WO2024093741A1

WO2024093741A1 - Communication method, apparatus, system, and storage medium

Info

Publication number: WO2024093741A1
Application number: PCT/CN2023/126284
Authority: WO
Inventors: 焦淑蓉; 花梦; 李军
Original assignee: 华为技术有限公司
Priority date: 2022-11-04
Filing date: 2023-10-24
Publication date: 2024-05-10
Also published as: CN117998642A

Abstract

The present application discloses a communication method, an apparatus, a system, and a storage medium. The method comprises: a network device and a terminal determining a time interval; the network device sending downlink control information to the terminal; and the terminal performing data transmission in a time-domain resource scheduled by the downlink control information, wherein the time-domain resource does not comprise the time interval. Further disclosed are a corresponding apparatus, system and storage medium. By using the solution of the present application, a time interval is determined, and when downlink control information schedules a time-domain resource for carrying out data transmission, the time-domain resource does not comprise the time interval, such that the design requirements of an SBFD system can be met, and the communication reliability is improved.

Description

Communication method, device, system and storage medium

This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on November 4, 2022, with application number 202211389756.0 and invention name “Communication Method, Device, System and Storage Medium”, all contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the field of communication technology, and in particular to a communication method, device, system and storage medium.

Background technique

Subband full duplex (SBFD) technology can increase uplink coverage, reduce uplink transmission delay, and improve uplink transmission performance. However, it is stipulated that in the SBFD time slot (or symbol), downlink transmission can only occur outside the uplink (UL) subband, while in the traditional downlink (DL) time slot (or symbol), the bandwidth of the downlink transmission is the bandwidth of the DL part bandwidth (BWP). For the terminal that performs downlink reception in the SBFD time slot (or symbol), if the receiving filter with the bandwidth of DL BWP is still used, the uplink interference signal on the uplink subband (UL subband) will be received together. If the interfering terminal that is performing uplink transmission is very close to the terminal, that is, the power of the uplink interference signal is very large, it will cause a large proportion of interference in the received signal, which will not only introduce interference but also affect the gear position of the automatic gain control (AGC).

In addition, if the bandwidth used for downlink transmission in the SBFD time slot (or symbol) is significantly different from the bandwidth of the DL BWP, then using a receiving filter with a bandwidth equal to the DL BWP all the time in the SBFD time slot will also increase unnecessary power consumption.

Therefore, in the SBFD time slot (or symbol), if reception can be achieved only on the bandwidth outside the UL subband, the reception performance can be improved and the power consumption can be reduced.

Similarly, in the SBFD time slot (or symbol), if it is possible to transmit only on the bandwidth outside the downlink subband (DL subband), the transmission performance can be improved and the power consumption can be reduced.

However, it takes time for the terminal to switch the filter bandwidth. From the moment the network device notifies the terminal of the downlink/uplink bandwidth to the moment the filter bandwidth switching is completed, a certain time interval is required. In the SBFD system, how to set a suitable time interval to meet the design requirements of the SBFD system and improve the reliability of communication is a problem that needs to be solved in this application.

Summary of the invention

The present application provides a communication method, device, system and storage medium to determine the time interval, meet the design requirements of the SBFD system, and improve the reliability of communication.

In a first aspect, a communication method is provided, the method comprising: a terminal determining a time interval; the terminal receiving downlink control information (DCI); and the terminal performing data transmission within a time domain resource scheduled by the DCI, wherein the time domain resource does not include the time interval; wherein the position of the time interval comprises at least one of the following: the time interval is within a sub-band full-duplex time unit; the time interval is within an uplink time unit; the time interval is within a downlink time unit; the time interval is within a time unit before a first time; the time interval is within a time unit after a first time; wherein the first time is a boundary between the downlink time unit and a sub-band full-duplex unit adjacent to the downlink time unit, or the first time is a boundary between the uplink time unit and a sub-band full-duplex unit adjacent to the uplink time unit.

In this aspect, for the SBFD system, a certain time interval is required for data transmission on sub-bands of different bandwidth sizes. The terminal determines the time interval, and when the downlink control information is scheduling time domain resources for data transmission, the time domain resources do not include the time interval, thereby meeting the design requirements of the SBFD system and improving the reliability of communication.

In addition, the terminal can switch the receiving bandwidth and the transmitting bandwidth within the time interval, and use the appropriate bandwidth for signal transmission on the SBFD time unit, which reduces interference and improves performance. At the same time, since data transmission is impossible during the switching process, and the time domain resources for data transmission do not include the time interval, it can ensure that data transmission is not affected by the switching process.

In a possible implementation, the method further includes: the terminal switches the bandwidth size of the filter within the time interval. The filter includes a transmitting filter and a receiving filter. The receiving filter is used to receive radio frequency signals within the bandwidth and filter out radio frequency signals outside the bandwidth; the transmitting filter is used to send radio frequency signals within the bandwidth and filter out radio frequency signals outside the bandwidth. The bandwidth here refers to the transmission bandwidth corresponding to the radio frequency transmission.

In this implementation, by setting a time interval, the terminal can switch the bandwidth size of the filter within the time interval, thereby reducing interference. It also saves power consumption of terminal equipment and improves system performance.

In another possible implementation, the terminal determines the time interval, including: the terminal receives time division duplex parameters and sub-band full-duplex parameters; and the terminal determines the time interval based on the time division duplex parameters and the sub-band full-duplex parameters; wherein the time division duplex parameters include at least one of the following parameters: a time slot index of a downlink time slot, a time slot index of an uplink time slot, a time slot index of a flexible time slot, and a symbol index of at least one symbol among an uplink symbol, a downlink symbol, and a flexible symbol in the flexible time slot; the sub-band full-duplex parameters include at least one of the following parameters: a sub-band full-duplex time unit index, and a sub-band position in a sub-band full-duplex time unit.

In yet another possible implementation, the position of the time interval is preset by a protocol.

In yet another possible implementation, the method further includes: the terminal receiving first information, where the first information includes a position of the time interval.

In yet another possible implementation, the method further includes: the terminal sending capability information, where the capability information includes indication information of a capability of supporting configuration of the time interval in a sub-band full-duplex system.

In this implementation, SBFD technology is a newly introduced technology in NR. Some terminals may support SBFD, while others may not. For terminals that support SBFD, in order to allow the terminal to switch the bandwidth size of the filter in time, the terminal should have the ability to support the configuration of the time interval in the SBFD system, and the terminal can make the network device aware of the terminal's capabilities, so that the network device will schedule transmission and/or time interval configuration according to the terminal's capabilities.

In yet another possible implementation, the capability information further includes a minimum length of the time interval; or the length of the time interval is preset by a protocol.

In this implementation, if the network device receives the above-mentioned capability information sent by the terminal, and the capability information includes the length of the time interval, the length of the time interval configured by the network device may be greater than or equal to the minimum length of the time interval reported by the terminal, so that the terminal can switch the filter bandwidth in time. The length of the time interval may also be preset by the protocol.

In yet another possible implementation, one or more symbols of the sub-band full-duplex time unit are symbols used for interference and/or channel quality measurement, and the time interval is located before the symbols used for interference and/or channel quality measurement.

In another possible implementation, there are two non-adjacent sub-bands with the same transmission direction on the sub-band full-duplex time unit, one of the two non-adjacent sub-bands is protocol preset or network configured, and the frequency domain resources scheduled by the DCI include part or all of the frequency domain resources of one of the sub-bands.

In this implementation, for two non-adjacent sub-bands with the same transmission direction on the sub-band full-duplex time unit, the frequency domain resources scheduled by DCI include part or all of the frequency domain resources of one of the sub-bands to comply with the scheduling rules, meet the design requirements of the SBFD system, and improve the reliability of communication.

In another possible implementation, there are two non-adjacent sub-bands with the same transmission direction on the sub-band full-duplex time unit, and the frequency domain resources scheduled by the DCI include part or all of the frequency domain resources of a target sub-band, and the target sub-band is one of the two non-adjacent sub-bands; wherein the target sub-band changes with the sub-band full-duplex time unit; or the target sub-band changes in units of continuous sub-band full-duplex time units.

In this implementation, the target subband can be flexibly changed.

In another possible implementation, when the default scheduling rule is the first scheduling rule, and the DCI schedules time domain resources according to the second scheduling rule, the distance between the position of the DCI and the position of the time domain resources scheduled by the DCI is greater than a first time threshold, and the first time threshold is a positive number; and/or when the default scheduling rule is the second scheduling rule, and the DCI schedules time domain resources according to the first scheduling rule, the distance between the position of the DCI and the position of the time domain resources scheduled by the DCI is greater than a second time threshold, and the second time threshold is a positive number; and/or the first DCI schedules the transmission of first data according to the first scheduling rule, and the second DCI schedules the transmission of second data according to the second scheduling rule, and the distance between the transmission position of the first data and the transmission position of the second data is greater than a third time threshold, and the third time threshold is a positive number; wherein the first scheduling rule is transmission across two subbands, and the second scheduling rule is transmission within one of two non-adjacent subbands.

In this implementation, by setting the above time threshold, the terminal has enough time to switch the bandwidth size of the filter for transmissions with different bandwidth sizes.

In another possible implementation, there are two non-adjacent sub-bands with the same transmission direction on the sub-band full-duplex time unit, and the frequency domain resources scheduled by the DCI include the two non-adjacent sub-bands. The method also includes: the terminal transmits data in the two non-adjacent sub-bands according to the DCI and starts a timer; and if there is no new data transmission during the operation of the timer, when the timer stops, the terminal monitors data in one of the two non-adjacent sub-bands.

In this implementation, when there is no new data transmission for a period of time, the terminal monitors data in one of two non-adjacent sub-bands, that is, the terminal uses a smaller filter bandwidth, which is conducive to saving power consumption of the terminal.

In another possible implementation, the number of subbands included in the frequency domain resources for data transmission scheduled by the DCI in the subband full-duplex time unit is associated with the number of subbands corresponding to the search space set where the DCI is located, thereby simplifying the configuration of the communication system.

In another possible implementation, the number of subbands included in the frequency domain resources for data transmission scheduled by the DCI in the subband full-duplex time unit is associated with the number of subbands corresponding to the control resource set where the DCI is located, thereby simplifying the configuration of the communication system.

In a second aspect, a communication method is provided, the method comprising: a network device determines a time interval; the network device sends a DCI; and the network device performs data transmission within a time domain resource scheduled by the DCI, wherein the time domain resource does not include the time interval; wherein the position of the time interval comprises at least one of the following: the time interval is within a sub-band full-duplex time unit; the time interval is within an uplink time unit; the time interval is within a downlink time unit; the time interval is within a time unit before a first time; the time interval is within a time unit after a first time; wherein the first time is a boundary between the downlink time unit and a sub-band full-duplex unit adjacent to the downlink time unit, or the first time is a boundary between the uplink time unit and a sub-band full-duplex unit adjacent to the uplink time unit.

In this aspect, for the SBFD system, a certain time interval is required for data transmission on sub-bands of different bandwidth sizes. The network equipment determines the time interval, and when the downlink control information schedules time domain resources for data transmission, the time domain resources do not include the time interval, thereby meeting the design requirements of the SBFD system and improving the reliability of communication.

In one possible implementation, the network device determines the time interval, including: the network device sends a time division duplex parameter and a sub-band full-duplex parameter; and the network device determines the time interval based on the time division duplex parameter and the sub-band full-duplex parameter; wherein the time division duplex parameter includes at least one of the following parameters: a time slot index of a downlink time slot, a time slot index of an uplink time slot, a time slot index of a flexible time slot, and a symbol index of at least one symbol among an uplink symbol, a downlink symbol, and a flexible symbol in the flexible time slot; the sub-band full-duplex parameter includes at least one of the following parameters: a sub-band full-duplex time unit index, and a sub-band position in a sub-band full-duplex time unit.

In another possible implementation, the position of the time interval is preset by a protocol.

In yet another possible implementation, the method further includes: the network device sending first information, where the first information includes the position of the time interval.

In yet another possible implementation, the method further includes: the network device receiving capability information, where the capability information includes indication information of a capability of supporting configuration of the time interval in a sub-band full-duplex system.

In another possible implementation, the number of subbands included in the frequency domain resources for data transmission scheduled by the DCI within the subband full-duplex time unit is associated with the number of subbands corresponding to the search space set where the DCI is located.

In another possible implementation, the number of subbands included in the frequency domain resources for data transmission scheduled by the DCI within the subband full-duplex time unit is associated with the number of subbands corresponding to the control resource set where the DCI is located.

In a third aspect, a communication device is provided, which can implement the communication method in the first aspect. For example, the communication device can be a terminal or a chip system of a terminal. The method can be implemented by software, hardware, or by hardware executing corresponding software.

In one possible implementation, the communication device includes a transceiver unit and a processing unit, wherein the processing unit is used to determine a time interval; the transceiver unit is used to receive DCI; and the transceiver unit is also used to transmit data within the time domain resources scheduled by the DCI, wherein the time domain resources do not include the time interval; wherein the position of the time interval includes at least one of the following: the time interval is located within a sub-band full-duplex time unit; the time interval is located within an uplink time unit; the time interval is located within a downlink time unit; the time interval is located within a time unit before a first time; the time interval is located within a time unit after a first time; wherein the first time is the boundary between the downlink time unit and a sub-band full-duplex unit adjacent to the downlink time unit, or the first time is the boundary between the uplink time unit and a sub-band full-duplex unit adjacent to the uplink time unit.

Optionally, the processing unit is further configured to switch the bandwidth of the filter within the time interval.

Optionally, the transceiver unit is also used to receive time division duplex parameters and sub-band full-duplex parameters; and the processing unit is also used to determine the time interval based on the time division duplex parameters and the sub-band full-duplex parameters; wherein the time division duplex parameters include at least one of the following parameters: a time slot index of a downlink time slot, a time slot index of an uplink time slot, a time slot index of a flexible time slot, and a symbol index of at least one symbol among the uplink symbol, the downlink symbol, and the flexible symbol in the flexible time slot; and the sub-band full-duplex parameters include at least one of the following parameters: a sub-band full-duplex time unit index, and a sub-band position in a sub-band full-duplex time unit.

Optionally, the position of the time interval is preset by the protocol.

Optionally, the transceiver unit is further used to receive first information, where the first information includes the position of the time interval.

Optionally, the transceiver unit is further used to send capability information, where the capability information includes indication information of the capability of supporting configuration of the time interval in a sub-band full-duplex system.

Optionally, the capability information further includes a minimum length of the time interval; or the length of the time interval is preset by a protocol.

Optionally, one or more symbols of the sub-band full-duplex time unit are symbols used for interference and/or channel quality measurement, and the time interval is located before the symbols used for interference and/or channel quality measurement.

Optionally, there are two non-adjacent sub-bands with the same transmission direction on the sub-band full-duplex time unit, one of the two non-adjacent sub-bands is preset by the protocol or configured by the network, and the frequency domain resources scheduled by the DCI include part or all of the frequency domain resources of one of the sub-bands.

Optionally, there are two non-adjacent sub-bands with the same transmission direction on the sub-band full-duplex time unit, and the frequency domain resources scheduled by the DCI include part or all of the frequency domain resources of a target sub-band, and the target sub-band is one of the two non-adjacent sub-bands; wherein the target sub-band changes with the sub-band full-duplex time unit; or the target sub-band changes in units of continuous sub-band full-duplex time units.

Optionally, when the default scheduling rule is the first scheduling rule, and the DCI schedules time domain resources according to the second scheduling rule, the time difference between the position of the DCI and the position of the time domain resources scheduled by the DCI is greater than a first time threshold, and the first time threshold is a positive number; and/or when the default scheduling rule is the second scheduling rule, and the DCI schedules time domain resources according to the first scheduling rule, the time difference between the position of the DCI and the position of the time domain resources scheduled by the DCI is greater than a second time threshold, and the second time threshold is a positive number; and/or the first DCI schedules the transmission of first data according to the first scheduling rule, and the second DCI schedules the transmission of second data according to the second scheduling rule, and the time difference between the transmission position of the first data and the transmission position of the second data is greater than a third time threshold, and the third time threshold is a positive number; wherein, the first scheduling rule is transmission across two subbands, and the second scheduling rule is transmission within one of two non-adjacent subbands.

Optionally, there are two non-adjacent sub-bands with the same transmission direction on the sub-band full-duplex time unit, the frequency domain resources scheduled by the DCI include the two non-adjacent sub-bands, and the transceiver unit is further used to transmit data in the two non-adjacent sub-bands according to the DCI; the processing unit is further used to start a timer; and the transceiver unit is further used to monitor data in one of the two non-adjacent sub-bands when the timer stops if there is no new data transmission during the operation of the timer.

Optionally, the number of subbands included in the frequency domain resources for data transmission scheduled by the DCI within the subband full-duplex time unit is associated with the number of subbands corresponding to the search space set where the DCI is located.

Optionally, the number of subbands included in the frequency domain resources for data transmission scheduled by the DCI within the subband full-duplex time unit is associated with the number of subbands corresponding to the control resource set where the DCI is located.

In a fourth aspect, a communication device is provided, which can implement the communication method in the second aspect. For example, the communication device can be a network device or a chip system in a network device. The above method can be implemented by software, hardware, or by hardware executing corresponding software.

In a possible implementation, the communication device includes a transceiver unit and a processing unit; wherein the processing unit is used to determine a time interval; the transceiver unit is used to send a DCI; and the transceiver unit is further used to perform data transmission within a time domain resource scheduled by the DCI, wherein the time domain resource does not include the time interval; wherein the position of the time interval includes at least one of the following: the time interval is located within a sub-band full-duplex time unit; the time interval is located within an uplink time unit; the time interval is located within a downlink time unit unit; the time interval is within the time unit before the first time; the time interval is within the time unit after the first time; wherein the first time is the boundary between the downlink time unit and the sub-band full-duplex unit adjacent to the downlink time unit, or the first time is the boundary between the uplink time unit and the sub-band full-duplex unit adjacent to the uplink time unit.

Optionally, the transceiver unit is also used to send time division duplex parameters and sub-band full-duplex parameters; and the processing unit is also used to determine the time interval based on the time division duplex parameters and the sub-band full-duplex parameters; wherein the time division duplex parameters include at least one of the following parameters: a time slot index of a downlink time slot, a time slot index of an uplink time slot, a time slot index of a flexible time slot, and a symbol index of at least one symbol among the uplink symbol, the downlink symbol, and the flexible symbol in the flexible time slot; the sub-band full-duplex parameters include at least one of the following parameters: a sub-band full-duplex time unit index, and a sub-band position in a sub-band full-duplex time unit.

Optionally, the position of the time interval is preset by the protocol.

Optionally, the transceiver unit is further used to send first information, where the first information includes the position of the time interval.

Optionally, the transceiver unit is further used to receive capability information, where the capability information includes indication information of the capability of supporting configuration of the time interval in a sub-band full-duplex system.

In combination with the third aspect or the fourth aspect, in another possible implementation, the communication device in the third aspect or the fourth aspect includes a processor coupled to a memory; the processor is configured to support the device to perform corresponding functions in the above communication method. The memory is used to couple with the processor, which stores the necessary programs (instructions) and/or data of the device. Optionally, the communication device may also include a communication interface for supporting communication between the device and other network elements. Optionally, the memory may be located inside the communication device or outside the communication device.

In combination with the third aspect or the fourth aspect, in another possible implementation, the communication device in the third aspect or the fourth aspect includes a processor and a transceiver, the processor is coupled to the transceiver, and the processor is used to execute a computer program or instruction to control the transceiver to receive and send information; when the processor executes the computer program or instruction, the processor is also used to implement the above method through a logic circuit or execute code instructions. The transceiver may be a transceiver, a transceiver circuit, or an input-output interface, which is used to receive signals from other devices outside the communication device and transmit them to the processor or send signals from the processor to other devices outside the communication device. When the communication device is a chip, the transceiver is a transceiver circuit or an input-output interface.

When the communication device in the third aspect or the fourth aspect is a chip or a chip module, the sending unit may be an output unit, such as an output circuit or a communication interface; the receiving unit may be an input unit, such as an input circuit or a communication interface. When the communication device is a terminal or an access network device, the sending unit may be a transmitter or a transmitter; the receiving unit may be a receiver or a receiver.

In a fifth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program or an instruction. When a computer executes the computer program or instruction, the methods described in the above aspects are implemented.

According to a sixth aspect, a computer program product comprising instructions is provided. When the instructions are executed on a communication device, the communication device executes the methods described in the above aspects.

In a seventh aspect, a communication system is provided, which includes the communication device of the third aspect and the communication device of the fourth aspect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application;

FIG2a is a schematic diagram of a frequency division duplex provided in an embodiment of the present application;

FIG2b is a schematic diagram of a time division duplex provided in an embodiment of the present application;

FIG2c is a schematic diagram of a sub-band full-duplex provided in an embodiment of the present application;

FIG3 is a flow chart of a communication method provided in an embodiment of the present application;

FIG4a is a schematic diagram of an SBFD sub-band provided in an embodiment of the present application;

FIG4b is a schematic diagram of another SBFD sub-band provided in an embodiment of the present application;

FIG5a is a schematic diagram of the position of a time interval provided in an embodiment of the present application;

FIG5b is a schematic diagram of another position of a time interval provided in an embodiment of the present application;

FIG5c is a schematic diagram of the position of another time interval provided in an embodiment of the present application;

FIG5d is a schematic diagram of the position of another time interval provided in an embodiment of the present application;

FIG6 is a schematic diagram of the position of another time interval provided in an embodiment of the present application;

FIG7 is a schematic diagram of a search space set provided in an embodiment of the present application;

FIG8a is a schematic diagram of frequency domain resources for DCI scheduling provided in an embodiment of the present application;

FIG8b is a schematic diagram of another frequency domain resource for DCI scheduling provided in an embodiment of the present application;

FIG8c is a schematic diagram of frequency domain resources for another DCI scheduling provided in an embodiment of the present application;

FIG9 is a schematic diagram of transmission scheduling in an SBFD system provided in an embodiment of the present application;

FIG10 is a schematic diagram of transmission scheduling in another SBFD system provided in an embodiment of the present application;

FIG11 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

FIG. 12 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application.

Detailed ways

The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

The embodiments of the present application can be applied to various communication systems, such as: long term evolution (LTE) system LTE time division duplex (TDD), ^fifth generation (5G) communication system and future ^sixth generation (6G) communication system, etc.

FIG1 is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application. As shown in FIG1 , the communication system includes a wireless access network 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. Among them, the wireless access network 100 may include at least one wireless access network device (such as 110a and 110b in FIG1 ), and may also include at least one terminal (such as 120a-120j in FIG1 ). The terminal is connected to the wireless access network device by wireless means, and the wireless access network device is connected to the core network by wireless or wired means. The core network device and the wireless access network device may be independent and different physical devices, or the functions of the core network device and the logical functions of the wireless access network device may be integrated on the same physical device, or the functions of some core network devices and some wireless access network devices may be integrated on one physical device. Terminals and terminals and wireless access network devices may be connected to each other by wire or wireless means. FIG1 is only a schematic diagram, and the communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG1 .

The wireless access network device may be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a fifth generation (5G) mobile communication system, a next generation NodeB in a sixth generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc.; it may also be a module or unit that completes part of the functions of a base station, for example, a centralized unit (CU) or a distributed unit (DU). The wireless access network device may be a macro base station (such as 110a in FIG. 1), a micro base station or an indoor station (such as 110b in FIG. 1), or a relay node or a donor node, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network device. For ease of description, the following description takes a base station as an example of a wireless access network device.

The terminal may also be referred to as terminal equipment, user equipment (UE), mobile station, mobile terminal, etc. The terminal can be widely used Used in various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal.

Base stations and terminals can be fixed or movable. Base stations and terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons, and artificial satellites in the air. The embodiments of this application do not limit the application scenarios of base stations and terminals.

The roles of the base station and the terminal can be relative. For example, the helicopter or drone 120i in FIG. 1 can be configured as a mobile base station. For the terminal 120j that accesses the wireless access network 100 through 120i, the terminal 120i is a base station; but for the base station 110a, 120i is a terminal, that is, 110a and 120i communicate through the wireless air interface protocol. Of course, 110a and 120i can also communicate through the interface protocol between base stations. In this case, relative to 110a, 120i is also a base station. Therefore, base stations and terminals can be collectively referred to as communication devices. 110a and 110b in FIG. 1 can be referred to as communication devices with base station functions, and 120a-120j in FIG. 1 can be referred to as communication devices with terminal functions.

Base stations and terminals, base stations and base stations, and terminals and terminals can communicate through authorized spectrum, unauthorized spectrum, or both; they can communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

In the embodiments of the present application, the functions of the base station may also be performed by a module (such as a chip) in the base station, or by a control subsystem including the base station function. The control subsystem including the base station function here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, smart city, etc. The functions of the terminal may also be performed by a module (such as a chip or a modem) in the terminal, or by a device including the terminal function.

In this application, the base station sends a downlink signal or downlink information to the terminal, and the downlink information is carried on the downlink channel; the terminal sends an uplink signal or uplink information to the base station, and the uplink information is carried on the uplink channel. In order to communicate with the base station, the terminal establishes a wireless connection with the cell controlled by the base station. The cell with which the terminal has established a wireless connection is called the service cell of the terminal. When the terminal communicates with the service cell, it will also be interfered by signals from neighboring cells.

In the embodiments of the present application, the time domain symbol may be an orthogonal frequency division multiplexing (OFDM) symbol or a discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol. If not otherwise specified, the symbols in the embodiments of the present application refer to time domain symbols.

It can be understood that in the embodiments of the present application, PDSCH, PDCCH and PUSCH are merely examples of downlink data channels, downlink control channels and uplink data channels, respectively. In different systems and different scenarios, data channels and control channels may have different names, and the embodiments of the present application do not limit this.

The following is an introduction to several duplex modes that may be involved in the embodiments of the present application:

Currently, there are two duplexing modes in new radio (NR): frequency division duplex (FDD) and time division duplex (TDD).

Among them, as shown in Figure 2a, it is a schematic diagram of a frequency division duplex provided in an embodiment of the present application. In time slot 0, downlink transmission can be performed on the DL BWP, and uplink transmission can be performed on the UL BWP of time slot 0. The DL BWP and the UL BWP are located on different carriers and are separated in the frequency domain.

As shown in FIG. 2b, a schematic diagram of a time division duplex provided in an embodiment of the present application is shown. The central frequency of the DL BWP and the UL BWP is the same, and the bandwidth of the DL BWP and the UL BWP can be the same or different. At the same time, the terminal can only perform uplink or downlink transmission. For example, in slot 0, only downlink transmission can be performed; in slot 4, only uplink transmission can be performed; slot 3 is a flexible time slot, that is, it can be used for uplink transmission or downlink transmission, but not uplink and downlink transmission at the same time. The minimum granularity of uplink and downlink transmission switching is a symbol. For example, slot 3 is a flexible time slot, which consists of 14 or 12 OFDM symbols, of which the first M symbols are downlink symbols, the last N symbols are uplink symbols, and the middle 14-M-N (or 12-M-N) symbols are flexible symbols, 0<=M<=14 (or 12), 0<=N<=14 (or 12), M+N<=14 (or 12). Downlink symbols are used for downlink transmission, and uplink symbols are used for uplink transmission. Flexible symbols can be used for both uplink and downlink. The specific transmission direction is notified to the terminal by the network equipment through radio resource control (RRC) signaling or downlink control information (DCI) scheduling.

Compared with FDD, TDD occupies less frequency domain resources. However, in TDD, uplink and downlink transmission cannot be performed simultaneously. For example, slot 0 can only perform downlink transmission but not uplink transmission, which will increase the uplink transmission delay. On the other hand, the number of consecutive uplink time slots is Limited, will also lead to limited uplink coverage.

In order to solve the delay problem of TDD, flexible duplex is being discussed in the standard, which can be understood as complementary TDD (C-TDD), or full duplex (Full duplex). There are other names, for example, subband full duplex (SBFD) is currently discussed more. The core idea is that uplink and downlink transmission resources can be configured at the same time on a certain symbol or time slot of the TDD system. For example, as shown in Figure 2c, a schematic diagram of a subband full duplex provided in an embodiment of the present application is provided. In a time slot such as slot 0, there is a frequency domain resource in the downlink BWP, and uplink transmission can be performed on the frequency domain resource. In this way, uplink transmission can be performed on slot 0, which reduces the delay of uplink transmission. This frequency domain resource is usually called an uplink subband. At this time, downlink transmission can also be performed on slot 0. The network device can perform uplink and downlink transmissions simultaneously on slot 0. The terminal can also perform uplink and downlink transmissions simultaneously in slot 0 (i.e., full-duplex terminal). At the same time, the terminal can also perform only uplink or downlink transmissions (half-duplex terminal). Compared with TDD, SBFD has more uplink resources, which can reduce uplink transmission delay and increase uplink coverage. For example, in different symbols of the same time slot, some symbols are only used for downlink transmission, and some symbols have both downlink frequency domain resources and uplink frequency domain resources.

Similarly, there may be a section of frequency domain resources within the uplink BWP, on which downlink transmission can be performed. This section of frequency domain resources is usually called a downlink subband.

The current standard supports network devices to notify terminals of the time-frequency domain resource information of SBFD subbands, and terminals supporting SBFD can use this information to optimize their transmission behavior and improve performance.

For terminals supporting SBFD, assuming that UL subbands are configured on SBFD symbols, the SBFD system design also has the following options:

Option 1: The SBFD-supporting terminal does not expect to be scheduled by the network device to perform uplink transmission outside the UL sub-band on the SBFD symbol, or does not expect to be scheduled by the network device to perform downlink transmission within the UL sub-band;

Option 2: The SBFD-supporting terminal does not expect to be scheduled by the network device to perform uplink transmission outside the UL sub-band on the SBFD symbol, and can be scheduled by the network device to perform downlink transmission within the UL sub-band;

Option 3: A terminal supporting SBFD can be scheduled by a network device to perform uplink transmission outside the UL sub-band on a SBFD symbol, and is not expected to be scheduled by the network device to perform downlink transmission within the UL sub-band;

Option 4: A terminal supporting SBFD may be scheduled by a network device to perform uplink transmission outside the UL sub-band on a SBFD symbol, or may be scheduled by a network device to perform downlink transmission within the UL sub-band.

The above options can be summarized in Table 1:

Table 1

For the terminals in Option 1 and Option 3 above, in the SBFD time slot, downlink transmission can only occur outside the UL subband, while in the traditional DL time slot, the bandwidth of the downlink transmission is the bandwidth of the DL BWP. For the terminal that performs downlink reception in the SBFD time slot, if the receiving filter with the bandwidth of the DL BWP is still used, the uplink interference signal on the uplink subband will be received together. If the interfering terminal that is performing uplink transmission is very close to the terminal, that is, the power of the uplink interference signal is very large, it will cause a large proportion of interference in the received signal, which will not only introduce interference but also affect the gear position of the AGC.

In addition, if the bandwidth used for downlink transmission in the SBFD time slot is significantly different from the bandwidth of the DL BWP, then always using a receiving filter with a bandwidth equal to the DL BWP in the SBFD time slot will also increase unnecessary power consumption.

Therefore, in the SBFD timeslot, if reception can be achieved only on bandwidth outside the UL subband, the reception performance can be improved and power consumption can be reduced.

Similarly, assuming that a DL subband is configured on the SBFD symbol, uplink transmission can only occur outside the DL subband in the SBFD time slot. In the SBFD time slot, if it is possible to transmit only on the bandwidth outside the downlink subband, the transmission performance can be improved and the power consumption can be reduced.

It takes time for the terminal to switch the filter bandwidth. A certain time interval is required from the moment the network device notifies the terminal of the downlink/uplink bandwidth to the moment the filter bandwidth switching is completed. For example, several symbols are required from the moment the network device notifies the terminal of the downlink/uplink bandwidth to the moment the filter bandwidth switching is completed. Among them, there are two ways for the network device to notify the terminal of the downlink/uplink bandwidth: one is the RRC signaling configuration, which can be regarded as a semi-static configuration scheme with slow changes, which is equivalent to the terminal knowing the change of the downlink bandwidth some time in advance. At this time, the number of symbols required for the filter bandwidth switching is relatively small; the other is the dynamic DCI notification, which can be regarded as a dynamic and fast notification. The terminal can first receive the DCI and parse out the information about the downlink/uplink bandwidth, and use it to guide the switching of the filter bandwidth. At this time, the number of symbols required for the filter bandwidth switching is relatively large.

Therefore, in the SBFD system, a suitable time interval can be set.

There is currently no corresponding solution.

In view of this, the present application provides a communication solution. For the SBFD system, a certain time interval is required for data transmission on sub-bands of different bandwidth sizes. The terminal and the network device determine the time interval. When the DCI schedules time domain resources for data transmission, the time domain resources do not include the time interval, thereby meeting the design requirements of the SBFD system and improving the reliability of communication.

As shown in Figure 3, it is a flow chart of a communication method provided in an embodiment of the present application. Exemplarily, the method may include the following steps:

S301. The terminal sends capability information to the network device.

Accordingly, the network device receives the capability information.

As mentioned above, SBFD technology is a newly introduced technology in NR. Some terminals may support SBFD, while others may not. For terminals that support SBFD, in order to allow the terminal to switch the bandwidth of the filter in time, the terminal should have the ability to support the configuration of time intervals in the SBFD system, or the ability to support bandwidth switching within the time interval. In addition, the terminal can make the network device aware of the terminal's capabilities, so that the network device will schedule transmission and/or time interval configuration according to the terminal's capabilities.

Therefore, the terminal may send capability information to the network device, wherein the capability information includes indication information of the capability of supporting configuration of time intervals in a sub-band full-duplex system; or the capability information includes indication information of the capability of supporting bandwidth switching within a time interval.

Of course, subsequent terminals, that is, terminals supporting SBFD operations, may all have the above capabilities, and the network device also assumes that such terminals have the above capabilities. Therefore, this step is optional and is indicated by a dotted line in the figure.

The filter bandwidth of the terminal refers to the filter bandwidth of the terminal when receiving or sending a signal. By selecting a filter bandwidth that is adapted to the frequency domain range of the signal, out-of-band interference can be reduced and power consumption can be saved.

In one example, the terminal may use different uplink BWPs in the SBFD time slot (or symbol) and the uplink time slot (or symbol), for example, the terminal operates in the first uplink BWP in the uplink time slot (or symbol) and operates in the second and/or third uplink BWP in the SBFD time slot, the frequency domain range of the second and/or third uplink BWP is within the frequency domain range of the first uplink BWP, and the bandwidth of the second and/or third uplink BWP is smaller than the bandwidth of the first uplink BWP.

In another example, different downlink BWPs are used in the SBFD time slot (or symbol) and the downlink time slot (or symbol), for example, the terminal operates in the first downlink BWP in the downlink time slot (or symbol), and operates in the second and/or third downlink BWP in the SBFD time slot (or symbol), the frequency domain range of the second and/or third downlink BWP is within the frequency domain range of the first downlink BWP, and the bandwidth of the second and/or third downlink BWP is smaller than the bandwidth of the first downlink BWP.

In another example, the terminal may operate in the first uplink BWP in an uplink time slot (or symbol) and in the first and/or second uplink subband in an SBFD time slot (or symbol), the frequency domain range of the first and/or second uplink subband is within the frequency domain range of the first uplink BWP, and the bandwidth of the first and/or second uplink subband is smaller than the bandwidth of the first uplink BWP.

In another example, the terminal operates in the first downlink BWP in a downlink time slot (or symbol) and operates in the first and/or second downlink subband in a SBFD time slot (or symbol), the frequency domain range of the first and/or second downlink subband is within the frequency domain range of the first downlink BWP, and the bandwidth of the first and/or second downlink subband is smaller than the bandwidth of the first downlink BWP.

In one implementation, the terminal reports the capability information of supporting bandwidth switching within a time interval, and the length of the time interval may be preset by the protocol.

In another implementation, the terminal reports the capability information of supporting bandwidth switching within the time interval, and the capability information may also include the length of the time interval, which is selected from the candidate set of lengths of the time interval preset by the protocol. Alternatively, the capability information may also include the minimum length of the time interval, which is the minimum time for the terminal to switch in time, and the length of the time interval configured by the network device may be greater than or equal to the minimum length, which is selected from the candidate set of minimum lengths of the time interval preset by the protocol.

In another implementation, the terminal reports the capability information supporting configuration of the time interval in the sub-band full-duplex system, and the length of the time interval may be preset by the protocol. The terminal may switch the bandwidth within the time interval, and may switch between the sub-band bandwidth and the BWP bandwidth, where the bandwidth may be the receiving bandwidth or the sending bandwidth: if it is the receiving bandwidth, the terminal may switch between the downlink sub-band bandwidth and the downlink BWP bandwidth within the time interval; if it is the sending bandwidth, the terminal may switch between the uplink sub-band bandwidth and the uplink BWP bandwidth within the time interval.

In another implementation, the terminal reports the capability information of supporting the configuration of the time interval in the sub-band full-duplex system. The capability information may also include the length of the time interval, which is selected from the candidate set of lengths of the time interval preset by the protocol. Alternatively, the capability information may also include the minimum length of the time interval, which is the minimum time that the terminal has time to switch. The length of the time interval configured by the network device may be greater than or equal to the minimum length, which is selected from the candidate set of minimum lengths of the time interval preset by the protocol. The terminal may perform bandwidth switching within the time interval, and may switch between the sub-band bandwidth and the BWP bandwidth. Here The bandwidth can be a receiving bandwidth or a sending bandwidth: if it is a receiving bandwidth, the terminal can switch between the downlink sub-band bandwidth and the downlink BWP bandwidth within the time interval; if it is a sending bandwidth, the terminal can switch between the uplink sub-band bandwidth and the uplink BWP bandwidth within the time interval.

S302a. The network device determines the time interval (time gap).

S302b. The terminal determines a time interval.

As mentioned above, in an SBFD time slot or SBFD symbol, downlink transmission can only occur outside the UL subband; and/or uplink transmission can only occur outside the DL subband. A resource cycle includes a downlink time slot, an uplink time slot, a flexible time slot and an SBFD time slot, or includes a downlink symbol, an uplink symbol, a flexible symbol and an SBFD symbol. In a traditional DL time slot or a DL symbol of a flexible time slot, the bandwidth of the downlink transmission is the bandwidth of the DL BWP; in a traditional UL time slot or a UL symbol of a flexible time slot, the bandwidth of the uplink transmission is the bandwidth of the UL BWP. The network device schedules the terminal to perform data transmission in the resource cycle. For downlink transmission, the terminal's receiving filter switches from receiving in the DL BWP to receiving in the DL subband, or from receiving in the DL subband to receiving in the DL BWP. A certain time interval is required to allow the terminal to switch the bandwidth size of the receiving filter. Similarly, for uplink transmission, the terminal's transmit filter switches from transmitting within the UL BWP to transmitting within the UL sub-band, or from transmitting within the UL sub-band to transmitting within the UL BWP. A certain time interval is required to allow the terminal to switch the bandwidth size of the transmit filter.

Therefore, the network device and the terminal can determine the appropriate time interval.

Exemplarily, the terminal may determine the above time interval according to the time division duplex parameter and the sub-band full-duplex parameter by receiving the time division duplex parameter and the sub-band full-duplex parameter sent by the network device.

The time division duplex parameter includes at least one of the following parameters: a time slot index of a downlink time slot, a time slot index of an uplink time slot, a time slot index of a flexible time slot, and a symbol index of at least one of an uplink symbol, a downlink symbol, and a flexible symbol in a flexible time slot. The downlink symbols in the downlink time slot and the flexible time slot are used for downlink data transmission; the uplink symbols in the uplink time slot and the flexible time slot are used for uplink data transmission; and the flexible symbols in the flexible time slot can be used for both uplink data transmission and downlink data transmission.

The subband full-duplex parameter includes at least one of the following parameters: a subband full-duplex time unit index, a subband position in a subband full-duplex time unit. In this embodiment, the time unit may be any one of the following: a frame, a subframe, a time slot, a mini-slot, an OFDM symbol. In this embodiment, the time unit is described as a time slot.

Exemplarily, the SBFD time slot can be a part of the time slots in the DL time slot or UL time slot configured in the TDD parameters, that is, the SBFD time slot replaces part or all of the DL time slots configured by the TDD parameters, or the SBFD time slot replaces part or all of the DL time slots configured by the TDD parameters; the SBFD time slot can also be a newly defined time slot that is different from the DL time slot, UL time slot, and flexible time slot, that is, all time slots can be directly configured into four types of time slots, namely, DL time slot, UL time slot, flexible time slot, and SBFD time slot, through the SBFD parameters or the new TDD parameters.

Exemplarily, the SBFD symbol may be a DL symbol configured in the TDD parameters or part of the UL symbols, that is, the SBFD symbol replaces part or all of the DL symbols configured by the TDD parameters, or the SBFD symbol replaces part or all of the DL symbols configured by the TDD parameters; the SBFD time slot may also be a newly defined symbol that is different from the DL symbol, UL symbol, and flexible symbol, that is, all symbols can be directly configured into four types of symbols, namely, DL symbols, UL symbols, flexible symbols, and SBFD symbols, through the SBFD parameters or the new TDD parameters.

The SBFD sub-band refers to the frequency domain position of the uplink sub-band and the downlink sub-band.

Taking the uplink subband included in the DL BWP as an example, as shown in FIG4a, it is a schematic diagram of an SBFD subband provided in an embodiment of the present application. The SBFD time slot includes a frequency domain resource that can be used for uplink transmission. The frequency domain resource is used as the uplink subband. The starting frequency domain position of the uplink subband corresponds to the starting frequency domain position of the DL BWP.

As shown in Figure 4b, which is a schematic diagram of another SBFD subband provided in an embodiment of the present application, the uplink subband in the SBFD time slot is located at the middle frequency domain position of the DL BWP.

Taking downlink transmission as an example, a resource cycle includes one or more DL time slots, one or more UL time slots, one or more flexible time slots, and one or more SBFD time slots. The terminal receives the time division duplex parameter and the sub-band full-duplex parameter sent by the network device, and determines the SBFD time slot and the DL time slot according to the time division duplex parameter and the sub-band full-duplex parameter. Then, the terminal determines the time interval according to the SBFD time slot and the DL time slot.

Exemplarily, determining the time interval may be determining the time domain position of the time interval within a resource cycle.

For example, the position of the time interval may be implemented in the following ways according to a default rule, a protocol preset, or a network configuration, which is not limited in this embodiment:

Implementation 1: The time interval is located within the sub-band full-duplex time unit. For example, taking the time unit as a time slot as an example, FIG5a is a schematic diagram of the position of a time interval provided by an embodiment of the present application. In the resource cycle shown in the figure, there are two time intervals between two downlink time slots. The network device and the terminal perform downlink data transmission in the first downlink time slot, and the data transmission is performed within a DL BWP. Then, the network device and the terminal perform downlink data transmission in the SBFD time slot adjacent to the first downlink time slot (i.e., the first SBFD time slot in the figure), and the data transmission is performed on the DL subband. It takes a certain time interval for the receiving filter of the terminal to switch from receiving in the DL BWP to receiving on the DL subband. This time interval is within the SBFD time slot. In this way, the network device and the terminal can perform downlink data transmission in a complete downlink time slot and a complete BWP, thereby improving resource utilization.

Similarly, the network device and the terminal perform downlink data transmission in the second SBFD time slot, and then the network device and the terminal perform downlink data transmission in the downlink time slot adjacent to the second SBFD time slot (i.e., the second downlink time slot in the figure). In order to facilitate the network device and the terminal to perform downlink data transmission within a complete downlink time slot and a complete DL BWP, the time interval is within the second SBFD time slot.

Implementation 2: The time interval is located within the downlink time unit. Exemplarily, taking the time unit as a time slot as an example, as shown in FIG5b, a schematic diagram of the location of another time interval provided in an embodiment of the present application, in the resource cycle shown in the figure, there are two adjacent SBFD time slots between two downlink time slots, and the network device and the terminal perform downlink data transmission in the first downlink time slot, and the data transmission is performed within a DL BWP. Then, the network device and the terminal perform downlink data transmission in the SBFD time slot adjacent to the first downlink time slot (i.e., the first SBFD time slot in the figure), and the data transmission is performed on the DL subband. It takes a certain time interval for the terminal's receiving filter to switch from receiving within the DL BWP to receiving on the DL subband. The time interval is located within the downlink time slot.

Similarly, the network device and the terminal perform downlink data transmission in the second SBFD time slot, and then, the network device and the terminal perform downlink data transmission in the downlink time slot adjacent to the second SBFD time slot (ie, the second downlink time slot in the figure), and the time interval is within the second downlink time slot.

Implementation 3: The time interval is within the uplink time unit. For example, taking the time unit as a time slot, there are two adjacent SBFD time slots between two uplink time slots. The network device and the terminal perform uplink data transmission in the first uplink time slot, and the data transmission is performed within a UL BWP. Then, the network device and the terminal perform uplink data transmission in the SBFD time slot adjacent to the first uplink time slot, and the data transmission is performed on the UL subband. It takes a certain time interval for the terminal's transmit filter to switch from receiving in the UL BWP to receiving on the UL subband. The time interval is within the uplink time slot.

Similarly, the network device and the terminal perform uplink data transmission in the second SBFD time slot, and then, the network device and the terminal perform uplink data transmission in an uplink time slot adjacent to the second SBFD time slot, and the time interval is within the second uplink time slot.

Implementation 4: The time interval is within a time unit before a first time, wherein the first time is a boundary between a downlink time unit and a sub-band full-duplex unit adjacent to the downlink time unit, or the first time is a boundary between an uplink time unit and a sub-band full-duplex unit adjacent to the uplink time unit.

Taking the time unit as a time slot as an example, as shown in FIG5c, it is a schematic diagram of the position of another time interval provided by an embodiment of the present application. In the resource cycle shown in the figure, there are two adjacent SBFD time slots between two downlink time slots. The network device and the terminal perform downlink data transmission in the first downlink time slot, and the data transmission is performed within a DL BWP. After the first time, the network device and the terminal perform downlink data transmission in the SBFD time slot adjacent to the first downlink time slot (i.e., the first SBFD time slot in the figure), and the data transmission is performed on the DL subband. It takes a certain time interval for the terminal's receiving filter to switch from receiving in the BWP to receiving on the DL subband. The time interval is located in the downlink time slot before the first time. Among them, the first time is the boundary between the first downlink time slot and the SBFD time slot adjacent to the first downlink time slot.

Similarly, the network device and the terminal perform downlink data transmission in the second SBFD time slot. After the first time, the network device and the terminal perform downlink data transmission in the downlink time slot adjacent to the second SBFD time slot (i.e., the second downlink time slot in the figure), and the time interval is within the SBFD time slot before the first time.

Implementation 5: The time interval is within a time unit after a first time, wherein the first time is a boundary between a downlink time unit and a sub-band full-duplex unit adjacent to the downlink time unit, or the first time is a boundary between an uplink time unit and a sub-band full-duplex unit adjacent to the uplink time unit.

As shown in FIG. 5d, a schematic diagram of the position of another time interval provided in an embodiment of the present application is provided. In the resource cycle shown in the figure, there are two adjacent SBFD time slots between two downlink time slots. The network device and the terminal perform downlink data transmission in the first downlink time slot, and the data transmission is performed within a DL BWP. After the first time, the network device and the terminal perform downlink data transmission in the SBFD time slot adjacent to the first downlink time slot (i.e., the first SBFD time slot in the figure), and the data transmission is performed on the DL subband. It takes a certain time interval for the receiving filter of the terminal to switch from receiving in the DL BWP to receiving on the DL subband. The time interval is located in the SBFD time slot after the first time. Among them, the first time is the boundary between the first downlink time slot and the SBFD time slot adjacent to the first downlink time slot.

Similarly, the network device and the terminal perform downlink data transmission in the second SBFD time slot. After the first time, the network device and the terminal perform downlink data transmission in the downlink time slot adjacent to the second SBFD time slot (i.e., the second downlink time slot in the figure), and the time interval is within the downlink time slot after the first time.

For example, the position of the above time interval may be preset by the protocol. Before the terminal leaves the factory, the time interval may be burned into the storage of the terminal. In storage.

Alternatively, the position of the time interval may be network-configured. For example, the terminal receives first information sent by a network device, and the network device carries the position of the time interval in the first information. For example, the first information may be any one of the following: RRC, medium access control-control element (MAC CE), downlink control information (DCI).

Furthermore, when the network configures the position of the time interval, if the network device receives the above-mentioned capability information sent by the terminal, and the capability information includes the length of the time interval, then the length of the time interval configured by the network device may be greater than or equal to the minimum length of the time interval reported by the terminal, so that the terminal can have time to switch the filter bandwidth.

Furthermore, the network device may first configure the time interval to a smaller length (recorded as the first length), perform data scheduling on the terminal, and record the transmission performance of the terminal device as the first performance (such as the first bit error rate or the first block error rate); then increase the length of the time interval, that is, configure a time interval with a length greater than the first length (recorded as the second length), and record the transmission performance of the terminal device as the second performance (such as the second bit error rate or the second block error rate); continue to increase the length of the time interval, and successively obtain the third length and the corresponding third performance, the fourth length and the corresponding fourth performance… When the performance does not change, the minimum length under the same performance is used as the optimal time interval length of the terminal device, and is continuously configured to the terminal device; or, when the performance continues to increase with the increase of the time interval, the maximum length in the set of alternative time interval values is used as the optimal time interval length of the terminal device, and is continuously configured to the terminal device.

Implementation 6: One or more symbols of the sub-band full-duplex time unit are symbols used for interference and/or channel quality measurement, and the time interval is located before the symbols used for interference and/or channel quality measurement.

As shown in Figure 6, a schematic diagram of the position of another time interval provided in an embodiment of the present application is provided. If the terminal needs to perform measurement on the SBFD time unit, the time-frequency resource position used for measurement is configured by the network device. If the frequency domain position of the measurement resource partially or completely overlaps with the UL subband, and the receiving filter bandwidth of the terminal device during measurement is greater than the DL subband bandwidth, the symbol used for measurement is equivalent to the DL/UL symbol, because the position of the above time interval will be adjusted accordingly. In the figure, the last several symbols of the second SBFD time slot are configured as measurement symbols by the network device, and the position of the time interval moves forward to the SBFD symbol before the measurement symbol.

The measurement may be a measurement signal sent by an interference terminal/network device in a neighboring cell, thereby measuring the interference magnitude; or a measurement signal sent by a network device in the local cell, thereby measuring the communication channel quality. The measurement signal may be a downlink channel state information-reference signal (CSI-RS), a synchronization signal block (SSB), a synchronization signal, an uplink sounding reference signal (SRS), etc.

S303. The network device sends DCI to the terminal.

Accordingly, the terminal receives the DCI.

The DCI is used to schedule the terminal to perform downlink transmission (performed on the PDSCH) or uplink transmission (performed on the PUSCH) on certain time domain resources and frequency domain resources.

In NR, the DCI is carried on PDCCH. The DCI includes two fields: frequency domain resource assignment and time domain resource assignment. The UE determines a time-frequency resource block based on the information in these two fields, and PDSCH/PUSCH will be transmitted in this resource block.

According to different purposes and contents, DCI is divided into many formats and scrambled by different radio network temporary identities (RNTI), such as random access-radio network temporary identity (RA-RNTI), paging-radio network temporary identity (P-RNTI), etc. The PDCCH information of different terminals is distinguished by their corresponding cell-radio network temporary identity (C-RNTI) information, that is, the cyclic redundancy check (CRC) of DCI is masked by C-RNTI.

The network device configures the terminal with a set of candidate PDCCHs (PDCCH candidates) that need to monitor DCI through high-level signaling (such as RRC signaling). Since the terminal does not know in advance which candidate PDCCH the base station will send DCI on, but the terminal can know what downlink control information it currently expects to receive based on the configuration information of the network device, the terminal attempts to decode each candidate PDCCH in this set based on the configuration information, that is, the terminal uses the corresponding RNTI to perform a CRC check on the information on the candidate PDCCH. If the CRC check succeeds, the terminal knows that the DCI information has been successfully decoded. This set is the search space set, as shown in Figure 7. The behavior of the terminal attempting to decode each candidate PDCCH to determine whether the corresponding DCI is received is called blind detection (BD).

As shown in FIG7 , a search space set may be composed of multiple candidate PDCCHs, and different candidate PDCCHs may overlap with each other. In addition, the network side may configure multiple search spaces for the terminal at the same time to detect DCIs of different formats or DCIs carrying different control information. Since these search spaces may not overlap, may overlap partially or completely, that is, the candidate PDCCHs constituting different search spaces may overlap with each other.

S304. The terminal performs data transmission in the time domain resources scheduled by the DCI.

When scheduling data transmission, network equipment should avoid scheduling data at time intervals. Otherwise, the terminal will either be unable to switch the filter bandwidth (which will introduce interference and increase power consumption) or be unable to transmit data at time intervals due to the filter bandwidth switching (affecting performance).

Therefore, after receiving the DCI, the terminal performs data transmission in the time domain resources scheduled by the DCI, wherein the time domain resources do not include the above time interval.

S305. The terminal switches the bandwidth of the filter within the time interval.

Furthermore, the terminal can switch the filter bandwidth at the time interval, and other data transmission operations are the same as those of the traditional terminal. The filter includes a receiving filter and a transmitting filter.

This embodiment provides a design of the time interval between the SBFD time unit and the DL time unit (or UL time unit) in the SBFD system, which facilitates the terminal to adjust the bandwidth of the receiving (or transmitting) filter according to the downlink (or uplink) system bandwidth on different types of time units, reduces interference, saves power consumption of terminal equipment, and improves system performance.

According to a communication method provided in an embodiment of the present application, for an SBFD system, a certain time interval is required for data transmission on sub-bands of different bandwidth sizes. The terminal and the network device determine the time interval, and when the DCI schedules time domain resources for data transmission, the time domain resources do not include the time interval, thereby meeting the design requirements of the SBFD system and improving the reliability of communication.

The terminal can switch the receiving bandwidth and the transmitting bandwidth within the time interval, and use the appropriate bandwidth for signal transmission on the SBFD time unit, which reduces interference and improves performance. At the same time, since data transmission is impossible during the switching process, and the time domain resources for data transmission do not include the time interval, data transmission can be guaranteed not to be affected by the switching process.

For data transmission in the above SBFD system, when there are two non-adjacent subbands of the same transmission direction (DL or UL) in the same SBFD time slot, a new scheduling rule is introduced. As shown in FIG4b , in the SBFD time slot, the uplink subband is located in the middle of the BWP, and there are two non-adjacent downlink subbands of the same downlink transmission direction in the SBFD time slot: downlink subband 1 and downlink subband 2.

One scheduling rule is: for the same terminal, the transmission in the sub-band full-duplex time unit is in the same sub-band.

There are several implementations for this scheduling rule:

One implementation is that there are two non-adjacent sub-bands with the same transmission direction on the sub-band full-duplex time unit, one of the two non-adjacent sub-bands is preset by the protocol or configured by the network, and the frequency domain resources scheduled by the DCI include part or all of the frequency domain resources of one of the sub-bands. Still referring to Figure 4b, for example, there are downlink sub-band 1 and downlink sub-band 2 on the SBFD time slot, and the protocol presets or the network configures downlink sub-band 1, then the frequency domain resources scheduled by the DCI include part or all of the frequency domain resources of downlink sub-band 1.

Another implementation is that there are two non-adjacent sub-bands with the same transmission direction on the sub-band full-duplex time unit, and the frequency domain resources scheduled by the DCI include part or all of the frequency domain resources of the target sub-band, and the target sub-band is one of the two non-adjacent sub-bands. In this implementation, the position of the target sub-band can be relatively flexible.

In one example, the target subband changes with the SBFD time slot, and the change may be periodic or non-periodic.

As shown in FIG8a, a schematic diagram of a frequency domain resource for DCI scheduling provided in an embodiment of the present application includes two SBFD time slots in each resource period. Two resource periods are illustrated in the figure. In a BWP configured with an uplink subband, the downlink subband above the uplink subband is downlink subband 1, and the downlink subband below the uplink subband is downlink subband 2. In this example, in multiple resource periods, the above-mentioned target subband can be changed in the order of downlink subband 1, downlink subband 2, downlink subband 1, downlink subband 2..., that is, corresponding to the first SBFD time slot in the first period, the target subband is downlink subband 1; corresponding to the second SBFD time slot in the first period, the target subband is downlink subband 2; corresponding to the first SBFD time slot in the second period, the target subband is downlink subband 1; corresponding to the second SBFD time slot in the second period, the target subband is downlink subband 2; and so on. In addition, there may also be a time interval between downlink subband 1 and downlink subband 2.

The resource configuration shown in FIG. 8 a may be used as a pattern, which is preset through a protocol or configured to a terminal by a network device.

As shown in Figure 8b, it is a schematic diagram of another frequency domain resource for DCI scheduling provided in an embodiment of the present application. Compared with Figure 8a, in this figure, the position of the target subband does not have a strict change rule, but is configured by the network device. For example, the network device sends an indication information, and the indication information includes 1 bit. When the value of the 1 bit is "0", it indicates that the target subband is downlink subband 1; when the value of the 1 bit is "1", it indicates that the target subband is downlink subband 2.

In another example, the target subband is changed in units of consecutive SBFD time slots.

As shown in Figure 8c, a schematic diagram of another frequency domain resource for DCI scheduling provided in an embodiment of the present application is provided, with continuous SBFD time slots as a unit, the position of the target subband within the unit (i.e., located in the same unit) remains unchanged, and the position of the target subband between units (i.e., located in different units) may change. As shown in the figure, in the first resource cycle, the first two continuous SBFD time slots are transmitted in downlink subband 1, that is, the target subband is downlink subband 1; in the second resource cycle, the second two continuous SBFD time slots are transmitted in downlink subband 2, that is, the target subband is downlink subband 2.

The resource configuration shown in FIG. 8 c may be used as a pattern, which is preset through a protocol or configured to a terminal by a network device.

It can be understood that, for the transmission dynamically scheduled by the network device using DCI in the above step S303, the scheduling of the network device will be within the above target sub-band.

As for the transmission configured by the network device using RRC signaling or other high-level signaling, the scheduling of the network device can make it located within the above-mentioned target subband; or the configuration of the network device may not be restricted, that is, the periodic transmission resources configured by the network device through RRC signaling or other high-level signaling can be located in a non-target subband, and the terminal only transmits within the above-mentioned target subband and does not transmit in the non-target subband, or the terminal device does not use the transmission resources configured by the network device in the non-target subband.

Another scheduling rule is: two scheduling rules (or scheduling behaviors) can be defined: the first scheduling rule is transmission across two subbands, and the second scheduling rule is transmission within one of two non-adjacent subbands. One of the scheduling rules can be set as the default scheduling, and the other scheduling rule can be set as the non-default scheduling.

There are several implementations for this scheduling rule:

One implementation is that when the default scheduling rule is the first scheduling rule, and the DCI schedules the time domain resources according to the second scheduling rule, the time interval between the position of the DCI and the position of the time domain resources scheduled by the DCI is greater than the first time threshold, and the first time threshold is a positive number. Exemplarily, the length of the first time threshold may be preset by the protocol, and multiple lengths may be distinguished according to the capability information of the above-mentioned terminal. Exemplarily, the position of the DCI may be the last symbol of the time domain resource where the DCI is located, or the first symbol of the time domain resource where the DCI is located. Exemplarily, the position of the time domain resource scheduled by the DCI may be the last symbol of the time domain resource scheduled by the DCI, or the first symbol of the time domain resource scheduled by the DCI. As shown in FIG9, a transmission scheduling schematic diagram in an SBFD system provided in an embodiment of the present application is provided. Since the terminal receives the DCI blindly within the search space set, the terminal blindly detects the DCI across two subbands. The PDSCH/PUSCH scheduled by the DCI is transmitted in one of the subbands. In this case, the time interval between the last symbol of the DCI and the first symbol of the time domain resources scheduled by the DCI (ie, the time domain resources corresponding to the PDSCH/PUSCH) is greater than the first time threshold so that the terminal has time to switch the bandwidth size of the filter.

Another implementation is that when the default scheduling rule is the second scheduling rule, and the DCI schedules the time domain resources according to the first scheduling rule, the time interval between the position of the DCI and the position of the time domain resources scheduled by the DCI is greater than the second time threshold, and the second time threshold is a positive number. Exemplarily, the position of the DCI can be the last symbol of the time domain resource where the DCI is located, or the first symbol of the time domain resource where the DCI is located. Exemplarily, the position of the time domain resource scheduled by the DCI can be the last symbol of the time domain resource scheduled by the DCI, or the first symbol of the time domain resource scheduled by the DCI. Exemplarily, the length of the second time threshold can be preset by the protocol, and multiple lengths can be distinguished according to the capability information of the above-mentioned terminal. If the network device sends the DCI in one of the subbands, the terminal also receives the DCI on one of the subbands accordingly. The PDSCH/PUSCH scheduled by the DCI is across subbands. For this case, the time interval between the position of the DCI and the position of the time domain resource scheduled by the DCI (i.e., the time domain resource corresponding to the PDSCH/PUSCH) is greater than the second time threshold, so that the terminal has time to switch the bandwidth size of the filter. Exemplarily, the time between the end symbol of the DCI and the start symbol of the PDSCH/PUSCH is greater than the second time threshold.

Another implementation is that the first DCI schedules the transmission of the first data according to the first scheduling rule, and the second DCI schedules the transmission of the second data according to the second scheduling rule, and the time interval between the transmission position of the first data and the transmission position of the second data is greater than the third time threshold, and the third time threshold is a positive number. Exemplarily, the transmission position of the first data can be the last symbol of the time domain resource where the first data is located, or it can be the first symbol of the time domain resource where the first data is located. Exemplarily, the transmission position of the second data can be the last symbol of the time domain resource where the second data is located, or it can be the first symbol of the time domain resource where the second data is located. Exemplarily, the length of the third time threshold can be preset by the protocol, and multiple lengths can be distinguished according to the capability information of the above-mentioned terminal. As shown in Figure 10, a transmission scheduling schematic diagram in another SBFD system provided in an embodiment of the present application is provided, in which transmission 1 is a cross-subband transmission, transmission 2 is an intra-subband transmission, and the transmission position of transmission 1 is greater than the third time threshold from the transmission position of transmission 2, so that the terminal has time to switch the bandwidth size of the filter. Transmission 3 is transmission within the subband, transmission 4 is transmission on the DL time slot (equivalent to cross-subband transmission), and the distance between the transmission position of transmission 3 and the transmission position of transmission 4 is greater than the third time threshold, so that the terminal has time to switch the bandwidth size of the filter. Exemplarily, the distance between the end symbol of the transmission position earlier in time and the start symbol of the transmission position later in time is greater than the third time threshold.

Another implementation is, assuming that the DCI according to the above step S303 performs data transmission in two non-adjacent sub-bands, the terminal can start a timer. Exemplarily, the counting unit of the timer can be an OFDM symbol or a time slot. Exemplarily, the timer can be started when data transmission starts, or it can be started when data transmission ends. The duration of the timer can be determined based on experience or other means, or the network device can select a value from a plurality of candidate value sets preset by the protocol and configure it to the terminal device. During the operation of the timer, if the DCI does not schedule new data transmission, the new data here refers to data different from the data that started the timer, such as the data transmission that started the timer is the transmission of transmission block 1, then the new data transmission refers to the data transmission of transmission block 2, and data block 1 and data block 2 are different data blocks. When the timer stops, the terminal monitors the data in one of the two non-adjacent sub-bands, that is, the terminal uses a smaller filter bandwidth, This is beneficial to saving power consumption of the terminal.

Another implementation is that the number of subbands included in the frequency domain resources for data transmission scheduled by DCI in the SBFD time slot is associated with the number of subbands corresponding to the search space set where the DCI is located. For example, assuming that the number of subbands corresponding to the search space set where the DCI is located is two non-adjacent subbands, the subbands included in the frequency domain resources for data transmission scheduled by DCI in the SBFD time slot are also two non-adjacent subbands. For another example, assuming that the number of subbands corresponding to the search space set where the DCI is located is one of the two non-adjacent subbands, the subbands included in the frequency domain resources for data transmission scheduled by DCI in the SBFD time slot are also one of the two non-adjacent subbands. This can simplify the setting of the communication system.

Another implementation is that the number of subbands included in the frequency domain resources for data transmission scheduled by DCI in the SBFD time slot is associated with the number of subbands corresponding to the control resource set (control resource set, CORESET) where the DCI is located. For example, assuming that the number of subbands corresponding to the control resource set where the DCI is located is two non-adjacent subbands, the subbands included in the frequency domain resources for data transmission scheduled by DCI in the SBFD time slot are also two non-adjacent subbands. For another example, assuming that the number of subbands corresponding to the control resource set where the DCI is located is one of the two non-adjacent subbands, the subbands included in the frequency domain resources for data transmission scheduled by DCI in the SBFD time slot are also one of the two non-adjacent subbands. This can simplify the setting of the communication system.

In general, the above gives the scheduling rules when there are two non-adjacent subbands in the same transmission direction (DL or UL) on the same SBFD time unit, so that the terminal can determine the scheduling rules according to the rules and select the adaptive filter bandwidth, which reduces interference, saves power consumption of the terminal, and improves system performance.

It is understandable that in order to implement the functions in the above embodiments, the network device and the terminal include hardware structures and/or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

Figures 11 and 12 are schematic diagrams of possible communication devices provided by embodiments of the present application. These communication devices can be used to implement the functions of the terminal or network device in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments. In the embodiments of the present application, the communication device can be one of the terminals 120a-120j as shown in Figure 1, or it can be the network device 110a or 110b as shown in Figure 1, or it can be a module (such as a chip) applied to a terminal or a network device.

As shown in Fig. 11, the communication device 1100 includes a processing unit 1110 and a transceiver unit 1120. The communication device 1100 is used to implement the functions of the terminal or network device in the method embodiment shown in Fig. 3 above.

When the communication device 1100 is used to implement the functions of the terminal in the method embodiment shown in Figure 3: the transceiver unit 1120 is used to execute the operations performed by the terminal in steps S301 and S303 in the embodiment shown in Figure 3; the processing unit 1110 is used to execute steps S302b, S304 and S305 in the embodiment shown in Figure 3.

When the communication device 1100 is used to implement the functions of the network device in the method embodiment shown in Figure 3: the transceiver unit 1120 is used to execute the operations performed by the network device in steps S301 and S303 in the embodiment shown in Figure 3; the processing unit 1110 is used to execute step S302a in the embodiment shown in Figure 3.

A more detailed description of the processing unit 1110 and the transceiver unit 1120 can be directly obtained by referring to the relevant description in the method embodiment shown in FIG3 , and will not be repeated here.

As shown in FIG12 , the communication device 1200 includes a processor 1210 and an interface circuit 1220. The processor 1210 and the interface circuit 1220 are coupled to each other. It is understood that the interface circuit 1220 may be a transceiver or an input/output interface. Optionally, the communication device 1200 may further include a memory 1230 for storing instructions executed by the processor 1210 or storing input data required by the processor 1210 to execute instructions or storing data generated after the processor 1210 executes instructions.

When the communication device 1200 is used to implement the method shown in FIG. 3 , the processor 1210 is used to implement the function of the processing unit 1110 , and the interface circuit 1220 is used to implement the function of the transceiver unit 1120 .

When the above communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above method embodiment. The terminal chip receives information from other modules in the terminal (such as a radio frequency module or an antenna), and the information is sent by the network device to the terminal; or the terminal chip sends information to other modules in the terminal (such as a radio frequency module or an antenna), and the information is sent by the terminal to the network device.

When the above communication device is a chip applied to a network device, the network device chip implements the function of the network device in the above method embodiment. The network device chip receives information from other modules in the network device (such as a radio frequency module or an antenna), and the information is sent by the terminal to the network device; or the network device chip sends information to other modules in the network device (such as a radio frequency module or an antenna), and the information is sent by the network device to the terminal.

It is understandable that the processor in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASICs), or a processor. Integrated Circuit, ASIC), Field Programmable Gate Array (Field Programmable Gate Array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general processor can be a microprocessor or any conventional processor.

The method steps in the embodiments of the present application can be implemented by hardware, or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a mobile hard disk, a CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a network device or a terminal device. Of course, the processor and the storage medium can also be present in a network device or a terminal device as discrete components.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device or other programmable device. The computer program or instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instruction may be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server, data center, etc. that integrates one or more available media. The available medium may be a magnetic medium, for example, a floppy disk, a hard disk, a tape; it may also be an optical medium, for example, a digital video disc; it may also be a semiconductor medium, for example, a solid-state hard disk.

In the various embodiments of the present application, unless otherwise specified or provided in a logical conflict, the terms and/or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.

In this application, "at least one" means one or more, and "more than one" means two or more. "And/or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character "/" generally indicates that the previous and next associated objects are in an "or" relationship; in the formula of this application, the character "/" indicates that the previous and next associated objects are in a "division" relationship.

It is understood that the various numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic.

Claims

A communication method, characterized in that the method comprises:

Determine the time interval;

Receiving downlink control information DCI;

Performing data transmission within the time domain resources scheduled by the DCI, wherein the time domain resources do not include the time interval;

The position of the time interval includes at least one of the following:

The time interval is within a sub-band full-duplex time unit;

The time interval is within the uplink time unit;

The time interval is within a downlink time unit;

The time interval is within a time unit before the first time;

The time interval is within a time unit after the first time;

The first time is a boundary between the downlink time unit and a sub-band full-duplex unit adjacent to the downlink time unit, or the first time is a boundary between the uplink time unit and a sub-band full-duplex unit adjacent to the uplink time unit.
The method according to claim 1, characterized in that the method further comprises:

The bandwidth size of the filter is switched within the time interval.
The method according to claim 1 or 2, characterized in that the determining the time interval comprises:

receiving time division duplex parameters and sub-band full duplex parameters;

Determining the time interval according to the time division duplex parameter and the sub-band full-duplex parameter;

The time division duplex parameter includes at least one of the following parameters: a time slot index of a downlink time slot, a time slot index of an uplink time slot, a time slot index of a flexible time slot, and a symbol index of at least one symbol among an uplink symbol, a downlink symbol, and a flexible symbol in the flexible time slot;

The sub-band full-duplex parameter includes at least one of the following parameters: a sub-band full-duplex time unit index, and a sub-band position in the sub-band full-duplex time unit.
The method according to any one of claims 1-3 is characterized in that the position of the time interval is preset by the protocol.
The method according to any one of claims 1 to 3, characterized in that the method further comprises:

First information is received, the first information comprising a location of the time interval.
The method according to any one of claims 1 to 5, characterized in that the method further comprises:

Capability information is sent, where the capability information includes indication information of a capability to support configuration of the time interval in a sub-band full-duplex system.
The method according to claim 6, characterized in that the capability information also includes a minimum length of the time interval; or

The length of the time interval is preset by the protocol.
The method according to any one of claims 1-7 is characterized in that one or more symbols of the sub-band full-duplex time unit are symbols used for interference and/or channel quality measurement, and the time interval is located before the symbol used for interference and/or channel quality measurement.
The method according to any one of claims 1-8 is characterized in that there are two non-adjacent sub-bands with the same transmission direction on the sub-band full-duplex time unit, one of the two non-adjacent sub-bands is preset by the protocol or configured by the network, and the frequency domain resources scheduled by the DCI include part or all of the frequency domain resources of one of the sub-bands.
The method according to any one of claims 1 to 8, characterized in that there are two non-adjacent sub-bands with the same transmission direction on the sub-band full-duplex time unit, the frequency domain resources scheduled by the DCI include part or all of the frequency domain resources of the target sub-band, and the target sub-band is one of the two non-adjacent sub-bands;

Wherein, the target sub-band changes with the sub-band full-duplex time unit; or

The target sub-band is changed in units of consecutive sub-band full-duplex time units.
The method according to any one of claims 1 to 10, characterized in that:

When the default scheduling rule is the first scheduling rule, and the DCI schedules time domain resources according to the second scheduling rule, the time between the position of the DCI and the position of the time domain resources scheduled by the DCI is greater than a first time threshold, and the first time threshold is a positive number; and/or

When the default scheduling rule is the second scheduling rule, and the DCI schedules time domain resources according to the first scheduling rule, the distance between the position of the DCI and the position of the time domain resources scheduled by the DCI is greater than a second time threshold, and the second time threshold is a positive number; and/or

The first DCI schedules transmission of first data according to the first scheduling rule, and the second DCI schedules transmission of second data according to the second scheduling rule, and a time interval between a transmission position of the first data and a transmission position of the second data is greater than a third time threshold, and the third time threshold is a positive number;

The first scheduling rule is transmission across two sub-bands, and the second scheduling rule is transmission within one of two non-adjacent sub-bands.
The method according to any one of claims 1 to 11, characterized in that there are two non-adjacent sub-bands with the same transmission direction on the sub-band full-duplex time unit, and the frequency domain resources scheduled by the DCI include the two non-adjacent sub-bands, and the method further includes:

Perform data transmission in the two non-adjacent sub-bands according to the DCI, and start a timer;

If there is no new data transmission during the running period of the timer, then when the timer stops, data is monitored in one of the two non-adjacent sub-bands.
The method according to any one of claims 1-12 is characterized in that the number of subbands included in the frequency domain resources for data transmission scheduled by the DCI within the sub-band full-duplex time unit is associated with the number of subbands corresponding to the search space set where the DCI is located.
A communication method, characterized in that the method comprises:

Determine the time interval;

Send downlink control information DCI;

Performing data transmission within the time domain resources scheduled by the DCI, wherein the time domain resources do not include the time interval;

The position of the time interval includes at least one of the following:

The time interval is within a sub-band full-duplex time unit;

The time interval is within the uplink time unit;

The time interval is within a downlink time unit;

The time interval is within a time unit before the first time;

The time interval is within a time unit after the first time;

The first time is a boundary between the downlink time unit and a sub-band full-duplex unit adjacent to the downlink time unit, or the first time is a boundary between the uplink time unit and a sub-band full-duplex unit adjacent to the uplink time unit.
The method according to claim 14, characterized in that the determining the time interval comprises:

Sending time division duplex parameters and sub-band full-duplex parameters;

Determining the time interval according to the time division duplex parameter and the sub-band full-duplex parameter;

The time division duplex parameter includes at least one of the following parameters: a time slot index of a downlink time slot, a time slot index of an uplink time slot, a time slot index of a flexible time slot, and a symbol index of at least one symbol among an uplink symbol, a downlink symbol, and a flexible symbol in the flexible time slot;

The sub-band full-duplex parameter includes at least one of the following parameters: a sub-band full-duplex time unit index, and a sub-band position in the sub-band full-duplex time unit.
The method according to claim 14 or 15 is characterized in that the position of the time interval is preset by the protocol.
The method according to claim 14 or 15, characterized in that the method further comprises:

First information is sent, wherein the first information includes a position of the time interval.
The method according to any one of claims 14 to 17, characterized in that the method further comprises:

Capability information is received, the capability information including indication information of a capability to support configuration of the time interval in a sub-band full-duplex system.
The method according to claim 18, characterized in that the capability information also includes a minimum length of the time interval; or

The length of the time interval is preset by the protocol.
The method according to any one of claims 14-19 is characterized in that one or more symbols of the sub-band full-duplex time unit are symbols used for interference and/or channel quality measurement, and the time interval is located before the symbol used for interference and/or channel quality measurement.
The method according to any one of claims 14-20 is characterized in that there are two non-adjacent sub-bands with the same transmission direction on the sub-band full-duplex time unit, one of the two non-adjacent sub-bands is preset by the protocol or configured by the network, and the frequency domain resources scheduled by the DCI include part or all of the frequency domain resources of one of the sub-bands.
The method according to any one of claims 14 to 21, characterized in that there are two non-adjacent sub-bands with the same transmission direction on the sub-band full-duplex time unit, the frequency domain resources scheduled by the DCI include part or all of the frequency domain resources of the target sub-band, and the target sub-band is one of the two non-adjacent sub-bands;

Wherein, the target sub-band changes with the sub-band full-duplex time unit; or

The target sub-band is changed in units of consecutive sub-band full-duplex time units.
The method according to any one of claims 14 to 22, characterized in that:

When the default scheduling rule is the first scheduling rule, and the DCI schedules time domain resources according to the second scheduling rule, the time between the position of the DCI and the position of the time domain resources scheduled by the DCI is greater than a first time threshold, and the first time threshold is a positive number; and/or

When the default scheduling rule is the second scheduling rule, and the DCI schedules time domain resources according to the first scheduling rule, the distance between the position of the DCI and the position of the time domain resources scheduled by the DCI is greater than a second time threshold, and the second time threshold is a positive number; and/or

The first DCI schedules transmission of first data according to the first scheduling rule, and the second DCI schedules transmission of second data according to the second scheduling rule, and a time interval between a transmission position of the first data and a transmission position of the second data is greater than a third time threshold, and the third time threshold is a positive number;

The first scheduling rule is transmission across two sub-bands, and the second scheduling rule is transmission within one of two non-adjacent sub-bands.
The method according to any one of claims 14-23 is characterized in that the number of subbands included in the frequency domain resources for data transmission scheduled by the DCI within the sub-band full-duplex time unit is associated with the number of subbands corresponding to the search space set where the DCI is located.
A communication device, characterized by comprising a module for executing the method as described in any one of claims 1-24.
A communication device, characterized in that it includes a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or send signals from the processor to other communication devices outside the communication device, and the processor is used to implement the method described in any one of claims 1-24 through a logic circuit or executing code instructions.
A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method according to any one of claims 1 to 24.