WO2023184549A1

WO2023184549A1 - Interference suppression method and apparatus, and storage medium

Info

Publication number: WO2023184549A1
Application number: PCT/CN2022/085142
Authority: WO
Inventors: 郭胜祥
Original assignee: 北京小米移动软件有限公司
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2023-10-05
Also published as: CN117178599A

Abstract

Provided in the present disclosure are an interference suppression method and apparatus, and a storage medium. The interference suppression method comprises: determining a first downlink transmit power, wherein the first downlink transmit power is less than a second downlink transmit power, which is used by a base station; and on a downlink frequency-domain resource included in a downlink slot for performing uplink transmission, performing downlink transmission by using the first downlink transmit power. The present disclosure can effectively reduce downlink self-interference from a serving base station and cross-slot interference from a neighbor base station of the serving base station when an enhanced division-duplex terminal performs uplink transmission within a downlink slot, thereby improving the reliability of uplink transmission and improving the feasibility of enhanced division-duplex communications.

Description

Interference suppression method and device, storage medium

Technical field

The present disclosure relates to the field of communications, and in particular, to interference suppression methods and devices, and storage media.

Background technique

In the Rel-18 (Release-18, version 18) duplex enhancement project, the enhanced full-duplex solution will be studied. Specifically, the network side device can send and receive data simultaneously within a slot (time slot). .

Currently, 3GPP (3rd Generation Partnership Project) has determined that Rel-18's full-duplex enhancements are only for gNBs (base stations), while the terminal side still only supports half-duplex. The base station can configure the UL (UpLink, uplink) subband (subband) for uplink data transmission in the DL (DownLink, downlink) slot for the enhanced (Division Duplex, full-duplex) terminal, and in the UL subband The uplink data transmission of the terminal is scheduled within a time-frequency range.

Considering that enhancing the full-duplex capability requires sending uplink transmission within the DL slot, it will receive self-interference from the downlink transmission of this base station and downlink co-channel (co-channel) interference from neighboring base stations. Considering that the downlink transmission power of the base station is relatively high, the resulting cross-slot interference will cause serious interference and greatly affect the uplink transmission performance. There is currently no clear solution on how to suppress self-interference from the serving cell and downlink interference from neighboring cells.

Contents of the invention

In order to overcome problems existing in related technologies, embodiments of the present disclosure provide an interference suppression method and device, and a storage medium.

According to a first aspect of an embodiment of the present disclosure, an interference suppression method is provided, and the method is executed by a base station and includes:

Determine the first downlink transmit power; wherein the first downlink transmit power is less than the second downlink transmit power used by the base station;

The first downlink transmission power is used to perform downlink transmission on the downlink frequency domain resources included in the downlink time slot for uplink transmission.

Optionally, the determining the first downlink transmit power includes:

Based on the agreement, determine the first power backoff value;

Determine the difference between the second downlink transmit power and the first power backoff value as the first downlink transmit power;

The use of the first downlink transmit power for downlink transmission on the downlink frequency domain resources included in the downlink time slot for uplink transmission includes:

Based on the protocol agreement, the first downlink transmit power is used for downlink transmission on each downlink resource block RB included in the downlink time slot.

Optionally, the determining the first downlink transmit power includes:

Based on the protocol agreement, determine different second power backoff values corresponding to different downlink RB intervals;

Determine the difference between the second downlink transmit power and each of the second power backoff values as the first downlink transmit power corresponding to each of the downlink RB intervals;

Based on the protocol agreement, on each downlink RB interval included in the downlink time slot, the first downlink transmit power corresponding to the downlink RB interval is used for downlink transmission.

Optionally, the second power backoff value corresponding to the first downlink RB interval is greater than the second power backoff value corresponding to the second downlink RB interval; wherein the first downlink RB interval is greater than the uplink The distance of frequency domain resources is smaller than the distance of the second downlink RB interval relative to the uplink frequency domain resources.

Optionally, different first downlink transmit powers correspond to different maximum modulation orders, and the first downlink transmit power is positively correlated with the maximum modulation order.

According to a second aspect of the embodiment of the present disclosure, an interference suppression method is provided, and the method is executed by a terminal, including:

Receive the downlink information sent by the base station using the first downlink transmission power on the downlink frequency domain resources included in the downlink time slot for uplink transmission; wherein the first downlink transmission power is smaller than the second downlink transmission power used by the base station. Downlink transmit power.

Optionally, the downlink information sent by the receiving base station using the first downlink transmit power on the downlink frequency domain resources included in the downlink time slot for uplink transmission includes:

Based on the protocol agreement, receive downlink information sent by the base station using the first downlink transmit power on each downlink resource block RB included in the downlink time slot.

Based on the protocol agreement, receive downlink information sent by the base station using the first downlink transmit power corresponding to the downlink RB interval in each downlink RB interval included in the downlink time slot.

Optionally, the second power backoff value corresponding to the first downlink RB interval is greater than the second power backoff value corresponding to the second downlink RB interval; wherein, the first downlink RB interval relative to the uplink frequency domain resource The distance is smaller than the distance between the second downlink RB interval and the uplink frequency domain resource.

According to a third aspect of the embodiment of the present disclosure, an interference suppression device is provided, and the device is applied to a base station and includes:

a determining module configured to determine a first downlink transmit power; wherein the first downlink transmit power is less than the second downlink transmit power used by the base station;

The transmission module is configured to use the first downlink transmit power to perform downlink transmission on the downlink frequency domain resources included in the downlink time slot for uplink transmission.

According to a fourth aspect of the embodiment of the present disclosure, an interference suppression device is provided, and the device is applied to a terminal and includes:

The receiving module is configured to receive downlink information sent by the base station using the first downlink transmit power on the downlink frequency domain resources included in the downlink time slot for uplink transmission; wherein the first downlink transmit power is less than the The second downlink transmit power used by the base station.

According to a fifth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, the storage medium stores a computer program, and the computer program is used to execute any one of the interference suppression methods on the base station side.

According to a sixth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, the storage medium stores a computer program, and the computer program is used to execute any one of the interference suppression methods on the terminal side.

According to a seventh aspect of the embodiment of the present disclosure, an interference suppression device is provided, including:

processor;

Memory used to store instructions executable by the processor;

Wherein, the processor is configured to execute any one of the interference suppression methods described above on the base station side.

According to an eighth aspect of the embodiment of the present disclosure, an interference suppression device is provided, including:

processor;

Memory used to store instructions executable by the processor;

Wherein, the processor is configured to execute any one of the above interference suppression methods on the terminal side.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

In this disclosure, when a full-duplex terminal performs uplink transmission in a downlink time slot, downlink self-interference from the serving base station and cross-time slot interference from neighboring base stations of the serving base station can be effectively reduced, thereby improving the reliability of uplink transmission. Improved feasibility of enhanced full-duplex communications.

It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and do not limit the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

Figure 1 is a schematic diagram of an interference scenario according to an exemplary embodiment.

Figure 2 is a schematic flowchart of an interference suppression method according to an exemplary embodiment.

Figure 3 is a schematic flowchart of another interference suppression method according to an exemplary embodiment.

Figure 4 is a schematic flowchart of another interference suppression method according to an exemplary embodiment.

Figure 5 is a schematic diagram of a power gradient descent mechanism according to an exemplary embodiment.

FIG. 6A is a schematic flowchart of another interference suppression method according to an exemplary embodiment.

Figure 6B is a schematic diagram of a guard band setting according to an exemplary embodiment.

Figure 7 is a schematic flowchart of an interference suppression method according to an exemplary embodiment.

Figure 8 is a schematic flowchart of another interference suppression method according to an exemplary embodiment.

Figure 9 is a schematic flowchart of another interference suppression method according to an exemplary embodiment.

Figure 10 is a schematic flowchart of another interference suppression method according to an exemplary embodiment.

11A to 11C are schematic diagrams of frequency domain resources of DL transmission and UL transmission according to an exemplary embodiment.

Figure 12 is a schematic diagram of a power gradient descent mechanism according to an exemplary embodiment.

Figure 13 is a block diagram of an interference suppression device according to an exemplary embodiment.

Figure 14 is a block diagram of another interference suppression device according to an exemplary embodiment.

FIG. 15 is a schematic structural diagram of an interference suppression device according to an exemplary embodiment of the present disclosure.

FIG. 16 is a schematic structural diagram of another interference suppression device according to an exemplary embodiment of the present disclosure.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the appended claims.

The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "the" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of at least one associated listed item.

It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present disclosure, the first information may also be called second information, and similarly, the second information may also be called first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "when" or "in response to determining."

Duplex mode enhancement is an important part of 3GPP Rel-18 research. Its main idea is to transmit and receive data simultaneously within a time slot. In order to minimize the impact on terminal complexity and radio frequency, the current consensus is to limit the research on duplex mode enhancement to the base station side in the first phase, that is, only support enhanced full duplex on the base station side, for example, Cross Division Duplex. Or xDD.

There are many types of interference in the enhanced full-duplex system, as shown in Figure 1, including:

Self-interference between uplink and downlink transmissions from the base station;

gNB-to-gNB cross-slot interference from other base stations;

UE-to-UE (inter-terminal) cross-slot interference from other terminals;

Among them, the gNB-to-gNB cross-slot interference from other base stations is relatively strong, which will greatly affect the transmission performance of the enhanced full-duplex system.

In the current protocol, UL BWP can only be configured in the UL slot. That is to say, there is no UL BWP configuration in the DL slot. That is to say, there are no following two types of interference in the current system:

Self-interference between uplink and downlink transmissions from base stations; gNB-to-gNB cross-slot interference from other base stations on the same carrier.

In the study of Rel-16 CLI (Cross Link Interference, cross-link interference), 3GPP studied dynamic TDD (Time Division Duplex, time division multiplexing) scenarios. Research shows that even in adjacent scenarios, DL-to-UL cross-slot interference will cause serious performance deterioration in most scenarios, resulting in failure to work properly. However, there is no standardized interference suppression method in the current protocol, and only relevant suggestions for application deployment of dynamic TDD are given. That is to say, there is currently no method for CLI suppression.

In order to solve the above technical problems, the present disclosure provides the following interference suppression method, which can effectively suppress downlink transmission from the serving cell or from neighboring cells in a manner defined by the protocol. For the uplink subband used for uplink transmission in the downlink time slot interference. The interference suppression method provided by this disclosure is first introduced from the base station side.

The first way is for the base station to reduce the downlink transmit power on the downlink frequency domain resources adjacent to the uplink frequency domain resources in the downlink time slot.

An embodiment of the present disclosure provides an interference suppression method. Refer to Figure 2. Figure 2 is a flow chart of an interference suppression method according to an embodiment, which can be executed by a base station. The method can include the following steps:

In step 201, the first downlink transmit power is determined.

Wherein, the first downlink transmission power is less than the second downlink transmission power used by the base station.

In step 202, the first downlink transmission power is used for downlink transmission on the downlink frequency domain resources included in the downlink time slot for uplink transmission.

In the above embodiment, the base station reduces the downlink transmit power on the downlink frequency domain resources adjacent to the uplink frequency domain resources in the downlink time slot, thereby effectively reducing the downlink self-interference from the serving base station and the crossover time from neighboring base stations of the serving base station. Slot interference improves the reliability of uplink transmission and the feasibility of enhancing full-duplex communication.

In some optional embodiments, refer to Figure 3, which is a flow chart of an interference suppression method according to an embodiment, which can be executed by a base station. The method can include the following steps:

In step 301, the first power backoff value is determined based on the protocol agreement.

In this embodiment of the present disclosure, the first power backoff value may be agreed upon by a protocol.

In step 302, the difference between the second downlink transmit power and the first power backoff value is determined as the first downlink transmit power.

In this embodiment of the present disclosure, the difference between the second downlink transmission power used by the base station and the first power backoff value may be determined as the first downlink transmission power.

In step 303, based on the protocol agreement, the first downlink transmit power is used for downlink transmission on each downlink resource block RB included in the downlink time slot.

In the above embodiment, the base station can use the reduced first downlink transmit power on all downlink RBs in the downlink time slot for downlink transmission, thereby effectively reducing downlink self-interference from the serving base station and crossover time from neighboring base stations of the serving base station. Slot interference improves the reliability of uplink transmission and the feasibility of enhancing full-duplex communication.

In some optional embodiments, refer to Figure 4, which is a flow chart of an interference suppression method according to an embodiment, which can be executed by a base station. The method can include the following steps:

In step 401, based on the protocol agreement, different second power backoff values corresponding to different downlink RB intervals are determined.

In the embodiment of the present disclosure, different second power backoff values corresponding to different downlink RB (Resource Block, resource block) intervals can be agreed upon by the protocol. The second power backoff value corresponding to the first downlink RB interval is greater than the second power backoff value corresponding to the second downlink RB interval; wherein, the first downlink RB interval is relative to the uplink frequency domain resource. The distance is smaller than the distance between the second downlink RB interval and the uplink frequency domain resource.

In step 402, the difference between the second downlink transmit power and each of the second power backoff values is determined as the first downlink transmit power corresponding to each of the downlink RB intervals.

In step 403, based on the protocol agreement, on each downlink RB interval included in the downlink time slot, use the first downlink transmission power corresponding to the downlink RB interval for downlink transmission.

In the embodiment of the present disclosure, a power gradient descent base station may be introduced, that is, each downlink RB interval corresponds to a different first downlink transmit power.

Referring to Figure 5, different second power backoff values corresponding to different downlink RB intervals can be agreed upon by agreement, and the second power backoff value corresponding to the first downlink RB interval is greater than the second power backoff value corresponding to the second downlink RB interval. Two power backoff values; wherein the distance between the first downlink RB interval and the uplink frequency domain resource is smaller than the distance between the second downlink RB interval and the uplink frequency domain resource. This allows the base station to use a higher first downlink transmit power for downlink frequency domain resources far away from the uplink subband used for uplink transmission, and use a lower first downlink frequency domain resource closer to the uplink subband. Downlink transmit power for downlink transmission.

It should also be noted that the base station side here adjusts the first downlink transmit power corresponding to different downlink RBs based on the power gradient descent mechanism, which can be applied to the base station of the terminal serving cell. In this way, when the terminal performs downlink reception, what it receives is the base station. Downlink information sent after downlink power control. In addition, it can also be applied to adjacent base stations of the serving cell, thereby reducing cross-slot interference from adjacent base stations.

In a possible implementation, different first downlink transmit powers correspond to different maximum modulation orders, and the first downlink transmit power is positively related to the maximum modulation order.

In the above embodiment, a power gradient descent mechanism is introduced, and the base station can use different reduced first downlink transmit powers for downlink transmission in different downlink RB intervals within the downlink time slot, thereby effectively reducing downlink self-interference from the serving base station. As well as cross-slot interference from neighboring base stations of the serving base station, the reliability of uplink transmission is improved and the feasibility of enhanced full-duplex communication is improved.

The second method is to define a guard band between the uplink frequency domain resources and the downlink frequency domain resources in the downlink time slot.

An embodiment of the present disclosure provides an interference suppression method. Refer to Figure 6A. Figure 6A is a flow chart of an interference suppression method according to an embodiment. It can be executed by a base station. The method can include the following steps:

In step 601, no data is transmitted or received in the guard band within the downlink time slot for uplink transmission.

The guard frequency band is located between the uplink frequency domain resources and the downlink frequency domain resources in the downlink time slot, as shown in Figure 6B. The base station is on this guard band and does not send or receive data.

In a possible implementation, the base station may determine the frequency domain resources occupied by the guard frequency band in the downlink time slot based on a protocol agreement.

In another possible implementation, the base station can configure the frequency domain resources occupied by the guard band based on its own capabilities, and indicate the frequency domain resources occupied by the guard band to the terminal through radio resource control RRC signaling, so that the terminal can use the RRC Signaling instructions determine the corresponding frequency domain resources.

In the above embodiment, a guard band can be set, thereby effectively reducing downlink self-interference from the serving base station and cross-slot interference from neighboring base stations of the serving base station when the full-duplex terminal performs uplink transmission in the downlink time slot, thereby improving uplink transmission. The reliability of transmission improves the feasibility of enhanced full-duplex communication.

It should be noted that the above two methods can be implemented individually or in combination, and this disclosure is not limiting.

Next, the interference suppression method provided by the present disclosure will be introduced from the terminal side.

In the first method, the base station reduces the downlink transmit power on the downlink frequency domain resources adjacent to the uplink frequency domain resources in the downlink time slot.

An embodiment of the present disclosure provides an interference suppression method. Refer to Figure 7. Figure 7 is a flow chart of an interference suppression method according to an embodiment, which can be executed by a terminal. The method can include the following steps:

In step 701, receive downlink information sent by the base station using the first downlink transmit power on the downlink frequency domain resources included in the downlink time slot for uplink transmission.

In this embodiment of the present disclosure, the base station is a serving base station for the terminal, and the first downlink transmission power is smaller than the second downlink transmission power used by the base station. The second downlink transmission power may be the maximum downlink transmission power of the base station.

Of course, the neighboring base stations serving the base station can also reduce the transmit power on the downlink frequency domain resources in the downlink time slot, thereby effectively reducing cross-time slot interference from neighboring base stations.

In the above embodiment, the base station can reduce the transmit power on the downlink frequency domain resource in the downlink time slot, thereby effectively reducing the downlink self-interference from the serving base station and the cross-slot interference from the serving base station's neighboring base stations, and improving the reliability of uplink transmission. performance, improving the feasibility of enhancing full-duplex communication.

In some optional embodiments, refer to Figure 8, which is a flow chart of an interference suppression method according to an embodiment, which can be executed by a terminal. The method can include the following steps:

In step 801, based on the protocol agreement, receive downlink information sent by the base station using the first downlink transmit power on each downlink resource block RB included in the downlink time slot.

In this embodiment of the present disclosure, the base station can determine the first power backoff value according to the protocol agreement, and then use the backoff third power backoff value on each downlink RB included in the downlink time slot for uplink transmission based on the protocol agreement method. The first downlink transmission power is used for downlink transmission. The first downlink transmission power can be the difference between the second downlink transmission power used by the base station and the first power backoff value. The terminal can receive the signal sent by the base station using the first downlink transmission power. downward information.

In some optional embodiments, refer to Figure 9, which is a flow chart of an interference suppression method according to an embodiment, which can be executed by a terminal. The method can include the following steps:

In step 901, based on the protocol agreement, receive the downlink transmitted by the base station using the first downlink transmit power corresponding to the downlink RB interval in each downlink RB interval included in the downlink time slot. information.

In the embodiment of the present disclosure, a power gradient descent mechanism is introduced, that is, each downlink RB interval corresponds to a different first downlink transmit power. Then the base station can, based on the protocol agreement, in each downlink time slot included in the uplink transmission. In the downlink RB interval, the first downlink transmit power corresponding to the downlink RB interval is used to send downlink information, and the terminal can receive it accordingly.

In a possible implementation, the second power backoff value corresponding to the first downlink RB interval is greater than the second power backoff value corresponding to the second downlink RB interval; wherein the first downlink RB interval is smaller than the uplink RB interval. The distance of frequency domain resources is smaller than the distance of the second downlink RB interval relative to the uplink frequency domain resources.

The first downlink transmit power corresponding to the first downlink RB interval may be the difference between the second downlink transmit power used by the base station and the second power backoff value corresponding to the first downlink RB interval. Similarly, the first downlink transmit power corresponding to the second downlink RB interval may be the difference between the second downlink transmit power used by the base station and the second power backoff value corresponding to the second downlink RB interval.

The base station (the base station serving the cell) can define power backoff values corresponding to different downlink RB intervals. Downlink frequency domain resources far away from the uplink subband used for uplink transmission can use higher first downlink transmit power for downlink transmission. Downlink frequency domain resources closer to the uplink subband use lower first downlink transmit power for downlink transmission.

In another possible implementation, different first downlink transmit powers correspond to different maximum modulation orders, and the first downlink transmit power is positively correlated with the maximum modulation order. That is, the greater the first downlink transmit power, the greater the maximum modulation order, and the smaller the first downlink transmit power, the corresponding smaller the maximum modulation order.

In the above embodiment, the base station can use different reduced first downlink transmit powers for downlink transmission in different downlink RB intervals within the downlink time slot, thereby effectively reducing downlink self-interference from the serving base station and neighbor interference from the serving base station. The cross-time slot interference of the base station improves the reliability of uplink transmission and improves the feasibility of enhancing full-duplex communication.

Referring to Figure 10, Figure 10 is a flow chart of an interference suppression method according to an embodiment, which can be executed by a terminal. The method can include the following steps:

In step 1001, no data is expected to be transmitted or received on the guard frequency band within the downlink time slot for uplink transmission.

In this embodiment of the present disclosure, the guard frequency band is located between the uplink frequency domain resources and the downlink frequency domain resources in the downlink time slot, as shown in FIG. 6B. The terminal does not expect to send or receive data in this guard band.

In a possible implementation, the terminal may determine the frequency domain resources occupied by the guard frequency band in the downlink time slot based on the protocol agreement.

In another possible implementation, the terminal may determine the frequency domain resources occupied by the guard frequency band in the downlink time slot based on the indication of RRC signaling sent by the base station. Accordingly, the definition of the guard band is related to the base station capabilities.

In the above embodiment, a guard band can be set, thereby effectively reducing downlink self-interference from the serving base station and cross-slot interference from neighboring base stations of the serving base station when the full-duplex terminal performs uplink transmission in the downlink time slot, thereby improving uplink transmission. The reliability of transmission improves the feasibility of full-duplex communication.

It should be noted that the above two methods can be implemented independently or in combination, and the present disclosure does not limit this.

The interference suppression method provided by the present disclosure is further illustrated below with examples.

Embodiment 1 assumes that the terminal is a Rel-18 or later version terminal with half-duplex capability or enhanced full-duplex capability. This patent does not make any limitations. It is assumed that the base station side performs enhanced full-duplex operation in the downlink time slot of the TDD (Time Division Duplex) frequency band, that is, it schedules downlink data and uplink data at the same time. When the base station side performs enhanced full-duplex operation, it adopts one of the following methods, and this application does not impose any restrictions:

The frequency domain resources used for DL transmission and UL transmission in the DL slot are independent of each other and do not overlap, as shown in Figure 11A;

The frequency domain resources used for DL transmission and UL transmission in the DL slot completely overlap, as shown in Figure 11B;

The frequency domain resources used for DL transmission and UL transmission in the DL slot partially overlap, as shown in Figure 11C, for example.

In this embodiment, it is assumed that the resources used for uplink transmission and the resources used for downlink transmission in the DL slot do not overlap in the frequency domain, for example, as shown in Figure 11A. For terminals that perform uplink transmission on the UL subband, they will suffer from the following two kinds of strong downlink interference: self-interference from the downlink transmission of the own cell; cross-slot interference from the downlink transmission of neighboring cells.

The interference situation can be simplified as SINR=S/(N+I _Self +I _CLI ). Among them, S is the useful signal power, N is the system noise, I _Self is the self-interference of this cell, and I _CLI is the cross-slot interference from neighboring cells. In order to improve the SINR of the useful signal, in this embodiment, the downlink transmit power on the base station side is reduced or limited. Specifically, the base station reduces the transmit power on the DL RB adjacent to the uplink frequency domain resource in the DL slot. In this embodiment, it is assumed that the base station determines in a protocol-predefined manner to reduce the total transmit power on all downlink RBs in the DL slot capable of uplink transmission.

In this embodiment, it is assumed that the maximum downlink transmission power of the base station is 49dBm, that is, the second downlink transmission power is 49dBm. When the base station sends downlink data in the DL slot where UL subband exists, it needs to limit its total downlink transmission power. Specifically, the protocol stipulates that the base station side needs to perform a maximum power backoff of the first power backoff value X dB. In this embodiment, assume X=10. When the base station sends downlink data in the DL slot where UL subband exists, its maximum transmit power is 39dBm.

Embodiment 2 assumes that the terminal is a Rel-18 or later version terminal with half-duplex capability or enhanced full-duplex capability. This patent does not make any limitations. It is assumed that the base station side performs enhanced full-duplex operation in the downlink time slot of the TDD (Time Division Duplex) frequency band, that is, it schedules downlink data and uplink data at the same time. When the base station side performs enhanced full-duplex operation, it adopts one of the following methods, and this application does not impose any restrictions:

The interference situation can be simplified as SINR=S/(N+I _Self +I _CLI ). Among them, S is the useful signal power, N is the system noise, I _Self is the self-interference of this cell, and I _CLI is the cross-slot interference from neighboring cells. In order to improve the SINR of the useful signal, in this embodiment, the downlink transmit power on the base station side is reduced or limited. Specifically, the base station reduces the transmit power on the DL RB adjacent to the uplink frequency domain resource in the DL slot. In this embodiment, it is assumed that a power gradient reduction mechanism is introduced in a predefined manner in the protocol, and power reduction (power reduction) values corresponding to different RB intervals are defined, that is, the second power backoff value. Generally speaking, DL frequency domain resources far away from the UL subband can use higher transmission power for downlink transmission, and DL frequency domain resources close to the UL subband can use lower transmission power for downlink transmission.

In this embodiment, it is assumed that 3 gNB power levels are defined in the DL slot where UL subband exists. Specifically, three power levels can be defined in the following ways, as shown in Figure 12:

Power level 1: power reduction 6dB;

Power level 2: power reduction 3dB;

Power level 3: power reduction 0dB;

This patent does not place any requirements on the number of power levels and the power reduction value corresponding to each power level.

Embodiment 3: As described in Embodiment 2, the different power levels correspond to different modulation order sets. For example, for the above power level #3, it supports up to 256QAM (Quadrature Amplitude Modulation, Quadrature Amplitude Modulation), for Power level #2, it supports up to 64QAM; for Power level #1, it supports up to 16QAM.

When the frequency domain resources of PDSCH transmission scheduled by the base station span multiple power level ranges, the TB can be modulated using different modulation orders at different frequency domain positions.

Embodiment 4 assumes that the terminal is a Rel-18 or later version terminal with half-duplex capability or enhanced full-duplex capability. This patent does not make any limitations. It is assumed that the base station side performs enhanced full-duplex operation in the downlink time slot of the TDD (Time Division Duplex) frequency band, that is, it schedules downlink data and uplink data at the same time. When the base station side performs enhanced full-duplex operation, it adopts one of the following methods, and this application does not impose any restrictions:

The interference situation can be simplified as SINR=S/(N+I _Self +I _CLI ). Among them, S is the useful signal power, N is the system noise, I _Self is the self-interference of this cell, and I _CLI is the cross-slot interference from neighboring cells. In order to improve the SINR of the useful signal and reduce the impact of the above two downlink interferences, this patent defines a guard band between the frequency domain resources used for uplink transmission and the frequency domain resources used for downlink transmission in the DL slot. The guard band is used to isolate frequency leakage from downlink transmission, harmonic interference, and residual interference caused by filter roll-off characteristics. Within the guard band, the base station does not send any downlink channels or downlink signals. Within the guard band, the terminal does not send any uplink channels or uplink signals.

The guard band can be determined in the following ways, and this patent does not impose any restrictions: the guard band is determined in a predefined manner by the protocol; or, the guard band is configured through RRC signaling sent by the base station.

Embodiment 5 is as described in Embodiment 1 to Embodiment 4 above. The method can be applied to the serving base station or to the adjacent base station. This patent does not impose any limitations. The methods described in Examples 1 to 4 above can be used in combination, and this patent does not impose any limitations.

In the above embodiment, when a full-duplex terminal performs uplink transmission in a downlink time slot, downlink self-interference from the serving base station and cross-time slot interference from neighboring base stations of the serving base station can be effectively reduced, thereby improving the reliability of uplink transmission. Improved feasibility of enhanced full-duplex communications.

Corresponding to the foregoing application function implementation method embodiments, the present disclosure also provides an application function implementation device embodiment.

Referring to Figure 13, Figure 13 is a block diagram of an interference suppression device according to an exemplary embodiment. The device is applied to a base station and includes:

The determining module 1301 is configured to determine a first downlink transmit power; wherein the first downlink transmit power is less than the second downlink transmit power used by the base station;

The transmission module 1302 is configured to use the first downlink transmit power to perform downlink transmission on the downlink frequency domain resources included in the downlink time slot for uplink transmission.

Referring to Figure 14, Figure 14 is a block diagram of an interference suppression device according to an exemplary embodiment. The device is applied to a terminal and includes:

The receiving module 1401 is configured to receive downlink information sent by the base station using the first downlink transmit power on the downlink frequency domain resources included in the downlink time slot for uplink transmission; wherein the first downlink transmit power is less than the The second downlink transmit power used by the base station.

As for the device embodiment, since it basically corresponds to the method embodiment, please refer to the partial description of the method embodiment for relevant details. The device embodiments described above are only illustrative. The units described above as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in a place, or can be distributed across multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the disclosed solution. Persons of ordinary skill in the art can understand and implement the method without any creative effort.

Correspondingly, the present disclosure also provides a computer-readable storage medium that stores a computer program, and the computer program is used to execute any of the above interference suppression methods for the base station side.

Correspondingly, the present disclosure also provides a computer-readable storage medium that stores a computer program, and the computer program is used to execute any of the above interference suppression methods for the terminal side.

Correspondingly, the present disclosure also provides an interference suppression device, including:

processor;

Memory used to store instructions executable by the processor;

Wherein, the processor is configured to execute any one of the above interference suppression methods on the base station side.

As shown in Figure 15, Figure 15 is a schematic structural diagram of an interference suppression device 1500 according to an exemplary embodiment. Apparatus 1500 may be provided as a base station. Referring to Figure 15, the apparatus 1500 includes a processing component 1522, a wireless transmit/receive component 1524, an antenna component 1526, and a signal processing portion specific to the wireless interface. The processing component 1522 may further include at least one processor.

One of the processors in the processing component 1522 may be configured to perform any of the interference suppression methods described above.

processor;

Memory used to store instructions executable by the processor;

FIG. 16 is a block diagram of an electronic device 1600 according to an exemplary embodiment. For example, the electronic device 1600 may be a mobile phone, a tablet computer, an e-book reader, a multimedia playback device, a wearable device, a vehicle-mounted terminal, an iPad, a smart TV and other terminals.

16, electronic device 1600 may include one or more of the following components: processing component 1602, memory 1604, power supply component 1606, multimedia component 1608, audio component 1610, input/output (I/O) interface 1612, sensor component 1616, and communications component 1618.

Processing component 1602 generally controls the overall operations of electronic device 1600, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 1602 may include one or more processors 1620 to execute instructions to complete all or part of the steps of the interference suppression method described above. Additionally, processing component 1602 may include one or more modules that facilitate interaction between processing component 1602 and other components. For example, processing component 1602 may include a multimedia module to facilitate interaction between multimedia component 1608 and processing component 1602. As another example, the processing component 1602 can read executable instructions from the memory to implement the steps of an interference suppression method provided by the above embodiments.

Memory 1604 is configured to store various types of data to support operations at electronic device 1600 . Examples of such data include instructions for any application or method operating on electronic device 1600, contact data, phonebook data, messages, pictures, videos, etc. Memory 1604 may be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EEPROM), Programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.

Power supply component 1606 provides power to various components of electronic device 1600 . Power supply components 1606 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic device 1600 .

Multimedia component 1608 includes a display screen that provides an output interface between the electronic device 1600 and the user. In some embodiments, multimedia component 1608 includes a front-facing camera and/or a rear-facing camera. When the electronic device 1600 is in an operating mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each front-facing camera and rear-facing camera can be a fixed optical lens system or have a focal length and optical zoom capabilities.

Audio component 1610 is configured to output and/or input audio signals. For example, audio component 1610 includes a microphone (MIC) configured to receive external audio signals when electronic device 1600 is in operating modes, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 1604 or sent via communication component 1618 . In some embodiments, audio component 1610 also includes a speaker for outputting audio signals.

The I/O interface 1612 provides an interface between the processing component 1602 and a peripheral interface module. The peripheral interface module may be a keyboard, a click wheel, a button, etc. These buttons may include, but are not limited to: Home button, Volume buttons, Start button, and Lock button.

Sensor component 1616 includes one or more sensors for providing various aspects of status assessment for electronic device 1600 . For example, the sensor component 1616 can detect the open/closed state of the electronic device 1600, the relative positioning of components, such as the display and keypad of the electronic device 1600, the sensor component 1616 can also detect the electronic device 1600 or one of the electronic device 1600. The position of components changes, the presence or absence of user contact with the electronic device 1600 , the orientation or acceleration/deceleration of the electronic device 1600 and the temperature of the electronic device 1600 change. Sensor component 1616 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 1616 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 1616 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

Communications component 1618 is configured to facilitate wired or wireless communications between electronic device 1600 and other devices. The electronic device 1600 may access a wireless network based on a communication standard, such as Wi-Fi, 2G, 3G, 4G, 5G or 6G, or a combination thereof. In one exemplary embodiment, communication component 1618 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communications component 1618 also includes a near field communications (NFC) module to facilitate short-range communications. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, electronic device 1600 may be configured by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable A programmable gate array (FPGA), controller, microcontroller, microprocessor or other electronic component implementation is used to perform the above interference suppression method.

In an exemplary embodiment, a non-transitory machine-readable storage medium including instructions, such as a memory 1604 including instructions, which can be executed by the processor 1620 of the electronic device 1600 to complete the above interference suppression method is also provided. For example, the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

Other embodiments of the disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the disclosure that follow the general principles of the disclosure and include common knowledge or customary technical means in the technical field that are not disclosed in the disclosure. . It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the disclosure is limited only by the appended claims.

Claims

An interference suppression method, characterized in that the method is executed by a base station and includes:

Determine the first downlink transmit power; wherein the first downlink transmit power is less than the second downlink transmit power used by the base station;

The first downlink transmission power is used to perform downlink transmission on the downlink frequency domain resources included in the downlink time slot for uplink transmission.
The method according to claim 1, characterized in that determining the first downlink transmit power includes:

Based on the agreement, determine the first power backoff value;

Determine the difference between the second downlink transmit power and the first power backoff value as the first downlink transmit power;

The use of the first downlink transmit power for downlink transmission on the downlink frequency domain resources included in the downlink time slot for uplink transmission includes:

Based on the protocol agreement, the first downlink transmit power is used for downlink transmission on each downlink resource block RB included in the downlink time slot.
The method according to claim 1, characterized in that determining the first downlink transmit power includes:

Based on the protocol agreement, determine different second power backoff values corresponding to different downlink RB intervals;

Determine the difference between the second downlink transmit power and each of the second power backoff values as the first downlink transmit power corresponding to each of the downlink RB intervals;

The use of the first downlink transmit power for downlink transmission on the downlink frequency domain resources included in the downlink time slot for uplink transmission includes:

Based on the protocol agreement, on each downlink RB interval included in the downlink time slot, the first downlink transmit power corresponding to the downlink RB interval is used for downlink transmission.
The method according to claim 3, characterized in that the second power backoff value corresponding to the first downlink RB interval is greater than the second power backoff value corresponding to the second downlink RB interval; wherein, the The distance between the first downlink RB interval and the uplink frequency domain resource is smaller than the distance between the second downlink RB interval and the uplink frequency domain resource.
The method according to claim 3, characterized in that different first downlink transmit powers correspond to different maximum modulation orders, and the first downlink transmit power is positively correlated with the maximum modulation order.
An interference suppression method, characterized in that the method is executed by a terminal and includes:

Receive the downlink information sent by the base station using the first downlink transmission power on the downlink frequency domain resources included in the downlink time slot for uplink transmission; wherein the first downlink transmission power is smaller than the second downlink transmission power used by the base station. Downlink transmit power.
The method according to claim 6, characterized in that the downlink information sent by the receiving base station using the first downlink transmit power on the downlink frequency domain resources included in the downlink time slot for uplink transmission includes:

Based on the protocol agreement, receive downlink information sent by the base station using the first downlink transmit power on each downlink resource block RB included in the downlink time slot.
The method according to claim 6, characterized in that the downlink information sent by the receiving base station using the first downlink transmit power on the downlink frequency domain resources included in the downlink time slot for uplink transmission includes:

Based on the protocol agreement, receive downlink information sent by the base station using the first downlink transmit power corresponding to the downlink RB interval in each downlink RB interval included in the downlink time slot.
The method according to claim 8, characterized in that the second power backoff value corresponding to the first downlink RB interval is greater than the second power backoff value corresponding to the second downlink RB interval; wherein, the first downlink RB interval corresponds to a second power backoff value. The distance between the RB interval and the uplink frequency domain resource is smaller than the distance between the second downlink RB interval and the uplink frequency domain resource.
The method according to claim 8, characterized in that different first downlink transmit powers correspond to different maximum modulation orders, and the first downlink transmit power is positively correlated with the maximum modulation order.
An interference suppression device, characterized in that the device is applied to a base station and includes:

a determining module configured to determine a first downlink transmit power; wherein the first downlink transmit power is less than the second downlink transmit power used by the base station;

The transmission module is configured to use the first downlink transmit power to perform downlink transmission on the downlink frequency domain resources included in the downlink time slot for uplink transmission.
An interference suppression device, characterized in that the device is applied to a terminal and includes:

The receiving module is configured to receive downlink information sent by the base station using the first downlink transmit power on the downlink frequency domain resources included in the downlink time slot for uplink transmission; wherein the first downlink transmit power is less than the The second downlink transmit power used by the base station.
A computer-readable storage medium, characterized in that the storage medium stores a computer program, and the computer program is used to execute the interference suppression method described in any one of claims 1-5.
A computer-readable storage medium, characterized in that the storage medium stores a computer program, and the computer program is used to execute the interference suppression method described in any one of claims 6-10.
An interference suppression device, characterized by including:

processor;

Memory used to store instructions executable by the processor;

Wherein, the processor is configured to execute the interference suppression method according to any one of the above claims 1-5.
An interference suppression device, characterized by including:

processor;

Memory used to store instructions executable by the processor;

Wherein, the processor is configured to perform the interference suppression method according to any one of claims 6-10.