CN111436063A - Network side equipment and method for carrying out remote interference suppression - Google Patents

Network side equipment and method for carrying out remote interference suppression Download PDF

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Publication number
CN111436063A
CN111436063A CN201910028231.6A CN201910028231A CN111436063A CN 111436063 A CN111436063 A CN 111436063A CN 201910028231 A CN201910028231 A CN 201910028231A CN 111436063 A CN111436063 A CN 111436063A
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power
reference signal
remote interference
value
signal
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CN111436063B (en
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吕叶青
刘宏举
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Hisense Co Ltd
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Hisense Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • 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

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  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a network side device and a method for remote interference suppression thereof, which relate to the technical field of wireless communication and are used for solving the problem that how to efficiently suppress the interference of an interfering party to an interfered party when remote interference exists between wireless signals transmitted by the network side device in the prior art, wherein the method comprises the following steps: when monitoring that a reference signal RS1 sent by an interfered party is received, network side equipment determines that remote interference is generated on the interfered party, determines a downlink symbol position generating the remote interference according to the time position of receiving a reference signal RS1, and reduces the signal transmission power at the downlink symbol position to a preset power threshold value. The invention can quickly restrain remote interference and avoid complicated signaling interaction.

Description

Network side equipment and method for carrying out remote interference suppression
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a network side device and a method for performing remote interference suppression.
Background
In Time Division long Term Evolution TD-L TE (Time Division L ong Term Evolution), due to the atmospheric waveguide phenomenon, the Radio signal of a synchronous remote eNB (4G base station) with the same Time Division duplexing TDD (Time Division duplexing) configuration can cause non-negligible interference to a local eNB, i.e. remote interference, although there are many differences between next generation wireless 5G NR (New Radio) and TD-L TE, most deployments of NR are in TDD mode, and thus NR still faces the problem of remote interference.
Disclosure of Invention
The invention provides a network side device and a method for remote interference suppression thereof, which are used for solving the problem in the prior art that how to effectively suppress the remote interference of an interfering party to an interfered party when the remote interference exists between wireless signals transmitted by the network side device.
In a first aspect, the present invention provides a method for performing remote interference suppression by a network side device, where the method includes:
when monitoring and receiving a reference signal RS1 sent by an interfered party, network side equipment determines that remote interference is generated on the interfered party;
determining the position of a downlink symbol generating remote interference according to the time position of the received reference signal RS 1;
and reducing the signal transmitting power at the position of the downlink symbol to a preset power threshold value.
In the method, when the network side equipment detects that the remote interference is generated, the signal transmitting power at the position of the downlink symbol generating the remote interference is directly reduced to the preset power threshold value, so that the interference can be quickly and efficiently inhibited, and complicated signaling interaction between the network side equipment and an interfered party is avoided.
In an optional implementation manner, after reducing the signal transmission power at the downlink symbol position to a preset power threshold, the method further includes:
monitoring whether a reference signal RS1 sent by the interfered party is received again;
if the reference signal RS1 sent by the interfered party is not received again, the signal transmitting power is increased according to a preset power adjusting method;
and if the reference signal RS1 sent by the interfered party is received again, discarding the downlink symbol at the downlink symbol position according to the time position of the reference signal RS1 received again.
In the method, after the network side equipment performs remote interference suppression by adopting a scheme of reducing the transmitting power for the first time, whether remote interference disappears is judged according to whether the reference signal RS1 sent by the interfered party is received again, and if the remote interference does not disappear, the downlink symbol generating the remote interference at present is directly discarded, so that the remote interference is thoroughly solved; if the remote interference disappears, under the condition that the remote interference is not generated again, the signal transmitting power is increased to improve the intensity of the transmitted wireless signal, so that the user service quality of the interference party cell is further ensured, and better balance is obtained between the situation that the remote interference is generated to the interfered party and the situation that the user service of the interference party cell is ensured. In an optional implementation manner, increasing the signal transmission power according to a preset power adjustment method includes:
determining a power adjustment interval for increasing the signal transmission power initially;
converging the power adjustment interval;
and taking the intermediate power value of the power adjustment interval at the end of convergence as the signal transmitting power.
In an optional implementation manner, converging the power adjustment interval includes:
monitoring whether the reference signal RS1 is received again by using the intermediate power value of the current power adjustment interval as the signal transmitting power;
if the reference signal RS1 is received again, updating the maximum value of the power adjustment interval to the intermediate power value for convergence again;
if the reference signal RS1 is not received again, convergence is finished when the difference value of the signal transmitting powers used for the last two times is smaller than the threshold value, otherwise, the minimum value of the power adjusting interval is updated to the intermediate power value for convergence again.
In the method, the convergence mechanism of the dichotomy is adopted to improve the signal transmitting power, and the service quality of users in the cell of the interference party is ensured to a greater extent under the condition of ensuring that the remote interference is inhibited. And the convergence speed is high and the convergence precision is high by adopting a bisection convergence mechanism, compared with other convergence mechanisms, the signal transmission power can be converged to a proper value more quickly, the user service quality of an interference party cell can be improved, and the generation of new remote interference on an interfered party is avoided.
In an alternative implementation, the preset power threshold is determined by:
and determining the preset power threshold according to the minimum transmitting power meeting the QoS (quality of service) requirement of the cell user.
In the method, the preset power threshold is determined according to the minimum transmitting power required by the QoS of the cell user, so that the service quality of the cell user for signal transmission is ensured.
In the method, the preset power threshold is set according to the user service quality requirement of the interference cell, and when the signal transmission power is reduced to the preset power threshold for remote interference suppression, the user service quality of the interference cell is ensured.
In an alternative implementation, the preset power threshold is determined by:
determining a power fluctuation range corresponding to signal transmission power which does not generate remote interference on an interfered party in a previous period of time;
and determining one half of the sum of the maximum power value and the minimum power value in the power fluctuation range as the preset power threshold.
In the method, the middle value of the power fluctuation range which does not generate remote interference on the interfered party within a period of time is selected as the preset power threshold, and when the signal transmission power is reduced to the preset power threshold for remote interference suppression, the possibility of generating remote interference again is reduced when the signal is transmitted by using the preset power threshold. In a second aspect, the present invention provides a network side device for performing remote interference suppression, including: the processor is used for reading the program in the memory and executing the following steps:
monitoring and receiving a reference signal RS1 sent by an interfered party, and determining that remote interference is generated on the interfered party;
determining the position of a downlink symbol generating remote interference according to the time position of the received reference signal RS 1;
and reducing the signal transmitting power at the position of the downlink symbol to a preset power threshold value.
In a possible implementation manner, the processor is further configured to monitor whether a reference signal RS1 sent by an interfered party is received again after the signal transmission power at the downlink symbol position is reduced to a preset power threshold;
if the reference signal RS1 sent by the interfered party is not received again, the signal transmitting power is increased according to a preset power adjusting method;
and if the reference signal RS1 sent by the interfered party is received again, discarding the downlink symbol at the position of the downlink symbol according to the time position of the reference signal RS1 received again.
In a possible implementation manner, the processor is specifically configured to determine a power adjustment interval for increasing the signal transmission power initially;
converging the power adjustment interval;
and taking the intermediate power value of the power adjustment interval at the end of convergence as the signal transmitting power.
In a possible implementation manner, the processor is specifically configured to monitor whether the reference signal RS1 is received again, using the intermediate power value of the current power adjustment interval as the signal transmission power;
if the reference signal RS1 is received again, updating the maximum value of the power adjustment interval to the intermediate power value for convergence again;
if the reference signal RS1 is not received again, convergence is finished when the difference value of the signal transmitting powers used for the last two times is smaller than the threshold value, otherwise, the minimum value of the power adjusting interval is updated to the intermediate power value for convergence again.
In one possible implementation, the processor is configured to determine the preset power threshold by:
and determining the preset power threshold according to the minimum transmitting power meeting the QoS (quality of service) requirement of the cell user.
In one possible implementation, the processor is configured to determine the preset power threshold by:
determining a power fluctuation range corresponding to signal transmission power which does not generate remote interference on an interfered party in a previous period of time;
and determining one half of the sum of the maximum power value and the minimum power value in the power fluctuation range as the preset power threshold value.
In a third aspect, the present invention also provides a computer storage medium having stored thereon a computer program which, when executed by a processing unit, performs the steps of the method of the first aspect.
In addition, for technical effects brought by any one implementation manner of the second aspect and the third aspect, reference may be made to technical effects brought by different implementation manners of the first aspect, and details are not described here.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic illustration of atmospheric wave guides of electromagnetic waves causing remote interference;
fig. 2 is a schematic diagram of downlink signals of an interfering party propagating for a long distance and interfering with uplink signals of an interfered party under different distance conditions;
fig. 3 is a schematic diagram of an interfering party causing IoT in the time domain to "tilt";
fig. 4 is a schematic diagram illustrating a scenario in which remote interference between an interfering party and an interfered party is symmetric interference;
fig. 5 is a schematic diagram illustrating a scenario in which remote interference between an interfering party and an interfered party is asymmetric interference;
fig. 6 is a flowchart of a method for performing remote interference suppression by a network side device according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating an interaction between a network-side device and an interfered party when performing remote interference mitigation according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a specific process for increasing the signal transmission power according to an embodiment of the present invention;
fig. 9 is a schematic view of a complete flow chart of a method for performing remote interference suppression by a network side device according to an embodiment of the present invention;
fig. 10 is a structural diagram of a network side device for performing remote interference suppression according to an embodiment of the present invention;
fig. 11 is a structural diagram of another network-side device for performing remote interference suppression according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Some of the words that appear in the text are explained below:
1. the term "interferer" in the embodiment of the present invention refers to a network side device that generates interference to a wireless signal transmitted by another network side device during a wireless signal transmission process;
2. in the embodiment of the present invention, the term "interfered party" refers to a network side device, where a wireless signal sent out is interfered by a wireless signal sent by another network side device in a wireless signal sending process;
3. the term "network side device" in the embodiment of the present invention refers to a device that can transmit wireless signals, such as a 4G base station, a 5G base station, and the like.
The application scenario described in the embodiment of the present invention is for more clearly illustrating the technical solution of the embodiment of the present invention, and does not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by a person skilled in the art that with the occurrence of a new application scenario, the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems. In the description of the present invention, the term "plurality" means two or more unless otherwise specified.
During the transmission of wireless electromagnetic waves, under certain weather conditions, electromagnetic waves propagating in the atmosphere, particularly in the troposphere, are affected by atmospheric refraction, and their propagation trajectory will bend to the ground. In which a part of the electromagnetic wave is trapped in a thin atmosphere with a certain thickness, and propagates in a similar manner to the electromagnetic wave in a metal waveguide, as shown in fig. 1. This phenomenon is known as the propagation of electromagnetic waves through atmospheric waveguides (also known as tropospheric waveguides).
The atmospheric waveguiding phenomenon causes signals transmitted by a gNB (5G base station) to propagate hundreds of kilometers away with little path loss, thereby causing interference to the remote gNB. In particular, when the atmospheric waveguide phenomenon exists, as shown in fig. 2, a downlink signal of an interfering gNB may propagate over a long distance and interfere with an uplink signal of an interfered gNB that is far away therefrom. And the farther the interfering party is from the interfered party, the larger the time delay is, the more symbols are interfered on the uplink of the interfered party. Since the remote interference is generated from the accumulation of remote gNB interference at a plurality of different distances, the interference Thermal noise IoT (interference over Thermal noise) of the interfered party exhibits a "tilt" characteristic, the symbols closer to the guard interval are subjected to the accumulated interference caused by more interfered parties, and the interference power caused by the closer interfered parties is larger, which results in the "tilt" characteristic of IoT in the time domain as shown in fig. 3.
The current NR-RIM scenario is based on symmetry rules, and the remote interference scenario can be mainly summarized as a symmetric interference scenario (as shown in fig. 4) and an asymmetric interference scenario (as shown in fig. 5). The symmetric interference scenario mainly refers to that when the atmospheric waveguide phenomenon occurs, IoT is symmetrically increased at two gnbs causing remote interference with each other, and whether this occurs depends on the network topology of the system, which is relatively easy to occur in a point-to-point or cluster-to-cluster network topology with the same density. While asymmetric interference mainly refers to the phenomenon of atmospheric waveguide, IoT increases asymmetrically at two gnbs causing remote interference with each other, which is mainly caused by different distribution densities of gnbs in a specific network topology or different areas, so that different gnbs may be subjected to different amounts of remote interference caused by different levels of gnbs.
Therefore, an embodiment of the present invention provides a network side device and a method for performing remote interference suppression thereof, so as to solve the problems in the foregoing scenarios.
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
With respect to the above scenario, the following describes an embodiment of the present invention in further detail with reference to the drawings of the specification.
The first embodiment is as follows:
as shown in fig. 6, this embodiment provides a method for performing remote interference suppression by a network side device, where the network side device is an interferer, and the method specifically includes the following steps:
601, when monitoring and receiving a reference signal RS1 sent by an interfered party, a network side device determines to generate remote interference on the interfered party;
when the network side equipment transmits a wireless signal, if the atmospheric waveguide phenomenon generates remote interference on other network side equipment, the interfered party can monitor that the network side equipment is subjected to the remote interference, and sends a reference signal RS1 to the interfering party to inform the interfering party that the interfering party generates the remote interference on the interfered party; if no remote interference exists, the interfered party does not send the reference signal RS1 to the interfering party, so the network side equipment can determine whether remote interference is generated to the interfered party by monitoring whether RS1 is received.
Step 602, determining a downlink symbol position generating remote interference according to the time position of the received reference signal RS 1;
the above specific manner of determining the position of the downlink symbol generating the remote interference according to the time position of the received reference signal RS1 may refer to the existing determination manner, and will not be described in detail here.
Step 603, reducing the signal transmitting power at the position of the downlink symbol to a preset power threshold.
In the method, when the network side equipment detects that the remote interference is generated, the signal transmitting power at the position of the downlink symbol generating the remote interference is directly reduced to the preset power threshold value, so that the interference suppression process is accelerated, frequent signaling interaction is reduced, and the resource loss of the system is reduced.
As shown in fig. 7, when the interfering party adopts the above-mentioned remote interference suppression method in this embodiment, a specific interaction flow between the interfering party and the interfered party is as follows:
step 0, the interference party transmits a wireless signal to generate remote interference on the interfered party;
step 1, an interfered party monitors that an uplink is subjected to remote interference;
specifically, the interferer may monitor that the uplink signal is remotely interfered by detecting interfering thermal noise IoT or other means;
step 2, before the remote interference disappears, the interfered party continuously sends a specially designed reference signal RS1 to the interfering party so as to indicate the remote interference to the interfering party;
step 3, after receiving the RS1 from the interfered party, the interfering party determines to generate remote interference on the interfered party, and performs remote interference suppression according to the received RS1 and the method for performing remote interference suppression;
specifically, the interferer determines the downlink symbol position where remote interference occurs according to the time position of the received reference signal RS1, and reduces the signal transmission power at the downlink symbol position to a preset power threshold.
The time positions of the reference signal RS1 are specifically the start position and duration/disappearance position of the reference signal RS1, and the interferer can determine the downlink D L symbol position generating the remote interference and the accurate number of D L symbols according to the time position of the reference signal RS 1.
Step 4, when the interfered party does not monitor that the uplink is subjected to remote interference within a period of time, determining that the remote interference disappears, and stopping sending RS1 to the interfering party;
and step 5, when the interference party does not detect the RS1 within a period of time, determining that the remote interference disappears.
As another optional implementation manner, after the interfering party reduces the signal transmission power at the downlink symbol position to a preset power threshold, the method further includes:
monitoring whether a reference signal RS1 sent by the interfered party is received again;
and if the reference signal RS1 sent by the interfered party is received again, discarding the downlink symbol at the position of the D L symbol generating the remote interference.
In this embodiment, after detecting that the uplink is subjected to remote interference and performing interference suppression by reducing the transmission power for the first time, it is determined whether the remote interference disappears according to whether the reference RS1 is received again, and if the remote interference does not disappear, the downlink symbol generating the remote interference is directly discarded. If the remote interference disappears, in order to further guarantee the user service quality of the cell where the interfering party is located, an existing convergence mechanism can be adopted to determine a convergence value which does not generate the remote interference and can guarantee the user service quality of the cell where the interfering party is located, and therefore the convergence value is adopted as the transmission power to transmit the wireless signal. Specifically, an initial power adjustment interval may be determined according to the signal transmission power before the transmission power is initially reduced and a preset power threshold, and then the remote interference cancellation and the convergence accuracy are used as convergence end conditions to converge according to a corresponding convergence mechanism.
As an optional implementation manner, in this embodiment, increasing the signal transmission power according to a preset power adjustment method includes:
determining a power adjustment interval for increasing the signal transmission power initially;
converging the power adjustment interval;
and taking the intermediate power value of the power adjustment interval at the end of convergence as the signal transmitting power.
In the convergence process, the middle value of the power adjustment interval is directly taken as the transmitting power to transmit the wireless signals, and when the power adjustment interval is converged, the remote interference disappearance and the convergence precision are taken as convergence ending conditions, so that the convergence speed is high, and the convergence precision is high.
The initial power adjustment interval may be, but is not limited to, a power interval that is composed of a preset power threshold as an interval lower limit and a signal transmission power before the signal transmission power is reduced to the preset power threshold as an upper limit.
Specifically, the converging the power adjustment interval when the remote interference cancellation and the convergence accuracy are used as convergence end conditions includes:
monitoring whether the reference signal RS1 is received again by using the intermediate power value of the current power adjustment interval as the signal transmitting power;
if the reference signal RS1 is received again, updating the maximum value of the power adjustment interval to the intermediate power value for convergence again;
if the reference signal RS1 is not received again, convergence is finished when the difference value of the signal transmitting powers used for the last two times is smaller than the threshold value, otherwise, the minimum value of the power adjusting interval is updated to the intermediate power value for convergence again.
For a more clear description of the convergence process, referring to fig. 8, after the signal transmission power is shifted to the preset power threshold and the reference signal RS1 is received again, the specific process of increasing the signal transmission power according to the preset power adjustment method in this embodiment is as follows:
step 1) determining an initial power adjustment interval [ P ] for increasing the signal transmission powersPe]And Pold；
Specifically, the preset work is performedThe rate threshold is set to the minimum value P of the power adjustment intervalsSetting the signal transmitting power before the signal transmitting power is reduced to the preset power threshold value as the maximum value P of the power adjusting intervale；
Setting the signal transmitting power before the signal transmitting power is reduced to the preset power threshold value as the signal transmitting power P used last timeold；
Step 2) using the formula { Pcur＝(Ps+Pe) /2 calculating the power adjustment interval [ P ] at the current momentsPe]Intermediate power value Pcur；
Step 3) the current PcurTransmitting a wireless signal as a signal transmission power;
step 4) judging whether RS1 is received again, if RS1 is received again, entering step 5), otherwise, entering step 6);
step 5) updating the maximum value P of the power adjustment intervaleIs PcurAnd update PoldAnd returning to the step 2);
that is, the remote interference does not disappear at the current time, which indicates that the current signal transmission power needs to be adjusted down, so that the P is updatedeAnd PoldI.e. at this time Pe＝Pcur、Pold＝Pcur；
Step 6) judging PoldAnd PcurWhether the difference is smaller than a set threshold value or not, if so, entering a step 7), and otherwise, entering a step 8);
judging whether the following formula 1 is satisfied, if so, the convergence mechanism meets the stop condition, and ending the convergence process; otherwise, it states PcurIt is still not accurate enough, so the minimum value of the power adjustment interval needs to be updated;
equation 1: i Pcur-Pold||≤；
Step 7) the convergence mechanism meets the stop condition, the convergence process is ended, and the current P is utilizedcurTransmitting a wireless signal as a signal transmission power;
and when the remote interference disappears and the error is smaller than the set value and is met, stopping the binary attenuation mechanism, and ending convergence to obtain the finally used signal transmitting power.
Step 8) updating the minimum value P of the power adjustment intervalsIs Pcur，PoldIs PcurAnd returning to the step 2); i.e. PoldAnd PcurThe difference is not less than the set value, which indicates that PcurIs still not accurate enough, so P is updatedsAnd PoldI.e. at this time Ps＝Pcur、Pold＝Pcur。
In the method, the power from bottom to top is promoted by a dichotomy mechanism to further converge the transmitting power to an intermediate value, and the service quality of the cell user where the interference party is located is ensured under the condition of ensuring that the interference is inhibited. Compared with other power attenuation modes, the dichotomy power attenuation can more quickly position the transmitting power value meeting the requirements of both sides, and reduces resource loss.
As an alternative implementation, the preset power threshold is determined as follows:
and determining the preset power threshold according to the minimum transmitting power meeting the QoS (quality of service) requirement of the cell user.
In the method, the preset power threshold is determined according to the minimum transmitting power meeting the QoS (quality of service) requirement of the cell user, so that the service quality of the cell user transmitting signals is ensured.
In the embodiment, when the reference standard is the user service quality of the interference side gNB, the lowest transmission power P meeting the service quality QoS requirement of the cell user is determinedminP can be bound, but is not limited to, byminDetermining a preset power threshold value P:
1) the minimum transmitting power P is usedminDetermining the power value as a preset power threshold value P;
2) the minimum transmitting power P is usedminAdding the result of the preset increment to determine the preset power threshold value P, wherein the preset increment is more than zero and less than the maximum transmitting power P meeting the user service qualitymaxAnd PminDifference of (a), above PmaxUser clothes for meeting cell where interference party is locatedMaximum transmit power for quality of service;
3) the minimum transmitting power P is usedminThe result of the multiplication with a predetermined weight factor, which should be greater than 1 and less than (P), is determined as the predetermined power threshold Pmax/Pmin) As a result of (1), the above-mentioned PmaxThe maximum transmission power for satisfying the service quality of the cell user where the interference party is located.
As another alternative, the preset power threshold is determined as follows:
determining a power fluctuation range corresponding to signal transmission power which does not generate remote interference on an interfered party in a previous period of time;
and determining one half of the sum of the maximum power value and the minimum power value in the power fluctuation range as the preset power threshold value.
In this embodiment, according to the historical information of the signal transmission power that does not generate remote interference on the interfered party, it is determined that the value of the signal transmission power of the interfering party has a floating range Pt∈[Pt min,Pt max]In which P ist minFor signal transmission power minimum, Pt maxSignal transmit power maximum;
1) when the user service quality of the interfering party gNB needs to be considered, the transmission power of the interfering party gNB needs to be guaranteed, and at this time, the preset power threshold value P is equal to Pt max；
2) When the user service quality of the interfered party gNB needs to be considered, the signal transmission power of the interfering party needs to be reduced as much as possible, and in this case, P is Pt min；
3) When the interference side and the gNB of the interference side need to cooperate or there is no explicit user quality of service requirement, it only needs to specify that the preset power threshold is determined as { P ═ (P) at this timet min+Pt max) /2} to ensure fairness for the interferer and the interfering's gbb. In the method, the preset power threshold is determined according to the historical information of the signal transmitting power, so that the reasonability of the setting of the preset power threshold is ensured.
As another optional implementation manner, when the reference standard is history information of signal transmission power of the interferer gNB, a value floating range of the signal transmission power that does not cause remote interference is determined according to the history information, and the value floating range is subjected to corresponding averaging value to obtain a preset power threshold.
As shown in fig. 9, a complete flow of remote interference suppression by a network side device is given as follows:
step 901, when monitoring and receiving a reference signal RS1 sent by an interfered party, determining that remote interference is generated on the interfered party;
step 902, determining a downlink symbol position generating remote interference according to a time position of receiving a reference signal RS 1;
step 903, reducing the signal transmitting power at the position of the downlink symbol to a preset power threshold;
step 904, using a preset power threshold value as a signal transmission power to transmit a wireless signal;
step 905, judging whether the reference signal RS1 sent by the interfered party is received again, if so, entering step 906, otherwise, entering step 907;
when the reference signal RS1 sent by the interfered party is received again, it indicates that the interfering party still generates remote interference to the interfered party.
Step 906, discarding the downlink symbol generating the remote interference;
step 907, increasing the signal transmitting power according to a preset power adjusting method;
step 908, transmit the wireless signal with the increased signal transmit power.
In the invention, an interference party gNB (gNB) identifies itself as an interference party by detecting a reference signal RS1 sent by the interfered party gNB, and simultaneously locates an accurate D L symbol generating remote interference through the time position of RS1, directly reduces the power to a threshold value P at the interference party, then judges whether the remote interference disappears, and directly discards the corresponding D L symbol generating the remote interference if the remote interference does not disappear, thereby solving the remote interference.
When the remote interference is found to be solved after the power is attenuated to the preset power threshold, the power is promoted from bottom to top by means of a dichotomy mechanism, the power is further accurate, and the service quality of a user is guaranteed under the condition that the interference is restrained.
Example two:
as shown in fig. 10, based on the same inventive concept, the present embodiment provides a network side device for performing remote interference suppression, which includes a processor 901 and a memory 902, wherein the processor is configured to read a program in the memory and execute the following steps:
when monitoring and receiving a reference signal RS1 sent by an interfered party, determining that remote interference is generated on the interfered party;
determining the position of a downlink symbol generating remote interference according to the time position of the received reference signal RS 1;
and reducing the signal transmitting power at the position of the downlink symbol to a preset power threshold.
Optionally, the processor is further configured to, after the signal transmission power at the downlink symbol position is reduced to a preset power threshold, monitor whether a reference signal RS1 sent by an interfered party is received again;
if the reference signal RS1 sent by the interfered party is not received again, the signal transmitting power is increased according to a preset power adjusting method;
and if the reference signal RS1 sent by the interfered party is received again, discarding the downlink symbol at the position of the downlink symbol according to the time position of the reference signal RS1 received again.
The processor is specifically configured to determine a power adjustment interval for increasing the signal transmission power initially; converging the power adjustment interval by a dichotomy; and taking the intermediate power value of the power adjustment interval at the end of convergence as the signal transmitting power.
The processor is specifically configured to monitor whether the reference signal RS1 is received again, using the intermediate power value of the current power adjustment interval as the signal transmission power;
if the reference signal RS1 is received again, updating the maximum value of the power adjustment interval to the intermediate power value for convergence again;
if the reference signal RS1 is not received again, convergence is finished when the difference value of the signal transmitting powers used for the last two times is smaller than the threshold value, otherwise, the minimum value of the power adjusting interval is updated to the intermediate power value for convergence again.
The processor is specifically configured to determine the preset power threshold by:
and determining the preset power threshold according to the minimum transmitting power meeting the QoS (quality of service) requirement of the cell user.
The processor is specifically configured to determine the preset power threshold by:
determining a power fluctuation range corresponding to signal transmission power which does not generate remote interference on an interfered party in a previous period of time;
and determining one half of the sum of the maximum power value and the minimum power value in the power fluctuation range as the preset power threshold value.
As shown in fig. 11, based on the same inventive concept, the present embodiment provides an apparatus for performing remote interference suppression, the apparatus including:
a remote interference determining unit 1001, configured to determine that remote interference is generated on an interfered party when monitoring that a reference signal RS1 sent by the interfered party is received;
a downlink symbol position determining unit 1002, configured to determine, according to a time position of receiving a reference signal RS1, a downlink symbol position where remote interference is generated;
a signal transmission power adjusting unit 1003, configured to reduce the signal transmission power at the downlink symbol position to a preset power threshold.
Optionally, the signal transmission power adjusting unit is further configured to monitor whether a reference signal RS1 sent by an interfered party is received again after the signal transmission power at the downlink symbol position is reduced to a preset power threshold;
if the reference signal RS1 sent by the interfered party is not received again, the signal transmitting power is increased according to a preset power adjusting method;
and if the reference signal RS1 sent by the interfered party is received again, discarding the downlink symbol at the position of the downlink symbol according to the time position of the reference signal RS1 received again.
The signal transmitting power adjusting unit is configured to determine a power adjustment interval for increasing the signal transmitting power initially; converging the power adjustment interval by a dichotomy; and taking the intermediate power value of the power adjustment interval at the end of convergence as the signal transmitting power.
The signal transmission power adjusting unit is configured to monitor whether the reference signal RS1 is received again, using the intermediate power value of the current power adjustment interval as the signal transmission power;
if the reference signal RS1 is received again, updating the maximum value of the power adjustment interval to the intermediate power value for convergence again;
if the reference signal RS1 is not received again, convergence is finished when the difference value of the signal transmitting powers used for the last two times is smaller than the threshold value, otherwise, the minimum value of the power adjusting interval is updated to the intermediate power value for convergence again.
The signal transmission power adjusting unit is configured to determine the preset power threshold by:
and determining the preset power threshold according to the minimum transmitting power meeting the QoS (quality of service) requirement of the cell user.
The signal transmission power adjusting unit is configured to determine the preset power threshold by:
determining a power fluctuation range corresponding to signal transmission power which does not generate remote interference on an interfered party in a previous period of time;
and determining one half of the sum of the maximum power value and the minimum power value in the power fluctuation range as the preset power threshold value.
Example three:
the present embodiment provides a computer-readable non-volatile storage medium, which includes program code for causing a computing terminal to perform the steps of the method according to the first embodiment of the present invention when the program code runs on the computing terminal.
The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, 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, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.
Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
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 (10)

1. A method for remote interference suppression by a network side device is characterized by comprising the following steps:
when monitoring and receiving a reference signal RS1 sent by an interfered party, network side equipment determines that remote interference is generated on the interfered party;
determining the position of a downlink symbol generating remote interference according to the time position of the received reference signal RS 1;
and reducing the signal transmitting power at the position of the downlink symbol to a preset power threshold value.
2. The method of claim 1, wherein after reducing the signal transmission power at the downlink symbol position to a preset power threshold, further comprising:
monitoring whether a reference signal RS1 sent by the interfered party is received again;
if the reference signal RS1 sent by the interfered party is not received again, the signal transmitting power is increased according to a preset power adjusting method;
and if the reference signal RS1 sent by the interfered party is received again, discarding the downlink symbol at the position of the downlink symbol according to the time position of the reference signal RS1 received again.
3. The method of claim 1 or 2, wherein increasing the signal transmission power according to a predetermined power adjustment method comprises:
determining a power adjustment interval for increasing the signal transmission power initially;
converging the power adjustment interval;
and taking the intermediate power value of the power adjustment interval at the end of convergence as the signal transmitting power.
4. The method of claim 3, wherein converging the power adjustment interval comprises:
monitoring whether the reference signal RS1 is received again by using the intermediate power value of the current power adjustment interval as the signal transmitting power;
if the reference signal RS1 is received again, updating the maximum value of the power adjustment interval to the intermediate power value for convergence again;
if the reference signal RS1 is not received again, convergence is finished when the difference value of the signal transmitting powers used for the last two times is smaller than the threshold value, otherwise, the minimum value of the power adjusting interval is updated to the intermediate power value for convergence again.
5. The method of claim 1 or 2, wherein the preset power threshold is determined by:
and determining the preset power threshold according to the minimum transmitting power meeting the QoS (quality of service) requirement of the cell user.
6. The method of claim 1 or 2, wherein the preset power threshold is determined by:
determining a power fluctuation range corresponding to signal transmission power which does not generate remote interference on an interfered party in a previous period of time;
and determining one half of the sum of the maximum power value and the minimum power value in the power fluctuation range as the preset power threshold value.
7. A network side device for remote interference mitigation, the device comprising a processor and a processor, wherein the processor is configured to read a program stored in a memory and execute the following steps: monitoring and receiving a reference signal RS1 sent by an interfered party, and determining that remote interference is generated on the interfered party;
determining the position of a downlink symbol generating remote interference according to the time position of the received reference signal RS 1;
and reducing the signal transmitting power at the position of the downlink symbol to a preset power threshold value.
8. The device of claim 7, wherein the processor is further configured to: after the signal transmission power at the position of the downlink symbol is reduced to a preset power threshold, monitoring whether a reference signal RS1 sent by an interfered party is received again;
if the reference signal RS1 sent by the interfered party is not received again, the signal transmitting power is increased according to a preset power adjusting method;
and if the reference signal RS1 sent by the interfered party is received again, discarding the downlink symbol at the position of the downlink symbol according to the time position of the reference signal RS1 received again.
9. The device of claim 7 or 8, wherein the processor is specifically configured to: determining a power adjustment interval for increasing the signal transmission power initially;
converging the power adjustment interval;
and taking the intermediate power value of the power adjustment interval at the end of convergence as the signal transmitting power.
10. A computer-readable medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
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