CN114339846A

CN114339846A - Channel correction method, base station and storage medium

Info

Publication number: CN114339846A
Application number: CN202011066138.3A
Authority: CN
Inventors: 贾民丽; 江天明; 李新; 童辉
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2022-04-12

Abstract

The invention discloses a channel correction method, a base station and a storage medium, comprising the following steps: the base station determines that channel correction adjustment is needed; and the base station adjusts the symbol position and/or the frequency domain range of the channel correction and then carries out the channel correction. By adopting the method and the device, the RANK of the system can be ensured not to be reduced due to the channel correction failure, and the peak rate can not be greatly reduced; the channel correction success on the full bandwidth can be directly ensured, the rate loss is avoided, and the whole capacity loss is smaller than that of the existing scheme.

Description

Channel correction method, base station and storage medium

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a channel correction method, a base station, and a storage medium.

Background

In 3G, 4G, and 5G networks, in terms of physical implementation of a base station, an RF (Radio Frequency) end of each antenna needs two sets of circuits to respectively complete transmission and reception of signals. In an ideal model, amplitude-phase characteristics and time delays of a plurality of radio frequency channels are completely consistent, but actual devices (mainly analog devices) have inconsistency, and characteristic response of each radio frequency circuit also changes along with device difference, working frequency, time and changes of external environments (such as temperature, humidity and the like). These factors may cause differences in amplitude and phase characteristics and time delays between channels, which may cause problems of beam pointing deflection, coverage error, depth reduction, etc., and affect the beamforming effect in a cell.

In order to eliminate the influence of the deviation between the radio frequency receiving and transmitting channels on the channels and ensure the reciprocity of the RF channels, the base station needs to adopt a calibration (positive) technique of the radio frequency path (channel). The main purpose of the Radio frequency path calibration is to ensure consistency of amplitude, phase, time delay and the like of RF transmission channels of a plurality of RRUs (Radio Remote units).

At present, the principle of 5G channel correction is basically the same as that of 4G, and the basic idea is to determine the characteristic difference between different channels by sending known correction signals, changing the phase, amplitude, time delay and the like after passing through different channels, and determining the response of different channels to the same signal passing through simultaneously. The method mainly comprises the steps of calculating delay difference, phase difference and amplitude difference among channels on each frequency in a frequency band through a correction algorithm, and then compensating to achieve consistency of each channel.

The defects of the prior art are as follows: under the condition that the corrected time domain (symbol) position and the frequency domain position (full bandwidth) of the base station channel are fixed, the requirement of a network with higher requirement cannot be met.

Disclosure of Invention

The invention provides a channel correction method, a base station and a storage medium, which are used for providing a base station channel correction scheme capable of meeting higher requirements.

The invention provides the following technical scheme:

a method of channel correction, comprising:

the base station determines that channel correction adjustment is needed;

and the base station adjusts the symbol position and/or the frequency domain range of the channel correction and then carries out the channel correction.

In an implementation, adjusting the frequency domain range of the channel correction includes: and adjusting the corrected bandwidth range of the uplink channel and/or the downlink channel.

In implementation, the bandwidth size and the starting position of the channel are adjusted according to the condition that the frequency domain is interfered.

In the implementation, the symbol position for adjusting the channel correction is to adjust the symbol position for correcting the uplink channel and/or the downlink channel by adjusting the specific time slot ratio or adjusting the symbol position of the specific time slot in which the channel correction is located.

In practice, the base station that adjusts the symbol position and/or frequency domain range of the channel correction is either an offending base station or a victim base station.

In the implementation, adjusting the symbol position of the specific timeslot where the channel correction is located includes: the channel correction position is a backward shift N symbol positions in a specific subframe time slot, and N is a positive integer; or, the channel correction position is a symbol position in an uplink time slot after the specific subframe time slot.

In the implementation, one or the combination of the following processes is further included:

when the base station is an LTE and NR common mode base station, the NR module stops uplink scheduling when the LTE module carries out channel correction;

when the base station is an LTE and NR common mode base station, the LTE module stops uplink scheduling when the NR module carries out channel correction;

the base station informs the terminal that the terminal can not send the feedback PUCCH of downlink scheduling in the channel corrected by the channel;

the base station informs the terminal of the HARQ feedback interval between the PDCCH and the PUCCH;

and the base station adjusts and informs the SRS sending position of the terminal.

In implementation, the base station determines that channel correction adjustment is required when one or a combination of the following situations:

the base station detects that the interference intensity is greater than a preset threshold;

the base station determines that the times that the interference intensity is greater than the preset threshold are greater than the preset times;

and the base station determines that the channel correction failure times are greater than the preset times.

In the implementation, the base station determines whether channel correction adjustment is needed according to a preset period; or the like, or, alternatively,

the base station determines whether channel correction adjustment is needed or not after receiving the notification of the administrator; or the like, or, alternatively,

the base station determines whether channel correction adjustment is needed after receiving the notification of OAM and/or Mas network management; or the like, or, alternatively,

and the base station determines whether channel correction adjustment is needed or not after receiving the instruction notice of the local maintenance operation system of the base station.

In the implementation, the base station detects the interference strength by using the reference signal in the atmospheric waveguide scheme or the remote base station interference management scheme.

In an implementation, the method further comprises the following steps:

and when the base station determines that the channel correction is not needed, restoring the symbol position and/or the frequency domain range of the original channel correction, and then performing the channel correction.

In implementation, the base station determines that channel correction is not needed when one or a combination of the following situations:

the base station detects that the interference intensity is smaller than a preset threshold;

the base station determines that the frequency of the interference intensity smaller than a preset threshold is smaller than a preset frequency;

the base station determines that the times that the interference intensity is greater than a preset threshold are less than a preset time;

and the base station determines that the channel correction failure times are less than the preset times.

In the implementation, the base station determines that channel correction is not needed and determines according to a preset period; or the like, or, alternatively,

the base station determines that channel correction is not needed and determines after receiving the notification of an administrator; or the like, or, alternatively,

the base station determines that channel correction is not needed and determines after receiving notification of OAM and/or Mas network management; or the like, or, alternatively,

the base station determines that channel correction is not needed and determines after receiving the instruction notice of the local maintenance operating system of the base station.

In an implementation, the method further comprises the following steps:

a switch is provided to control whether to implement the channel correction method.

In implementation, the switch is switched according to the number of times of channel calibration failure in a preset statistical period.

A base station, comprising:

a processor for reading the program in the memory, performing the following processes:

determining that channel correction is required;

adjusting the symbol position and/or frequency domain range of the channel correction, and then carrying out the channel correction;

a transceiver for receiving and transmitting data under the control of the processor.

informing the terminal that the downlink scheduling feedback PUCCH cannot be sent in the channel corrected by the channel;

informing a terminal of an HARQ feedback interval between a PDCCH and a PUCCH;

and adjusting and informing the SRS transmission position of the terminal.

In implementation, the channel correction is determined to be needed when one or a combination of the following situations:

detecting that the interference intensity is greater than a preset threshold;

determining that the times that the interference intensity is greater than a preset threshold are greater than preset times;

and determining that the channel correction failure times are greater than the preset times.

In the implementation, the channel correction is determined according to a preset period; or the like, or, alternatively,

determining that channel correction is needed, wherein the channel correction is determined after receiving the notification of an administrator; or the like, or, alternatively,

determining that channel correction is needed, wherein the channel correction is determined after receiving notification of OAM and/or Mas network management; or the like, or, alternatively,

determining that channel correction is required is determined after receiving a notification of a local maintenance operating system instruction of the base station.

In the implementation, the interference strength is detected by using the reference signal in the atmospheric waveguide scheme or the remote base station interference management scheme.

In an implementation, the method further comprises the following steps:

and when the channel correction is not needed, restoring the symbol position and/or the frequency domain range of the original channel correction, and then performing the channel correction.

In implementation, it is determined that channel correction is not required when either one or a combination of the following situations:

detecting that the interference intensity is smaller than a preset threshold;

determining that the frequency of the interference intensity smaller than a preset threshold is smaller than a preset frequency;

determining that the frequency of the interference intensity larger than a preset threshold is smaller than a preset frequency;

and determining that the channel correction failure times are less than the preset times.

In the implementation, the channel correction is determined not to be needed, and the channel correction is determined according to a preset period; or the like, or, alternatively,

determining that channel correction is not required, and determining after receiving an administrator notification; or the like, or, alternatively,

determining that channel correction is not needed, and determining after receiving notification of OAM and/or Mas network management; or the like, or, alternatively,

the determination that channel correction is not needed is made after receiving a notification of a local maintenance operating system command of the base station.

In an implementation, the method further comprises the following steps:

A base station, comprising:

the determining module is used for determining whether channel correction is needed or not;

and the correction module is used for adjusting the symbol position and/or the frequency domain range of the channel correction after determining that the channel correction is needed, and then performing the channel correction.

In an implementation, the correction module, when further used for adjusting the frequency domain range of the channel correction, includes: and adjusting the corrected bandwidth range of the uplink channel and/or the downlink channel.

In an implementation, the correction module is further configured to determine a bandwidth size and a starting position of the adjustment channel according to the degree of interference in the frequency domain.

In an implementation, the correction module is further configured to adjust the symbol position of the channel correction by adjusting a specific timeslot ratio or adjusting the symbol position of the specific timeslot where the channel correction is located to adjust the symbol position of the channel correction, so as to adjust the symbol position of the uplink channel and/or the downlink channel correction.

In an implementation, the correction module is further configured to, when adjusting the symbol position of the specific timeslot where the channel correction is located, include: the channel correction position is a backward shift N symbol positions in a specific subframe time slot, and N is a positive integer; or, the channel correction position is a symbol position in an uplink time slot after the specific subframe time slot.

In an implementation, the correction module is further configured to perform one or a combination of the following processes:

informing a terminal of an HARQ feedback interval between a PDCCH and a PUCCH;

and adjusting and informing the SRS transmission position of the terminal.

In an implementation, the determining module is further configured to determine that channel correction is required when one or a combination of the following situations:

detecting that the interference intensity is greater than a preset threshold;

In implementation, the determining module is further configured to determine that channel correction is required according to a preset period; or the like, or, alternatively,

determining that channel correction is needed after receiving the notification of the administrator; or the like, or, alternatively,

determining that channel correction is needed after receiving an OAM and/or Mas network management notification; or the like, or, alternatively,

and determining that channel correction is needed after receiving the instruction notice of the local maintenance operating system of the base station.

In an implementation, the determining module is further configured to detect the detected interference strength by using a reference signal in an atmospheric waveguide scheme or a remote base station interference management scheme.

In implementation, the correction module is further configured to perform channel correction after recovering the symbol position and/or the frequency domain range of the original channel correction when it is determined that the channel correction is not required.

In an implementation, the determining module is further configured to determine that channel correction is not required when one or a combination of the following situations:

detecting that the interference intensity is smaller than a preset threshold;

In implementation, the determining module is further configured to determine that channel correction is not required according to a preset period; or the like, or, alternatively,

determining that channel correction is not required upon receiving an administrator notification; or the like, or, alternatively,

determining that channel correction is not needed after receiving an OAM and/or Mas network management notification; or the like, or, alternatively,

and determining that channel correction is not needed after receiving the instruction notice of the local maintenance operation system of the base station.

A computer-readable storage medium storing a computer program for executing the above-described channel correction method.

The invention has the following beneficial effects:

in the scheme provided by the embodiment of the invention, when the base station channel correction needs to be optimized, the base station avoids strong interference by adaptively changing the symbol position and the bandwidth range of the base station channel correction to correct the base station channel, so that compared with the scheme of reducing the RANK (random access number) in the full bandwidth, the scheme of adjusting the bandwidth can ensure that the system does not reduce the RANK due to the channel correction failure, the peak rate is not greatly reduced, the bandwidth of reducing the RANK is not completely abandoned, and the method can be used for some users; for the scheme of adjusting the symbol position, it can directly ensure that the channel correction succeeds on the full bandwidth, and avoid the rate loss, even if the offset to the UL slot will lose part of the uplink traffic, each channel correction time period is longer, for example, 30 minutes or 1 hour, and one channel correction only takes several hundred milliseconds, so the overall capacity loss is smaller than that of the existing scheme.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of a 5G timeslot allocation in an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating that the 2.6GHz frame structure requires LTE and NR alignment in an embodiment of the present invention;

FIG. 3 is a schematic diagram of interference in an embodiment of the present invention;

FIG. 4 is a schematic flow chart illustrating an implementation of a channel calibration method according to an embodiment of the present invention;

FIG. 5 is a flow chart illustrating the implementation of channel calibration and recovery according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of frequency domain interference and channel correction bandwidth change according to an embodiment of the present invention;

FIG. 7 is a diagram illustrating time-domain adaptive channel calibration without changing specific slot ratios according to an embodiment of the present invention;

FIG. 8 is a diagram illustrating the NR time domain adaptive channel correction without changing the specific slot ratio according to an embodiment of the present invention;

FIG. 9 is a diagram illustrating the NR time domain adaptive channel correction with a specific slot ratio changed according to an embodiment of the present invention;

fig. 10 is a schematic diagram of LTE time domain adaptive channel correction for changing a specific timeslot ratio in the embodiment of the present invention;

fig. 11 is a schematic diagram of a base station structure according to an embodiment of the present invention.

Detailed Description

The inventor notices in the process of invention that:

the position where the mainstream equipment manufacturer realizes the channel calibration of the base station is mainly a fixed position, i.e. on a fixed symbol of a specific time slot GP (Guard Period) position. For example, the number of subsymbols of the current 5G network specific Time Slot is DwPTS (Downlink Pilot Time Slot): GP: when UpPTS (Uplink Pilot Time slot) is 6:4:4, the position of channel correction is mainly on 7 and/or 8 symbols of an S slot or subframe, and fig. 1 is a 5G slot matching diagram, as shown in fig. 1, that is, on the 8 th and/or 9 th symbols. In addition, in the frequency domain, the current channel correction scheme is independent of bandwidth, and mainly performs full-bandwidth correction. For example, if the current bandwidth is configured to be 100MHz, the correction is performed on the full bandwidth at 100 MHz. In addition, because the 4G network channel correction failure rate is low, enough attention is not paid, only alarm or notification is carried out, optimization is not carried out, and passive processing is mainly carried out. If the channel correction fails, the main scheme of each manufacturer is passive processing at present, the channel correction itself is not optimized, and only low-order RANK (RANK) is adopted for scheduling, which causes the consequence that the network rate is continuously low. Another existing network is to change 100M to 60M directly for traffic transmission, with the result that the whole 40M cannot be used and the network rate does not reach the peak value of 5G.

In summary, the channel calibration (calibration) scheme of the base station is mainly fixed in position and performed in full bandwidth, and passive processing is mainly performed after the channel calibration fails, thereby reducing RANK scheduling. However, compared to 4G, the problem of a network with higher requirement, for example, 5G, may be more prominent, and the reason is as follows, taking 5G as an example:

1) the 4G main flow antenna is 8T, the vertical dimension width of the antenna is relatively small to 5G, and the interference is relatively small, while the 5G main flow antenna is 64T and the interference is relatively large;

2)4G has low beam forming dependence, the maximum RANK number is 2 streams, and the rate influence is relatively small after the RANK is reduced; and 5G has high beam forming dependency, the maximum RANK number is 4 streams, and if the RANK is reduced to RANK1, the rate influence is large.

3) At present, 4G and 5G coexist, the D1 occupied by the 4G network before, the D2 frequency band-40M is overlapped with the 5G network 40M, although the D1 and the D2 are used for 5G after frequency cleaning according to requirements, the frequency cleaning work of the D1 and the D2 needs a certain period, and partial stations may not be cleaned due to specific needs.

At present, in the 5G existing network, a case that the far-end interference causes the channel correction failure of the 5G cell is also found. Specifically, when a 5G cell test is performed, it is found that a super high station (about 40 m) has a part of cells, and due to frequency band interference of D1 and D2 and far-end interference, NR (New Radio) channel correction failure is caused, which results in a low downlink RANK and a low rate.

Further, take LTE (Long term evolution) specific subframe slot ratio of 10:2:2 and NR specific subframe slot ratio of 6:4:4 as an example. Fig. 2 is a schematic diagram of 2.6GHz frame structure requiring LTE and NR alignment, ideally requiring both alignment as shown in fig. 2.

In practice, however, the LTE and NR frame structures are staggered due to propagation delay effects. Fig. 3 is an interference diagram, as shown, illustrated as follows: if LTE is offset by 1-4 NR symbols, then NR symbols 6-9 are affected, but when

symbols

7 and 8 are affected, NR channel correction is affected. (one symbol propagation distance is 0.5ms 3 100000 km/14 10.7 km, so the base stations affecting the channel correction are 20-30 km and more apart).

It can be seen that, currently, in the period of incomplete clear frequency of D1 and D2, and under the condition of atmospheric waveguide which may exist in the future, and under the condition that the current time domain (symbol) position and the frequency domain position (full bandwidth) of factory base station channel correction are fixed, channel correction failure can occur at a high probability, and if the RANK processing is reduced according to the current passive processing, the 5G network rate cannot be reached; another is to directly reduce the bandwidth 100M to 60M, 40M is not available, the peak rate is directly affected, the user perception is seriously affected, and the commercial and popularization of the 5G network are affected, so a solution is needed to solve the problem of channel correction failure.

The following describes embodiments of the present invention with reference to the drawings.

Fig. 4 is a schematic flow chart of an implementation of the channel calibration method, as shown in the figure, the implementation may include:

step 401, the base station determines that channel correction adjustment is needed;

step 402, the base station adjusts the symbol position and/or frequency domain range of the channel correction, and then performs the channel correction.

In the implementation, the method can further comprise the following steps:

Specifically, for the problem of failure of the base station channel correction, when it is determined that the base station channel correction needs to be optimized, the base station may change the symbol position and/or the frequency domain range of the base station channel correction (calibration) in a self-adaptive manner to resist strong interference, or may further include a mechanism for recovering the original base station channel correction when the base station determines that the base station channel correction needs to be recovered.

Adaptation is a way of controlling that can modify its own characteristics to adapt to changes in the dynamic characteristics of the object and disturbance. The self-adaptive control method can realize the following steps: during operation, the current actual working state of the controlled object is determined by continuously acquiring control process information, the performance criterion is optimized, and a self-adaptive control rule is generated, so that the structure or parameters of the controller are adjusted in real time, and the controller always automatically works in the optimal or sub-optimal operating state.

When the base station judges that the base station channel correction needs to be recovered, recovering the original base station channel correction mechanism; the method comprises the following steps: and restoring the frequency domain bandwidth and the time domain position corrected by the base station channel before adjustment. The judged condition is an unrealistic condition for the base station to determine that channel correction is required. Namely:

in implementation, the base station determines that no channel correction adjustment is needed when one or a combination of the following situations:

Fig. 5 is a schematic flow chart of a channel calibration and recovery implementation, as shown, the implementation may include:

step 501, the base station judges that the channel correction of the base station needs to be optimized;

502, the base station resists strong interference by adaptively changing the position and the range of the channel correction (calibration) of the base station;

step 503, the base station judges that the base station channel correction needs to be recovered;

and step 504, recovering the original base station channel correction mechanism.

When the channel is adjusted, the channel can be adjusted up and down simultaneously or separately, that is, the channel correction adjustment is either an uplink adjustment or a downlink adjustment only, or the channel correction adjustment is performed simultaneously.

In specific implementation, the bandwidth size and the starting position of the channel are adjusted according to the condition that the frequency domain is interfered.

In particular, strong interference is resisted by adaptively changing the position and range of base station channel correction (calibration), including changing the bandwidth of channel correction through frequency domain adaptation. The bandwidth size may be preconfigured.

In the scheme, taking the bandwidth as an example, the bandwidth affected by the interference can be detected first, so that the bandwidth for channel correction is adaptively changed. For example, the interference scanning and detection may be performed in full bandwidth, and a bandwidth with stronger interference is selected to avoid performing channel correction, and in the selection, for convenience of implementation, a continuous bandwidth is preferably selected, for example, a bandwidth which is a multiple of 10 is selected and is a continuous bandwidth; or, the interference scanning and detection can be performed by a sliding window with a certain bandwidth length, and the channel correction is avoided by the bandwidth with stronger interference. For example, a bandwidth of 10M is used to scan a bandwidth of 100M, the interference situation of each bandwidth may be compared with an average value, if the interference situation exceeds a threshold of a preset value, the bandwidth is marked as an unavailable channel calibration bandwidth, and the others are bandwidth in which channel calibration can be performed, and the result may be referred to as the unavailable bandwidth.

The following is illustrated by way of example:

for example, it is detected that the interference intensity of the 40M bandwidth on the 5G 100M bandwidth is large, fig. 6 is a schematic diagram of frequency domain interference and a schematic diagram of channel correction bandwidth change, as shown in the figure, the base station determines that the channel correction of the base station needs to be optimized, and a specific determination method is described in the following determination method.

At this time, the base station optimizes the method for correcting the channel of the base station, changes the bandwidth for correcting the channel into the bandwidth with less interference, for example, 60M in fig. 6, performs channel correction only by 60M, and ensures the beamforming effect scheduled in 60M, and other bandwidths with serious interference are 40M, and first, channel correction can be performed by referring to the result of 60M channel correction as a reference, and/or the 40M still performs channel correction alone, reduces RANK processing, schedules users with low pair rate, or schedules users without using a beamforming mode, and adopts a PMI (precoding matrix information) mode or other modes.

Specifically, the position and range of the channel correction (calibration) of the base station can be adaptively changed to resist strong interference, including the symbol position of the channel correction is adaptively changed in the time domain, which includes two cases, that is, a fixed specific time slot ratio and a changed specific time slot ratio can be used.

In a specific implementation, the base station that adjusts the symbol position and/or frequency domain range of the channel correction is an interfering base station or a victim base station.

In particular, the strong interference can be resisted by adaptively changing the position and range of the channel correction (calibration) of the base station, including the symbol position of the channel correction by adaptively changing the time domain, wherein the strong interference can be implemented by an interfering station or a victim station.

Wherein, 4G has influenced 5G, then 4G base station is for disturbing the station, and 5G base station is for the disturbed station, otherwise, 5G has influenced 4G, and 5G base station is for disturbing the station, and 4G base station is for the disturbed station.

Specifically, the symbol position of channel correction may be changed by time domain adaptation, including position backward shift in a specific subframe slot, where the time domain position or time domain distance of backward shift may be configured, and the specific configuration distance includes 0, and may further include a negative number and a positive number, and may further include position backward shift in an uplink slot after the specific subframe slot, where the time domain position or time domain distance of backward shift may be configured in advance.

In the implementation, the channel correction position can be self-adapted after the channel correction failure reaches the pre-configured times within a certain statistical period, including modifying the symbol position of the channel correction to be the last 2 symbols of the GP. If the channel correction failure times reach the threshold configured in advance after adjustment, the channel correction position is self-adapted to the uplink time slot.

When 4G affects 5G, the base station of 4G is the interfering station, and the base station of 5G is the interfered station. The adaptation may be done only for 5G base stations: the method only modifies the symbol position of channel correction without changing the ratio of a specific time slot, and then moves to the last symbol of GP or moves to an uplink time slot for channel correction; or changing the ratio of the 5G specific time slots, increasing the number of symbols of GP, and simultaneously moving the position of the channel correction symbol backwards to avoid the influence of interference; and 4G base stations can be lost for self-adaptation, the specific time slot ratio of 4G is changed, and the interference to 5G is reduced. Correspondingly, if 5G affects 4G, the base station of 5G is an interfering station, and the base station of 4G is a victim station. In this case, the base station of 4G may also perform adaptation, and the specific method is the same as 5G.

The following example illustrates the case where 4G affects 5G.

The 5G base station is self-adaptive, and the specific time slot ratio is not changed. The symbols for channel correction are shifted backwards, either within the GP or to the UL slot position.

Fig. 7 is a schematic diagram of time domain adaptive channel correction without changing a specific timeslot ratio, as shown in fig. 7, here, taking LTE (Long term evolution) specific timeslot ratio as 10:2:2 as an example, and NR specific timeslot ratio as 6:4:4, in this scheme, the ratio is not changed. Assuming that the propagation delay is 2 NR symbols, the LTE symbol 9 affects the

NR GP symbols

6, 7, and 7, 8 are the current channel correction positions. The position shifted backward at this time may be set to 1 NR symbol, i.e., the channel correction position becomes

symbols

8 and 9.

Fig. 8 is a schematic diagram of NR time-domain adaptive channel correction without changing specific timeslot ratios, as shown in fig. 8, where an LTE specific timeslot ratio is 10:2:2, and an NR specific timeslot ratio is 6:4:4, in this scheme, the ratio is not changed. Assuming a propagation delay of 4 NR symbols, the

symbols

8 and 9 of LTE will affect the

symbols

6, 7, 8, 9 of NR, and 7, 8 are the positions of the current channel correction. The position shifted backward at this time may be set to 7 NR symbols, i.e.,

symbols

0 and 1 at which the channel correction position becomes UL slot. Alternatively, the position shifted backward at this time may be set to 18 NR symbols, i.e.,

symbols

12 and 13 where the channel correction position becomes UL slot.

The 5G base station is self-adaptive, and the specific time slot ratio is changed. The GP in the specific slot allocation of NR can be configured arbitrarily, so the length of GP and the position of channel correction can be configured according to the requirement.

Fig. 9 is a schematic diagram of NR time-domain adaptive channel correction for changing a specific timeslot ratio, as shown in fig. 9, where an LTE specific timeslot ratio is 10:2:2, and an NR specific timeslot ratio is 6:4:4, in this scheme, the ratio is changed. Assuming a propagation delay of 2 NR symbols, the symbol 9 of LTE affects the

symbols

6, 7 of NR, and 7, 8 are the positions of the current channel corrections. The specific slot allocation of NR is now reconfigured, e.g. to 6:6:2, and the position of the back shift can be set to 2 NR symbols, i.e. the channel correction positions become

symbols

10 and 11.

Fig. 10 is a schematic diagram of LTE time domain adaptive channel correction by changing specific timeslot ratios, where 4G base stations adapt, change the configuration of GP, for example, 10:2:2, to 3:9:2, and the position of channel correction is not changed. This also reduces interference with 5G. As shown in particular in fig. 10.

In the implementation, one or a combination of the following processes can be further included:

Specifically, the method may further include that the base station needs to adjust an internal scheduling algorithm, for example, LTE and NR common mode base stations, but when an LTE channel is corrected, NR stops uplink scheduling; when the NR channel is corrected, the LTE stops uplink scheduling; informing the terminal that the feedback PUCCH of downlink scheduling cannot be sent in the channel correction; informing a terminal of an HARQ feedback interval between a PDCCH and a PUCCH; and adjusting and notifying the transmission position of the SRS.

In the concrete implementation of the method, the device comprises a base,

the base station determines whether channel correction adjustment is needed according to a preset period; or the like, or, alternatively,

Specifically, when the base station determines that the base station channel correction needs to be optimized, the base station may determine in the following manner:

when the interference intensity detected by the base station is greater than and/or greater than or equal to a certain threshold which can be configured in advance; or when the base station judges that the interference intensity is greater than and/or greater than or equal to a certain pre-configurable threshold and/or greater than or equal to a certain pre-configurable number of times; or when the number of times of failed base station channel correction is greater than and/or greater than or equal to a certain pre-configurable number of times, the base station judges that the base station channel correction needs to be optimized.

The above judgment can also be made within a certain time period (the period is configurable), and/or external notification, including artificial notification, or OAM (operation, Administration and Maintenance, Operations, Administration and Maintenance) and Mas (Mobile Agent Server) network management notification or base station local Maintenance operating system instruction notification, at this time, the base station judges that the base station channel correction needs to be optimized.

Specifically, the channel correction position is supported to achieve threshold setting according to the failure times of channel correction which can be configured in advance in a certain statistical period, and the self-adaptation of the channel correction position is carried out, wherein the symbol position of the channel correction is modified to be the last 2 symbols of GP. If the channel correction is adjusted, the failure times which can be configured in advance of the channel correction reach a threshold, and the channel correction position is self-adaptive to the uplink time slot.

The following is an example.

When the base station detects that the interference intensity on the channel correction symbol is greater than and/or equal to-100 dBm which can be configured in advance and (or not) 30 times. In the specific implementation, the detection time can be configured, such as the subframe level; and/or the presence of a gas in the gas,

the number of times of failure of channel correction of the base station is greater than and/or greater than or equal to 30 times which can be configured in advance; and/or the presence of a gas in the gas,

OAM makes and informs the base station to need to optimize the base station to correct, etc.;

then the base station determines that the base station channel correction needs to be optimized.

Specifically, the base station detects the interference strength, and can locate the interference and detect the relevant interference strength and position by using the reference signal in the atmospheric waveguide or the interference management scheme of the remote base station, or locate the base station ID of the interfering station, and the like.

In implementation, the method may further include:

In a specific implementation, the switch is switched on and off according to the number of times of channel correction failure in a preset statistical period.

Specifically, the channel correction position is supported to achieve threshold setting according to the channel correction failure times (configurable) in a certain statistical period, and the channel correction position self-adaptation is carried out, wherein the channel correction position is modified to be the last 2 symbols of GP. If the channel correction failure times (configurable) reach the threshold after adjustment, the channel correction position is self-adapted to the uplink time slot.

For example, a configuration supporting channel correction position adaptive switches is configured. The switch is turned on, the function is turned on, the switch is turned off, and the function is not turned on.

In practical operation, the following temporary schemes can be considered to alleviate the problem that the base station calibration fails due to far-end interference, for example, the mechanical tilt angle of the 5G base station antenna is pressed down, so that the high-altitude signal sent by the interference source station is weakened; the interference signal received by the interfered station can be weakened; interference will be reduced; for example, the influence is reduced by clearing frequency D1 and D2, for example, at least for clearing frequency in the range of 20-30 kilometers, the interference can be effectively reduced.

As can be seen from the foregoing embodiments, the technical solutions provided by the embodiments of the present invention at least include the following contents:

(1) channel correction position adaptation

Channel correction position adaptive switch configuration is supported.

Priority: first priority

(2) Channel correction position adaptation

And supporting the channel correction position to perform self-adaptation of the channel correction position according to the fact that the channel correction failure times (configurable) in a certain statistical period reach the threshold setting, wherein the channel correction failure times comprise the step of modifying the sign position of the channel correction to be the last 2 signs of GP. If the channel correction failure times (configurable) reach the threshold after adjustment, the channel correction position is self-adapted to the uplink time slot.

Priority: first priority

(3) Channel correction position adaptation

The channel correction position adaptation can be carried out separately in uplink and downlink.

Priority: first priority

Based on the same inventive concept, the embodiment of the present invention further provides a base station and a computer-readable storage medium, and since the principle of solving the problem of these devices is similar to the channel correction method, the implementation of these devices may refer to the implementation of the method, and repeated details are not repeated.

When the technical scheme provided by the embodiment of the invention is implemented, the implementation can be carried out as follows.

Fig. 11 is a schematic structural diagram of a base station, as shown in the figure, the base station includes:

the processor 1100, which reads the program in the memory 1120, performs the following processes:

determining that channel correction adjustment is needed;

a transceiver 1110 for receiving and transmitting data under the control of the processor 1100.

informing a terminal of an HARQ feedback interval between a PDCCH and a PUCCH;

and adjusting and informing the SRS transmission position of the terminal.

In implementation, the channel correction adjustment is determined to be needed when one or a combination of the following situations:

detecting that the interference intensity is greater than a preset threshold;

In the implementation, whether channel correction adjustment is needed or not is determined according to a preset period; or the like, or, alternatively,

determining whether channel correction adjustment is needed after receiving the notification of the administrator; or the like, or, alternatively,

determining whether channel correction adjustment is needed or not after receiving an OAM and/or Mas network management notification; or the like, or, alternatively,

and determining whether channel correction adjustment is needed or not after receiving the instruction notice of the local maintenance operating system of the base station.

In an implementation, the method further comprises the following steps:

and when the channel correction adjustment is not needed, restoring the symbol position and/or the frequency domain range of the original channel correction, and then performing the channel correction.

In implementation, it is determined that no channel correction adjustment is required when either one or a combination of the following:

detecting that the interference intensity is smaller than a preset threshold;

In an implementation, the method further comprises the following steps:

Where in fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1100, and various circuits, represented by memory 1120, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1110 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 in performing operations.

The embodiment of the invention also provides a base station, which comprises:

the determining module is used for determining whether channel correction adjustment is needed or not;

and the correction module is used for adjusting the symbol position and/or the frequency domain range of the channel correction after determining that the channel correction adjustment is needed, and then performing the channel correction.

informing a terminal of an HARQ feedback interval between a PDCCH and a PUCCH;

and adjusting and informing the SRS transmission position of the terminal.

In an implementation, the determining module is further configured to determine that a channel correction adjustment is required when one or a combination of the following situations:

detecting that the interference intensity is greater than a preset threshold;

In implementation, the determining module is further configured to determine whether channel correction adjustment is required according to a preset period; or, after receiving the notification of the administrator, determining whether channel correction adjustment is needed; or, after receiving the notification of OAM and/or Mas network management, determining whether channel correction adjustment is needed; or, after receiving the instruction notice of the local maintenance operation system of the base station, determining whether the channel correction adjustment is needed.

In implementation, the correction module is further configured to perform channel correction after recovering the symbol position and/or the frequency domain range of the original channel correction when it is determined that channel correction adjustment is not required.

In an implementation, the determining module is further configured to determine that no channel correction adjustment is required when one or a combination of the following situations:

detecting that the interference intensity is smaller than a preset threshold;

In implementation, the determining module is further configured to determine whether channel correction adjustment is required according to a preset period; or the like, or, alternatively,

For convenience of description, each part of the above-described apparatus is separately described as being functionally divided into various modules or units. Of course, the functionality of the various modules or units may be implemented in the same one or more pieces of software or hardware in practicing the invention.

The embodiment of the invention also provides a computer readable storage medium, and the computer readable storage medium stores a computer program for executing the channel correction method.

Specific implementations can be found in the implementation of the channel correction method.

In summary, in the solution provided in the embodiment of the present invention, for the problem of failure of the base station channel correction, when it is determined that the base station channel correction needs to be optimized, the base station resists strong interference by adaptively changing the position and range of the base station channel correction (calibration), and can also recover the mechanism of the original base station channel correction when the base station determines that the base station channel correction needs to be recovered.

Current solutions include: 1) full bandwidth (100M) reduction RANK processing; 2) from 100M directly to 60M. When the calibration of the base station channel fails, compared with the two schemes, the scheme has at least one of the following effects:

the bandwidth size of the channel correction is adaptively changed as shown in the example of fig. 6. This scheme is relatively 1) can guarantee that 60M of bandwidth does not undergo RANK reduction, which 60M can reach the peak, whereas the existing scheme reduces directly from RANK4 to RANK1, resulting in a peak rate reduction of one quarter of the 100M peak rate. The scheme is relative to 2) the scheme not only reserves 60M bandwidth, but also does not completely abandon 40M bandwidth, and can serve some users by referring to a 60M channel correction result;

the scheme for adaptively changing the channel correction time domain position, such as fig. 7, 8, 9, and 10, can directly ensure that the channel correction succeeds on the bandwidth of 100M, and avoid the rate loss. Even if a partial upstream traffic is lost when shifting to the UL slot, the time period for each channel correction is long, for example, 30 minutes or 1 hour, and one channel correction takes only several hundred milliseconds, so the overall capacity loss is smaller than that of the existing schemes 1) and 2).

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method of channel correction, comprising:

the base station determines that channel correction adjustment is needed;

2. The method of claim 1, wherein adjusting the frequency domain range of the channel correction comprises: and adjusting the corrected bandwidth range of the uplink channel and/or the downlink channel.

3. The method of claim 2, wherein the bandwidth size and the starting position of the channel are adjusted according to the frequency domain interfered condition.

4. The method of claim 1, wherein the adjusting the symbol position of the channel correction is performed by adjusting the symbol position of the uplink channel and/or the downlink channel correction by adjusting the specific slot ratio or adjusting the symbol position of the specific slot in which the channel correction is located.

5. A method according to claim 1, characterized in that the base station adjusting the symbol position and/or the frequency domain range of the channel correction is either an offending base station or a victim base station.

6. The method of claim 4 or 5, wherein adjusting the symbol position of the particular slot in which the channel correction is located comprises: the channel correction position is a backward shift N symbol positions in a specific subframe time slot, and N is a positive integer; or, the channel correction position is a symbol position in an uplink time slot after the specific subframe time slot.

7. The method of claim 4, 5 or 6, further comprising one or a combination of the following:

8. The method of claim 1, wherein the base station determines that a channel correction adjustment is needed when one or a combination of the following situations:

9. The method of claim 8, wherein the base station determines whether channel correction adjustment is required according to a preset period; or the like, or, alternatively,

10. The method of claim 8, wherein the base station detects the interference strength by using a reference signal in an air waveguide scheme or a remote base station interference management scheme.

11. The method of claim 1, further comprising:

and when the base station determines that the channel correction adjustment is not needed, the base station restores the symbol position and/or the frequency domain range of the original channel correction and then performs the channel correction.

12. The method of claim 11, wherein the base station determines that no channel correction adjustment is needed when one or a combination of the following:

13. The method of claim 1, further comprising:

a switch is provided to control whether to perform channel correction.

14. The method of claim 13, wherein the switching is performed according to a number of channel calibration failures within a preset statistical period.

15. A base station, comprising:

determining that channel correction adjustment is needed;

16. A base station, comprising:

17. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any one of claims 1 to 14.