CN109150324B - Antenna correction method and device, base station and computer readable storage medium - Google Patents
Antenna correction method and device, base station and computer readable storage medium Download PDFInfo
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- CN109150324B CN109150324B CN201710512393.8A CN201710512393A CN109150324B CN 109150324 B CN109150324 B CN 109150324B CN 201710512393 A CN201710512393 A CN 201710512393A CN 109150324 B CN109150324 B CN 109150324B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
- H04B17/12—Monitoring; Testing of transmitters for calibration of transmit antennas, e.g. of the amplitude or phase
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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- 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
Abstract
The invention relates to an antenna correction method and device, a base station and a computer readable storage medium. According to the scheme of the invention, when the base station triggers the antenna correction in one direction, if the fault channel exists in the direction, the fault channels are rejected in a marking mode, the fault channel and the channel in the other direction corresponding to the fault channel are specifically marked, and the antenna correction in the direction is carried out on the normal channel except the fault channel, so that when the antenna correction in the other direction is triggered, the antenna correction is carried out only on the channel which is not marked in the direction, the problem that the antenna correction fails due to the faults of a small number of antenna channels in the antenna system is avoided, and the performance stability of the antenna system is improved.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to an antenna calibration method and apparatus, a base station, and a computer-readable storage medium.
Background
In a smart antenna system, many uncertainties cause array errors in the true antenna array manifold, thereby severely affecting the performance of the baseband algorithm. The multi-antenna calibration based on the large-scale MIMO system is an important means for ensuring the excellent performance of the antenna system. In commercial use, due to the complexity of the environment, the base station is interfered by various external factors in the communication process, and sometimes some antenna channels are abnormal, if one channel is abnormal, the antenna correction cannot pass, and the correction weight cannot be compensated to the channel, so that the service shaping effect is influenced, and finally the signal quality of the user terminal is greatly reduced.
Disclosure of Invention
The present invention mainly aims to provide an antenna calibration method and apparatus, a base station, and a computer readable storage medium, which aim to improve the performance stability of an antenna system.
In order to achieve the above object, the present invention provides an antenna calibration method, including:
when triggering antenna correction in a first direction, if a fault channel in the first direction is detected, marking the fault channel in the first direction and marking a second direction channel corresponding to the fault channel in the first direction, wherein when the first direction is an uplink direction, the second direction is a downlink direction or when the first direction is a downlink direction, the second direction is an uplink direction;
closing the marked channel and performing antenna correction in the first direction on the unmarked other channels in the first direction;
and when triggering the antenna correction in the second direction, performing the antenna correction in the second direction on the unmarked second direction channel.
Further, the present invention also provides an antenna calibration apparatus, comprising:
the system comprises a marking module, a judging module and a control module, wherein the marking module is used for marking a fault channel in a first direction and marking a second direction channel corresponding to the fault channel in the first direction if the fault channel in the first direction is detected when triggering antenna correction in the first direction, and the second direction is an uplink direction when the first direction is an uplink direction and is a downlink direction or is a downlink direction when the first direction is a downlink direction;
the correction module is used for closing the marked channel and performing antenna correction in the first direction on the unmarked other channels in the first direction;
the correction module is further configured to perform antenna correction in the second direction on the unmarked second direction channel when triggering antenna correction in the second direction.
Further, the present invention also provides a base station, including:
a memory storing an antenna calibration program;
a processor in communication with the memory and configured to execute the antenna calibration procedure to implement the steps of:
when triggering antenna correction in a first direction, if a fault channel in the first direction is detected, marking the fault channel in the first direction and marking a second direction channel corresponding to the fault channel in the first direction, wherein when the first direction is an uplink direction, the second direction is a downlink direction or when the first direction is a downlink direction, the second direction is an uplink direction;
closing the marked channel and performing antenna correction in the first direction on the unmarked other channels in the first direction;
and when triggering the antenna correction in the second direction, performing the antenna correction in the second direction on the unmarked second direction channel.
Further, the present invention also provides a computer-readable storage medium having stored thereon an antenna calibration program, which when executed by a processor, implements the steps of:
when triggering antenna correction in a first direction, if a fault channel in the first direction is detected, marking the fault channel in the first direction and marking a second direction channel corresponding to the fault channel in the first direction, wherein when the first direction is an uplink direction, the second direction is a downlink direction or when the first direction is a downlink direction, the second direction is an uplink direction;
closing the marked channel and performing antenna correction in the first direction on the unmarked other channels in the first direction;
and when triggering the antenna correction in the second direction, performing the antenna correction in the second direction on the unmarked second direction channel.
According to the scheme of the invention, when the base station triggers the antenna correction in one direction, if the fault channel exists in the direction, the fault channels are rejected in a marking mode, the fault channel and the channel in the other direction corresponding to the fault channel are specifically marked, and the antenna correction in the direction is carried out on the normal channel except the fault channel, so that when the antenna correction in the other direction is triggered, the antenna correction is carried out only on the channel which is not marked in the direction, the problem that the antenna correction fails due to the faults of a small number of antenna channels in the antenna system is avoided, and the performance stability of the antenna system is improved.
Drawings
Fig. 1 is a schematic diagram of an alternative hardware configuration of a base station according to the present invention;
fig. 2 is a schematic flowchart of a first embodiment of an antenna calibration method according to the present invention;
fig. 3 is a block diagram of an antenna calibration device according to a first embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: when the base station triggers the antenna correction in one direction, if a fault channel exists in the direction, the fault channels are rejected in a marking mode, the fault channel and the channel in the other direction corresponding to the fault channel are specifically marked, and the antenna correction in the direction is performed on the normal channel except the fault channel, so that when the antenna correction in the other direction is triggered, the antenna correction is performed only on the channel which is not marked in the direction, the problem that the antenna correction fails due to the faults of a small number of antenna channels in the antenna system is solved, and the performance stability of the antenna system is improved.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a base station in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the base station may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface, and the like. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., a Wi-Fi interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration of the base station shown in fig. 1 is not limiting of the base station and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, in an embodiment of the base station of the present invention, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and an antenna correction program.
In the base station shown in fig. 1, the network interface 1004 is mainly used for connecting to a background server and performing data communication with the background server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call the antenna calibration program stored in the memory 1005 and perform the following operations:
when triggering antenna correction in a first direction, if a fault channel in the first direction is detected, marking the fault channel in the first direction and marking a second direction channel corresponding to the fault channel in the first direction, wherein when the first direction is an uplink direction, the second direction is a downlink direction or when the first direction is a downlink direction, the second direction is an uplink direction;
closing the marked channel, and performing antenna correction in a first direction on other first direction channels which are not marked;
and when triggering the antenna correction in the second direction, performing the antenna correction in the second direction on the unmarked second direction channel.
Further, the processor 1001 may be configured to invoke an antenna calibration program stored in the memory 1005, and further perform the following operations:
when triggering the antenna correction in the second direction, if a fault channel in the second direction is detected, marking the fault channel in the second direction and marking a first direction channel corresponding to the fault channel in the second direction;
the marked channel is closed and antenna corrections in the second direction are made to the other second direction channels that are not marked.
Further, the processor 1001 may be configured to invoke an antenna calibration program stored in the memory 1005, and further perform the following operations:
when the antenna correction in the first direction is triggered again, removing the mark of the fault channel in the first direction at the last time;
and performing antenna correction of the first direction on the first direction channel which is not marked currently.
Further, the processor 1001 may be configured to invoke an antenna calibration program stored in the memory 1005, and further perform the following operations:
and counting the times of antenna correction, and outputting first preset alarm information when the counted times of antenna correction is greater than or equal to the preset times.
Further, the processor 1001 may be configured to invoke an antenna calibration program stored in the memory 1005, and further perform the following operations:
and counting the number of the dyed channels in the first direction or the second direction, and outputting second preset alarm information when the number of the dyed channels in any direction is greater than or equal to a preset number.
Further, the processor 1001 may be configured to invoke an antenna calibration program stored in the memory 1005, and further perform the following operations:
and respectively recording the correction weights of the first direction and the second direction for compensating the radio frequency signals of the first direction and the second direction.
Further, the present invention also provides an antenna calibration method applied to the base station shown in fig. 1, and referring to fig. 2, in a first embodiment of the antenna calibration method of the present invention, the antenna calibration method includes:
step S10, when triggering antenna calibration in a first direction, if a faulty channel in the first direction is detected, marking the faulty channel in the first direction, and marking a second-direction channel corresponding to the faulty channel in the first direction, where when the first direction is an uplink direction, the second direction is a downlink direction, or when the first direction is a downlink direction, the second direction is an uplink direction;
step S20, closing the marked channel and making antenna correction of the first direction for the unmarked other channels of the first direction;
step S30, when triggering the antenna calibration in the second direction, performing the antenna calibration in the second direction on the unmarked second direction channel.
In a large-scale mimo antenna system, due to the large number of antennas, the number of antennas in a conventional antenna system is at least 64, and even the number of antennas is multiplied. In the face of such a large number of antennas, it is particularly important to avoid the traffic being affected by factors that make corrections impossible due to the damage of a small number of antenna channels. The inventor considers through the algorithm research that: because the antenna system comprises a plurality of antennas, for a small number of channel faults, the service can also operate normally after the small number of fault channels are eliminated. Based on this, the present invention is proposed and will be described in detail below.
The inventor believes through research that: although the antenna corrections in the uplink direction and the downlink direction are performed independently, when the uplink channel is damaged, the SRS (Sounding Reference Signal, which is used for estimating the uplink channel and performing downlink beamforming) cannot be obtained, and the downlink channel cannot be used; when the downlink channel is damaged, the correction weight calculated according to the SRS is wasted, namely no channel is issued. Therefore, in the embodiment of the present invention, when one of a group of parallel uplink channels and downlink channels has a fault, the group of parallel uplink channels and downlink channels are simultaneously determined as a fault, and cannot be used for antenna correction; only when the states of the group of parallel uplink channels and the group of parallel downlink channels are good (namely, a plurality of indexes such as signal-to-noise ratio and the like are within a preset threshold, the channel states are considered to be good), the group of parallel uplink channels and the group of parallel downlink channels can be used in antenna correction.
It should be noted that the antenna calibration initiated by the base station is uplink first and downlink second, and the manually initiated calibration may also be performed separately for uplink antenna calibration or for downlink antenna calibration. In this embodiment, the first 8 antennas of the antenna system are taken as a representative, the first direction is an uplink direction, the second direction is a downlink direction, and the base station actively triggers to perform antenna calibration. Furthermore, for the case where the first direction is a downlink direction and the second direction is an uplink direction, those skilled in the art may refer to the implementation according to the following description of the embodiments of the present invention.
In this embodiment, after the base station is started, the base station monitors indexes such as service traffic in real time, and determines whether the indexes are lower than corresponding preset thresholds (for example, determines whether the real-time service traffic is smaller than the preset service traffic), and if so, triggers the antenna correction to achieve the target of real-time automatic adjustment, and meets the characteristics of rapid change and timely shaping of multiple channels.
In the following description, an "antenna bitmap" is used to indicate a failure state of uplink/downlink antenna channels in an antenna system, where a bit is used to indicate an antenna channel state, a bit of "0" indicates that the channel state is a failure, and a bit of "1" indicates that the channel state is good, for example, the first 8 antennas in the antenna system are taken as an example (the same applies to other antennas), if uplink channel states of 8 antennas are all good, the uplink antenna bitmap is "11111111", and if uplink channel states of two antennas, i.e., antenna No. 1 and antenna No. 2, in the 8 antennas are a failure, the uplink antenna bitmap is "11111001".
When uplink correction is just started, because downlink correction does not occur yet, the uplink antenna bitmap defaults to be '11111111' (indicating that the uplink channel states of 8 antennas are all good), firstly, whether a fault channel in the uplink direction exists is detected, namely whether a plurality of indexes such as the signal-to-noise ratio of the uplink channel exceed a preset threshold value is judged, and if yes, the corresponding uplink channel is judged to be the fault channel.
At this time, assuming that the uplink channels of the two antennas 1 and 2 are faulty, the uplink channels of the two antennas 1 and 2 and the corresponding downlink channels thereof need to be marked, in particular implementation, based on the previous description of the failed channel, it can be understood by those skilled in the art that, in the embodiment of the present invention, a bit is used to indicate whether the channel fails, therefore, marking of the channel is realized by "dyeing" (in the following description, dyeing is equivalent to marking), specifically, changing "1" representing a good state to "0" representing a failure state, because the uplink channels of the No. 1 antenna and the No. 2 antenna have faults, the dyed uplink antenna bitmap is changed from '11111111' to '11111001', and similarly, the dyed downlink antenna bitmap is changed from '11111111111' to '11111001', and the uplink correction result of the time is to reduce the rank of the two faulty antennas.
After the channel dyeing is completed, the antennas corresponding to the dyed channels are turned off (i.e., the faulty uplink channel and its corresponding downlink channel are turned off), and the other uplink channels except the faulty channel are subjected to the uplink antenna correction, that is, the uncolored uplink channels are subjected to the uplink antenna correction (here, the uplink channels of antennas 0, 3, 4, 5, 6, and 7). In addition, it should be noted that the implementation of the present invention does not require the execution timing of step S10 and step S20, that is, when a faulty channel is detected, antenna calibration may be performed on other channels except the faulty channel, and then dyeing is performed according to the faulty channel; or dyeing according to the fault channel and then performing antenna correction on other channels outside the fault channel.
After finishing the antenna correction in the uplink direction, then performing downlink correction, because two channels are dyed after the uplink correction, the two dyeing channels in the uplink direction are inherited before the downlink correction, the bitmap of the downlink antenna at this time is 11111001, if the correction is successful at this time, namely, a fault channel in the downlink direction does not exist, the bitmap is maintained to be 11111001, it can be seen that after the uplink and downlink correction is successful, the bitmaps of the effective antenna channels in the uplink and downlink should be consistent, so that the consistency of the amplitude and the phase of each channel after the antenna correction can be ensured, and the purpose of reducing the rank by closing the corresponding fault channel is also ensured, so that the service shaping effect is not influenced, and the performance stability of the antenna system is improved.
Further, in this embodiment, the antenna calibration method further includes:
and respectively recording the first direction and the second correction weight for compensating the radio frequency signals in the first direction and the second direction.
In this embodiment, after the antenna calibration in the uplink/downlink direction is completed, the calibration weights in the two directions are recorded, so that when the uplink/downlink radio frequency signals are transmitted later, the calibration weights in the corresponding directions can be used to compensate the radio frequency signals, and the service shaping effect is ensured.
According to the antenna correction method provided by the invention, when the base station triggers the antenna correction in one direction, if the fault channel exists in the direction, the fault channels are eliminated in a marking mode, the fault channel and the channel in the other direction corresponding to the fault channel are specifically marked, and the antenna correction in the direction is carried out on the normal channel except the fault channel, so that when the antenna correction in the other direction is triggered, the antenna correction is carried out only on the channel which is not marked in the direction, the problem that the antenna correction fails due to the fault of a small number of antenna channels in the antenna system is avoided, and the performance stability of the antenna system is improved.
Further, based on the first embodiment, a second embodiment of the antenna calibration method of the present invention is proposed, in which step S30 includes:
when the antenna correction in the second direction is triggered, if a fault channel in the second direction is detected, marking the fault channel in the second direction and marking a first direction channel corresponding to the fault channel in the second direction;
the marked channel is closed and antenna corrections in the second direction are made to the other second direction channels that are not marked.
In this embodiment, the base station actively triggers antenna calibration, and after completing the antenna calibration in the uplink direction, the base station initiates downlink calibration in response to user operation.
The downlink correction of this time still combines the channels 1 and 2 dyed in the previous uplink correction, that is, the downlink antenna bitmap at this time is "11111001", if it is detected that the downlink channel of the antenna 7 is a failed channel, the channel 7 is dyed and marked, the downlink antenna bitmap is changed from "11111001" to "01111001", then the currently dyed channel is closed, and the downlink correction is performed on the downlink channel which is not dyed, that is, the downlink correction is performed on the downlink channels of the antennas 0, 3, 4, 5 and 6, the correction is successful at this time, the uplink/downlink antenna bitmap is maintained at "01111001", and then the result of the downlink correction is that the rank of the antenna with 1 failure is reduced (i.e., the antenna 7).
Further, in this embodiment, after step S30, the method further includes:
when the antenna correction in the first direction is triggered again, removing the mark of the fault channel in the first direction at the last time;
and performing antenna correction of the first direction on the first direction channel which is not marked currently.
In this embodiment, it is taken as an example that after the base station completes the downlink correction initiated by responding to the user operation, the base station actively triggers to perform the antenna correction again.
As described in the first embodiment, the base station first performs uplink correction, and at this time, the last dyed uplink channel is removed from dyeing, that is, the uplink antenna bitmap is changed from "01111001" to "01111111", and it can be seen that the failed channel that has been previously subjected to downlink correction inherits into the uplink correction of this time. And after the dyeing removing operation is finished, opening the antenna corresponding to the dyeing removing channel.
And then, performing antenna correction on the undyed uplink channel, namely performing antenna correction on the uplink channels of antennas from 0 to 6, if the uplink channel with the fault is not detected, namely the correction is successful, no newly added uplink channel needs to be dyed, and the uplink antenna bitmap is maintained to be '01111111', so that the uplink correction recovers the uplink fault channels of 1 and 2 found in the uplink correction at the last time, namely the rank is increased by two antennas. In addition, when no new channel is dyed in the uplink correction, the downlink channel corresponding to the uplink fault channel without dyeing is removed.
Similarly, when performing the automatically triggered downlink correction, the downlink channel that is dyed last time is removed from dyeing, that is, the downlink antenna bitmap is changed from "01111111" to "11111111", and if it is detected that the downlink channels of the antennas No. 4, 5, and 6 are faulty channels at this time, the faulty channels are dyed, that is, the downlink antenna bitmap is changed from "11111111" to "10001111". And then, performing downlink correction on downlink channels outside the fault channel, namely performing downlink correction on the downlink channels of antennas 0, 1, 2, 3 and 7, wherein the correction is successful at this time, and the downlink antenna bitmap is maintained to be '10001111', so that the downlink correction result is that 4, 5 and 6 antennas are removed by rank reduction.
Finally, the base station responds to the user operation to perform uplink correction, and since no channel is dyed in the uplink correction performed last time, the uplink antenna bitmap is maintained to be "10001111" at this time. If the uplink channel fault of the antenna No. 2 is detected, dyeing operation is carried out, the obtained uplink/downlink antenna bitmaps are all '10001011', and the uplink correction initiated manually at this time is that 1 antenna is removed in rank reduction.
Based on the above description, the scheme of the present invention can be summarized as follows: when the base station executes the uplink correction, the fault channel detected in the previous downlink correction is directly inherited to the uplink correction of the time, and the uplink correction is carried out again. Similarly, the downlink is also processed in such a way that when the downlink correction is carried out, a fault channel detected by the uplink correction is removed, and then the downlink correction is carried out again. When the uplink/downlink correction channel inherits the previous uplink/downlink correction fault channel, if no newly-added fault channel is found, the next uplink/downlink correction does not need to reject the current fault channel, namely the fault channel is not inherited at intervals (namely, only the newly-added fault channel is rejected, and the fault channel found in history is not rejected); and when the next uplink/downlink correction does not find the fault channel or the found fault channel is different from the fault channel removed at this time, the rank is increased.
Further, based on the foregoing first or second embodiment, a third embodiment of the antenna calibration method of the present invention is provided, and in this embodiment, the method further includes:
and counting the times of antenna correction, and outputting first preset alarm information when the counted times of antenna correction is greater than or equal to the preset times.
It should be noted that, in order to further ensure the performance stability of the antenna system, the embodiment of the present invention adds a scheme for limiting the number of times of antenna calibration and performing an alarm operation, which is only described below, and other embodiments may refer to the foregoing embodiments, and are not described herein again.
In the embodiment of the present invention, a Flag is preset to record the number of times of antenna calibration, and a preset number of times of representing an antenna system fault is also preset (specifically, the Flag may be set by a person skilled in the art according to actual needs, and the embodiment of the present invention is not limited specifically).
In specific implementation, when antenna correction (which may be uplink correction or downlink correction) is performed for the first time, the number Flag of antenna correction is cleared, the effective channel information is updated, and if a reference channel (a limited number of channels are selected according to an algorithm as reference channels for antenna correction) has a fault, another good channel is reselected as the reference channel. And then, when antenna correction (including uplink correction and downlink correction) is performed each time, adding 1 to the Flag, and judging whether the Flag is greater than or equal to a preset number of times, if so, indicating that the antenna system fails, and outputting first preset alarm information for prompting a network manager that the current antenna system fails, for example, outputting the first preset alarm information as 'the current correction number is too many, and please check the antenna failure'. In addition, when the first preset alarm information is output, the current antenna correction process is ended, and correction is not continued.
Further, in this embodiment, it is further determined whether the number of the reference channels is greater than or equal to a preset number, and if so, it is determined that the antenna system has a fault, and third preset alarm information is output.
For example, the third preset alarm information is output as "the current reference channel with faults is too much, please check the antenna faults".
In addition, when the third preset alarm information is output, the current antenna correction process is also ended, and the correction is not continued.
Further, based on the foregoing first or second embodiment, a fourth embodiment of the antenna calibration method of the present invention is provided, and in this embodiment, the method further includes:
and counting the number of the dyed channels in the first direction or the second direction, and outputting second preset alarm information when the number of the dyed channels in any direction is greater than or equal to a preset number.
It should be noted that, in order to further ensure the performance stability of the antenna system, the embodiment of the present invention adds a scheme for limiting the number of fault channels that can be corrected by the antenna and performing an alarm operation, which is only described below, and other embodiments may refer to the foregoing embodiments, and are not described here again.
In specific implementation, when channels in any direction are dyed each time, whether the number of the dyed channels in the direction is greater than or equal to the preset number is judged, if yes, second preset alarm information is output, the current antenna correction process is ended, and correction is not continued. The preset number is not specifically limited in the embodiments of the present invention, and may be set by those skilled in the art according to actual needs.
Further, the present invention also provides an antenna calibration apparatus, which is applied to the base station shown in fig. 1, and corresponds to the first embodiment of the antenna calibration method described above, referring to fig. 3, in the first embodiment of the antenna calibration apparatus of the present invention, the antenna calibration apparatus includes:
a marking module 10, configured to mark a faulty channel in a first direction if the faulty channel in the first direction is detected when triggering antenna calibration in the first direction, and mark a second direction channel corresponding to the faulty channel in the first direction, where when the first direction is an uplink direction, the second direction is a downlink direction, or when the first direction is a downlink direction, the second direction is an uplink direction;
the calibration module 20 is configured to close the marked channel and perform antenna calibration in a first direction on other channels in the first direction that are not marked;
the calibration module 20 is further configured to perform antenna calibration in the second direction on the unmarked second direction channel when triggering antenna calibration in the second direction.
In a large-scale mimo antenna system, due to the large number of antennas, the number of antennas in a conventional antenna system is at least 64, and even the number of antennas is multiplied. In the face of such a large number of antennas, it is particularly important to avoid the traffic being affected by factors that make corrections impossible due to the damage of a small number of antenna channels. The inventor considers through the algorithm research that: because the antenna system comprises a plurality of antennas, for a small number of channel faults, the service can also operate normally after the small number of fault channels are eliminated. Based on this, the present invention is proposed and will be described in detail below.
The inventor believes through research that: although the antenna corrections in the uplink direction and the downlink direction are performed independently, when the uplink channel is damaged, the SRS (Sounding Reference Signal, which is used for estimating the uplink channel and performing downlink beamforming) cannot be obtained, and the downlink channel cannot be used; when the downlink channel is damaged, the correction weight calculated according to the SRS is wasted, namely no channel is issued. Therefore, in the embodiment of the present invention, when one of a group of parallel uplink channels and downlink channels has a fault, the group of parallel uplink channels and downlink channels are simultaneously determined as a fault, and cannot be used for antenna correction; only when the states of the group of parallel uplink channels and the group of parallel downlink channels are good (namely, a plurality of indexes such as signal-to-noise ratios and the like are within a preset threshold, the channel states are considered to be good), the group of parallel uplink channels and the group of parallel downlink channels can be used in antenna correction.
It should be noted that the antenna calibration initiated by the antenna calibration apparatus is uplink first and downlink later, and the manually initiated calibration may also be performed alone for uplink antenna calibration or downlink antenna calibration. In this embodiment, the first 8 antennas of the antenna system are taken as a representative, the first direction is an uplink direction, the second direction is a downlink direction, and the antenna calibration device actively triggers the antenna calibration to perform antenna calibration. In addition, for the case that the first direction is a downlink direction and the second direction is an uplink direction, those skilled in the art can refer to the implementation according to the following description of the embodiment of the present invention.
In this embodiment, after the base station is started, the calibration module 20 monitors indexes such as service traffic in real time, and determines whether the indexes are lower than corresponding preset thresholds (e.g., determines whether the real-time service traffic is smaller than the preset service traffic), and if so, triggers antenna calibration to achieve a target of real-time automatic adjustment, so as to meet the characteristics of rapid change and timely shaping of multiple channels.
In the following description, an "antenna bitmap" is used to indicate a failure state of uplink/downlink antenna channels in an antenna system, where a bit is used to indicate an antenna channel state, a bit of "0" indicates that the channel state is a failure, and a bit of "1" indicates that the channel state is good, for example, the first 8 antennas in the antenna system are taken as an example (the same applies to other antennas), if uplink channel states of 8 antennas are all good, the uplink antenna bitmap is "11111111", and if uplink channel states of two antennas, i.e., antenna No. 1 and antenna No. 2, in the 8 antennas are a failure, the uplink antenna bitmap is "11111001".
When the uplink correction is just started, because the downlink correction has not occurred yet, at this time, the uplink antenna bitmap defaults to "11111111" (it indicates that the uplink channel states of 8 antennas are all good), the correction module 20 first detects whether there is a failed channel in the uplink direction, that is, determines whether there are multiple indexes such as the signal-to-noise ratio of the uplink channel and the like exceeding a preset threshold value, and if so, determines that the corresponding uplink channel is the failed channel.
At this time, assuming that the uplink channels of two antennas, that is, antenna number 1 and antenna number 2, are faulty, the marking module 10 needs to mark the uplink channels of two antennas, that is, antenna number 1 and antenna number 2, and the corresponding downlink channels, and in a specific implementation, based on the previous description about the faulty channel, it can be understood by those skilled in the art that, in the embodiment of the present invention, a bit is used to indicate whether a channel is faulty, therefore, the marking module 10 implements marking of a channel by "dyeing" (in the following description, the dyeing is equivalent to the marking), specifically, the marking module 10 changes "1" representing a good state to "0" representing a faulty state, and because the uplink channels of two antennas, that is, at this time, the uplink antenna bitmap after dyeing is changed from "11111111111" to "11111001", and similarly, the downlink antenna bitmap after dyeing is changed from "11111111111" to "11111001", the uplink correction result is to reduce the rank of two faulty antennas.
After the marking module 10 finishes channel dyeing, the calibration module 20 closes the antenna corresponding to the dyed channel (i.e., closes the faulty uplink channel and its corresponding downlink channel), and performs uplink antenna calibration on other uplink channels except for the faulty channel, that is, performs uplink antenna calibration on the uplink channels that are not dyed (here, the uplink channels of antennas 0, 3, 4, 5, 6, and 7). In addition, it should be noted that when a faulty channel is detected, antenna correction may be performed on other channels outside the faulty channel, and then dyeing is performed according to the faulty channel; or dyeing according to the fault channel and then carrying out antenna correction on other channels outside the fault channel.
After the antenna correction in the uplink direction is completed, the correction module 20 performs downlink correction, and since two channels are dyed after the uplink correction, the two dyeing channels in the uplink direction are inherited before the downlink correction, the bitmap of the downlink antenna at this time is "11111001", if the correction is successful at this time, a fault channel in the downlink direction does not exist, and the bitmap is maintained as "11111001", it can be seen that, after the uplink and downlink correction is successful, the bitmaps of the effective antenna channels in the uplink and downlink should be consistent, so that the consistency of the amplitude and the phase of each channel after the antenna correction is ensured, and the purpose of reducing the rank by closing the corresponding fault channel is also ensured, so that the service shaping effect is not influenced, and the performance stability of the antenna system is improved.
Further, in this embodiment, the antenna calibration apparatus further includes:
and a recording module (not shown in fig. 3) for recording the correction weights in the first direction and the second direction respectively, so as to compensate the radio frequency signals in the first direction and the second direction.
In this embodiment, after the calibration module 20 completes the antenna calibration in the uplink/downlink direction, the recording module records the calibration weights in the two directions, so that when the uplink/downlink radio frequency signals are transmitted later, the calibration weights in the corresponding directions can be used to compensate the radio frequency signals, thereby ensuring the service shaping effect.
The antenna correction device provided by the invention is applied to a base station, so that when the base station triggers the antenna correction in one direction, if a fault channel exists in the direction, the fault channels are eliminated in a marking mode, the fault channel and the channel in the other direction corresponding to the fault channel are specifically marked, and the antenna correction in the direction is carried out on a normal channel except the fault channel, so that when the antenna correction in the other direction is triggered, the antenna correction is carried out only on the channel which is not marked in the direction, the problem that the antenna correction fails due to the fault of a small number of antenna channels in an antenna system is avoided, and the performance stability of the antenna system is improved.
Further, based on the first embodiment, a second embodiment of the antenna calibration apparatus of the present invention is proposed, which corresponds to the second embodiment of the aforementioned antenna calibration method, in this embodiment, the marking module 10 is further configured to mark, when triggering antenna calibration in the second direction, a faulty channel in the second direction and mark a first-direction channel corresponding to the faulty channel in the second direction if the faulty channel in the second direction is detected;
the calibration module 20 is further configured to close the marked channel and perform antenna calibration in the second direction on the unmarked other second direction channels.
In this embodiment, an antenna calibration apparatus actively triggers antenna calibration, and after completing antenna calibration in the uplink direction, the antenna calibration apparatus initiates downlink calibration in response to user operation.
The downlink correction of this time still combines the channels 1 and 2 dyed in the previous uplink correction, that is, the downlink antenna bitmap at this time is "11111001", if it is detected that the downlink channel of the antenna 7 is a failed channel, the marking module 10 dyes and marks the downlink channel of the antenna 7, the downlink antenna bitmap is changed from "11111001" to "01111001", then the correction module 20 closes the currently dyed channel, and performs downlink correction on the undyed downlink channel, that is, performs downlink correction on the downlink channels of the antennas 0, 3, 4, 5, and 6, at this time, the correction is successful, the uplink/downlink antenna bitmap is maintained at "01111001", and the result of the downlink correction of this time is to reduce the number of antennas with 1 failure (that is, the antenna 7).
Further, the marking module 10 is further configured to remove the previous mark of the faulty channel in the first direction when triggering the antenna calibration in the first direction again;
the calibration module 20 is further configured to perform a first-direction antenna calibration on a currently unmarked first-direction channel.
In this embodiment, for example, after the antenna calibration apparatus completes downlink calibration initiated in response to user operation, it actively triggers antenna calibration again.
As described in the first embodiment, the uplink correction is performed first, and at this time, the marking module 10 removes the staining from the last stained uplink channel, that is, the uplink antenna bitmap is changed from "01111001" to "01111111", and it can be seen that the failed channel that was previously subjected to the downlink correction is inherited into the uplink correction of this time. After the depainting operation is completed, the calibration module 20 starts the antenna corresponding to the depainted channel.
Then, the correction module 20 performs antenna correction on the uplink channel which is not dyed, that is, performs antenna correction on the uplink channels of antennas 0 to 6, if the uplink channel which is not detected to have a fault is not detected, that is, the correction is successful, no new uplink channel needs to be dyed, the uplink antenna bitmap is maintained as "01111111", and it can be seen that the uplink correction of this time restores the uplink fault channels of 1 and 2 found in the uplink correction of the last time, that is, ranks up two antennas. In addition, when no new channel is dyed in the upstream correction, the marking module 10 removes the dyeing from the downstream channel corresponding to the upstream faulty channel from which the dyeing is removed.
Similarly, when performing the automatically triggered downlink correction, the marking module 10 removes the dyeing from the downlink channel that was dyed last time, that is, changes the downlink antenna bitmap from "01111111" to "11111111", and if it is detected that the downlink channels of antennas No. 4, 5, and 6 are faulty channels at this time, dyes the faulty channels, that is, changes the downlink antenna bitmap from "11111111" to "10001111". Then, the correction module 20 performs downlink correction on the downlink channel outside the failed channel, that is, performs downlink correction on the downlink channels of antennas 0, 1, 2, 3, and 7, at this time, the correction is successful, and the downlink antenna bitmap is maintained as "10001111", so that the result of the downlink correction is that 4, 5, and 6 antennas are removed by rank reduction.
Finally, the calibration module 20 performs uplink calibration in response to user operation, and since no channel is dyed in the uplink calibration performed last time, the uplink antenna bitmap is maintained as "10001111". If the uplink channel fault of the antenna No. 2 is detected, dyeing operation is carried out, the obtained uplink/downlink antenna bitmaps are all '10001011', and the uplink correction initiated manually at this time is that 1 antenna is removed in rank reduction.
Based on the above description, the scheme of the present invention can be summarized as follows: when the base station (based on the function of the antenna correction device) executes the uplink correction, the fault channel detected in the previous downlink correction is directly transmitted to the current uplink correction, and the uplink correction is carried out again. Similarly, the downlink is also processed in such a way that when the downlink correction is performed, the faulty channel detected by the uplink correction is removed, and then the downlink correction is performed again. When the uplink/downlink correction channel inherits the previous uplink/downlink correction fault channel, if no newly-added fault channel is found, the next uplink/downlink correction does not need to reject the current fault channel, namely the fault channel is not inherited at intervals (namely, only the newly-added fault channel is rejected, and the fault channel found in history is not rejected); and when the next uplink/downlink correction does not find the fault channel or the found fault channel is different from the fault channel removed at this time, the rank is increased.
Further, based on the first or second embodiment, a third embodiment of the antenna calibration device of the present invention is proposed, which corresponds to the third embodiment of the aforementioned antenna calibration method, in this embodiment, the antenna calibration device further includes:
the first alarm module is used for counting the times of antenna correction and outputting first preset alarm information when the counted times of antenna correction is greater than or equal to the preset times.
It should be noted that, in order to further ensure the performance stability of the antenna system, the embodiment of the present invention adds a scheme for limiting the number of times of antenna calibration and performing an alarm operation, which is only described below, and other embodiments may refer to the foregoing embodiments, and are not described herein again.
In the embodiment of the present invention, a Flag is preset to record the number of times of antenna calibration, and a preset number of times of representing an antenna system fault is also preset (specifically, the Flag may be set by a person skilled in the art according to actual needs, and the embodiment of the present invention is not limited specifically).
In specific implementation, when antenna correction (which may be uplink correction or downlink correction) is performed for the first time, the first alarm module clears the number Flag of antenna correction, and meanwhile, the correction module 20 updates effective channel information, and if a reference channel (a limited number of channels are selected according to an algorithm as reference channels for antenna correction) has a fault, reselects another good channel as the reference channel. And then, when antenna correction (including uplink correction and downlink correction) is performed each time, the first alarm module adds 1 to the Flag, and judges whether the Flag is greater than or equal to a preset number of times, if so, the antenna system fault is indicated, and at the moment, first preset alarm information is output to prompt a webmaster of the current antenna system fault, for example, the first alarm module outputs the first preset alarm information that the current correction number of times is too large, and the antenna fault is required to be checked. In addition, when the first preset alarm information is output, the first alarm module also ends the current antenna correction process and does not continue to correct.
Further, in this embodiment, the first alarm module is further configured to determine whether the number of the reference channels is greater than or equal to a preset number, and if so, determine that the antenna system fails, and output third preset alarm information.
For example, the first alarm module outputs third preset alarm information that "the current fault references too many channels, please check the antenna fault".
In addition, when the third preset alarm information is output, the first alarm module also ends the current antenna correction process and does not continue to correct.
Further, based on the first or second embodiment, a fourth embodiment of the antenna calibration device of the present invention is provided, which corresponds to the fourth embodiment of the antenna calibration method, in this embodiment, the antenna calibration device further includes a second alarm module, configured to count the number of channels dyed in the first direction or the second direction, and output second preset alarm information when the number of channels dyed in any direction is greater than or equal to a preset number.
It should be noted that, in order to further ensure the performance stability of the antenna system, the embodiment of the present invention adds a scheme for limiting the number of fault channels that can be corrected by the antenna and performing an alarm operation, which is only described below, and other embodiments may refer to the foregoing embodiments, and are not described here again.
In specific implementation, when the marking module 10 dyes the channels in any direction each time, the second alarm module judges whether the number of the dyed channels in the direction is greater than or equal to the preset number, if so, the second alarm module outputs second preset alarm information, ends the currently performed antenna correction process, and does not continue to perform correction. The preset number is not specifically limited in the embodiments of the present invention, and may be set by those skilled in the art according to actual needs.
Further, the present invention also provides a computer-readable storage medium, which stores an antenna calibration program in an embodiment, and when the antenna calibration program is executed by the processor 1001, the antenna calibration program implements the following operations:
when triggering antenna correction in a first direction, if a fault channel in the first direction is detected, marking the fault channel in the first direction and marking a second direction channel corresponding to the fault channel in the first direction, wherein when the first direction is an uplink direction, the second direction is a downlink direction or when the first direction is a downlink direction, the second direction is an uplink direction;
closing the marked channel and performing antenna correction in the first direction on the unmarked other channels in the first direction;
and when triggering the antenna correction in the second direction, performing the antenna correction in the second direction on the unmarked second direction channel.
Further, when the antenna calibration program is executed by the processor 1001, the following operations are also implemented:
when the antenna correction in the second direction is triggered, if a fault channel in the second direction is detected, marking the fault channel in the second direction and marking a first direction channel corresponding to the fault channel in the second direction;
the marked channel is closed and antenna corrections in the second direction are made to the other second direction channels that are not marked.
Further, when the antenna calibration program is executed by the processor 1001, the following operations are also implemented:
when the antenna correction in the first direction is triggered again, removing the mark of the fault channel in the first direction at the last time;
and performing antenna correction of the first direction on the first direction channel which is not marked currently.
Further, when the antenna calibration program is executed by the processor 1001, the following operations are also implemented:
and counting the times of antenna correction, and outputting first preset alarm information when the counted times of antenna correction is greater than or equal to the preset times.
Further, when the antenna calibration program is executed by the processor 1001, the following operations are also implemented:
and counting the number of the dyed channels in the first direction or the second direction, and outputting second preset alarm information when the number of the dyed channels in any direction is greater than or equal to a preset number.
Further, when the antenna calibration program is executed by the processor 1001, the following operations are also implemented:
and respectively recording the correction weights of the first direction and the second direction for compensating the radio frequency signals of the first direction and the second direction.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solution of the present invention essentially or contributing to the prior art can be embodied in the form of a software product, which is stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for causing a base station to execute the method according to the corresponding embodiment of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. An antenna calibration method, characterized in that the antenna calibration method comprises the steps of:
when triggering antenna correction in a first direction, if a fault channel in the first direction is detected, marking the fault channel in the first direction and marking a second direction channel corresponding to the fault channel in the first direction, wherein when the first direction is an uplink direction, the second direction is a downlink direction or when the first direction is a downlink direction, the second direction is an uplink direction;
closing the marked channel and performing antenna correction in the first direction on the unmarked other channels in the first direction;
when the antenna correction in the second direction is triggered, if a fault channel in the second direction is detected, marking the fault channel in the second direction and marking a first direction channel corresponding to the fault channel in the second direction;
closing the marked channel and performing antenna correction in a second direction on other second direction channels which are not marked;
when the antenna correction in the first direction is triggered again, removing the mark of the fault channel in the first direction at the last time, and inheriting the fault channel in the second direction to the antenna correction in the first direction at the present time;
and performing antenna correction of the first direction on the first direction channel which is not marked currently.
2. The antenna calibration method of claim 1, further comprising:
and counting the times of antenna correction, and outputting first preset alarm information when the counted times of antenna correction is greater than or equal to the preset times.
3. The antenna calibration method of any one of claims 1-2, further comprising:
and counting the number of the dyed channels in the first direction or the second direction, and outputting second preset alarm information when the number of the dyed channels in any direction is greater than or equal to a preset number.
4. The antenna calibration method of any one of claims 1-2, further comprising:
and respectively recording the correction weights of the first direction and the second direction for compensating the radio frequency signals of the first direction and the second direction.
5. An antenna calibration device, the antenna calibration device comprising:
the system comprises a marking module, a judging module and a control module, wherein the marking module is used for marking a fault channel in a first direction and marking a second direction channel corresponding to the fault channel in the first direction if the fault channel in the first direction is detected when triggering antenna correction in the first direction, and the second direction is an uplink direction when the first direction is an uplink direction and is a downlink direction or is a downlink direction when the first direction is a downlink direction;
the correction module is used for closing the marked channel and performing antenna correction in the first direction on the unmarked other channels in the first direction;
the correction module is further configured to mark the faulty channel in the second direction and mark the first-direction channel corresponding to the faulty channel in the second direction if the faulty channel in the second direction is detected when triggering antenna correction in the second direction; closing the marked channel and performing antenna correction in a second direction on other second direction channels which are not marked; when the antenna correction in the first direction is triggered again, removing the mark of the fault channel in the first direction at the last time, and inheriting the fault channel in the second direction to the antenna correction in the first direction at the present time; and performing antenna correction of the first direction on the first direction channel which is not marked currently.
6. A base station, characterized in that the base station comprises:
a memory storing an antenna calibration program;
a processor in communication with the memory and configured to execute the antenna calibration procedure to implement the steps of:
when triggering antenna correction in a first direction, if a fault channel in the first direction is detected, marking the fault channel in the first direction and marking a second direction channel corresponding to the fault channel in the first direction, wherein when the first direction is an uplink direction, the second direction is a downlink direction or when the first direction is a downlink direction, the second direction is an uplink direction;
closing the marked channel and performing antenna correction in the first direction on the unmarked other channels in the first direction;
when the antenna correction in the second direction is triggered, if a fault channel in the second direction is detected, marking the fault channel in the second direction and marking a first direction channel corresponding to the fault channel in the second direction;
closing the marked channel and performing antenna correction in a second direction on other second direction channels which are not marked;
when the antenna correction in the first direction is triggered again, removing the mark of the fault channel in the first direction at the last time, and inheriting the fault channel in the second direction to the antenna correction in the first direction at the present time;
and performing antenna correction of the first direction on the first direction channel which is not marked currently.
7. A computer-readable storage medium having stored thereon an antenna calibration program, which when executed by a processor, performs the steps of:
when triggering antenna correction in a first direction, if a fault channel in the first direction is detected, marking the fault channel in the first direction and marking a second direction channel corresponding to the fault channel in the first direction, wherein when the first direction is an uplink direction, the second direction is a downlink direction or when the first direction is a downlink direction, the second direction is an uplink direction;
closing the marked channel and performing antenna correction in the first direction on the unmarked other channels in the first direction;
upon triggering the antenna calibration in the second direction,
if the fault channel in the second direction is detected, marking the fault channel in the second direction and marking a first direction channel corresponding to the fault channel in the second direction;
closing the marked channel and performing antenna correction in a second direction on other second direction channels which are not marked;
when the antenna correction in the first direction is triggered again, removing the mark of the fault channel in the first direction at the last time, and inheriting the fault channel in the second direction to the antenna correction in the first direction at the present time;
and performing antenna correction of the first direction on the first direction channel which is not marked currently.
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