CN106921447B - Method for detecting multi-antenna feed network - Google Patents
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Abstract
The invention relates to the technical field of communication, and discloses a method for detecting a multi-antenna feed network, which comprises the following steps: a first radio frequency identification RFID reader transmits RFID inquiry signals to a plurality of RFID labels through a multi-antenna feed network to be detected, wherein the plurality of RFID labels are respectively positioned in the coverage area of each antenna of the multi-antenna feed network; the first RFID reader-writer receives a tag identification ID returned by the RFID tag; the detection device determines 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 invention relates to the technical field of communication, in particular to a method 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 method 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 method of detecting a multi-antenna feeding network such that the above mentioned technical problems can be solved or at least partially solved.
In order to achieve the above object, the present invention provides a method for detecting a multi-antenna feed network, which is characterized in that the method comprises: a first radio frequency identification RFID reader transmits RFID inquiry signals to a plurality of RFID labels through a multi-antenna feed network to be detected, wherein the plurality of RFID labels are respectively positioned in the coverage area of each antenna of the multi-antenna feed network; the first RFID reader-writer receives a tag identification ID returned by the RFID tag; the detection device determines 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 method further comprises: the second RFID reader-writer transmits RFID inquiry signals to the plurality of RFID labels through a communication path outside the multi-antenna feed network to be detected; the second RFID reader-writer receives the label ID returned by the RFID label; the step of determining the branch corresponding to the RFID tag of which the corresponding tag ID is not received by the first RFID reader-writer as the branch with the abnormality in the multi-antenna feed network by the detection device comprises the following steps: and the detection device determines 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 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 present invention, there is also provided a method of detecting a multi-antenna feed network, the method comprising: the method comprises the steps that a detection device receives a first message sent by a first Radio Frequency Identification (RFID) reader-writer, wherein the first message comprises a label Identification (ID) received after the first RFID reader-writer transmits an RFID inquiry signal to a plurality of RFID labels through a multi-antenna feed network to be detected, and the RFID labels are respectively positioned in coverage areas of antennas of the multi-antenna feed network; the detection device determines the corresponding RFID label ID which is not received by the first RFID reader-writer according to the received first message, and determines the branch corresponding to the RFID label as the branch with 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 method further comprises: the detection device receives a second message sent by a second RFID reader-writer, wherein the second message comprises a tag ID received after the second RFID reader-writer transmits RFID inquiry signals to the RFID tags through a communication path outside the multi-antenna feed network to be detected; the detection device determines that the corresponding tag ID is not received by the first RFID reader-writer according to the received first message, and the step of determining the branch corresponding to the RFID tag as the branch with the abnormality in the multi-antenna feed network comprises the following steps: and the detection device determines the corresponding RFID label ID which is received by the second RFID reader-writer and not received by the first RFID reader-writer according to the received first message and the second message, and determines the branch corresponding to the RFID label as the branch with 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 plurality of RFID tags are respectively located in preset adjacent areas of the antennas of the multi-antenna feeding network.
Through the technical scheme, the first radio frequency identification RFID reader-writer transmits RFID inquiry signals to a plurality of RFID labels through a multi-antenna feed network to be detected, and the plurality of RFID labels are respectively positioned in the coverage area of each antenna of the multi-antenna feed network; the first RFID reader-writer receives a tag identification ID returned by the RFID tag; the detection device determines 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 abnormal branch in the multi-antenna feed network can be determined, and convenience can be provided 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 flow diagram of a method of detecting a multi-antenna feed network according to an embodiment of the invention;
FIG. 2 is a schematic diagram of an application scenario according to an embodiment of the present invention;
fig. 3 is a flow diagram of a method of detecting a multi-antenna feed network according to an embodiment of the invention; and
fig. 4 is a flow diagram of a method of detecting a multi-antenna feed network according to an embodiment of the 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 flow diagram of a method of detecting a multi-antenna feed network according to an embodiment of the invention. The method may be used in a detection apparatus or system comprising a first RFID reader and a detection device. As shown in fig. 1, the method includes the following steps.
In step S110, the first RFID reader transmits an RFID query signal to the plurality of RFID tags through the multi-antenna feeding network to be detected.
The plurality of RFID tags are respectively located in the coverage area of each antenna of the multi-antenna feed network.
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.
The plurality of RFID tags can be respectively positioned in preset adjacent areas of the antennas of the multi-antenna feed network. For example, the RFID tag is located in an area having a radius of a preset length centered on the corresponding antenna.
In one embodiment, the output power of the first RFID reader is a critical power for the plurality of RFID tags to receive the RFID query signal transmitted by the first RFID reader.
The critical power is a condition that when the output power of the first RFID reader-writer is reduced, one or more RFID tags cannot receive the RFID query signal of the first RFID reader-writer, that is, the critical power is a minimum power at which the plurality of RFID tags can receive the RFID query signal of the first RFID reader-writer under the condition of the adjustment accuracy of the first RFID reader-writer. For example, under the condition of the adjustment accuracy of the first RFID reader, if the minimum powers of the plurality of RFID tags, tag 1 and tag 2 … …, tag n, which can receive the RFID query signal of the first RFID reader are P1 and P2 … … Pn, respectively, the maximum power of P1 and P2 … … 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 step S120, the first RFID reader/writer receives the tag identification ID returned by the RFID tag.
For example, after receiving an RFID query signal transmitted by the first RFID reader, the RFID tag replies its corresponding tag ID to the first RFID reader. The first RFID reader receives the tag ID.
In step S130, the detection device determines the branch corresponding to the RFID tag whose corresponding tag ID is not received by the first RFID reader/writer as the branch having the abnormality in the multi-antenna feed network.
The detection device is in communication connection with the first RFID reader-writer through a wired or wireless network, and the first RFID reader-writer sends the received tag ID to the detection device; or the detection device and the first RFID reader-writer are integrated into the same equipment, the first RFID reader-writer stores data into the memory, and the detection device reads the data in the memory; or the detection device obtains the tag ID received by the first RFID reader in other manners known in the art, which is not particularly limited by the present invention.
For example, the detection device reads a stored configuration mapping list, where the mapping list includes mapping relationships between corresponding tag IDs of the RFID tags and branches in the multi-antenna feed network. The detection device compares the tag ID received by the first RFID reader-writer with the tag IDs in the mapping list, and determines the corresponding branch of the corresponding RFID tag ID which is not received by the first RFID reader-writer. When the branch is abnormal and cannot transmit signals or the signal attenuation is too large, the RFID label corresponding to the branch cannot receive the RFID inquiry signal transmitted by the first RFID reader-writer, and therefore the RFID label cannot reply the corresponding label ID. Therefore, the detection means determines the identified branch as a branch having an abnormality in the multi-antenna feeding network.
In an embodiment, the method further comprises: the second RFID reader-writer transmits RFID inquiry signals to the plurality of RFID labels through a communication path outside the multi-antenna feed network to be detected; and the second RFID reader-writer receives the label ID returned by the RFID label. The determining, by the detection device, the branch corresponding to the RFID tag whose corresponding tag ID is not received by the first RFID reader/writer as the branch having the abnormality in the multi-antenna feed network may include: and the detection device determines 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.
The detection device is in communication connection with a second RFID reader-writer through a wired or wireless network, and the second RFID reader-writer sends the received tag ID to the detection device; or the detection device and a second RFID reader-writer are integrated into the same equipment, the second RFID reader-writer stores data into the memory, and the detection device reads the data in the memory; or the detection device obtains the tag ID received by the second RFID reader in other manners known in the art, which is not particularly limited by the present invention. The second RFID reader may transmit signals at maximum power or power sufficient for all RFID tags to receive.
And the second RFID reader-writer transmits RFID inquiry signals to the plurality of RFID labels through a communication path outside the multi-antenna feed network to be detected. And when the second RFID reader-writer receives the label ID returned by the RFID label, the RFID label works normally. Thus, it can be determined that the tag ID of the RFID tag is not received by the first RFID reader/writer due to a branch failure of the multi-antenna feeding network. And 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.
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.
Fig. 2 is a schematic diagram of an application scenario according to an embodiment of the present invention. As shown in fig. 2, the multi-antenna feed network is used to transmit signals of a signal source through a plurality of antennas. The first RFID reader-writer can be connected to the multi-antenna feed network through the combiner, and the sent signals are transmitted to the RFID tags 1-n through the multi-antenna feed network. The second RFID reader/writer transmits signals to the RFID tags 1 to n through a communication path other than the multi-antenna feed network. The detection device is connected with the first RFID reader-writer and the second RFID reader-writer through a network. The first RFID reader-writer performs signal transmission at critical power, and the second RFID reader-writer performs signal transmission at maximum power. As shown in fig. 3, the flow of the method for detecting the multi-antenna feeding network in the present embodiment includes the following steps.
In step S304, the first RFID reader transmits an RFID query signal to the plurality of RFID tags through the multi-antenna feed network to be detected, and the second RFID reader transmits an RFID query signal to the plurality of RFID tags through a communication path other than the multi-antenna feed network to be detected. In step S306, the first RFID reader receives the tag identification ID returned by the RFID tag, and the second RFID reader receives the tag ID returned by the RFID tag. In step S308, the detection device determines the branch corresponding to the RFID tag whose corresponding tag ID is received by the second RFID reader/writer and is not received by the first RFID reader/writer as a branch having an abnormality in the multi-antenna feeding network.
By adopting the technical scheme in the embodiment, the condition 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, the accuracy of fault detection of the multi-antenna feed network is further improved, and convenience can be provided for follow-up maintenance.
Fig. 4 is a flow diagram of a method of detecting a multi-antenna feed network according to an embodiment of the invention. The method can be used in a detection device, which can be a software system or a hardware device, or a combination of both. The detection device is in communication connection with a first RFID reader-writer through a wired or wireless network, or the detection device and the first RFID reader-writer are integrated into the same equipment, the first RFID reader-writer stores data into a memory, and the detection device reads the data in the memory; or the detecting device obtains the RFID tag received by the first RFID reader in other manners known in the art, which is not particularly limited by the invention. As shown in fig. 4, the method includes the following steps.
In step S410, the detection device receives a first message sent by a first RFID reader.
The first message may include tag identification IDs received after the first RFID reader transmits the RFID query signal to the plurality of RFID tags through the multi-antenna feed network to be detected, where the plurality of RFID tags are located in coverage areas of the antennas of the multi-antenna feed network, respectively.
In step S420, the detection device determines, according to the received first message, an RFID tag whose corresponding tag ID is not received by the first RFID reader/writer, and determines a branch corresponding to the determined RFID tag as a branch in which an abnormality exists in the multi-antenna feed network.
In one embodiment, the output power of the first RFID reader is a critical power for the plurality of RFID tags to receive the RFID query signal transmitted by the first RFID reader.
The critical power is a condition that when the output power of the first RFID reader-writer is reduced, one or more RFID tags cannot receive the RFID query signal of the first RFID reader-writer, that is, the critical power is a minimum power at which the plurality of RFID tags can receive the RFID query signal of the first RFID reader-writer under the condition of the adjustment accuracy of the first RFID reader-writer. For example, under the condition of the adjustment accuracy of the first RFID reader, if the minimum powers of the plurality of RFID tags, tag 1 and tag 2 … …, tag n, which can receive the RFID query signal of the first RFID reader are P1 and P2 … … Pn, respectively, the maximum power of P1 and P2 … … Pn is selected as the critical power.
In an embodiment, the method may further comprise: and the detection device receives a second message sent by the second RFID reader-writer. The second message comprises the label ID received after the second RFID reader-writer transmits the RFID inquiry signal to the plurality of RFID labels through a communication path outside the multi-antenna feed network to be detected. The determining, by the detection device, the RFID tag whose corresponding tag ID is not received by the first RFID reader according to the received first message, and determining the branch corresponding to the RFID tag as the branch having the abnormality in the multi-antenna feed network may include: and the detection device determines the corresponding tag ID according to the received first message and the second message, determines the RFID tag which is received by the second RFID reader-writer and not received by the first RFID reader-writer, and determines the branch corresponding to the determined RFID tag as the branch with the abnormality in the multi-antenna feed network.
In an embodiment, the first RFID reader is connected to the multi-antenna feeding network through a combiner, a power divider, a power combiner, or a coupler.
In one embodiment, a plurality of RFID tags are respectively located in a preset adjacent area of each antenna of 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 then the first RFID reader-writer cannot receive the label ID returned by the RFID label, so the technical scheme of the invention can determine the abnormal branch and provide convenience for subsequent maintenance.
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 method of detecting a multi-antenna feed network, the method comprising:
a first radio frequency identification RFID reader transmits RFID inquiry signals to a plurality of RFID labels through a multi-antenna feed network to be detected, wherein the plurality of RFID labels are respectively positioned in the coverage area of each antenna of the multi-antenna feed network;
the first RFID reader-writer receives a tag identification ID returned by the RFID tag;
the second RFID reader-writer transmits RFID inquiry signals to the plurality of RFID labels through a communication path outside the multi-antenna feed network to be detected;
the second RFID reader-writer receives the label ID returned by the RFID label;
the detection device determines the corresponding 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 abnormality in 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 signal transmitted by the first RFID reader-writer.
2. The method of claim 1,
and the first RFID reader-writer is accessed to the multi-antenna feed network through a combiner, a power divider, a power combiner or a coupler.
3. The method of claim 1,
the plurality of RFID tags are respectively located in preset adjacent areas of the antennas of the multi-antenna feed network.
4. A method of detecting a multi-antenna feed network, the method comprising:
the method comprises the steps that a detection device receives a first message sent by a first Radio Frequency Identification (RFID) reader-writer, wherein the first message comprises a label Identification (ID) received after the first RFID reader-writer transmits an RFID inquiry signal to a plurality of RFID labels through a multi-antenna feed network to be detected, and the RFID labels are respectively positioned in coverage areas of antennas of the multi-antenna feed network;
the detection device receives a second message sent by a second RFID reader-writer, wherein the second message comprises a tag ID received after the second RFID reader-writer transmits RFID inquiry signals to the RFID tags through a communication path outside the multi-antenna feed network to be detected;
the detection device determines the corresponding RFID label ID which is received by the second RFID reader-writer and is not received by the first RFID reader-writer according to the received first message and the second message, and determines the branch corresponding to the RFID label as the branch with abnormality in 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 signal transmitted by the first RFID reader-writer.
5. The method of claim 4,
and the first RFID reader-writer is accessed to the multi-antenna feed network through a combiner, a power divider, a power combiner or a coupler.
6. The method of claim 4,
the plurality of RFID tags are respectively located in preset adjacent areas of the antennas of the multi-antenna feed network.
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| CN110267298B (en) * | 2019-06-14 | 2020-04-24 | 深圳市觅拓物联信息技术有限公司 | Link loss monitoring method and device and gateway equipment |
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