Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and a communication apparatus. The method comprises: receiving first downlink control information (DCI), wherein the first DCI is used for scheduling a first transmission resource; and on the basis of a transmission direction corresponding to the first transmission resource, determining a first transmission direction corresponding to a first time unit, wherein the first time unit comprises a plurality of symbols, the first transmission resource occupies at least one of the plurality of symbols included in the first time unit, the first transmission direction comprises one of an uplink transmission direction and a downlink transmission direction, and the interval between the last symbol occupied by the first DCI and the first symbol of the first time unit is greater than or equal to a first preset value. In the present application, a transmission direction corresponding to an entire slot is determined by means of a transmission direction corresponding to a transmission resource scheduled by using DCI, and a sufficient amount of time is reserved for switching between uplink transmission and downlink transmission, thereby ensuring switching flexibility, and also reducing the processing complexity of a terminal device.

Description

Communication method and communication apparatus

[0001] The present application claims priority to the Chinese patent application No. 202411011168.2, filed on July 25, 2024, entitled "Communication method and communication apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication, and more particularly, to a communication method and a communication apparatus. BACKGROUND

[0003] In new radio (NR), a terminal device performs uplink transmission on an uplink symbol and performs downlink reception on a downlink symbol; in a system that can switch between uplink transmission direction and downlink transmission direction, when switching between the uplink transmission direction and the downlink transmission direction, a certain switching time is required, and there is also a requirement for the number of switching occasions between the uplink transmission direction and the downlink transmission direction. For example, in a time division duplex (TDD) system, the switching occasion points of dynamic uplink transmission direction and downlink transmission direction switching only occur on flexible symbols, and in a subband full duplex (SBFD) system introduced to solve the latency problem of TDD, part of the downlink (DL) symbols and the flexible symbols are further configured as SBFD symbols. When all the SBFD symbols and the flexible symbols are the alternative switching occasions of the uplink transmission direction and the downlink transmission direction switching, it will cause the complexity of the terminal device processing. Therefore, how to reduce the complexity of the terminal device processing while ensuring scheduling flexibility is a problem worth considering. SUMMARY

[0004] The present application provides a communication method and a communication apparatus to reduce the complexity of the terminal device processing while ensuring scheduling flexibility.

[0005] In a first aspect, a communication method is provided, which is applied to a terminal device side, that is, the method can be executed by a terminal device, or can be executed by a component (such as a chip or a chip system or a circuit) of the terminal device, and the present application does not limit this.

[0006] The method can comprise: receiving first downlink control information (DCI), the first DCI being used for scheduling a first transmission resource; determining a first transmission direction corresponding to a first time unit according to a transmission direction corresponding to the first transmission resource, the first time unit comprising a plurality of symbols, the first transmission resource occupying at least one symbol of the plurality of symbols comprised in the first time unit, wherein the first transmission direction comprises one of an uplink transmission direction and a downlink transmission direction, and an interval between a last symbol occupied by the first DCI and a first symbol of the first time unit is greater than or equal to a first preset value.

[0007] Based on the above scheme, the transmission direction corresponding to the first time unit can be determined according to the transmission direction corresponding to the transmission resource scheduled by the first DCI, so that the transmission direction corresponding to the time unit in which the transmission resource scheduled by the first DCI is located can be determined by one DCI scheduling, and by limiting the time sequence of the first DCI, it is ensured that the terminal device has sufficient time when switching between uplink transmission and downlink transmission, thereby reducing the complexity of processing of the terminal device.

[0008] In a second aspect, a communication method is provided, which is applied to a terminal device side, that is, the method can be executed by a terminal device, or can be executed by a component (for example, a chip or a chip system or a circuit) of the terminal device, and the present application does not limit this.

[0009] The method can comprise: receiving first downlink control information (DCI), the first DCI being used for scheduling a first transmission resource; determining a first transmission direction corresponding to a first time unit according to a transmission direction corresponding to the first transmission resource, the first time unit comprising a plurality of symbols, the first transmission resource occupying at least one symbol of the plurality of symbols comprised in the first time unit, wherein the first transmission direction comprises one of an uplink transmission direction and a downlink transmission direction, and an interval between a last symbol occupied by the first DCI and a first symbol of the first time unit is greater than or equal to a first preset value.

[0010] The beneficial effects and possible designs of the second aspect can be referred to the related description in the first aspect, and will not be described here.

[0011] In some implementations, the method further includes: receiving a second DCI, the second DCI being used to schedule a third transmission resource, the third transmission resource occupying at least one symbol of the plurality of symbols included in the first time unit, the third transmission resource corresponding to a second transmission direction, the second transmission direction being different from the first transmission direction; and switching the transmission direction corresponding to the symbol occupied by the third transmission resource from the first transmission direction to the second transmission direction, wherein a gap between a last symbol occupied by the second DCI and a first symbol of the first time unit is greater than or equal to a third preset value.

[0012] Optionally, the method further includes: receiving a second DCI, the second DCI being used to schedule a third transmission resource, the third transmission resource occupying at least one symbol of the plurality of symbols included in the first time unit, the third transmission resource corresponding to a second transmission direction, the second transmission direction being different from the first transmission direction; and determining, from the first transmission direction and the second transmission direction, that the transmission direction corresponding to the symbol occupied by the third transmission resource is the second transmission direction, wherein a gap between a last symbol occupied by the second DCI and a first symbol of the first time unit is greater than or equal to a third preset value.

[0013] It should be noted that switching the transmission direction corresponding to the symbol occupied by the third transmission resource from the first transmission direction to the second transmission direction can also be understood as determining, from the first transmission direction and the second transmission direction, that the transmission direction corresponding to the symbol occupied by the third transmission resource is the second transmission direction.

[0014] Based on the above scheme, on the basis of determining the first transmission direction corresponding to the first time unit, when the terminal device receives a second DCI, by limiting the timing of the second DCI, sufficient time is reserved for the terminal device to complete the scheduling transmission of each time unit before the start of the time unit, reducing the complexity of processing of the terminal device, and by allowing the transmission direction corresponding to the transmission resource scheduled by the second DCI to be opposite to the first transmission direction corresponding to the first time unit, the flexibility of scheduling is increased.

[0015] In some implementations, the first capability information is transmitted, the first capability information being used to indicate the capability of the terminal device to switch between the first transmission direction and the second transmission direction.

[0016] Based on the above scheme, the terminal device transmits to the network device whether the terminal device has the capability of switching between the uplink transmission direction and the downlink transmission direction, so that the network device knows which terminal devices have the capability of switching between the uplink transmission direction and the downlink transmission direction.

[0017] In some implementations, the first capability information is used to indicate any one of: a capability of the terminal device to keep a transmission direction unchanged in the first time unit; a capability of the terminal device to switch between the first transmission direction and the second transmission direction at any position; and a capability of the terminal device to dynamically switch between the first transmission direction and the second transmission direction.

[0018] In some implementations, the first capability information is used to determine a number of switching occasions for switching between the first transmission direction and the second transmission direction within the first time unit or a period of the SBFD, and / or a position of the switching occasion for switching between the first transmission direction and the second transmission direction, the switching occasion corresponding to a symbol for switching from the first transmission direction to the second transmission direction.

[0019] In some implementations, the position of the switching occasion for switching between the first transmission direction and the second transmission direction is a boundary of the first time unit; or the position of the switching occasion for switching between the first transmission direction and the second transmission direction is between an SBFD symbol and a non-SBFD symbol.

[0020] Based on the above scheme, by limiting the number and position of the switching occasions for switching between the uplink transmission direction and the downlink transmission direction in the first time unit including the SBFD symbol and / or the flexible symbol, the flexibility of the SBFD system scheduling and the transmission efficiency of the SBFD system are ensured, and the complexity of the terminal device processing is reduced.

[0021] In a third aspect, a communication method is provided, which is applied to a network device side, i.e., the method can be executed by a network device, or can be executed by a component (such as a chip or a chip system or a circuit) of the network device, which is not limited in the present application.

[0022] The method can include: generating a first downlink control information (DCI), the first DCI being used to schedule a first transmission resource, the first transmission resource occupying at least one symbol in a plurality of symbols included in a first time unit, the first time unit corresponding to a first transmission direction, the first transmission direction being determined according to a transmission direction corresponding to the first transmission resource, and the first transmission direction including one of an uplink transmission direction and a downlink transmission direction, wherein an interval between a last symbol occupied by the first DCI and a first symbol of the first time unit is greater than or equal to a first preset value; and transmitting the first DCI.

[0023] In a fourth aspect, a communication method is provided, which is applied to a network device side, i.e., the method can be executed by a network device or a component (e.g., a chip or a chip system or a circuit) of the network device, and the present application does not limit this.

[0024] The method can include: generating a first downlink control information (DCI), the first DCI being used for scheduling a first transmission resource, the first transmission resource occupying at least one symbol in a plurality of symbols included in a first time unit, the first time unit corresponding to a first transmission direction, the first transmission direction being determined according to a transmission direction corresponding to the first transmission resource, and the first transmission direction including one of an uplink transmission direction and a downlink transmission direction, wherein an interval between a last symbol occupied by the first DCI and a first symbol occupied by a second transmission resource is greater than or equal to a second preset value, the second transmission resource being a semi-statically configured transmission resource, the second transmission resource occupying at least one symbol in the plurality of symbols included in the first time unit, and the second transmission resource being different from a symbol occupied by the first transmission resource; and transmitting the first DCI.

[0025] In combination with the third aspect or the fourth aspect, in some implementations, the method further includes: transmitting a second DCI, the second DCI being used for scheduling a third transmission resource, the third transmission resource occupying at least one symbol in the plurality of symbols included in the first time unit, the third transmission resource corresponding to a second transmission direction, the second transmission direction being different from the first transmission direction, wherein an interval between a last symbol occupied by the second DCI and a first symbol of the first time unit is greater than or equal to a third preset value.

[0026] In combination with the third aspect or the fourth aspect, in some implementations, first capability information is received, the first capability information being used for indicating a capability of the terminal device for switching between the first transmission direction and the second transmission direction.

[0027] In combination with the third aspect or the fourth aspect, in some implementations, the first capability information is used for indicating any one of: a capability of the terminal device for keeping a transmission direction unchanged within the first time unit; a capability of the terminal device for switching between the first transmission direction and the second transmission direction at any position; and a capability of the terminal device for dynamically switching between the first transmission direction and the second transmission direction.

[0028] In some implementations, in combination with the third aspect or the fourth aspect, the first DCI includes configuration information of a sub-band full duplex (SBFD) symbol, the configuration information of the SBFD symbol being used to determine a number of switching occasions for switching between the first transmission direction and the second transmission direction within the first time unit or a period of the SBFD, and / or a position of the switching occasion for switching between the first transmission direction and the second transmission direction, the switching occasion corresponding to a symbol for switching from the first transmission direction to the second transmission direction.

[0029] In some implementations, in combination with the third aspect or the fourth aspect, the position of the switching occasion for switching between the first transmission direction and the second transmission direction is a boundary of the first time unit; or the position of the switching occasion for switching between the first transmission direction and the second transmission direction is between the SBFD symbol and a non-SBFD symbol.

[0030] The beneficial effects and possible designs related to the third aspect or the fourth aspect can be referred to the related description of the first aspect, and will not be repeated here.

[0031] In a fifth aspect, a communication method is provided, which is applied to a terminal device side, i.e., the method can be executed by a terminal device, or can be executed by a component (e.g., a chip or a chip system or a circuit) of the terminal device, and the present application does not limit this.

[0032] The method can include: receiving semi-static configuration information, the semi-static configuration information being used to indicate a fourth transmission resource; and determining a third transmission direction corresponding to a first time unit according to a transmission direction corresponding to the fourth transmission resource, the first time unit including a plurality of symbols, the fourth transmission resource occupying at least one symbol of the plurality of symbols included in the first time unit, wherein the third transmission direction includes one of an uplink transmission direction and a downlink transmission direction.

[0033] Based on the above scheme, the transmission direction corresponding to the first time unit can be determined based on the transmission direction corresponding to the semi-statically configured transmission resource, so that the transmission direction corresponding to the time unit in which the semi-statically configured transmission resource is located can be determined. Furthermore, by limiting the timing of the third DCI, it is ensured that the terminal device has sufficient time to switch between uplink transmission and downlink transmission, thereby reducing the complexity of the terminal device.

[0034] In some implementations of the fifth aspect, in combination with the fifth aspect, the third transmission direction corresponding to the first time unit is determined according to a transmission direction corresponding to the fourth transmission resource, including: when an interval between a first symbol occupied by the fourth transmission resource and a first symbol of the first time unit is the smallest, the third transmission direction is the same as the transmission direction corresponding to the fourth transmission resource; or when a priority of a type of the fourth transmission resource is the highest, the third transmission direction is the same as the transmission direction corresponding to the fourth transmission resource, the type of the fourth transmission resource including: a data transmission resource, a control transmission resource, and a reference signal transmission resource; or when a priority of the fourth transmission resource is the highest, the third transmission direction is the same as the transmission direction corresponding to the fourth transmission resource; or when the transmission corresponding to the fourth transmission resource is a non-first transmission in K times of repeated transmissions, and at least one transmission in the K times of repeated transmissions has been performed before the fourth transmission resource, the third transmission direction is the same as the transmission direction corresponding to the fourth transmission resource, K is an integer greater than or equal to 2.

[0035] Based on the above scheme, according to the semi-statically configured transmission resource, the transmission direction corresponding to the entire first time unit in which the semi-statically configured transmission resource is located can be determined, and by limiting the timing of the third DCI, sufficient time is ensured for the terminal device to switch between uplink transmission and downlink transmission, thereby reducing the complexity of processing of the terminal device.

[0036] In some implementations of the fifth aspect, in combination with the fifth aspect, a third downlink control information (DCI) is received, the third DCI being used to schedule a fifth transmission resource, the fifth transmission resource occupying at least one symbol of a plurality of symbols included in the first time unit, the fifth transmission resource corresponding to a fourth transmission direction, the fourth transmission direction being different from the third transmission direction; and a transmission direction corresponding to the symbol occupied by the fifth transmission resource is switched from the third transmission direction to the fourth transmission direction, wherein an interval between a last symbol occupied by the third DCI and a first symbol of the first time unit is greater than or equal to a fourth preset value.

[0037] Based on the above scheme, on the basis of determining the third transmission direction corresponding to the first time unit, when the terminal device receives a third DCI, by limiting the timing of the third DCI, sufficient time is reserved for the terminal device to complete the scheduled transmission of the time unit before the start of each time unit, thereby reducing the complexity of processing of the terminal device, and by allowing the transmission direction corresponding to the transmission resource scheduled by the third DCI to be opposite to the third transmission direction corresponding to the first time unit, the flexibility of scheduling is increased.

[0038] In some implementations of the fifth aspect, in combination with the fifth aspect, the method further includes: sending second capability information, the second capability information being used to indicate a capability of the terminal device to switch between the third transmission direction and the fourth transmission direction.

[0039] According to the above scheme, the terminal device sends to the network device whether the terminal device has the capability to switch between the uplink transmission direction and the downlink transmission direction, so that the network device knows which terminal devices have the capability to switch between the uplink transmission direction and the downlink transmission direction.

[0040] In some implementations of the fifth aspect, in combination with the fifth aspect, the second capability information is used to indicate any one of: a capability of the terminal device to keep the transmission direction unchanged in the first time unit; a capability of the terminal device to switch between the third transmission direction and the fourth transmission direction at any position; and a capability of the terminal device to dynamically switch between the third transmission direction and the fourth transmission direction.

[0041] In some implementations of the fifth aspect, in combination with the fifth aspect, the second capability information is used to determine a number of switching occasions for switching between the third transmission direction and the fourth transmission direction of the terminal device in the first time unit or a period of the SBFD, and / or a position of the switching occasion for switching between the third transmission direction and the fourth transmission direction, the switching occasion corresponding to a symbol for switching from the third transmission direction to the fourth transmission direction.

[0042] In some implementations of the fifth aspect, in combination with the fifth aspect, the position of the switching occasion for switching between the third transmission direction and the fourth transmission direction is a boundary of the first time unit; or the position of the switching occasion for switching between the third transmission direction and the fourth transmission direction is between the SBFD symbol and the non-SBFD symbol.

[0043] According to the above scheme, by limiting the number and position of the switching occasions for switching between the uplink transmission direction and the downlink transmission direction in the first time unit including the SBFD symbol and / or the flexible symbol, the flexibility of the SBFD system scheduling and the transmission efficiency of the SBFD system are ensured, and the complexity of the terminal device processing is reduced.

[0044] The sixth aspect provides a communication method, which is applied to a network device side, that is, the method can be executed by the network device, or can be executed by a component (for example, a chip or a chip system or a circuit) of the network device, and the present application does not limit this.

[0045] The method can comprise: generating semi-static configuration information, the semi-static configuration information being used to indicate a fourth transmission resource, the fourth transmission resource occupying at least one symbol of a plurality of symbols included in a first time unit, the first time unit corresponding to a third transmission direction, the third transmission direction being determined according to a transmission direction corresponding to the fourth transmission resource, and the third transmission direction including one of an uplink transmission direction and a downlink transmission direction; and transmitting the semi-static configuration information.

[0046] In combination with the sixth aspect, in some implementations of the sixth aspect, third downlink control information DCI is transmitted, the third DCI being used to schedule a fifth transmission resource, the fifth transmission resource occupying at least one symbol of a plurality of symbols included in the first time unit, the fifth transmission resource corresponding to a fourth transmission direction, the fourth transmission direction being different from the third transmission direction, wherein a gap between a last symbol occupied by the third DCI and a first symbol of the first time unit is greater than or equal to a fourth preset value.

[0047] In combination with the sixth aspect, in some implementations of the sixth aspect, the method further comprises: receiving second capability information, the second capability information being used to indicate a capability of the terminal device to switch between the third transmission direction and the fourth transmission direction.

[0048] In combination with the sixth aspect, in some implementations of the sixth aspect, the second capability information is used to indicate any one of: a capability of the terminal device to keep a transmission direction unchanged within the first time unit; a capability of the terminal device to switch between the third transmission direction and the fourth transmission direction at any position; and a capability of the terminal device to dynamically switch between the third transmission direction and the fourth transmission direction.

[0049] In combination with the sixth aspect, in some implementations of the sixth aspect, the second capability information is used to determine a number of switching occasions for switching between the third transmission direction and the fourth transmission direction of the terminal device within the first time unit or a period of the SBFD, and / or a position of a switching occasion for switching between the third transmission direction and the fourth transmission direction, the switching occasion corresponding to a symbol when switching from the third transmission direction to the fourth transmission direction.

[0050] In combination with the sixth aspect, in some implementations of the sixth aspect, the position of the switching occasion for switching between the third transmission direction and the fourth transmission direction is a boundary of the first time unit; or the position of the switching occasion for switching between the third transmission direction and the fourth transmission direction is between an SBFD symbol and a non-SBFD symbol.

[0051] The beneficial effects and possible designs related to the sixth aspect can be referred to the related descriptions of the fifth aspect, and will not be repeated here.

[0052] In a seventh aspect, a communication method is provided, which is applied to a terminal device side, i.e., the method can be executed by a terminal device or a component (e.g., a chip or a chip system or a circuit) of the terminal device, and the present application does not limit this.

[0053] The method can include: receiving first indication information at a first time, the first indication information being used to indicate a fifth transmission direction corresponding to a sixth transmission resource, the fifth transmission direction including one of an uplink transmission direction and a downlink transmission direction, the sixth transmission resource occupying at least one symbol in a plurality of symbols included in a first time unit; receiving fourth downlink control information (DCI) at a second time, the fourth DCI being used to schedule a seventh transmission resource, the seventh transmission resource corresponding to a sixth transmission direction, the sixth transmission direction being different from the fifth transmission direction, the seventh transmission resource occupying at least one symbol in the plurality of symbols included in the first time unit, the seventh transmission resource being different from a symbol occupied by the sixth transmission resource; and switching the fifth transmission direction to the sixth transmission direction, wherein an interval between a last symbol occupied by the fourth DCI and a first symbol occupied by the sixth transmission resource is greater than or equal to a fifth preset value, or an interval between the last symbol occupied by the fourth DCI and a first symbol of the first time unit is greater than or equal to a sixth preset value.

[0054] Optionally, the method can include: receiving first indication information at a first time, the first indication information being used to indicate a fifth transmission direction corresponding to a sixth transmission resource, the fifth transmission direction including one of an uplink transmission direction and a downlink transmission direction, the sixth transmission resource occupying at least one symbol in a plurality of symbols included in a first time unit; receiving fourth downlink control information (DCI) at a second time, the fourth DCI being used to schedule a seventh transmission resource, the seventh transmission resource corresponding to a sixth transmission direction, the sixth transmission direction being different from the fifth transmission direction, the seventh transmission resource occupying at least one symbol in the plurality of symbols included in the first time unit, the seventh transmission resource being different from a symbol occupied by the sixth transmission resource; and determining, from the fifth transmission direction and the sixth transmission direction, that a transmission direction is the sixth transmission direction, wherein an interval between a last symbol occupied by the fourth DCI and a first symbol occupied by the sixth transmission resource is greater than or equal to a fifth preset value, or an interval between the last symbol occupied by the fourth DCI and a first symbol of the first time unit is greater than or equal to a sixth preset value.

[0055] It should be noted that switching the transmission direction to the fifth transmission direction to the sixth transmission direction can also be understood as determining the transmission direction from the fifth transmission direction and the sixth transmission direction to the sixth transmission direction. Based on the above scheme, by taking the transmission direction corresponding to the sixth transmission resource indicated by the first indication information as a reference, in the case that the transmission direction corresponding to the transmission resource scheduled by the dynamic scheduling DCI is opposite to the transmission direction corresponding to the sixth transmission resource, the terminal device has sufficient time to switch between uplink transmission and downlink transmission, thereby reducing the complexity of the terminal device processing.

[0056] In combination with the seventh aspect, in some implementations of the seventh aspect, the method further includes: sending third capability information, the third capability information being used to indicate the capability of the terminal device to switch between the fifth transmission direction and the sixth transmission direction.

[0057] Based on the above scheme, the terminal device sends whether the terminal device itself has the capability of switching between the uplink transmission direction and the downlink transmission direction to the network device, so that the network device knows which terminal devices have the capability of switching between the uplink transmission direction and the downlink transmission direction.

[0058] In combination with the seventh aspect, in some implementations of the seventh aspect, the third capability information is used to indicate any of the following: the capability of the terminal device to keep the transmission direction unchanged within the first time unit; the capability of the terminal device to switch between the fifth transmission direction and the sixth transmission direction at any position; and the capability of the terminal device to dynamically switch between the fifth transmission direction and the sixth transmission direction.

[0059] In combination with the seventh aspect, in some implementations of the seventh aspect, the third capability information is used to determine the number of switching occasions of switching between the fifth transmission direction and the sixth transmission direction of the terminal device within the first time unit or the period of the SBFD, and / or the position of the switching occasion of switching between the fifth transmission direction and the sixth transmission direction, the switching occasion corresponding to a symbol when switching from the fifth transmission direction to the sixth transmission direction.

[0060] In combination with the seventh aspect, in some implementations of the seventh aspect, the position of the switching occasion of switching between the fifth transmission direction and the sixth transmission direction is a boundary of the first time unit; or the position of the switching occasion of switching between the fifth transmission direction and the sixth transmission direction is between the SBFD symbol and the non-SBFD symbol.

[0061] Based on the above scheme, by limiting the number and position of switching occasions between the uplink transmission direction and the downlink transmission direction in the first time unit including the SBFD symbol and / or the flexible symbol, the flexibility of the SBFD system scheduling and the transmission efficiency of the SBFD system are ensured, and the complexity of the terminal device processing is reduced.

[0062] In an eighth aspect, a communication method is provided, which is applied to a network device side, i.e., the method can be executed by a network device or a component (e.g., a chip or a chip system or a circuit) of the network device, which is not limited in the present application.

[0063] The method can include: transmitting first indication information at a first time, the first indication information being used to indicate a fifth transmission direction corresponding to a sixth transmission resource, the fifth transmission direction including one of an uplink transmission direction and a downlink transmission direction, the sixth transmission resource occupying at least one symbol in a plurality of symbols included in a first time unit; and transmitting fourth downlink control information (DCI) at a second time, the fourth DCI being used to schedule a seventh transmission resource, the seventh transmission resource corresponding to a sixth transmission direction, the sixth transmission direction being different from the fifth transmission direction, the seventh transmission resource occupying at least one symbol in the plurality of symbols included in the first time unit, the seventh transmission resource being different from the symbol occupied by the sixth transmission resource; and wherein an interval between a last symbol occupied by the fourth DCI and a first symbol occupied by the sixth transmission resource is greater than or equal to a fifth preset value, or an interval between the last symbol occupied by the fourth DCI and a first symbol of the first time unit is greater than or equal to a sixth preset value.

[0064] In combination with the eighth aspect, in some implementations of the eighth aspect, third capability information is received, the third capability information being used to indicate a capability of the terminal device to switch between the fifth transmission direction and the sixth transmission direction.

[0065] In combination with the eighth aspect, in some implementations of the eighth aspect, the third capability information is used to indicate any one of: a capability of the terminal device to keep the transmission direction unchanged within the first time unit; a capability of the terminal device to switch between the fifth transmission direction and the sixth transmission direction at any position; and a capability of the terminal device to dynamically switch between the fifth transmission direction and the sixth transmission direction.

[0066] In combination with the eighth aspect, in some implementations of the eighth aspect, the third capability information is used to determine a number of switching occasions for switching between the fifth transmission direction and the sixth transmission direction of the terminal device within the first time unit or a period of the SBFD, and / or a position of a switching occasion for switching between the fifth transmission direction and the sixth transmission direction, the switching occasion being a symbol corresponding to a switch from the fifth transmission direction to the sixth transmission direction.

[0067] With reference to the sixth aspect, in some implementations of the sixth aspect, a position of the switching timing at which the fifth transmission direction and the sixth transmission direction switch is a boundary of the first time unit; or the position of the switching timing at which the fifth transmission direction and the sixth transmission direction switch is between the SBFD symbol and the non-SBFD symbol.

[0068] The advantages and possible designs of the eighth aspect can be referred to the related description in the seventh aspect, which will not be repeated here.

[0069] In a ninth aspect, a communication method is provided, which is applied to a terminal device side, i.e., the method can be executed by a terminal device, or can be executed by a component (e.g., a chip or a chip system or a circuit) of the terminal device, which is not limited herein.

[0070] The method can include: receiving second indication information, the second indication information being used to indicate a seventh transmission direction corresponding to a first time unit, the first time unit including a plurality of symbols, the seventh transmission direction including one of an uplink transmission direction and a downlink transmission direction; receiving a fifth downlink control information (DCI), the fifth DCI being used to schedule an eighth transmission resource, the eighth transmission resource occupying at least one symbol of the plurality of symbols in the first time unit, the eighth transmission resource corresponding to an eighth transmission direction, the eighth transmission direction being different from the seventh transmission direction; and switching a transmission direction corresponding to a symbol occupied by the eighth transmission resource from the seventh transmission direction to the eighth transmission direction, wherein an interval between a last symbol occupied by the fifth DCI and a first symbol of the first time unit is greater than or equal to a seventh preset value.

[0071] Based on the above scheme, on the basis of determining the seventh transmission direction corresponding to the first time unit, when the terminal device receives a fifth DCI, by limiting the timing of the fifth DCI, sufficient time is reserved for the terminal device to complete the scheduling transmission of each time unit, which reduces the complexity of processing of the terminal device, and by allowing the transmission direction corresponding to the transmission resource scheduled by the fifth DCI to be opposite to the seventh transmission direction corresponding to the first time unit, the flexibility of scheduling is increased.

[0072] With reference to the ninth aspect, in some implementations of the ninth aspect, the method further includes: sending fourth capability information, the fourth capability information being used to indicate a capability of the terminal device to switch between the seventh transmission direction and the eighth transmission direction.

[0073] Based on the above scheme, the terminal device sends whether it has the capability of switching between the uplink transmission direction and the downlink transmission direction to the network device, so that the network device knows which terminal devices have the capability of switching between the uplink transmission direction and the downlink transmission direction.

[0074] In combination with the ninth aspect, in some implementations of the ninth aspect, the fourth capability information is used to indicate any of the following: the capability of the terminal device of keeping the transmission direction unchanged in the first time unit; the capability of the terminal device of switching between the seventh transmission direction and the eighth transmission direction at any position; and the capability of the terminal device of dynamically switching between the seventh transmission direction and the eighth transmission direction.

[0075] In combination with the ninth aspect, in some implementations of the ninth aspect, the fourth capability information is used to determine the number of switching occasions of switching between the seventh transmission direction and the eighth transmission direction of the terminal device in the first time unit or the period of the SBFD, and / or the position of the switching occasion of switching between the seventh transmission direction and the eighth transmission direction, the switching occasion corresponding to a symbol of switching from the seventh transmission direction to the eighth transmission direction.

[0076] In combination with the ninth aspect, in some implementations of the ninth aspect, the position of the switching occasion of switching between the seventh transmission direction and the eighth transmission direction is the boundary of the first time unit; or the position of the switching occasion of switching between the seventh transmission direction and the eighth transmission direction is between the SBFD symbol and the non-SBFD symbol.

[0077] Based on the above scheme, by limiting the number and position of the switching occasion of switching between the uplink transmission direction and the downlink transmission direction in the first time unit including the SBFD symbol and / or the flexible symbol, the flexibility of the SBFD system scheduling and the transmission efficiency of the SBFD system are ensured, and the complexity of the terminal device processing is reduced.

[0078] The tenth aspect provides a communication method, which is applied to the network device side, that is, the method can be executed by the network device, or can be executed by a component (such as a chip or a chip system or a circuit) of the network device, and the present application does not limit this.

[0079] The method can comprise: sending second indication information, the second indication information being used to indicate a seventh transmission direction corresponding to a first time unit, the first time unit comprising a plurality of symbols, the seventh transmission direction comprising one of an uplink transmission direction and a downlink transmission direction; sending fifth downlink control information (DCI), the fifth DCI being used to schedule an eighth transmission resource, the eighth transmission resource occupying at least one symbol in the plurality of symbols in the first time unit, the eighth transmission resource corresponding to an eighth transmission direction, the eighth transmission direction being different from the seventh transmission direction; a transmission direction corresponding to a symbol occupied by the eighth transmission resource being switched from the seventh transmission direction to the eighth transmission direction, wherein an interval between a last symbol occupied by the fifth DCI and a first symbol of the first time unit is greater than or equal to a seventh preset value.

[0080] In combination with the tenth aspect, in some implementations of the tenth aspect, fourth capability information is sent, the fourth capability information being used to indicate a capability of the terminal device to switch between the seventh transmission direction and the eighth transmission direction.

[0081] In combination with the tenth aspect, in some implementations of the tenth aspect, the fourth capability information is used to indicate any one of: a capability of the terminal device to keep a transmission direction unchanged in the first time unit; a capability of the terminal device to switch between the seventh transmission direction and the eighth transmission direction at any position; and a capability of the terminal device to dynamically switch between the seventh transmission direction and the eighth transmission direction.

[0082] In combination with the tenth aspect, in some implementations of the tenth aspect, the fourth capability information is used to determine a number of switching occasions for switching between the seventh transmission direction and the eighth transmission direction of the terminal device in the first time unit or a period of the SBFD, and / or a position of a switching occasion for switching between the seventh transmission direction and the eighth transmission direction, the switching occasion corresponding to a symbol for switching from the seventh transmission direction to the eighth transmission direction.

[0083] In combination with the sixth aspect, in some implementations of the sixth aspect, the position of the switching occasion for switching between the seventh transmission direction and the eighth transmission direction is a boundary of the first time unit; or the position of the switching occasion for switching between the seventh transmission direction and the eighth transmission direction is between an SBFD symbol and a non-SBFD symbol.

[0084] The beneficial effects and possible designs related to the tenth aspect can be referred to the related descriptions of the ninth aspect, and will not be repeated here.

[0085] In a eleventh aspect, a communication method is provided, which is applied to a terminal device side, i.e., the method can be executed by a terminal device, or can be executed by a component (e.g., a chip or a chip system or a circuit) of the terminal device, and the present application does not limit this.

[0086] The method can include: receiving third indication information, the third indication information being used to indicate that at least one symbol of a plurality of symbols included in a first time unit is a flexible symbol or a sub-band full duplex (SBFD) symbol; receiving sixth downlink control information (DCI), the sixth DCI being used to schedule a ninth transmission resource in part of the plurality of symbols in the first time unit, the ninth transmission resource corresponding to a ninth transmission direction, the ninth transmission direction including one of an uplink transmission direction and a downlink transmission direction; and determining a transmission direction corresponding to the flexible symbol or the SBFD symbol occupied by the ninth transmission resource as the ninth transmission direction, wherein an interval between a last symbol occupied by the sixth DCI and a first symbol of the first time unit is greater than or equal to an eighth preset value.

[0087] Based on the above scheme, the transmission direction corresponding to the transmission resource scheduled by the dynamic scheduling DCI can be determined as the transmission direction corresponding to the flexible symbol or the SBFD symbol in the first time unit, and by constraining the interval between the last symbol occupied by the DCI and the first symbol occupied by the transmission resource scheduled by the DCI, the terminal device can complete the transmission configuration scheduled by the DCI before the start of the first time unit, thereby reducing the complexity of processing by the terminal device.

[0088] In a twelfth aspect, a communication method is provided, which is applied to a network device side, i.e., the method can be executed by a network device, or can be executed by a component (e.g., a chip or a chip system or a circuit) of the network device, and the present application does not limit this.

[0089] The method can include: sending third indication information, the third indication information being used to indicate that at least one symbol of a plurality of symbols included in a first time unit is a flexible symbol or a sub-band full duplex (SBFD) symbol; and sending sixth downlink control information (DCI), the sixth DCI being used to schedule a ninth transmission resource in part of the plurality of symbols in the first time unit, the ninth transmission resource corresponding to a ninth transmission direction, the ninth transmission direction including one of an uplink transmission direction and a downlink transmission direction; wherein an interval between a last symbol occupied by the sixth DCI and a first symbol of the first time unit is greater than or equal to an eighth preset value.

[0090] As to the beneficial effects and possible designs of the twelfth aspect, reference can be made to the related description in the eleventh aspect, and details are not repeated here.

[0091] In a thirteenth aspect, a communication apparatus is provided. The apparatus is configured to perform the method in any one of the first aspect to the twelfth aspect and any possible implementation thereof. Specifically, the apparatus can include a unit and / or module configured to perform the method in any one of the first aspect to the twelfth aspect and any possible implementation thereof, such as a processing unit and / or a communication unit.

[0092] In an implementation form, the apparatus is a communication device, such as a terminal device, or a network device. When the apparatus is a communication device, the communication unit can be a transceiver, or an input / output interface; and the processing unit can be at least one processor. Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0093] In another implementation form, the apparatus is a chip, chip system or circuit, or a communication module for a communication device, such as a terminal device, or a network device. When the apparatus is a chip, chip system or circuit for a communication device, the communication unit can be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or related circuitry, etc. on the chip, chip system or circuit; and the processing unit can be at least one processor, a processing circuit or a logic circuit, etc.

[0094] In a fourteenth aspect, a communication apparatus is provided. The apparatus includes at least one processor configured to cause the apparatus to perform the method in any one of the first aspect to the twelfth aspect and any possible implementation thereof.

[0095] Optionally, the at least one processor is configured to execute computer program or instructions to perform the method in any one of the first aspect to the twelfth aspect and any possible implementation thereof.

[0096] Optionally, the apparatus further includes a memory configured to store the computer program or instructions.

[0097] Optionally, the at least one processor is coupled with the memory configured to store the computer program or instructions. The memory can be external to the apparatus.

[0098] Optionally, the apparatus further includes a communication interface through which the processor reads the instructions on the memory. It can be understood that the communication interface is coupled with the processor, and can be configured to input the computer program or instructions to the processor, or output information in the processor.

[0099] For the operations involved in sending and acquiring / receiving, if no special description is given, or if it does not contradict the actual role or internal logic in the relevant description, it can be understood as output, input, etc. operation, or as sending and receiving operation by radio frequency circuit and antenna, which is not limited in the present application.

[0100] In an implementation manner, the apparatus is a communication device (e.g., a terminal device, or a network device).

[0101] In another implementation manner, the apparatus is a chip, a chip system or a circuit or a communication module for a communication device (e.g., a terminal device, or a network device). Optionally, the chip is a Modem chip, also known as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip containing a modem core.

[0102] In a fifteenth aspect, a computer readable storage medium is provided, and the computer readable medium stores a computer program (e.g., program code) or instructions thereon, which, when executed on a communication apparatus, causes the communication apparatus to perform the method in any one of the first aspect to the twelfth aspect and any possible implementation manner thereof.

[0103] In a sixteenth aspect, a computer program product containing instructions is provided, which, when executed on a computer, causes the computer to perform the method in any one of the first aspect to the twelfth aspect and any possible implementation manner thereof.

[0104] In a seventeenth aspect, a communication system is provided, including a terminal device and a network device. The terminal device is configured to perform the method provided in any one of the first aspect, or the third aspect, or the fifth aspect, or the seventh aspect, or the ninth aspect, or the eleventh aspect, and any possible implementation manner thereof. The network device is configured to perform the method provided in any one of the second aspect, or the fourth aspect, or the sixth aspect, or the eighth aspect, or the tenth aspect, or the twelfth aspect, and any possible implementation manner thereof. BRIEF DESCRIPTION OF DRAWINGS

[0105] FIG. 1 is a schematic diagram of a wireless communication system suitable for embodiments of the present application.

[0106] FIG. 2 is a schematic diagram of processing delay.

[0107] FIG. 3 is a schematic diagram of frequency division duplexing.

[0108] FIG. 4 is a schematic diagram of TDD.

[0109] FIG. 5 is a schematic diagram of SBFD.

[0110] FIG. 6 is a schematic diagram of a communication method 200 according to an embodiment of the present application.

[0111] FIG. 7 is a schematic diagram of a first transmission direction according to an embodiment of the present application.

[0112] FIG. 8 is a schematic diagram of a first transmission direction according to an embodiment of the present application.

[0113] FIG. 9 is a schematic diagram of a first transmission direction switching according to an embodiment of the present application.

[0114] FIG. 10 is a schematic diagram of another communication method 300 according to an embodiment of the present application.

[0115] FIG. 11 is a schematic diagram of a third transmission direction switching according to an embodiment of the present application.

[0116] FIG. 12 is a schematic diagram of another communication method 400 according to an embodiment of the present application.

[0117] FIG. 13 is a schematic diagram of a requirement met by a fifth DCI according to an embodiment of the present application.

[0118] FIG. 14 is a schematic diagram of another communication method 500 according to an embodiment of the present application.

[0119] FIG. 15 is a schematic diagram of a requirement met by a fifth DCI according to an embodiment of the present application.

[0120] FIG. 16 is a schematic diagram of another communication method 600 according to an embodiment of the present application.

[0121] FIG. 17 is a schematic block diagram of a communication apparatus 1000 according to an embodiment of the present application.

[0122] FIG. 18 is a schematic diagram of another communication apparatus 2000 according to an embodiment of the present application.

[0123] FIG. 19 is a schematic diagram of a chip system 3000 according to an embodiment of the present application. DETAILED DESCRIPTION

[0124] The technical solutions in the present application will be described below with reference to the drawings.

[0125] Before introducing the solutions in the present application, the following points are explained.

[0126] (1) In this application, "indication" can include direct indication, indirect indication, explicit indication, implicit indication, etc. When describing that certain indication information indicates A, it can be understood that the indication information carries A, carries an identifier of A, carries B having an association relationship with A, carries an identifier of B having an association relationship with A, etc. In other words, if the receiving side of certain indication information can determine A according to the indication information, it can be described that the indication information indicates A, and the specific determination is not limited. When it is understood that the indication information carries A, "indication" can be replaced by "includes", at this time, similar to the expression "sending / receiving indication information, the indication information indicates A", it can be replaced by "sending / receiving A".

[0127] In this application, the information indicated by the indication information is referred to as to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example, but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or an index of the to-be-indicated information. The to-be-indicated information can also be indirectly indicated by indicating other information, wherein the other information has an association relationship with the to-be-indicated information. The to-be-indicated information can also be only indicated a part, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can also be realized by means of the arrangement order of each information agreed in advance (for example, the protocol stipulates), thereby reducing the indication overhead to a certain extent. In addition, the to-be-indicated information can be sent as a whole, or can be sent separately into multiple sub-information, and the sending period and / or sending time of these sub-information can be the same or different.

[0128] (2) In this application, the expression " / " is used to represent that the objects before and after the association are in an "or" relationship; for example, A / B can represent A or B. The expression "and / or" is used to represent that the objects before and after the association can be in an "and" association relationship or an "or" association relationship; for example, A and / or B can represent the following cases: A exists alone, B exists alone, A and B exist together, wherein A and B can be single or multiple. "At least one of the following" or similar expressions are used to represent any combination of the listed items; for example, at least one of A, B and (or) C can represent the following cases: A exists alone, B exists alone, C exists alone, A and B exist together, B and C exist together, A and C exist together, A, B and C exist together, wherein A, B and C can be single or multiple.

[0129] (3) In this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, which may include direct transmission via the air interface or indirect transmission by other units or modules via the air interface. "Receive information from YY" can be understood as the source of the information being YY, which may include direct reception from YY via the air interface or indirect reception from YY by other units or modules via the air interface. "Send" can also be understood as the "output" of the chip interface, and "receive" can also be understood as the "input" of the chip interface. In other words, sending and receiving can occur between devices, such as between network devices and terminal devices, or within a device, such as between components, modules, chips, software modules, or hardware modules within the device via a bus, wiring, or interface.

[0130] (4) In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terms and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0131] (5) In this application, "first," "second," and "#1," "#2," and "#A" are merely for descriptive convenience and are used to distinguish objects, and are not intended to limit the scope of the embodiments of this application. They are not used to describe the order or sequence of features. It should be understood that such described objects can be interchanged where appropriate in order to describe solutions other than those in the embodiments of this application.

[0132] (6) In this application, "predefined" can mean a standard protocol predefined, or it can mean a pre-agreed or pre-negotiated agreement between devices. Here, "protocol" can refer to a standard protocol in the field of communications, for example, it may include fourth-generation (4G) protocols. th Generation 4G network, fifth generation (5G) network th This application does not limit the scope to network protocols such as generation (5G), NR, 5.5G, future communication network protocols, and related protocols applied in future communication systems.

[0133] (7) In this application, the words "example," "such as," and "for example" are used to mean that an implementation so described is one among many possible implementations. No inference should be drawn that any other implementation is "preferred" or "constitutes all other implementations." The word "example" is used herein to mean one of a number of possible implementations, and not necessarily the preferred or advantageous implementation. In the embodiments of this application, "of", "corresponding" and "corresponding" are sometimes mixed. It should be pointed out that when there is no emphasis on their differences, the meanings expressed are consistent.

[0134] First, introduce the communication system applicable to this application.

[0135] The technical solutions provided by the present application can be applied to various communication systems, such as: 5th generation (5th generation, 5G) or new radio (new radio, NR) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, etc. The technical solutions provided by the present application can also be applied to future communication systems. The technical solutions provided by the present application can also be applied to device to device (device to device, D2D) communication, vehicle to everything (vehicle-to-everything, V2X) communication, machine to machine (machine to machine, M2M) communication, machine type communication (machine type communication, MTC), and internet of things (internet of things, IoT) communication system. The technical solutions provided by the present application can also be applied to non-terrestrial communication network (non-terrestrial network, NTN) system such as inter-satellite communication and satellite communication.

[0136] As an example, the satellite communication system includes a satellite base station and a terminal device. The satellite base station provides communication services for the terminal device. The satellite base station can also communicate with the base station. The satellite can act as a base station, and also as a terminal device. Among them, the satellite can refer to unmanned aerial vehicle, hot air balloon, low earth orbit satellite, medium earth orbit satellite, high earth orbit satellite, etc. The satellite can also refer to non-ground base station or non-ground device, etc.

[0137] As an example, V2X communication can include vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, vehicle-to-network (V2N) communication.

[0138] A device in a communication system can send a signal to another device or receive a signal from another device. Wherein the signal can include information, signaling or data, etc. Wherein the device can also be replaced by an entity, a network entity, a communication device, a communication module, a node, a communication node, etc. In the embodiments of the present application, the device is taken as an example for description.

[0139] The terminal device in the embodiments of the present application can be a device or module with corresponding communication functions for accessing the above-mentioned communication system. The terminal device can include various devices with wireless communication functions, which can be used to connect people, things, machines, etc. The terminal device can be widely used in various scenarios, such as cellular communication, D2D, V2X, peer to peer, M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city UAV, robot, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery, etc. The terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc. The terminal device can be a user equipment (UE) of the 3rd generation partnership project (3GPP) standard, a terminal, a fixed device, a mobile station device or a mobile device, a subscriber unit, a handset, a vehicle-mounted device, a wearable device, a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a wireless data card, a personal digital assistant (PDA), a computer, a tablet computer, a notebook computer, a wireless modem, a handset, a laptop computer, a computer with wireless transceiver function, a smart book, a vehicle, a satellite, a global positioning system (GPS) device, a target tracking device, an aircraft (such as a drone, a helicopter, a multi-copter, a quad-copter, or an airplane, etc.), a ship, a remote control device, a smart home device, an industrial device, a transport vehicle with wireless communication function, a communication module, a road side unit (RSU) with terminal function, or a device built-in the above-mentioned device (such as a communication module, a modem or a chip in the above-mentioned device, etc.), or other processing devices connected to the wireless modem.

[0140] It should be understood that in some scenarios, the UE can also be used as a base station. For example, the UE can act as a scheduling entity, which provides sidelink signals between UEs in V2X, D2D or peer to peer scenarios, etc.

[0141] In the embodiments of the present application, the device for implementing the function of the terminal device, i.e., the terminal device, can be a terminal device or a device capable of supporting the terminal device to implement the function, such as a chip system or a chip or a circuit or a communication module (i.e., a communication module performing a communication function), which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip or can include a chip and other discrete devices. In addition, the device can also be configured with program instructions for performing corresponding communication functions.

[0142] The network device in the embodiments of the present application can be a device or a module with a corresponding communication function. The network device can be a device for communicating with the terminal device, and the network device can also be referred to as an access network device or a radio access network device, such as a network device, which can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) for accessing the terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmission point, primary station, secondary station, motor slide retainer (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, a modem or a chip for being arranged in the foregoing device or apparatus. The base station can also be a mobile switching center and a device assuming a base station function in D2D, V2X, M2M communication, a network side device in a future communication network, a device assuming a base station function in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the network device.

[0143] A base station can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0144] In the embodiments of the present application, the device for implementing the function of the network device can be the network device, or a device capable of supporting the network device to implement the function, such as a chip system or a chip or a circuit or a communication module (i.e., a communication module performing a communication function), which can be installed in the network device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. In addition, program instructions for performing corresponding communication functions can also be configured in the device. In the embodiments of the present application, only the device for implementing the function of the network device is taken as an example of the network device, and the scheme of the embodiments of the present application is not limited.

[0145] The network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface; and can also be deployed on aircraft, balloons and satellites in the air. The scenarios in which the network device and the terminal device are located are not limited in the embodiments of the present application.

[0146] A communication system suitable for the embodiments of the present application is briefly introduced in combination with FIG. 1, as follows.

[0147] Referring to FIG. 1, as an example, FIG. 1 is a schematic diagram of a wireless communication system suitable for the embodiments of the present application. As shown in FIG. 1, the wireless communication system includes a core network device 110, a radio access network device 120, and at least one terminal device, such as terminal device 130 and terminal device 140 in FIG. 1. The terminal device is connected to the radio access network device in a wireless manner, and the radio access network device is connected to the core network device in a wireless or wired manner. The radio access network device can be understood as a network device. The core network device and the radio access network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the radio access network device can be integrated on the same physical device, or a physical device can integrate part of the functions of the core network device and part of the functions of the radio access network device. The terminal device can be fixed in position or movable.

[0148] In the communication between the network device and the terminal device, the network device can manage one or more cells, and each cell can include at least one terminal device. A cell can be understood as an area within the coverage range of the wireless signal of the network device.

[0149] FIG. 1 is only a schematic diagram, and the wireless communication system can further include other devices, such as wireless relay devices and / or wireless backhaul devices, etc., which are not shown in FIG. 1. Embodiments of the present application do not limit the number of core network devices, wireless access network devices and terminal devices included in the wireless communication system.

[0150] For the convenience of understanding the embodiments of the present application, the terms involved in the present application are briefly explained. In addition, for the convenience of description, the network device is taken as a base station and the terminal device is taken as a UE for example in the following description.

[0151] 1) Transmission direction

[0152] The transmission direction is divided into uplink transmission and downlink transmission, wherein the uplink transmission is that the UE sends information to the base station, and the base station receives the information from the UE; the downlink transmission is that the base station sends information to the UE, and the UE receives the information from the base station.

[0153] 2) Processing delay

[0154] The processing delay is that a minimum time is specified for the UE to process a certain signal or channel, and the UE needs to ensure that the processing of the signal or channel is completed within the minimum time when designed, and at the same time, the base station also needs to meet the minimum time when scheduling, that is, in order to ensure that the UE can complete the processing of the signal or channel, sufficient time needs to be left, for example, time greater than or equal to the minimum time is left to make the UE complete the processing of the signal or channel. In the actual processing process, different processing delay requirements will be required for different signals or channels.

[0155] In the embodiments of the present application, the minimum time specified by the processing delay, for example, the first value, the second value, the third value, the fourth value, the fifth value and the sixth value, can be the same value or different values, and the embodiments of the present application do not limit this. In the embodiments of the present application, the first value to the sixth value are taken as t1 for example for description.

[0156] Referring to FIG. 2, as an example, FIG. 2 is a schematic diagram of processing delay. As shown in (a) of FIG. 2, when the base station schedules uplink physical shared channel (PUSCH) transmission by issuing dynamic scheduling downlink control information (DCI), the time between the last symbol of the symbol where the DCI is located and the first symbol of the symbol where the PUSCH is located needs to be greater than or equal to t1, where t1 is a specified minimum time, that is, processing delay, for the UE to receive the DCI, demodulate and decode, and analyze the information in the DCI, and prepare for PUSCH transmission, encoding, and the like. As shown in (b) of FIG. 2, when the UE feeds back a hybrid automatic repeat request-acknowledgment (HARQ-ACK) for a certain downlink physical shared channel (PDSCH), the time between the last symbol of the symbol where the PDSCH is located and the first symbol of the symbol where the uplink physical control channel (PUCCH) carrying the HARQ-ACK is located needs to be greater than or equal to t2, where t2 is a specified minimum time, that is, processing delay, for the UE to receive the PDSCH, demodulate and decode the PDSCH, and prepare for PUCCH transmission, encoding, and the like.

[0157] 3) Dynamic scheduling DCI

[0158] DCI is control information sent by the base station to the UE through the PDCCH, and dynamic scheduling is a process in which the base station allocates radio resources to the UE in real time according to the current radio environment, the state and needs of the UE, and the like. In the dynamic scheduling DCI process, the base station sends DCI to the UE through the PDCCH to inform the UE of the specific parameters and time-frequency resource positions for uplink or downlink data transmission, and then the UE transmits and receives data on the specified time domain and frequency domain resources according to the indication information in the DCI.

[0159] 4) Semi-static configuration

[0160] Semi-static configuration is a parameter and rule configured by the base station side for the UE side, which remains unchanged for a period of time, but in practice, the configured parameter and rule can be modified by the base station side control information if needed. Semi-static configuration can be applied to various scenarios in new radio (NR), for example, it can be used in TDD mode, and the base station specifies the allocation mode of uplink and downlink slots for the UE through semi-static configuration. Specifically, the base station specifies the number of downlink slots, the number of uplink slots, and the configuration of flexible symbols for the UE through semi-static configuration. For another example, the base station configures specific parameters for uplink or downlink data transmission, time domain resource location, and frequency domain resource location for the UE through semi-static configuration. The time domain resource location and frequency domain resource location for data transmission appear periodically with time, and then the UE transmits and receives data on the specified time domain and frequency domain resources according to the configuration information in the semi-static configuration.

[0161] 5) Frequency division duplex (FDD)

[0162] Referring to FIG. 3, as an example, FIG. 3 is a schematic diagram of the structure of time-frequency domain resources of FDD. As shown in FIG. 3, the time domain of FDD includes three slots, which are slot 0, 1, and 2 respectively. Each slot includes an uplink (UL) bandwidth part (BWP) and a downlink (DL) BWP. The DL BWP and the UL BWP are located in different carriers and occupy different frequency domain positions in the same slot. For example, in slot 0, the DL BWP (such as the black area D in FIG. 3) and the UL BWP (such as the white area U in FIG. 3) are located in different carriers. The terminal device can perform downlink transmission on the DL BWP, or perform uplink transmission on the UL BWP of slot 0.

[0163] 6) Time division duplex (TDD)

[0164] Referring to FIG. 4, as an example, FIG. 4 is a schematic diagram of a structure of a time-frequency domain resource of time division duplex (TDD). As shown in FIG. 4, the time domain of TDD includes five time slots, which are time slots 0, 1, 2, 3, and 4, respectively. The center frequency points of a DL BWP and a UL BWP are the same, and the bandwidths of the DL BWP and the UL BWP can be the same or different. The terminal device can only work in the UL BWP or the DL BWP in each symbol. That is, at the same time, the terminal device can only perform uplink or downlink transmission. For example, in the time slot 0, only downlink transmission (such as the black area D in FIG. 4) can be performed, in the time slot 4, only uplink transmission (such as the white area U in FIG. 4) can be performed, and the time slot 3 is a flexible time slot (such as the shaded area F in FIG. 4), which can be used for uplink transmission or downlink transmission, but cannot simultaneously perform uplink and downlink transmission. The minimum granularity of uplink and downlink transmission switching is a symbol. For example, the time slot 3 is a flexible time slot, which is composed of 14 or 12 OFDM symbols, 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, 0≤N≤14, and M+N≤14. The downlink symbols are used for downlink transmission, the uplink symbols are used for uplink transmission, and the flexible symbols can be used for uplink transmission or downlink transmission. The specific transmission direction is notified to the terminal device by the network device through RRC signaling or DCI scheduling.

[0165] Currently, the network device will issue a TDD configuration to the terminal device, wherein the TDD configuration parameters include but are not limited to: time slot indexes of downlink time slots, uplink time slots, and flexible time slots, and symbol indexes of uplink symbols, downlink symbols, and flexible symbols in the flexible time slots. Among them, the downlink symbols in the downlink time slots and the flexible time slots are used for downlink data transmission; the uplink symbols in the uplink time slots and the flexible time slots are used for uplink data transmission; and the flexible symbols in the flexible time slots can be used for uplink data transmission or downlink data transmission.

[0166] Compared with the frequency domain resource of FDD in FIG. 3, TDD occupies less frequency domain resource, but in TDD, uplink and downlink transmission cannot be performed simultaneously, for example, only downlink transmission can be performed in the time slot 0, and uplink transmission cannot be performed, which will cause an increase in uplink transmission delay.

[0167] 7) Sub-band full duplex (SBFD)

[0168] Referring to FIG. 5, FIG. 5 is a schematic diagram of a structure of a time-frequency domain resource of sub-band full duplex (SBFD) as an example. SBFD is to simultaneously configure uplink and downlink transmission resources on a certain symbol or time slot of a TDD system. SBFD can also be referred to as full duplex, complementary TDD (C-TDD), or other names, which are not limited in the present application. For ease of description, SBFD is taken as an example for description in the present application.

[0169] As shown in FIG. 5, there can be uplink transmission resources and downlink transmission resources simultaneously on a time slot. For example, on time slot 0, there is a range of frequency domain resources in the frequency domain range corresponding to a BWP, such as the white area U in FIG. 5, on which uplink transmission can be performed. Thus, uplink transmission can be performed on time slot 0, reducing the latency of uplink transmission. This range of frequency domain resources can also be referred to as an uplink subband (UL subband). At this time, there is also a range of frequency domain resources corresponding to the black area D on time slot 0, on which downlink transmission can be performed. This range of frequency domain resources can also be referred to as a downlink subband (DL subband). That is, the network device can simultaneously perform uplink and downlink transmission on time slot 0. The terminal device can also simultaneously perform uplink and downlink transmission on time slot 0 (i.e., a full-duplex terminal device), and the terminal device can also only perform uplink or downlink transmission (a half-duplex terminal device). For another example, on time slot 3, there is a flexible frequency domain resource (such as the shaded part F in FIG. 5), which can be used for uplink transmission or downlink transmission. Compared with the frequency domain resources of the uplink resources of TDD in FIG. 4, the uplink resources of SBFD are increased, and thus the coverage of uplink transmission can be increased and the latency of uplink transmission can be reduced.

[0170] Currently, the network device will issue an SBFD configuration to the terminal device, where the SBFD configuration parameters include but are not limited to the following parameters: SBFD time slot position, SBFD symbol position, and SBFD subband position in the SBFD time slot. The SBFD time slot position or symbol position is part or all of the time slots / symbols in the DL time slots / symbols or flexible time slots / symbols in the TDD configuration, i.e., part or all of the downlink time slots / symbols or flexible time slots / symbols in the TDD configuration are converted into SBFD symbols. The SBFD subband can be the frequency domain position of the UL subband and / or the DL subband.

[0171] 8) Uplink and downlink transmission switching

[0172] Taking a TDD system as an example, in the TDD system, a terminal device performs uplink transmission on an uplink symbol, performs downlink reception on a downlink symbol, and determines whether to perform uplink transmission or downlink reception on a flexible symbol according to scheduling of a network device. That is, on the flexible symbol of the TDD system, the terminal device needs to adjust the transmission direction in real time according to the scheduling signaling sent by the network device, and therefore, the actual transmission direction of the terminal device is flexible and variable. For example, if a current symbol is an uplink symbol, the terminal device performs uplink transmission, and if a next symbol is a downlink symbol, the terminal device needs to switch to downlink reception. When the terminal device switches between uplink transmission and downlink reception, a certain switching time is needed for adjusting a transmission / reception filter, switching a transmission / reception center frequency point, and the like.

[0173] In existing standards, the capability of the terminal device in the TDD system is defined, for example, feature groups (FGs) 5-1 and 5-1b, where FG 5-1 defines that a maximum number of times of switching between actual downlink / uplink transmission per slot is supported, and FG 5-1b defines whether the terminal device supports more than one time of switching between actual downlink / uplink transmission per slot by means of a parameter tdd-MultiDL-UL-SwitchPerSlot.

[0174] In the TDD system, because the flexible symbol position is not limited, the uplink / downlink transmission switching point can appear at any position. In the SBFD system, the DL symbol or the flexible symbol in the TDD system is further converted into an SBFD symbol, and whether to perform uplink transmission or downlink reception on each SBFD symbol is determined according to the scheduling of the network device. Compared with the TDD system, the number of symbols with flexible and variable transmission directions increases in the SBFD system, and when all the SBFD symbols and the flexible symbols can be uplink / downlink transmission switching points, the complexity of the processing resource scheduling design of the terminal device increases.

[0175] Therefore, the present application proposes that the transmission direction of a whole slot corresponding to a transmission resource corresponding to DCI or semi-static configuration and the transmission direction of the transmission resource corresponding to the DCI or the semi-static configuration is determined according to the transmission resource corresponding to the DCI or the semi-static configuration and the transmission direction of the transmission resource corresponding to the DCI or the semi-static configuration, and sufficient time is ensured for the terminal device to switch between uplink transmission and downlink transmission through the timing requirement of the DCI, so that the transmission direction of the whole slot is determined through one scheduling information, and the complexity of the terminal device is reduced.

[0176] The method provided by the embodiments of the present application will be described in detail below with reference to the drawings. The embodiments provided by the present application can be applied to the scenario shown in the above-mentioned figure, without limitation. In addition, in the embodiments of the present application, for ease of description, the first preset value, the second preset value, the third preset value, the fourth preset value, the fifth preset value, the seventh preset value, and the eighth preset value are described as the same value. It should be understood that the first preset value to the eighth preset value can be different values in some implementations, and the embodiments of the present application do not limit this.

[0177] Referring to FIG. 6, as an example, FIG. 6 is a schematic diagram of a communication method 200 provided by an embodiment of the present application. For ease of description, the terminal device and the network device are exemplarily described below. The terminal device can be replaced by a terminal or a component of the terminal device (for example, a chip or a chip system or a circuit or a communication module), and the network device can be replaced by a component of the network device (for example, a chip or a chip system or a circuit or a communication module). In addition, the steps described below executed by a single execution subject can also be divided into being executed by multiple execution subjects, which can be logically and / or physically separated. The method 200 shown in FIG. 6 can include the following steps.

[0178] 210. The network device sends the first downlink control information to the terminal device. Correspondingly, the terminal device receives the first downlink control information from the network device.

[0179] For ease of description, the first downlink control information is exemplarily described as the first DCI below.

[0180] The first DCI is used to schedule a first transmission resource. The first transmission resource is located in a first time unit, that is, the first transmission resource occupies at least one symbol in the plurality of symbols included in the first time unit.

[0181] Exemplarily, the transmission direction corresponding to the first transmission resource is an uplink transmission direction or a downlink transmission direction, that is, the first DCI can be a DCI (hereinafter referred to as UL-DCI) for scheduling uplink transmission, at this time, the first transmission resource is a PUSCH, and the transmission direction corresponding to the PUSCH is the uplink transmission direction; the first DCI can also be a DCI (hereinafter referred to as DL-DCI) for scheduling downlink transmission, at this time, the first transmission resource is a PDSCH, and the transmission direction corresponding to the PDSCH is the downlink transmission direction.

[0182] It should be noted that, in a possible implementation, the network device sends indication information to the terminal device, and the indication information indicates the first transmission resource. The indication information can be indication information dedicated to transmission direction indication, or can be transmission resource indication information. For example, the indication information is carried in radio resource control (RRC) signaling, medium access control-control element (MAC-CE) signaling, or DCI indication.

[0183] As an example, when the indication information is indication information dedicated to transmission direction indication, the indication information can be carried in existing TDD configuration signaling, or can be carried in SBFD configuration signaling, or can be carried in other newly added configuration signaling for indicating uplink transmission direction and downlink transmission direction.

[0184] As another example, when the indication information is transmission resource indication information, the transmission resource includes uplink transmission resource and downlink transmission resource, and the transmission resource is used for at least one of the following: transmitting data, transmitting control information, transmitting broadcast information, transmitting random access information, transmitting a reference signal, and transmitting a synchronization signal.

[0185] It should also be noted that, in the embodiments of the present application, the first time unit can also be referred to as a preset time unit, or a time slot. In some implementations, the first time unit can also be referred to as an orthogonal frequency division multiplexing (OFDM) symbol, a micro-slot, a sub-slot, a sub-frame, etc., and the embodiments of the present application do not limit this.

[0186] 220、The terminal device determines a first transmission direction corresponding to the first time unit according to a transmission direction corresponding to the first transmission resource.

[0187] The first time unit includes a plurality of symbols, the first transmission resource occupies at least one symbol of the plurality of symbols included in the first time unit, and the first transmission direction includes one of an uplink transmission direction and a downlink transmission direction.

[0188] It should be noted that, according to the transmission direction corresponding to the first transmission resource, the transmission direction corresponding to the first time unit can be understood as the transmission direction corresponding to the plurality of symbols included in the first time unit being the same as the transmission direction corresponding to the first transmission resource, that is, when the transmission direction corresponding to the first transmission resource is a downlink transmission direction, the transmission direction corresponding to the plurality of symbols included in the first time unit is also a downlink transmission direction; when the transmission direction corresponding to the first transmission resource is an uplink transmission direction, the transmission direction corresponding to the plurality of symbols included in the first time unit is also an uplink transmission direction.

[0189] The first DCI needs to meet a timing requirement to reserve sufficient time for the terminal device to perform uplink transmission and downlink transmission.

[0190] As a possible implementation manner, the interval between the last symbol occupied by the first DCI and the first symbol of the first time unit is greater than or equal to a first preset value.

[0191] As an example, it is assumed that there is still other transmission resource in the first time unit, the other transmission resource is scheduled by a corresponding other DCI, the first symbol occupied by the first DCI is arranged before the first symbol occupied by the other DCI, or the last symbol occupied by the first DCI is arranged before the last symbol occupied by the other DCI.

[0192] As another example, it is assumed that there is still other transmission resource in the first time unit, the other transmission resource is scheduled by a corresponding other DCI, the first symbol occupied by the first transmission resource is arranged before the first symbol occupied by the other transmission resource, or the last symbol occupied by the first transmission resource is arranged before the last symbol occupied by the other transmission resource.

[0193] Further, the interval between the symbol occupied by the first DCI and the symbol occupied by the transmission resource (i.e., the first transmission resource) scheduled by the first DCI needs to meet the processing delay requirement, for example, when the first DCI is an UL-DCI, the interval between the last symbol occupied by the first DCI and the first symbol occupied by the first transmission resource is greater than or equal to a first value.

[0194] Referring to FIG. 7, as an example, FIG. 7 is a schematic diagram of a first transmission direction provided by an embodiment of the present application. As shown in (a) of FIG. 7, the transmission resource scheduled by the first DCI in the first time unit is PUSCH, i.e., the first DCI is UL-DCI, the first transmission resource is PUSCH, at this time, the interval between the last symbol occupied by the UL-DCI and the first symbol of the first time unit should be greater than or equal to t0, i.e., the first preset value is t0. Meanwhile, the interval between the last symbol occupied by the UL-DCI and the first symbol occupied by the PUSCH should be greater than or equal to t1, i.e., the first value is t1, wherein t0 and t1 are numbers greater than zero. As shown in (b) of FIG. 7, the transmission resource scheduled by the first DCI in the first time unit is PDSCH, i.e., the first DCI is DL-DCI, the first transmission resource is PDSCH, at this time, the interval between the last symbol occupied by the DL-DCI and the first symbol of the first time unit should be greater than or equal to t0, i.e., the first preset value is t0. Meanwhile, the first symbol occupied by the DL-DCI is before the first symbol occupied by the PDSCH; or the first symbol occupied by the DL-DCI is the same as the first symbol occupied by the PDSCH.

[0195] As another possible implementation manner, the interval between the last symbol occupied by the first DCI and the first symbol occupied by the second transmission resource is greater than or equal to a second preset value, the second transmission resource is a semi-statically configured transmission resource, the second transmission resource occupies at least one symbol of the multiple symbols included in the first time unit, and the second transmission resource is different from the symbol occupied by the first transmission resource.

[0196] For example, the second transmission resource is the first semi-statically configured transmission resource in the first time unit, specifically, when there are other semi-statically configured transmission resources in the first time unit, the first symbol occupied by the second transmission resource is the earliest among the first symbols of all the semi-statically configured transmission resources.

[0197] Referring to FIG. 8, as an example, FIG. 8 is a schematic diagram of a first transmission direction provided by an embodiment of the present application. As shown in (a) of FIG. 8, the transmission resource scheduled by the first DCI in the first time unit is PUSCH, that is, the first DCI is UL-DCI, and the first time unit also includes a semi-statically configured transmission resource, for example, channel state information-reference signal (CSI-RS), at this time, the interval between the last symbol occupied by the UL-DCI and the first symbol occupied by the CSI-RS is greater than or equal to t0, that is, the second preset value is t0. At the same time, the interval between the last symbol occupied by the UL-DCI and the first symbol occupied by the PUSCH is greater than or equal to t1, that is, the first value is t1, wherein t0 and t1 are numbers greater than zero. As shown in (b) of FIG. 8, the transmission resource scheduled by the first DCI in the first time unit is PDSCH, that is, the first DCI is DL-DCI, and the first time unit also includes a semi-statically configured transmission resource, CSI-RS, at this time, the interval between the last symbol occupied by the DL-DCI and the first symbol occupied by the CSI-RS is greater than or equal to t0, that is, the second preset value is t0. At the same time, the first symbol occupied by the DL-DCI is before the first symbol occupied by the PDSCH; or the first symbol occupied by the DL-DCI is the same as the first symbol occupied by the PDSCH. Wherein, the above-mentioned CSI-RS is the first semi-statically configured transmission resource in the first time unit.

[0198] Optionally, when there is other DCI scheduling transmission resource in the first time unit, the transmission direction corresponding to the transmission resource scheduled by the other DCI is the same as the first transmission direction, for example, the first transmission direction is a downlink transmission direction, and the transmission direction corresponding to the transmission resource scheduled by the other DCI in the first time unit is also a downlink transmission direction.

[0199] Optionally, when there is a semi-statically configured transmission resource in the first time unit, and the transmission direction corresponding to the semi-statically configured transmission resource is the same as the first transmission direction, the semi-statically configured transmission is a valid configuration, that is, data transmission can be performed according to the semi-statically configured transmission resource; when the transmission direction corresponding to the semi-statically configured transmission resource is different from the first transmission direction, the semi-statically configured transmission is an invalid configuration, that is, the semi-statically configured transmission resource does not perform data transmission.

[0200] Optionally, after the terminal device determines the first transmission direction corresponding to the first time unit, another DCI is received, the transmission direction corresponding to the transmission resource scheduled by the DCI is different from the first transmission direction, at this time, the terminal device needs to perform transmission direction switching. The specific steps are as follows:

[0201] 221. The network device sends the second DCI to the terminal device. Accordingly, the terminal device receives the second DCI from the network device.

[0202] The second DCI is used to schedule a third transmission resource, the third transmission resource occupies at least one symbol in the plurality of symbols included in the first time unit, the third transmission resource corresponds to a second transmission direction, and the second transmission direction is different from the first transmission direction.

[0203] For example, the first transmission direction is an uplink transmission direction, at this time, the transmission direction corresponding to all the symbols in the first time unit is the uplink transmission direction. After receiving the first DCI, the terminal device further receives the second DCI from the network device, and the transmission direction corresponding to the third transmission resource scheduled by the second DCI is a downlink transmission direction. Therefore, the terminal device needs to switch from the uplink transmission direction to the downlink transmission direction on the symbol occupied by the third transmission resource.

[0204] It should be noted that the third transmission resource occupies at least one symbol in the plurality of symbols included in the first time unit, which can be that the third transmission resource occupies all the symbols in the first time unit, or that the third transmission resource occupies part of the plurality of symbols included in the first time unit. When the third transmission resource occupies all the symbols in the first time unit, the terminal device needs to switch the transmission direction corresponding to all the symbols in the first time unit from the first transmission direction to the second transmission direction. When the third transmission resource occupies part of the plurality of symbols included in the first time unit, the terminal device needs to switch the transmission direction corresponding to the part of the symbols occupied by the third transmission resource from the first transmission direction to the second transmission direction.

[0205] 222. The transmission direction corresponding to the symbol occupied by the third transmission resource is switched from the first transmission direction to the second transmission direction.

[0206] Optionally, the interval between the last symbol occupied by the second DCI and the first symbol of the first time unit is greater than or equal to a third preset value. That is, when the terminal device switches the transmission direction corresponding to the symbol occupied by the third transmission resource from the first transmission direction to the second transmission direction, according to the timing requirement satisfied by the second DCI, sufficient time is provided for the terminal device to switch between the uplink transmission direction and the downlink transmission direction, so as to ensure that the terminal device has sufficient time to switch when receiving the second DCI, and to ensure smooth transmission of data.

[0207] It should be noted that the interval between the symbol occupied by the second DCI and the symbol occupied by the transmission resource (i.e., the third transmission resource) scheduled by the second DCI also needs to meet the processing delay requirement. For example, when the second DCI is an UL-DCI, the interval between the last symbol occupied by the second DCI and the first symbol occupied by the third transmission resource is greater than or equal to a second value.

[0208] It should also be noted that, in the embodiments of the present application, switching the transmission direction corresponding to the symbol occupied by the third transmission resource from the first transmission direction to the second transmission direction can also be understood as determining the transmission direction corresponding to the symbol occupied by the third transmission resource as the second transmission direction from the first transmission direction and the second transmission direction.

[0209] Referring to FIG. 9, as an example, FIG. 9 is a schematic diagram of switching of a first transmission direction provided by an embodiment of the present application. As shown in (a) of FIG. 9, the transmission resource scheduled by the first DCI is a PDSCH, and the first transmission direction corresponding to the first time unit is a downlink transmission direction. The transmission resource scheduled by the second DCI (i.e., an UL-DCI) is a PUSCH, and the transmission direction corresponding to the PUSCH is an uplink transmission direction. Therefore, the transmission direction corresponding to the PUSCH is opposite to the first transmission direction. At this time, in the first time unit, the terminal device switches the transmission direction corresponding to the symbol occupied by the PUSCH from the downlink transmission direction to the uplink transmission direction. The interval between the last symbol occupied by the UL-DCI and the first symbol of the first time unit is greater than or equal to t0, i.e., the third preset value is t0. At the same time, the interval between the last symbol occupied by the UL-DCI and the first symbol occupied by the PUSCH is greater than or equal to t1, i.e., the second value is t1. Here, t0 and t1 are numbers greater than zero.

[0210] As shown in (b) of FIG. 9, the transmission resource scheduled by the first DCI is a PUSCH, and the first transmission direction corresponding to the first time unit is an uplink transmission direction. The transmission resource scheduled by the second DCI (i.e., a DL-DCI) is a PDSCH, and the transmission direction corresponding to the PDSCH is a downlink transmission direction. Therefore, the transmission direction corresponding to the PDSCH is opposite to the first transmission direction. At this time, in the first time unit, the terminal device switches the transmission direction corresponding to the symbol occupied by the PDSCH from the uplink transmission direction to the downlink transmission direction. The interval between the last symbol occupied by the DL-DCI and the first symbol of the first time unit is greater than or equal to t0, i.e., the third preset value is t0. Here, t0 is a number greater than zero.

[0211] As an implementation manner, in a case that the transmission direction corresponding to the third transmission resource is same as the first transmission direction, there is no limit on the interval between the last symbol occupied by the second DCI and the first symbol of the first time unit, i.e., there is no timing requirement on the interval between the last symbol occupied by the second DCI and the first symbol of the first time unit. However, the interval between the symbol occupied by the second DCI and the symbol occupied by the third transmission resource needs to meet the processing delay requirement. For example, when the second DCI is an UL-DCI, the interval between the last symbol occupied by the UL-DCI and the first symbol occupied by the PUSCH scheduled by the UL-DCI is greater than or equal to a second value. For another example, when the second DCI is a DL-DCI, the first symbol occupied by the DL-DCI is before the first symbol occupied by the PDSCH scheduled by the DL-DCI; or the first symbol occupied by the DL-DCI is same as the first symbol occupied by the PDSCH scheduled by the DL-DCI.

[0212] It should be noted that, in the embodiments of the present application, the first transmission direction corresponding to the first time unit can also be referred to as the default transmission direction of the terminal device in the first time unit.

[0213] In the embodiments of the present application, on the basis of determining the first transmission direction corresponding to the first time unit, when the terminal device receives a second DCI, the timing of the second DCI is limited, so that sufficient time is reserved for the terminal device to complete the scheduling transmission of each time unit before the start of the time unit, which reduces the complexity of processing of the terminal device, and the scheduling flexibility is increased by allowing the transmission direction corresponding to the transmission resource scheduled by the second DCI to be opposite to the first transmission direction corresponding to the first time unit.

[0214] Optionally, before the network device sends the first DCI to the terminal device, the method 200 further includes steps 201 and 202. Specifically as follows:

[0215] 201. The terminal device sends first capability information to the network device. Correspondingly, the network device receives the first capability information from the terminal device.

[0216] The first capability information is used to indicate the capability of the terminal device for switching between the first transmission direction and the second transmission direction. That is, the terminal device needs to first notify the network device whether the terminal device has the capability of switching between the uplink transmission direction and the downlink transmission direction. When the terminal device has the capability of switching between the uplink transmission direction and the downlink transmission direction, step 222 can be performed.

[0217] Optionally, the first capability information is used to indicate at least one of the following:

[0218] The capability of the terminal device for keeping the transmission direction unchanged in the first time unit;

[0219] the capability of the terminal device to switch between the first transmission direction and the second transmission direction at any position;

[0220] the capability of the terminal device to dynamically switch between the first transmission direction and the second transmission direction.

[0221] The capability of the terminal device to keep the transmission direction unchanged in the first time unit can be understood as that the terminal device keeps the transmission direction unchanged in the first time unit. For example, if the transmission direction corresponding to the first time unit is the uplink transmission direction, the terminal device only performs uplink transmission in the first time unit. Alternatively, it can be understood that the position at which the terminal device switches between the uplink transmission direction and the downlink transmission direction occurs at the end of the last symbol of the first time unit, or the position at which the terminal device switches between the uplink transmission direction and the downlink transmission direction occurs at the beginning of the first symbol of the first time unit.

[0222] The capability of the terminal device to switch between the first transmission direction and the second transmission direction at any position can be understood as that the terminal device can switch between the first transmission direction and the second transmission direction at any symbol or in any time unit. For example, the first time unit includes 14 symbols, and the terminal device switches between the first transmission direction and the second transmission direction at the end of the seventh symbol.

[0223] The capability of the terminal device to dynamically switch between the first transmission direction and the second transmission direction can be understood as that the transmission direction corresponding to the first time unit has been determined, but in practice, due to the need for communication, the transmission direction corresponding to the transmission resource scheduled by the DCI received by the terminal device is opposite to the transmission direction corresponding to the first time unit. For example, the first transmission direction corresponds to the downlink transmission direction, and the transmission direction corresponding to the transmission resource scheduled by the DCI is the uplink transmission direction (i.e., the transmission direction corresponding to the third transmission resource in the above). At this time, step 222 is performed to realize dynamic switching from the first transmission direction to the second transmission direction.

[0224] It should be noted that the capability of the terminal device to dynamically switch between the first transmission direction and the second transmission direction can also be the capability of the terminal device to switch from the transmission direction corresponding to the first transmission resource scheduled by the first DCI to the transmission direction corresponding to the third transmission resource scheduled by the second DCI.

[0225] As an example, when the terminal device has the capability of keeping the transmission direction unchanged in the first time unit, the terminal device with the capability only switches between the first transmission direction and the second transmission direction at the boundary of the first time unit. The terminal device without the capability can switch between the first transmission direction and the second transmission direction at any position, or dynamically switch between the first transmission direction and the second transmission direction.

[0226] As another example, when the terminal device has the capability of switching between the first transmission direction and the second transmission direction at any position, the terminal device with the capability switches between the first transmission direction and the second transmission direction at any position. The terminal device without the capability only switches between the first transmission direction and the second transmission direction at the boundary of the time unit, or dynamically switches between the first transmission direction and the second transmission direction.

[0227] As another example, when the terminal device has the capability of dynamically switching between the first transmission direction and the second transmission direction, the terminal device with the capability can dynamically switch between the first transmission direction and the second transmission direction, while the terminal device without the capability only switches between the first transmission direction and the second transmission direction at the boundary of the time unit, or switches between the first transmission direction and the second transmission direction at any position.

[0228] It should be noted that in the embodiments of the present application, the terminal device sends the first capability information to the terminal device, which can also be understood as the terminal device reporting the capability possessed by the terminal device to the network device through the first capability information.

[0229] It should be further noted that the first symbol of the first time unit and the first symbol occupied by the second transmission resource can be used as a reference point, where the reference point can be a first time point in a first period, the first period consists of N first time units, the first time point is located at the start position of the Pth first time unit, and the first time unit can be an OFDM symbol, a sub-slot, a slot, a micro-slot, etc. The first period and / or the first time point can be pre-defined by a protocol, or can be configured by the network device according to the capability reported by the terminal device, or reported by the terminal device, and N and P are positive integers.

[0230] 202. The network device generates the first DCI.

[0231] For example, the network device generates the first DCI before sending the first DCI to the terminal device. The detailed description of the first DCI is described with reference to steps 210 and 220, and will not be repeated here.

[0232] It should be noted that steps 201 and 202 have no sequence, and can be performed first, or performed first, or steps 201 and 202 occur at the same time, and the embodiments of the present application do not limit this.

[0233] Optionally, the first capability information is used to determine the number of switching occasions for switching between the first transmission direction and the second transmission direction of the terminal device in the first time unit or the period of the SBFD, and / or the position of the switching occasion for switching between the first transmission direction and the second transmission direction, the switching occasion corresponding to a symbol when switching from the first transmission direction to the second transmission direction.

[0234] As an example, the capability of the existing defined FG 5-1 or FG 5-1b can be used, that is, the number of switching occasions for switching between the uplink transmission direction and the downlink transmission direction for each first time unit containing SBFD symbols and / or flexible symbols is limited.

[0235] As another example, the number of switching occasions for switching between the uplink transmission direction and the downlink transmission direction is limited for each SBFD period. For example, in one SBFD period, the number of switching occasions for switching between the uplink transmission direction and the downlink transmission direction is limited to no more than T, T≥1 and is an integer.

[0236] Optionally, the position of the switching occasion for switching between the first transmission direction and the second transmission direction is the boundary of the first time unit; or the position of the switching occasion for switching between the first transmission direction and the second transmission direction is between the SBFD symbol and the non-SBFD symbol.

[0237] Wherein, the position of the switching occasion for switching between the first transmission direction and the second transmission direction is between the SBFD symbol and the non-SBFD symbol, which can be understood as the position of the end of the SBFD symbol or the beginning of the non-SBFD symbol when the SBFD symbol is converted to the non-SBFD symbol. Or it can be understood that the position of the end of the non-SBFD or the beginning of the SBFD when the non-SBFD is converted to the SBFD.

[0238] It should be noted that the terminal device switches between the first transmission direction and the second transmission direction, which can also be referred to as the terminal device switches between the uplink transmission direction and the downlink transmission direction.

[0239] By limiting the number and position of the switching occasion for switching between the first transmission direction and the second transmission direction in the first time unit containing the SBFD symbol and / or the flexible symbol through the first capability information, the flexibility of the SBFD system scheduling is ensured, and the transmission efficiency of the SBFD system is also ensured.

[0240] 230. The terminal device and the network device perform data transmission.

[0241] As an example, in a case that the terminal device receives the second DCI, the terminal device and the network device perform data transmission according to the first transmission direction. For example, the first transmission direction is uplink transmission, and the terminal device transmits data to the network device. For another example, the first transmission direction is downlink transmission, and the network device transmits data to the terminal device.

[0242] As another example, in a case that the terminal device receives the second DCI, the terminal device and the network device perform data transmission through the second transmission direction on the symbol occupied by the third transmission resource in the first time unit. That is, in the first time unit, the terminal device and the network device perform data transmission according to the second transmission direction on the symbol occupied by the third transmission resource. The terminal device and the network device perform data transmission according to the first transmission direction on the symbol other than the symbol occupied by the third transmission resource.

[0243] In the embodiment of the present application, the transmission direction corresponding to the transmission resource scheduled by the first DCI can determine the transmission direction corresponding to the first time unit, so that the transmission direction corresponding to the time unit in which the transmission resource scheduled by the first DCI is located can be determined by once DCI scheduling, and the time sequence limitation of the first DCI ensures that the terminal device has enough time to switch between uplink transmission and downlink transmission, thereby reducing the complexity of the terminal device.

[0244] As an example, FIG. 10 is a schematic diagram of another communication method 300 provided by the embodiment of the present application. For ease of description, the terminal device and the network device are taken as examples for exemplary description. The terminal device can be replaced by a terminal or a component (such as a chip or a chip system or a circuit or a communication module) of the terminal device, and the network device can be replaced by a component (such as a chip or a chip system or a circuit or a communication module) of the network device. In addition, the steps described below executed by a single execution subject can also be divided into execution by multiple execution subjects, which can be logically and / or physically separated. The method 300 shown in FIG. 10 can include the following steps.

[0245] 310. The network device sends semi-static configuration information to the terminal device. Correspondingly, the terminal device receives the semi-static configuration information from the network device.

[0246] The semi-static configuration information is used to indicate the fourth transmission resource. The fourth transmission resource is located in the first time unit, that is, the fourth transmission resource occupies at least one symbol of the plurality of symbols included in the first time unit.

[0247] For example, the transmission direction corresponding to the fourth transmission resource is an uplink transmission direction or a downlink transmission direction, that is, the transmission direction corresponding to the transmission resource configured by the semi-static configuration information is an uplink transmission direction or a downlink transmission direction.

[0248] It should be noted that in a possible implementation, the network device sends indication information to the terminal device, and the first transmission resource is indicated by the indication information. The indication information can be indication information dedicated to transmission direction indication, or can be transmission resource indication information. For example, the indication information is carried in radio resource control (RRC) signaling, medium access control-control element (MAC-CE) signaling, or DCI indication.

[0249] For details of the indication information and the first time unit, see step 210, which will not be repeated here.

[0250] 320、The terminal device determines a third transmission direction corresponding to the first time unit according to the transmission direction corresponding to the fourth transmission resource.

[0251] The first time unit includes a plurality of symbols, the fourth transmission resource occupies at least one symbol of the plurality of symbols included in the first time unit, and the third transmission direction includes one of an uplink transmission direction and a downlink transmission direction.

[0252] In this application, a plurality of semi-statically configured transmission resources in a first time unit are taken as an example for illustration. Optionally, the third transmission direction corresponding to the first time unit is determined according to the transmission direction corresponding to the fourth transmission resource, including:

[0253] When the interval between the first symbol occupied by the fourth transmission resource and the first symbol of the first time unit is the smallest, the third transmission direction is the same as the transmission direction corresponding to the fourth transmission resource; or

[0254] When the priority of the type of the fourth transmission resource is the highest, the third transmission direction is the same as the transmission direction corresponding to the fourth transmission resource, and the type of the fourth transmission resource includes a data transmission resource, a control transmission resource, and a reference signal transmission resource; or

[0255] When the priority of the fourth transmission resource is the highest, the third transmission direction is the same as the transmission direction corresponding to the fourth transmission resource; or

[0256] When the transmission corresponding to the fourth transmission resource is a non-first transmission in K times of repeated transmissions, and at least one transmission in the K times of repeated transmissions has been performed before the fourth transmission resource, the third transmission direction is the same as the transmission direction corresponding to the fourth transmission resource, K≥2 and is an integer.

[0257] As an example, the interval between the first symbol occupied by the fourth transmission resource and the first symbol of the first time unit is the smallest, which can be understood as that the first symbol occupied by the fourth transmission resource is the earliest among all the semi-statically configured transmission resources in the first time unit.

[0258] As another example, the third transmission direction is determined according to the transmission direction corresponding to the transmission resource of the highest priority among the types of transmission resources. For example, it is specified that the priority relationship of the types of transmission resources is that the priority of the data transmission resource is the highest, the priority of the reference signal transmission resource is the lowest, and the priority of the control transmission resource is between the priorities of the data transmission resource and the reference signal transmission resource. Therefore, the transmission direction of the semi-statically configured data transmission resource in the first time unit is taken as the third transmission direction corresponding to the first time unit. Further, if there is no semi-statically configured data transmission resource in the first time unit, the transmission direction of the semi-statically configured control transmission resource in the first time unit is taken as the third transmission direction corresponding to the first time unit. If there is neither semi-statically configured data transmission resource nor semi-statically configured control transmission resource in the first time unit, the transmission direction of the semi-statically configured reference signal transmission resource in the first time unit is taken as the third transmission direction corresponding to the first time unit.

[0259] In the embodiments of the present application, it is also specified that the priority relationship of the types of transmission resources is that the priority of the control transmission resource is the highest, the priority of the reference signal transmission resource is the lowest, and the priority of the data transmission resource is between the priorities of the control transmission resource and the reference signal transmission resource. Alternatively, the priority of the reference signal transmission resource is the highest, the priority of the data transmission resource is the lowest, and the priority of the control transmission resource is between the priorities of the reference signal transmission resource and the data transmission resource. The present application does not limit the priority relationship.

[0260] As another example, the third transmission direction corresponding to the first time unit is the transmission direction of the transmission resource of the highest priority among the semi-statically configured transmission resources in the first time unit. For example, the first time unit includes semi-statically configured transmission resource #1 and transmission resource #2, if the priority of the transmission resource #1 is higher than the priority of the transmission resource #2, the third transmission direction is the same as the transmission direction corresponding to the transmission resource #2.

[0261] As another example, assuming that in K times of repeated transmission, the (m-1)th transmission has been transmitted, and the mth transmission has not been transmitted, the third transmission direction corresponding to the first time unit is the same as the transmission direction of the mth transmission, m≥2 and is an integer.

[0262] It should be noted that the above-mentioned manner of determining the third transmission direction can be used jointly. For example, when the priority of the type of the fourth transmission resource is the highest, assuming that the priority of the data transmission resource is the highest, but there are both uplink data transmission resources and downlink data transmission resources in the semi-statically configured data transmission resources in the first time unit, at this time, the third transmission direction can be determined by judging which of the uplink data transmission resources and the downlink data transmission resources occupies the symbol interval closest to the first symbol of the first time unit. For example, the uplink data transmission resource occupies the symbol interval closest to the first symbol of the first time unit, and the third transmission direction is the transmission direction corresponding to the uplink data transmission resource. Alternatively, the priority of the uplink data transmission resource is higher than the priority of the downlink data transmission resource, and the third transmission direction is the uplink transmission direction.

[0263] Optionally, after the terminal device determines the third transmission direction corresponding to the first time unit, the terminal device receives another DCI, the transmission direction corresponding to the transmission resource scheduled by the DCI is different from the third transmission direction, at this time, the terminal device needs to switch the transmission direction. The specific steps are as follows:

[0264] 321、The network device sends a third DCI to the terminal device. Correspondingly, the terminal device receives the third DCI from the network device.

[0265] The third DCI is used to schedule a fifth transmission resource, the fifth transmission resource occupies at least one symbol in the plurality of symbols included in the first time unit, the fifth transmission resource corresponds to a fourth transmission direction, and the fourth transmission direction is different from the third transmission direction.

[0266] For example, the third transmission direction is the uplink transmission direction, at this time, the transmission direction corresponding to all symbols in the first time unit is the uplink transmission direction, when the terminal device receives the third DCI from the network device after receiving the semi-static configuration information, and the transmission direction corresponding to the fifth transmission resource scheduled by the third DCI is the downlink transmission direction, then the terminal device needs to switch the uplink transmission direction to the downlink transmission direction on the symbol occupied by the fifth transmission resource.

[0267] It should be noted that the fifth transmission resource occupies at least one symbol in the first time unit, which can be all symbols in the first time unit or part of the symbols in the first time unit. When the fifth transmission resource occupies all symbols in the first time unit, the terminal device needs to switch the transmission direction corresponding to all symbols in the first time unit from the third transmission direction to the fourth transmission direction. When the fifth transmission resource occupies part of the symbols in the first time unit, the terminal device needs to switch the transmission direction corresponding to the part of the symbols occupied by the fifth transmission resource from the third transmission direction to the fourth transmission direction.

[0268] 322、switching the transmission direction corresponding to the symbol occupied by the fifth transmission resource from the third transmission direction to the fourth transmission direction.

[0269] Optionally, the interval between the last symbol occupied by the third DCI and the first symbol of the first time unit is greater than or equal to a fourth preset value. That is, when the terminal device switches the transmission direction corresponding to the symbol occupied by the fifth transmission resource from the third transmission direction to the fourth transmission direction, according to the timing requirement satisfied by the third DCI, sufficient time is provided for the terminal device to switch between the uplink transmission direction and the downlink transmission direction, so as to ensure that the terminal device has sufficient time to switch when receiving the third DCI, and to ensure smooth transmission of data.

[0270] It should be noted that the interval between the symbol occupied by the third DCI and the symbol occupied by the transmission resource (i.e. the fifth transmission resource) scheduled by the third DCI also needs to meet the processing delay requirement. For example, when the third DCI is UL-DCI, the interval between the last symbol occupied by the third DCI and the first symbol occupied by the fifth transmission resource is greater than or equal to a third value.

[0271] It should also be noted that in the embodiments of the present application, switching the transmission direction corresponding to the symbol occupied by the fifth transmission resource from the third transmission direction to the fourth transmission direction can also be understood as determining the transmission direction corresponding to the symbol occupied by the fifth transmission resource from the third transmission direction and the fourth transmission direction to be the fourth transmission direction.

[0272] Referring to FIG. 11, as an example, FIG. 11 is a schematic diagram of third transmission direction switching provided by an embodiment of the present application. As shown in (a) of FIG. 11, the semi-statically configured transmission resource is CSI-RS, the third transmission direction corresponding to the first time unit is a downlink transmission direction, the transmission resource scheduled by the third DCI (i.e., UL-DCI) is PUSCH, and the transmission direction corresponding to the PUSCH is an uplink transmission direction. Therefore, the transmission direction corresponding to the PUSCH is opposite to the third transmission direction. At this time, in the first time unit, the terminal device switches the transmission direction corresponding to the symbol occupied by the PUSCH from the downlink transmission direction to the uplink transmission direction, and the interval between the last symbol occupied by the UL-DCI and the first symbol of the first time unit is greater than or equal to t0, i.e., the fourth preset value is t0. Meanwhile, the interval between the last symbol occupied by the UL-DCI and the first symbol occupied by the PUSCH is greater than or equal to t1, i.e., the third value is t1, where t0 and t1 are numbers greater than zero.

[0273] As shown in (b) of FIG. 11, the semi-statically configured transmission resource is CSI-PUCCH, the third transmission direction corresponding to the first time unit is an uplink transmission direction, the transmission resource scheduled by the third DCI (i.e., DL-DCI) is PDSCH, and the transmission direction corresponding to the PDSCH is a downlink transmission direction. Therefore, the transmission direction corresponding to the PDSCH is opposite to the third transmission direction. At this time, in the first time unit, the terminal device switches the transmission direction corresponding to the symbol occupied by the PDSCH from the uplink transmission direction to the downlink transmission direction, and the interval between the last symbol occupied by the DL-DCI and the first symbol of the first time unit is greater than or equal to t0, i.e., the fourth preset value is t0, where t0 and t1 are numbers greater than zero. Meanwhile, the first symbol occupied by the DL-DCI is before the first symbol occupied by the PDSCH; or the first symbol occupied by the DL-DCI is the same as the first symbol occupied by the PDSCH.

[0274] As an implementation manner, in a case that the transmission direction corresponding to the fourth transmission resource is same as the third transmission direction, there is no limit on the interval between the last symbol occupied by the third DCI and the first symbol of the first time unit, i.e., there is no timing requirement on the interval between the last symbol occupied by the third DCI and the first symbol of the first time unit. However, the interval between the symbol occupied by the third DCI and the symbol occupied by the fifth transmission resource scheduled by the third DCI needs to meet the processing delay requirement. For example, when the third DCI is UL-DCI, the interval between the last symbol occupied by the UL-DCI and the first symbol of the PUSCH scheduled by the UL-DCI is greater than or equal to a third value. For another example, when the third DCI is DL-DCI, the first symbol occupied by the DL-DCI is before the first symbol of the PDSCH scheduled by the DL-DCI; or the first symbol occupied by the DL-DCI is same as the first symbol of the PDSCH scheduled by the DL-DCI.

[0275] It should be noted that, in the embodiments of the present application, the third transmission direction corresponding to the first time unit can also be referred to as the default transmission direction of the terminal device in the first time unit.

[0276] In the embodiments of the present application, on the basis of determining the third transmission direction corresponding to the first time unit, when the terminal device receives a third DCI, the timing of the third DCI is limited, so that sufficient time is reserved for the terminal device to complete the scheduled transmission of each time unit before the start of the time unit, which reduces the complexity of processing of the terminal device, and the scheduling flexibility is increased by allowing the transmission direction corresponding to the transmission resource scheduled by the third DCI to be opposite to the third transmission direction corresponding to the first time unit.

[0277] Optionally, before the network device sends the semi-static configuration information to the terminal device, the method 300 further includes steps 301 and 302. Specifically as follows:

[0278] 301. The terminal device sends second capability information to the network device. Correspondingly, the network device receives the second capability information from the terminal device.

[0279] The second capability information is used to indicate the capability of the terminal device for switching between the third transmission direction and the fourth transmission direction. That is, the terminal device needs to first inform the network device whether the terminal device has the capability of switching between the uplink transmission direction and the downlink transmission direction. When the terminal device has the capability of switching between the uplink transmission direction and the downlink transmission direction, step 322 can be performed.

[0280] Optionally, the second capability information is used to indicate at least one of the following:

[0281] the capability of the terminal device to keep the transmission direction unchanged in the first time unit;

[0282] the capability of the terminal device to switch between the third transmission direction and the fourth transmission direction at any position;

[0283] the capability of the terminal device to dynamically switch between the third transmission direction and the fourth transmission direction.

[0284] The detailed description of the capability of the terminal device to keep the transmission direction unchanged in the first time unit can be referred to step 201, which will not be repeated here.

[0285] The capability of the terminal device to switch between the third transmission direction and the fourth transmission direction at any position can be understood as that the terminal device can switch between the third transmission direction and the fourth transmission direction at any symbol or in any time unit. For example, the first time unit includes 14 symbols, and the terminal device switches between the third transmission direction and the fourth transmission direction at the end of the 7th symbol.

[0286] The capability of the terminal device to dynamically switch between the third transmission direction and the fourth transmission direction can be understood as that the corresponding transmission direction of the terminal device in the first time unit has been determined, but in practice, due to the need of communication, the transmission direction corresponding to the transmission resource scheduled by the DCI received by the terminal device is opposite to the transmission direction corresponding to the first time unit. For example, the third transmission direction is the uplink transmission direction, and the transmission direction corresponding to the transmission resource scheduled by the DCI is the downlink transmission direction (i.e., the transmission direction corresponding to the fifth transmission resource in the above), at this time, step 322 is executed to realize the dynamic switching from the third transmission direction to the fourth transmission direction.

[0287] It should be noted that the capability of the terminal device to dynamically switch between the third transmission direction and the fourth transmission direction can also be the capability of the terminal device to switch from the transmission direction corresponding to the fourth transmission resource configured semi-statically to the transmission direction corresponding to the fifth transmission resource scheduled by the third DCI.

[0288] As an example, when the terminal device has the capability of keeping the transmission direction unchanged in the first time unit, the terminal device with this capability only switches between the uplink transmission direction and the downlink transmission direction at the boundary of the first time unit. The terminal device without this capability can switch between the uplink transmission direction and the downlink transmission direction at any position, or dynamically switch between the uplink transmission direction and the downlink transmission direction.

[0289] As another example, when the terminal device has the capability of switching between the third transmission direction and the fourth transmission direction at any position, the terminal device having the capability switches between the third transmission direction and the fourth transmission direction at any position. The terminal device without the capability only switches between the third transmission direction and the fourth transmission direction at the boundary of the time unit, or dynamically switches between the third transmission direction and the fourth transmission direction.

[0290] As another example, when the terminal device has the capability of dynamically switching between the third transmission direction and the fourth transmission direction, the terminal device having the capability can dynamically switch between the third transmission direction and the fourth transmission direction, while the terminal device without the capability only switches between the third transmission direction and the fourth transmission direction at the boundary of the time unit, or switches between the third transmission direction and the fourth transmission direction at any position.

[0291] It should be noted that in the embodiment of the present application, the terminal device sends the second capability information to the terminal device, which can also be understood as that the terminal device reports the capability possessed by the terminal device to the network device through the second capability information.

[0292] 302. The network device generates the semi-static configuration information.

[0293] For example, the network device generates the semi-static configuration information before sending the semi-static configuration information to the terminal device. For details of the semi-static configuration information, see step 310, which will not be described here.

[0294] It should be noted that steps 301 and 302 have no sequence, which can be performed first, or performed first, or steps 301 and 302 occur at the same time, and the embodiment of the present application does not limit this.

[0295] Optionally, the second capability information is used to determine the number of switching occasions of switching between the third transmission direction and the fourth transmission direction of the terminal device in the first time unit or the period of SBFD, and / or the position of the switching occasion of switching between the third transmission direction and the fourth transmission direction. The switching occasion corresponds to the symbol of switching from the third transmission direction to the fourth transmission direction.

[0296] As an example, the capability of the existing defined FG 5-1 or FG 5-1b can be used, that is, the number of switching occasions of switching between the uplink transmission direction and the downlink transmission direction for each first time unit containing SBFD symbol and / or flexible symbol is limited.

[0297] As another example, a number limit of switching occasions for switching between the uplink transmission direction and the downlink transmission direction per SBFD period. For example, the number of switching occasions for switching between the uplink transmission direction and the downlink transmission direction is limited to no more than T, T is an integer and T≥1, within one SBFD period.

[0298] Optionally, the position of the switching occasion for switching between the third transmission direction and the fourth transmission direction is a boundary of the first time unit; or the position of the switching occasion for switching between the third transmission direction and the fourth transmission direction is between the SBFD symbol and the non-SBFD symbol.

[0299] Optionally, the position of the switching occasion for switching between the third transmission direction and the fourth transmission direction is between the SBFD symbol and the non-SBFD symbol, which can be understood as the position of the end of the SBFD symbol or the position of the beginning of the non-SBFD symbol when the SBFD symbol is converted into the non-SBFD symbol. Or it can be understood as the position of the end of the non-SBFD symbol or the position of the beginning of the SBFD symbol when the non-SBFD symbol is converted into the SBFD symbol.

[0300] It should be noted that the terminal device switches between the third transmission direction and the fourth transmission direction, which can also be referred to as the terminal device switching between the uplink transmission direction and the downlink transmission direction.

[0301] When the semi-static configuration information includes the SBFD configuration information, by limiting the number and position of the switching occasion for switching between the uplink transmission direction and the downlink transmission direction within the first time unit including the SBFD symbol and / or the flexible symbol, the flexibility of the SBFD system scheduling is ensured, and the transmission efficiency of the SBFD system is also ensured.

[0302] 330, the terminal device and the network device perform data transmission.

[0303] As an example, in the case that the terminal device receives the third DCI, the terminal device and the network device perform data transmission through the third transmission direction. For example, the third transmission direction is the uplink transmission, and the terminal device sends data to the network device; for another example, the third transmission direction is the downlink transmission, and the network device sends data to the terminal device.

[0304] As another example, in the case that the terminal device receives the third DCI, the terminal device and the network device perform data transmission through the fourth transmission direction on the symbol occupied by the fifth transmission resource. That is, within the first time unit, the terminal device and the network device perform data transmission according to the fourth transmission direction on the symbol occupied by the fifth transmission resource. On the symbol other than the symbol occupied by the fifth transmission resource, the terminal device and the network device perform data transmission according to the third transmission direction.

[0305] In the embodiment of the present application, the transmission direction corresponding to the first time unit can be determined through the transmission direction corresponding to the semi-statically configured transmission resource, so that the transmission direction corresponding to the time unit in which the semi-statically configured transmission resource is located can be determined, and further, the sufficient time for the terminal device to switch between uplink transmission and downlink transmission is ensured through the timing restriction on the third DCI, thereby reducing the complexity of the terminal device processing.

[0306] Referring to FIG. 12, FIG. 12 is a schematic diagram of another communication method 400 provided by the embodiments of the present application as an example. For ease of description, the terminal device and the network device are exemplarily described below. The terminal device can be replaced by a terminal or a component (such as a chip or a chip system or a circuit or a communication module) of the terminal device, and the network device can be replaced by a component (such as a chip or a chip system or a circuit or a communication module) of the network device. In addition, the steps described below as executed by a single execution subject can also be divided into execution by multiple execution subjects, which can be logically and / or physically separated. The method 400 shown in FIG. 12 can include the following steps.

[0307] 410. The network device sends first indication information to the terminal device. Accordingly, the terminal device receives the first indication information from the network device.

[0308] Optionally, the terminal device receives the first indication information at the first time, and the first indication information is used to indicate a fifth transmission direction corresponding to a sixth transmission resource, the fifth transmission direction including one of an uplink transmission direction and a downlink transmission direction, and the sixth transmission resource occupying at least one symbol in the plurality of symbols included in the first time unit.

[0309] Exemplarily, the first indication information can be indication information dedicated to transmission direction indication, or can be transmission resource indication information. For example, the indication information is carried in radio resource control (RRC) signaling, medium access control-control element (MAC-CE) signaling, or DCI indication.

[0310] As an example, when the first indication information is indication information dedicated to transmission direction indication, the first indication information can be carried in existing TDD configuration signaling, or can be carried in SBFD configuration signaling, or can be carried in other newly added configuration signaling for indicating the uplink transmission direction and the downlink transmission direction.

[0311] As another example, when the first indication information is transmission resource indication information, the transmission resource includes uplink transmission resource and downlink transmission resource, and the transmission resource is used for transmission of at least one of data, control information, broadcast information, random access information, transmission reference signal, transmission synchronization signal.

[0312] It should be noted that the sixth transmission resource can be a transmission resource scheduled by dynamic scheduling DCI, or a semi-statically configured transmission resource, which is not limited in the present application.

[0313] 420、The network device sends the fourth downlink control information to the terminal device. Correspondingly, the terminal device receives the fourth downlink control information from the network device.

[0314] For ease of description, the fourth downlink control information is taken as the fourth DCI for description below.

[0315] Optionally, the terminal device receives the fourth DCI at the second time, the fourth DCI being used for scheduling a seventh transmission resource, the seventh transmission resource corresponding to a sixth transmission direction, the sixth transmission direction being different from the fifth transmission direction, the seventh transmission resource occupying at least one symbol in the plurality of symbols included in the first time unit, the seventh transmission resource being different from the symbol occupied by the sixth transmission resource.

[0316] It should be noted that the first time and the second time can be the same time, that is, the time of issuing the first indication information and the fourth DCI is the same time, or the time of receiving the first indication information and the fourth DCI by the terminal device is the same. The first time and the second time can also be different times, that is, the time of issuing the first indication information and the fourth DCI is different, or the time of receiving the first indication information and the fourth DCI by the terminal device is different, at this time, the first time is before the second time, that is, the transmission corresponding to the sixth transmission resource occurs before the transmission corresponding to the seventh transmission resource, or it can be understood that the transmission corresponding to the sixth transmission resource is the previous transmission of the transmission corresponding to the seventh transmission resource.

[0317] It should also be noted that the seventh transmission resource is different from the symbol occupied by the sixth transmission resource, so the transmission direction corresponding to the sixth transmission resource is different from the transmission direction corresponding to the seventh transmission resource, that is, the fifth transmission direction is different from the sixth transmission direction, at this time, the terminal device needs to switch from the fifth transmission direction to the sixth transmission direction. For example, the fifth transmission direction is the uplink transmission direction, and the sixth transmission direction is the downlink transmission direction, so the terminal device needs to switch from the uplink transmission direction to the downlink transmission direction when performing data transmission.

[0318] As a possible implementation, the seventh transmission resource can also occupy the same symbol as the sixth transmission resource, and in this case, the terminal device switches the transmission direction corresponding to the symbol occupied by the seventh transmission resource or the sixth transmission resource from the fifth transmission direction to the sixth transmission direction.

[0319] Optionally, the interval between the last symbol occupied by the fourth DCI and the first symbol occupied by the sixth transmission resource is greater than or equal to a fifth preset value, or the interval between the last symbol occupied by the fourth DCI and the first symbol of the first time unit is greater than or equal to a sixth preset value.

[0320] It should be noted that the interval between the symbol occupied by the fourth DCI and the symbol occupied by the transmission resource (i.e., the seventh transmission resource) scheduled by the fourth DCI also needs to meet the processing delay requirement. For example, when the fourth DCI is UL-DCI, the interval between the last symbol occupied by the fourth DCI and the first symbol occupied by the fifth transmission resource is greater than or equal to a fourth value.

[0321] Referring to FIG. 13, as an example, FIG. 13 is a schematic diagram of a requirement met by the fourth DCI according to an embodiment of the present application. As shown in FIG. 13(a), the transmission direction corresponding to the sixth transmission resource is an uplink transmission direction or a downlink transmission direction. For example, the transmission direction corresponding to the sixth transmission resource is a downlink transmission direction (i.e., DL on the left side in FIG. 13(a)), in this case, the fourth DCI is UL-DCI, the transmission resource scheduled by the UL-DCI is PUSCH, the transmission direction corresponding to the PUSCH is an uplink transmission direction, and thus the interval between the last symbol occupied by the UL-DCI and the first symbol occupied by the sixth transmission resource is greater than or equal to t0, i.e., the fifth preset value is t0. Meanwhile, the interval between the last symbol occupied by the UL-DCI and the first symbol occupied by the transmission resource (i.e., PUSCH) scheduled by the UL-DCI is greater than or equal to t1, i.e., the fourth value is t1. For another example, the transmission direction corresponding to the sixth transmission resource is an uplink transmission direction (i.e., UL on the right side in FIG. 13(a)), in this case, the fourth DCI is DL-DCI, the transmission resource scheduled by the DL-DCI is PDSCH, the transmission direction corresponding to the PDSCH is a downlink transmission direction, and thus the interval between the last symbol occupied by the DL-DCI and the first symbol occupied by the sixth transmission resource is greater than or equal to t0, i.e., the fifth preset value is t0. Meanwhile, the first symbol occupied by the DL-DCI is before the first symbol occupied by the PDSCH, or the first symbol occupied by the DL-DCI is the same as the first symbol occupied by the PDSCH.

[0322] As shown in FIG. 13(b), the transmission direction corresponding to the sixth transmission resource is an uplink transmission direction or a downlink transmission direction. For example, the transmission direction corresponding to the sixth transmission resource is a downlink transmission direction (i.e., DL on the left in FIG. 13(b)), at this time, the fourth DCI is UL-DCI, the transmission resource scheduled by the UL-DCI is PUSCH, and the transmission direction corresponding to the PUSCH is an uplink transmission direction. Therefore, the interval between the last symbol occupied by the UL-DCI and the first symbol of the first time unit is greater than or equal to t0, that is, the sixth preset value is t0. Meanwhile, the interval between the last symbol occupied by the UL-DCI and the first symbol of the transmission resource (PUSCH) scheduled by the UL-DCI is greater than or equal to t1, that is, the fourth value is t1. For another example, the transmission direction corresponding to the sixth transmission resource is an uplink transmission direction (i.e., UL on the right in FIG. 13(b)), at this time, the fourth DCI is DL-DCI, the transmission resource scheduled by the DL-DCI is PDSCH, and the transmission direction corresponding to the PDSCH is a downlink transmission direction. Therefore, the interval between the last symbol occupied by the DL-DCI and the first symbol of the first time unit is greater than or equal to t0, that is, the sixth preset value is t0. Meanwhile, the first symbol occupied by the DL-DCI is before the first symbol of the PDSCH; or the first symbol occupied by the DL-DCI is the same as the first symbol of the PDSCH. As shown in FIG. 13(c), the transmission direction corresponding to the sixth transmission resource is an uplink transmission direction or a downlink transmission direction. For example, the transmission direction corresponding to the sixth transmission resource is a downlink transmission direction (i.e., DL on the left in FIG. 13(c)), at this time, the fourth DCI is UL-DCI, the transmission resource scheduled by the UL-DCI is PUSCH, and the transmission direction corresponding to the PUSCH is an uplink transmission direction. Therefore, the interval between the last symbol occupied by the UL-DCI and the last symbol of the sixth transmission resource is greater than or equal to t0, that is, the fifth preset value is t0. Meanwhile, the interval between the last symbol occupied by the UL-DCI and the first symbol of the transmission resource (PUSCH) scheduled by the UL-DCI is greater than or equal to t1, that is, the fourth value is t1. For another example, the transmission direction corresponding to the sixth transmission resource is an uplink transmission direction (i.e., UL on the right in FIG. 13(c)), at this time, the fourth DCI is DL-DCI, the transmission resource scheduled by the DL-DCI is PDSCH, and the transmission direction corresponding to the PDSCH is a downlink transmission direction. Therefore, the interval between the last symbol occupied by the DL-DCI and the last symbol of the sixth transmission resource is greater than or equal to t0, that is, the fifth preset value is t0. Meanwhile, the first symbol occupied by the DL-DCI is before the first symbol of the PDSCH; or the first symbol occupied by the DL-DCI is the same as the first symbol of the PDSCH.

[0323] In the embodiments of the present application, the sixth transmission resource and the seventh transmission resource occupy part of the plurality of symbols included in the first time unit.

[0324] Optionally, before the network device transmits the fourth DCI, the method 400 further includes step 411, specifically as follows:

[0325] 411. The network device generates the fourth DCI.

[0326] For example, the network device generates the fourth DCI before transmitting the fourth DCI to the terminal device. For details of the fourth DCI, see step 420, which is not repeated here.

[0327] 430. Switch the transmission direction from the fifth transmission direction to the sixth transmission direction.

[0328] For example, the fifth transmission direction corresponding to the sixth transmission resource is the uplink transmission direction, and the sixth transmission direction corresponding to the seventh transmission resource is the downlink transmission direction. Therefore, the terminal device needs to switch from the uplink transmission direction to the downlink transmission direction to use the current transmission resource for data transmission.

[0329] It should be noted that if the terminal device receives the semi-static configuration information in the first time unit, the interval between the semi-statically configured transmission resource and the sixth transmission resource or the first time unit has no limit. Alternatively, the terminal device and the network device can use the semi-statically configured transmission resource for data transmission in the first time unit.

[0330] It should be further noted that in the embodiments of the present application, switching the fifth transmission direction to the sixth transmission direction can also be understood as determining the transmission direction corresponding to the symbol occupied by the seventh transmission resource from the fifth transmission direction and the sixth transmission direction as the sixth transmission direction.

[0331] Optionally, before the network device transmits the first indication information to the terminal device, the method 400 further includes step 401. Specifically as follows:

[0332] 401. The terminal device transmits third capability information to the network device. Correspondingly, the network device receives the third capability information from the terminal device.

[0333] The third capability information is used to indicate the capability of the terminal device for switching between the fifth transmission direction and the sixth transmission direction. That is, the terminal device needs to inform the network device whether it has the capability of switching between the uplink transmission direction and the downlink transmission direction. When the terminal device has the capability of switching between the uplink transmission direction and the downlink transmission direction, step 430 can be performed.

[0334] Optionally, the third capability information is used to indicate at least one of the following:

[0335] the capability of the terminal device to keep the transmission direction unchanged in the first time unit;

[0336] the capability of the terminal device to switch between the fifth transmission direction and the sixth transmission direction at any position;

[0337] the capability of the terminal device to dynamically switch between the fifth transmission direction and the sixth transmission direction.

[0338] For detailed description of the capability of the terminal device to keep the transmission direction unchanged in the first time unit, see step 201, which will not be repeated here.

[0339] The capability of the terminal device to switch between the fifth transmission direction and the sixth transmission direction at any position can be understood as that the terminal device can switch between the fifth transmission direction and the sixth transmission direction at any symbol or in any time unit. For example, the first time unit includes 14 symbols, and the terminal device switches between the fifth transmission direction and the sixth transmission direction at the end of the 7th symbol.

[0340] The capability of the terminal device to dynamically switch between the fifth transmission direction and the sixth transmission direction can be understood as that after receiving the first indication information, the terminal device acquires the sixth transmission resource, thereby knowing the transmission direction corresponding to the symbol occupied by the sixth transmission resource, for example, the fifth transmission direction. Thereafter, the terminal device receives the fourth DCI, and the transmission direction corresponding to the seventh transmission resource scheduled by the fourth DCI (i.e., the sixth transmission direction) is different from the fifth transmission direction, that is, the transmission direction corresponding to the symbol occupied by the seventh transmission resource is the sixth transmission direction. The terminal device needs to switch the transmission direction, and performs step 430 to realize dynamic switching from the fifth transmission direction to the sixth transmission direction.

[0341] It should be noted that the capability of the terminal device to dynamically switch between the fifth transmission direction and the sixth transmission direction can also be the capability of the terminal device to switch from the transmission direction corresponding to the sixth transmission resource to the transmission direction corresponding to the seventh transmission resource scheduled by the fourth DCI.

[0342] As an example, when the terminal device has the capability of keeping the transmission direction unchanged in the first time unit, the terminal device having the capability only switches between the uplink transmission direction and the downlink transmission direction at the boundary of the first time unit. The terminal device without the capability can dynamically switch between the uplink transmission direction and the downlink transmission direction, or dynamically switch between the fifth transmission direction and the sixth transmission direction.

[0343] As another example, when the terminal device has the capability of switching between the fifth transmission direction and the sixth transmission direction at any position, the terminal device having the capability switches between the fifth transmission direction and the sixth transmission direction at any position. The terminal device not having the capability only switches between the fifth transmission direction and the sixth transmission direction at the boundary of the time unit, or dynamically switches between the fifth transmission direction and the sixth transmission direction.

[0344] As another example, when the terminal device has the capability of dynamically switching between the fifth transmission direction and the sixth transmission direction, the terminal device having the capability can dynamically switch between the fifth transmission direction and the sixth transmission direction, and the terminal device not having the capability only switches between the fifth transmission direction and the sixth transmission direction at the boundary of the time unit, or dynamically switches between the fifth transmission direction and the sixth transmission direction.

[0345] It should be noted that, in the embodiment of the present application, the terminal device sends the third capability information to the terminal device, which can also be understood as that the terminal device reports the capability possessed by the terminal device to the network device through the third capability information.

[0346] Optionally, the third capability information is used to determine the number of switching occasions of switching between the fifth transmission direction and the sixth transmission direction of the terminal device in the first time unit or the period of SBFD, and / or the position of the switching occasion of switching between the fifth transmission direction and the sixth transmission direction, the switching occasion being a symbol corresponding to switching from the fifth transmission direction to the sixth transmission direction.

[0347] As an example, the capability of the existing FG 5-1 or FG 5-1b can be used, that is, the number of switching occasions of switching between the uplink transmission direction and the downlink transmission direction for each first time unit containing SBFD symbols and / or flexible symbols is limited.

[0348] As another example, the number of switching occasions of switching between the uplink transmission direction and the downlink transmission direction for each SBFD period is limited. For example, in one SBFD period, the number of switching occasions of switching between the uplink transmission direction and the downlink transmission direction is limited to not more than T, T≥1 and is an integer.

[0349] Optionally, the position of the switching occasion of switching between the fifth transmission direction and the sixth transmission direction is the boundary of the first time unit; or the position of the switching occasion of switching between the fifth transmission direction and the sixth transmission direction is between the SBFD symbol and the non-SBFD symbol.

[0350] The position of the switching timing between the fifth transmission direction and the sixth transmission direction is between the SBFD symbol and the non-SBFD symbol. It can be understood that the position of the end of the SBFD symbol or the start of the non-SBFD symbol when the SBFD symbol is converted into the non-SBFD symbol. Or it can be understood that the position of the end of the non-SBFD symbol or the start of the SBFD symbol when the non-SBFD symbol is converted into the SBFD symbol.

[0351] It should be noted that the terminal device switches between the fifth transmission direction and the sixth transmission direction, which can also be referred to as the terminal device switching between the uplink transmission direction and the downlink transmission direction.

[0352] When the first indication information includes the SBFD configuration information, by limiting the number and position of the switching timing between the uplink transmission direction and the downlink transmission direction in the first time unit including the SBFD symbol and / or the flexible symbol, the flexibility of the SBFD system scheduling is ensured, and the transmission efficiency of the SBFD system is also ensured.

[0353] 440, the terminal device and the network device perform data transmission.

[0354] As an example, before the terminal device switches the transmission direction, the terminal device and the network device perform data transmission according to the fifth transmission direction on the symbol occupied by the sixth transmission resource. For example, the fifth transmission direction is uplink transmission, and the terminal device sends data to the network device; for another example, the fifth transmission direction is downlink transmission, and the network device sends data to the terminal device.

[0355] As another example, after the terminal device switches the transmission direction from the fifth transmission direction to the sixth transmission direction, the terminal device and the network device perform data transmission according to the sixth transmission direction on the symbol occupied by the seventh transmission resource. For example, the sixth transmission direction is uplink transmission, and the terminal device sends data to the network device; for another example, the sixth transmission direction is downlink transmission, and the network device sends data to the terminal device.

[0356] In the embodiment of the present application, by taking the transmission direction corresponding to the sixth transmission resource indicated by the first indication information as a reference, in the case that the transmission direction corresponding to the transmission resource scheduled by the dynamic scheduling DCI is opposite to the transmission direction corresponding to the sixth transmission resource, the terminal device has enough time to switch between the uplink transmission and the downlink transmission, thereby reducing the complexity of the terminal device processing.

[0357] Referring to FIG. 14, as an example, FIG. 14 is a schematic diagram of another communication method 500 provided by the embodiments of the present application. For ease of description, the terminal device and the network device are taken as examples for exemplary description. The terminal device can be replaced by a terminal or a component (for example, a chip or a chip system or a circuit or a communication module) of the terminal device, and the network device can be replaced by a component (for example, a chip or a chip system or a circuit or a communication module) of the network device. In addition, the steps described below as executed by a single execution subject can also be divided into execution by multiple execution subjects, which can be logically and / or physically separated. The method 500 shown in FIG. 14 can include the following steps.

[0358] 510. The network device sends second indication information to the terminal device. Accordingly, the terminal device receives the second indication information from the network device.

[0359] The second indication information is used to indicate a seventh transmission direction corresponding to a first time unit, the first time unit includes a plurality of symbols, and the seventh transmission direction includes one of an uplink transmission direction and a downlink transmission direction.

[0360] For example, the second indication information can be indication information dedicated to transmission direction indication, or can be transmission resource indication information. For example, the indication information is carried in radio resource control (RRC) signaling, medium access control-control element (MAC-CE) signaling, or DCI indication.

[0361] As an example, when the second indication information is indication information dedicated to transmission direction indication, the second indication information can be carried in existing TDD configuration signaling, or can be carried in SBFD configuration signaling, or can be carried in other newly added configuration signaling for indicating the uplink transmission direction and the downlink transmission direction.

[0362] As another example, when the second indication information is transmission resource indication information, the transmission resource includes uplink transmission resource and downlink transmission resource, and the transmission resource is used for at least one of transmission of data, transmission of control information, transmission of broadcast information, transmission of random access information, transmission of reference signals, and transmission of synchronization signals.

[0363] 520. The network device sends fifth downlink control information to the terminal device. Accordingly, the terminal device receives the fifth downlink control information from the network device.

[0364] For ease of description, the fifth downlink control information is taken as an example of the fifth DCI for description below.

[0365] The fifth DCI is used for scheduling an eighth transmission resource, the eighth transmission resource occupies at least one symbol in a plurality of symbols included in the first time unit, the eighth transmission resource corresponds to an eighth transmission direction, and the eighth transmission direction is different from the seventh transmission direction.

[0366] It should be noted that the time when the network device sends the second indication information and the time when the network device sends the fifth DCI can be the same or different, or the time when the terminal device receives the second indication information and the time when the terminal device receives the fifth DCI can be the same or different, which is not limited in the present application.

[0367] Hereinafter, the time when the network device sends the second indication information is before the time when the network device sends the fifth DCI.

[0368] For example, the seventh transmission direction is an uplink transmission direction, at this time, the transmission direction corresponding to all symbols in the first time unit is the uplink transmission direction, when the fifth DCI is received, and the transmission direction corresponding to the eighth transmission resource scheduled by the fifth DCI is a downlink transmission direction, then the terminal device needs to switch the uplink transmission direction to the downlink transmission direction on the symbol occupied by the eighth transmission resource.

[0369] It should be noted that the eighth transmission resource occupies at least one symbol in the plurality of symbols included in the first time unit, which can be that the eighth transmission resource occupies all symbols in the first time unit, or that the eighth transmission resource occupies part of the plurality of symbols included in the first time unit. When the eighth transmission resource occupies all symbols in the first time unit, the terminal device needs to switch the transmission direction corresponding to all symbols in the first time unit from the seventh transmission direction to the eighth transmission direction. When the eighth transmission resource occupies part of the plurality of symbols included in the first time unit, the terminal device needs to switch the transmission direction corresponding to the part of symbols occupied by the eighth transmission resource from the seventh transmission direction to the eighth transmission direction.

[0370] Optionally, before the network device sends the fifth DCI, the method 500 further includes step 511, specifically as follows:

[0371] 511. The network device generates the fifth DCI.

[0372] For example, the network device generates the fifth DCI before sending the fifth DCI to the terminal device. For details of the fifth DCI, see step 520, which is not repeated here.

[0373] 530. Switch the transmission direction corresponding to the symbol occupied by the eighth transmission resource from the seventh transmission direction to the eighth transmission direction.

[0374] Optionally, the interval between the last symbol occupied by the fifth DCI and the first symbol of the first time unit is greater than or equal to a seventh preset value. That is, when the terminal device switches the transmission direction corresponding to the symbol occupied by the eighth transmission resource from the seventh transmission direction to the eighth transmission direction, according to the timing requirement met by the fifth DCI, sufficient time is provided for the terminal device to switch between the uplink transmission direction and the downlink transmission direction, so as to ensure that the terminal device has sufficient time to switch when receiving the fifth DCI, and to ensure smooth transmission of data.

[0375] It should be noted that the interval between the symbol occupied by the fifth DCI and the symbol occupied by the transmission resource (i.e., the eighth transmission resource) scheduled by the fifth DCI also needs to meet the processing delay requirement. For example, when the fifth DCI is UL-DCI, the interval between the last symbol occupied by the fifth DCI and the first symbol occupied by the eighth transmission resource is greater than or equal to a fifth value.

[0376] It should also be noted that in the embodiments of the present application, switching the transmission direction corresponding to the symbol occupied by the eighth transmission resource from the seventh transmission direction to the eighth transmission direction can also be understood as determining the transmission direction corresponding to the symbol occupied by the eighth transmission resource from the seventh transmission direction and the eighth transmission direction to be the eighth transmission direction.

[0377] Referring to FIG. 15, as an example, FIG. 15 is a schematic diagram of a requirement met by the fifth DCI provided in an embodiment of the present application. As shown in (a) of FIG. 15, the seventh transmission direction corresponding to the first time unit is a downlink transmission direction, the transmission resource scheduled by the fifth DCI (i.e., UL-DCI) is PUSCH, and the transmission direction corresponding to the PUSCH is an uplink transmission direction. Therefore, the transmission direction corresponding to the PUSCH is opposite to the seventh transmission direction. At this time, in the first time unit, the terminal device switches the transmission direction corresponding to the symbol occupied by the PUSCH from the downlink transmission direction to the uplink transmission direction, and the interval between the last symbol occupied by the UL-DCI and the first symbol of the first time unit is greater than or equal to t0, i.e., the seventh preset value is t0. At the same time, the interval between the last symbol occupied by the UL-DCI and the first symbol occupied by the PUSCH is greater than or equal to t1, i.e., the fifth value is t1.

[0378] As shown in Figure 15 (b), the seventh transmission direction corresponding to the first time unit is an uplink transmission direction, the transmission resource scheduled by the fifth DCI (i.e., the DL-DCI) is a PDSCH, and the transmission direction corresponding to the PDSCH is a downlink transmission direction. Therefore, the transmission direction corresponding to the PDSCH is opposite to the seventh transmission direction. At this time, in the first time unit, the terminal device switches the transmission direction corresponding to the symbol occupied by the PDSCH from the uplink transmission direction to the downlink transmission direction, and the interval between the last symbol occupied by the DL-DCI and the first symbol of the first time unit is greater than or equal to t0, i.e., the seventh preset value is t0. At the same time, the first symbol occupied by the DL-DCI is before the first symbol occupied by the PDSCH; or the first symbol occupied by the DL-DCI is the same as the first symbol occupied by the PDSCH.

[0379] As an implementation manner, in the case that the transmission direction corresponding to the eighth transmission resource is the same as the seventh transmission direction, the interval between the last symbol occupied by the fifth DCI and the first symbol of the first time unit is not limited, i.e., the interval between the last symbol occupied by the fifth DCI and the first symbol of the first time unit has no timing requirement. However, the interval between the symbol occupied by the fifth DCI and the symbol occupied by the eighth transmission resource needs to meet the processing delay requirement. For example, when the fifth DCI is an UL-DCI, the interval between the last symbol occupied by the UL-DCI and the first symbol occupied by the PUSCH scheduled by the UL-DCI is greater than or equal to the fifth value. For another example, when the fifth DCI is a DL-DCI, the first symbol occupied by the DL-DCI is before the first symbol occupied by the PDSCH scheduled by the DL-DCI; or the first symbol occupied by the DL-DCI is the same as the first symbol occupied by the PDSCH scheduled by the DL-DCI.

[0380] It should be noted that in the embodiments of the present application, the seventh transmission direction corresponding to the first time unit can also be referred to as the default transmission direction of the terminal device in the first time unit.

[0381] Optionally, before the network device sends the second indication information to the terminal device, the method 500 further includes step 501. Specifically as follows:

[0382] 501. The terminal device sends the fourth capability information to the network device. Correspondingly, the network device receives the fourth capability information from the terminal device.

[0383] The fourth capability information is used to indicate the capability of the terminal device to switch between the seventh transmission direction and the eighth transmission direction. That is, the terminal device needs to inform the network device whether it has the capability to switch between the uplink transmission direction and the downlink transmission direction. When the terminal device has the capability to switch between the uplink transmission direction and the downlink transmission direction, step 530 can be performed.

[0384] Optionally, the fourth capability information is used to indicate at least one of the following:

[0385] The capability of the terminal device to keep the transmission direction unchanged in the first time unit;

[0386] The capability of the terminal device to switch between the seventh transmission direction and the eighth transmission direction at any position;

[0387] The capability of the terminal device to dynamically switch between the seventh transmission direction and the eighth transmission direction.

[0388] The capability of the terminal device to keep the transmission direction unchanged in the first time unit can be understood as that the transmission direction of the terminal device is unchanged in the first time unit. For example, if the transmission direction corresponding to the first time unit is the uplink transmission direction, the terminal device only performs uplink transmission in the first time unit. Alternatively, it can be understood that the position of the terminal device to switch between the uplink transmission direction and the downlink transmission direction occurs at the end of the last symbol of the first time unit, or the position of the terminal device to switch between the uplink transmission direction and the downlink transmission direction occurs at the beginning of the first symbol of the first time unit.

[0389] The capability of the terminal device to switch between the seventh transmission direction and the eighth transmission direction at any position can be understood as that the terminal device can switch between the seventh transmission direction and the eighth transmission direction at any symbol or in any time unit. For example, the first time unit includes 14 symbols, and the terminal device switches between the seventh transmission direction and the eighth transmission direction at the end of the 7th symbol.

[0390] The capability of the terminal device to dynamically switch between the seventh transmission direction and the eighth transmission direction can be understood as that the transmission direction corresponding to the first time unit has been determined, but in practice, due to the need for communication, the transmission direction corresponding to the transmission resource scheduled by the DCI received by the terminal device is opposite to the transmission direction corresponding to the first time unit. For example, the seventh transmission direction corresponds to the downlink transmission direction, and the transmission direction corresponding to the transmission resource scheduled by the DCI is the uplink transmission direction (i.e., the transmission direction corresponding to the eighth transmission resource), at this time, step 530 is performed to realize dynamic switching from the seventh transmission direction to the eighth transmission direction.

[0391] It should be noted that the capability of the terminal device to dynamically switch between the seventh transmission direction and the eighth transmission direction can also be the capability of the terminal device to switch from the seventh transmission direction to the transmission direction corresponding to the eighth transmission resource scheduled by the fifth DCI.

[0392] As an example, when the terminal device has the capability of not changing the transmission direction within the first time unit, the terminal device with the capability only switches between the seventh transmission direction and the eighth transmission direction at the boundary of the first time unit. The terminal device without the capability can switch between the seventh transmission direction and the eighth transmission direction at any position, or dynamically switch between the seventh transmission direction and the eighth transmission direction.

[0393] As another example, when the terminal device has the capability of switching between the seventh transmission direction and the eighth transmission direction at any position, the terminal device with the capability switches between the seventh transmission direction and the eighth transmission direction at any position. The terminal device without the capability only switches between the seventh transmission direction and the eighth transmission direction at the boundary of the time unit, or dynamically switches between the seventh transmission direction and the eighth transmission direction.

[0394] As another example, when the terminal device has the capability of dynamically switching between the seventh transmission direction and the eighth transmission direction, the terminal device with the capability can dynamically switch between the seventh transmission direction and the eighth transmission direction, and the terminal device without the capability only switches between the seventh transmission direction and the eighth transmission direction at the boundary of the time unit, or switches between the seventh transmission direction and the eighth transmission direction at any position.

[0395] It should be noted that in the embodiments of the present application, the terminal device sends the fourth capability information to the terminal device, which can also be understood as the terminal device reporting the capability possessed by the terminal device to the network device through the first capability information.

[0396] Optionally, the fourth capability information is used to determine the number of switching occasions of switching between the seventh transmission direction and the eighth transmission direction of the terminal device within the first time unit or the period of SBFD, and / or the position of the switching occasion of switching between the seventh transmission direction and the eighth transmission direction. The switching occasion corresponds to the symbol when switching from the seventh transmission direction to the eighth transmission direction.

[0397] As an example, the capability of the existing FG 5-1 or FG 5-1b can be used, that is, the number of switching occasions of switching between the uplink transmission direction and the downlink transmission direction for each first time unit containing SBFD symbols and / or flexible symbols is limited.

[0398] As another example, a number limit of switching occasions for switching between the uplink transmission direction and the downlink transmission direction per SBFD period. For example, the number of switching occasions for switching between the uplink transmission direction and the downlink transmission direction is limited to no more than T, T is an integer and T≥1, within one SBFD period.

[0399] Optionally, the position of the switching occasion for switching between the seventh transmission direction and the eighth transmission direction is a boundary of the first time unit; or the position of the switching occasion for switching between the seventh transmission direction and the eighth transmission direction is between the SBFD symbol and the non-SBFD symbol.

[0400] Optionally, the position of the switching occasion for switching between the seventh transmission direction and the eighth transmission direction is between the SBFD symbol and the non-SBFD symbol, which can be understood as the position of the end of the SBFD symbol or the position of the start of the non-SBFD symbol when the SBFD symbol is converted into the non-SBFD symbol. Or it can be understood as the position of the end of the non-SBFD symbol or the position of the start of the SBFD symbol when the non-SBFD symbol is converted into the SBFD symbol.

[0401] It should be noted that the terminal device switches between the seventh transmission direction and the eighth transmission direction, which can also be referred to as the terminal device switching between the uplink transmission direction and the downlink transmission direction.

[0402] When the second indication information includes the SBFD configuration information, by limiting the number and position of the switching occasion for switching between the seventh transmission direction and the eighth transmission direction in the first time unit including the SBFD symbol and / or the flexible symbol, the flexibility of the SBFD system scheduling is ensured, and the transmission efficiency of the SBFD system is also ensured.

[0403] 540、The terminal device and the network device perform data transmission.

[0404] As an example, in the case that the terminal device receives the second indication information, the terminal device and the network device perform data transmission according to the seventh transmission direction. For example, the seventh transmission direction is the uplink transmission, and the terminal device sends data to the network device; for another example, the seventh transmission direction is the downlink transmission, and the network device sends data to the terminal device.

[0405] As another example, in the case that the terminal device receives the fifth DCI, the terminal device and the network device perform data transmission through the eighth transmission direction on the symbol occupied by the eighth transmission resource. That is, within the first time unit, the terminal device and the network device perform data transmission according to the eighth transmission direction on the symbol occupied by the eighth transmission resource. On the symbol other than the symbol occupied by the eighth transmission resource, the terminal device and the network device perform data transmission according to the seventh transmission direction.

[0406] In this embodiment of the application, based on determining the seventh transmission direction corresponding to the first time unit, when the terminal device receives a fifth DCI, by imposing timing restrictions on the fifth DCI, sufficient time is reserved for the terminal device to complete the scheduled transmission of the time unit before the start of each time unit, reducing the processing complexity of the terminal device. Furthermore, by allowing the transmission direction corresponding to the transmission resources scheduled by the fifth DCI to be opposite to the seventh transmission direction corresponding to the first time unit, the scheduling flexibility is increased.

[0407] Referring to Figure 16, as an example, Figure 16 is a schematic diagram of another communication method 600 provided in an embodiment of this application. For ease of description, a terminal device and a network device are used as examples for illustrative purposes. The terminal device can be replaced by a terminal or a component of a terminal device (e.g., a chip, chip system, circuit, or communication module), and the network device can be replaced by a component of a network device (e.g., a chip, chip system, circuit, or communication module). Furthermore, the steps described below as being performed by a single execution entity can also be divided into steps performed by multiple execution entities, which can be logically and / or physically separated. The method 600 shown in Figure 16 may include the following steps.

[0408] In this embodiment, method 600 is applied in scenarios where the first time unit includes multiple symbols that are all flexible symbols, all SBFD symbols, some flexible symbols, or some SBFD symbols. The transmission direction corresponding to these flexible symbols or SBFD symbols is uncertain. After the terminal device receives the dynamic scheduling DCI, it determines the transmission direction corresponding to the flexible symbol or SBFD symbol occupied by the transmission resource based on the transmission resources scheduled by the dynamic DCI.

[0409] 610. The network device sends a third instruction message to the terminal device. Correspondingly, the terminal device receives the third instruction message from the network device.

[0410] The third indication information is used to indicate that at least one of the multiple symbols included in the first time unit is a flexible symbol or an SBFD symbol.

[0411] For example, the third instruction information indicates that all of the multiple symbols included in the first time unit are flexible symbols; or the third instruction information indicates that all of the multiple symbols included in the first time unit are SBFD symbols; or the third instruction information indicates that some of the multiple symbols included in the first time unit are flexible symbols; or the third instruction information indicates that some of the multiple symbols included in the first time unit are SBFD symbols.

[0412] Optionally, the third indication information may indicate multiple symbols included in the first time unit, some of which are flexible symbols and some of which are SBFD symbols.

[0413] As an example, the third indication information can be SBFD configuration information, in which case the multiple symbols included in the first time unit are all SBFD symbols.

[0414] As another example, the third instruction information can be TDD configuration information. In this case, all the symbols included in the first time unit can be flexible symbols, or some of the symbols included in the first time unit can be flexible symbols.

[0415] 620. The network device sends the sixth downlink control information to the terminal device. Correspondingly, the terminal device receives the sixth downlink control information from the network device.

[0416] For ease of description, the following description will use the sixth downlink control information as the sixth DCI as an example.

[0417] The sixth DCI is used to schedule the ninth transmission resource, which occupies at least one symbol among the multiple symbols included in the first time unit. The ninth transmission resource corresponds to the ninth transmission direction, which includes either an uplink transmission direction or a downlink transmission direction.

[0418] Furthermore, based on the transmission direction corresponding to the ninth transmission resource, the transmission direction corresponding to the flexible symbol or SBFD symbol occupied by the ninth transmission resource is determined.

[0419] Optionally, before the network device sends the sixth DCI, method 600 further includes step 611, as follows:

[0420] 611. Network devices generate the sixth DCI.

[0421] For example, before sending the sixth DCI to the terminal device, the network device first generates the sixth DCI. For a detailed description of the sixth DCI, please refer to step 620, which will not be repeated here.

[0422] 630. The transmission direction corresponding to the flexible symbol or SBFD symbol occupied by the ninth transmission resource is determined as the ninth transmission direction.

[0423] Optionally, the interval between the last symbol occupied by the sixth DCI and the first symbol of the first time unit is greater than or equal to an eighth preset value. That is, within the first time unit, the transmission direction corresponding to the flexible symbol or SBFD symbol is uncertain; it can be either an uplink or downlink transmission direction. After the terminal device receives the sixth DCI, it determines the transmission direction corresponding to the flexible symbol or SBFD symbol occupied by the ninth transmission resource as the ninth transmission direction based on the transmission direction corresponding to the ninth transmission resource scheduled by the sixth DCI. For example, if the ninth transmission direction is an uplink transmission direction, then the transmission direction corresponding to the flexible symbol or SBFD symbol among the symbols occupied by the ninth transmission resource is the uplink transmission direction.

[0424] It should be noted that the interval between the symbols occupied by the sixth DCI and the symbols occupied by its scheduled transmission resources (i.e., the ninth transmission resource) must also meet the processing delay requirements. For example, when the sixth DCI is a UL-DCI, the interval between the last symbol occupied by the UL-DCI and the first symbol occupied by the PUSCH scheduled by the UL-DCI is greater than or equal to the sixth value. As another example, when the sixth DCI is a DL-DCI, the first symbol occupied by the DL-DCI follows the first symbol occupied by the PDSCH scheduled by the DL-DCI; or the first symbol occupied by the DL-DCI is the same as the first symbol occupied by the PDSCH scheduled by the DL-DCI.

[0425] 640. Data transmission between terminal devices and network devices.

[0426] For example, on the ninth transmission resource occupancy flexible symbol or SBFD symbol, data transmission occurs between the terminal device and the network device according to the ninth transmission direction. For instance, if the ninth transmission direction is an uplink transmission direction, the terminal device sends data to the network device. Or, if the ninth transmission direction is a downlink transmission direction, the network device sends data to the terminal device.

[0427] In this embodiment of the application, by dynamically scheduling the transmission direction corresponding to the transmission resources scheduled by DCI, the transmission direction corresponding to the flexible symbol or SBFD symbol in the first time unit can be determined. Furthermore, by constraining the interval between the last symbol occupied by DCI and the first symbol occupied by the scheduled transmission resources, the terminal device can complete the transmission configuration of the DCI scheduling before the start of the first time unit, thereby reducing the processing complexity of the terminal device.

[0428] The methods provided by the embodiments of this application have been described in detail above with reference to Figures 6 to 16. The apparatus provided by the embodiments of this application will be described in detail below with reference to Figures 17 to 19. It should be understood that the descriptions of the apparatus embodiments correspond to the descriptions of the method embodiments; therefore, any content not described in detail can be referred to the method embodiments above, and for the sake of brevity, will not be repeated here.

[0429] Referring to Figure 17, as an example, Figure 17 is a schematic diagram of a communication device 1000 provided in an embodiment of this application. The communication device 1000 includes a transceiver unit 1010 and a processing unit 1020. The transceiver unit 1010 can be used to implement corresponding communication functions. The transceiver unit 1010 can also be referred to as a communication interface or a communication unit. The processing unit 1020 can be used to perform processing.

[0430] Optionally, the device 1000 may further include a storage unit, which can be used to store instructions and / or data, and the processing unit 1020 can read the instructions and / or data in the storage unit to enable the device to implement the aforementioned method embodiments.

[0431] In a first possible design, the device 1000 can be the terminal device in the aforementioned embodiments, and the device 1200 can implement the steps or processes corresponding to those executed by the terminal device in the above method embodiments. Specifically, the transceiver unit 1010 can be used to perform transceiver-related operations (such as sending and / or receiving data or messages) of the terminal device in the above method embodiments, and the processing unit 1020 can be used to perform processing-related operations of the terminal device in the above method embodiments, or operations other than transceiver (such as operations other than sending and / or receiving data or messages).

[0432] In one possible implementation, a transceiver unit 1010 is used to receive first downlink control information (DCI), which is used to schedule first transmission resources; a processing unit 100 is used to determine a first transmission direction corresponding to a first time unit based on the transmission direction corresponding to the first transmission resource. The first time unit includes multiple symbols, and the first transmission resource occupies at least one of the multiple symbols included in the time unit. The first transmission direction includes one of uplink transmission direction and downlink transmission direction, and the interval between the last symbol occupied by the first DCI and the first symbol of the first time unit is greater than or equal to a first preset value.

[0433] Another possible implementation is as follows: a transceiver unit 1010 is used to receive first downlink control information (DCI), which is used to schedule first transmission resources; a processing unit 100 is used to determine a first transmission direction corresponding to a first time unit based on the transmission direction corresponding to the first transmission resource. The first time unit includes multiple symbols, and the first transmission resource occupies at least one of the multiple symbols included in the time unit. The first transmission direction includes either an uplink transmission direction or a downlink transmission direction. The interval between the last symbol occupied by the first DCI and the first symbol occupied by the second transmission resource is greater than or equal to a second preset value. The second transmission resource is a semi-statically configured transmission resource, and the second transmission resource occupies at least one of the multiple symbols included in the first time unit. The symbols occupied by the second transmission resource are different from those occupied by the first transmission resource.

[0434] Another possible implementation is that the transceiver unit 1010 is used to receive semi-static configuration information, which is used to indicate the fourth transmission resource; the processing unit 100 is used to determine the third transmission direction corresponding to the first time unit according to the transmission direction corresponding to the fourth transmission resource, the first time unit includes multiple symbols, the fourth transmission resource occupies at least one of the multiple symbols included in the time unit, wherein the third transmission direction includes one of the uplink transmission direction and the downlink transmission direction.

[0435] In another possible implementation, the transceiver unit 1010 is configured to receive first indication information at a first time, the first indication information indicating a fifth transmission direction corresponding to a sixth transmission resource, the fifth transmission direction including one of an uplink transmission direction and a downlink transmission direction, the sixth transmission resource occupying at least one symbol among a plurality of symbols included in the first time unit; the transceiver unit 1010 is further configured to receive fourth downlink control information (DCI) at a second time, the fourth DCI being used to schedule a seventh transmission resource, the seventh transmission resource corresponding to the sixth transmission direction, the sixth transmission direction being different from the fifth transmission direction, the seventh transmission resource occupying at least one symbol among a plurality of symbols included in the first time unit, the seventh transmission resource occupying a different symbol than the sixth transmission resource; the processing unit 100 is configured to switch the fifth transmission direction to the sixth transmission direction, wherein the interval between the last symbol occupied by the fourth DCI and the first symbol occupied by the sixth transmission resource is greater than or equal to a fifth preset value; or the interval between the last symbol occupied by the fourth DCI and the first symbol of the first time unit is greater than or equal to a sixth preset value.

[0436] In a second possible design, the device 1000 can be a network device as described in the foregoing embodiments. This device 1000 can implement the steps or processes performed by the network device corresponding to those described in the above method embodiments. Specifically, the transceiver unit 1010 can be used to perform transceiver-related operations (such as sending and / or receiving data or messages) of the network device described in the above method embodiments, and the processing unit 1020 can be used to perform processing-related operations of the network device described in the above method embodiments, or operations other than transceiver operations (such as operations other than sending and / or receiving data or messages).

[0437] In one possible implementation, a processing unit 1020 is configured to generate a first downlink control information (DCI), which is used to schedule a first transmission resource. The first transmission resource occupies at least one symbol from a plurality of symbols included in a first time unit. The first time unit corresponds to a first transmission direction, which is determined based on the transmission direction corresponding to the first transmission resource. The first transmission direction includes either an uplink transmission direction or a downlink transmission direction. The interval between the last symbol occupied by the first DCI and the first symbol of the first time unit is greater than or equal to a first preset value. A transceiver unit 1010 is configured to transmit the first DCI.

[0438] Another possible implementation involves a processing unit 1020, which generates a first downlink control information (DCI) to schedule a first transmission resource. This first transmission resource occupies at least one symbol from a plurality of symbols included in a first time unit. The first time unit corresponds to a first transmission direction, which is determined based on the transmission direction corresponding to the first transmission resource. The first transmission direction includes either an uplink transmission direction or a downlink transmission direction. The interval between the last symbol occupied by the first DCI and the first symbol occupied by the second transmission resource is greater than or equal to a second preset value. The second transmission resource is a semi-statically configured transmission resource, occupying at least one symbol from the plurality of symbols included in the first time unit, and the symbols occupied by the second transmission resource are different from those occupied by the first transmission resource. A transceiver unit 1010 is used to transmit the first DCI.

[0439] Another possible implementation is a processing unit 100, which generates semi-static configuration information to indicate a fourth transmission resource. The fourth transmission resource occupies at least one symbol among a plurality of symbols included in a first time unit. The first time unit corresponds to a third transmission direction, which is determined based on the transmission direction corresponding to the fourth transmission resource. The third transmission direction includes one of an uplink transmission direction and a downlink transmission direction. A transceiver unit 1010 is used to send the semi-static configuration information.

[0440] In another possible implementation, the transceiver unit 1010 is configured to send first indication information at a first time, the first indication information being used to indicate a fifth transmission direction corresponding to a sixth transmission resource, the fifth transmission direction including one of an uplink transmission direction and a downlink transmission direction, the sixth transmission resource occupying at least one symbol among the multiple symbols included in the first time unit; the transceiver unit 1010 is also configured to send fourth downlink control information (DCI) at a second time, the fourth DCI being used to schedule a seventh transmission resource, the seventh transmission resource corresponding to the sixth transmission direction, the sixth transmission direction being different from the fifth transmission direction, the seventh transmission resource occupying at least one symbol among the multiple symbols included in the first time unit, the seventh transmission resource occupying a different symbol than the sixth transmission resource.

[0441] It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0442] It should also be understood that the device 1000 here is embodied in the form of a functional unit. The term "unit" here can refer to an application-specific integrated circuit (ASIC), electronic circuitry, a processor (e.g., a shared processor, a proprietary processor, or a group processor, etc.) and memory for executing one or more software or firmware programs, integrated logic circuitry, and / or other suitable components supporting the described functions. In an alternative example, those skilled in the art will understand that the device 1000 can be specifically the communication device in the above embodiments, and can be used to execute the various processes and / or steps corresponding to the communication device in the above method embodiments; to avoid repetition, these will not be described again here.

[0443] The apparatus 1000 of each of the above-described schemes has the function of implementing the corresponding steps performed by the communication device (such as a terminal device or a network device) in the above-described methods. The function can be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (e.g., the transmitting unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as processing units, can be replaced by processors, each performing the transceiver operations and related processing operations in the respective method embodiments.

[0444] In addition, the transceiver unit 1010 may also be a transceiver circuit (for example, it may include a receiving circuit and a transmitting circuit), and the processing unit may be a processing circuit.

[0445] It should be noted that the device in Figure 17 can be the communication device (such as a terminal device or a network device) in the foregoing embodiments, or it can be a chip or a chip system, such as a system on a chip (SoC). The transceiver unit can be an input / output circuit or a communication interface; the processing unit is a processor, microprocessor, or integrated circuit integrated on the chip. No limitations are imposed here.

[0446] Referring to Figure 18, as an example, Figure 18 is a schematic diagram of another communication device 2000 provided in an embodiment of this application. The device 2000 includes a processor 2010, which is coupled to a memory 2020. The memory 2020 is used to store computer programs or instructions and / or data. The processor 2010 is used to execute the computer programs or instructions stored in the memory 2020, or to read the data stored in the memory 2020, in order to perform the methods in the above-described method embodiments.

[0447] Optionally, there may be one or more processors 2010.

[0448] Optionally, the memory 2020 may be one or more.

[0449] Alternatively, the memory 2020 can be integrated with the processor 2010, or it can be set up separately.

[0450] Optionally, as shown in FIG18, the device 2000 further includes a transceiver 2030 for receiving and / or transmitting signals. For example, the processor 2010 is used to control the transceiver 2030 to receive and / or transmit signals.

[0451] As an example, processor 2010 may have the functions of processing unit 1020 shown in FIG17, memory 2020 may have the functions of storage unit, and transceiver 2030 may have the functions of transceiver unit 1010 shown in FIG17.

[0452] As one option, the device 2000 is used to implement the operations performed by a communication device (such as a terminal device or a network device) in the various method embodiments described above.

[0453] For example, processor 2010 is used to execute computer programs or instructions stored in memory 2020 to implement the relevant operations of the communication device in the various method embodiments above.

[0454] It should be understood that the processor mentioned in the embodiments of this application can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0455] It should also be understood that the memory mentioned in the embodiments of this application can be volatile memory and / or non-volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0456] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) can be integrated into the processor.

[0457] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0458] Referring to Figure 19, as an example, Figure 19 is a schematic diagram of a chip system 3000 provided in an embodiment of this application. The chip system 3000 (or may also be called a processing system) includes logic circuitry 3010 and an input / output interface 3020.

[0459] The logic circuit 3010 can be a processing circuit in the chip system 3000. The logic circuit 3010 can be coupled to a memory unit, calling instructions from the memory unit, enabling the chip system 3000 to implement the methods and functions of the embodiments of this application. The input / output interface 3020 can be an input / output circuit in the chip system 3000, outputting processed information from the chip system 3000, or inputting data or signaling information to be processed into the chip system 3000 for processing.

[0460] As one approach, the chip system 3000 is used to implement the operations performed by communication devices (such as terminal devices or network devices) in the various method embodiments described above.

[0461] For example, logic circuit 3010 is used to implement processing-related operations performed by a communication device (such as a terminal device or a network device) in the above method embodiments; input / output interface 3020 is used to implement sending and / or receiving-related operations performed by a communication device (such as a terminal device or a network device) in the above method embodiments.

[0462] This application also provides a computer-readable storage medium storing a computer program or instructions for implementing the methods executed by a communication device (such as a terminal device or a network device) in the above-described method embodiments. For example, when the computer program or instructions are run on the communication device, the communication device (such as a terminal device or a network device) performs the above-described methods (such as methods 200 to 600).

[0463] This application also provides a computer program product comprising instructions that, when executed by a computer, implement the methods described above as performed by a communication device (such as a terminal device or a network device). For example, when the computer program or instructions are run on the communication device, the communication device (such as a terminal device or a network device) performs the methods described above (such as methods 200 to 600).

[0464] This application also provides a communication system that includes the terminal device and / or network device described in the embodiments above. For example, the system includes the terminal device and network device shown in the embodiment of FIG6.

[0465] The explanations and beneficial effects of the relevant contents in any of the devices provided above can be found in the corresponding method embodiments provided above, and will not be repeated here.

[0466] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of apparatus or units may be electrical, mechanical, or other forms.

[0467] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. For example, the computer can be a personal computer, a server, or a network device, etc. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks, SSDs). For example, the aforementioned available media include, but are not limited to, various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0468] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A communication method characterized by comprising: The method comprises: receiving a first downlink control information (DCI), the first DCI being used for scheduling a first transmission resource; determining a first transmission direction corresponding to a first time unit according to a transmission direction corresponding to the first transmission resource, the first time unit comprising a plurality of symbols, the first transmission resource occupying at least one symbol of the plurality of symbols comprised in the first time unit, wherein the first transmission direction comprises one of an uplink transmission direction and a downlink transmission direction, and an interval between a last symbol occupied by the first DCI and a first symbol of the first time unit is greater than or equal to a first preset value.

2. A communication method characterized by comprising: The method comprises: receiving a first downlink control information (DCI), the first DCI being used for scheduling a first transmission resource; determining a first transmission direction corresponding to a first time unit according to a transmission direction corresponding to the first transmission resource, the first time unit comprising a plurality of symbols, the first transmission resource occupying at least one symbol of the plurality of symbols comprised in the first time unit, wherein the first transmission direction comprises one of an uplink transmission direction and a downlink transmission direction, and an interval between a last symbol occupied by the first DCI and a first symbol of the first time unit is greater than or equal to a first preset value.

3. The method according to claim 1 or 2, characterized in that, The method further comprises: receiving a second DCI, the second DCI being used for scheduling a third transmission resource, the third transmission resource occupying at least one symbol of the plurality of symbols comprised in the first time unit, the third transmission resource corresponding to a second transmission direction, the second transmission direction being different from the first transmission direction; switching a transmission direction corresponding to the symbol occupied by the third transmission resource from the first transmission direction to the second transmission direction, wherein an interval between a last symbol occupied by the second DCI and a first symbol of the first time unit is greater than or equal to a third preset value.

4. The method of claim 3, wherein, The method further comprises: sending first capability information, the first capability information being used for indicating a capability of the terminal device for switching between the first transmission direction and the second transmission direction.

5. The method of claim 4, wherein, The first capability information is used for indicating any one of: a capability of the terminal device for keeping a transmission direction unchanged within the first time unit; a capability of the terminal device for switching between the first transmission direction and the second transmission direction at any position; a capability of the terminal device for dynamically switching between the first transmission direction and the second transmission direction.

6. A communication method characterized by comprising: The method comprises: generating a first downlink control information (DCI), the first DCI being used for scheduling a first transmission resource, the first transmission resource occupying at least one symbol in a plurality of symbols included in a first time unit, the first time unit corresponding to a first transmission direction, the first transmission direction being determined according to a transmission direction corresponding to the first transmission resource, and the first transmission direction including one of an uplink transmission direction and a downlink transmission direction, wherein a gap between a last symbol occupied by the first DCI and a first symbol of the first time unit is greater than or equal to a first preset value; transmitting the first DCI.

7. A communication method characterized by comprising: comprising: generating a first downlink control information (DCI), the first DCI being used for scheduling a first transmission resource, the first transmission resource occupying at least one symbol in a plurality of symbols included in a first time unit, the first time unit corresponding to a first transmission direction, the first transmission direction being determined according to a transmission direction corresponding to the first transmission resource, and the first transmission direction including one of an uplink transmission direction and a downlink transmission direction, wherein a gap between a last symbol occupied by the first DCI and a first symbol of the first time unit is greater than or equal to a first preset value; transmitting the first DCI.

8. The method according to claim 6 or 7, characterized in that, The method further comprises: transmitting a second DCI, the second DCI being used for scheduling a third transmission resource, the third transmission resource occupying at least one symbol in a plurality of symbols included in the first time unit, the third transmission resource corresponding to a second transmission direction, the second transmission direction being different from the first transmission direction, wherein a gap between a last symbol occupied by the second DCI and a first symbol of the first time unit is greater than or equal to a third preset value.

9. The method of claim 8, wherein, The method further comprises: receiving first capability information, the first capability information being used for indicating a capability of a terminal device for switching between the first transmission direction and the second transmission direction.

10. The method of claim 9, wherein, The first capability information is used for indicating any one of: a capability of the terminal device for keeping a transmission direction unchanged within the first time unit; a capability of the terminal device for switching between the first transmission direction and the second transmission direction at any position; a capability of the terminal device for dynamically switching between the first transmission direction and the second transmission direction.

11. A communication method, comprising: comprising: receiving semi-static configuration information, the semi-static configuration information being used for indicating a fourth transmission resource; determining a third transmission direction corresponding to a first time unit according to a transmission direction corresponding to the fourth transmission resource, the first time unit including a plurality of symbols, the fourth transmission resource occupying at least one symbol in the plurality of symbols included in the first time unit, wherein the third transmission direction includes one of an uplink transmission direction and a downlink transmission direction.

12. The method of claim 11, wherein, The determining a third transmission direction corresponding to a first time unit according to a transmission direction corresponding to the fourth transmission resource comprises: The third transmission direction is the same as a transmission direction corresponding to the fourth transmission resource when an interval between a first symbol occupied by the fourth transmission resource and a first symbol of the first time unit is the smallest. The third transmission direction is the same as a transmission direction corresponding to the fourth transmission resource when a priority of a type of the fourth transmission resource is the highest, the type of the fourth transmission resource including a data transmission resource, a control transmission resource, and a reference signal transmission resource. The third transmission direction is the same as a transmission direction corresponding to the fourth transmission resource when a priority of the fourth transmission resource is the highest. The third transmission direction is the same as a transmission direction corresponding to the fourth transmission resource when the transmission corresponding to the fourth transmission resource is a non-first transmission in K times of repeated transmissions, and at least one transmission in the K times of repeated transmissions has been performed before the fourth transmission resource, K being an integer greater than or equal to 2.

13. The method according to claim 11 or 12, characterized in that, The method further includes: receiving third downlink control information (DCI), the third DCI being used to schedule a fifth transmission resource, the fifth transmission resource occupying at least one symbol in a plurality of symbols included in the first time unit, the fifth transmission resource corresponding to a fourth transmission direction, the fourth transmission direction being different from the third transmission direction; switching a transmission direction corresponding to a symbol occupied by the fifth transmission resource from the third transmission direction to the fourth transmission direction, wherein an interval between a last symbol occupied by the third DCI and a first symbol of the first time unit is greater than or equal to a fourth preset value.

14. The method of claim 13, wherein, The method further includes: sending second capability information, the second capability information being used to indicate a capability of the terminal device to switch between the third transmission direction and the fourth transmission direction.

15. The method of claim 14, wherein, The second capability information is used to indicate any one of the following: a capability of the terminal device to keep a transmission direction unchanged within the first time unit; a capability of the terminal device to switch between the third transmission direction and the fourth transmission direction at any position; a capability of the terminal device to perform dynamic switching between the third transmission direction and the fourth transmission direction.

16. A method of communication, comprising: The method further includes: generating semi-static configuration information, the semi-static configuration information being used to indicate a fourth transmission resource, the fourth transmission resource occupying at least one symbol in a plurality of symbols included in a first time unit, the first time unit corresponding to a third transmission direction, the third transmission direction being determined according to a transmission direction corresponding to the fourth transmission resource, and the third transmission direction including one of an uplink transmission direction and a downlink transmission direction; sending the semi-static configuration information.

17. The method of claim 16, wherein, The method further includes: sending third downlink control information (DCI), the third DCI being used to schedule a fifth transmission resource, the fifth transmission resource occupying at least one symbol in a plurality of symbols included in the first time unit, the fifth transmission resource corresponding to a fourth transmission direction, the fourth transmission direction being different from the third transmission direction, wherein an interval between a last symbol occupied by the third DCI and a first symbol of the first time unit is greater than or equal to a fourth preset value.

18. The method of claim 17, wherein, The method further includes: receive second capability information, the second capability information being used to indicate a capability of the terminal device to switch between the third transmission direction and the fourth transmission direction.

19. The method of claim 18, wherein, The second capability information is used to indicate any of the following: a capability of the terminal device to keep the transmission direction unchanged within the first time unit; a capability of the terminal device to switch between the third transmission direction and the fourth transmission direction at any position; a capability of the terminal device to dynamically switch between the third transmission direction and the fourth transmission direction.

20. A method of communication, comprising: comprise: receive first indication information at a first time, the first indication information being used to indicate a fifth transmission direction corresponding to a sixth transmission resource, the fifth transmission direction comprising one of an uplink transmission direction and a downlink transmission direction, the sixth transmission resource occupying at least one symbol in a plurality of symbols included in a first time unit; receive fourth downlink control information (DCI) at a second time, the fourth DCI being used to schedule a seventh transmission resource, the seventh transmission resource corresponding to a sixth transmission direction, the sixth transmission direction being different from the fifth transmission direction, the seventh transmission resource occupying at least one symbol in the plurality of symbols included in the first time unit, the seventh transmission resource being different from a symbol occupied by the sixth transmission resource; switch a transmission direction from the fifth transmission direction to the sixth transmission direction, wherein an interval between a last symbol occupied by the fourth DCI and a first symbol occupied by the sixth transmission resource is greater than or equal to a fifth preset value; or an interval between a last symbol occupied by the fourth DCI and a first symbol of the first time unit is greater than or equal to a sixth preset value.

21. The method of claim 20, wherein, The method further comprises: send third capability information, the third capability information being used to indicate a capability of the terminal device to switch between the fifth transmission direction and the sixth transmission direction.

22. The method of claim 21, wherein, The third capability information is used to indicate any of the following: a capability of the terminal device to keep the transmission direction unchanged within the first time unit; a capability of the terminal device to switch between the fifth transmission direction and the sixth transmission direction at any position; a capability of the terminal device to dynamically switch between the fifth transmission direction and the sixth transmission direction.

23. A method of communication, comprising: comprise: send first indication information at a first time, the first indication information being used to indicate a fifth transmission direction corresponding to a sixth transmission resource, the fifth transmission direction comprising one of an uplink transmission direction and a downlink transmission direction, the sixth transmission resource occupying at least one symbol in a plurality of symbols included in a first time unit; send fourth downlink control information (DCI) at a second time, the fourth DCI being used to schedule a seventh transmission resource, the seventh transmission resource corresponding to a sixth transmission direction, the sixth transmission direction being different from the fifth transmission direction, the seventh transmission resource occupying at least one symbol in the plurality of symbols included in the first time unit, the seventh transmission resource being different from a symbol occupied by the sixth transmission resource; The interval between the last symbol occupied by the fourth DCI and the first symbol occupied by the sixth transmission resource is greater than or equal to a fifth preset value; or The interval between the last symbol occupied by the fourth DCI and the first symbol of the first time unit is greater than or equal to a sixth preset value.

24. The method of claim 23, wherein, The method further comprises: Receiving third capability information, the third capability information being used to indicate the capability of the terminal device to switch between the fifth transmission direction and the sixth transmission direction.

25. The method of claim 24, wherein, The third capability information is used to indicate any of the following: The capability of the terminal device to keep the transmission direction unchanged within the first time unit; The capability of the terminal device to switch between the fifth transmission direction and the sixth transmission direction at any position; The capability of the terminal device to dynamically switch between the fifth transmission direction and the sixth transmission direction.

26. A communications device, characterized by The apparatus comprises a module or unit for performing the method of any of claims 1 to 5; or, a module or unit for performing the method of any of claims 6 to 10; or, a module or unit for performing the method of any of claims 11 to 15; or, a module or unit for performing the method of any of claims 16 to 19; or, a module or unit for performing the method of any of claims 20 to 22; or, a module or unit for performing the method of any of claims 23 to 25.

27. A communications device, characterized by The apparatus comprises a processor configured to cause the communication device to perform the method of any of claims 1 to 5, or, to cause the communication device to perform the method of any of claims 6 to 10, or, to cause the communication device to perform the method of any of claims 11 to 15, or, to cause the communication device to perform the method of any of claims 16 to 19, or, to cause the communication device to perform the method of any of claims 20 to 22, or, to cause the communication device to perform the method of any of claims 23 to 25.

28. A computer-readable storage medium, characterized in that, The computer readable storage medium has stored thereon a computer program or instructions, which, when executed on a communication device, cause the communication device to perform the method of any of claims 1 to 5, or, cause the communication device to perform the method of any of claims 6 to 10, or, cause the communication device to perform the method of any of claims 11 to 15, or, cause the communication device to perform the method of any of claims 16 to 19, or, cause the communication device to perform the method of any of claims 20 to 22, or, cause the communication device to perform the method of any of claims 23 to 25.

29. A computer program product, characterised in that, The computer program product comprises computer programs or instructions which, when run on a communication device, cause the communication device to perform the method of any one of claims 1 to 5, or cause the communication device to perform the method of any one of claims 6 to 10, or cause the communication device to perform the method of any one of claims 11 to 15, or cause the communication device to perform the method of any one of claims 16 to 19, or cause the communication device to perform the method of any one of claims 20 to 22, or cause the communication device to perform the method of any one of claims 23 to 25.

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