WO2024140522A1 - Communication method, terminal, and network side device - Google Patents

Abstract

The present application relates to the technical field of communications, and discloses a communication method, a terminal, and a network side device. The communication method in embodiments of the present application comprises: a terminal determining a target time-frequency resource according to a first time-frequency resource and/or a second time-frequency resource; and performing FD transmission on the basis of the target time-frequency resource, wherein the first time-frequency resource is a time-frequency resource for a network side device to perform FD transmission and/or a time-frequency resource for the terminal to perform half-duplex transmission, and the second time-frequency resource is a time-frequency resource for the terminal to perform FD transmission.

Description

Communication method, terminal and network side equipment

cross reference

This application claims priority to a Chinese patent application filed with the China Patent Office on December 26, 2022, with application number 202211676151.X and title “Communication Method, Terminal and Network Side Equipment”. The entire contents of the application are incorporated by reference into this application.

Technical Field

The present application belongs to the field of communication technology, and specifically relates to a communication method, a terminal and a network side device.

Background technique

Compared with previous mobile communication systems, future communication systems such as 5G (fifth generation) need to adapt to more diverse scenarios and business needs. For example, the main scenarios of 5G NR (New Radio) communication systems include enhanced mobile broadband (eMBB), massive machine type communication (mMTC), ultra-reliable and low latency communications (URLLC), etc., and these scenarios put forward requirements for communication systems such as high reliability, low latency, large bandwidth, and wide coverage.

However, for the time division duplexing (TDD) system involved in the 5G NR communication system, how to improve the TDD system performance (such as latency, coverage, etc.) to meet the diverse needs of different business scenarios is still a technical problem that needs to be urgently solved in this field.

Summary of the invention

The embodiments of the present application provide a communication method, a terminal, and a network-side device, which can improve the performance of a TDD system and meet the diverse needs of different business scenarios.

In a first aspect, a communication method is provided, including: a terminal determines a target time-frequency resource based on a first time-frequency resource and/or a second time-frequency resource; and performs full-duplex FD transmission based on the target time-frequency resource; wherein the first time-frequency resource is a time-frequency resource used for FD transmission by a network-side device and/or a time-frequency resource used by the terminal for half-duplex transmission, and the second time-frequency resource is a time-frequency resource used for FD transmission by the terminal.

In a second aspect, a communication method is provided, the method comprising: a network side device provides a first time-frequency resource and/or a second time-frequency resource to a terminal; wherein the first time-frequency resource is a time-frequency resource used by the network side device to perform FD transmission; The source and/or the terminal perform half-duplex transmission time-frequency resources, and the second time-frequency resources are time-frequency resources used for the terminal to perform FD transmission.

According to a third aspect, a communication device is provided, comprising: a determination module for determining a target time-frequency resource based on a first time-frequency resource and/or a second time-frequency resource; and a transmission module for performing full-duplex FD transmission based on the target time-frequency resource; wherein the first time-frequency resource is a time-frequency resource for FD transmission by a network-side device and/or a time-frequency resource for half-duplex transmission by the terminal, and the second time-frequency resource is a time-frequency resource for FD transmission by the terminal.

In a fourth aspect, a communication device is provided, comprising: a transmission module, configured to provide a first time-frequency resource and/or a second time-frequency resource to a terminal; wherein the first time-frequency resource is a time-frequency resource used for FD transmission by a network-side device and/or a time-frequency resource used for half-duplex transmission by the terminal, and the second time-frequency resource is a time-frequency resource used for FD transmission by the terminal.

In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the method described in the first aspect.

In a seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

In an eighth aspect, a network side device is provided, comprising a processor and a communication interface, wherein the communication interface and the processor are coupled, and the processor is used to run a program or instruction to implement the steps of the method described in the second aspect.

In a ninth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

In the tenth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

In the eleventh aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

In the twelfth aspect, a computer program product/program product is provided, wherein the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

In an embodiment of the present application, the terminal determines the target time-frequency resource for FD transmission based on the first time-frequency resource and/or the second time-frequency resource, and then performs FD transmission based on the target time-frequency resource, which can not only achieve the purpose of enhancing coverage, reducing transmission delay, and improving resource utilization efficiency, but also improve the downlink or uplink throughput and improve the performance of the communication system.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a wireless communication system provided by an exemplary embodiment of the present application.

FIG. 2 is one of the flowchart diagrams of a communication method provided by an exemplary embodiment of the present application.

FIG. 3 is a second flowchart of a communication method provided by an exemplary embodiment of the present application.

FIG. 4 a is a schematic diagram of time domain resources provided by an exemplary embodiment of the present application.

FIG. 4 b is one of the schematic diagrams of target time domain resources provided by an exemplary embodiment of the present application.

FIG. 4c is a second schematic diagram of target time domain resources provided by an exemplary embodiment of the present application.

FIG. 4 d is one of the schematic diagrams of frequency domain resources provided by an exemplary embodiment of the present application.

FIG. 4e is one of the schematic diagrams of a DCI structure provided by an exemplary embodiment of the present application.

FIG4f is a second schematic diagram of a DCI structure provided by an exemplary embodiment of the present application.

FIG. 5 is a third flowchart of a communication method provided by an exemplary embodiment of the present application.

FIG6a is one of the schematic diagrams of time-frequency resources provided by an exemplary embodiment of the present application.

FIG6b is a second schematic diagram of time-frequency resources provided by an exemplary embodiment of the present application.

FIG6c is a third schematic diagram of time-frequency resources provided by an exemplary embodiment of the present application.

FIG6d is a fourth schematic diagram of time-frequency resources provided by an exemplary embodiment of the present application.

FIG6e is a fifth schematic diagram of time-frequency resources provided by an exemplary embodiment of the present application.

FIG6f is a sixth schematic diagram of time-frequency resources provided by an exemplary embodiment of the present application.

FIG6g is the seventh schematic diagram of time-frequency resources provided by an exemplary embodiment of the present application.

FIG6h is an eighth schematic diagram of time-frequency resources provided by an exemplary embodiment of the present application.

FIG6i is a ninth schematic diagram of time-frequency resources provided by an exemplary embodiment of the present application.

FIG. 7 is a fourth flowchart of a communication method provided by an exemplary embodiment of the present application.

FIG. 8 is one of the structural schematic diagrams of a communication device provided by an exemplary embodiment of the present application.

FIG. 9 is a second schematic diagram of the structure of a communication device provided by an exemplary embodiment of the present application.

FIG. 10 is a schematic diagram of the structure of a terminal provided by an exemplary embodiment of the present application.

FIG. 11 is a schematic diagram of the structure of a network-side device provided by an exemplary embodiment of the present application.

Detailed ways

The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances. The embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and/or" in the specification and claims means at least one of the connected objects, and the character "/" generally means that the objects connected before and after are in an "or" relationship.

It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE)/LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned systems and radio technologies as well as for other systems and radio technologies. The following description describes a new radio (NR) system for example purposes, and NR terms are used in most of the following descriptions, but these technologies can also be applied to applications other than NR system applications, such as the ^6th Generation (6G) communication system.

FIG1 shows a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network side device 12 . The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (AR)/virtual reality (VR) device, a robot, a wearable device (Wearable Device), a vehicle user equipment (VUE), a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (a home appliance with wireless communication function, such as a refrigerator, a television, a washing machine or furniture, etc.), a game console, a personal computer (personal computer, PC), a teller machine or a self-service machine and other terminal side devices, and the wearable device includes: a smart watch, a smart bracelet, a smart headset, a smart glasses, a smart jewelry (smart bracelet, a smart bracelet, a smart ring, a smart necklace, a smart anklet, a smart anklet, etc.), a smart wristband, a smart clothing, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (RAN), a radio access network function or a radio access network unit. The access network device 12 may include a base station, a WLAN access point or a WiFi node, etc. The base station may be referred to as a node B, an evolved node B (evolved Node B, eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home B node, a home evolved B node, a transmitting and receiving point (Transmitting Receiving Point, TRP) or other appropriate terms in the field, as long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary, it should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited. The technical solution provided by the embodiments of the present application is described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

As shown in Figure 2, it is a flow chart of a communication method 200 provided by an exemplary embodiment of the present application. The method 200 can be, but is not limited to, executed by a terminal, and can be specifically executed by hardware and/or software installed in the terminal. In this embodiment, the method 200 can at least include the following steps.

S210. The terminal determines a target time-frequency resource according to the first time-frequency resource and/or the second time-frequency resource.

Among them, the terminal may be capable of simultaneously performing downlink (DL) transmission (DL channel or signal, etc.) and uplink (UL) transmission (such as UL signal or channel) on non-overlapping frequency domain resources (hereinafter referred to as sub-band) of a carrier or bandwidth part (Bandwidth Part, BWP), or may be capable of simultaneously performing DL transmission and UL transmission on a sub-band with overlapping BWP of a carrier. In other words, the terminal mentioned in the present application has the ability of simultaneous transmission and reception (i.e. full-duplex (FD) transmission), and the aforementioned UL transmission may also be referred to as UL sending, and DL transmission may also be referred to as DL receiving, which is not limited here.

Based on this, in this embodiment, the first time-frequency resource (also referred to as network-side full-duplex (GNB-Full Duplex, GNB-FD) time-frequency resource) is a time-frequency resource used for the network-side device to perform FD transmission and/or a time-frequency resource used by the terminal to perform half-duplex transmission, that is, the first time-frequency resource is used for full-duplex operation on the network side (i.e., the network-side device), thereby achieving the purpose of enhancing coverage, reducing transmission delay, and improving resource utilization efficiency.

The second time-frequency resource (also referred to as UE-FD time-frequency resource) is a time-frequency resource used for FD transmission on the network side and a time-frequency resource used for FD transmission on the terminal side, that is, the second time-frequency resource can be used for full-duplex operation of the terminal, thereby achieving the purpose of enhancing coverage, reducing transmission delay, and improving resource utilization efficiency, and improving DL or UL throughput.

Optionally, the first time-frequency resource and the second time-frequency resource can be implemented by network side configuration, protocol agreement, high-level configuration, etc., and are not limited here. For example, the first time-frequency resource may include time domain resources (such as slots, symbols, frames, etc.) supporting full-duplex transmission on the network side (and/or half-duplex transmission on the terminal side), and/or frequency domain resources (such as UL sub-bands, DL sub-bands, etc.) supporting full-duplex transmission. Correspondingly, the second time-frequency resource may include time domain resources (such as slots, symbols, frames, etc.) supporting full-duplex transmission of the terminal, and/or frequency domain resources (such as UL sub-bands, DL sub-bands, etc.) supporting full-duplex transmission, and this embodiment is not limited here.

Based on this, the terminal may determine the target time-frequency resource according to the first time-frequency resource and/or the second time-frequency resource by means of a protocol agreement, a high-level configuration, or a network-side configuration. For example, it may be indicated or configured to determine the target time-frequency resource according to the first time-frequency resource and/or the second time-frequency resource, or it may be indicated or configured to determine the target time-frequency resource according to a subset of the first time-frequency resource and/or a subset of the second time-frequency resource, etc., without limitation here.

It should be noted that in this application, the target time-frequency resource may also be referred to as an effective UE-FD time-frequency resource. The target time-frequency resource may include a time domain resource and/or a frequency domain resource corresponding to the time domain resource, such as a UL subband and/or a downlink subband, etc., which is not limited here.

S220: Perform FD transmission based on the target time-frequency resources.

The FD transmission may be understood as the terminal being able to perform UL transmission and DL transmission at the same time. In this embodiment, there is no restriction on the types of the UL transmission and the DL transmission.

For example, the UL transmission may be, but is not limited to, a sounding reference signal (SRS) or a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) or a physical random access channel (PRACH), etc. The DL transmission may include, but is not limited to, a physical downlink control channel (PDCCH), a semi-persistent scheduling (Semi-Persistent Scheduling, SPS) PDSCH, a channel state information reference signal (CSI-RS), etc.

In this embodiment, the terminal determines the target time-frequency resource for FD transmission based on the first time-frequency resource and/or the second time-frequency resource, and then performs FD transmission based on the target time-frequency resource, which can not only achieve the purpose of enhancing coverage, reducing transmission delay, and improving resource utilization efficiency, but also improve the downlink or uplink throughput and improve the performance of the communication system.

As shown in Figure 3, it is a flow chart of a communication method 300 provided by an exemplary embodiment of the present application, and the method 300 can be, but is not limited to, executed by a terminal, and specifically can be executed by hardware and/or software installed in the terminal. In this embodiment, the method 300 can at least include the following steps.

S310. The terminal determines a target time-frequency resource according to the first time-frequency resource and/or the second time-frequency resource.

Among them, the first time-frequency resource is a time-frequency resource used for the network side device to perform FD transmission and/or a time-frequency resource used by the terminal to perform half-duplex transmission, and the second time-frequency resource is a time-frequency resource used for the terminal to perform FD transmission.

S320: Perform FD transmission based on the target time-frequency resources.

It can be understood that, in addition to referring to the relevant description in method embodiment 200 for the implementation process of S310 and S320, as a possible implementation manner, the configuration manner of the first time-frequency resource and the second time-frequency resource can be multiple,

For example, for the first time-frequency resource, slot 1, slot 3, slot 4, slot 6, and slot 9 can be configured as shown in Figure 4a to support full-duplex operation on the network side, that is, in these time slots, the network side can apply full-duplex operation and/or the terminal side can apply half-duplex operation.

For another example, for the second time-frequency resource, slot 1, slot 4, and slot 6 can be configured as terminal full-duplex operation as shown in Figure 4a, that is, in these time slots, full-duplex operation is applied on the network side and full-duplex operation is applied on the terminal side.

Of course, for slots that are not configured for full-duplex operation of the terminal or full-duplex operation of the network side, such as slot 0, slot 2, slot 5, slot 7, and slot 8, the transmission mode of the terminal may be a conventional (legacy) mode. The conventional mode may be understood as: full DL transmission or full UL transmission in these slots or indicated by signaling as DL transmission or UL transmission, etc., which is not limited here.

Based on this, as a possible implementation method, the configuration method of the first time-frequency resource (i.e., GNB-FD time domain resource) can be: the period during which the network subband full-duplex is effective can be configured by the network, such as the period determined according to NR UL-DL Transmission Periodicity, that is, the period of TDD pattern 1 and the period of pattern 2 (if configured), P+P2. Among them, P and P2 can be configured as one of the values shown in Table 1 {ms0p5,ms0p625,ms1,ms1p25,ms2,ms2p5,ms5,ms10}.

Table 1

Table 2

In another implementation, the configuration method of the second time-frequency resource (i.e., UE-FD time domain resource) may be: the period during which the network subband full-duplex is effective may be configured by the network, such as the period determined according to NR UL-DL Transmission Periodicity, that is, the period of TDD pattern 1 and the period of pattern 2 (if configured), P+P2. Wherein, P and P2 may be configured as one of the values in Table 2 {ms0p5,ms0p625,ms1,ms1p25,ms2,ms2p5,ms5,ms10}.

It can be understood that the configuration method of the first time-frequency resources and the second time-frequency resources can be but is not limited to the above.

Based on this, for the target time-frequency resources, the process of determining the target time-frequency resources is described below in combination with the following implementation methods, as follows.

Implementation 1

Assuming that the protocol agrees, the high-level configuration or the network-side equipment is only configured with the first time-frequency resource but not the second time-frequency resource, then the process of the terminal determining the target time-frequency resource based on the first time-frequency resource may include at least one of the following (11)-(15), that is, in this implementation method 1, the valid UE-FD time-frequency resource is implicitly indicated by the first time-frequency resource.

(11) When the first time-frequency resource is a time-frequency resource of a specific cell (cell-specific), determine the first time-frequency resource as the target time-frequency resource.

Among them, the cell-specific time-frequency resources or a subset of the cell-specific time-frequency resources can be determined as the target time-frequency resources, so that the terminal can perform FD transmission based on the target time-frequency resources, that is, send and receive simultaneously.

(12) When the first time-frequency resource is a time-frequency resource of a specific terminal (UE-specific), determine the first time-frequency resource as the target time-frequency resource.

Among them, the UE-specific time-frequency resources or a subset of the UE-specific time-frequency resources can be determined as the target time-frequency resources, so that the terminal can perform FD transmission based on the target time-frequency resources, that is, send and receive simultaneously.

(13) In the case where the first time-frequency resource includes a cell-specific time-frequency resource and a frequency domain resource of a first guard band (GB), determining The target time-frequency resources, wherein the first GB is the cell-specific GB or the UE specific GB.

Among them, the target time-frequency resources can also be called effective UE-FD time-frequency resources. For the determination of the target time-frequency resources, the terminal can refer to the UL subband or DL subband in the first time-frequency resources configured by the network, or refer to both the DL subband and the UL subband in the first time-frequency resources.

For example, as shown in Figure 4b, assuming that the BWP bandwidth is 70 physical resource blocks (PRBs), the common resource block (CRB) numbering is used for ease of description, the starting PRB number is 3 (common PRB), and the resource position of the UL subband in the first time-frequency resource configured by the network side is PRB32 to PRB 47, a total of 16 PRBs.

In this case, assuming that the UL subband is used as a reference and the first GB is the PRBs on both sides of the UL subband, then the indication method of the first GB may include: {size 1 (lower frequency), size 2 (higher frequency)}. Among them, the first GB shown in FIG4b: {4, 4} indicates that the 4 low-frequency PRBs on the left side of the edge PRB 32 of the UL subband are used as GB3, and the 4 high-frequency PRBs on the right side of the edge PRB 47 of the UL subband are used as GB4.

Alternatively, it may also be assumed that the first GB: {0, ..., 273} indicates which PRBs are used as the first GB in a bitmap form.

For example, setting the bits {28, 29, 30, 31, 48, 49, 50, 51} to 1 indicates that these 8 PRBs are used as the first GB, and the UL subband or DL subband in the target time-frequency resource (i.e., the valid UL subband or DL subband) is the PRB in the UL subband or DL subband in the first time-frequency resource minus the PRB used as the first GB.

Further, for the configuration of the first frequency domain resources, the GB (i.e., the first GB) may be implicitly configured, such as configuring the UE-specific GB. Then, as shown in FIG4c, assuming that the first frequency domain resources include the frequency domain resources of the UL subband and/or DL subband 1, DL subband 2, and the size of the UE-specific GB (i.e., the first GB, such as GB1 and GB2 in FIG4c), then the target frequency domain resources determined by the terminal according to the first frequency domain resources and the first GB are shown in FIG4c. The network may be configured to subtract the GB from the UL subband or DL subband of the first frequency domain resources to determine the target frequency domain resources.

For the first GB mentioned above, the terminal can report the size of the first GB as the terminal capability to the network side to assist the network side in configuring the UL subband, DL subband and the size of the first GB to achieve appropriate scheduling or configuration of frequency domain resources and ensure transmission reliability.

(14) When the first time-frequency resources include cell-specific time-frequency resources and UE-specific time-frequency resources, determine the UE-specific time-frequency resources as the target time-frequency resources.

Among them, for cell-specific time-frequency resources and UE-specific time-frequency resources, considering that different terminals may use different services, the time-frequency resources they require may also be different. Therefore, in this embodiment, using UE-specific time-frequency resources as the target time-frequency resources can better match the service and capability requirements of the terminal and improve the communication performance of the communication system.

(15) In the case where the first time-frequency resources include cell-specific time-frequency resources and UE-specific time-frequency resources, determining the intersection of the cell-specific time-frequency resources and the UE-specific time-frequency resources as the For example, the intersection of the frequency domain PRBs of the UL subband in the cell-specific time-frequency resources and the UL subband in the UE-specific time-frequency resources, and/or the intersection of the frequency domain PRBs of the DL subband in the cell-specific time-frequency resources and the DL subband in the UE-specific time-frequency resources may be determined as the target time-frequency resources, and this embodiment is not limited here.

In this implementation method 1, the first time-frequency resource is used to implicitly indicate the effective UE-FD time-frequency resource, so that the terminal can determine the target time-frequency resource based on the first time-frequency resource, and then implement FD transmission based on the target time-frequency resource, which can greatly improve the DL or UL throughput, improve system resource utilization and reduce latency.

Implementation 2

Assuming that the protocol agreement, high-level configuration or network-side equipment is only configured with the second time-frequency resource but not the first time-frequency resource, then the process of the terminal determining the target time-frequency resource according to the second time-frequency resource may include at least one of the following (21)-(25). That is, in this implementation mode 2, the valid UE-FD time-frequency resource is explicitly indicated by the second time-frequency resource.

(21) When the second time-frequency resource is a cell-specific time-frequency resource, determine the cell-specific time-frequency resource as the target time-frequency resource.

Among them, the cell-specific time-frequency resources or a subset of the cell-specific time-frequency resources can be determined as the target time-frequency resources, so that the terminal can perform FD transmission based on the target time-frequency resources, that is, send and receive simultaneously.

(22) When the second time-frequency resource is a UE-specific time-frequency resource, determine the UE-specific time-frequency resource as the target time-frequency resource.

Among them, the UE-specific time-frequency resources or a subset of the UE-specific time-frequency resources can be determined as the target time-frequency resources, so that the terminal can perform FD transmission based on the target time-frequency resources, that is, send and receive simultaneously.

(23) In the case where the second time-frequency resources include cell-specific time-frequency resources and frequency domain resources of a second GB, the target time-frequency resources are determined according to the cell-specific time-frequency resources and the frequency domain resources of the second GB, wherein the second GB is a cell-specific GB or a UE-specific GB.

It can be understood that for different terminals, their self-interference elimination capabilities may be different, and therefore, the corresponding second GBs of different terminals may be different. For example, as shown in FIG4d, GB 1 of terminal 1 (UE1) and GB2 of terminal 2 (UE2) may be different, and the network-side device may configure the corresponding second GB for it according to the UE's self-interference elimination capability. Of course, for the second GB, the terminal may report the size of the second GB as the terminal capability to the network side to assist the network side in configuring the size of the UL subband, DL subband and the second GB, so as to achieve appropriate scheduling or configuration of frequency domain resources.

In addition, regarding the method of determining the target time-frequency resources based on the cell-specific time-frequency resources and the frequency domain resources of the second GB, please refer to the relevant description in the above (13). To avoid repetition, it will not be repeated here.

(24) When the second time-frequency resources include cell-specific time-frequency resources and UE-specific time-frequency resources, determine the UE-specific time-frequency resources as the target time-frequency resources.

Among them, for cell-specific time-frequency resources and UE-specific time-frequency resources, considering that different terminals may use different services, the time-frequency resources they require may also be different. The time-frequency resources as the target time-frequency resources can better match the business and capability requirements of the terminal and improve the communication performance of the communication system.

Optionally, the terminal may determine part or all of the UE-specific time-frequency resources as the target time-frequency resources, and perform FD transmission based on the target time-frequency resources.

(25) In the case where the second time-frequency resources include cell-specific time-frequency resources and UE-specific time-frequency resources, the intersection of the cell-specific time-frequency resources and the UE-specific time-frequency resources is determined as the target time-frequency resources. For example, the intersection of the UL subband in the cell-specific time-frequency resources and the frequency-domain PRBs of the UL subband of the UE-specific time-frequency resources, and/or the intersection of the DL subband in the cell-specific time-frequency resources and the frequency-domain PRBs of the DL subband of the UE-specific time-frequency resources can be determined as the target time-frequency resources.

In this embodiment, in addition to determining the intersection of the cell-specific time-frequency resources and the UE-specific time-frequency resources as the target time-frequency resources, as a possible implementation method, when the second time-frequency resources include cell-specific time-frequency resources and UE-specific time-frequency resources, considering that any UL transmission and DL transmission can occur simultaneously on the cell-specific time-frequency resources, the terminal can also determine the cell-specific time-frequency resources as the target time-frequency resources for FD transmission.

It should be noted that in this implementation method 2, for the second time-frequency resources, if they are provided by the network side device, then the network side device can configure the cell-specific time-frequency resources in the second time-frequency resources through cell-specific signaling, and notify the terminal based on the system information block (System Information Block, SIB) signaling that all terminals located in the cell have the same second time-frequency resources, that is, the cell-specific time-frequency resources.

Of course, the network side device can also configure UE-specific time-frequency resources in the second time-frequency resources through UE-Specific radio resource control (Radio Resource Control, RRC) signaling, that is, each terminal located in the same cell can have different or the same second time-frequency resources.

In this implementation method 2, the effective UE-FD time-frequency resources are explicitly indicated through the second time-frequency resources, so that the terminal can determine the target time-frequency resources based on the second time-frequency resources, and then implement FD transmission based on the target time-frequency resources, which can greatly improve the DL or UL throughput, improve system resource utilization and reduce latency.

Implementation 3

Assuming that the first time-frequency resource and the second time-frequency resource are configured by protocol agreement, high-level configuration or network-side equipment, the terminal can obtain first indication information (also referred to as FD mode signaling), and determine whether to operate in the first mode (also referred to as GNB-FD mode) or the second mode (also referred to as UE-FD mode) on the first time domain unit according to the first indication information. The first mode is to determine the target time-frequency resource according to the first time-frequency resource, and the second mode is to determine the target time-frequency resource according to the second time-frequency resource.

That is to say, for the same time domain unit configured with the first time-frequency resource and the second time-frequency resource at the same time, the terminal can determine the FD mode according to the first indication information, such as whether to determine the target time-frequency resource according to the first time-frequency resource or the second time-frequency resource. It should be noted that the time domain units mentioned in the context of this application can be time slots, symbols, frames, etc., and are not limited here.

In this embodiment, there may be multiple ways to carry the first indication information. For example, the first indication information may be carried by at least one of the following (a)-(c).

(a) Group common downlink control information (Downlink Control Information, DCI).

Wherein, if the first indication information is carried by a group common DCI, the control resource set (Control resource set, Coreset) and search space for periodically monitoring the DCI can be configured by the network. For DCI carried by a group common DCI, a group of UEs periodically monitoring FD-mode signaling can be configured as shown in Table 3.

table 3

Among them, "0" in Table 3 represents GNB-FD slot, "1" represents UE-FD slot, or "1" represents GNB-FD slot, "0" represents UE-FD slot. Assuming that "0" represents GNB-FD slot and "1" represents UE-FD slot, then, when the FD-mode signaling received by the terminal in time slot 1 is 0, the terminal can determine the target time-frequency resource according to the second time-frequency resource.

It can be understood that the time slot numbers in Table 3 are configured by the network for a certain subcarrier spacing and CP size, and these time slots are time slots configured by the network for applying FD operation. If a time slot is to be indicated to apply non-FD operation, additional indication is required, for example, a time slot indication 'x' indicates that non-FD operation is applied.

(b)UE specific DCI.

The UE specific DCI refers to the DCI dedicated to the terminal.

(c) Medium Access Control Element (MAC CE).

Among them, if the first indication information is carried by the UE-specific DCI and MAC CE described in (b) and (c) above, then an index table as shown in Table 4 can be configured by protocol agreement or high-level configuration or network configuration, so that the FD mode of each slot in a cycle can be indicated by the first indication information (through DCI or MAC CE), such as working in the first mode or the second mode.

Table 4

It should be noted that, in this embodiment, the size of the DCI carrying the first indication information (such as UE-specific DCI or group-common DCI) can be the same as the payload size of an existing DCI in the related art, for example, aligned with the payload size of the slot format indicator (SFI), for example, a maximum of n bits, where n can be 128 bits. Of course, if a DCI carrying the first indication information (such as UE-specific DCI or group-common DCI) does not match the aligned DCI payload size, the purpose of bit alignment can be achieved by padding bits.

Alternatively, if the size of the DCI carrying the first indication information (such as UE specific DCI or group common DCI) is the same as the size of other DCIs, the network may configure a dedicated radio network temporary identifier (Radio Network Temporary Identifier). Temporary Identifier (RNTI), scrambles the DCI carrying the first indication information to distinguish the DCI carrying the first indication information from other DCIs of the same payload size. Optionally, the dedicated RNTI may be the FD mode-RNTI introduced in this application, etc., which is not limited here.

Further, as a possible implementation, the DCI carrying the first indication information may include the first indication information of multiple carriers, for example, in the DCI, a FD mode position may be configured for each terminal (group), each carrier, and each BWP. For example, as shown in FIG4e, taking the carrier granularity as an example, all BWPs on the same carrier use the same FD mode, such as the first mode or the second mode, while BWPs on different carriers (such as carrier 1, carrier 2, etc.) may use the same or different FD modes.

As a possible implementation method, in this embodiment, in addition to indicating the FD mode of the terminal through the first indication information, such as whether to work in the first mode or the second mode, the time domain indication information of the FD mode can also be configured. For example, the time domain indication information of the FD mode can include at least one of the following (31)-(32).

(31) Monitoring period of FD mode.

Among them, at least one of the monitoring period, offset, and monitoring pattern of the DCI carrying the FD mode (i.e., the first indication information) can be determined by protocol agreement, high-level configuration, or network configuration.

Optionally, the monitoring period may be a time slot granularity, such as [1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 160, 320, 640, 1280, 2560] slot, or a symbol granularity, such as 2 symbols, 7 symbols, etc., which is not limited here.

(32)The duration of FD mode.

The configuration method of the FD mode action time includes the following method 1 and/or method 2:

Mode 1: The FD mode action time is configured according to a predefined rule or network. For example, the network side can configure the FD mode action time as the monitoring period of the DCI carrying the FD mode. That is, if the terminal receives a DCI carrying the FD mode at a monitoring time, then the FD mode action time starts from receiving the DCI and lasts until the terminal receives a new DCI carrying the FD mode.

Mode 2: The network side may additionally configure the action time of FD mode to explicitly indicate the action time of FD mode. For example, the DCI carrying FD mode may include an action time indication field. For example, for a UE (group) or a carrier or a BWP, the configuration of the DCI carrying FD mode is shown in FIG4f , and the duration of the terminal monitoring FD mode 1 is x1, the duration of FD mode 2 is x2, and the duration of FD mode 3 is x3.

Based on this, assuming that a UE (group) is configured to monitor the DCI carrying the FD-mode indication, then if the terminal monitors the DCI, it can simultaneously transmit and receive in each time domain unit according to the FD-mode (such as the first mode or the second mode) carried by the DCI.

Alternatively, if the terminal does not monitor the DCI carrying the FD-mode indication, the terminal may determine the target time-frequency resources according to the first time-frequency resources by default, or the terminal may determine the target time-frequency resources according to the second time-frequency resources by default, or the terminal may determine the full-duplex mode on a time domain unit for transmission and reception based on dynamic scheduling and uplink/downlink transmission configured by high-level layers. This embodiment does not impose any restrictions here.

Further, in this embodiment, the FD mode validation time (Validation/application time) may be T _proc,2 symbols after the last symbol of the PDCCH carrying the FD mode. The PUSCH processing capability (processing capability 2) T _proc,2 can be calculated by formula (1).
T _proc,2 =max((N ₂ +d _2,1 )(2048+144)·κ2 ^-μ ·T _C ,d _2,2 ) (1)

Wherein, d _2,1 =d _offset □ 2 ^{-μ UL} /2 ^-μ , d _offset is obtained by delta_Offset, μ is the minimum value of the subcarrier spacing of the PDCCH and the minimum subcarrier configuration μ _UL , and μ _UL is provided by the scs-SpecificCarrierList parameter of the higher layer parameter FrequencyInfoUL or FrequencyInfoUL-SIB.

In addition, the terminal does not expect to cancel PUSCH transmission or SRS transmission before monitoring the last symbol interval T _proc,2 (assuming d _2,1 =0) of the coreset carrying the PDCCH in the FD mode.

In this implementation method 3, by obtaining the first indication information and determining whether to work in the first mode or the second mode according to the first indication information, on the one hand, the terminal can clearly understand the method for determining the target time-frequency resources when configuring the first time-frequency resources and the second time-frequency resources at the same time; on the other hand, it can also ensure the consistency of the understanding of the target time-frequency resource determination method between the network side and the terminal, thereby ensuring communication performance.

Implementation 4

Assuming that the protocol agreement, high-level configuration or network-side equipment has not configured the first time-frequency resources and the second time-frequency resources for the terminal, the terminal can perform FD transmission on a time domain unit according to network dynamic scheduling (scheduled by DCI) or semi-static configuration (RRC configuration). For example, the network-side equipment provides second indication information to the terminal, and accordingly, the terminal obtains the second indication information and performs FD transmission on the fifth time domain unit according to the second indication information, that is, sending and receiving at the same time.

For example, the network side instructs the terminal to simultaneously transmit and receive on one or more time domain units (symbols or time slots) through the second indication information.

For another example, assuming that the network side configures or indicates, through the second indication information, that the terminal has channels or signals with different transmission directions in one or more time domain units, then the terminal can determine that simultaneous reception can be performed in the time domain unit.

In this implementation method 4, in the case where the first time-frequency resources and the second time-frequency resources are not configured, the terminal can ensure the reliability of transmission of the terminal by obtaining second indication information and performing FD transmission on the fifth time domain unit according to the second indication information.

As shown in Figure 5, it is a flow chart of a communication method 500 provided by an exemplary embodiment of the present application, and the method 500 can be, but is not limited to, executed by a terminal, and can be specifically executed by hardware and/or software installed in the terminal. In this embodiment, the method 500 can at least include the following steps.

S510: The terminal determines a target time-frequency resource according to the first time-frequency resource and/or the second time-frequency resource.

Among them, the first time-frequency resource is a time-frequency resource used for the network side device to perform FD transmission and/or a time-frequency resource used by the terminal to perform half-duplex transmission, and the second time-frequency resource is a time-frequency resource used for the terminal to perform FD transmission.

It can be understood that the implementation process of S510 can refer to the relevant description in the aforementioned method embodiments 200-300, and will not be repeated here.

S520: Perform FD transmission based on the target time-frequency resources.

It can be understood that, in addition to referring to the relevant descriptions in the aforementioned method embodiments 200-300, the implementation process of S520, as a possible implementation method, for a communication device, since simultaneous reception (such as UL or DL) and transmission (such as DL or UL) will cause self-interference, in order to ensure transmission in the interfered direction and avoid self-interference, the communication device needs to have the ability to eliminate self-interference to reduce the intensity of self-interference. In this regard, a guard band can be reserved between the UL subband and the DL subband to reduce frequency domain self-interference, for example, a GB is set between the UL subband and the DL subband to achieve frequency isolation.

However, considering that the terminal's self-interference elimination capability is weaker than that of the network side (gNB side), as shown in Figure 6a, for simultaneous transmission and reception on the terminal side (i.e., FD transmission), the GB required to be reserved is larger than that on the network side, that is, more PRBs are required to be reserved for the terminal as protection bands. Among them, for the network full-duplex mode, in the UL subband, the network side device receives the UL channel or signal sent by the terminal, and in the DL subband, the network provides the terminal with a DL channel or signal, and the DL signal will cause self-interference to the UL signal.

For a terminal in full-duplex mode, the UL transmission of the terminal may generate self-interference to the DL transmission.

It should be noted that for different terminals, since their self-interference cancellation capabilities may be different, the corresponding GBs may be different. In this embodiment, the terminal may report the size of the GB as terminal capability information to the terminal, so that the network side performs more appropriate scheduling or configuration.

Based on this, the process of the terminal performing FD transmission based on the target time-frequency resources will be described below in combination with the following implementation methods, as follows.

Implementation 1

In the case that an uplink UL subband and a downlink DL subband are not configured in the target time-frequency resource, the terminal may perform at least one of the following (41)-(43).

(41) Perform FD transmission on a flexible time domain unit or subset in the target time-frequency resource.

(42) Perform FD transmission in all time domain units of the target time-frequency resource.

(43) Perform the FD transmission on a subset of all time domain units in the target time-frequency resource.

Among them, all the time domain units mentioned in the above (42)-(43) include uplink time domain units, downlink time domain units, and Flexible time domain units. In addition, the subset of the time domain unit can be understood as a partial time domain unit of the time domain unit. For example, assuming that all the time domain units include slot 1, slot 2, slot 3, slot 4, slot 5, slot 6, slot 7, and slot 8, then its subset can be {slot 1, slot 2, slot 3} or {slot 1, slot 2, slot 3, slot 7, slot 8}, etc., without limitation here.

In addition to the foregoing situation, for a terminal supporting full-duplex capability, if the terminal is neither configured with a UL subband nor a DL subband, and a time domain unit indicated by a designated signaling (such as tdd-UL-DL-ConfigurationCommon, and tdd-UL-DL-ConfigurationDedicated signaling) is a flexible time domain unit, then the terminal does not expect to receive dedicated high-level parameters indicating simultaneous transmission and reception in the following (a) or (b) situations, thereby ensuring communication quality.

(a) The frequency domain resources for UL transmission overlap with the frequency domain resources for DL reception.

(b) A minimum frequency interval between a frequency domain resource for UL transmission and a frequency domain resource for DL reception is smaller than a first threshold.

Optionally, the aforementioned first threshold may be determined by protocol agreement, high-level configuration, or network-side configuration, which is not limited here.

Implementation 2

For the second time domain unit, when the UL subband and DL subband corresponding to the second time domain unit are configured in the target time-frequency resource, the terminal performs at least one of the following (51)-(54). The second time domain unit and the third time domain unit, the fourth time domain unit, etc. mentioned later all support simultaneous transmission and reception of the terminal. In addition, the second time domain unit and the third time domain unit, the fourth time domain unit, etc. mentioned later can be the time domain unit in the target time domain resource, or can be the time domain unit scheduled or configured by the network side to support simultaneous transmission and reception of the terminal, and no limitation is made here.

(51) When the minimum frequency domain interval between the UL subband and the DL subband is not less than a first threshold, the terminal considers that UL transmission whose frequency domain resources fall within the UL subband and DL transmission whose frequency domain resources fall within the DL subband are valid transmissions, and performs FD transmission based on the UL subband and the DL subband.

(52) When the minimum frequency domain interval between the UL subband and the DL subband is less than a first threshold, and the frequency domain resource interval between the uplink frequency domain resources corresponding to the UL transmission and the downlink frequency domain resources corresponding to the DL transmission is not less than the first threshold, the terminal considers that the UL transmission falling within the UL subband and the DL transmission falling within the DL subband are valid transmissions, and performs FD transmission based on the UL subband and the DL subband.

It can be understood that the aforementioned "frequency domain resource interval" refers to the interval between the lowest frequency of resources configured or indicated in one transmission direction (such as UL) and the highest frequency of resources configured or indicated in another opposite transmission direction (such as DL).

(53) When the minimum frequency domain interval between the UL subband and the DL subband is less than a first threshold, the terminal regards the UL subband and the DL subband as an error case, or regards the UL subband and the DL subband as invalid configurations, and cancels or ignores the FD transmission, that is, the terminal neither sends nor receives.

That is, the terminal does not expect channels or signals of different transmission directions (such as UL transmission and DL transmission) to overlap or the minimum frequency domain interval between different transmission directions to be less than the first threshold, that is, the network side will not configure or instruct the terminal to perform FD transmission.

(54) When the minimum frequency domain interval between the UL subband and the DL subband is less than a first threshold, the terminal may determine and perform transmission in one direction, such as UL transmission or DL transmission, according to a predetermined rule predetermined by the protocol, high-level configuration, or network side configuration.

The predetermined rule may be, but is not limited to, that the terminal transmits a transmission with a higher transmission priority, such as when a DL transmission has a higher priority, the terminal transmits the DL transmission, or when a UL transmission has a higher priority, the terminal transmits the UL transmission.

As shown in Figure 6b, the aforementioned first threshold may be x PRBs, which represents the interval GB between the lowest frequency of the resources configured or indicated in one transmission direction (such as UL) and the highest frequency of the resources configured or indicated in another opposite transmission direction (such as DL). As long as it is not less than x PRBs (i.e., the first threshold), the terminal can eliminate self-interference and perform FD transmission, i.e., transmit and receive simultaneously.

Optionally, the UL transmission or DL transmission may be, but is not limited to, a semi-statically configured signal or channel, such as a configured Configured Grant (CG) PUSCH, Semi-Persistent Scheduling (SPS) PDSCH, UL SRS, Channel State Information Reference Signal (CSI-RS), etc.

In this case, as a possible implementation method, for the second time domain unit, when the UL subband and DL subband corresponding to the second time domain unit are configured in the target time-frequency resource, the terminal expects DL transmission to be indicated or configured in the DL subband, UL transmission is indicated or configured in the UL subband, and the minimum frequency domain interval between the UL subband and the DL subband is not less than a first threshold, then the terminal can simultaneously transmit and receive in the UL subband and the DL subband.

For example, as shown in Figure 6c, the network configures a UL subband and a DL subband for the terminal. In a time domain unit such as slot n, the network configures or instructs the terminal to have a UL transmission and a DL transmission, wherein the UL transmission is in the UL subband and the DL transmission is in the DL subband. The interval GB (x PRB) between the UL subband and the DL subband meets the UE's self-interference elimination requirement. If GB is not less than the first threshold, then in this slot n, the terminal can transmit and receive simultaneously, and the self-interference can be processed by the terminal.

Optionally, this implementation method 2 can be applied to the DL subband and UL subband configured as {DL subband, UL subband, DL subband} mode or {UL subband, DL subband, UL subband} mode, that is, the target frequency domain resources.

Implementation 3

For the third time domain unit, when only the UL subband corresponding to the third time domain unit is configured in the target time-frequency resource, the terminal performs at least one of the following (61)-(62). The third time domain unit supports simultaneous transmission and reception of the terminal.

(61) When the interval between the UL subband and the downlink frequency domain resources used for DL transmission (ie, the minimum frequency interval) is not less than a second threshold, FD transmission is performed.

That is to say, the terminal expects the UL transmission configured or indicated by the network side to appear in the UL subband, and only when the interval between the resources of the indicated or configured DL transmission and the UL subband is not less than the second threshold (such as y PRB), the terminal can send UL transmission in the UL subband and receive DL transmission at the same time.

The minimum frequency interval may be defined as follows (a) and/or (b).

(a) As shown in Figure 6d, if the frequency of the transmission resource of DL transmission (i.e., the downlink frequency domain resource) is lower than the frequency domain position of the UL subband, then the interval between the highest frequency of the transmission resource of DL transmission and the lowest frequency domain resource of the UL subband is not less than the second threshold (i.e., as GB), then the terminal can transmit and receive simultaneously.

(b) As shown in Figure 6e, if the frequency of the transmission resources of DL transmission (i.e., downlink frequency domain resources) is higher than the frequency domain position of the UL sub-band, then the interval between the lowest frequency of the transmission resources of DL transmission and the highest frequency domain resources of the UL sub-band is not less than the second threshold (i.e., as GB), then the terminal can transmit and receive simultaneously.

Optionally, the UL subband may be configured in the middle of the frequency domain or on both sides of the frequency domain.

(62) When the interval between the UL transmission falling in the UL subband and the downlink frequency domain resources used for DL transmission is not less than a second threshold and the DL transmission is located outside the UL subband, FD transmission is performed.

That is, as shown in FIG. 6f , the terminal expects the UL transmission configured or indicated by the higher layer to appear in the UL subband. Only when the interval between the indicated or configured downlink frequency band resources of DL transmission and UL transmission (such as the minimum frequency interval) is not less than the second threshold and the DL transmission falls outside the UL subband, the terminal can send UL transmission in the UL subband and receive DL transmission at the same time.

It can be understood that the aforementioned second threshold (such as y PRB) can be implemented by network side configuration, protocol agreed high-level configuration, etc.

Implementation 4

For the fourth time domain unit, when only DL subbands corresponding to the four time domain units are configured in the target time-frequency resources, the terminal may perform at least one of the following (71)-(72). The third time domain unit supports simultaneous transmission and reception of the terminal.

(71) When the interval between the DL subband and the uplink frequency domain resources used for UL transmission is not less than a third threshold, FD transmission is performed.

That is, the terminal expects the DL transmission configured or indicated by the high-level layer to appear in the DL subband. Only when the interval between the uplink frequency domain resources corresponding to the indicated or configured UL transmission and the DL subband (such as the minimum frequency interval) is not less than the third threshold, then the terminal can receive the DL transmission in the DL subband and transmit the UL transmission at the same time.

The minimum frequency interval may be defined as follows (a) and/or (b).

(a) As shown in Figure 6g, if the frequency of the transmission resources of UL transmission (i.e., uplink frequency domain resources) is lower than the frequency domain position of the DL subband, then the interval between the highest frequency of the transmission resources of UL transmission and the lowest frequency domain resources of the DL subband is not less than the third threshold (i.e., as GB), then the terminal can transmit and receive simultaneously.

(b) As shown in Figure 6h, if the frequency of the transmission resources of UL transmission (i.e., uplink frequency domain resources) is higher than the frequency domain position of the DL subband, then the interval between the lowest frequency of the transmission resources of UL transmission and the highest frequency domain resources of the DL subband is not less than the third threshold (i.e., as GB), then the terminal can transmit and receive simultaneously.

(72) When the interval between the DL subband and the frequency domain resources used for UL transmission is not less than a third threshold and the UL transmission is located outside the DL subband, perform FD transmission.

That is, as shown in Figure 6i, the terminal expects the DL transmission configured or indicated by the high-level layer to appear in the DL subband. Only when the interval between the indicated or configured uplink frequency domain resources for UL transmission and the downlink frequency domain resources for DL transmission (such as the minimum frequency domain interval) is not less than the third threshold and the UL transmission falls outside the DL subband, then the terminal can receive the DL transmission in the DL subband and send the UL transmission at the same time.

It is understandable that the aforementioned third threshold (such as z PRB) can be implemented by network side configuration, protocol agreed high-level configuration, etc.

Implementation 5

In one implementation, when the terminal performs FD transmission based on the target time-frequency resource, when the UL transmission and DL transmission based on the target time-frequency resource overlap on the target time domain resource or the minimum frequency domain interval of the transmission resource (which can be understood as the frequency domain resource) is less than GB, the terminal determines to transmit the UL transmission or/or DL transmission according to the transmission priority or the type of the transmission signal. The target time domain resource belongs to the target time-frequency resource.

For example, the transmission signal corresponding to the DL transmission is a designated signal (such as a synchronization signal block (Synchronization signal block) Signal Block, SSB), etc.), then the terminal transmits the DL transmission, abandons or delays the UL transmission.

For another example, if the priority of DL transmission is higher than that of the UL transmission, the terminal may receive the high-priority DL transmission and delay or abandon the low-priority UL transmission.

For another example, if the priority of the DL transmission is lower than that of the UL transmission, the terminal may send the high-priority UL transmission and abandon or delay the low-priority DL transmission.

It should be noted that the UL transmission (or DL transmission) in this implementation method can be based on the time domain resources and/or frequency domain resources in the target time-frequency resources, or it can be based on the scheduling or configuration on the network side, and there is no limitation here.

Implementation 6

In the related art, for a terminal operating in a single-carrier TDD spectrum (unpaired spectrum), if the terminal is configured by a high layer to receive DL transmissions on a symbol set of a slot, such as PDCCH, PDSCH or CSI-RS, and the terminal does not receive a DCI format (0_0, 0_1, 1_0, 1_1, 2_3) indicating uplink transmission, then the terminal will receive DL transmissions. Otherwise, if the terminal receives a DCI format (0_0, 0_1, 1_0, 1_1, 2_3) indicating uplink transmission, then the terminal does not receive DL transmissions on these symbol sets.

In the present application, for a terminal supporting full-duplex capability, the transmission scenario of the terminal includes at least one of the following (81)-(84).

(81) Assuming that the terminal is not configured with UL subband and DL subband, then: if the terminal is configured by the high-level layer to receive DL transmission, and the terminal does not receive DCI format (0_0, 0_1, 1_0, 1_1, 2_3) indicating the sending of UL transmission, then the terminal will receive DL transmission; conversely, if the terminal receives DCI format (0_0, 0_1, 1_0, 1_1, 2_3) indicating the sending of UL transmission, and the indicated uplink transmission resources overlap with the downlink transmission resources configured by the high-level layer or the minimum frequency interval between the two (i.e., GB) is less than the first threshold, then the terminal does not receive DL transmission and only sends UL transmission; or, if the terminal receives DCI format (0_0, 0_1, 1_0, 1_1, 2_3) indicating the sending of UL transmission, and the minimum frequency interval between the indicated uplink transmission resources and the downlink transmission resources configured by the high-level layer (i.e., GB) is greater than or equal to the first threshold, then the terminal simultaneously receives DL transmission (such as PDCCH, PDSCH or CSI-RS) and sends UL transmission.

(82) Assuming that the terminal is only configured with a UL subband, the processing method of the terminal can refer to the relevant description in the aforementioned implementation method 3, which will not be repeated here.

(83) Assuming that the terminal is only configured with a DL subband, the processing method of the terminal can refer to the relevant description in the aforementioned implementation method 4, which is not repeated here.

(84) Assuming that the terminal is configured with a UL subband and a DL subband, the processing method of the terminal can refer to the relevant description in the aforementioned implementation method 2, which will not be repeated here.

It should be noted that this is only an example. In actual communication, the time domain unit in this implementation may be, but is not limited to, the aforementioned slot, and may also be, for example, a symbol, a frame, and the like.

Implementation 7

In the related art, for a terminal operating in a single-carrier TDD spectrum, it is assumed that the terminal is configured by a high layer in a The symbol set of each slot sends UL transmission, such as SRS, PUCCH, PUSCH, PRACH, etc., and the terminal receives DCI format (1_0, 1_1, 0_1) indicating reception of DL transmission, such as CSI-RS or PDSCH, then:

If the first symbol of a symbol set appears within T _proc,2 after the last symbol of the Coreset of these DCI formats monitored by the terminal, then the terminal does not want to cancel the UL transmission on this symbol set; otherwise, the UL transmission on this symbol set can be canceled.

If a symbol set appears within T _proc,2 after the last symbol of the Coreset of these DCI formats monitored by the terminal, then the terminal does not expect to cancel the SRS on the subset of this symbol set, otherwise, the terminal cancels the SRS of the remaining symbols of this symbol subset. Wherein, T _proc,2 corresponds to the terminal processing capability assumption d _2,1 =1, μ corresponds to the SCS configuration of the PDCCH carrying the DCI format and the SCS configuration of SRS, PUCCH, PUSCH, μ _r , where μ _r corresponds to the SCS configuration of PRACH (if 15kHz or higher), otherwise μ _r =0.

In this application, for a terminal supporting full-duplex capability, it is assumed that the terminal is not configured with UL subband and DL subband, and is configured by a high layer to send SRS or PUCCH or PUSCH or PRACH, and the terminal receives a DCI format (1_0, 1_1, 0_1) indication, then:

If the indicated uplink transmission resource (used to send SRS or PUCCH or PUSCH or PRACH) overlaps with the downlink transmission resource frequency configured by the higher layer or the minimum frequency interval (i.e. GB) between the two is less than the first threshold, the terminal does not expect to cancel the PUCCH or PUSCH or PRACH on a symbol set, where the first symbol of this symbol set appears within T _proc,2 after the last symbol of the Coreset of these DCI formats monitored by the terminal, otherwise the symbol set of PUCCH or PUSCH or PRACH can be cancelled

Alternatively, if a symbol of a symbol subset appears within T _proc,2 after the last symbol of the Coreset of these DCI formats monitored by the terminal, then the terminal does not expect to cancel the SRS on the symbol of the symbol subset, and cancel the SRS of the remaining symbols of this symbol subset. Wherein, T _proc,2 corresponds to the terminal processing capability assumption d _2,1 =1, μ corresponds to the SCS configuration of the PDCCH carrying the DCI format and the SCS configuration of SRS, PUCCH, PUSCH, μ _r , μ _r corresponds to the SCS configuration of PRACH (if 15kHz or higher), otherwise μ _r =0.

If the minimum frequency interval (ie GB) between the indicated downlink transmission resource and the uplink transmission resource frequency configured by the higher layer is greater than or equal to the first threshold, then the terminal receives DL transmission and sends UL transmission simultaneously.

Assuming that the terminal is only configured with a UL subband, the processing method of the terminal can refer to the relevant description in the aforementioned implementation method 3, which will not be repeated here.

Assuming that the terminal is only configured with a DL subband, the processing method of the terminal can refer to the aforementioned implementation method. The relevant description in Formula 4 will not be repeated here.

Assuming that the terminal is configured with a UL subband and a DL subband, the processing method of the terminal may refer to the relevant description in the aforementioned implementation method 2, which will not be repeated here.

Based on the description of the aforementioned implementation methods 1 to 7, it can be known that for the UL subband and/or DL subband corresponding to the same time domain unit in the target time-frequency resource, the terminal performs at least one of the following (91)-(96).

(91) The desired UL transmission is indicated or configured in the UL subband.

It can be understood that the terminal expects the UL transmission to be indicated or configured in the UL subband, but the UL transmission configured or scheduled by the network side can be indicated or configured in the UL subband, and can also be configured or indicated outside the UL subband. Of course, according to the UL transmission actually configured or indicated by the network side, the terminal can process the UL transmission according to the aforementioned implementation methods 1 to 7. For example, if the UL transmission is indicated or configured in the UL subband, then the terminal can transmit the UL transmission based on the UL subband. Otherwise, the terminal can abandon, delay or ignore the UL subband, etc., which is not limited here.

(92) The desired DL transmission is indicated or configured in the DL subband.

Similar to the aforementioned (91), the terminal expects that the DL transmission is indicated or configured in the DL subband, but the DL transmission configured or scheduled by the network side can be indicated or configured in the DL subband, or can be configured or indicated outside the DL subband. Of course, according to the DL transmission actually configured or indicated by the network side, the terminal can process the DL transmission according to the aforementioned implementation methods 1 to 7. For example, if the DL transmission is indicated or configured in the DL subband, then the terminal can transmit the DL transmission based on the DL subband, otherwise, the terminal can abandon, delay or ignore the DL subband, etc., which is not limited here.

(93) It is expected that the GB between the UL subband and the DL subband is not less than a first threshold.

It can be understood that the terminal expects that the GB between the UL subband and the DL subband is not less than the first threshold, but the GB between the UL subband and the DL subband may be not less than the first threshold, and may also be greater than the first threshold. Of course, according to the actual GB size between the UL subband and the DL subband, the terminal may perform FD transmission according to the relevant descriptions in the aforementioned implementation methods 1 to 7.

(94) It is expected that the minimum frequency interval between the uplink frequency domain resources corresponding to UL transmission and the downlink frequency domain resources corresponding to DL transmission is not less than a first threshold, wherein the uplink frequency domain resources are located in the UL sub-band and the downlink frequency domain resources are located in the DL sub-band.

It can be understood that the terminal expects that the minimum frequency interval of the frequency domain resources corresponding to the UL transmission and the DL transmission is not less than the first threshold, but the minimum frequency interval of the frequency domain resources corresponding to the UL transmission and the DL transmission configured or scheduled by the network side may be not less than the first threshold, or may be less than the first threshold. Of course, depending on whether the minimum frequency interval of the frequency domain resources corresponding to the UL transmission and the DL transmission is not less than the first threshold, the terminal may process it according to the aforementioned implementation methods 1 to 7, and no limitation is made here.

(95) In the case where only the UL subband is configured, it is expected that DL transmission is located outside the UL subband.

It can be understood that the terminal expects the DL transmission to be indicated or configured outside the UL sub-band, but the DL transmission configured or scheduled by the network side can be indicated or configured outside the UL sub-band, and can also be configured or indicated in In this embodiment, the terminal may perform DL transmission according to the actual relationship between the DL transmission and the UL subband. For details, please refer to the relevant descriptions in the aforementioned implementation manners 1 to 7, which will not be repeated here.

(96) When only the DL subband is configured, UL transmission is expected to be outside the DL subband.

It can be understood that the terminal expects the UL transmission to be indicated or configured outside the DL subband, but the UL transmission configured or scheduled by the network side can be indicated or configured outside the DL subband, or can be configured or indicated within the DL subband. In this embodiment, the terminal can perform UL transmission according to the actual relationship between the UL transmission and the DL subband. For details, please refer to the relevant descriptions in the aforementioned implementation methods 1 to 7, which will not be repeated here.

Further, in the present application, in addition to the full-duplex transmission in the aforementioned method embodiments 200-500, when the UL transmission and/or the DL transmission is a designated transmission, according to the network side configuration or protocol reservation, the terminal can transmit the designated transmission based on the first time-frequency resource; or fall back to the normal mode to transmit the designated transmission. The UL transmission and/or the DL transmission is an FD transmission based on the target time-frequency resource, or the UL transmission and/or the DL transmission is an FD transmission based on the second indication information.

That is to say, for some important uplink/downlink transmissions (ie, designated transmissions), the network side can schedule or configure them in time domain units that are not configured with full-duplex, such as DL time slots, UL time slots, Flexible time slots, etc.

For example, for some important uplink/downlink transmissions, the network side may schedule or configure the time domain unit corresponding to the first time-frequency resource.

For another example, for some important uplink and downlink transmissions, in order to protect some important uplink/downlink transmissions, the terminal can fall back to half-duplex operation. For example, when the terminal transmits SSB based on the target time-frequency resource, the terminal only receives SSB, or, if a terminal simultaneously performs high-priority DL transmission and low-priority UL transmission, the terminal only receives high-priority DL transmission, or, if a terminal simultaneously performs high-priority UL transmission and low-priority DL transmission, the terminal only sends high-priority UL transmission.

In this embodiment, the terminal determines the transmission mode of UL transmission and DL transmission according to different situations of configuring subbands in the target time-frequency resources, which can not only solve the configuration of full-duplex operation of the terminal, which is beneficial to improving system resource utilization and reducing latency, but also ensure the reliability of transmission.

As shown in Figure 7, it is a flow chart of a communication method 700 provided by an exemplary embodiment of the present application. The method 700 can be, but is not limited to, executed by a network side device, and can be specifically executed by hardware and/or software installed in the network side device. In this embodiment, the method 700 can at least include the following steps.

S710, a network side device provides a first time-frequency resource and/or a second time-frequency resource to a terminal.

Among them, the first time-frequency resource is a time-frequency resource used for the network side device to perform FD transmission and/or a time-frequency resource used by the terminal to perform half-duplex transmission, and the second time-frequency resource is a time-frequency resource used for the terminal to perform FD transmission.

Optionally, the first time-frequency resources include cell-specific time-frequency resources and/or UE-specific time-frequency resources.

Optionally, the second time-frequency resources include cell-specific time-frequency resources and/or UE-specific time-frequency resources.

Optionally, the method further includes: providing first indication information and/or second indication information to the terminal; wherein, The first indication information is used to indicate whether to operate in the first mode or the second mode on the first time domain unit; wherein the first mode is to determine the time-frequency resources for FD transmission based on the first time-frequency resources, and the second mode is to determine the time-frequency resources for FD transmission based on the second time-frequency resources; the second indication information is used to indicate FD transmission on the fifth time domain unit.

It can be understood that the various implementation processes mentioned in the method embodiment 700 can refer to the relevant descriptions in the aforementioned method embodiments 200-500, and achieve the same or corresponding technical effects. To avoid repetition, they will not be described again here.

The communication methods 200-700 provided in the embodiments of the present application may be executed by a communication device. In the embodiments of the present application, the communication device provided in the embodiments of the present application is described by taking the communication method 200-700 executed by the communication device as an example.

As shown in FIG8 , it is a schematic diagram of the structure of a communication device 800 provided by an exemplary embodiment of the present application, and the device 800 includes: a determination module 810, configured to determine a target time-frequency resource according to a first time-frequency resource and/or a second time-frequency resource; a transmission module 820, configured to perform full-duplex FD transmission based on the target time-frequency resource;

Among them, the first time-frequency resource is a time-frequency resource used for the network side device to perform FD transmission and/or a time-frequency resource used by the terminal to perform half-duplex transmission, and the second time-frequency resource is a time-frequency resource used for the terminal to perform FD transmission.

Optionally, the determination module 810 determines the target time-frequency resource based on the first time-frequency resource, including at least one of the following: when the first time-frequency resource is a time-frequency resource of a specific cell cell-specific, determining the first time-frequency resource as the target time-frequency resource; when the first time-frequency resource is a time-frequency resource of a specific terminal UE-specific, determining the first time-frequency resource as the target time-frequency resource; when the first time-frequency resource includes cell-specific time-frequency resources and frequency domain resources of a first protection band GB, determining the target time-frequency resource according to the cell-specific time-frequency resources and the frequency domain resources of the first GB, wherein the first GB is a cell-specific GB or the UE-specific GB; when the first time-frequency resource includes cell-specific time-frequency resources and UE-specific time-frequency resources, determining the UE-specific time-frequency resource as the target time-frequency resource; when the first time-frequency resource includes cell-specific time-frequency resources and UE-specific time-frequency resources, determining the intersection of the cell-specific time-frequency resources and the UE-specific time-frequency resources as the target time-frequency resource.

Optionally, the determination module 810 determines the target time-frequency resource based on the second time-frequency resource, including at least one of the following: when the second time-frequency resource is a cell-specific time-frequency resource, determining the cell-specific time-frequency resource as the target time-frequency resource; when the second time-frequency resource is a UE-specific time-frequency resource, determining the UE-specific time-frequency resource as the target time-frequency resource; when the second time-frequency resource includes a cell-specific time-frequency resource and a frequency domain resource of a second GB, determining the target time-frequency resource according to the cell-specific time-frequency resource and the frequency domain resource of the second GB, wherein the second GB is a cell-specific GB or a UE-specific GB; when the second time-frequency resource includes a cell-specific time-frequency resource and a UE-specific time-frequency resource, determining the UE-specific time-frequency resource as the target time-frequency resource; when the second time-frequency resource includes a cell-specific time-frequency resource and a UE-specific time-frequency resource, determining the intersection of the cell-specific time-frequency resource and the UE-specific time-frequency resource as the target time-frequency resource.

Optionally, the determining module 810 determines the target time-frequency resource according to the first time-frequency resource and the second time-frequency resource, including: obtaining first indication information; determining whether to operate in the first mode or not on the first time domain unit according to the first indication information; It is the second mode; wherein, the first mode is to determine the target time-frequency resource based on the first time-frequency resource, and the second mode is to determine the target time-frequency resource based on the second time-frequency resource.

Optionally, the first indication information is carried by at least one of the following: group common downlink control information DCI; UE specific DCI; media access control control unit MAC CE.

Optionally, for the UL subband and/or DL subband corresponding to the same time domain unit in the target time-frequency resources, the determination module 810 is also used for at least one of the following: it is expected that UL transmission is indicated or configured in the UL subband; it is expected that DL transmission is indicated or configured in the DL subband; it is expected that the GB between the UL subband and the DL subband is not less than a first threshold; it is expected that the minimum frequency interval between the uplink frequency domain resources corresponding to the UL transmission and the downlink frequency domain resources corresponding to the DL transmission is not less than a first threshold, wherein the uplink frequency domain resources are located in the UL subband and the downlink frequency domain resources are located in the DL subband; when only the UL subband is configured, it is expected that the DL transmission is located outside the UL subband; when only the DL subband is configured, it is expected that the UL transmission is located outside the DL subband.

Optionally, the transmission module 820 performs FD transmission based on the target time-frequency resources, including: when no uplink UL subband and downlink DL subband are configured in the target time-frequency resources, performing at least one of the following: performing FD transmission on the Flexible time domain unit in the target time-frequency resources; performing FD transmission in all time domain units in the target time-frequency resources; performing FD transmission on a subset of all time domain units in the target time-frequency resources.

Optionally, the transmission module performs FD transmission based on the target time-frequency resources, including: for the second time domain unit, when the target time-frequency resources are configured with a UL subband and a DL subband corresponding to the second time domain unit, performing at least one of the following: performing FD transmission when the minimum frequency domain interval between the UL subband and the DL subband is not less than a first threshold; performing FD transmission when the minimum frequency domain interval between the UL subband and the DL subband is less than the first threshold but the interval between the uplink frequency domain resources corresponding to the UL transmission and the downlink frequency domain resources of the DL transmission is not less than the first threshold, wherein the uplink frequency domain resources corresponding to the UL transmission are located in the UL subband, and the downlink frequency domain resources corresponding to the DL transmission are located in the DL subband; when the minimum frequency domain interval between the UL subband and the DL subband is less than the first threshold, canceling or ignoring the FD transmission; when the minimum frequency domain interval between the UL subband and the DL subband is less than the first threshold, transmitting UL transmission or DL transmission.

Optionally, the transmission module 820 performs FD transmission based on the target time-frequency resources, including: for the third time domain unit, when only the UL subband corresponding to the third time domain unit is configured in the target time-frequency resources, performing at least one of the following: performing FD transmission when the interval between the UL subband and the downlink frequency domain resources used for DL transmission is not less than a second threshold; performing FD transmission when the interval between the UL subband and the downlink frequency domain resources used for DL transmission is not less than the second threshold and the DL transmission is located outside the UL subband.

Optionally, the transmission module 820 performs FD transmission based on the target time-frequency resources, including: for the fourth time domain unit, when only DL subbands corresponding to the four time domain units are configured in the target time-frequency resources, performing at least one of the following: performing FD transmission when the interval between the DL subband and the uplink frequency domain resources used for UL transmission is not less than a third threshold; performing FD transmission when the interval between the DL subband and the uplink frequency domain resources used for UL transmission is not less than a third threshold and the UL transmission is located outside the DL subband.

Optionally, the transmission module 820 performs FD transmission based on the target time-frequency resources, including: when UL transmission and DL transmission overlap on the target time domain resources, determining to transmit the UL transmission or/and DL transmission according to the transmission priority or the type of transmission signal; wherein the target time domain resources belong to the target time-frequency resources.

Optionally, the transmission module 820 is further used to: obtain second indication information when the first time-frequency resource and the second time-frequency resource are not configured; and perform FD transmission on the fifth time domain unit according to the second indication information.

Optionally, the transmission module 820 is also used to: when the UL transmission and/or the DL transmission is a designated transmission, perform at least one of the following: transmit the designated transmission based on the first time-frequency resources; fall back to the normal mode to transmit the designated transmission; wherein the UL transmission and/or the DL transmission is an FD transmission based on the target time-frequency resources, or the UL transmission and/or the DL transmission is an FD transmission based on the second indication information.

Optionally, the designated transmission includes at least one of the following: synchronization signal block SSB; control resource set coreset 0; valid PRACH; transmission with specified priority.

The communication device 800 in the embodiment of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or it can be other devices other than a terminal. Exemplarily, the terminal can include but is not limited to the types of terminals 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

The communication device 800 provided in the embodiment of the present application can implement the various processes implemented by the method embodiments of Figures 2 to 5 and achieve the same technical effects. To avoid repetition, they will not be described here.

As shown in Figure 9, it is a structural diagram of a communication device 900 provided for an exemplary embodiment of the present application, and the device 900 includes a transmission module 910, which is used to provide a first time-frequency resource and/or a second time-frequency resource to a terminal; wherein the first time-frequency resource is a time-frequency resource used for FD transmission of a network-side device and/or a time-frequency resource for half-duplex transmission of the terminal, and the second time-frequency resource is a time-frequency resource used for FD transmission of the terminal.

Optionally, the first time-frequency resources include cell-specific time-frequency resources and/or UE-specific time-frequency resources.

Optionally, the second time-frequency resources include cell-specific time-frequency resources and/or UE-specific time-frequency resources.

Optionally, the transmission module 910 is also used to: provide first indication information and/or second indication information to the terminal; wherein the first indication information is used to indicate whether to operate in the first mode or the second mode on the first time domain unit; wherein the first mode is to determine the time-frequency resources for FD transmission based on the first time-frequency resources, and the second mode is to determine the time-frequency resources for FD transmission based on the second time-frequency resources; the second indication information is used to indicate FD transmission on the fifth time domain unit.

The communication device in the embodiment of the present application may be a network side device, such as a component in the network side device, such as an integrated circuit or a chip. The network side device may include but is not limited to the types of network side devices 12 listed above, and the embodiment of the present application does not specifically limit them.

The communication device provided in the embodiment of the present application can implement each process implemented by the method embodiment of FIG7 and achieve the corresponding The same technical effects are achieved, and will not be described here to avoid repetition.

The embodiment of the present application also provides a terminal, including a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the method described in method embodiments 200-500. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to the terminal embodiment and can achieve the same technical effect. Specifically, Figure 10 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

The terminal 1000 includes but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, and at least some of the components of a processor 1010.

Those skilled in the art can understand that the terminal 1000 can also include a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected to the processor 1010 through a power management system, so as to implement functions such as charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG10 does not constitute a limitation on the terminal, and the terminal can include more or fewer components than shown in the figure, or combine certain components, or arrange components differently, which will not be described in detail here.

It should be understood that in the embodiment of the present application, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042, and the GPU 10041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (such as a volume control key, a switch key, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 1001 can transmit the data to the processor 1010 for processing; in addition, the RF unit 1001 can send uplink data to the network side device. Generally, the RF unit 1001 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

The memory 1009 can be used to store software programs or instructions and various data. The memory 1009 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1009 may include a volatile memory or a non-volatile memory, or the memory 1009 may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (SDRAM), etc. The memory 1009 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

The processor 1010 may include one or more processing units; optionally, the processor 1010 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1010.

The processor 1010 is configured to determine a target time-frequency resource according to the first time-frequency resource and/or the second time-frequency resource; the radio frequency unit 1001 is configured to perform full-duplex FD transmission based on the target time-frequency resource;

Among them, the first time-frequency resource is a time-frequency resource used for the network side device to perform FD transmission and/or a time-frequency resource used by the terminal to perform half-duplex transmission, and the second time-frequency resource is a time-frequency resource used for the terminal to perform FD transmission.

Optionally, the processor 1010 determines the target time-frequency resource based on the first time-frequency resource, including at least one of the following: when the first time-frequency resource is a time-frequency resource of a specific cell-specific, determining the first time-frequency resource as the target time-frequency resource; when the first time-frequency resource is a time-frequency resource of a specific terminal UE-specific, determining the first time-frequency resource as the target time-frequency resource; when the first time-frequency resource includes cell-specific time-frequency resources and frequency domain resources of a first protection band GB, determining the target time-frequency resource according to the cell-specific time-frequency resources and the frequency domain resources of the first GB, wherein the first GB is a cell-specific GB or the UE-specific GB; when the first time-frequency resource includes cell-specific time-frequency resources and UE-specific time-frequency resources, determining the UE-specific time-frequency resource as the target time-frequency resource; when the first time-frequency resource includes cell-specific time-frequency resources and UE-specific time-frequency resources, determining the intersection of the cell-specific time-frequency resources and the UE-specific time-frequency resources as the target time-frequency resource.

Optionally, the processor 1010 determines the target time-frequency resource based on the second time-frequency resource, including at least one of the following: when the second time-frequency resource is a cell-specific time-frequency resource, determining the cell-specific time-frequency resource as the target time-frequency resource; when the second time-frequency resource is a UE-specific time-frequency resource, determining the UE-specific time-frequency resource as the target time-frequency resource; when the second time-frequency resource includes a cell-specific time-frequency resource and a frequency domain resource of a second GB, determining the target time-frequency resource according to the cell-specific time-frequency resource and the frequency domain resource of the second GB, wherein the second GB is a cell-specific GB or a UE-specific GB; when the second time-frequency resource includes a cell-specific time-frequency resource and a UE-specific time-frequency resource, determining the UE-specific time-frequency resource as the target time-frequency resource; when the second time-frequency resource includes a cell-specific time-frequency resource and a UE-specific time-frequency resource, determining the intersection of the cell-specific time-frequency resource and the UE-specific time-frequency resource as the target time-frequency resource.

Optionally, the processor 1010 determines the target time-frequency resource according to the first time-frequency resource and the second time-frequency resource, including: obtaining first indication information; determining whether to operate in the first mode or the second mode on the first time domain unit according to the first indication information; wherein the first mode is to determine the target time-frequency resource according to the first time-frequency resource, and the The second mode is to determine the target time-frequency resource according to the second time-frequency resource.

Optionally, the first indication information is carried by at least one of the following: group common downlink control information DCI; UE specific DCI; media access control control unit MAC CE.

Optionally, for the UL subband and/or DL subband corresponding to the same time domain unit in the target time-frequency resources, at least one of the following is satisfied: the expected UL transmission is indicated or configured in the UL subband; the expected DL transmission is indicated or configured in the DL subband; the GB between the UL subband and the DL subband is expected to be no less than a first threshold; the minimum frequency interval between the uplink frequency domain resources corresponding to the UL transmission and the downlink frequency domain resources corresponding to the DL transmission is expected to be no less than a first threshold, wherein the uplink frequency domain resources are located in the UL subband and the downlink frequency domain resources are located in the DL subband; when only the UL subband is configured, the expected DL transmission is outside the UL subband; when only the DL subband is configured, the expected UL transmission is outside the DL subband.

Optionally, the radio frequency unit 1001 performs FD transmission based on the target time-frequency resources, including: when no uplink UL subband and downlink DL subband are configured in the target time-frequency resources, performing at least one of the following: performing FD transmission on the Flexible time domain unit in the target time-frequency resources; performing FD transmission in all time domain units in the target time-frequency resources; performing FD transmission on a subset of all time domain units in the target time-frequency resources.

Optionally, the transmission module performs FD transmission based on the target time-frequency resources, including: for the second time domain unit, when the target time-frequency resources are configured with a UL subband and a DL subband corresponding to the second time domain unit, performing at least one of the following: performing FD transmission when the minimum frequency domain interval between the UL subband and the DL subband is not less than a first threshold; performing FD transmission when the minimum frequency domain interval between the UL subband and the DL subband is less than the first threshold, but the interval between the uplink frequency domain resources corresponding to the UL transmission and the downlink frequency domain resources corresponding to the DL transmission is not less than the first threshold, wherein the uplink frequency domain resources corresponding to the UL transmission are located in the UL subband, and the downlink frequency domain resources corresponding to the DL transmission are located in the DL subband; when the minimum frequency domain interval between the UL subband and the DL subband is less than the first threshold, canceling or ignoring the FD transmission; when the minimum frequency domain interval between the UL subband and the DL subband is less than the first threshold, transmitting UL transmission or DL transmission.

Optionally, the radio frequency unit 1001 performs FD transmission based on the target time-frequency resources, including: for the third time domain unit, when only the UL subband corresponding to the third time domain unit is configured in the target time-frequency resources, performing at least one of the following: performing FD transmission when the interval between the UL subband and the downlink frequency domain resources used for DL transmission is not less than a second threshold; performing FD transmission when the interval between the UL subband and the downlink frequency domain resources used for DL transmission is not less than the second threshold and the DL transmission is located outside the UL subband.

Optionally, the radio frequency unit 1001 performs FD transmission based on the target time-frequency resources, including: for the fourth time domain unit, when only DL subbands corresponding to the four time domain units are configured in the target time-frequency resources, performing at least one of the following: performing FD transmission when the interval between the DL subband and the uplink frequency domain resources used for UL transmission is not less than a third threshold; performing FD transmission when the interval between the DL subband and the uplink frequency domain resources used for UL transmission is not less than a third threshold and the UL transmission is located outside the DL subband.

Optionally, the radio frequency unit 1001 performs FD transmission based on the target time-frequency resources, including: when UL transmission and DL transmission overlap on the target time domain resources, determining to transmit the UL transmission or/and DL transmission according to the transmission priority or the type of transmission signal; wherein the target time domain resources belong to the target time-frequency resources.

Optionally, the radio frequency unit 1001 is further used to: obtain second indication information when the first time-frequency resource and the second time-frequency resource are not configured; and perform FD transmission on the fifth time domain unit according to the second indication information.

Optionally, the radio frequency unit 1001 is also used to: when the UL transmission and/or the DL transmission is a designated transmission, perform at least one of the following: transmit the designated transmission based on the first time-frequency resources; fall back to normal mode to transmit the designated transmission; wherein the UL transmission and/or the DL transmission is an FD transmission based on the target time-frequency resources, or the UL transmission and/or the DL transmission is an FD transmission based on the second indication information.

Optionally, the designated transmission includes at least one of the following: synchronization signal block SSB; control resource set coreset 0; valid PRACH; transmission with specified priority.

It can be understood that the various implementation processes mentioned in this terminal embodiment can refer to the relevant descriptions in the aforementioned method embodiments 200-500, and achieve the same or corresponding technical effects. To avoid repetition, they will not be repeated here.

The embodiment of the present application also provides a network side device, including a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the method described in embodiment 700. The network side device embodiment corresponds to the above network side device method embodiment, and each implementation process and implementation method of the above method embodiment can be applied to the network side device embodiment and can achieve the same technical effect.

Specifically, the embodiment of the present application also provides a network side device. As shown in Figure 11, the network side device 1100 includes: an antenna 1101, a radio frequency device 1102, a baseband device 1103, a processor 1104 and a memory 1105. The antenna 1101 is connected to the radio frequency device 1102. In the uplink direction, the radio frequency device 1102 receives information through the antenna 1101 and sends the received information to the baseband device 1103 for processing. In the downlink direction, the baseband device 1103 processes the information to be sent and sends it to the radio frequency device 1102. The radio frequency device 1102 processes the received information and sends it out through the antenna 1101.

The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1103 , which includes a baseband processor.

The baseband device 1103 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 11, one of which is, for example, a baseband processor, which is connected to the memory 1105 through a bus interface to call the program in the memory 1105 and execute the network device operations shown in the above method embodiment.

The network side device may also include a network interface 1106, which is, for example, a common public radio interface (CPRI).

Specifically, the network side device 1100 of the embodiment of the present application also includes: instructions or programs stored in the memory 1105 and executable on the processor 1104. The processor 1104 calls the instructions or programs in the memory 1105 to execute the methods executed by the modules shown in Figure 9 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

The present application also provides a readable storage medium, wherein a program or instruction is stored on the readable storage medium. When the program or instruction is executed by the processor, the various processes of the above-mentioned communication method embodiments 200-700 are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run network-side device programs or instructions to implement the various processes of the above-mentioned communication method embodiments 200-700, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

An embodiment of the present application also provides a computer program product, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor. When the program or instruction is executed by the processor, each process of the above-mentioned communication method embodiments 200-700 is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

An embodiment of the present application also provides a wireless communication system, including: a terminal and a network side device, wherein the terminal can be used to execute the various processes of the communication method embodiments 200-500 as described above, and the network side device can be used to execute the various processes of the communication method embodiment 700 as described above, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementations, which are merely illustrative and not restrictive. A person skilled in the art will be able to Inspired by this application, many forms can be made without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims (39)

A communication method, comprising: The terminal determines the target time-frequency resource according to the first time-frequency resource and/or the second time-frequency resource; Perform full-duplex FD transmission based on the target time-frequency resources; Among them, the first time-frequency resource is a time-frequency resource used for the network side device to perform FD transmission and/or a time-frequency resource used by the terminal to perform half-duplex transmission, and the second time-frequency resource is a time-frequency resource used for the terminal to perform FD transmission. The method according to claim 1, wherein the terminal determines the target time-frequency resource according to the first time-frequency resource, comprising at least one of the following: In a case where the first time-frequency resource is a cell-specific time-frequency resource, determining the first time-frequency resource as the target time-frequency resource; In a case where the first time-frequency resource is a time-frequency resource specific to a specific terminal UE, determining the first time-frequency resource as the target time-frequency resource; In a case where the first time-frequency resources include cell-specific time-frequency resources and frequency domain resources of a first guard band GB, determining the target time-frequency resources according to the cell-specific time-frequency resources and the frequency domain resources of the first GB, wherein the first GB is the cell-specific GB or the UE-specific GB; In a case where the first time-frequency resources include cell-specific time-frequency resources and UE-specific time-frequency resources, determining the UE-specific time-frequency resources as the target time-frequency resources; In the case where the first time-frequency resources include cell-specific time-frequency resources and UE-specific time-frequency resources, the intersection between the cell-specific time-frequency resources and the UE-specific time-frequency resources is determined as the target time-frequency resources. The method of claim 1, wherein the terminal determines the target time-frequency resource according to the second time-frequency resource, comprising at least one of the following: In a case where the second time-frequency resource is a cell-specific time-frequency resource, determining the cell-specific time-frequency resource as the target time-frequency resource; In a case where the second time-frequency resource is a UE-specific time-frequency resource, determining the UE-specific time-frequency resource as the target time-frequency resource; In a case where the second time-frequency resources include a cell-specific time-frequency resource and a frequency domain resource of a second GB, determining the target time-frequency resource according to the cell-specific time-frequency resource and the frequency domain resource of the second GB, wherein the second GB is a cell-specific GB or a UE-specific GB; In a case where the second time-frequency resources include cell-specific time-frequency resources and UE-specific time-frequency resources, determining the UE-specific time-frequency resources as the target time-frequency resources; In the case where the second time-frequency resources include cell-specific time-frequency resources and UE-specific time-frequency resources, the intersection of the cell-specific time-frequency resources and the UE-specific time-frequency resources is determined as the target time-frequency resources. The method according to any one of claims 1 to 3, wherein the terminal determines the target time-frequency resource according to the first time-frequency resource and the second time-frequency resource, comprising: Obtaining first indication information; Determine whether to operate in the first mode or the second mode on the first time domain unit according to the first indication information; wherein the first mode is to determine the target time-frequency resources according to the first time-frequency resources, and the second mode is to determine the target time-frequency resources according to the second time-frequency resources. The method according to claim 4, wherein the first indication information is carried by at least one of the following: Group common downlink control information DCI; UE specific DCI; Media Access Control Control Unit MAC CE. The method according to any one of claims 1 to 5, wherein the performing FD transmission based on the target time-frequency resource comprises: When no uplink UL subband and no downlink DL subband are configured in the target time-frequency resource, at least one of the following is performed: Performing FD transmission on the Flexible time domain unit in the target time-frequency resource; Performing FD transmission in all time domain units of the target time-frequency resource; FD transmission is performed on a subset of all time domain units in the target time-frequency resource. The method according to any one of claims 1 to 5, wherein the FD transmission based on the target time-frequency resource comprises: For the second time domain unit, when a UL subband and a DL subband corresponding to the second time domain unit are configured in the target time-frequency resource, at least one of the following is performed: When a minimum frequency domain interval between the UL subband and the DL subband is not less than a first threshold, performing FD transmission; When the minimum frequency domain interval between the UL subband and the DL subband is less than a first threshold, but the interval between the uplink frequency domain resources corresponding to the UL transmission and the downlink frequency domain resources corresponding to the DL transmission is not less than the first threshold, FD transmission is performed, wherein the uplink frequency domain resources corresponding to the UL transmission are located in the UL subband, and the downlink frequency domain resources corresponding to the DL transmission are located in the DL subband; When the minimum frequency domain interval between the UL subband and the DL subband is less than a first threshold, canceling or ignoring the FD transmission; In a case where a minimum frequency domain interval between the UL subband and the DL subband is less than a first threshold, UL transmission or DL transmission is transmitted. The method according to any one of claims 1 to 5, wherein the FD transmission based on the target time-frequency resource comprises: For the third time domain unit, when only a UL subband corresponding to the third time domain unit is configured in the target time-frequency resource, at least one of the following is performed: When the interval between the UL subband and the downlink frequency domain resource used for DL transmission is not less than a second threshold, performing FD transmission; When the interval between the UL subband and the downlink frequency domain resource used for DL transmission is not less than a second threshold and the DL transmission is located outside the UL subband, FD transmission is performed. The method according to any one of claims 1 to 5, wherein the FD transmission based on the target time-frequency resource comprises: For the fourth time domain unit, when only DL subbands corresponding to the four time domain units are configured in the target time-frequency resources, at least one of the following is performed: When the interval between the DL subband and the uplink frequency domain resource used for UL transmission is not less than a third threshold, performing FD transmission; When the interval between the DL subband and the uplink frequency domain resource used for UL transmission is not less than a third threshold and the UL transmission is located outside the DL subband, FD transmission is performed. The method according to any one of claims 1 to 9, wherein the method comprises: For a UL subband and/or a DL subband corresponding to the same time domain unit in the target time-frequency resource, performing at least one of the following: The desired UL transmission is indicated or configured in the UL subband; Desired DL transmission is indicated or configured in the DL subband; It is expected that the GB between the UL subband and the DL subband is not less than a first threshold; It is expected that a minimum frequency interval between an uplink frequency domain resource corresponding to UL transmission and a downlink frequency domain resource corresponding to DL transmission is not less than a first threshold, wherein the uplink frequency domain resource is located in the UL subband and the downlink frequency domain resource is located in the DL subband; In case only the UL subband is configured, the desired DL transmission is outside the UL subband; In case only the DL subband is configured, UL transmission is expected to be outside the DL subband. The method according to any one of claims 1 to 10, wherein the FD transmission is performed based on the target time-frequency resource, comprising: In the case where UL transmission and DL transmission overlap on the target time domain resource, determining to transmit the UL transmission or/and the DL transmission according to the transmission priority or the type of the transmission signal; Among them, the target time domain resources belong to the target time-frequency resources. The method according to any one of claims 1 to 11, wherein the method further comprises: When the first time-frequency resource and the second time-frequency resource are not configured, obtaining second indication information; Perform FD transmission on the fifth time domain unit according to the second indication information. The method according to any one of claims 1 to 12, wherein the method further comprises: In the case where the UL transmission and/or the DL transmission is designated transmission, at least one of the following is performed: Transmitting the designated transmission based on the first time-frequency resource; Falling back to normal mode to transmit the specified transmission; The UL transmission and/or the DL transmission is/are FD transmissions based on target time-frequency resources, or the UL transmission and/or the DL transmission is/are FD transmissions based on the second indication information. The method of claim 13, wherein the designated transmission comprises at least one of the following: Synchronization signal block SSB; Control resource set coreset 0; Effective PRACH; A transfer with a specified priority. A communication method, the method comprising: The network side device provides the first time-frequency resource and/or the second time-frequency resource to the terminal; Among them, the first time-frequency resource is a time-frequency resource used for the network side device to perform FD transmission and/or a time-frequency resource used by the terminal to perform half-duplex transmission, and the second time-frequency resource is a time-frequency resource used for the terminal to perform FD transmission. The method as claimed in claim 15, wherein the first time-frequency resources include time-frequency resources specific to a specific cell and/or time-frequency resources specific to a specific terminal UE. The method as claimed in claim 15, wherein the second time-frequency resources include time-frequency resources specific to a specific cell and/or time-frequency resources specific to a specific terminal UE. The method according to any one of claims 15 to 17, wherein the method further comprises: Providing first indication information and/or second indication information to the terminal; The first indication information is used to indicate whether to work in the first mode or the second mode on the first time domain unit; wherein the first mode is to determine the time-frequency resources for FD transmission according to the first time-frequency resources, and the second mode is to determine the time-frequency resources for FD transmission according to the second time-frequency resources; The second indication information is used to indicate that FD transmission is performed on the fifth time domain unit. A communication device, comprising: A determination module, configured to determine a target time-frequency resource according to the first time-frequency resource and/or the second time-frequency resource; A transmission module, configured to perform full-duplex FD transmission based on the target time-frequency resources; Among them, the first time-frequency resource is a time-frequency resource used for the network side device to perform FD transmission and/or a time-frequency resource used by the terminal to perform half-duplex transmission, and the second time-frequency resource is a time-frequency resource used for the terminal to perform FD transmission. The apparatus of claim 19, wherein the determining module determines the target time-frequency resource according to the first time-frequency resource, comprising at least one of the following: In a case where the first time-frequency resource is a cell-specific time-frequency resource, determining the first time-frequency resource as the target time-frequency resource; In a case where the first time-frequency resource is a time-frequency resource specific to a specific terminal UE, determining the first time-frequency resource as the target time-frequency resource; In a case where the first time-frequency resources include cell-specific time-frequency resources and frequency domain resources of a first guard band GB, determining the target time-frequency resources according to the cell-specific time-frequency resources and the frequency domain resources of the first GB, wherein the first GB is the cell-specific GB or the UE specific GB; In a case where the first time-frequency resources include cell-specific time-frequency resources and UE-specific time-frequency resources, determining the UE-specific time-frequency resources as the target time-frequency resources; In the case where the first time-frequency resources include cell-specific time-frequency resources and UE-specific time-frequency resources, the intersection between the cell-specific time-frequency resources and the UE-specific time-frequency resources is determined as the target time-frequency resources. The apparatus of claim 19, wherein the determining module determines the target time-frequency resource according to the second time-frequency resource, comprising at least one of the following: In a case where the second time-frequency resource is a cell-specific time-frequency resource, determining the cell-specific time-frequency resource as the target time-frequency resource; In a case where the second time-frequency resource is a UE-specific time-frequency resource, determining the UE-specific time-frequency resource as the target time-frequency resource; In a case where the second time-frequency resources include a cell-specific time-frequency resource and a frequency domain resource of a second GB, determining the target time-frequency resource according to the cell-specific time-frequency resource and the frequency domain resource of the second GB, wherein the second GB is a cell-specific GB or a UE-specific GB; In a case where the second time-frequency resources include cell-specific time-frequency resources and UE-specific time-frequency resources, determining the UE-specific time-frequency resources as the target time-frequency resources; In the case where the second time-frequency resources include cell-specific time-frequency resources and UE-specific time-frequency resources, the intersection of the cell-specific time-frequency resources and the UE-specific time-frequency resources is determined as the target time-frequency resources. The apparatus according to any one of claims 19 to 21, wherein the determining module determines the target time-frequency resource according to the first time-frequency resource and the second time-frequency resource, comprising: Obtaining first indication information; Determine whether to operate in the first mode or the second mode on the first time domain unit according to the first indication information; wherein the first mode is to determine the target time-frequency resources according to the first time-frequency resources, and the second mode is to determine the target time-frequency resources according to the second time-frequency resources. The apparatus according to claim 22, wherein the first indication information is carried by at least one of the following: Group common downlink control information DCI; UE specific DCI; Media Access Control Control Unit MAC CE. The apparatus according to any one of claims 19 to 23, wherein the transmission module performs FD transmission based on the target time-frequency resource, comprising: When no uplink UL subband and no downlink DL subband are configured in the target time-frequency resource, at least one of the following is performed: Performing FD transmission on the Flexible time domain unit in the target time-frequency resource; Performing FD transmission in all time domain units of the target time-frequency resource; The FD transmission is performed on a subset of all time domain units in the target time-frequency resource. The apparatus according to any one of claims 19 to 23, wherein the transmission module performs FD transmission based on the target time-frequency resource, comprising: For the second time domain unit, when a UL subband and a DL subband corresponding to the second time domain unit are configured in the target time-frequency resource, at least one of the following is performed: When a minimum frequency domain interval between the UL subband and the DL subband is not less than a first threshold, performing FD transmission; When the minimum frequency domain interval between the UL subband and the DL subband is less than the first threshold, but the interval between the uplink frequency domain resources corresponding to the UL transmission and the downlink frequency domain resources corresponding to the DL transmission is not less than the first threshold, FD transmission is performed, wherein the uplink frequency domain resources corresponding to the UL transmission are located in the UL subband, and the downlink frequency domain resources corresponding to the DL transmission are located in the DL subband; When the minimum frequency domain interval between the UL subband and the DL subband is less than a first threshold, canceling or ignoring the FD transmission; In a case where a minimum frequency domain interval between the UL subband and the DL subband is less than a first threshold, UL transmission or DL transmission is transmitted. The apparatus according to any one of claims 19 to 23, wherein the transmission module performs FD transmission based on the target time-frequency resource, comprising: For the third time domain unit, when only a UL subband corresponding to the third time domain unit is configured in the target time-frequency resource, at least one of the following is performed: When the interval between the UL subband and the downlink frequency domain resource used for DL transmission is not less than a second threshold, performing FD transmission; When the interval between the UL subband and the downlink frequency domain resource used for DL transmission is not less than a second threshold and the DL transmission is located outside the UL subband, FD transmission is performed. The apparatus according to any one of claims 19 to 23, wherein the transmission module performs FD transmission based on the target time-frequency resource, comprising: For the fourth time domain unit, when only DL subbands corresponding to the four time domain units are configured in the target time-frequency resources, at least one of the following is performed: When the interval between the DL subband and the uplink frequency domain resource used for UL transmission is not less than a third threshold, performing FD transmission; When the interval between the DL subband and the uplink frequency domain resource used for UL transmission is not less than a third threshold and the UL transmission is located outside the DL subband, FD transmission is performed. The apparatus according to any one of claims 19 to 27, wherein, for a UL subband and/or a DL subband corresponding to the same time domain unit in the target time-frequency resource, the determination module is further configured to perform at least one of the following: The desired UL transmission is indicated or configured in the UL subband; Desired DL transmission is indicated or configured in the DL subband; It is expected that the GB between the UL subband and the DL subband is not less than a first threshold; It is expected that a minimum frequency interval between an uplink frequency domain resource corresponding to UL transmission and a downlink frequency domain resource corresponding to DL transmission is not less than a first threshold, wherein the uplink frequency domain resource is located in the UL subband and the downlink frequency domain resource is located in the DL subband; In case only the UL subband is configured, the desired DL transmission is outside the UL subband; In case only the DL subband is configured, UL transmission is expected to be outside the DL subband. The apparatus according to any one of claims 19 to 28, wherein the transmission module performs FD transmission based on the target time-frequency resource, comprising: In the case where UL transmission and DL transmission overlap on the target time domain resource, determining to transmit the UL transmission or/and the DL transmission according to the transmission priority or the type of the transmission signal; Among them, the target time domain resources belong to the target time-frequency resources. The device as described in any one of claims 19-29, wherein the transmission module is further used to: obtain second indication information when the first time-frequency resource and the second time-frequency resource are not configured; and perform FD transmission on the fifth time domain unit according to the second indication information. The apparatus according to any one of claims 19 to 30, wherein the transmission module is further configured to: when the UL transmission and/or the DL transmission is a designated transmission, perform at least one of the following: Transmitting the designated transmission based on the first time-frequency resource; Falling back to normal mode to transmit the specified transmission; The UL transmission and/or the DL transmission is/are FD transmissions based on target time-frequency resources, or the UL transmission and/or the DL transmission is/are FD transmissions based on the second indication information. The apparatus of claim 31, wherein the designated transmission comprises at least one of: Synchronization signal block SSB; Control resource set coreset 0; Effective PRACH; A transfer with a specified priority. A communication device, comprising: A transmission module, used to provide the first time-frequency resource and/or the second time-frequency resource to the terminal; Among them, the first time-frequency resource is a time-frequency resource used for FD transmission by the network side device and/or a time-frequency resource used for half-duplex transmission by the terminal, and the second time-frequency resource is a time-frequency resource used for FD transmission by the terminal. The device as claimed in claim 33, wherein the first time-frequency resources include time-frequency resources specific to a specific cell and/or time-frequency resources specific to a specific terminal UE. The device as described in claim 33, wherein the second time-frequency resources include time-frequency resources specific to a specific cell and/or time-frequency resources specific to a specific terminal UE. The device according to any one of claims 33 to 35, wherein the transmission module is further used to: provide the first indication information and/or the second indication information to the terminal; The first indication information is used to indicate whether the first time domain unit operates in the first mode or the second mode; The first mode is to determine the time-frequency resources for FD transmission according to the first time-frequency resources, and the second mode is to determine the time-frequency resources for FD transmission according to the second time-frequency resources; The second indication information is used to indicate that FD transmission is performed on the fifth time domain unit. A terminal comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the communication method according to any one of claims 1 to 14 are implemented. A network side device includes a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the communication method as described in any one of claims 15 to 18 are implemented. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the communication method according to any one of claims 1 to 14, or implements the steps of the method according to any one of claims 15 to 18.