CN109479205B - Antenna calibration method, device and base station - Google Patents
Antenna calibration method, device and base station Download PDFInfo
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- CN109479205B CN109479205B CN201680087752.3A CN201680087752A CN109479205B CN 109479205 B CN109479205 B CN 109479205B CN 201680087752 A CN201680087752 A CN 201680087752A CN 109479205 B CN109479205 B CN 109479205B
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Abstract
The embodiment of the invention provides an antenna calibration method, an antenna calibration device and a base station, wherein the method comprises the following steps: a base station determines the position and the duration of a silent time slot, wherein the base station and a terminal in the silent time slot do not transmit and receive signals; and the base station carries out antenna calibration in the silent time slot. By adopting the antenna calibration method, the antenna calibration device and the base station provided by the embodiment of the invention, the calibration sequence in the receiving channel can be prevented from being interfered by external signals in the antenna calibration process of the base station, and the antenna calibration precision is ensured.
Description
Technical Field
The present invention relates to wireless communication technologies, and in particular, to an antenna calibration method, an antenna calibration device, and a base station.
Background
In a wireless communication system, for a Time Division Duplex (TDD) base station system, since an uplink and a downlink use the same carrier frequency, theoretically, an uplink physical propagation channel and a downlink physical propagation channel may have reciprocity. However, in the actual implementation process, two sets of circuits are required for the rf end of each antenna to respectively complete the transmission and reception of signals. Due to the process error in hardware, the nonlinear distortion of the amplifier, and the influence of the operating frequency, time, and external environment (such as temperature, humidity, etc.) on the characteristic response of each rf circuit, it is difficult to achieve that two sets of circuits at the rf end have completely consistent characteristics. Therefore, for the baseband signal, the transmission channel and the reception channel equivalently multiply the channels by different coefficients, resulting in impaired reciprocity of the channels. In order to eliminate the influence of the deviation between the receiving channel and the transmitting channel of each rf end on the channel and ensure the reciprocity of the rf channels, the rf channels need to be calibrated to ensure the consistency of the amplitude and phase of the rf transmitting channels of a plurality of Remote rf modules (Radio Remote units, RRUs for short).
In the prior art, a method for calibrating a radio frequency channel includes: the base station system sends the same receiving channel correction sequence to each radio frequency end through a reference transmitting channel, each receiving channel of the base station system calculates the correction coefficient of the corresponding receiving channel according to the receiving channel correction sequence after receiving the receiving channel correction sequence, and carries out amplitude phase calibration on the corresponding receiving channel according to the correction coefficient.
Since the calibration process of the radio frequency channel is completed according to the calibration sequence of the receiving channel received by the base station system, if the calibration time is up, the receiving channel of the base station system also receives other external signal inputs, for example, the UE sends an uplink signal, which may cause the signal-to-noise ratio of the calibration sequence in the receiving channel of the base station to decrease, resulting in the decrease of the calibration accuracy and even the failure of calibration.
Disclosure of Invention
The embodiment of the invention provides an antenna calibration method, an antenna calibration device and a base station, which are used for solving the technical problem of low calibration precision when a base station system carries out antenna calibration in the prior art. In a first aspect, an embodiment of the present invention provides an antenna calibration method, where the method includes:
the base station determines the position and the duration of the silent time slot, wherein the base station and the terminal do not transmit and receive signals in the silent time slot; the base station carries out antenna calibration in the silent time slot, thereby preventing the calibration sequence in the receiving channel from being interfered by external signals in the process of carrying out antenna calibration by the base station and ensuring the accuracy of antenna calibration.
Optionally, the determining, by the base station, the position and duration of the silence slot includes: the base station acquires antenna calibration requirements; and the base station determines the position and the duration of the silent time slot according to the antenna calibration requirement.
The base station determines the silent time slot according to the antenna calibration requirement, and can effectively utilize time slot resources to normally receive and transmit signals while ensuring the calibration precision.
Optionally, after the base station determines the position and duration of the silence timeslot, the method further includes: the base station sends indication information to the terminal, wherein the indication information comprises: the location and duration of the silent slot.
Optionally, the sending, by the base station, the indication information to the terminal includes:
and the base station sends the indication information to the terminal at a preset time length position before the starting time of the silent time slot.
The base station sends indication information to the terminal before the silent time slot, thereby ensuring that the terminal can stop sending and receiving signals in the silent time slot.
Optionally, the method further comprises: the base station determines an occurrence period of the silent slot. And the occurrence period of the silent time slot is determined, so that the base station system and the terminal periodically keep silent, and the base station system is used for periodically calibrating the antenna.
Optionally, the duration of the silent timeslot is greater than the duration of the preset guard interval GP, so that it can be ensured that the base station system has sufficient antenna calibration time, and the calibration process is successfully completed.
In a second aspect, an embodiment of the present invention further provides an antenna calibration apparatus, including:
a determining module, configured to determine a position and a duration of a silent timeslot, where neither the antenna calibration apparatus nor the terminal in the silent timeslot can transmit and receive signals;
and the calibration module is used for carrying out antenna calibration in the silent time slot.
Optionally, the determining module is specifically configured to:
acquiring an antenna calibration requirement parameter;
and determining the position and the duration of the silent time slot according to the antenna calibration requirement parameters.
Optionally, the apparatus further comprises:
a sending module, configured to send, after the determining module determines the position and duration of the silence timeslot, indication information to the terminal, where the indication information includes: the location and duration of the silent slot.
Optionally, the sending module is specifically configured to:
and the base station sends the indication information to the terminal at a preset time length position before the starting time of the silent time slot.
Optionally, the determining module is further configured to:
determining an occurrence period of the silent slots.
Optionally, the duration of the silence timeslot is greater than the duration of a preset guard interval GP.
The antenna calibration apparatus provided by the second aspect is used for performing the antenna calibration method provided by the first aspect, and the technical effect is similar to that of the antenna calibration method.
In a third aspect, an embodiment of the present invention further provides a base station, including:
a processor, configured to determine a position and a duration of a silence timeslot, where neither the antenna calibration apparatus nor a terminal in the silence timeslot can transmit and receive signals;
the processor is further configured to perform antenna calibration within the silent time slot.
Optionally, the processor is specifically configured to:
acquiring an antenna calibration requirement parameter;
and determining the position and the duration of the silent time slot according to the antenna calibration requirement parameters.
Optionally, the base station further includes:
a transmitter, configured to send, after the processor determines the position and duration of the silence slot, indication information to the terminal, where the indication information includes: the location and duration of the silent slot.
Optionally, the transmitter is specifically configured to:
and sending the indication information to the terminal at a preset time length position before the starting time of the silent time slot.
Optionally, the processor is further configured to:
determining an occurrence period of the silent slots.
Optionally, the duration of the silence timeslot is greater than the duration of a preset guard interval GP.
The base station provided by the third aspect is configured to perform the antenna calibration method provided by the first aspect, and the technical effect is similar to that of the antenna calibration method.
In a fourth aspect, an embodiment of the present invention further provides a base station, which includes a processor and a memory, where the memory stores program instructions, and the processor is configured to call the program instructions in the memory, so as to implement the antenna calibration method provided in the first aspect.
According to the antenna calibration method, the antenna calibration device and the base station provided by the embodiment of the invention, the base station determines the position and the duration of the silent time slot, the base station and the terminal do not transmit and receive signals in the silent time slot, and the base station performs antenna calibration in the silent time slot, so that the calibration sequence in a receiving channel is prevented from being interfered by external signals in the antenna calibration process of the base station, and the accuracy of antenna calibration is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flowchart of an antenna calibration method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a calibration time slot determined by the antenna calibration method according to the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a Transmission Time Interval (TTI) according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a base station scheduling configuration of silent slots according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a base station determining a silence slot occurrence period according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a calibration structure of a radio frequency channel of a base station system according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of an antenna calibration apparatus according to an embodiment of the present invention;
FIG. 8 is a diagram illustrating a base station according to an embodiment of the present invention;
fig. 9 is another schematic structural diagram of a base station according to an embodiment of the present invention.
Detailed Description
In order to eliminate the influence of the deviation between the receiving channel and the transmitting channel of each rf end on the channel in the wireless communication process and ensure the reciprocity of the rf channels, the base station system generally needs to calibrate the rf channels to ensure the consistency of the amplitude and the phase of the rf transmitting channels of a plurality of Remote Radio modules (Radio Remote units, RRUs for short). In order to prevent a base station system from receiving other external signal inputs in a radio frequency channel calibration process, which may result in reduced calibration precision or even failed calibration, embodiments of the present invention provide an antenna calibration method, an antenna calibration device, and a base station, which are used to ensure that the calibration process is successfully completed.
Fig. 1 is a schematic flowchart of an antenna calibration method according to an embodiment of the present invention, and fig. 2 is a schematic diagram of a calibration time slot determined by the antenna calibration method according to the embodiment of the present invention.
Referring to fig. 1 and fig. 2, an embodiment of the present invention provides an antenna calibration method, where an execution subject of the antenna calibration method is a base station. The method comprises the following steps:
s101: the base station determines the position and the duration of a silent time slot, wherein the base station and the terminal do not transmit and receive signals in the silent time slot.
Specifically, the base station determines a normal service time slot and a silent time slot of a wireless frame, wherein the base station can send a downlink signal in the normal service time slot or receive an uplink signal; the base station neither transmits nor receives signals in the silent slots.
In a specific implementation process, the determining the position and duration of the silence timeslot includes:
the base station acquires antenna calibration requirements;
and the base station determines the position and the duration of the silent time slot according to the antenna calibration requirement.
Specifically, the base station may obtain the antenna calibration requirement by monitoring a variation of a characteristic parameter of the base station system. The characteristic parameters of the base station system may be the operating frequency of the radio frequency circuit or the temperature and humidity of the external environment. And when the change condition of the characteristic parameters exceeds a preset threshold value, sending an antenna calibration requirement.
After the base station determines the position and the duration of the silent slot, the method further comprises the following steps:
the base station sends indication information to the terminal, wherein the indication information comprises: the location and duration of the silent slot.
Fig. 3 is a schematic diagram of a Transmission Time Interval (TTI) structure according to an embodiment of the present invention, and fig. 4 is a schematic diagram of a base station scheduling configuration of a silence slot according to an embodiment of the present invention.
Referring to fig. 3, the silence slot may be a part of a specific TTI or an entire TTI slot segment.
Referring to fig. 4, specifically, after the base station obtains the antenna calibration requirement, the base station sends downlink control indication information to the terminal through a downlink control channel, indicates that the terminal keeps silent in the silent time slot, and stops sending signals to the base station and receiving signals from the base station.
Further, on the basis of the foregoing embodiment, the sending, by the base station, the indication information to the terminal includes:
and the base station sends the indication information to the terminal at a preset time length position before the starting time of the silent time slot.
The base station sends indication information to the terminal before the silent time slot, thereby ensuring that the terminal can stop sending and receiving signals in the silent time slot.
Through the embodiment, the base station can determine the position and the duration of the silent time slot in real time according to the correction requirement, so that when the base station system does not need to perform antenna calibration, more time slots can be used for normally receiving and transmitting data, and system scheduling resources are saved while the base station system is ensured to be capable of accurately calibrating the antenna.
Optionally, the base station system may further determine an occurrence period of the silent slot. And the occurrence period of the silent time slot is determined, so that the base station system and the terminal periodically keep silent, and the base station system is used for periodically calibrating the antenna.
Optionally, the duration of the silence timeslot is greater than the duration of a preset guard interval GP. The time length of the silent time slot is set to be longer than the time length of the preset guard interval GP, so that the base station system can be ensured to have enough antenna calibration time, and the calibration process can be ensured to be completed smoothly.
Fig. 5 is a diagram illustrating a base station determining a silent slot occurrence period according to an embodiment of the present invention.
Referring to fig. 5, specifically, the base station system may determine a fixed position of a timeslot entering a silent state, and enter the silent state at the fixed position of the timeslot according to an appearance period of the silent timeslot, and the base station and the terminal stop transmitting and receiving signals at the same time. The period of occurrence of the silent slots may be specified by a protocol. The period may be any duration, for example: 1024 minutes, 30 minutes, etc. Specifically, the setting may be performed in advance according to the antenna performance of the base station system.
S102: and the base station carries out antenna calibration in the silent time slot.
Fig. 6 is a schematic diagram of a calibration structure of a radio frequency channel of a base station system according to an embodiment of the present invention. Specifically, the process of the base station performing antenna calibration is shown in fig. 6.
Referring to fig. 6, an rf channel calibration structure of a base station system in an embodiment of the present invention includes a reference transmitting channel, an rf antenna splitter, and a receiving channel. During calibration, after a base station system obtains a receiving channel correction sequence, the receiving channel correction sequence is sent to a plurality of radio frequency antennas through the reference transmitting channel, the receiving channel of each radio frequency antenna calculates the amplitude phase deviation between the receiving channel and the reference transmitting channel according to the correction sequence to obtain a corresponding radio frequency correction coefficient, and the receiving channel is calibrated according to the radio frequency correction coefficient.
According to the antenna calibration method provided by the embodiment of the invention, the base station determines the position and the duration of the silent time slot, the base station and the terminal do not transmit and receive signals in the silent time slot, and the base station performs antenna calibration in the silent time slot, so that the calibration sequence in a receiving channel is prevented from being interfered by external signals in the antenna calibration process of the base station, and the accuracy of antenna calibration is ensured.
Fig. 7 is a schematic structural diagram of an antenna calibration apparatus according to an embodiment of the present invention.
Referring to fig. 7, an antenna calibration apparatus according to an embodiment of the present invention includes:
a determining module 710, configured to determine a position and a duration of a silence timeslot, where neither the antenna calibration apparatus nor the terminal in the silence timeslot can transmit and receive signals;
a calibration module 720, configured to perform antenna calibration in the silent time slot.
Optionally, the determining module 710 is specifically configured to:
acquiring an antenna calibration requirement parameter;
and determining the position and the duration of the silent time slot according to the antenna calibration requirement parameters.
Optionally, the apparatus further comprises:
a sending module 730, configured to send, after the determining module determines the position and duration of the silence timeslot, indication information to the terminal, where the indication information includes: the location and duration of the silent slot.
Optionally, the sending module 730 is specifically configured to:
and the base station sends the indication information to the terminal at a preset time length position before the starting time of the silent time slot.
Optionally, the determining module 710 is further configured to:
determining an occurrence period of the silent slots.
Optionally, the duration of the silence timeslot is greater than the duration of a preset guard interval GP.
The antenna calibration device provided in the embodiment of the present invention is configured to execute the antenna calibration method provided in the above method embodiment, and the specific implementation manner and technical effects thereof are similar to those of the method embodiment, and are not described herein again.
Fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Referring to fig. 8, a base station according to an embodiment of the present invention includes:
a processor 810, configured to determine a position and a duration of a silence timeslot, where neither the antenna calibration apparatus nor a terminal in the silence timeslot can transmit and receive signals;
the processor 810 is further configured to perform antenna calibration during the silent time slot.
Optionally, the processor 810 is specifically configured to:
acquiring an antenna calibration requirement parameter;
and determining the position and the duration of the silent time slot according to the antenna calibration requirement parameters.
Optionally, the base station further includes:
a transmitter 820, configured to transmit indication information to the terminal after the processor 810 determines the position and duration of the silence slot, where the indication information includes: the location and duration of the silent slot.
Optionally, the transmitter 820 is specifically configured to:
and sending the indication information to the terminal at a preset time length position before the starting time of the silent time slot.
Optionally, the processor 810 is further configured to:
determining an occurrence period of the silent slots.
Optionally, the duration of the silence timeslot is greater than the duration of a preset guard interval GP.
The base station provided in the embodiment of the present invention is configured to execute the antenna calibration method provided in the foregoing method embodiment, and a specific implementation manner and technical effects of the base station are similar to those of the method embodiment, and are not described herein again.
Fig. 9 is another schematic structural diagram of a base station according to an embodiment of the present invention.
Referring to fig. 9, a base station according to an embodiment of the present invention includes:
a processor 910 and a memory 920, where the memory 920 stores program instructions, and the processor 910 is configured to call the program instructions in the memory to implement the antenna calibration method provided in the foregoing method embodiment, and specific implementation and technical effects of the method are similar to those of the method embodiment, and are not described herein again.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Claims (15)
1. An antenna calibration method, comprising:
a base station determines the position and the duration of a silent time slot, wherein the base station and a terminal in the silent time slot do not transmit and receive signals;
and the base station carries out antenna calibration in the silent time slot, wherein the duration of the silent time slot is greater than the duration of a preset guard interval GP.
2. The method of claim 1, wherein the base station determines the position and duration of the silence slot, comprising:
the base station acquires antenna calibration requirements;
and the base station determines the position and the duration of the silent time slot according to the antenna calibration requirement.
3. The method of claim 1 or 2, wherein after the base station determines the position and duration of the silence slot, the method further comprises:
the base station sends indication information to the terminal, wherein the indication information comprises: the location and duration of the silent slot.
4. The method of claim 3, wherein the base station sends indication information to the terminal, and wherein the indication information comprises:
and the base station sends the indication information to the terminal at a preset time length position before the starting time of the silent time slot.
5. The method of claim 1, further comprising:
the base station determines an occurrence period of the silent slot.
6. An antenna calibration device, comprising:
a determining module, configured to determine a position and a duration of a silent timeslot, where neither the antenna calibration apparatus nor the terminal in the silent timeslot can transmit and receive signals;
and the calibration module is used for performing antenna calibration in the silent time slot, wherein the duration of the silent time slot is greater than the duration of a preset guard interval GP.
7. The apparatus of claim 6, wherein the determining module is specifically configured to:
acquiring an antenna calibration requirement parameter;
and determining the position and the duration of the silent time slot according to the antenna calibration requirement parameters.
8. The apparatus of claim 7, further comprising:
a sending module, configured to send, after the determining module determines the position and duration of the silence timeslot, indication information to the terminal, where the indication information includes: the location and duration of the silent slot.
9. The apparatus of claim 8, wherein the sending module is specifically configured to:
and sending the indication information to the terminal at a preset time length position before the starting time of the silent time slot.
10. The apparatus of claim 6, wherein the determining module is further configured to:
determining an occurrence period of the silent slots.
11. A base station, comprising:
a processor, configured to determine a position and a duration of a silent timeslot, where neither the antenna calibration apparatus nor the terminal in the silent timeslot can transmit and receive signals;
the processor is further configured to perform antenna calibration in the silent time slot, where a duration of the silent time slot is greater than a duration of a preset guard interval GP.
12. The base station of claim 11, wherein the processor is specifically configured to:
acquiring an antenna calibration requirement parameter;
and determining the position and the duration of the silent time slot according to the antenna calibration requirement parameters.
13. The base station of claim 12, further comprising:
a transmitter, configured to send, after the processor determines the position and duration of the silence slot, indication information to the terminal, where the indication information includes: the location and duration of the silent slot.
14. The base station of claim 13, wherein the transmitter is specifically configured to:
and sending the indication information to the terminal at a preset time length position before the starting time of the silent time slot.
15. The base station of claim 11, wherein the processor is further configured to:
determining an occurrence period of the silent slots.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2016/112759 WO2018119792A1 (en) | 2016-12-28 | 2016-12-28 | Antenna calibration method, device, and base station |
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| Publication Number | Publication Date |
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| CN109479205A CN109479205A (en) | 2019-03-15 |
| CN109479205B true CN109479205B (en) | 2020-12-08 |
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| CN201680087752.3A Active CN109479205B (en) | 2016-12-28 | 2016-12-28 | Antenna calibration method, device and base station |
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| WO (1) | WO2018119792A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111711497B (en) * | 2020-06-11 | 2022-04-26 | 杭州海康威视数字技术股份有限公司 | Frequency offset calibration method and alarm system |
| CN114189291B (en) * | 2020-09-15 | 2023-12-05 | 北京佰才邦技术股份有限公司 | Antenna calibration method, remote radio unit and baseband processing unit |
| CN117998536A (en) * | 2022-11-03 | 2024-05-07 | 中兴通讯股份有限公司 | Information transmission method, base station, terminal and storage medium |
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| CN101141235A (en) * | 2006-09-08 | 2008-03-12 | 北京大学 | Interference canceling method for co-frequency co-time slot duplexing |
| CN101529734A (en) * | 2006-10-26 | 2009-09-09 | 高通股份有限公司 | Silence intervals in wireless communications |
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| CN103124199A (en) * | 2011-11-21 | 2013-05-29 | 华为技术有限公司 | Method, device and data frame for sensing spectrum |
| CN104811255A (en) * | 2015-04-23 | 2015-07-29 | 大唐移动通信设备有限公司 | Antenna calibration method and device |
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| JP4388303B2 (en) * | 2003-05-16 | 2009-12-24 | 日本無線株式会社 | Array antenna communication device |
| CN101064902B (en) * | 2006-04-25 | 2010-11-10 | 大唐移动通信设备有限公司 | Method for real-time calibrating intelligent antenna |
| IL206008A0 (en) * | 2010-05-27 | 2011-02-28 | Amir Meir Zilbershtain | Transmit receive interference cancellation |
| CN102324961B (en) * | 2011-05-24 | 2014-06-18 | 大唐移动通信设备有限公司 | Method and device for determining calibration position of receiving direction antenna |
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2016
- 2016-12-28 CN CN201680087752.3A patent/CN109479205B/en active Active
- 2016-12-28 WO PCT/CN2016/112759 patent/WO2018119792A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101141235A (en) * | 2006-09-08 | 2008-03-12 | 北京大学 | Interference canceling method for co-frequency co-time slot duplexing |
| CN101529734A (en) * | 2006-10-26 | 2009-09-09 | 高通股份有限公司 | Silence intervals in wireless communications |
| CN102244531A (en) * | 2010-05-14 | 2011-11-16 | 电信科学技术研究院 | Method and device for dynamically regulating antenna calibration position |
| CN103124199A (en) * | 2011-11-21 | 2013-05-29 | 华为技术有限公司 | Method, device and data frame for sensing spectrum |
| CN104811255A (en) * | 2015-04-23 | 2015-07-29 | 大唐移动通信设备有限公司 | Antenna calibration method and device |
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| CN109479205A (en) | 2019-03-15 |
| WO2018119792A1 (en) | 2018-07-05 |
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