CN106921446B - System and apparatus for detecting multiple antenna feed networks - Google Patents
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- H04B17/17—Detection of non-compliance or faulty performance, e.g. response deviations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
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Abstract
The invention relates to the technical field of communication, and discloses a system and a device for detecting a multi-antenna feed network, wherein the system comprises: the system comprises a plurality of Radio Frequency Identification (RFID) tags, a first RFID reader-writer and a detection device, wherein the RFID tags are respectively positioned in coverage areas of all antennas of the multi-antenna feed network; the first RFID reader-writer is used for transmitting RFID inquiry signals to the plurality of RFID labels through the multi-antenna feed network to be detected; the RFID label is used for replying a label identification ID to the first RFID reader-writer after receiving the RFID inquiry signal of the first RFID reader-writer; the first RFID reader-writer is also used for receiving the label ID returned by the RFID label; and the detection device is used for determining the branch corresponding to the RFID label of which the corresponding label ID is not received by the first RFID reader-writer as the branch with the abnormality in the multi-antenna feed network. The method and the device can determine the abnormal branches in the multi-antenna feed network and provide convenience for subsequent maintenance.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a system and a device for detecting a multi-antenna feed network.
Background
In existing communication networks, one base station may have a plurality of antennas distributed at different locations, through which wireless signals are transmitted to a designated area. Namely, the transmission of wireless signals is realized through a multi-antenna feed network.
But branches in the multi-antenna feed network may be abnormal and malfunction due to component reasons. For example, the branches in the multi-antenna feed network may fail because the components such as the antenna, the feed line, the power divider, and the combiner are damaged by external force, water immersion, chemical corrosion, and aging. Therefore, there is a need to provide a method that is capable of detecting a failure of a multi-antenna feed network. And because the branches of the multi-antenna feed network may have the characteristics of overlapping or wide distribution, it is further more desirable to provide a detection scheme capable of determining the exact branch in which the abnormality occurs, so as to facilitate subsequent maintenance.
Disclosure of Invention
It is an object of the present invention to provide a system and a device for detecting a multi-antenna feeding network in order to solve or at least partly solve the above technical problems.
In order to achieve the above object, the present invention provides a system for detecting a multi-antenna feed network, comprising: the system comprises a plurality of Radio Frequency Identification (RFID) tags, a first RFID reader-writer and a detection device, wherein the RFID tags are respectively positioned in coverage areas of all antennas of the multi-antenna feed network; the first RFID reader-writer is used for transmitting RFID inquiry signals to the plurality of RFID labels through a multi-antenna feed network to be detected; the RFID tag is used for replying a tag identification ID to the first RFID reader-writer after receiving the RFID inquiry signal of the first RFID reader-writer; the first RFID reader-writer is also used for receiving the label ID returned by the RFID label; the detection device is used for determining the branch corresponding to the RFID label of which the corresponding label ID is not received by the first RFID reader-writer as the branch with the abnormality in the multi-antenna feed network.
Preferably, the output power of the first RFID reader-writer is a critical power for the plurality of RFID tags to receive the RFID query signal transmitted by the first RFID reader-writer.
Preferably, the system further comprises: a second RFID reader; the second RFID reader-writer is used for transmitting RFID inquiry signals to the plurality of RFID labels through a communication path outside the multi-antenna feed network to be detected; the RFID label is also used for replying a label ID to the second RFID reader-writer after receiving the RFID inquiry signal of the second RFID reader-writer; the second RFID reader-writer is also used for receiving the label ID returned by the RFID label; the detection device is used for determining the corresponding branch of the RFID label, the corresponding label ID of which is received by the second RFID reader-writer and is not received by the first RFID reader-writer, as the branch with the abnormality in the multi-antenna feed network.
Preferably, the system further comprises a combiner, a power divider, a power combiner or a coupler; the first RFID reader-writer is connected to the multi-antenna feed network through the combiner, the power divider, the power combiner or the coupler.
Preferably, the plurality of RFID tags are respectively located in preset adjacent areas of the antennas of the multi-antenna feeding network.
According to another aspect of the invention, an apparatus for detecting a multi-antenna feed network is disclosed, the apparatus comprising: the first radio frequency identification RFID reader-writer is used for transmitting RFID inquiry signals to a plurality of RFID labels through a multi-antenna feed network to be detected and receiving label identification IDs returned by the RFID labels, and the plurality of RFID labels are respectively positioned in coverage areas of all antennas of the multi-antenna feed network; and the detection device is used for determining the branch corresponding to the RFID label of which the corresponding label ID is not received by the first RFID reader-writer as the branch with the abnormality in the multi-antenna feed network.
Preferably, the output power of the first RFID reader-writer is a critical power for the plurality of RFID tags to receive the RFID query signal transmitted by the first RFID reader-writer.
Preferably, the device further comprises a second RFID reader for transmitting RFID query signals to the plurality of RFID tags through a communication path other than the multi-antenna feed network to be detected, and receiving tag IDs returned by the RFID tags; the detection device is used for determining the branch corresponding to the RFID label of which the corresponding label ID is received by the second RFID reader-writer and is not received by the first RFID reader-writer as the branch with the abnormality in the multi-antenna feed network.
Preferably, the first RFID reader is connected to the multi-antenna feed network through a combiner, a power divider, a power combiner, or a coupler.
Preferably, the output power of the second RFID reader is the maximum output power.
According to the technical scheme, the system comprises a plurality of Radio Frequency Identification (RFID) tags, a first RFID reader-writer and a detection device, wherein the RFID tags are respectively positioned in the coverage area of each antenna of the multi-antenna feed network; the first RFID reader-writer is used for transmitting RFID inquiry signals to the plurality of RFID labels through a multi-antenna feed network to be detected; the RFID tag is used for replying a tag identification ID to the first RFID reader-writer after receiving the RFID inquiry signal of the first RFID reader-writer; the first RFID reader-writer is also used for receiving the label ID returned by the RFID label; the detection device is used for determining the branch corresponding to the RFID label of which the corresponding label ID is not received by the first RFID reader-writer as the branch with the abnormality in the multi-antenna feed network. When the branch is abnormal and cannot transmit signals, the RFID label corresponding to the branch cannot receive the RFID inquiry signal transmitted by the first RFID reader-writer and cannot return the label ID, and then the first RFID reader-writer cannot receive the label ID returned by the RFID label, so that the detection device can determine the branch with the abnormality in the multi-antenna feed network and provide convenience for subsequent maintenance.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a block diagram of a system for detecting a multiple antenna feed network according to an embodiment of the present invention;
FIG. 2 is a block diagram of an RFID tag according to an embodiment of the present invention;
fig. 3 is a block diagram of a system for detecting a multiple antenna feed network according to an embodiment of the present invention;
fig. 4 is a block diagram of a system for detecting a multiple antenna feed network according to an embodiment of the present invention;
fig. 5 is a block diagram of an apparatus for detecting a multi-antenna feed network according to an embodiment of the present invention; and
fig. 6 is a block diagram of an apparatus for detecting a multi-antenna feed network according to an embodiment of the present invention; and
fig. 7 is a schematic view of an application scenario of the device for detecting a multi-antenna feeding network according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a block diagram of a system for detecting a multi-antenna feed network according to an embodiment of the present invention. As shown in fig. 1, the system may include a plurality of radio frequency identification RFID tags 300, a first RFID reader 100, and a detection device 200, each located in a coverage area of a respective antenna of the multi-antenna feed network.
The first RFID reader 100 is configured to transmit an RFID query signal to the plurality of RFID tags 300 through the multi-antenna feeding network to be detected. The RFID tag 300 is configured to reply a tag identification ID to the first RFID reader 100 after receiving the RFID query signal of the first RFID reader 100. The first RFID reader/writer 100 is also configured to receive the tag ID returned by the RFID tag 300. The detection device 200 is configured to determine a branch corresponding to the RFID tag 300 whose corresponding tag ID is not received by the first RFID reader/writer 100 as a branch having an abnormality in the multi-antenna feed network.
Wherein, a plurality of RFID tags 300 can be respectively located in the preset adjacent area of each antenna of the multi-antenna feeding network. For example, the RFID tag 300 may be located in an area centered on an antenna in a corresponding multi-antenna feed network with a preset length as a radius.
For example, as shown in FIG. 2, RFID tag 300 may be a passive narrowband RFID tag using 840MHz-845MHz, which may include RFID tag chip 310, matching network 320, filter 330, and tag antenna 340. The RFID tag chip 310 conforms to international or national standards. The RFID tag chip 310 is connected to the matching network 320, the matching network 320 is connected to the filter 330, and the filter 330 is connected to the tag antenna 340, so as to suppress the interference signals in each out-of-band frequency band.
The detection device 200 and the first RFID reader 100 may be in communication connection through a wired or wireless network, and the first RFID reader 100 sends the received tag ID to the detection device; or the detection device 200 and the first RFID reader 100 are integrated into the same device, the first RFID reader 100 stores data into a memory, and the detection device 200 reads the data in the memory; or the detection device 200 obtains the tag ID received by the first RFID reader 100 by other means known in the art, which is not particularly limited by the present invention.
The detection apparatus 200 reads the stored configuration mapping list, where the mapping list includes mapping relationships between the corresponding tag IDs of the RFID tags and the branches in the multi-antenna feeding network. The detection device 200 compares the tag ID received by the first RFID reader/writer 100 with the tag IDs in the mapping list, and determines a branch corresponding to the RFID tag 300 whose corresponding tag ID is not received by the first RFID reader/writer 100. When the branch is abnormal and cannot transmit signals or the signal attenuation is too large, the RFID tag 300 corresponding to the branch cannot receive the RFID query signal transmitted by the first RFID reader 100, so that the RFID tag 300 cannot reply to the corresponding tag ID. Therefore, the detection device 200 determines the identified branch as a branch having an abnormality in the multi-antenna feeding network.
In one embodiment, the output power of the first RFID reader 100 may be a critical power for the plurality of RFID tags 300 to receive the RFID query signal transmitted by the first RFID reader 100.
The critical power is a condition that when the output power of the first RFID reader 100 is reduced, one or some RFID tags 300 cannot receive the RFID query signal of the first RFID reader 100, that is, the critical power is a minimum power at which the plurality of RFID tags 300 can receive the RFID query signal of the first RFID reader 100 under the condition of the adjustment accuracy of the first RFID reader 100. For example, under the condition of the adjustment accuracy of the first RFID reader/writer 100, if the minimum powers of the plurality of RFID tags, that is, the minimum powers of the tag 1 and the tag 2 … …, which correspond to the tag n and can receive the RFID inquiry signal of the first RFID reader/writer 100, are P1 and P2 … … Pn, respectively, the maximum power of the tag 1 and the power of the tag 2 … … Pn is selected as the critical power.
By adopting the technical scheme in the embodiment, when the branch is abnormal so that the transmission signal is attenuated, the RFID label corresponding to the branch cannot receive the RFID inquiry signal transmitted by the first RFID reader-writer, and then the first RFID reader-writer cannot receive the label ID returned by the RFID label, so that the abnormal branch can be determined, and the detection accuracy can be improved.
In one embodiment, the system further comprises a combiner, a power divider, a power combiner, or a coupler; the first RFID reader-writer is connected to the multi-antenna feed network through the combiner, the power divider, the power combiner or the coupler.
The first RFID reader-writer can be connected to the multi-antenna feed network through a combiner, a power divider, a power combiner or a coupler. When the first RFID reader-writer is connected to the multi-antenna feed network, the signals sent by the first RFID reader-writer can be transmitted through the multi-antenna feed network. Other ways known in the art may also be adopted to enable the first RFID reader to transmit the RFID query signal to the plurality of RFID tags through the multi-antenna feeding network to be detected, and the present invention is not particularly limited thereto.
For example, as shown in fig. 3, a multi-antenna feed network is used to transmit signals of a signal source through a plurality of antennas. The first RFID reader 100 may access to the multi-antenna feeding network through the combiner 400, and the transmitted signal is transmitted to the RFID tag 300 through the multi-antenna feeding network. The detection device 200 is connected to the first RFID reader/writer 100, and may be connected to the first RFID reader/writer through a network, for example. The first RFID reader 100 performs signal transmission at a critical power. The first RFID reader 100 transmits an RFID query signal to the plurality of RFID tags 300 through the multi-antenna feed network to be detected, and the RFID tags 300 reply the tag IDs after receiving the RFID query signal transmitted by the first RFID reader 100. The first RFID reader/writer 100 receives the tag ID returned by the RFID tag 300. The detection device 200 determines the branch corresponding to the RFID tag 300 whose corresponding tag ID is not received by the first RFID reader/writer 100 as a branch having an abnormality in the multi-antenna feed network.
By adopting the technical scheme, the abnormal branch in the multi-antenna feed network can be determined, and convenience can be provided for subsequent maintenance.
In one embodiment, the system further includes a second RFID reader 500. The second RFID reader 500 is configured to transmit an RFID query signal to the plurality of RFID tags 300 through a communication path other than the multi-antenna feeding network to be detected. The RFID tag 300 is further configured to reply a tag ID to the second RFID reader 500 after receiving the RFID query signal of the second RFID reader 500. The second RFID reader 500 is also used to receive the tag ID returned by the RFID tag 300. The detection device 200 is configured to determine a branch corresponding to an RFID tag whose corresponding tag ID is received by the second RFID reader/writer 500 and is not received by the first RFID reader/writer 100 as a branch having an abnormality in the multi-antenna feed network.
The detection device 200 and the second RFID reader 500 are in communication connection through a wired or wireless network, and the second RFID reader 500 sends the received tag ID to the detection device 200; or the detection device 200 and the second RFID reader 500 are integrated into the same device, the second RFID reader 500 stores data into a memory, and the detection device 200 reads the data in the memory; or the detection device 200 obtains the tag ID received by the second RFID reader 500 by other means known in the art, which is not particularly limited by the present invention. The second RFID reader 500 may transmit the RFID query signal at the maximum power or at a power sufficient for all RFID tags to receive.
The second RFID reader 500 transmits an RFID query signal to the plurality of RFID tags 300 through a communication path other than the multi-antenna feeding network to be detected. When the second RFID reader 500 receives the tag ID returned by the RFID tag 300, it indicates that the RFID tag 300 is operating normally. Thus, it can be determined that the first RFID reader/writer 100 does not receive the tag ID of the RFID tag 300 because of the branch failure of the multi-antenna feeding network. Further, the detection device 200 identifies a branch corresponding to the RFID tag 300, which has been received by the second RFID reader/writer 500 and has not been received by the first RFID reader/writer 100, as a branch having an abnormality in the multi-antenna feed network.
For example, as shown in fig. 4, the first RFID reader 100 may access the multi-antenna feeding network through the combiner 400, and the transmitted signal is transmitted to the RFID tag 300 through the multi-antenna feeding network. The second RFID reader 500 transmits a signal to the RFID tag 300 through a communication path other than the multi-antenna feed network. The detection device 200 is connected to the first RFID reader/writer 100 and the second RFID reader/writer 500. The first RFID reader 100 performs signal transmission at critical power, and the second RFID reader 500 performs signal transmission at maximum power. The first RFID reader 100 transmits RFID query signals to the plurality of RFID tags 300 through the multi-antenna feed network to be detected, and the second RFID reader 500 transmits RFID query signals to the plurality of RFID tags 300 through a communication path other than the multi-antenna feed network to be detected. The first RFID reader/writer 100 receives the tag ID returned from the RFID tag 300, and the second RFID reader/writer 500 receives the tag ID returned from the RFID tag 300. The detection device 200 determines the branch corresponding to the RFID tag 300, which has the corresponding tag ID received by the second RFID reader/writer 500 and is not received by the first RFID reader/writer 100, as a branch having an abnormality in the multi-antenna feed network.
By adopting the technical scheme in the embodiment, the situation that the RFID label cannot reply the label ID due to the fault of the RFID label can be eliminated when the fault is judged, and the accuracy of fault detection on the multi-antenna feed network is further improved.
As shown in fig. 5, an apparatus 600 for detecting a multi-antenna feed network may include the following components.
The first radio frequency identification RFID reader 610 is configured to transmit an RFID query signal to a plurality of RFID tags through a multi-antenna feed network to be detected, and receive a tag identification ID returned by the RFID tag, where the plurality of RFID tags are located in coverage areas of antennas of the multi-antenna feed network, respectively;
and a detection device 620, configured to determine a branch corresponding to an RFID tag whose corresponding tag ID is not received by the first RFID reader 610 as a branch having an abnormality in the multi-antenna feed network.
In one embodiment, the output power of the first RFID reader 610 is a critical power for the plurality of RFID tags to receive the RFID query signal transmitted by the first RFID reader.
In one embodiment, as shown in fig. 6, the device 600 further includes a second RFID reader 630 for transmitting an RFID inquiry signal to the plurality of RFID tags through a communication path other than the multi-antenna feeding network to be detected, and receiving a tag ID returned by the RFID tag. The detection device 620 is configured to determine a branch corresponding to an RFID tag whose corresponding tag ID is received by the second RFID reader/writer 630 and is not received by the first RFID reader/writer 610 as a branch having an abnormality in the multi-antenna feeding network.
In an embodiment, as shown in fig. 7, the first RFID reader 610 may access the multi-antenna feeding network through a combiner, a power divider, a power combiner, or a coupler. The second RFID reader 630 transmits an RFID query signal (not shown in fig. 7) to a plurality of RFID tags through a communication path other than the multi-antenna feeding network to be detected.
In one embodiment, the output power of the second RFID reader 630 is the maximum output power.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (6)
1. A system for detecting a multi-antenna feed network, the system comprising: the system comprises a plurality of Radio Frequency Identification (RFID) tags, a first RFID reader-writer and a detection device, wherein the RFID tags are respectively positioned in coverage areas of all antennas of the multi-antenna feed network;
the first RFID reader-writer is used for transmitting RFID inquiry signals to the plurality of RFID labels through a multi-antenna feed network to be detected;
the RFID tag is used for replying a tag identification ID to the first RFID reader-writer after receiving the RFID inquiry signal of the first RFID reader-writer;
the first RFID reader-writer is also used for receiving the label ID returned by the RFID label;
the output power of the first RFID reader-writer is critical power for enabling the plurality of RFID labels to receive the RFID inquiry signals transmitted by the first RFID reader-writer;
the system further comprises: a second RFID reader;
the second RFID reader-writer is used for transmitting RFID inquiry signals to the plurality of RFID labels through a communication path outside the multi-antenna feed network to be detected;
the RFID label is also used for replying a label ID to the second RFID reader-writer after receiving the RFID inquiry signal of the second RFID reader-writer;
the second RFID reader-writer is also used for receiving the label ID returned by the RFID label;
the detection device is used for determining the corresponding branch of the RFID label, the corresponding label ID of which is received by the second RFID reader-writer and is not received by the first RFID reader-writer, as the branch with the abnormality in the multi-antenna feed network.
2. The system of claim 1, further comprising a combiner, power divider, power combiner, or coupler;
the first RFID reader-writer is connected to the multi-antenna feed network through the combiner, the power divider, the power combiner or the coupler.
3. The system of claim 1, wherein the plurality of RFID tags are respectively located at predetermined adjacent areas of the respective antennas of the multi-antenna feed network.
4. An apparatus for detecting a multi-antenna feed network, the apparatus comprising:
the first RFID reader-writer is used for transmitting RFID inquiry signals to a plurality of RFID labels through a multi-antenna feed network to be detected and receiving label identification IDs returned by the RFID labels, and the plurality of RFID labels are respectively positioned in coverage areas of all antennas of the multi-antenna feed network;
the output power of the first RFID reader-writer is critical power for enabling the plurality of RFID labels to receive the RFID inquiry signals transmitted by the first RFID reader-writer;
the device also comprises a second RFID reader-writer which is used for transmitting RFID inquiry signals to the plurality of RFID labels through a communication path outside the multi-antenna feed network to be detected and receiving label IDs returned by the RFID labels;
and the detection device is used for determining the branch corresponding to the RFID label of which the corresponding label ID is received by the second RFID reader-writer and is not received by the first RFID reader-writer as the branch with the abnormality in the multi-antenna feed network.
5. The device of claim 4, wherein the first RFID reader accesses the multi-antenna feed network through a combiner, power divider, power combiner, or coupler.
6. The device of claim 4, wherein the output power of the second RFID reader is a maximum output power.
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| CN103384385A (en) * | 2013-07-17 | 2013-11-06 | 三维通信股份有限公司 | Automatic antenna feed fault detection system for distributed antenna system |
| CN105160369A (en) * | 2015-08-31 | 2015-12-16 | 湖南省普安建设工程有限公司 | Fire-fighting equipment monitoring tags, fire-fighting equipment management system and fire-fighting equipment management method |
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| US20080079575A1 (en) * | 2006-09-29 | 2008-04-03 | Sensormatic Electronics Corporation | Distributed radio frequency identification reader and method therefore |
| KR101305860B1 (en) * | 2009-03-10 | 2013-09-06 | 엘에스산전 주식회사 | Rfid antenna system and control method of the same |
| CN102158889A (en) * | 2011-01-12 | 2011-08-17 | 珠海银邮光电技术发展股份有限公司 | RFID (radio frequency identification)-based monitoring system of mobile signal coverage effect |
| CN104655947B (en) * | 2013-11-18 | 2017-09-01 | 广州汽车集团股份有限公司 | A kind of car antenna method for diagnosing faults, apparatus and system |
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| CN103384385A (en) * | 2013-07-17 | 2013-11-06 | 三维通信股份有限公司 | Automatic antenna feed fault detection system for distributed antenna system |
| CN105160369A (en) * | 2015-08-31 | 2015-12-16 | 湖南省普安建设工程有限公司 | Fire-fighting equipment monitoring tags, fire-fighting equipment management system and fire-fighting equipment management method |
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