the microcomputer controller 1 in this embodiment mainly refers to an embedded host, and may also be a portable computer, an intelligent terminal, and the like; in addition, in particular, the present embodiment may further configure the microcomputer controller 1 with a display, a touch screen, and a keyboard as a human-computer interaction input and output device, so that a user can view information sent by the NB-IoT test terminal and the NB-IoT test base station through the display. Certainly, in order to reduce the cost, the user can also realize human-computer interaction through the short-distance communication function and the microcomputer controller, wherein the short-distance communication function refers to the wireless communication functions such as bluetooth, wireless fidelity, zigBee and zwave.
In addition, specifically, the NB-IoT test terminal 2 has a communication function and is connected to the microcomputer controller 1, so that the problem that an ordinary NB-IoT terminal cannot feed back the measured RSRP can be solved, and thus, when the NB-IoT test terminal 2 measures the RSRP value at the installation position of the installed NB-IoT faulty terminal in the wireless environment where the installed NB-IoT faulty terminal is located, the measured RSRP value can be sent to the microcomputer controller 1, so that the microcomputer controller 1 can obtain the network coverage signal strength at the installation position according to the received RSRP value, and further, whether the fault cause of the installed NB-IoT faulty terminal is the network fault problem or not is positioned, and the distinction between the network problem and the terminal problem during problem analysis is realized.
Specifically, the NB-IoT test terminal may be a terminal produced by china mobile internet of things, may be implemented by matching an NB-IoT module with peripheral accessories, or may be a self-made chip, or the like.
Of course, it should be noted herein that the NB-IoT test terminal 2 is not faulty, and provides reference terminals for installed NB-IoT faulty terminals and other NB-IoT terminals that need to be detected, such as NB-IoT terminals to be installed.
In addition, specifically, the NB-IoT test base station 3 is configured to manufacture a base station signal with controllable signal strength, so as to detect service performance of the installed NB-IoT faulty terminal or other NB-IoT terminals to be installed that need to be detected under weak signals and strong signals, thereby obtaining reception sensitivity of the installed NB-IoT faulty terminal or other NB-IoT terminals to be installed that need to be detected by detection, and further realize positioning of terminal problems.
Specifically, the NB-IoT test base station has all NB-IoT air interface channels and channel configurations, and can be identified and reside by the NB-IoT terminal; furthermore, the NB-IoT test base station 3 supports attachment and access procedures on the S1 interface. Specifically, the NB-IoT test base station may be implemented by building the NB-IoT test base station through a set of chips (a baseband integrated circuit (BBIC) and a Radio Frequency Integrated Circuit (RFIC)), or by forming an open-source NB-IoT test base station through a computer (which may also be an intelligent terminal, an embedded terminal, or the like) that installs base station program software and a radio frequency (software radio) platform. Of course, the NB-IoT test base station may also be implemented in other software and hardware combination manners, which is not described herein again.
In addition, specifically, the microcomputer controller 1 and the NB-IoT test terminal 2, and the microcomputer controller 1 and the NB-IoT test base station 3 may be connected by cables, data lines, or wireless methods, and the wireless methods may include bluetooth, wireless fidelity, zigBee, zwave, and the like.
In this way, when detecting an installed NB-IoT faulty terminal, the present embodiment may first measure, through the NB-IoT test terminal 2, an RSRP value at an installation location of the installed NB-IoT faulty terminal. At this time, the RSRP value measured by the NB-IoT test terminal 2 is the RSRP value in the wireless environment where the NB-IoT faulty terminal is installed, so that when the NB-IoT test terminal 2 sends the measured RSRP value at the installation position to the microcomputer controller 1, the microcomputer controller 1 can obtain the network coverage signal strength at the installation position according to the received RSRP value, thereby positioning whether a network fault problem exists at the installation position, and further realizing the distinction between the network fault problem and the terminal fault problem. Of course, it should be noted here that when the network coverage signal strength at the installation location is obtained according to the RSRP value, the microcomputer controller 1 may filter and average the received RSRP value to obtain the network coverage signal strength at the installation location, may further use a maximum value of RSRP values sent by the NB-IoT test terminal for multiple times as the network coverage signal strength at the installation location, and may further use an average value of preset RSRP values that are ranked high when sorted according to size among the RSRP values sent by the NB-IoT test terminal for multiple times as the network coverage signal strength at the installation location.
In addition, specifically, after the network coverage signal strength at the installation position is obtained, that is, after the network problem is located, in order to detect whether a terminal problem, such as a reception sensitivity problem, exists in the installed NB-IoT faulty terminal, the NB-IoT test terminal 2 may stop measuring an RSRP value at the installation position, then direct the signal emitted by the NB-IoT test base station 3 to the installation position, and control, by the microcomputer controller 1, to set a TAC different from a TAC of a current network at the installation position to the NB-IoT test base station 3, and adjust the signal emission power of the NB-IoT test base station 3 to a normal power value, at this time, if the NB-IoT test base station 3 receives a random access Request "RRC Connection Request" message of the installed NB-IoT faulty terminal, the received random access Request message is sent to the microcomputer controller 1, so that it is possible to detect, by the microcomputer controller 1, whether the NB-IoT test base station 3 receives the random access Request message sent by the installed NB-IoT faulty terminal, and obtain a detection result, and then determine the reason for the installed NB-IoT faulty terminal according to the obtained network coverage signal strength and the detection result.
Specifically, when the normal power value of the signal transmission power is NB-IoT test base station 3 transmits a signal, the NB-IoT terminals without faults can access and attach to the normal power value, which may be-90 dBm, for example.
When the fault reason of the installed NB-IoT fault terminal is determined according to the obtained network coverage signal strength and the detection result, when the network coverage signal strength is smaller than a preset threshold value, the fault reason of the installed NB-IoT fault terminal is determined to comprise a network fault reason; when the network coverage signal strength is greater than or equal to a preset threshold value, determining that the fault reason of the installed NB-IoT fault terminal is the terminal fault reason; and when the detection result is that the NB-IoT test base station receives the random access request message, determining that the installed NB-IoT fault terminal has a receiving sensitivity problem.
Of course, when the NB-IoT test base station 3 does not receive the random access request sent by the installed NB-IoT faulty terminal as a result of the detection, it may be determined that the installed NB-IoT faulty terminal is suspected to have a power supply or service logic problem.
Further, it should be noted herein that the user may determine whether the installed NB-IoT faulty terminal has a problem in reception sensitivity by observing whether the random access request message is displayed on the display interface of the microcomputer controller 1.
Further, as shown in fig. 2, the detection apparatus further includes a first signal switcher 4, a second signal switcher 5, and a shielding box 6 for shielding an external signal; a first end of the first signal switch 4 is connected to the NB-IoT test terminal 2, a second end of the first signal switch 4 is connected to the antenna interface 21 of the NB-IoT test terminal 2, a third end of the first signal switch 4 is connected to a receiving antenna 7, and the receiving antenna 7 is disposed in the shielding box 6; a first end of the second signal switch 5 is connected to the NB-IoT test base station 3, a second end of the second signal switch 5 is connected to the antenna interface 31 of the NB-IoT test base station 3, a third end of the second signal switch 5 is connected to a transmitting antenna 8, and the transmitting antenna 8 is disposed in the shielding box 6; wherein,
when detecting the installed NB-IoT faulty terminal, connecting the first terminal and the second terminal of the first signal switch 4 to make the NB-IoT test terminal 2 measure the RSRP value at the installation location through the antenna interface 21 of the NB-IoT test terminal 2; and when the microcomputer controller 1 obtains the network coverage signal strength at the installation location, disconnecting the first terminal and the second terminal of the first signal switch 4, and connecting the first terminal and the second terminal of the second signal switch 5, so that the NB-IoT test base station 3 guides the transmission signal to the installation location through the antenna interface 31 of the NB-IoT test base station 3.
Specifically, the shielding box 6 enables the NB-IoT terminal to be installed in the shielding box 6 to receive only the signal transmitted by the NB-IoT test base station 3 directed into the shielding box 6, but not the existing network signal shielded outside the shielding box 6.
Specifically, when testing the installed NB-IoT faulty terminal, for convenience of testing, one end of an antenna may be placed at the installation location of the installed NB-IoT faulty terminal, and then the other end of the antenna is connected to the antenna interface 21 of the NB-IoT test terminal 2 through the feeder, so that when the first end and the second end of the first signal switch 4 are connected, the NB-IoT test terminal 2 can directly measure the RSRP value at the installation location. Certainly, in this embodiment, the microcomputer controller 1, the NB-IoT test terminal 2, the NB-IoT test base station 3, the shielding box 6 and other devices may be placed in a box, then an external post is disposed outside the box, and one end of the antenna is directly connected to the external post, and the antenna interface of the NB-IoT test terminal 2 is connected to the external post, so as to implement RSRP measurement of the NB-IoT test terminal 2 at the installation position.
In addition, specifically, after the microcomputer controller 1 obtains the network coverage signal strength at the installation location, in order to conveniently guide the signal of the NB-IoT test base station 3 to the installation location, the first terminal and the second terminal of the first signal switch 4 may be disconnected, that is, the NB-IoT test terminal 2 is disconnected from measuring RSRP at the installation location, and then the first terminal and the second terminal of the second signal switch 5 are connected, at this time, the transmission signal may be guided to the installation location through the antenna interface 31 of the NB-IoT test base station 3 connected to the second terminal of the second signal switch 5. Of course, in order to conveniently guide the signal to the installation location, one end of an antenna may be placed at the installation location where the NB-IoT fault terminal is installed, and then the other end of the antenna is connected to the antenna interface 31 of the NB-IoT test base station 3 through the feeder line, so as to guide the signal transmitted by the NB-IoT test base station 3 to the installation location, and further, when the signal transmission power of the NB-IoT test base station 3 is controlled through the microcomputer controller 1, whether the problem of receiving sensitivity exists in the installed NB-IoT fault terminal can be detected by detecting whether the random access request message of the installed NB-IoT fault terminal is received.
Furthermore, with continued reference to fig. 2, a link loss compensation amplifier 9 is connected between the second end of the first signal switcher 4 and the antenna interface 21 of the NB-IoT test terminal 2; wherein, when the NB-IoT test terminal 2 does not measure the RSRP value at the installation location, the link loss compensation amplifier 9 is activated to make the signal strength directed to the NB-IoT test terminal 2 through the antenna interface of the NB-IoT test terminal 2 higher than the reception sensitivity of the NB-IoT test terminal 2, thereby enabling the NB-IoT test terminal 2 to measure the RSRP value at the installation location.
Therefore, the network fault problem is positioned by testing the coverage signal strength of the installation position of the installed NB-IoT fault terminal, then the receiving sensitivity of the installed NB-IoT fault terminal is tested, and the terminal problem of the installed NB-IoT fault terminal is positioned, so that the network fault problem and the terminal fault problem are distinguished when the NB-IoT fault terminal is detected, the workload of maintenance personnel of operators is reduced, and the expenditure of internal resources is reduced.
Furthermore, when detecting an NB-IoT terminal to be installed, the first end and the second end of the first signal switch 4 are connected, so that the NB-IoT test terminal 2 measures an RSRP value at the position to be installed of the NB-IoT terminal to be installed through an antenna interface of the NB-IoT test terminal 2, and when the NB-IoT test terminal 2 sends the measured RSRP value at the position to be installed to the microcomputer controller 1, the microcomputer controller 1 obtains the network coverage signal strength at the position to be installed according to the received RSRP value; then, the NB-IoT terminal to be installed is placed in the shielding box 6, the first end and the third end of the second signal switch 5 are connected, the first end and the second end of the first signal switch 4 are disconnected, and the first end and the third end of the first signal switch 4 are connected, so that the microcomputer controller 1 can obtain the receiving sensitivity of the NB-IoT terminal to be installed through the NB-IoT test base station 3 and the NB-IoT test terminal 2, and detect whether the NB-IoT terminal to be installed is an available terminal according to the network coverage signal strength at the position to be installed and the receiving sensitivity of the NB-IoT terminal to be installed.
In this way, since the third terminal of the second signal switch 5 is connected to the transmitting antenna 8 disposed in the shielding box 6, after the first terminal and the third terminal of the second signal switch 5 are connected, the NB-IoT test base station 3 can guide the transmitted signal into the shielding box 6 through the transmitting antenna 8, thereby enabling the NB-IoT terminal to be installed to recognize and receive the signal transmitted by the NB-IoT test base station 3. In addition, specifically, since the third terminal of the first signal switch 4 is connected to the receiving antenna 7 disposed in the shielding box 6, after the first terminal and the third terminal of the first signal switch 4 are connected, the NB-IoT test base station 3 can obtain the RSRP value in the shielding box 6 through measurement by the receiving antenna 7.
Specifically, when it is detected that the receiving sensitivity of the to-be-installed NB-IoT terminal is lower than the network coverage signal strength, the to-be-installed NB-IoT terminal is determined as an available terminal; when the receiving sensitivity of the to-be-installed NB-IoT terminal is detected to be higher than or equal to the network coverage signal strength, determining the to-be-installed NB-IoT terminal as an unavailable terminal.
It should be noted that, the process of measuring the RSRP value at the to-be-installed position of the to-be-installed NB-IoT terminal by the NB-IoT test terminal 2 through the antenna interface of the NB-IoT test terminal 2 is the same as the process of measuring the RSRP value at the to-be-installed position of the installed NB-IoT faulty terminal by the NB-IoT test terminal 2, and details are not repeated here. In addition, the process of obtaining the network coverage signal strength at the to-be-installed position of the NB-IoT terminal to be installed by the microcomputer controller 1 according to the received RSRP value is the same as the process of obtaining the network coverage signal strength at the installation position of the installed NB-IoT faulty terminal by the microcomputer controller 1 according to the received RSRP value, and details are not repeated here.
Therefore, by testing the network coverage signal strength of the position to be installed of the NB-IoT terminal to be installed and the receiving sensitivity of the NB-IoT terminal to be installed, the characteristics that the quality of the NB-IoT terminal is difficult to control and the coverage signal of the placement position is difficult to predict are realized, and by selecting the appropriate NB-IoT terminal through field testing before installation, the service opening rate of the NB-IoT terminal is ensured, and the difficulty of later maintenance of the NB-IoT terminal is reduced.
In addition, when the microcomputer controller 1 acquires the receiving sensitivity of the NB-IoT terminal to be installed through the NB-IoT test base station 3 and the NB-IoT test terminal 2, the microcomputer controller 1 controls to adjust the signal transmission power of the NB-IoT test base station 3 to a second target power value with the first target power value as a reference, at this time, the NB-IoT test terminal 2 measures to obtain an RSRP value in the shielding box 6, and sends the measured RSRP value in the shielding box 6 to the microcomputer controller 1 as the receiving sensitivity of the NB-IoT test terminal 2; the first target power value is a maximum signal transmission power value corresponding to the NB-IoT test base station 3 that cannot receive the random access message sent by the NB-IoT terminal to be installed when the NB-IoT test base station is started, and the NB-IoT test base station 3 that can receive the random access request message sent by the NB-IoT terminal to be installed when the NB-IoT test base station 3 is started is a second target power value.
When the microcomputer controller 1 controls and adjusts the signal transmission power of the NB-IoT test base station 3 to be a second target power value based on the first target power value, the microcomputer controller 1 controls and adjusts the signal transmission power of the NB-IoT test base station 3 to be the first target power value, and controls the NB-IoT test base station 3 to increase a preset power value once every preset time interval based on the first target power value, wherein the number of increases of the preset power value is a preset number, and at this time, the microcomputer controller 1 detects whether the NB-IoT test base station 3 receives a random access request message sent by the NB-IoT terminal to be installed when the NB-IoT test base station 3 increases the preset power value each time; when it is detected that the NB-IoT test base station 3 receives the random access request message sent by the NB-IoT terminal to be installed, recording power values at corresponding times, and determining an average value of all the recorded power values as the second target power value.
Specifically, when the signal transmission Power of the NB-IoT test base station 3 is controlled and adjusted to be the first target Power value, the signal transmission Power of the NB-IoT test base station may be controlled and adjusted to be the minimum value (setting the signal transmission Power parameter nrs-Power-r 13), and then the microcomputer controller 1 detects whether the NB-IoT test base station receives the request message for random access sent by the terminal to be installed; at this time, if it is detected that the NB-IoT test base station 3 receives the random access request message, which indicates that the receiving sensitivity of the NB-IoT terminal to be installed, which is obtained by the test under this environment, is not the highest receiving sensitivity, that is, at this time, the signal transmitted by the NB-IoT test base station 3 is still too strong, at this time, the power supply of the NB-IoT test base station may be turned off, then an attenuator (for example, 20dB attenuator) is connected to the signal output terminal of the NB-IoT test base station, and the NB-IoT test base station is restarted, and it is repeatedly checked whether the NB-IoT test base station 3 receives the random access request message until it is detected that the NB-IoT test base station 3 cannot receive the random access request message.
In addition, specifically, the microcomputer controller 1 may automatically execute the control script to control the transmission signal power of the NB-IoT test base station to be increased by a preset power value (e.g., 2 dB) every preset time period, e.g., 15 s.
In addition, when detecting that the NB-IoT test base station 3 cannot receive the random access request message sent by the NB-IoT terminal to be installed each time the NB-IoT test base station 3 increases the preset power value, determining the NB-IoT terminal to be installed as a suspected unavailable terminal; at this time, the microcomputer controller 1 controls and adjusts the signal emission power of the NB-IoT test base station 3 to a normal power value, and detects whether the NB-IoT test base station 3 receives a random access request message sent by the NB-IoT terminal to be installed or not; when detecting that the signal transmission power at the NB-IoT test base station 3 is a normal power value, the NB-IoT test base station 3 receives the random access request message sent by the to-be-installed NB-IoT terminal, and determines the to-be-installed NB-IoT terminal as an unavailable terminal.
Therefore, by detecting the network coverage signal intensity of the position to be installed of the NB-IoT terminal to be installed and the receiving sensitivity of the NB-IoT terminal to be installed, the selection of the available NB-IoT terminal according to the scene on site before the installation of the NB-IoT terminal is realized, the service opening rate of the NB-IoT terminal to be installed after the installation is improved, the difficulty of the later maintenance of the NB-IoT terminal is reduced, and the workload of maintenance personnel of operators is reduced.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. An apparatus for detecting NB-IoT terminals, the apparatus comprising:
the system comprises a microcomputer controller, a narrow-band Internet of things NB-IoT test terminal with a communication function and an NB-IoT test base station with adjustable signal emission power, wherein the NB-IoT test terminal and the NB-IoT test base station are both connected with the microcomputer controller; wherein,
when an installed NB-IoT fault terminal is detected, a Reference Signal Received Power (RSRP) value at an installation position of the installed NB-IoT fault terminal is measured through the NB-IoT test terminal, and when the NB-IoT test terminal sends the measured RSRP value to a microcomputer controller, the microcomputer controller obtains the network coverage signal strength at the installation position according to the received RSRP value;
stopping RSRP measurement of the NB-IoT test terminal on the installation position, guiding signals emitted by the NB-IoT test base station to the installation position, setting TAC (random access control) different from a tracking area code TAC of a current network at the installation position on the NB-IoT test base station through the microcomputer controller, adjusting the signal emission power of the NB-IoT test base station to a normal power value, detecting whether the NB-IoT test base station receives a random access request message of the installed NB-IoT fault terminal through the microcomputer controller at the moment, obtaining a detection result, and determining a fault reason of the installed NB-IoT fault terminal according to the obtained network coverage signal strength and the detection result.
2. The apparatus according to claim 1, wherein when determining the failure cause of the installed NB-IoT failed terminal according to the obtained network coverage signal strength and the detection result,
when the network coverage signal strength is smaller than a preset threshold value, determining that the fault reason of the installed NB-IoT fault terminal comprises a network fault reason;
when the network coverage signal strength is greater than or equal to a preset threshold value, determining that the fault reason of the installed NB-IoT fault terminal is the terminal fault reason; and when the detection result is that the NB-IoT test base station receives the random access request message, determining that the installed NB-IoT fault terminal has a receiving sensitivity problem.
3. The sensing device of claim 1, further comprising a first signal switch, a second signal switch, and a shielding box for shielding an external signal; a first end of the first signal switcher is connected with the NB-IoT test terminal, a second end of the first signal switcher is connected with an antenna interface of the NB-IoT test terminal, a third end of the first signal switcher is connected with a receiving antenna, and the receiving antenna is arranged in the shielding box; a first end of the second signal switcher is connected with the NB-IoT test base station, a second end of the second signal switcher is connected with an antenna interface of the NB-IoT test base station, a third end of the second signal switcher is connected with a transmitting antenna, and the transmitting antenna is arranged in the shielding box; wherein,
when the installed NB-IoT fault terminal is detected, connecting the first end and the second end of the first signal switch so that the NB-IoT test terminal measures the RSRP value at the installation position through an antenna interface of the NB-IoT test terminal; and when the microcomputer controller obtains the network coverage signal strength at the installation position, disconnecting the first end and the second end of the first signal switcher and communicating the first end and the second end of the second signal switcher, so that the NB-IoT test base station guides the transmission signal to the installation position through the antenna interface of the NB-IoT test base station.
4. The detection apparatus of claim 3, wherein a link loss compensation amplifier is connected between the second end of the first signal switch and the antenna interface of the NB-IoT test terminal; wherein the link loss compensation amplifier is enabled when the NB-IoT test terminal does not measure the RSRP value at the installation location such that a signal strength directed to the NB-IoT test terminal through an antenna interface of the NB-IoT test terminal is higher than a receive sensitivity of the NB-IoT test terminal.
5. The detection device according to claim 3, wherein when detecting an NB-IoT terminal to be installed, the first terminal and the second terminal of the first signal switch are connected so that the NB-IoT test terminal measures an RSRP value at a position to be installed of the NB-IoT terminal to be installed through an antenna interface of the NB-IoT test terminal, and when the NB-IoT test terminal sends the measured RSRP value at the position to be installed to the microcomputer controller, the microcomputer controller obtains the network coverage signal strength at the position to be installed according to the received RSRP value;
and placing the NB-IoT terminal to be installed in the shielding box, communicating the first end and the third end of the second signal switcher, disconnecting the first end and the second end of the first signal switcher, and communicating the first end and the third end of the first signal switcher, so that the microcomputer controller acquires the receiving sensitivity of the NB-IoT terminal to be installed through the NB-IoT test base station and the NB-IoT test terminal, and detects whether the NB-IoT terminal to be installed is an available terminal according to the network coverage signal strength at the position to be installed and the receiving sensitivity of the NB-IoT terminal to be installed.
6. The detection apparatus according to claim 5, wherein when the microcomputer controller obtains the receiving sensitivity of the NB-IoT terminal to be installed through the NB-IoT test base station and the NB-IoT test terminal,
the microcomputer controller controls and adjusts the signal emission power of the NB-IoT test base station to be a second target power value taking the first target power value as a reference, at the moment, the NB-IoT test terminal measures the RSRP value in the shielding box, and the measured RSRP value in the shielding box is used as the receiving sensitivity of the NB-IoT test terminal to be sent to the microcomputer controller; wherein,
the first target power value is the maximum signal transmission power value corresponding to the condition that the NB-IoT test base station cannot receive the random access message sent by the NB-IoT terminal to be installed when being started, and the NB-IoT test base station can receive the random access request message sent by the NB-IoT terminal to be installed when being started when the signal transmission power of the NB-IoT test base station is the second target power value.
7. The detecting apparatus according to claim 6, wherein the microcomputer controller controls to adjust the signal transmission power of the NB-IoT test base station to a second target power value based on the first target power value,
the microcomputer controller controls and adjusts the signal emission power of the NB-IoT test base station to be a first target power value, controls the NB-IoT test base station to increase a preset power value once every other preset time interval by taking the first target power value as a reference, wherein the increase times of the preset power value are preset times, and detects whether the NB-IoT test base station receives a random access request message sent by the NB-IoT terminal to be installed or not when the NB-IoT test base station increases the preset power value every time through the microcomputer controller; wherein,
when detecting that the NB-IoT test base station receives the random access request message sent by the NB-IoT terminal to be installed, recording power values of corresponding moments, and determining an average value of all recorded power values as the second target power value.
8. The apparatus according to claim 7, wherein the NB-IoT terminal to be installed is determined as a suspected unavailable terminal when it is detected that the NB-IoT test base station cannot receive the random access request message sent by the NB-IoT terminal to be installed each time the NB-IoT test base station increases the preset power value; at the moment, the microcomputer controller controls and adjusts the signal emission power of the NB-IoT test base station to be a normal power value, and the microcomputer controller detects whether the NB-IoT test base station receives a random access request message sent by the NB-IoT terminal to be installed; wherein,
when the signal transmission power of the NB-IoT test base station is detected to be a normal power value, the NB-IoT test base station receives a random access request message sent by the NB-IoT terminal to be installed, and the NB-IoT terminal to be installed is determined to be an unavailable terminal.
9. The apparatus according to claim 5, wherein when detecting whether the NB-IoT terminal to be installed is an available terminal according to the network coverage signal strength at the location to be installed and the receiving sensitivity of the NB-IoT terminal to be installed,
when detecting that the receiving sensitivity of the NB-IoT terminal to be installed is lower than the network coverage signal strength, determining the NB-IoT terminal to be installed as an available terminal; when the receiving sensitivity of the NB-IoT terminal to be installed is detected to be higher than or equal to the network coverage signal strength, determining the NB-IoT terminal to be installed as an unavailable terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811426229.6A CN111225407B (en) | 2018-11-27 | 2018-11-27 | Detection apparatus for NB-IoT terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811426229.6A CN111225407B (en) | 2018-11-27 | 2018-11-27 | Detection apparatus for NB-IoT terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111225407A CN111225407A (en) | 2020-06-02 |
| CN111225407B true CN111225407B (en) | 2022-11-22 |
Family
ID=70826531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811426229.6A Active CN111225407B (en) | 2018-11-27 | 2018-11-27 | Detection apparatus for NB-IoT terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111225407B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111885678B (en) * | 2020-07-30 | 2022-09-27 | 广东小天才科技有限公司 | Data processing method, terminal device and medium for uplink exception |
| CN112505389B (en) * | 2020-12-11 | 2024-08-02 | 湖南常德牌水表制造有限公司 | NB acquisition terminal automatic checking device |
| CN118233941A (en) * | 2024-03-19 | 2024-06-21 | 深圳市十方运动科技有限公司 | Antenna detection-based method and system for enabling communication function of internet of things (IoT) module device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107708150A (en) * | 2017-11-24 | 2018-02-16 | 北京泰德东腾通信技术有限公司 | Arrowband internet-of-things terminal Non-Access Stratum authentication functions conformance test method and system |
| CN107769986A (en) * | 2016-08-15 | 2018-03-06 | 中国移动通信有限公司研究院 | A kind of network performance testing system, extension system and method for testing |
| CN108391280A (en) * | 2018-01-08 | 2018-08-10 | 东莞市慧眼数字技术有限公司 | Signal test system based on NB-IOT networks and method |
| CN108566647A (en) * | 2018-06-11 | 2018-09-21 | 东莞市慧眼数字技术有限公司 | Signal test system based on NB-IOT networks and method |
-
2018
- 2018-11-27 CN CN201811426229.6A patent/CN111225407B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769986A (en) * | 2016-08-15 | 2018-03-06 | 中国移动通信有限公司研究院 | A kind of network performance testing system, extension system and method for testing |
| CN107708150A (en) * | 2017-11-24 | 2018-02-16 | 北京泰德东腾通信技术有限公司 | Arrowband internet-of-things terminal Non-Access Stratum authentication functions conformance test method and system |
| CN108391280A (en) * | 2018-01-08 | 2018-08-10 | 东莞市慧眼数字技术有限公司 | Signal test system based on NB-IOT networks and method |
| CN108566647A (en) * | 2018-06-11 | 2018-09-21 | 东莞市慧眼数字技术有限公司 | Signal test system based on NB-IOT networks and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111225407A (en) | 2020-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| USRE48113E1 (en) | Systems and methods for adjusting system tests based on detected interference | |
| CN111225407B (en) | Detection apparatus for NB-IoT terminal | |
| KR100378613B1 (en) | Antenna and Feeder Cable Testing Apparatus and Method | |
| CN111225383B (en) | Method and device for testing NB-IoT terminal | |
| US20070258484A1 (en) | Network profiling system having physical layer test system | |
| US20090131043A1 (en) | Wireless communication system and test method thereof, and access terminal for testing wireless communication system | |
| US6151482A (en) | Operation and maintenance link for antenna equipment | |
| AU678528B2 (en) | Method for monitoring a radio receiver unit | |
| CA2050898A1 (en) | Base station transceiver diagnostics equipment | |
| US8885483B2 (en) | System and method for testing a data packet signal transceiver | |
| USRE49217E1 (en) | Monitoring system for a distributed antenna system | |
| CN113839712B (en) | Optical module-based signal transmission monitoring method, equipment, storage medium and device | |
| CN107682229A (en) | A kind of monitoring method of equipment, monitoring device and system | |
| CN104427601A (en) | Method and device for adjusting channel power in two-channel indoor distribution system | |
| CN109617625B (en) | Method for measuring distance between antennas | |
| US20090149173A1 (en) | Wireless network profiling system | |
| US20070258483A1 (en) | Network profiling system having nonphysical layer test system | |
| CN111585670B (en) | Detection method and detection system of wireless detection system | |
| CN108768456B (en) | Method, device and system for detecting transparent transmission port loss of multi-system access platform | |
| KR19990070545A (en) | Base station test equipment of wireless subscriber network system | |
| CN111130502A (en) | Attenuator control circuit | |
| KR100776170B1 (en) | System and method for diagnosis of optical repeater quality | |
| CN103684536A (en) | Wireless communication apparatus | |
| CN108768458B (en) | Method and device for detecting leaky cable of multi-system access platform and leaky cable detection system | |
| US20170294927A1 (en) | Interference state detection method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |