CN110752900B

CN110752900B - Reference signal interception method and device, communication equipment and storage medium

Info

Publication number: CN110752900B
Application number: CN201810814721.4A
Authority: CN
Inventors: 柯颋; 夏亮; 邵华; 王启星; 刘光毅
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: 2018-07-23
Filing date: 2018-07-23
Publication date: 2022-05-13
Anticipated expiration: 2038-07-23
Also published as: CN110752900A

Abstract

The embodiment of the invention discloses a reference signal interception method and device, communication equipment and a storage medium. The method comprises the following steps: determining a reference frame structure; determining a first moment according to a reference frame structure and downlink time domain transmission resource allocation used when the first base station communicates with the UE; and listening to a first reference signal transmitted by a second base station from the first time.

Description

Reference signal interception method and device, communication equipment and storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for intercepting a reference signal, a communication device, and a storage medium.

Background

In the prior art, a base station performs interference interception on a remote base station, and generally, the interception is started at a predetermined point in a time domain according to a reference frame structure. In fact, there are cases where it is not necessary for the base station to listen from a fixed set predetermined point, resulting in invalid listening of the base station, which obviously results in increased load and power consumption of the base station, and sometimes invalid listening may even result in false interference rejection alarms.

Disclosure of Invention

In view of the above, it is desirable to provide a method and apparatus for reference signal listening, a communication device, and a storage medium, so as to at least partially reduce the problems of invalid listening and false interference rejection warning caused by invalid listening.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a reference signal listening method, applied to a first base station, including:

determining a reference frame structure;

determining a first moment according to a reference frame structure and downlink time domain transmission resource allocation used when the first base station communicates with the UE;

and listening to a first reference signal transmitted by a second base station from the first time.

Optionally, the first reference signal is used for detecting a far-end base station interference phenomenon.

Optionally, the reference frame structure comprises at least: a frame period of a reference frame, a first reference point, and a second reference point;

the determining a first time according to the reference frame structure and the downlink time domain transmission resource configuration used when the first base station communicates with the UE includes:

and determining a first moment according to the frame period, the first reference point, the second reference point and the downlink time domain transmission resource configuration used when the first base station communicates with the UE.

Optionally, in the reference frame structure, the first time is no earlier than the first reference point, and a time interval from the first time to the first reference point is less than or equal to a first time duration;

the first duration is less than or equal to a second duration;

the second duration is: and the time interval from the end time of the last transmission resource of the frame period corresponding to the configuration of the reference frame structure and the downlink time domain transmission resource used by the first base station for communicating with the UE to the second reference point.

Optionally, the first duration is equal to the second duration minus a preset constant.

Optionally, the listening to the first reference signal transmitted by the second base station from the first time includes:

and listening the first reference signal from any time in the first time domain resource, wherein the time interval from the starting time of the next time domain resource of the first time domain resource to the first reference point is greater than the first duration.

Optionally said determining a reference frame structure, comprising: and determining the reference frame structure according to at least one of the presetting, the network management unit configuration or the signaling indication between the base stations.

Optionally, when the first base station determines the reference frame structure through at least one of network management unit configuration and inter-base station signaling indication, the first base station receives at least one of the following indication information:

receiving first indication information, wherein the first indication information is used for determining the frame period of the reference frame;

receiving second indication information, wherein the second indication information is used for determining a second reference point, the second indication information includes a third duration, and a time interval from the second reference point to a preset boundary of the frame period is equal to the third duration;

receiving third indication information, wherein the third indication information is used for determining a first reference point, the third indication information includes a fourth time length, a time interval between the first reference point and the second reference point is equal to the fourth time length, and the first reference point is not earlier than the second reference point in the frame period;

receiving fourth indication information, wherein the fourth indication information includes: a fifth duration for indicating the first reference signal time domain length; the fifth duration is no shorter than a time domain length between the first reference point and the second reference point.

Optionally, a time interval between the first time and the first reference point is less than the fifth time length.

Optionally, the method further comprises:

transmitting a second reference signal in a preset time interval, wherein the starting time of the preset time interval is as follows: subtracting a sixth duration from the second reference point, wherein the end time of the preset time interval is the second reference point.

Optionally, the sixth duration is determined by the first base station according to a predetermined rule,

or,

the sixth duration is determined by the first base station according to the received fifth indication information, wherein the fifth indication information is determined according to at least one of network management unit configuration information and inter-base station signaling.

In a second aspect, an embodiment of the present invention provides a reference signal listening apparatus, applied to a first base station, including:

a first determining module for determining a reference frame structure;

the second determining module is used for determining a first moment according to a reference frame structure and downlink time domain transmission resource allocation used when the first base station is communicated with the UE;

and the interception module is used for intercepting a first reference signal sent by a second base station from the first moment.

In a third aspect, an embodiment of the present invention provides a communication device, including:

a communication interface for transmitting and receiving information;

a memory for storing information;

and the processor is respectively connected with the communication interface and the memory and is used for realizing the reference signal interception method provided by one or more technical schemes by executing the computer executable instructions stored in the memory.

In a fourth aspect, embodiments of the present invention provide a computer storage medium having stored thereon computer-executable instructions; after being executed, the computer-executable instructions can implement the reference signal listening method provided by one or more of the foregoing technical solutions.

In the interception scheme of the reference signal provided in the embodiment of the present invention, the starting time (i.e. the first time) for intercepting the first reference signal sent by another base station is determined according to the reference frame structure and the downlink time domain transmission resource configured by the base station itself, so that if the downlink time domain resource is not set at the corresponding time domain position of the current first base station, the downlink signal of the current first base station cannot cause interference (e.g. far-end interference) to the other base station at the corresponding time domain position, and it is not necessary to start to intercept the first reference signal sent by the second base station at the first reference point, so that unnecessary interception can be reduced, and thus, the load and power consumption of the base station caused by unnecessary interception can be reduced. More importantly, the first base station does not perform interference elimination processing such as wrong interference avoidance processing and the like due to invalid interception, so that the invalid interception is reduced, the load and power consumption caused by the invalid interception are reduced, and the occurrence probability of wrong interference elimination is reduced.

Drawings

Fig. 1A is a schematic structural diagram of a network topology provided in an embodiment of the present invention;

fig. 1B is a schematic diagram of an interference characteristic provided in an embodiment of the present invention;

fig. 2 is a schematic flow chart illustrating an implementation of the interference management technique of the remote base station according to the embodiment of the present invention;

fig. 3 is a schematic flow chart of a remote base station interference management technique based on an interference self-suppression working mode according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating a method for determining a location of a Reference Signal (RS) time domain resource based on a Guard Period (GP) according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a semi-static frame adopted by a New Radio (NR) of 5G in an embodiment of the present invention;

FIG. 6 is a diagram illustrating a structure of a reference frame according to an embodiment of the present invention;

FIG. 7A is a schematic illustration of a potential problem with the method of FIG. 6;

fig. 7B is a flowchart illustrating a potential problem shown in fig. 7A according to an embodiment of the present invention.

Fig. 8 is a schematic flow chart illustrating an implementation of a method for transmitting a reference signal according to an embodiment of the present invention;

fig. 9A is a schematic diagram illustrating obtaining a first duration, a second duration and interception based on a reference frame structure and a downlink time domain transmission resource configuration used when a base station communicates with a UE according to an embodiment of the present invention;

fig. 9B is another schematic diagram illustrating obtaining a first duration, a second duration and interception based on a reference frame structure and downlink time domain transmission resource allocation used when a base station communicates with a UE according to an embodiment of the present invention

Fig. 10 is a schematic flowchart of a method for listening to a reference signal according to this embodiment;

fig. 11 is a schematic structural diagram of a listening device for reference signals according to an embodiment of the present invention;

fig. 12 is a diagram of a hardware entity of a communication device according to an embodiment of the present invention.

Detailed Description

The technical solution of the present invention is further described in detail with reference to the drawings and the specific embodiments of the specification.

The following is an explanation of relevant terms to which embodiments of the present invention relate:

OS, i.e. OFDM symbol, is an abbreviation of OFDM symbol, i.e. Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing);

TDD, i.e., Time Division duplex (Time Division duplex);

a TD-LTE system, which is a Time Division Long Term Evolution (Time Division Long Term Evolution) system;

NR system, i.e. New Radio system;

UL, i.e., uplink (Up Link);

DL, i.e., downlink (Down Link);

TRP or TRxP, i.e. a Transmission & Receiver Point (or transceiver Point); in one embodiment, the TRP may be a base station;

GP, namely Guard time slot (Guard Period);

ISD, i.e. Inter Site Distance;

IoT, Interference Over Thermal;

KPI, which is a Key Performance Indicator (Key Performance Indicator);

RS, Reference Signal (Reference Signal);

CP, namely Cyclic Prefix (Cyclic Prefix);

SCS, i.e., subcarrier spacing (subcarrier spacing).

The interference at the base station remote end is described as follows. In a TDD system (including at least a TD-LTE system and an NR system), due to the co-frequency of uplink and downlink, if there is still strong received power when DL signals of other base stations are propagated through space to reach the UL signal receiving window of the local base station, the DL signals of other base stations will cause strong interference to UL data reception of the local base station, that is, there is strong cross link interference. The interfering base station may be from a near-end neighboring base station of the local base station or from a far-end base station.

When all base stations in the TDD network adopt the same frame structure configuration and maintain time-frequency synchronization, the problem of cross-link interference is generally not serious.

Fig. 1A is a network topology structure diagram, and fig. 1B is a schematic diagram illustrating an interference characteristic, which is combined with fig. 1A and fig. 1B, to consider a cross-link interference situation of a near-end neighbor base station TRP2 and a far-end base station TRP3 with a local base station TRP 1.

First consider the cross-link interference problem of a near-end neighbor base station to a local base station (i.e., TRP2DL interferes with TRP1 UL). When an operator deploys a TDD network, it is ensured that an uplink-downlink transition guard time slot (GP) is larger than an inter-site distance (ISD), so that DL signals of near-end neighboring base stations fall in the GP of a local base station after being spatially propagated, and therefore the DL signals of the near-end neighboring base stations generally do not cause interference to UL data reception of the local base station.

Consider again the cross-link interference problem of the remote base station with the local base station (i.e. TRP3DL interferes with TRP1 UL). Although the DL signal of the remote base station (e.g. TRP3) may fall within the UL signal reception window of the local base station (e.g. TRP1) after being spatially propagated, since the signal reception power rapidly decays with the increase of the distance traveled in the normal climate environment, the DL signal of the remote base station falling within the UL signal reception window of the local base station is usually very weak, and its interference energy is generally negligible, so the DL signal of the remote base station generally does not cause interference to the UL data reception of the local base station.

However, in some special weather environments (such as an atmospheric air waveguide), the DL signal of the remote base station may cause strong interference to the UL data reception of the local base station. The atmospheric waveguide is a phenomenon that electric wave forms super-refraction propagation in a troposphere due to the fact that a layer with inverse temperature or water vapor which is sharply reduced along with the height exists in the troposphere, and most electric wave radiation is limited to propagate in the layer. When the atmospheric wave guide occurs, the DL signal of the remote base station still has high energy after being transmitted over an ultra-long distance of tens or hundreds of kilometers. Due to the long distance, the DL signal of the remote base station will fall into the UL signal receiving window of the local base station after being spatially propagated; and due to the atmospheric waveguide phenomenon, the signal power of the DL signal of the far-end base station is very strong after the DL signal is remotely transmitted, so that when the atmospheric waveguide phenomenon exists, the DL signal of the far-end base station can cause strong interference to UL data reception of the local base station.

In the TD-LTE network, the large-area uplink disturbance of TD-LTE in many provinces such as Jiangsu, Anhui, Hainan and Henan is found, the uplink IOT lifting can reach 25dB (decibel), and KPI indexes such as the success rate of RRC connection establishment are seriously deteriorated. The interfered cell mainly takes rural F frequency bands, and the interference time is mainly concentrated at 0:00-8: 00; the interference is easy to occur in spring and autumn, and the affected base stations are hundreds to tens of thousands of different.

The general idea of dealing with the problem of far-end base station interference includes the following steps:

step S1, positioning the interference base station (i.e. interference source);

step S2, an interference back-off operation is performed on the located interfering base station, such as reducing the downlink timeslot of the interfering base station, so as to reduce the interference of the DL signal to the UL data reception of other base stations.

In order to locate interfering base stations, an intuitive solution is: the interfering base stations are made to transmit dedicated interference detection reference signals that can distinguish between different base stations. In this way, the interfered base station can judge who is the interference source of the interfered base station by detecting the reference signal sent by the interfered base station. However, it should be noted that the reference signal is only used for discovering the far-end interference phenomenon between the base stations, and therefore, for normal data transmission of the receiving and transmitting base stations, the reference signal is a useless signal and belongs to network signaling overhead.

Considering that the far-end interference phenomenon is usually caused by the atmospheric waveguide phenomenon, which is not always generated, the design scheme is inefficient for the whole network in order to suppress the accidental far-end interference problem and make the network consume a large amount of resources to regularly receive and transmit the dedicated reference signal. Further, after the interfered base station is determined to be influenced by the potential far-end interference, the special interference detection reference signal capable of distinguishing different base stations is sent. The transmission of the reference signal is therefore conditional, i.e. it is transmitted only if the victim base station guesses itself to be affected by far-end interference. Since the frequent transmission behavior is changed into the triggered transmission behavior, the scheme is expected to significantly reduce the network resource overhead required for transmitting the reference signal when the far-end interference phenomenon does not frequently occur.

Fig. 2 is a schematic diagram illustrating an implementation flow of an adopted interference management technique of a remote base station, and as shown in fig. 2, the interference management technique of the remote base station is marked as an interference source non-self-suppression mode or a background artificial suppression mode, that is, a mode 1 includes:

step S200, DL data of the interfering base station interferes UL data receiving behavior of the interfered base station;

step S201, the interfered base station detects the interference characteristic suffered by the UL data and determines that the interfered base station is interfered by the remote base station;

in step S202, the victim base station transmits a reference signal so that it can be detected by other base stations (including the aggressor base stations). Wherein the transmission of the reference signal is conditional, i.e. the transmission is only performed if the victim base station guesses that it is affected by the far-end interference;

step S203, the interference base station listens for the reference signal.

The behavior of the interference base station for intercepting the reference signal is unconditional, namely the interference base station always tries to intercept the reference signal;

and step S204, after the interference base station detects the reference signal, the interference base station reports an interference measurement result to the artificial background server.

In one embodiment, the interference measurement may include the following information: the mth base station detects a reference signal sent by the nth base station, and the strength of the reference signal is X dBm;

step S205, after receiving the interference measurement information reported by the interference-exerting base station, the background server configures the interference-exerting base station to perform interference backoff operation if the interference measurement information is determined to be an interference source through manual processing;

and step S206, the interference base station implements interference backspacing operation according to the configuration of the background server.

As can be seen from mode 1 shown in fig. 2, this solution has two characteristics:

the underlying premise assumption that this scheme can work is: the channels of the interfered base station and the interfered base station have reciprocity. That is, when the interfered base station and the interfering base station adopt the same frame structure, the channel attenuation characteristics from the interfering base station to the interfered base station and the channel attenuation characteristics from the interfering base station to the interfering base station are consistent, so that the interfering base station can also detect when the interfered base station sends a reference signal. The scheme puts special requirements on the design of the reference signal, namely the requirement that a signal source can be positioned through the reference signal sent by the interfered base station. The signal source is marked as a disturbed base station sending a reference signal.

In some embodiments, the operations related to manual background can also be removed in mode 1 (interference source non-self-suppression mode or background manual suppression mode), resulting in a remote base station interference management technique (method) based on interference source suppression, which is denoted as interference source suppression mode, i.e. mode 2. Fig. 3 is a flowchart illustrating an implementation of a remote base station interference management technique based on interference suppression, as shown in fig. 3, the technique includes:

step S300, the DL data of the interfering base station interferes the UL data receiving behavior of the interfered base station;

step S301, the interfered base station detects the interference characteristic suffered by the UL data and determines that the interfered base station is interfered by the far-end base station;

in step S302, the victim base station transmits a reference signal so that it can be detected by other base stations (including the aggressor base stations). Wherein the transmission of the reference signal is conditional, i.e. the transmission is only performed if the victim base station guesses that it is affected by the far-end interference;

step S303, the interference base station listens for the reference signal.

The behavior of the interference base station for intercepting the reference signal is unconditional, namely the interference base station always tries to intercept the reference signals sent by other base stations so as to intercept the reference signal sent by the interfered base station;

step S304, after the interference base station detects the reference signal, the interference base station determines whether to perform interference back-off operation based on the independent judgment of the interference base station.

As can be seen from mode 2 shown in fig. 3: as with mode 1, the underlying premise assumption that mode 2 can work is still: the channels of the interfered base station and the interfered base station have reciprocity. Unlike mode 1, however, mode 2 reduces the capability requirement for the reference signal, i.e., the signal source does not need to be located by the reference signal. After the interference base station detects the reference signal, the interference base station does not need to locate who sends the reference signal, but directly executes the interference rollback operation.

The reciprocity of the channels is described below. TD-LTE simultaneously bears uplink and downlink services on the same carrier, and reciprocity of channels can be fully utilized. Channel reciprocity is the basis for TD-LTE to use 8-antenna and enhanced multi-antenna techniques (beamforming techniques). The channel reciprocity of TD-LTE means that uplink and downlink of TD-LTE system are transmitted on different time slots of the same frequency resource, so that within a relatively short time (coherence time of channel propagation), it can be considered that the channel fading experienced by the transmission signals of uplink and downlink are the same, which is the channel reciprocity of TD-LTE. Based on the characteristic, the TD-LTE base station can estimate the channel fading that the downlink transmission signal will experience through the detection of the uplink transmission signal (such as the uplink reference signal), and thus determine the scheme and parameters of the downlink transmission, so that the feedback overhead of the terminal can be saved while the estimation accuracy of the downlink channel fading is ensured. The intelligent antenna technology of TD-LTE is realized based on channel reciprocity.

Under the technical frameworks of the mode 1 (interference source non-self-suppression mode) and the mode 2 (interference source non-self-suppression mode or background artificial suppression mode), in order to coordinate the work of the two parties, the interfered base station and the interfering base station respectively determine which time domain resources to transmit and receive the reference signals on. An intuitive solution is: and determining the time domain resource position of the reference signal sent and/or received by the interfered base station and/or the interference base station based on the GP resource position. Namely, determining the time domain resource position of the reference signal sent by the interfered base station based on the GP resource position; determining a time domain resource position of a disturbed base station for receiving a reference signal based on the GP resource position; determining a time domain resource position of a disturbed base station for sending and receiving a reference signal based on the GP resource position; determining a time domain resource position of the interference base station for receiving the reference signal based on the GP resource position; determining a time domain resource position of a reference signal sent by an interference base station based on the GP resource position; and determining the time domain resource positions of the interfered base station and the interference base station for sending and receiving the reference signals based on the GP resource positions.

Fig. 4 is a diagram illustrating a related art method for determining a location of an RS transceiving time domain resource based on a GP, where, as shown in fig. 4, when a certain TRP is configured to transmit an RS, the TRP determines to transmit the RS using at least 1 DL OS forward from a 1 st DL OS before the GP. And when a certain TRP is configured to receive the first RS, the TRP determines to listen to the RS from the 1 st UL OS after GP and backwards uses at least 1UL OS. Wherein the RS can be used for detecting the interference phenomenon of the remote base station.

In a homogeneous network, all base stations adopt the same frame structure configuration, so that all base stations transmit and receive RS on the same time domain resource, and the remote base station interference management technical frameworks shown in the

modes

1 and 2 can work normally. It should be noted, however, that in a 5G NR system, it is desirable for the base station to be able to dynamically adjust its frame structure (i.e., dynamically adjust the ratio of uplink and downlink subframes in it over a certain period of time) to adapt to dynamically changing traffic characteristics.

Fig. 5 is a schematic structural diagram of a semi-static frame that may be adopted by the 5G NR, as shown in fig. 5, a part of time domain resources at the beginning is specified to be fixedly used for DL transmission within a preset reference frame structure period T, that is, fixed downlink resources 51; a portion of the time domain resources at the end is specified to be fixed for UL transmission, i.e., fixed uplink resources 53; the remaining time domain resources 52 in the middle can flexibly determine the data transmission direction, or do not perform any data transmission, i.e. flexible uplink and downlink resources 52.

Due to the existence of the semi-static frame structure, in the 5G NR network, the heterogeneous network should be a typical network feature, that is, the actual frame structure actually adopted by different base stations may be different.

In the heterogeneous network, if the base station still determines the time domain resource position for transmitting and receiving the RS based on the actual time domain resource position of the GP, since the time lengths and the time domain starting positions of the GPs of different base stations may be different, the base stations independently select different time domain resources for transmitting and receiving the RS, and do not know which time domain resources are adopted by each other for transmitting and receiving the RS. At this time, the remote base station interference management technology frameworks shown in mode 1 and mode 2 cannot work normally.

The embodiment of the invention also provides a remote base station interference management method based on the reference frame structure, which comprises the following steps: by defining a reference frame structure independent of the actual frame structure of each base station, each base station sends/receives a remote base station interference detection reference signal according to the reference frame structure, thereby effectively avoiding the adverse effect of the base station heterogeneous problem on the remote base station interference management process.

As shown in fig. 6, a reference frame structure independent of the actual frame structure of each base station is defined, the reference frame structure comprising: a frame period T61 of the reference frame, and a first reference point 62 and a second reference point 63 in the frame period of the reference frame.

The base station sends a reference signal in a time interval [ a second reference point-a seventh time length, a second reference point ], wherein the seventh time length is the time domain length of the reference signal; and the other base stations start listening for reference signals from or after the first reference point. The second reference point-the seventh time length is the starting time of sending the reference signal, and the second reference point is the ending time of sending the reference signal.

In a heterogeneous network, the technology can work normally. Although in a heterogeneous network, the techniqueThe operation can be normally performed, but through further studies, it is found that the RS receiving method has room for further improvement. The time when the base station receives the RS is independent of the actual frame structure actually adopted when the base station communicates with the UE, that is, no matter which actual frame structure is actually adopted when the base station communicates with the UE, the starting time when the base station receives the reference signal is the first reference point. FIG. 7A is a schematic diagram illustrating a potential problem with the method shown in FIG. 6. As shown in FIG. 7A, a network may contain 3 total TRPs, each TRP₁、TRP₂And TRP₃And actual frame structures of the three TRPs are configured based on the reference frames shown in fig. 6, respectively. For convenience of description, the distances between the three are assumed to be equal, so that in an ideal case, for a certain TRP, the time delay from the other two TRPs to the TRP is the same; see, for example, FIG. 7B for TRP₂In particular, TRP₁And TRP₃Reach TRP₂The time delays of the time are equal, in other words, fig. 7B is from TRP₂In terms of time delay, TRP₁And TRP₃The frames of both are aligned.

In fig. 7B, TRP2 found the DL interference signal from TRP3 in the UL OS, corresponding to step 1 of mode 2 in fig. 3. Looking at fig. 7B, it can also be seen that the DL signal of TRP1 does not interfere with the UL data reception of TRP2 because the GP actually employed for TRP1 is large.

Detection of TRP1 the remote base station interferes with the behavior of the sounding RS and with interference back-off operations. In fig. 7B, since the far-end interference phenomenon is found, the TRP2 transmits the RS in 2DL OSs before the second reference point according to the reference frame structure shown in fig. 6, corresponding to step 2 in mode 2.

TRP1 listens to the RS from the first reference point, corresponding to step 3 in mode 2, according to the reference frame structure shown in fig. 6.

TRP1 listens to the RS on the xth (in fig. 7B, depending on the UE processing capability, X-4 or 5) UL OS, which is furthest behind the first reference point, and determines the first duration from X.

In fig. 7B, the TRP1 determines to perform an interference back-off operation due to the RS being sensed. For example, TRP1 determines that X (e.g., X ═ 5) OSs need to be rolled back. The TRP1 finds itself not transmitting DL signals in 5 OSs before the second reference point, so the TRP1 does not actually need to perform an interference back-off operation.

However, as can be seen from comparison of fig. 7B, the transmission end time of the DL signal of TRP1 is far from the second reference point, so that the DL signal of TRP1 does not actually interfere with UL reception of TRP2, and it is meaningless if TRP1 starts listening to the reference signal transmitted by TRP2 at the first reference point. Therefore, it is not necessary in fig. 7B that TRP1 starts listening for RS just before the first reference point. If TRP1 starts listening at the first reference point, TRP1 may also perform unnecessary interference back-off operations and the like due to such invalid listening to the RS transmitted by TRP 2.

In view of the above, the present embodiment provides a base station that determines the initial listening time for the base station to listen to the RS signals transmitted by other base stations according to the reference frame structure and the actual frame structure actually adopted by the base station when communicating with the UE, and is further described below with reference to more specific embodiments.

As shown in fig. 8, the present embodiment provides a reference signal listening method applied to a first base station, including:

step S801: determining a reference frame structure;

step S802: determining a first moment according to a reference frame structure and downlink time domain transmission resource allocation used when the first base station communicates with the UE;

step S803: and listening to a first reference signal transmitted by a second base station from the first time.

In this embodiment, the first base station may be considered as a base station that may cause far-end interference to the second base station, and in this embodiment, the first reference signal may be a reference signal transmitted by an interfered base station (e.g., the second base station) whose far end is interfered. In this embodiment, if the first base station is interfered by the far-end of another base station, the first base station may also send a reference signal according to the configuration of the reference frame structure, and the reference signal sent by the first base station is referred to as a second reference signal in this embodiment of the present invention.

Resources for each base station to freely configure uplink resources, downlink resources or guard intervals for switching between the uplink resources and the downlink resources are configured in the reference frame structure, and the base station can freely configure according to the reference frame structure, so that the actual frame structure of the base station is obtained.

But the resource range of the second base station transmitting the first reference signal is relatively fixed according to the reference frame structure regardless of the configuration of the respective base stations. In this embodiment, if the first base station does not configure a downlink signal causing interference at the far end of the second base station in the time domain, it is not necessary to start listening from the first reference point, otherwise, invalid listening may be generated, and the invalid listening may further cause problems such as interference avoidance malfunction.

Optionally, the reference frame structure comprises at least: a frame period of a reference frame, a first reference point, and a second reference point; the step S802 may include: and determining a first moment according to the frame period, the first reference point, the second reference point and the downlink time domain transmission resource configuration used when the first base station communicates with the UE.

In one embodiment, the first reference point may be understood as a first reference time point and the second reference point may be understood as a second reference time point, i.e. the first reference point and the second reference point are two time instants. It should be noted that the time indication units of the frame period, the first reference point, and the second reference point include: absolute time indicates a unit (e.g., seconds, milliseconds, microseconds, etc.) and/or a reference OFDM (orthogonal frequency division multiplexing) symbol number. When the time indication unit is the number of the reference OFDM symbols, the base station directly indicates the time length of the reference OFDM symbols through at least one indication information of pre-specification, static configuration of a network management unit and configuration signaling between the base stations, or indirectly indicates subcarrier spacing (SCS) of the reference OFDM symbols and Cyclic Prefix (CP) types of the reference OFDM symbols, and deduces the time length of the reference OFDM symbols.

In this embodiment the first time is equal to or later than the first reference point, typically later than the first reference point. Optionally, in the reference frame structure, the first time is no earlier than the first reference point, and a time interval from the first time to the first reference point is less than or equal to a first time duration; the first duration is less than or equal to a second duration; the second duration is: and the time interval from the end time of the last transmission resource of the frame period corresponding to the configuration of the reference frame structure and the downlink time domain transmission resource used by the first base station for communicating with the UE to the second reference point.

The value of the first duration may only be a natural number, i.e. 0 or a positive number; if the first time length is equal to 0, the first time is equal to the first reference point, and if the first time length is not equal to 0, the first time is later than the first reference point.

In this embodiment, a second time duration is introduced, where the second time duration is greater than or equal to the first time duration, and the second time duration is equal to a time interval between an end time of a last downlink time domain resource in an actual structure frame structure of the first base station and a second reference point, because the first reference signal is sent by the second base station before the second reference point. Assuming that, when the first base station performs resource allocation, the first 3 blank transmission resources before the second reference point are selected to be allocated as downlink time domain resources, and the number of blank transmission resources between the second reference point and the last downlink time domain resource before the second reference point is 2, the second time duration is equal to the product of the time duration corresponding to the 2 blank transmission resources and 2. One transmission resource here may be one transmission symbol, for example, one OFDM symbol, and may also be one slot or one micro slot. One slot includes a predetermined number of transmission symbols, and the micro slot includes less transmission symbols than one slot.

In some embodiments, the first duration is equal to the second duration minus a predetermined constant, where the predetermined constant may be a duration value corresponding to 1, 2, or 3 transmission resources.

Alternatively, the step S803 may include: and listening the first reference signal from any time in the first time domain resource, wherein the time interval from the starting time of the next time domain resource of the first time domain resource to the first reference point is greater than the first duration.

For example, if one of the time domain resources is an OFDM symbol, if the first time is located in the time domain interval in which the nth OFDM symbol is located, the time interval from the starting time of the next OFDM symbol of the nth OFDM symbol to the first reference point is greater than the first time duration, so that if the first reference signal sent by the second base station needs to be intercepted, on one hand, successful reception of the reference signal can be ensured, and on the other hand, unnecessary invalid reception can be reduced.

Optionally, the first time may be a start time of the first time domain resource or an end time of the first time domain resource, or any time between the start time and the end time of the first time domain resource.

Optionally, the first base station determines the reference frame structure according to at least one of a predefined rule, a network management unit configuration, or an inter-base station signaling indication.

For example, the first base station may determine the reference frame structure according to a predefined specification of a communication protocol. For another example, a network management unit that manages network elements such as the base station and the like may perform the reference frame structure, so the first base station may also determine the reference frame structure according to the configuration of the network management unit.

In some embodiments, signaling interaction between base stations may be performed between base stations, for example, signaling between various base stations may be interacted between base stations through an X2 interface, an S1 interface, or a backhaul link, and the signaling between base stations may carry the reference frame structure.

For example, in some embodiments, the base station determines the reference frame structure by at least one of a predefined indication method, a network management unit (e.g., Operation Administration and Maintenance (OAM)) configuration, and an inter-base station configuration signaling (e.g., backhaul link signaling), where the network management unit may manage a plurality of base stations. Here, OAM configuration refers to static configuration through a network management unit. Here, the configuration through backhaul signaling between base stations refers to: assuming that there is a global, or local, network management element in the network, the network management element may semi-statically govern (including coordinate, and/or adjust) the behavior of some or all of the base stations in the network. The network management element may be a physical entity or simply a virtual entity. The Network management unit may be referred to as a Self-Organized Network (SON) unit, a wide-area SON unit, a big data processing center, and so on. And the network management unit configures parameters such as a frame period, a first reference point, a second reference point and the like of the base station through backhaul signaling between the base stations.

In some embodiments, when the first base station determines the reference frame structure through at least one of network management unit configuration and inter-base station signaling indication, the first base station receives at least one of the following indication information:

receiving first indication information, wherein the first indication information is used for determining a frame period;

receiving second indication information, wherein the second indication information is used for determining a second reference point, the second indication information comprises a third duration, and a time interval from the second reference point to a preset boundary of the frame period is equal to the third duration;

receiving third indication information, wherein the third indication information is used for determining a first reference point, the third indication information comprises a fourth time length, a time interval between the first reference point and the second reference point is equal to the fourth time length, and the first reference point is not earlier than the second reference point in the frame period;

In some embodiments, the fifth time duration is a time domain length of the first reference signal, that is, a time duration during which the second base station continuously transmits the first reference signal. If the time interval between the first moment of starting the listening and the first reference point is longer than the fifth time length, how the first base station listens cannot listen to the first reference signal. Therefore, in this embodiment, the fifth duration is indicated by the fourth information, and thus, the first base station may set the first duration in combination with the fifth duration. For example, the first duration is less than or equal to the fifth duration. If the first time duration is longer than the fifth time duration, the first base station may never hear the first reference signal if the first base station is still listening for the first reference signal at the first time duration after the first reference point.

Optionally, the method further comprises:

transmitting a second reference signal in a preset time interval, wherein the starting time of the preset time interval is as follows: the second reference point is subtracted by a sixth time length, and the end time of the predetermined time interval may be the second reference point.

The first base station may also transmit a reference signal, in this embodiment, the reference signal transmitted by the first base station may be referred to as a second reference signal, and in this embodiment, a time domain length of the second reference signal may be equal to a time domain length of the first reference signal. Generally, the fifth duration may be a maximum duration for the second base station and the first base station to transmit the reference signal, and the sixth duration may be a duration for the first base station and the second base station to transmit the reference signal, which is dynamically determined according to a dynamic configuration of the first base station and the second base station, so in some embodiments, the sixth duration is less than or equal to the fifth duration.

Optionally, the sixth duration is determined by the first base station according to a predetermined rule, or the sixth duration is determined by the first base station according to received fifth indication information, where the fifth indication information is determined according to at least one of configuration information of a network management unit and signaling between base stations.

In some embodiments, the starting time of sending the second reference signal may be that the first base station determines a second time according to a reference signal frame structure and an uplink time domain transmission resource configuration used when the first base station communicates with the UE, and sends the second reference signal at the second time, and the base station determines the second time according to a frame period of the reference frame, the first reference point, the second reference point, and the uplink time domain transmission resource configuration used when the base station communicates with the UE served by the base station.

Optionally, in the reference frame structure, the second time is earlier than a second reference point, and a distance between the second time and the second reference point is not less than a time domain length of the second reference signal and not greater than a sum of the time domain length of the second reference signal and a sixth time duration; when the starting time of the first uplink time domain transmission resource used by the base station for communicating with the UE served by the base station is not earlier than the first reference point, the sixth time length is equal to the distance from the first reference point to the starting time of the first uplink time domain transmission resource used by the base station for communicating with the UE served by the base station; otherwise, the sixth duration is equal to 0.

Fig. 9A and 9B show two actual frame structures obtained by configuring uplink time domain resources and downlink time domain resources of a reference frame structure according to the reference frame structure. However, the positions of the first reference point and the second reference point of the actual frame structure are not changed regardless of the actual frame structure. However, the distance between the ending time of the last downlink time domain resource (D) in the actual frame structure and the second reference point is variable, that is, the second duration is variable, and the first duration is less than or equal to the second duration, so in fig. 9A, the second duration is equal to 5 time domain resources, the first duration is also 5 time domain resources, and the starting time of the intercepted first reference signal may be a certain time from the first reference point. In fig. 9B, the second duration is equal to 2 time domain resources, the first duration is equal to one time domain resource, and the listening starts from the first reference point plus the first duration.

Fig. 10 is a specific implementation provided based on this embodiment, and includes:

TRP1, TRP2, and TRP3 freely configure uplink time domain resources and downlink time domain resources based on the same reference frame structure, and obtain three different actual frame structures, in step S1: TRP2 found a distant interference from TRP3, but not TRP 1; step S2: TRP2 sends RS, TRP2 sends RS before the second reference point, and the RS reaches TRP1 and TRP3 after being transmitted at a certain distance, and the actual time is usually behind the first reference point; step S3: when the TRP1 finds that the second duration is equal to 5D according to the configuration of the downlink time domain resources (D) between the first reference points of the TRP1, and the first duration is less than or equal to the second duration, the TRP1 may listen to the time domain resources after the first reference points are separated by 5 time domain resources. In some embodiments, the method further comprises: if the current second duration is greater than the fifth duration (i.e., the time domain length of the reference signal sent by the second base station), the first base station may also not need to listen to the first reference signal sent by the second base station, and also need not execute the signed steps S2 and S3.

Thus, on the one hand, when the TRP1 starts listening for the RS at a first time after the first reference point, the number of times or duration that the TRP1 actually listens for the RS can be reduced, thereby reducing power consumption resulting from ineffective listening and listening. On the other hand, when the TRP starts listening at a first time after the first reference point, and the RS sent by the TRP2 is not listened after the first time, the interference back-off operation will not be executed based on listening, thereby reducing the interference back-off operation caused by invalid listening.

Based on the foregoing embodiments, an embodiment of the present invention provides a reference signal listening apparatus, which includes various units that may be implemented by a processor in a base station; of course, the implementation can also be realized through a specific logic circuit; in implementation, the processor may be a Central Processing Unit (CPU), a Micro Processing Unit (MPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), or the like.

Fig. 11 is a schematic diagram of a configuration of an interception device for reference signals according to an embodiment of the present invention, and as shown in fig. 11, the interception device includes a first determining unit 1101, a second determining unit 1102, and an interception unit 1103, where:

a first determining unit 1101 for determining a reference frame structure;

a second determining unit 1102, configured to determine a first time according to a reference frame structure and a downlink time domain transmission resource configuration used when the first base station communicates with the UE;

a listening unit 1103, configured to listen to the first reference signal sent by the second base station from the first time.

In some embodiments, the reference frame structure comprises at least: a frame period of a reference frame, and a first reference point and a second reference point;

the second determining unit is configured to determine the first time according to the frame period of the reference frame, the first reference point, the second reference point, and a downlink time domain transmission resource configuration used when the base station communicates with the UE.

In some embodiments, in the reference frame structure, the first time is no earlier than the first reference point, and a time interval between the first time and the first reference point is less than or equal to a first duration; the first duration is less than or equal to a second duration;

the second duration is: and the time interval from the end time of the last transmission resource of the frame period corresponding to the configuration of the reference frame structure and the downlink time domain transmission resource used by the first base station for communicating with the UE to the second reference point. For example, the first duration is equal to the second duration minus a preset constant.

In some embodiments, the first determining unit is specifically configured to determine the reference frame structure according to at least one of a predefined rule, a network management unit configuration, or an inter-base station signaling indication.

For example, the first determining unit may be configured to receive at least one of the following indication information:

The method further comprises the following steps: transmitting a second reference signal in a preset time interval, wherein the starting time of the preset time interval is as follows: subtracting a sixth duration from the second reference point, wherein the end time of the preset time interval is the second reference point.

Optionally, the listening unit 1103 may be specifically configured to listen to the first reference signal from any time in a first time domain resource, where a time interval between a starting time of a next time domain resource of the first time domain resource and the first reference point is greater than the first duration.

The above description of the apparatus embodiments, similar to the above description of the method embodiments, has similar beneficial effects as the method embodiments. For technical details not disclosed in the embodiments of the apparatus according to the invention, reference is made to the description of the embodiments of the method according to the invention for understanding.

It should be noted that, in the embodiment of the present invention, if the above-mentioned reference signal transmission method is implemented in the form of a software functional module and is sold or used as an independent product, it may also be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a base station to perform all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

Correspondingly, the embodiments of the present invention provide a communication device, such as various TRPs, e.g. a base station, including a memory storing a computer program operable on a processor and a processor implementing the steps in the method for transmitting a reference signal when executing the program.

Accordingly, an embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements steps in a method of transmitting a reference signal.

Here, it should be noted that: the above description of the storage medium and device embodiments is similar to the description of the method embodiments above, with similar advantageous effects as the method embodiments. For technical details not disclosed in the embodiments of the storage medium and the apparatus according to the invention, reference is made to the description of the embodiments of the device according to the invention.

As shown in fig. 12, a communication device provided in an embodiment of the present invention may include: a processor 1201, a communication interface 1202, and a memory 1203, the communication device may be any of the TRPs described previously, e.g., the TRP may be an evolved base station (eNB) and/or a next generation base station (gNB). The communication device specifically includes:

the processor 1201 generally controls the overall operation of the communication device.

The communication interface 1202 may enable the base station to communicate with other terminals or servers over a network.

The Memory 1203 is configured to store various computer-executable instructions such as instructions executable by the processor 1201 and application software, and may also buffer data (for example, image data, audio data, voice communication data, and video communication data) to be processed or already processed by the processor 1201 and modules in the communication device, and may be implemented by a FLASH Memory (FLASH) or a Random Access Memory (RAM).

The processor 1201 is connected to the communication interface 1202 and the memory 1203 via various buses (e.g., an integrated circuit bus), and can be used to control the communication of the communication interface 1202 and the data storage of the memory 1203, and perform any interference signal detection method according to an embodiment of the present invention, for example, the method shown in fig. 8 and/or fig. 10.

An embodiment of the present invention further provides a computer storage medium, which stores various computer-executable instructions such as a computer program, and after the computer-executable instructions are executed, the method for listening to a reference signal provided in one or more of the foregoing technical solutions can be implemented, for example, the method shown in fig. 8 and/or fig. 10. The computer storage medium may optionally be a non-transitory storage medium.

Several specific examples are provided below in connection with any of the embodiments described above:

example 1:

this example provides a reference signal interception, is applied to the base station side, includes:

the base station determines a reference frame structure, and can determine a frame period and a first reference point of a reference frame according to the reference frame structure;

the base station listens for a first reference signal from a first time instant. In the reference frame structure, the time corresponding to the first time is not earlier than the time corresponding to the first reference point, and the time interval from the first time to the first reference point is less than or equal to a second time length.

The method also includes determining a second reference point from the reference frame structure. The second reference point may be a starting time of the remote base station (corresponding to the second base station) transmitting the first reference signal.

And the base station determines a second time length according to the time interval from the last downlink OFDM symbol to a second reference point in the frame period. The second duration is less than or equal to the first duration; the first time length represents: the time interval from the right boundary of the last downlink OFDM symbol to the second reference point in the frame period. In some application scenarios, the second duration is equal to the first duration minus a preset constant. The preset constant is a time length of 1 or more OFDM symbols, and in short, the preset constant may be a sum of time lengths of an integer number of OFDM symbols. The base station monitors a first reference signal from a first OFDM symbol; the first OFDM symbol is a first OFDM symbol in the reference frame structure, and satisfies the following condition: a time interval from a left boundary of a next one of the OFDM symbols to a first reference point is greater than a second duration. That is, the base station listens for a first reference signal starting from a first OFDM symbol; and the first OFDM symbol is the last OFDM symbol of which the distance from the left boundary to the first reference point in the frame structure is not more than the second duration.

And the base station determines the reference frame structure according to at least one of the preset, network management unit configuration and inter-base station signaling indication.

When the base station determines the reference frame structure through at least one of network management unit configuration and inter-base station signaling indication, the base station receives at least one of the following indication information:

the base station receives first indication information, wherein the first indication information is used for determining a frame period;

the base station receives second indication information, wherein the second indication information is used for determining a first reference point, the second indication information comprises a third time length, and the time interval from the second reference point to a preset boundary of the frame period is equal to the third time length;

the base station receives third indication information, wherein the third indication information is used for determining a second reference point, the third indication information includes a fourth time length, a time interval from the second reference point to the first reference point is equal to the fourth time length, and a time corresponding to the second reference point is not earlier than a time corresponding to the first reference point in the frame period.

And the first base station sends a second reference signal in a time interval [ a second reference point-a sixth time length, a second reference point ], wherein the sixth time length is the time domain length of the second reference signal. The second reference point-sixth time length is the starting time of the time interval, and the second reference point is the ending time of the time interval. The second reference signal herein may be used for detecting a remote base station interference phenomenon.

The first base station determines a sixth time length through presetting; or, the base station receives the fifth indication information and determines a sixth time length; and the fifth indication information is loaded through at least one indication method of network management unit configuration and signaling between base stations.

Example 2:

as shown in fig. 10, it is assumed that three Transmission and reception nodes (TRP) are provided in the network, and TRP1, TRP2, and TRP3 respectively; and the reference frame structures of all three TRPs can be as shown in fig. 10.

In practical applications, when TRP2 finds a DL interference signal from TRP3 in an UL OFDM Symbol (OS), TRP2 sends a reference signal to inform other base stations of interference with its uplink reception of TRP 2. Due to far-end interference, the reference signal transmitted by the victim station (TRP2) needs to pass a period of time before reaching the aggressor station. There is usually some delay, so there is a time difference between the front and back time as shown in fig. 10, and therefore the time difference is aligned in the time domain, and the reference signal sent by TRP2 at the second reference point may reach TRP1 and TRP3 at the first reference point or the time after the first reference point.

As can be seen from fig. 10: since the GP actually employed by TRP1 is large, the DL signal of TRP1 does not interfere with the UL data reception of TRP2, obviously there is no need to start listening from the first reference point, which obviously would result in invalid listening. Therefore, in order to reduce invalid listening in this example, reducing the load and overhead caused by the TRP2 due to invalid listening will start listening after a delay of a certain time after the first reference point, increase the effectiveness of listening, and reduce the load and power consumption caused by unnecessary listening.

The TRP1 starts listening on the xth transmission symbol after the first reference point, the specific starting time for starting listening depends on the UE processing capability, and the UL OS of X4 or 5 listens to the RS and determines the first duration according to X.

Therefore, as can be seen from the flow shown in fig. 10, since there is a large time interval between the DL OS of the TRP1 and the second reference point, the TRP1 does not need to immediately start listening to the RS from the first reference point, and even if the TRP1 starts listening to the RS from the first reference point immediately, the result of starting listening for a certain period of time is meaningless, in this example, listening may start to the uplink transmission symbol after 5 OS intervals after the first reference point, if the reference signal sent by the TRP2 is not listened to at this time, there is no need to perform the interference backoff operation, and if listened to, the corresponding interference backoff operation may be performed according to the duration of the listened reference signal sent by the TRP 2.

Because RS is prevented from being monitored on an irrelevant OS, on one hand, the energy consumption of the base station side can be saved, and on the other hand, the false alarm probability of executing interference rollback by the base station side can be effectively reduced.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all the functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A method for intercepting a reference signal, applied to a first base station, includes:

determining a reference frame structure;

monitoring a first reference signal transmitted by a second base station from the first time; wherein,

the reference frame structure includes at least: a period of a reference frame, a first reference point, and a second reference point; in the reference frame structure, the first time is not earlier than the first reference point, and the time interval from the first time to the first reference point is less than or equal to a first time length, and the first reference point is not earlier than the second reference point; the first duration is less than or equal to a second duration; the second duration is: the time interval from the end time of the last transmission resource of the frame period corresponding to the configuration of the reference frame structure and the downlink time domain transmission resource used when the first base station communicates with the UE to the second reference point;

and determining a first moment according to the period of the reference frame, the first reference point, the second reference point and the downlink time domain transmission resource configuration used when the first base station communicates with the UE.

2. The method of claim 1,

the first reference signal is used for detecting a far-end base station interference phenomenon.

3. The method of claim 1,

the first duration is equal to the second duration minus a preset constant.

4. The method of claim 1,

the listening to the first reference signal transmitted by the second base station from the first time comprises:

5. The method according to any one of claims 1 to 4,

the determining a reference frame structure comprises:

and determining the reference frame structure according to at least one of the presetting, the network management unit configuration or the signaling indication between the base stations.

6. The method of claim 5, wherein the first base station receives at least one of following indication information when determining the reference frame structure through at least one of network management unit configuration and inter-base station signaling indication:

receiving first indication information, wherein the first indication information is used for determining the period of the reference frame;

receiving second indication information, wherein the second indication information is used for determining a second reference point, the second indication information comprises a third duration, and a time interval from the second reference point to a preset boundary of the period of the reference frame is equal to the third duration;

receiving third indication information, wherein the third indication information is used for determining a first reference point, the third indication information comprises a fourth time length, and a time interval from the first reference point to the second reference point is equal to the fourth time length;

7. The method of claim 6,

the time interval between the first moment and the first reference point is less than the fifth duration.

8. The method according to any one of claims 1 to 4, further comprising:

9. The method of claim 8,

the sixth duration is determined by the first base station according to a predetermined specification,

or,

10. A reference signal listening device applied to a first base station comprises:

a first determining module for determining a reference frame structure;

the monitoring module is used for monitoring a first reference signal sent by a second base station from the first moment; wherein,

the second determining module is configured to determine a first time according to the period of the reference frame, the first reference point, the second reference point, and a downlink time domain transmission resource configuration used when the first base station communicates with the UE.

11. A communication device, comprising:

a communication interface for transmitting and receiving information;

a memory for storing information;

a processor, coupled to the communication interface and the memory, respectively, for implementing the method provided by any of claims 1 to 9 by executing computer-executable instructions stored in the memory.

12. A computer storage medium having stored thereon computer-executable instructions; the computer executable instructions, when executed by a processor, implement the method provided in any one of claims 1 to 9.