A communication method, a terminal, a network device and a communication system

Abstract

The embodiment of the application provides a communication method, a terminal, a network device and a communication system. The network device sends first indication information to the terminal, and the first indication information is used for indicating transmission directions corresponding to at least two carriers in a first time domain range, wherein the first time domain range includes one or a plurality of continuous time units, and at least one carrier in the at least two carriers is different from the transmission direction of other carriers in the at least two carriers. The network device can flexibly adjust the transmission direction of the at least two carriers, so that the network device simultaneously performs uplink transmission and downlink transmission through the at least two carriers in the time unit of the first time domain range, and the spectrum efficiency and scheduling flexibility are improved.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method, terminal, network device and communication system. Background Technology

[0002] With the development of mobile communication technology, the efficient utilization and flexible allocation of spectrum resources have become important means to improve the performance of communication systems. The basic communication spectrum of 5G (such as the Sub-3GHz spectrum) has the advantages of low penetration loss and wide coverage, playing a crucial role in network deployment. However, operators face challenges in accessing low-frequency spectrum resources, which are discontinuous and have limited bandwidth within each band, resulting in low spectrum efficiency and insufficient scheduling flexibility. Summary of the Invention

[0003] This application provides a communication method that allows network devices and terminals to perform full-duplex communication in frequency domain resources.

[0004] In a first aspect, a communication method is provided, the method comprising: receiving first indication information, the first indication information being used to indicate the transmission direction corresponding to at least two carriers within a first time domain, wherein at least one of the at least two carriers has a different transmission direction from the other carriers within the at least two carriers, and the first time domain includes one time unit or a plurality of consecutive time units.

[0005] The first indication information includes instructions for network devices (such as base stations (gNBs) to perform uplink transmission and downlink reception within the same time unit's frequency domain resources. The frequency domain resources include carriers for multiple transmission directions, such as one or more carriers in the uplink transmission direction and one or more carriers in the downlink transmission direction. The frequency domain resources corresponding to these multiple carriers can be non-contiguous or contiguous.

[0006] In conjunction with the first aspect, the first indication information is used to indicate the transmission direction corresponding to at least two carrier groups within the first time domain, wherein at least one of the at least two carrier groups has a different transmission direction from the other carrier groups in the at least two carrier groups, and the carrier group includes at least one carrier.

[0007] A carrier or carrier group is part of the frequency domain resources, which are the electromagnetic spectrum used for communication between the terminal and network equipment. Frequency domain resources can also be represented by other physical parameters such as bandwidth, frequency band, and sub-band. This application does not limit the specific form of frequency domain resources.

[0008] In conjunction with the first aspect, in some embodiments of the first aspect, the first time domain range includes at least one uplink time unit and at least one flexible time unit, or at least one downlink time unit and at least one of the flexible time units.

[0009] The first time domain range is used to indicate the data transmission time when the terminal communicates with the network device, and can be represented by one or more time units. For example, in the frequency domain corresponding to the first time domain range, when the terminal and the network device transmit data uplink, the uplink transmission time can be represented by one or more uplink time units.

[0010] The first indication information can configure downlink time units and / or flexible time units as carrier non-overlapping full duplex (CFD) time units, and uplink time units and / or flexible time units as CFD time units. A CFD time unit indicates a period of time for data transmission on a carrier, and one or more CFD time units can constitute a first time domain range. Within the frequency domain resources corresponding to the CFD time unit, multiple carriers can be indicated with different transmission directions. The terminal and network device can perform uplink and / or downlink transmissions on the corresponding carriers within the time period of the CFD time unit. In this way, the terminal and network device can achieve full-duplex communication with simultaneous uplink and downlink transmissions within a time period that would otherwise only allow unidirectional transmission.

[0011] In conjunction with the first aspect, in some embodiments of the first aspect, the first indication information includes first information for indicating the location of a time unit within the first time domain range, and the first information is carried in cell-level signaling.

[0012] The first information may include a start time unit field and a time unit length field (such as the start time slot, start symbol, number of consecutive symbols, etc.). The start time unit field can serve as an indication of the starting position of the first time domain range, and the time unit length field can serve as an indication of the duration of the first time domain range, indicating the number of time units.

[0013] The first information can also indicate the start position of the first time domain range (such as the start time slot, start symbol, etc.) and the end position of the first time domain range (such as the end time slot, end symbol, etc.). The embodiments of this application do not limit the specific way in which the first information indicates the first time domain range.

[0014] This allows terminals and network devices to perform uplink and / or downlink transmissions on corresponding carriers within a defined CFD time unit.

[0015] In conjunction with the first aspect, in some embodiments of the first aspect, the first indication information includes second information and third information. The second information is used to indicate the location of a portion of time units within the first time domain range, and the third information is used to indicate the location of another portion of time units within the first time domain range. The second information is carried in cell-level signaling, and the third information is carried in user-specific signaling and / or dynamic time slot format information. The other portion of time units is the flexible time unit not configured in the cell-level signaling.

[0016] The third type of information, such as user-specific signaling or slot format information (SFI) indicated by Dynamic Downlink Control Information (DCI) format 2_0, can indicate that a portion of time units (such as uplink time units, downlink time units, and a portion of flexible time units) are CFD time units after the second type of information (such as cell-level signaling) indicates that a portion of time units (such as uplink time units, downlink time units, and a portion of flexible time units) are CFD time units, and indicate that another portion of time units (such as another portion of flexible time units) are CFD time units.

[0017] This allows for more flexible configuration of time-domain resources. For example, network devices can configure flexible time units as CFD time units through user-specific signaling or dynamic SFI, allowing terminals to perform uplink transmissions on the uplink carrier corresponding to that CFD time unit, thereby providing terminals with more uplink transmission resources.

[0018] In conjunction with the first aspect, in some embodiments of the first aspect, a second indication information is received, the second indication information being used to indicate the transmission direction of switching some or all of the at least two carriers.

[0019] In conjunction with the first aspect, in some embodiments of the first aspect, the transmission direction includes an uplink transmission direction, a downlink transmission direction, and an uplink plus downlink transmission direction.

[0020] The carrier supporting both uplink and downlink transmission can be called a simultaneous, same-frequency, full-duplex carrier. If the carrier's transmission direction is both uplink and downlink, the network device can simultaneously perform uplink and downlink transmissions with one or more terminals on a single simultaneous, same-frequency, full-duplex carrier. If the carrier's transmission direction is either uplink or downlink, the network device can communicate in full-duplex with multiple terminals on carriers with different transmission directions.

[0021] In this way, network devices can communicate in full-duplex on the same carrier, improving the utilization of frequency domain resources.

[0022] It should be noted that, in the absence of conflict, the features in the various embodiments of the first aspect can be combined with each other, and any combination of features in different embodiments is also within the protection scope of this application. That is to say, the various embodiments described above can also be arbitrarily combined according to actual needs.

[0023] In a second aspect, a communication method is provided, the method comprising: sending first indication information, the first indication information being used to indicate the transmission direction corresponding to at least two carriers within a first time domain, wherein at least one of the at least two carriers has a different transmission direction from the other carriers within the at least two carriers, and the first time domain includes one time unit or a plurality of consecutive time units.

[0024] In conjunction with the second aspect, the first indication information is used to indicate the transmission direction corresponding to at least two carrier groups within the first time domain, wherein at least one of the at least two carrier groups has a different transmission direction from the other carrier groups in the at least two carrier groups, and the carrier group includes at least one carrier.

[0025] In conjunction with the second aspect, in some embodiments of the second aspect, the first time domain range includes at least one uplink time unit and at least one flexible time unit, or at least one downlink time unit and at least one of the flexible time units.

[0026] In conjunction with the second aspect, in some embodiments of the second aspect, the indication information includes first information for indicating the location of a time unit within the first time domain range, the first information being carried in cell-level signaling.

[0027] In conjunction with the second aspect, in some embodiments of the second aspect, the first indication information includes second information and third information. The second information is used to indicate the location of a portion of time units within the first time domain range, and the third information is used to indicate the location of another portion of time units within the first time domain range. The second information is carried in cell-level signaling, and the third information is carried in user-specific signaling and / or dynamic time slot format information. The other portion of time units is a flexible time unit configured by cell-level signaling.

[0028] In conjunction with the second aspect, in some embodiments of the second aspect, a second indication message is sent, which is used to indicate the switching of the transmission direction of some or all of the at least two carriers.

[0029] In conjunction with the second aspect, in some embodiments of the second aspect, the transmission direction includes an uplink transmission direction, a downlink transmission direction, and an uplink plus downlink transmission direction.

[0030] It should be noted that, in the absence of conflict, the features in the various embodiments of the second aspect can be combined with each other, and any combination of features in different embodiments is also within the scope of protection of this application. That is to say, the various embodiments described above can also be arbitrarily combined according to actual needs.

[0031] Thirdly, a terminal is provided, the terminal including one or more memories, one or more processors, and one or more wireless modules; the wireless modules are configured to receive signals transmitted by one or more network devices, or to transmit signals to one or more network devices, the memories being coupled to the one or more processors, the memories being configured to store computer program code including computer instructions, the one or more processors invoking the computer instructions to cause the terminal to perform methods as described in the first aspect and some embodiments of the first aspect.

[0032] Fourthly, a network device is provided, the network device including one or more memories, one or more processors, and one or more wireless modules; the wireless modules are configured to receive signals transmitted by one or more terminals, or to transmit signals to one or more of the terminals, the memories being coupled to the one or more processors, the memories being configured to store computer program code including computer instructions, the one or more processors invoking the computer instructions to cause the network device to perform methods as described in the second aspect and some embodiments of the second aspect.

[0033] Fifthly, a communication system is provided, comprising a terminal and a network device, wherein the terminal performs the method as described in the first aspect and some embodiments thereof, and the network device performs the method as described in the second aspect and some embodiments thereof.

[0034] In a sixth aspect, a computer-readable storage medium is provided, including instructions that, when executed on a terminal, cause the terminal to perform methods as described in the first aspect and some embodiments thereof.

[0035] A seventh aspect provides a computer device including a memory, a processor, and a computer program stored in the memory, the processor executing the computer program to implement methods as described in the first aspect and some embodiments thereof.

[0036] Eighthly, a computer program product is provided, including instructions that, when executed on a computer, cause the computer to perform methods as described in the first aspect and some embodiments thereof.

[0037] Ninth aspect, a chip is provided that stores a computer program, which, when executed by the chip, implements the methods as described in the first aspect and some embodiments thereof.

[0038] In a tenth aspect, a communication device is provided, including a communication unit, and optionally, a processing unit. The communication unit is used to communicate with other devices, i.e., to send information to other devices and / or to receive information from other devices. The processing unit is used to perform actions other than sending and receiving. The communication device is used to perform the methods provided in the first or second aspect above through the communication unit and the processing unit. Attached Figure Description

[0039] Figure 1 This application provides a schematic diagram of the architecture of a wireless communication system.

[0040] Figure 2 This is a schematic diagram of a wireless frame structure in an NR communication system provided in an embodiment of this application;

[0041] Figure 3A A schematic diagram of a cell-level time slot format configuration pattern provided in an embodiment of this application;

[0042] Figure 3B A schematic diagram of another cell-level time slot format configuration pattern provided in an embodiment of this application;

[0043] Figure 3C A schematic diagram of a user-level time slot format configuration pattern provided in an embodiment of this application;

[0044] Figure 4A A schematic diagram of a time slot format provided in an embodiment of this application;

[0045] Figure 4B A schematic diagram illustrating another time slot format provided in an embodiment of this application;

[0046] Figure 5 A schematic diagram illustrating a time slot format configuration provided in an embodiment of this application;

[0047] Figure 6A A schematic diagram of a carrier wave provided for an embodiment of this application;

[0048] Figure 6B A schematic diagram of another carrier provided for an embodiment of this application;

[0049] Figure 6C A schematic diagram of another carrier provided for an embodiment of this application;

[0050] Figure 6D A schematic diagram of another carrier provided for an embodiment of this application;

[0051] Figure 7 A schematic diagram of a TDD time slot structure provided in an embodiment of this application;

[0052] Figure 8A A schematic diagram of a carrier full-duplex time slot provided for an embodiment of this application;

[0053] Figure 8B A schematic diagram of another carrier full-duplex time slot provided in an embodiment of this application;

[0054] Figure 8C A schematic diagram of another carrier full-duplex time slot provided in an embodiment of this application;

[0055] Figure 9A A schematic diagram of another carrier full-duplex time slot provided in an embodiment of this application;

[0056] Figure 9B A schematic diagram of another carrier full-duplex time slot provided in an embodiment of this application;

[0057] Figure 9C A schematic diagram of another carrier full-duplex time slot provided in an embodiment of this application;

[0058] Figure 10 A flowchart illustrating the communication method provided in the embodiments of this application;

[0059] Figure 11A A schematic diagram illustrating an indication of a first time domain range, provided as an embodiment of this application;

[0060] Figure 11B A schematic diagram illustrating another indication of the first time domain range provided in an embodiment of this application;

[0061] Figure 11C A schematic diagram illustrating another indication of the first time domain range provided in an embodiment of this application;

[0062] Figure 11D A schematic diagram illustrating another indication of the first time domain range provided in an embodiment of this application;

[0063] Figure 12A A schematic diagram illustrating a carrier transmission direction provided in an embodiment of this application;

[0064] Figure 12B A schematic diagram illustrating another carrier transmission direction provided in an embodiment of this application;

[0065] Figure 12C A schematic diagram illustrating another carrier transmission direction provided in an embodiment of this application;

[0066] Figure 13A A schematic diagram illustrating the time-domain and frequency-domain resource configuration of a carrier provided in an embodiment of this application;

[0067] Figure 13BA schematic diagram illustrating another carrier time-domain and frequency-domain resource configuration provided in an embodiment of this application;

[0068] Figure 14A A schematic diagram illustrating a switching carrier transmission direction provided in an embodiment of this application;

[0069] Figure 14B A schematic diagram illustrating another method for switching carrier transmission direction provided in an embodiment of this application;

[0070] Figure 14C A schematic diagram illustrating another method for switching carrier transmission direction provided in an embodiment of this application;

[0071] Figure 14D A schematic diagram illustrating another method for switching carrier transmission direction provided in an embodiment of this application;

[0072] Figure 15 This is a schematic diagram illustrating the configuration of carrier position and transmission direction according to an embodiment of this application;

[0073] Figure 16 A schematic diagram of the hardware architecture of a terminal provided in an embodiment of this application;

[0074] Figure 17 This application provides a schematic diagram of the hardware architecture of a network device.

[0075] Figure 18 A schematic diagram of a communication device provided in an embodiment of this application; Detailed Implementation

[0076] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present application.

[0077] In this application, "and / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document indicates that the related objects before and after it are in an "or" relationship.

[0078] "At least one of" or similar expressions refer to any combination of the listed items, including any combination of single or multiple items. For example, at least one of a, b, or c, or at least one of a, b, and c, can mean: a, b, c, a and b, a and c, b and c, or a, b, and c, where each of a, b, and c can be an element on its own or a set containing one or more elements.

[0079] In this application, "at least one" means one or more. "More than one" means two or more. The descriptions of "first," "second," etc., appearing in the embodiments of this application are for illustrative purposes and to distinguish the described objects only. They have no order and do not indicate a specific limitation on the number in the embodiments of this application, nor do they constitute any limitation on the embodiments of this application. For example, "first information" and "second information" are only used to distinguish different information, and do not indicate that the two pieces of information are the same or different.

[0080] In this application, terms such as "exemplary," "in some embodiments," and "in other embodiments" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the term "exemplary" is used to present the concept in a specific manner.

[0081] In this application, the terms "of," "corresponding (relevant)," "corresponding," and "related" may sometimes be used interchangeably. It should be noted that, unless a distinction is emphasized, their intended meanings are consistent. Similarly, in the embodiments of this application, "communication" and "transmission" may sometimes be used interchangeably. It should be noted that, unless a distinction is emphasized, their intended meanings are consistent. For example, transmission can include sending and / or receiving, and can be a noun or a verb.

[0082] In this application, "equal to" can be used with "less than" or "greater than", but not simultaneously with both. When "equal to" is used with "less than", it applies to the technical solution adopted by "less than". When "equal to" is used with "greater than", it applies to the technical solution adopted by "greater than".

[0083] Figure 1 The diagram illustrates a wireless communication system 100 related to this application. This wireless communication system 100 is an exemplary architecture diagram of a communication system applicable to embodiments of this application. The wireless communication system 100 includes a terminal 300 and a network device 400, which can communicate with each other.

[0084] Terminal 300 can be distributed throughout the wireless communication system 100, and can be stationary or mobile. In some embodiments of this application, terminal 300 can be user equipment (UE), mobile device, mobile station, mobile unit, machine-to-machine (M2M) terminal, wireless unit, terminal equipment, remote unit, terminal agent, mobile client, etc.

[0085] Network device 400 can be a base station. A base station can communicate with one or more terminals, or with one or more base stations that have partial terminal functions (such as macro base stations and micro base stations, like access points). A base station can be a base transceiver station (BTS) in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, an evolved Node B (eNB) in a Long Term Evolution (LTE) system, or a base station in a 5th Generation Mobile Communication Technology (5G) system or a 5G New Radio (5G NR) system. Additionally, a base station can also be a transmission and reception point (TRP), an access point (AP), a central unit (CU), or other network entities, and can include some or all of the functions of these network entities.

[0086] It should be understood that Figure 1 The wireless communication system 100 described herein uses one network device 400 and one terminal 300 as an example. In practical applications, the number of network devices 400 and terminals 300 in the wireless communication system 100 can be greater. In this case, network devices and / or terminals can also communicate with each other. One network device 400 can communicate with multiple terminals 300 simultaneously. Multiple network devices 400 can also communicate with a single terminal 300 simultaneously. It should be noted that... Figure 1This is merely illustrative; the embodiments of this application do not limit the types of devices included in the wireless communication system 100. For example, the wireless communication system 100 may also include other network devices, such as wireless relay devices, wireless backhaul devices, etc. In the following description, the communication method provided in the embodiments of this application is applied to... Figure 1 The wireless communication system 100 is shown. Furthermore, this method can be executed by two communication devices, such as a first communication device and a second communication device. The first communication device can be a terminal 300 or a communication device capable of supporting the functions required for the terminal 300 to implement the method; it can also be other communication devices, such as a chip system. The second communication device can be a network device 400 or a communication device capable of supporting the functions required for the network device 400 to implement the method; it can also be other communication devices, such as a chip system. Conversely, the first communication device can be a network device 400 or a communication device capable of supporting the functions required for the network device 400 to implement the method, and the second communication device can be a terminal 300 or a communication device capable of supporting the functions required for the terminal 300 to implement the method; this application does not impose any limitations.

[0087] If the embodiments of this application are applied to... Figure 1 The wireless communication system 100 shown below can be used as a terminal described below. Figure 1 The terminal 300 in the wireless communication system 100 shown below, and the network device described below, can be... Figure 1 The wireless communication system 100 shown includes a network device 400. It should be noted that this embodiment is only illustrated using a terminal 300 and a network device 400 as examples; the execution devices in this embodiment are not limited to the terminal 300 and the network device 400.

[0088] To better understand this application, the following is a brief introduction to some of the concepts or technologies involved in this application.

[0089] 1. Time Unit

[0090] The time unit in this embodiment can be a time division duplex (TDD) time unit. A TDD time unit can be understood as a time unit within a TDD system. For a TDD system, time units include uplink (UL) time units, downlink (DL) time units, and flexible (F) time units. A time unit can represent a basic unit of time-domain resources. For example, a time unit can include a slot, a symbol, or a mini slot, etc.

[0091] It should be noted that the type of time unit can be used to determine the type of transmission on that time unit. For example, uplink time units are used for uplink transmission, such as uplink time slots or uplink symbols. Downlink time units are used for downlink transmission, such as downlink time slots or downlink symbols. Flexible time units are used for either uplink or downlink transmission, such as flexible time slots or flexible symbols.

[0092] 2. Time slot structure

[0093] In the New Radio (NR) system, a variety of flexible time slot structures are defined, including all downlink time slots, all uplink time slots, all flexible time slots, as well as time slot structures with different numbers of downlink symbols, uplink symbols, and flexible symbols. Each time slot structure corresponds to a time slot format index.

[0094] For example, Figure 2 This paper illustrates a radio frame structure in an NR communication system. Each radio frame occupies a time domain of 10 milliseconds (ms), and each subframe is 1 ms long. The number of time slots contained in each subframe is determined by the sub-carrier space (SCS). A time slot can contain several symbols. Figure 2 Taking an SCS of 15 kHz as an example, one subframe contains one time slot, and one time slot contains 14 symbols. This application will also use this scenario as an example to exemplify the method provided in the embodiments of this application.

[0095] NR supports two types of slot structure configuration methods: semi-static and dynamic. In the semi-static method, the base station can configure the slot structure using either cell-specific common signaling or user-dedicated higher-layer signaling. The cell-specific semi-static slot structure is periodic. In the dynamic method, the dynamic slot structure is indicated by slot format information (SFI) carried in Downlink Control Information (DCI) format 2_0. Cell-specific common signaling, also known as cell-level signaling, can be semi-static cell-level radio resource control (RRC) signaling (e.g., TDD uplink / downlink common configuration (tdd-UL-DL-ConfigurationCommon) signaling) or other higher-layer signaling. User-dedicated higher-layer signaling, also known as user-specific signaling, can include TDD uplink / downlink dedicated configuration (tdd-UL-DL-ConfigurationDedicated) signaling. SFI can be carried in the Physical Downlink Control Channel (PDCCH) and dynamically sent to the terminal. Therefore, SFI can also be called dynamic SFI.

[0096] Cell-level signaling (such as tdd-UL-DL-ConfigurationCommon) can configure reference SCS and uplink / downlink patterns. The configuration parameters for the uplink / downlink pattern include P, d_slots, d_sym, u_slots, and u_sym. P is the slot configuration period, which can have multiple values, such as 0.5ms, 0.625ms, 1ms, etc., with a maximum value of 10ms. d_slots is the number of full downlink slots containing only downlink symbols within the period; d_sym is the number of consecutive downlink symbols in the slot following the last full downlink slot; u_slots is the number of full uplink slots containing only uplink symbols; and u_sym is the number of consecutive uplink symbols in the slot preceding the first full uplink slot. The remaining symbols and slots within the period are flexible symbols and flexible slots, respectively. When configuring an uplink / downlink pattern, it is a single-period slot configuration. For an example, see [link to example]. Figure 3A Taking a single-cycle time slot configuration as an example, P is 10ms, the reference SCS is 15kHz, d_slots is 3, d_sym is 2, u_slots is 3, and u_sym is 2.

[0097] In some implementations, when two uplink and downlink patterns are configured, a dual-cycle time slot configuration is used. For example, pattern 1 and pattern 2 can be configured simultaneously, each with its own independent cycle configuration. The dual-cycle configuration consists of two cascaded cycles. The time slot structure configuration method within the two cycles is the same as the single-cycle configuration. Specifically, the time slot configuration cycle of pattern 1 is P1 ms, and the time slot configuration cycle of pattern 2 is P2 ms. Therefore, pattern 1 and pattern 2 together contain a total time slot configuration cycle of P1 + P2 ms. See, for an example... Figure 3B Taking the dual-cycle time slot configuration as an example, the time slot configuration period P of pattern 1 is 4ms, the time slot configuration period P2 of pattern 2 is 6ms, the reference SCS is 15kHz, in pattern 1, d_slots is 1, d_sym is 2, u_slots is 1, u_sym is 2, in pattern 2, d_slots is 2, d_sym is 2, u_slots is 2, u_sym is 2.

[0098] The time slot structure configured for user-specific signaling can be called the UE-level time slot structure. User-specific signaling can configure the direction of flexible symbols in the cell-level time slot structure; specifically, it can be configured for each flexible time slot. For example, for any given flexible time slot, all flexible symbols in that time slot can be configured as uplink symbols, or all as downlink symbols, or some flexible symbols in that time slot can be configured as uplink and / or downlink symbols. Here, a flexible time slot refers to a time slot containing flexible symbols. For example, based on... Figure 3A Based on the configured cell-level time slot structure, user-specific signaling can configure some flexible symbols in the 6th time slot as uplink symbols. See details in [link to relevant documentation]. Figure 3C .

[0099] The SFI (Slot Information Function) can indicate the slot structure of flexible slots in the cell-level slot structure. The SFI information carried on the PDCCH can indicate the format of one or more slots on one or more carriers. Specifically, after the terminal detects the SFI, the SFI can indicate an index, which is an index in the "Terminal-Specific Slot Format Table". Each index in the "Terminal-Specific Slot Format Table" corresponds to a slot structure, and the symbol in the slot is determined as an uplink symbol, downlink symbol, or flexible symbol based on the slot structure. The aforementioned "Terminal-Specific Slot Format Table" is composed of "single slot formats", which contain all slot formats supported by the NR system (less than 256). For example, the Terminal-Specific Slot Format Table includes indices 1, 2, 3, 4, and 5, indicating slot structure 1, slot structure 2, slot structure 3, slot structure 4, and slot structure 5, respectively. In this table, time slot structures 1 to 3 represent the first three time slot structures in the terminal-specific time slot format table. In time slot structure 1, all symbols are downlink symbols, and a time slot with time slot structure 1 is a downlink time slot. In time slot structure 2, all symbols are uplink symbols, and a time slot with time slot structure 2 is an uplink time slot. In time slot structure 3, all symbols are flexible symbols. Time slot structure 4 includes one D / U switching point, where the DL symbol (or UL symbol) before the D / U switching point is different from the UL symbol (or DL ​​symbol) after the D / U switching point. A time slot with one D / U switching point begins with zero or more DL symbols and ends with zero or more UL symbols, with flexible symbols in between. Therefore, a time slot must contain at least one flexible symbol and one DL or one UL symbol, such as... Figure 4A As shown, in time slot structure 4, the first 7 symbols are downlink symbols, the last 5 symbols are uplink symbols, and the middle 2 symbols are flexible symbols. Time slot structure 5 includes 2 D / U switching points. The first 7 symbols of a time slot with 2 D / U switching points begin with 0 or more DL symbols and end with at least 1 UL symbol, with 1 or more flexible symbols in the middle. The last 7 symbols of this time slot begin with 0 or more DL symbols and end with 0 or more UL symbols, with 0 or more flexible symbols in the middle. Figure 4B As shown, in time slot structure 5, symbols 0, 1, 2, 3, 7, 8, 9, and 10 are downlink symbols, symbols 6 and 13 are uplink symbols, and the other symbols are flexible symbols.

[0100] For example Figure 5 Taking the TDD time slot structure configuration shown as an example, Figure 5In this configuration, time slots 0 to 2 are downlink time slots configured for cell-level signaling, time slot 3 includes downlink symbols configured for cell-level signaling, time slot 6 includes uplink symbols configured for cell-level signaling, and time slots 7 to 9 are uplink time slots configured for cell-level signaling. The remaining time slots and symbols are flexible time slots and flexible symbols. If the SFI indicates that time slot 4 corresponds to index 1 and time slot 5 corresponds to index 2, then time slot 4 is configured as the downlink time slot corresponding to time slot structure 1, and time slot 5 is configured as the uplink time slot corresponding to time slot structure 2. This application embodiment does not limit the specific time slot structure for flexible time slot configuration.

[0101] It should be noted that after configuring downlink and / or uplink symbols in cell-level signaling, the SFI can designate the remaining flexible symbols as uplink and / or downlink symbols. The downlink and / or uplink symbols configured in cell-level signaling are not affected by the downlink and / or uplink symbols designated by the SFI.

[0102] For example, based on Figure 3A The configured cell-level time slot structure, Figure 5 In the cell-level signaling configuration, the first three symbols in slot 3 are downlink symbols. SFI cannot indicate the first three symbols in slot 3 as uplink symbols to ensure that the downlink symbols in the cell-level signaling configuration are not affected by SFI indication.

[0103] In summary, network devices can configure the time slot structure through cell-level signaling, or through cell-level signaling and user-specific signaling, or through cell-level signaling and SFI.

[0104] 3. Carrier

[0105] In this embodiment, the carrier may include component carriers or carrier elements in a carrier aggregation scenario, with one component carrier or carrier element corresponding to an independent cell. Carriers can be discontinuous, meaning the frequency domain resources of any two adjacent carriers are discontinuous; carriers can also be continuous, meaning the frequency domain resources of any two adjacent carriers are continuous; or carriers can be partially discontinuous and partially continuous, meaning some adjacent carriers have continuous frequency domain resources while others have discontinuous frequency domain resources. This embodiment does not limit the relationship between carriers. Figure 6A As shown, in a carrier aggregation scenario with three component carriers, carrier 0 corresponds to cell 0, carrier 1 corresponds to cell 1, and carrier 2 corresponds to cell 2. The frequency domain resources between different carriers are discontinuous.

[0106] The carrier can include component carriers in a single-cell multi-carrier scenario, with multiple component carriers corresponding to one cell. That is, to save system signaling and common downlink signaling overhead and simplify cell management, multiple component carriers are aggregated into one cell. Therefore, the carrier in this embodiment represents one component carrier within a cell. Component carriers can be discontinuous, continuous, or partially discontinuous and partially continuous. For example... Figure 6B As shown, a cell 0 includes three component carriers, namely carrier 0, carrier 1, and carrier 2. The frequency domain resources between different carriers are non-contiguous.

[0107] A carrier can include component carriers of a large bandwidth carrier, meaning multiple component carriers correspond to a large bandwidth carrier. These component carriers can be discontinuous, continuous, or partially discontinuous and partially continuous. Essentially, a large bandwidth carrier treats multiple carriers as a single carrier with a larger bandwidth, transmitting signals on that larger bandwidth carrier. This is equivalent to using multiple discontinuous carriers to transmit data together, rather than transmitting data separately on each discontinuous carrier. Figure 6C As shown, a wide-bandwidth carrier is carrier 0. Carrier 0 can be considered as a single carrier with a large bandwidth, combining carrier 1 and carrier 2. The frequency domain range of carrier 0 includes the frequency domain ranges of carrier 1 and carrier 2, and the frequency domain resources between carrier 1 and carrier 2 are discontinuous.

[0108] A carrier can also be understood as a frequency domain resource or bandwidth resource. Therefore, the "carrier" in the scheme provided in this application can also be replaced with "frequency domain resource." That is, at least two carriers can be at least two segments of frequency domain resources, which can be discontinuous, continuous, or partially discontinuous and partially continuous. Figure 6D As shown, the frequency domain resources include three frequency domain resource segments, which can be sequentially identified as frequency domain resource 0, frequency domain resource 1, and frequency domain resource 2. These three frequency domain resource segments are not contiguous.

[0109] 4. Carrier non-overlapping full duplex (CFD) technology

[0110] To avoid the limitation of a relatively fixed uplink / downlink resource allocation in TDD systems, and considering the implementation complexity of network devices, this application proposes a CFD technique. This technique involves dividing uplink and downlink carriers on different carriers at the same time, enabling simultaneous uplink and downlink transmission and improving spectrum utilization and flexibility. Specifically, the uplink carrier is used for uplink transmission, and the downlink carrier is used for downlink transmission.

[0111] In scenarios where CFD operations are introduced into a TDD system, network devices support full-duplex operation, enabling simultaneous uplink reception on the uplink carrier and downlink transmission on the downlink carrier. For terminals, half-duplex operation is possible, meaning that at any given time, only downlink reception on the downlink carrier or uplink transmission on the uplink carrier can occur. Alternatively, terminals can also support full-duplex operation.

[0112] In addition, for scenarios where CFD operations are introduced into TDD systems, this embodiment introduces the concepts of CFD time units and non-CFD time units for ease of distinction and description.

[0113] A CFD time unit can be understood as a time unit that supports CFD operations. In this time unit, network devices perform uplink reception and downlink transmission on the uplink and downlink carriers respectively, thus achieving full-duplex operation on the network device side. This time unit can be called a CFD time unit. A CFD time unit can include CFD time slots, CFD symbols, and CFD mini-time slots. A carrier can be understood as a frequency domain resource or a sub-band; there are no restrictions on this.

[0114] It should be noted that CFD time units can be configured in downlink time slots and / or flexible time slots, in which case the CFD time unit can be called CFD time unit type 1; or, CFD time units can be configured in uplink time slots and / or flexible time slots, in which case the CFD time unit can be called CFD time unit type 2. That is to say, the first time domain range includes CFD time unit type 1 and / or time unit type 2.

[0115] Since different carriers on a CFD time unit can support different transmission directions, it is necessary to indicate the transmission direction corresponding to different carriers on the CFD time unit. When the positions of different carriers are uncertain, it is also necessary to indicate the frequency domain resource positions of different carriers, that is, it is necessary to indicate both the direction and position of different carriers simultaneously.

[0116] Correspondingly, a non-CFD time unit can be understood as a time unit that does not support CFD operations. That is, the carrier corresponding to the same time unit can only support transmission in one direction, and this time unit is called a non-CFD time unit. Non-CFD time units can include non-CFD time slots, non-CFD symbols, and non-CFD mini-time slots, etc.

[0117] In TDD time slot structure configuration, for example, such as Figure 7As shown, with a TDD period P of 10ms and an SCS of 15kHz, a TDD period includes time slots n (the time slot with index n) to n+4 (the time slot with index n+4). Each time slot corresponds to three non-contiguous carriers in the frequency domain: carrier 0 (the carrier with index 0), carrier 1 (the carrier with index 1), and carrier 2 (the carrier with index 2). These three carriers can be contained within the same cell, and the transmission direction of the cell-level signaling configuration can be applied to each carrier within the cell. Specifically, time slots n to n+2 (the time slot with index n+2) are downlink time slots, and the transmission direction of multiple carriers is downlink. Time slot n+3 (the time slot with index n+3) is a flexible time slot, and the transmission direction of multiple carriers can be either downlink or uplink. Time slot n+4 is an uplink time slot, and the transmission direction of multiple carriers is always uplink. Carriers 1, 2, and 3 can also correspond to different cells; there are no restrictions on this.

[0118] Taking the configuration of CFD time unit type 1 as an example, such as Figures 8A to 8C As shown, when the first time domain range includes time slots n+1 to n+3, that is, CFD symbols are configured on time slots n+1 to n+3, the CFD symbols at this time correspond to CFD symbol type 1, and time slots n and n+4 are non-CFD time slots. Figure 8A As shown, within the first time domain, carriers 0 and 2 are transmitted in the downlink direction, while carrier 1 is transmitted in the uplink direction. That is, uplink frequency domain resources (uplink carrier 1) are configured on the frequency domain resources corresponding to the downlink time slots and flexible time slots. For example... Figure 8B As shown, within the first time domain, carrier 0 transmits in the uplink direction, while carriers 1 and 2 transmit in the downlink direction. Figure 8C As shown, within the first time domain, carrier 2 is transmitted in the uplink direction, while carrier 0 and carrier 1 are transmitted in the downlink direction. Figure 8A The CFD slot type 1 shown is the DUD pattern, which means that the frequency domain resources corresponding to the CFD slot consist of an uplink (UL) carrier located in the middle of the channel bandwidth and two downlink (DL) carriers located on both sides of the channel bandwidth. Figure 8B and Figure 8C The CFD slot type 1 shown is DU pattern / UD pattern, which means that the frequency domain resources corresponding to the CFD slot consist of a DL carrier on one side of the channel bandwidth and a UL carrier on the other side of the channel bandwidth.

[0119] Taking the configuration of CFD time unit type 2 as an example, such as Figures 9A to 9CAs shown, when the first time domain range includes time slots n+3 to n+4, that is, CFD symbols are configured on time slots n+3 and n+4, the CFD symbols in this case correspond to CFD symbol type 2, and time slots n to n+2 are non-CFD time slots. Figure 9A As shown, within the first time domain, carriers 0 and 2 are transmitted in the uplink direction, while carrier 1 is transmitted in the downlink direction. That is, downlink frequency domain resources (downlink carrier 1) are configured on the frequency domain resources corresponding to the uplink time slots and flexible time slots. For example... Figure 9B As shown, within the first time domain, carrier 1 and carrier 2 transmit in the uplink direction, while carrier 0 transmits in the downlink direction. Figure 9C As shown, within the first time domain, the transmission direction of carrier 0 and carrier 1 is uplink, and the transmission direction of carrier 2 is downlink. Figure 9A The CFD slot type 2 shown is the UDU pattern, which means that the frequency domain resources corresponding to the CFD slot consist of a downlink (DL) carrier located in the middle of the channel bandwidth and two uplink (UL) carriers located on both sides of the channel bandwidth. Figure 9B and Figure 9C The CFD slot type 2 shown is a DU pattern / UD pattern. This application embodiment does not restrict the carrier corresponding to the CFD symbol or the transmission direction of the carrier.

[0120] It should be noted that for two adjacent carriers, if one carrier transmits in the downlink direction and the other in the uplink direction, a guard band (GB) can be configured between these two carriers. This GB is used to reduce the interference of downlink transmission on the network side to uplink reception on the network side. If the frequency range of the carrier frequency domain resources overlaps with that of the guard band, the network-side equipment cannot perform downlink transmission or uplink reception within that overlapping frequency range.

[0121] It should be noted that when the carrier is considered as a subband, CFD technology can also be called sub-band non-overlapping full duplex (SBFD) technology. The scenario described above for CFD operation may also have other names. CFD is just an example of a name in this application.

[0122] For ease of description, the following uses CFD time units as CFD symbols / CFD time slots as an example to illustrate the methods provided in the embodiments of this application.

[0123] The above content is a brief introduction to some of the concepts or technologies involved in this application.

[0124] This application will primarily discuss efficient utilization and flexible configuration methods for frequency domain resources. Currently, network devices and terminals need to communicate on contiguous frequency domain resources; however, operators' frequency domain resources in low-frequency bands are discontinuous, and the bandwidth within each band is limited. If these discontinuous frequency domain resources are aggregated into a large-bandwidth frequency domain resource, and different frequency domain resources support different transmission directions, the utilization efficiency and scheduling flexibility of frequency domain resources can be effectively improved.

[0125] This application provides a communication method, terminal, network device, and communication system for configuring frequency domain resources. The frequency domain resources include at least two carriers, and a transmission direction is set for each of the at least two carriers within a first time domain. At least one of the at least two carriers has a different transmission direction than the other carriers. The first time domain includes one time unit or multiple consecutive time units. This application provides greater data transmission capacity for the wireless communication system of network devices and terminals by configuring the frequency and time domain resources of multiple carriers in the frequency domain resources.

[0126] This application embodiment can be implemented via electronic devices (including the aforementioned). Figure 1 The wireless communication system 100 includes a terminal 300 and a network device 400, a chip system, and / or functional modules. The chip system may consist of chips or include chips and other discrete devices. The chip system includes at least one processor for implementing the functions involved in the methods executed by the electronic device in the embodiments of this application. The functional modules may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part, for implementing the functions involved in the methods executed by the electronic device in the embodiments of this application.

[0127] This application provides a method for configuring the transmission direction for carriers with determined positions in the frequency domain, as described in Embodiment 1, and a method for configuring the transmission direction for carriers with undetermined positions in the frequency domain, as described in Embodiment 2.

[0128] Example 1

[0129] In this application embodiment, when the carrier's position in the frequency domain is determined, the transmission direction of the carrier configuration can be indicated. The following discusses how this application embodiment improves spectrum resource utilization by configuring the carrier's transmission direction, and how to flexibly configure the carrier's transmission direction. Figure 10 The application provides a communication method that may include the following steps:

[0130] S101, the network device sends a first indication information to the terminal, and the terminal receives the first indication information. The first indication information is used to indicate the transmission direction corresponding to at least two carriers within a first time domain range. At least one of the at least two carriers has a different transmission direction from the other carriers within the at least two carriers. The first time domain range includes one time unit or multiple consecutive time units.

[0131] In the embodiments of this application, the first indication information can be indicated by one or more of higher-layer signaling (such as RRC signaling), MAC-CE, or DCI signaling. For example, the first indication information can be indicated by higher-layer signaling, or the first indication information can be indicated by both higher-layer signaling and DCI signaling.

[0132] In the embodiments of this application, the frequency domain resources of any two adjacent carriers do not overlap.

[0133] At least two carriers can be discontinuous, meaning that the frequency domain resources of any two adjacent carriers in the frequency domain are discontinuous, or they can be continuous, meaning that the frequency domain resources of any two adjacent carriers in the frequency domain are continuous, or some carriers are discontinuous while others are continuous, meaning that the frequency domain resources of some adjacent carriers are continuous while the frequency domain resources of some adjacent carriers are discontinuous.

[0134] In the embodiments of this application, the first time domain range may include at least one downlink time unit, or at least one uplink time unit, or at least one flexible time unit, or at least one uplink time unit and at least one flexible time unit, or at least one downlink time unit and at least one flexible time unit.

[0135] The first time domain range can be part or all of the time units in the time slot structure configured by the network device.

[0136] For example, the first time domain range is the time domain range within a TDD cycle. For example, the first time domain range can be a downlink time slot and a flexible time slot in each TDD cycle (i.e., the first time domain range corresponds to at least one downlink time unit and at least one flexible time unit); the first time domain range can also be an uplink time slot and a flexible time slot in each TDD cycle (i.e., the first time domain range corresponds to at least one uplink time unit and at least one flexible time unit); the first time domain range can also be an uplink time slot in each TDD cycle (i.e., the first time domain range corresponds to at least one uplink time unit); the first time domain range can also be a downlink time slot in each TDD cycle (i.e., the first time domain range corresponds to at least one downlink time unit); the first time domain range can also be a flexible time slot in each TDD cycle (i.e., the first time domain corresponds to at least one flexible time unit).

[0137] In this embodiment, the first indication information can indicate a first time domain range. Specifically, it can be implemented in several ways, including but not limited to:

[0138] Method (1): The first indication information indicates the start or end position of the first time domain range and the length of the first time domain range.

[0139] Optionally, the first indication information may include the index of the starting time unit of the first time domain range, and the number of time units. Taking a time unit as a time slot as an example, such as... Figure 11A As shown, the TDD period P is 10ms, the SCS is 15kHz, and one TDD period includes 10 time slots (i.e., time slot n to time slot n+9). The time slot configuration is "DDDDFFFFUU", where "D" represents DL time slot, "F" represents flexible time slot, and "U" represents UL time slot. The first indication information includes first information, which is used to indicate the position of the time unit in the first time domain range. The CFD time slot type included in the first time domain range is CFD time slot type 1. The first information indicates that the starting CFD time slot is time slot n, and the number of CFD time slots is 5, which are sequentially configured on the first 4 DL time slots and the first F time slot. Therefore, the first time domain range includes the first 5 time slots in one TDD period.

[0140] Optionally, the first indication information may include the index of the end time unit of the first time domain range, and the number of time units. For example... Figure 11A As shown, taking time units as time slots as an example, the end of the CFD time slot is time slot n+4, and the number of CFD time slots is 5. Then the first time domain range includes the first 5 time slots in a TDD cycle.

[0141] Optionally, the first indication information can be indicated by the start symbol position and length indicator value (SLIV), that is, by jointly encoding the start time unit and the number of time units.

[0142] Method (2): The first indication information indicates the start and end positions of the first time domain range.

[0143] For example, the first indication information may include the index of the start time unit and the index of the end time unit within the first time domain range. Taking time units as time slots and symbols as an example, the first indication information may include the start time slot index, the start symbol index of the start time slot, the end time slot index, and the end symbol index of the end time slot. Taking time units as time slots and symbols as an example, such as... Figure 11BAs shown, the TDD period P is 10ms, the SCS is 15kHz, the time slot configuration is "DDDDFFFFUU", and the first indication information includes first information, which is used to indicate the position of the time unit in the first time domain range. The CFD symbol type included in the first time domain range is CFD symbol type 1. The first information indicates that the starting CFD symbol is symbol 3 in time slot n and the ending CFD symbol is symbol 4 in time slot n+4. Then the first time domain range includes the following time slots and symbols: the last 11 symbols of time slot n, time slots n+1 to n+3, and the first 6 symbols of time slot n+4.

[0144] In this embodiment, the first information can indicate the information contained in the above-described methods (1)-(2), used to indicate the first time domain range. The first information can be carried in cell-level signaling. That is, the cell-level signaling can configure the first time domain range while configuring the cell-level time slot structure. It is understood that after the cell-level signaling is configured, the time units in the first time domain range become CFD time units.

[0145] For example, cell-level signaling includes, but is not limited to, RRC signaling, and the first information includes, but is not limited to, the signaling carried in TDD uplink / downlink common configuration signaling. The signaling used to configure the cell-level timeslot structure and the signaling used to configure the first time domain range can be the same signaling, such as the TDD uplink / downlink common configuration information element (TDD-UL-DL-ConfigCommonIE), or they can be different signaling, for example, the cell-level timeslot structure is configured through TDD-UL-DL-ConfigCommon IE, and the first time domain range is configured through the CFD common configuration information element CFD-ConfigCommon IE, etc. When the first information is configured in TDD-UL-DL-ConfigCommon IE, TDD-UL-DL-ConfigCommon IE includes TDD uplink / downlink mode (TDD-UL-DL-pattern) information. The TDD-UL-DL-pattern information is used to configure the TDD pattern. The TDD-UL-DL-pattern information may further contain the first information. Optionally, the first information is configured in the newly added SBFD pattern information in TDD-UL-DL-ConfigCommon IE.

[0146] In other embodiments, the first indication information includes second and third information. That is, in the above methods (1)-(2), the first indication information can also indicate a first time domain range by including the second and third information. The second information is used to indicate the location of a portion of time units within the first time domain range, and the third information is used to indicate the location of another portion of time units within the first time domain range, wherein the other portion of time units is a flexible time unit not configured in the cell-level signaling. For example, the second information can be carried in the cell-level signaling, and the third information can be carried in the user-specific signaling; or, the second information can be carried in the cell-level signaling, and the third information can be carried in the dynamic SFI.

[0147] In other words, while configuring the cell-level time slot structure, cell-level signaling can also configure some or all time units in the cell-level time slot structure to belong to the first time domain. For example, in the cell-level time slot structure configured by cell-level signaling, the first 4 time slots in the TDD cycle have been configured as downlink time slots. If the first 3 time slots in the TDD cycle are configured as CFD time slots, then the first 3 time slots configured by cell-level signaling (i.e., some time units in the cell-level time slot structure) belong to the first time domain. If the first 4 time slots in the TDD cycle are configured as CFD time slots, then all 4 time slots configured by cell-level signaling belong to the first time domain. Similarly, user-specific signaling can configure some or all time units in the UE-level time slot structure to belong to the first time domain range. For example, in cell-level signaling configuration, the first three time slots in a TDD cycle are configured as downlink time slots, and the fourth and fifth time slots are flexible time slots. If the user-specific signaling configures the fourth and fifth time slots in the TDD cycle as CFD time slots, then all time units configured in the UE-level time slot structure belong to the first time domain range. If the fourth time slot in the TDD cycle is configured as a CFD time slot and the fifth time slot is configured as an uplink time slot, then the fourth time slot in the UE-level time slot structure belongs to the first time domain range, while the fifth time slot does not. That is, some time units in the UE-level time slot structure belong to the first time domain range. Similarly, dynamic SFI can indicate that some or all flexible time units configured in cell-level signaling or user-specific signaling belong to the first time domain range. The terminal can determine the time units configured in the second and third information as the first time domain range. Understandably, after configuring the first instruction information, the time unit in the first time domain range becomes the CFD time unit.

[0148] For example, a portion of the time units within the first time domain range can be configured first using the second information, and then another portion of the time units within the first time domain range can be configured using the third information. For ease of description, the portion of the time units within the first time domain range configured by the second information is referred to as the first portion of the time units, and the other portion of the time units within the first time domain range configured by the third information is referred to as the second portion of the time units.

[0149] In this embodiment, the second information is carried in the cell-level signaling, indicating the first time unit; the third information is carried in the user-specific signaling or dynamic SFI, indicating the second time unit. The indication of the first and second time units can be implemented in several ways, including but not limited to:

[0150] Method (1): The second information indicates the start and end positions of the first time unit; the third information indicates the start and end positions of the second time unit, and the third information is carried in the cell-level signaling.

[0151] Optionally, the second information may include the index of the start / end time unit of the first time unit, and the number of time units; the third information may include the index of the start / end time unit of the second time unit, and the number of time units. Taking a time unit as a time slot as an example, such as... Figure 11C As shown, the TDD time slot configuration period P is 10ms, the SCS is 15kHz, and the TDD time slot configuration is "DDDDFFFFUU". The first time domain range includes CFD symbol type 1. The second information indicates that the starting CFD time slot is time slot n, and the number of CFD time slots is 5. Therefore, the first part of the time unit includes the first 5 time slots (i.e., time slot n to time slot n+4). The third information indicates that the starting CFD time slot is time slot n+5, and the number of CFD time slots is 3. Therefore, the second part of the time unit includes the 3 time slots n+5 to n+7.

[0152] Optionally, the second information may include the index of the end time unit of the first time unit, and the number of time units. For example... Figure 11C As shown, taking time units as time slots as an example, the end of the CFD time slot is time slot n+4, and the number of CFD time slots is 5. Then the first part of the time unit includes the first 5 time slots of a TDD cycle.

[0153] Optionally, the third information may include the index of the end time unit of the second time unit, as well as the number of time units. For example... Figure 11C As shown, taking time units as time slots as an example, the end of the CFD time slot is time slot n+7, and the number of CFD time slots is 3. Then the second part of the time unit includes time slots n+5 to n+7 in one TDD cycle.

[0154] Optionally, the third information indicates the start and end positions of the second time unit. For example... Figure 11CAs shown, taking time units as time slots as an example, the starting CFD time slot is time slot n+5, and the ending CFD time slot is time slot n+7. Then the second part of the time unit includes time slots n+5 to n+7 in one TDD cycle.

[0155] Method (2): The second information indicates the start and end positions of the first time unit, and the third information is carried in the dynamic SFI. The third information indicates the position of the second time unit through a terminal-specific time slot format table.

[0156] For example, the second information may include the index of the start time unit and the index of the end time unit in the first part of the time unit, and the third information may indicate the time unit of the second part through a terminal-specific time slot format table. The terminal-specific time slot format table can be referred to the aforementioned description of the SFI indicating time slot structure, which will not be repeated here.

[0157] Optionally, a new row can be added to the terminal time slot format table. This new row includes uplink symbols, downlink symbols, flexible symbols, and CFD symbols. The location of the CFD symbols can then be dynamically indicated via the SFI. The SFI can only indicate flexible symbols configured in cell-level or user-level signaling as CFD symbols. Taking time units as time slots and symbols as an example, the first indication information can include second and third information. The second information is carried in the cell-level signaling, indicating the index of the starting CFD time slot, the index of the starting CFD symbol within the starting CFD time slot, the index of the ending CFD time slot, and the index of the ending CFD symbol within the ending CFD time slot. The third information is carried in the SFI. For example... Figure 11D As shown, the TDD time slot configuration is "DDDDFFFFFU". The first time domain range includes CFD symbol type 1, and one TDD time slot includes 14 symbols (i.e., symbols 0 to 13). The second information indicates that the starting CFD symbol is symbol 3 in time slot n and the ending CFD symbol is symbol 13 in time slot n+4. Therefore, the first part of the time unit includes the following time slots and symbols: the last 11 symbols of time slot 0, and time slots n+1 to n+4. The third information indicates that the starting CFD symbol is symbol 0 in time slot n+5 and the ending CFD symbol is symbol 5 in time slot n+8. Therefore, the second part of the time unit includes the following time slots and symbols: time slots n+5 to n+7, and the first 5 symbols of time slot n+8.

[0158] In other words, in the above methods (1)-(2), the first indication information can indicate the first part of the time unit in the first time domain range through the second information, and can also indicate the second part of the time unit through the third information, thereby indicating the complete first time domain range through the first part of the time unit and the second part of the time unit.

[0159] It should be noted that if the first indication information only contains the first information, the terminal can determine the first time domain range in the current and subsequent TDD cycles after receiving the first indication information, and the time units in the first time domain range are all CFD time units. If the first indication information contains the second and third information, the terminal can also receive the third information (such as user-specific signaling or dynamic SFI) to update the first time domain range to adapt to the communication needs of different uplink and downlink transmission scenarios. The specific length of the first time domain range is not limited in the embodiments of this application.

[0160] In this embodiment of the application, the first indication information may also indicate the transmission direction corresponding to at least two carriers. Specifically, this can be achieved in the following ways, including but not limited to:

[0161] Method 1: The network device directly configures the transmission direction of each carrier.

[0162] Specifically, the first indication information may include the indices of at least two carriers and the transmission directions corresponding to at least two carriers.

[0163] For example, such as Figure 12A As shown, the frequency domain resources include five carriers, from carrier m (i.e., the carrier with index m) to carrier m+4 (i.e., the carrier with index m+4). During the TDD cycle, time slots n to n+5 are downlink time slots, time slots n+6 to n+7 are flexible time slots, and time slots n+8 to n+9 are uplink time slots. The first time domain range indicated by the first information includes time slots n to n+5.

[0164] In some implementations, the network device is configured with a downlink carrier list, which includes carrier indices, the transmission direction of which is downlink. For example, if the downlink carrier list indices indicated by the first indication information include m, m+1, m+3, and m+4, then in the frequency domain corresponding to the first time domain range, the transmission directions of carriers m, m+1, m+3, and m+4 are downlink. Similarly, the network device is also configured with an uplink carrier list, which includes indices of carriers with uplink transmission directions. For example, if the first indication information indicates that the uplink carrier list index includes m+2, then in the frequency domain corresponding to the first time domain range, the transmission direction of carrier m+2 is uplink. This application embodiment does not limit the specific method of indicating the carrier transmission direction. Outside the first time domain range, the network device can determine the carrier transmission type based on the type of time unit in the TDD cycle.

[0165] Method 2: The network device indicates the transmission direction and resource length corresponding to multiple frequency domain resources in a large bandwidth cell, and the terminal determines the transmission direction corresponding to each carrier based on the position and direction of the frequency domain resources where at least two carriers are located.

[0166] Specifically, the first indication information may include the starting resource block position and the length information of consecutive resource blocks for each frequency domain resource. For example, the starting position and length information of each frequency domain resource can be indicated by a Resource Indicator Value (RIV), meaning the starting position and length information are jointly encoded. Optionally, the first indication information may also indicate the starting position and resource length information of each frequency domain resource separately. For multiple frequency domain resources, the first indication information may indicate the RIV corresponding to each frequency domain resource. For example, the first indication information includes a frequency domain resource list, which contains the corresponding RIV for each uplink frequency domain resource and each downlink frequency domain resource. Optionally, the first indication information includes an uplink frequency domain resource list and a downlink frequency domain resource list, where the uplink frequency domain resource list contains the RIV corresponding to each uplink frequency domain resource, and the downlink frequency domain resource list contains the RIV corresponding to each downlink frequency domain resource. The transmission direction of each carrier in the first time domain range is determined by the direction of the frequency domain resources that overlap with it. If the carrier overlaps with downlink frequency resources, the transmission direction of the carrier is downlink. If the carrier overlaps with uplink frequency resources, the transmission direction of the carrier is uplink.

[0167] For example, such as Figure 12B As shown, frequency domain resources are divided into frequency domain resource 0, frequency domain resource 1, and frequency domain resource 2. Different frequency domain resources correspond to non-overlapping frequency ranges. Frequency domain resources 0 and 2 correspond to downlink transmission, while frequency domain resource 1 corresponds to uplink transmission. If the frequency domain resources corresponding to carriers m and m+1 overlap with frequency domain resource 0, then the transmission direction of carriers m and m+1 is downlink. If the frequency domain resources corresponding to carrier m+2 overlap with frequency domain resource 1, then the transmission direction of carrier m+2 is downlink. If the frequency domain resources corresponding to carriers m+3 and m+4 overlap with frequency domain resource 2, then the transmission direction of carriers m+3 and m+4 is downlink. Within the TDD cycle, time slots n to n+5 are downlink time slots, time slots n+6 to n+7 are flexible time slots, and time slots n+8 to n+9 are uplink time slots. The first time domain range indicated by the first information includes time slot n to time slot n+5, meaning that time slots n to n+5 are CFD time slots, from which the transmission direction of each carrier corresponding to the CFD time slot can be obtained. The transmission direction of the carrier corresponding to the time unit outside the first time domain range is determined according to the transmission direction corresponding to the TDD time unit.

[0168] Method 3: The network device groups multiple carriers and indicates the transmission direction of at least two carrier groups through the first indication information, thereby indicating the transmission direction of the carriers in at least two carrier groups.

[0169] Wherein, at least one of the at least two carrier groups has a different transmission direction from the other carrier groups in the at least two carrier groups, and the carrier group includes at least one carrier.

[0170] Specifically, the first indication information may include the indices of at least two carrier groups and the transmission direction information corresponding to at least two carrier groups.

[0171] For example, such as Figure 12C As shown, at least two carrier groups include carrier group 0 (i.e., the carrier group with index 0), carrier group 1 (i.e., the carrier group with index 1), and carrier group 2 (i.e., the carrier group with index 2). Carrier group 0 includes carrier m and carrier m+1, carrier group 1 includes carrier m+2, and carrier group 2 includes carrier m+3 and carrier m+4. During the TDD cycle, time slots n to n+5 are downlink time slots, time slots n+6 to n+7 are flexible time slots, and time slots n+8 to n+9 are uplink time slots. The first time domain range indicated by the first information includes time slots n to n+5.

[0172] In some implementations, the network device may be configured with a downlink carrier group list, which includes indices of carrier groups whose transmission direction is downlink, indicating that the transmission direction of these carrier groups is downlink. For example, if the first indication information indicates that the indices in the downlink carrier group list include 0 and 2, then in the frequency domain corresponding to the first time domain range, carriers m and m+1 in carrier group 0, and carriers m+3 and m+4 in carrier group 2, have a downlink transmission direction. Similarly, the network device may be configured with an uplink carrier group list, which includes indices of carrier groups whose transmission direction is uplink, indicating that the transmission direction of these carrier groups is uplink. For example, if the first indication information indicates that the index in the uplink carrier group list includes 1, then in the frequency domain corresponding to the first time domain range, carrier m+2 in carrier group 1 performs uplink transmission.

[0173] In another implementation, the network device can configure the start position and length of one or more downlink frequency domain resources, and the start position and length of one or more uplink frequency domain resources. For example, the network device can indicate the start position and length of multiple downlink and uplink frequency domain resources via RIV (Redirecting Indicator Vehicle), thus determining the transmission direction of the carriers included in a carrier group and the direction of the overlapping frequency domain resources. For example, if carrier group 0 and carrier group 2 overlap with downlink frequency domain resources, then the transmission direction of carrier m and carrier m+1 in carrier group 0, and carrier m+3 and carrier m+4 in carrier group 2, is downlink. Similarly, if carrier group 1 overlaps with uplink frequency domain resources, the transmission direction of carrier m+2 in carrier group 1 is uplink.

[0174] Outside the first time domain range, network devices can determine the carrier transmission type based on the type of time unit in the TDD cycle. In other words, through any of the methods described in methods one through three, the first indication information can indicate the carrier transmission direction in the frequency domain resources.

[0175] Optionally, the first indication information may also indicate the transmission direction of the above-mentioned at least two carriers within the second time domain, similar to the way the transmission direction of the above-mentioned at least two carriers within the first time domain is indicated. It can be understood by referring to the way the transmission direction of at least two carriers is configured within the first time domain, and will not be repeated here.

[0176] The second time domain range and the first time domain range are located within the same TDD cycle and do not overlap. The first indication information can also indicate other time domain ranges within the TDD cycle, without limitation.

[0177] Taking time units as time slots and symbols as an example, the first time domain range contains CFD symbol type 1, and the second time domain range contains CFD symbol type 2. For example, as shown... Figure 13A As shown, the TDD period P is 10ms and the SCS is 15kHz. Therefore, one TDD period includes 10 time slots (i.e., slot n to slot n+9), configured as "DDDDDFFFUU", where "D" represents the DL time slot, "F" represents the flexible time slot, and "U" represents the UL time slot. The first indication information indicates that the CFD symbols included in the first time domain range are symbol 0 of slot n to symbol 4 of slot n+5, and the CFD symbols included in the second time domain range are symbol 2 of slot n+7 to symbol 13 of slot n+9. The remaining time slots and symbols are flexible time slots and flexible symbols. Different carriers corresponding to CFD time slots and CFD symbols have different transmission directions. In the frequency domain corresponding to the first time domain range, carriers m, m+1, m+3, and m+4 are all configured for downlink, and carrier m+2 is configured for uplink. In the frequency domain corresponding to the second time domain range, carriers m, m+1, m+3, and m+4 are all configured for uplink, and carrier m+2 is configured for downlink. Outside of the first and second time domains, network devices can determine the carrier transmission type based on the type of time unit in the TDD cycle.

[0178] For example, such as Figure 13BAs shown, the TDD period P is 10ms and the SCS is 30kHz. Therefore, one TDD period includes 20 time slots (i.e., time slot n to time slot n+19), configured as "DDDDDDDFFFFFFFFFUUUU". The first indication information indicates that the CFD symbols included in the first time domain range are symbol 0 of time slot n to symbol 4 of time slot n+7, and the CFD symbols included in the second time domain range are symbol 11 of time slot n+15 to symbol 13 of time slot n+19. The remaining time slots and symbols are flexible time slots and flexible symbols. Different carriers corresponding to CFD time slots and CFD symbols have different transmission directions. In the frequency domain corresponding to the first time domain range, carriers m, m+1, m+3, and m+4 are all configured for downlink, and carrier m+2 is configured for uplink. In the frequency domain corresponding to the second time domain range, carriers m, m+1, m+3, and m+4 are all configured for uplink, and carrier m+2 is configured for downlink. Outside of the first and second time domains, network devices can determine the carrier transmission type based on the type of time unit in the TDD cycle.

[0179] In this embodiment of the application, the above method further includes: a network device sending second indication information, and a terminal receiving the second indication information, the second indication information being used to indicate the switching of the transmission direction of some or all of the at least two carriers.

[0180] The carrier transmission directions include uplink, downlink, and uplink plus downlink, which can be understood as uplink and downlink transmissions occurring simultaneously and at the same frequency on the same carrier. In other words, when the carrier performs uplink plus downlink transmission, the frequency domain resources of the Physical Downlink Shared Channel (PDSCH) and the Physical Uplink Shared Channel (PUSCH) can overlap, thus doubling the spectral efficiency of the wireless communication link.

[0181] Therefore, carrier switching transmission directions include the following cases: uplink switching to downlink, downlink switching to uplink, uplink switching to both uplink and downlink, downlink switching to both uplink and downlink, etc.

[0182] In the embodiments of this application, the transmission direction of the carrier is indicated in the following ways, including but not limited to:

[0183] Method 1: The second indication information indicates that the transmission direction of all carriers should be switched.

[0184] In some implementations, after receiving the second indication information, the terminal switches the transmission direction of all carriers. For example, the switching methods include uplink to downlink and downlink to uplink, i.e., the transmission directions of each carrier are switched to opposite directions. Specifically, the first time domain range includes the first 8 time slots of a TDD cycle, and the second time domain range includes the last 5 time slots of a TDD cycle. Figure 13B In the first time domain, carriers m, m+1, m+3, and m+4 correspond to downlink transmission in the first time domain and uplink transmission in the second time domain; carrier m+2 corresponds to uplink transmission in the first time domain and downlink transmission in the second time domain. Upon receiving the second indication information, the transmission directions of all carriers are switched, as follows: Figure 14A As shown, carriers m, m+1, m+3 and m+4 are uplink in the frequency domain corresponding to the first time domain range, and downlink in the transmission direction corresponding to the second time domain range. Carrier m+2 is downlink in the transmission direction corresponding to the first time domain range, and uplink in the transmission direction corresponding to the transmission direction corresponding to the second time domain range.

[0185] Optionally, the second indication information can indicate a change in the transmission direction for a specific TDD period. For example, if the second indication information is DCI 2_0, and the terminal receives the second indication information in TDD period n, it means that the transmission direction of the carrier has changed within TDD period n, or that the transmission direction of the carrier has changed within several consecutive periods after the terminal receives the second indication information (e.g., from TDD period n to TDD period n+1). Note that DCI 2_0 can only rewrite the transmission direction of the flexible time unit; it cannot change the transmission direction of the already configured uplink and downlink time units.

[0186] In some implementations, the second indication information may not contain any carrier information. That is, if the second indication information does not indicate a switch in the transmission direction for any carrier, it is assumed that all carriers must switch their transmission directions. For example, the second indication information can be carried in a dynamic SFI (Signal Function Index), where a field (such as the first field) indicates whether to switch the transmission direction of all carriers. For example, the first field of the dynamic SFI contains one bit. A value of 1 indicates a switch in the transmission direction of all carriers, and a value of 0 indicates that the transmission direction of the carriers is not switched. For instance, if the current carrier is configured in DUD mode, a value of 0 in the first field indicates no switch; otherwise, it indicates a switch to UDU mode. If the current carrier is configured in DU mode, a value of 0 in the first field indicates no switch; otherwise, it indicates a switch to UD mode.

[0187] For example, the second indication information can be carried in the dynamic SFI, and the carrier direction switching is indicated by the dynamic direction switching field in DCI 2-0. The dynamic direction switching field can contain one or more bits. For example, if the bit corresponding to the dynamic direction switching field is 0, it indicates that the current carrier configuration has switched to CFD symbol type 2 mode (e.g., UDU mode); if the bit corresponding to the dynamic direction switching field is 1, it indicates that the current carrier configuration has switched to CFD symbol type 1 mode (e.g., DUD mode), etc. This application embodiment does not impose any limitations. Wherein, if the current carrier configuration is DUD mode and the dynamic direction switching field in the SFI is 1, then the current carrier configuration has switched to UDU mode; if the current carrier configuration is UDU mode and the dynamic direction switching field in the SFI is 0, then the current carrier configuration does not need to be switched.

[0188] It should be noted that when the second indication information is dynamic SFI, the second indication information can only change the transmission direction of the carrier corresponding to the flexible time unit determined by the cell-level signaling or user-specific signaling, and cannot modify the transmission direction of the carrier corresponding to the uplink / downlink time unit determined by the cell-level signaling or user-specific signaling.

[0189] In some implementations, the second indication information can be carried in the RRC signaling. For example, the second indication information is in the dynamic direction indication (dynamicDirectionIndicator) information element of the RRC signaling. The dynamicDirectionIndicator information element can be configured in the Servingcell-configcommon signaling or the Servingcell-specific configuration signaling. The second indication information includes two optional values: one value indicates a switch from uplink / downlink to downlink / uplink, and the other value indicates a switch between half-duplex (uplink / downlink) and full-duplex (uplink plus downlink). For example, the two optional values ​​can be half-duplex and full-duplex. Half-duplex can indicate a switch from uplink to downlink, or from downlink to uplink; full-duplex can indicate a switch from uplink to uplink plus downlink and / or from downlink to uplink plus downlink. When the second indication information is full-duplex, it also needs to be combined with the indication information in the DCI to realize the switch of transmission direction. For example, if the indication information in the DCI is 1, then the carrier transmission direction is allowed to switch from uplink to uplink plus downlink and / or the carrier is allowed to switch from downlink to uplink plus downlink. This application does not limit the specific method by which the second indication information indicates the carrier to switch transmission directions.

[0190] Optionally, the indication of how to switch transmission directions can be configured for all carriers or for each carrier individually; this application does not impose any restrictions.

[0191] Optionally, a new row can be introduced into the UE-specific timeslot format table. Each row can contain downlink symbols, uplink symbols, flexible symbols, and uplink plus downlink symbols. If DCI 2-0 indicates a flexible symbol configured at the cell level or UE level as an uplink plus downlink symbol, then the transmission direction of the carrier corresponding to that symbol is switched to uplink plus downlink. Optionally, a UE-specific transmission direction format table can be defined to dynamically indicate the transmission direction corresponding to the carrier. The table contains multiple transmission direction patterns, and each pattern can correspond to an index. The second indication information can indicate the index in the transmission direction format table, indicating that the carrier's transmission direction is switched to the transmission direction corresponding to that index.

[0192] Method 2: The second indication information indicates that the transmission direction of one or more carriers is switched.

[0193] In some implementations, after receiving the second indication information, the terminal switches the transmission direction of one or more carriers. For example, the second indication information includes one or more bits for switching the transmission direction of one or more carriers with the same transmission direction. Specifically, the first time domain range includes the first eight time slots in a TDD cycle, such as... Figure 13B As shown, in the frequency domain corresponding to the first time domain range, the transmission directions of carriers m, m+1, m+3, and m+4 are all downlink, while the transmission direction of carrier m+2 is uplink, meaning the carrier is configured in DUD mode. The second indication information received by the terminal is "101", where "1" indicates switching the transmission direction of the downlink carrier and "0" indicates not changing the transmission direction of the uplink carrier. This second indication information can indicate that the transmission direction of carriers m, m+1, m+3, and m+4 in the DUD mode of carrier configuration is switched from downlink to uplink, as shown below. Figure 14B As shown, in the frequency domain corresponding to the first time domain range, the transmission directions of carriers m, m+1, m+3, and m+4 switch to uplink, while carrier m+2 does not switch its transmission direction. For example, the second time domain range includes the last five time slots of a TDD cycle. For example, if the second indication information does not indicate that the carrier changes its transmission direction, the transmission direction of the carrier remains unchanged within the second time domain range, such as... Figure 13B and Figure 14B As shown, in the frequency domain corresponding to the second time domain range, the transmission directions corresponding to carriers m, m+1, m+3 and m+4 are uplink, and the transmission direction corresponding to carrier m+2 is downlink.

[0194] In some implementations, the second indication information includes information on the transmission direction of one or more carriers. That is, if the second indication information indicates that one or more carriers should switch their transmission direction, then the one or more carriers will switch their transmission direction. For example, the second indication information may set the transmission direction of some carriers, switching some or all carriers from downlink to uplink, or switching some or all carriers from uplink to downlink, or switching carrier configuration from other modes (including DUD mode, UDU mode, DU mode, UD mode, etc.) to downlink transmission (DL) mode or uplink transmission (UL) mode, etc., which will not be elaborated further.

[0195] In some implementations, the second indication information may include a bitmap containing the same number of bits as the at least two carriers, with one bit corresponding to one carrier. If the value of the bit corresponding to a carrier is 1 (or 0), the transmission direction of that carrier is switched. For example, the first time domain range includes the first 8 time slots in a TDD cycle. Figure 13B In the first time domain range, within the corresponding frequency domain, carriers m, m+1, m+3, and m+4 all transmit in downlink direction, while carrier m+2 transmits in uplink direction. The second information includes a bitmap with five bits labeled "11100," each corresponding to a carrier. "1" represents a carrier switching transmission direction, and "0" represents a carrier maintaining its transmission direction. This bitmap "11100" indicates that the transmission directions of carriers m and m+1 remain unchanged, while the transmission directions of carriers m+2 to m+4 switch. For example... Figure 14C As shown, in the frequency domain corresponding to the first time domain range, the transmission direction corresponding to carrier m and carrier m+1 remains downlink, the transmission direction of carrier m+2 switches to downlink, and the transmission direction corresponding to carrier m+3 and carrier m+4 switches to uplink. In some embodiments, a bit value of "0" represents that the carrier switches the transmission direction, and "1" represents that the carrier maintains the transmission direction. The specific bit value for switching the carrier transmission direction is not limited in the embodiments of this application.

[0196] Optionally, the transmission direction switch indicated by the second indication information can be a default, such as a default carrier transmission direction switch from uplink to downlink, downlink to uplink, or a default carrier transmission direction switch from uplink to uplink plus downlink, downlink to uplink plus downlink, etc. If the second indication information does not indicate a transmission direction switch, then the transmission direction is not switched. For example, the second time domain range includes the last 5 time slots of a TDD cycle. When the second indication information does not indicate a change in carrier transmission direction, the carrier's transmission direction remains unchanged within the second time domain range, such as... Figure 13B and Figure 14CAs shown, in the frequency domain corresponding to the second time domain range, the transmission directions of carriers m, m+1, m+3 and m+4 are all uplink, while the transmission direction of carrier m+2 is downlink.

[0197] In this embodiment, when spectrum resources are limited and both uplink and downlink transmission demands increase in a wireless communication system, the carrier transmission direction can be switched to an uplink plus downlink carrier to alleviate the pressure on uplink and downlink transmission in the wireless communication system and improve spectrum utilization. The uplink plus downlink transmission mode on the same carrier can improve the utilization efficiency of frequency domain resources and data transmission rate, enabling full-duplex communication to meet future high data transmission rate requirements.

[0198] In some implementations, the second indication information can instruct the carrier to switch to an uplink plus downlink transmission mode. For example, the first time domain range includes the first eight time slots of a TDD cycle. Figure 13B In the frequency domain corresponding to the first time domain range, the transmission directions of carriers m, m+1, m+3, and m+4 are all downlink, while the transmission direction of carrier m+2 is uplink. For example... Figure 14D As shown, the second indication information is "11100", where "1" represents the carrier switching transmission direction and "0" represents the carrier maintaining the transmission direction. The indication information in DCI is 1, indicating that the carrier is allowed to switch to uplink plus downlink. In the frequency domain corresponding to the first time domain range, the transmission direction corresponding to carrier m+2 to carrier m+4 is switched to uplink plus downlink, while the transmission direction corresponding to carrier m and carrier m+1 remains unchanged as downlink.

[0199] It is important to note that network devices must have the capability to simultaneously perform uplink and downlink transmissions before switching the carrier transmission direction to uplink plus downlink. If the terminal side only has half-duplex capability, the network device and different terminals will simultaneously perform uplink and downlink transmissions on the same carrier. If the terminal side has the capability for simultaneous full-duplex transmission on the same frequency, the network device and the same terminal will simultaneously perform uplink and downlink transmissions on the same carrier. The network device can also instruct the carrier to maintain its current transmission direction, switch to uplink, or switch to downlink. This application does not limit the specific transmission direction after carrier switching.

[0200] In other words, in both Method 1 and Method 2, the second indication information can flexibly switch the transmission direction of the carrier, improve the utilization efficiency of frequency domain resources and data transmission rate, and better adapt to different uplink and downlink transmission scenario requirements.

[0201] S102, the network device and terminal transmit and / or receive on at least two carriers based on the first indication information.

[0202] Specifically, in the frequency domain corresponding to the first time domain range, network devices and terminals can perform uplink transmission on the carrier corresponding to the uplink transmission indicated by the first indication information, and downlink transmission on the carrier corresponding to the downlink transmission; this application does not impose any restrictions. In other time domain resources outside the first time domain range, the transmission type is determined according to the type of time unit in the TDD cycle, and thus the transmission method is determined.

[0203] Understandably, when the uplink transmission demand in the wireless communication system 100 increases, the first indication information can configure more uplink carriers to alleviate the pressure on uplink transmission in the wireless communication system 100. Similarly, when the downlink transmission demand in the wireless communication system 100 increases, the first indication information can configure more downlink carriers to alleviate the pressure on downlink transmission in the wireless communication system 100.

[0204] It is understood that the solution provided in this application embodiment can indicate the transmission direction of multiple frequency domain resources (such as multiple carriers, multiple sub-bands, etc.). Compared with configuring the transmission direction for a single frequency domain resource (such as a single carrier, a single sub-band, etc.), the solution provided in this application embodiment can provide more frequency domain resources, increase the transmission bandwidth between network devices and terminals, and thus improve the maximum data transmission efficiency in the wireless communication system 100.

[0205] Example 2

[0206] In this embodiment, when the location of frequency domain resources is undetermined, it is necessary to configure the frequency domain location and transmission direction of each contiguous resource. Frequency domain resources include carriers. The frequency domain location of a carrier can be indicated using a method such as RIV (Reference Indicator Variant) to specify the starting resource block (RB) and the number of resource blocks for each carrier. The carrier configuration can specifically include the following steps:

[0207] Step 1: The network device sends a third indication message, which is used to indicate the transmission direction corresponding to at least two carriers (or frequency domain resources) within a first time domain range. At least one of the at least two carriers has a different transmission direction from the other carriers within the at least two carriers. The first time domain range includes one time unit or multiple consecutive time units.

[0208] Specifically, the third indication information indicates the transmission direction corresponding to at least two carriers within the first time domain. This can be referred to in the aforementioned embodiment 1, where the first indication information indicates the transmission direction corresponding to at least two carriers within the first time domain. This will not be repeated here.

[0209] In this embodiment, the third indication information includes configuration information for configuring the positions of the at least two carriers. This third indication information can be carried in the uplink frequency domain information (FrequencyInfoUL-SIB) and the downlink frequency domain information (FrequencyInfoDL-SIB). For example, the third indication information introduces new parameters into the information elements of FrequencyInfoUL-SIB, such as uplink carrier position (FrequencyLocationULcarrier), uplink subband position (FrequencyLocationULsubband), uplink resource position (FrequencyLocationULresource), etc., to configure the positions of the uplink carrier, uplink subband, or uplink frequency domain resource. Similarly, the third indication information introduces new parameters into the information elements of FrequencyInfoDL-SIB (e.g., downlink carrier position (FrequencyLocationDLcarrier), downlink subband position (FrequencyLocationDLsubband), downlink resource position (FrequencyLocationDLresource), etc.) to configure the positions of the downlink carrier, downlink subband, or downlink resource. The locations of carrier, subband, and frequency domain resources can all be indicated using RIV (Radio Interchangeable Image). Optionally, the locations of carrier, subband, and frequency domain resources can be indicated by specifying the number of start and end resource blocks.

[0210] For example, such as Figure 15 As shown, the frequency domain resources include frequency domain resource 0, frequency domain resource 1, and frequency domain resource 2. Frequency domain resources used for downlink transmission include frequency domain resource 0 and frequency domain resource 2, while frequency domain resources used for uplink transmission include frequency domain resource 1. The third indication information is used to indicate the starting position and the number of resource blocks for each frequency domain resource. Since the frequency domain resource can be a carrier, the indication of the carrier's position and transmission direction can refer to the indication of the frequency domain resource's position and transmission direction, which will not be elaborated further. Specifically, the third indication information indicates the starting position 0 of frequency domain resource 0 (e.g., resource block 0, representing the first resource block), the starting position 1 of frequency domain resource 1 (e.g., resource block 5, representing the sixth resource block), and the starting position 2 of frequency domain resource 2 (e.g., resource block 10, representing the eleventh resource block). The number of resource blocks in frequency domain resources 0, 1, and 2 is 5. In this embodiment, there is no limitation on the starting position and the number of resource blocks for each frequency domain resource.

[0211] Step 2: Network devices and terminals transmit and / or receive on at least two carriers based on the third indication information.

[0212] Specifically, in the frequency domain corresponding to the first time domain range, network devices and terminals perform uplink and downlink transmissions respectively on the uplink transmission carrier and downlink transmission carrier indicated by the third indication information.

[0213] Optionally, the network device sends a fourth indication message, and the terminal receives the fourth indication message, which is used to indicate the switching of the transmission direction of some or all of the carriers in at least two carriers.

[0214] In the embodiments of this application, the specific description of the fourth indication information can be referred to the specific description of the second indication information indicating the switching of the transmission direction of some or all of the carriers in at least two carriers in the aforementioned embodiment 1, and will not be repeated here.

[0215] Optionally, at least two carriers in Embodiment 2 may correspond one-to-one with at least two carriers in Embodiment 1.

[0216] In this embodiment of the application, by using steps one and two in the above embodiment 2, the transmission direction of the carrier can be configured when the location of the frequency domain resource is not determined.

[0217] The above mainly describes the solution of the embodiments of this application from the perspective of the method. The functional units of a communication device according to this embodiment are illustrated below. It is understood that, in order to achieve the above functions, the terminal includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments disclosed herein, this embodiment can be implemented in hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this embodiment.

[0218] This application embodiment can divide the terminal and network device into functional units according to the above method example. For example, each function can be divided into a separate functional unit, or two or more functions can be integrated into one processing unit. The integrated unit can be implemented in hardware or as a software program module. It should be noted that the unit division in this application embodiment is illustrative and only represents a logical functional division, while other division methods may be used in actual implementation.

[0219] refer to Figure 16 , Figure 16 The terminal 300 provided in some embodiments of this application is shown. For example... Figure 16As shown, terminal 300 may include: input / output modules (including audio input / output module 318, key input module 316, and display 320, etc., only a portion of which are shown in the figure), user interface 302, communication interface 301, one or more terminal processors 304, transmitter 306, receiver 308, coupler 310, antenna 314, and memory 312. These components can be connected via a bus or other means. Figure 16 Taking a bus connection as an example:

[0220] The communication interface 301 can be used by the terminal 300 to communicate with other communication devices, such as a base station. Specifically, the base station can be... Figure 16 The network device 400 shown. Communication interface 301 refers to the interface between the terminal processor 304 and the transceiver system (composed of transmitter 306 and receiver 308), such as the X1 interface in LTE. In specific implementations, communication interface 301 may include one or more of the following: Global System for Mobile Communication (GSM) (2G) communication interface, Wideband Code Division Multiple Access (WCDMA) (3G) communication interface, and Long Term Evolution (LTE) (4G) communication interface, or it may be a 4.5G, 5G, or future New Radio communication interface. Not limited to wireless communication interfaces, terminal 300 may also be configured with a wired communication interface 301, such as a Local Access Network (LAN) interface.

[0221] Antenna 314 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space, or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line. Coupler 310 is used to split the mobile communication signal received by antenna 314 into multiple paths and distribute them to multiple receivers 308.

[0222] The transmitter 306 can be used to transmit signals output by the terminal processor 304, and the receiver 308 can be used to receive mobile communication signals received by the antenna 314.

[0223] In some embodiments of this application, the transmitter 306 and receiver 308 can be considered as a wireless modem. In the terminal 300, there can be one or more transmitters 306 and receivers 308.

[0224] Apart from Figure 16The transmitter 306 and receiver 308 shown may be accompanied by other communication components in the terminal 300, such as a GPS module, a Bluetooth module, or a Wi-Fi module. Not limited to the wireless communication signals described above, the terminal 300 may also support other wireless communication signals, such as satellite signals, shortwave signals, etc. In addition to wireless communication, the terminal 300 may also be configured with a wired network interface (such as a LAN interface) to support wired communication.

[0225] The input / output module is used to realize the interaction between the terminal 300 and the user / external environment, and may mainly include an audio input / output module 318, a key input module 316, and a display 320. In specific implementations, the input / output module may also include a camera, a touch screen, and sensors, etc. All input / output modules communicate with the terminal processor 304 through the user interface 302.

[0226] The memory 312 is coupled to the terminal processor 304 and is used to store various software programs and / or multiple sets of instructions. In specific implementations, the memory 312 may include high-speed random access memory and may also include non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. The memory 312 may store an operating system (hereinafter referred to as the system), such as embedded operating systems like Android, iOS, Windows, or Linux. The memory 312 may also store a network communication program, which can be used to communicate with one or more additional devices, one or more terminals, or one or more network devices. The memory 312 may also store a user interface program, which can realistically display the content of the application through a graphical user interface and receive user control operations on the application through input controls such as menus, dialog boxes, and buttons.

[0227] In some embodiments of this application, the memory 312 may be used to store the implementation program of the communication method provided in one or more embodiments of this application on the terminal 300 side. For the implementation of the communication provided in one or more embodiments of this application, please refer to the above embodiments.

[0228] The terminal processor 304 can be used to read and execute computer-readable instructions. Specifically, the terminal processor 304 can be used to call a program stored in the memory 312, such as the implementation program of the communication method provided in one or more embodiments of this application on the terminal 300 side, and execute the instructions contained in the program.

[0229] The terminal processor 304 can be a modem processor, a module that implements the main functions of wireless communication standards such as 3GPP and ETSI. The modem can be a standalone chip or integrated with other chips or circuits to form a system-on-a-chip (SoC) or integrated circuit. These chips or integrated circuits can be used in all devices that implement wireless communication functions, including mobile phones, computers, laptops, tablets, routers, wearable devices, automobiles, and home appliances. It should be noted that in different implementations, the terminal processor 304 can be a standalone chip coupled to off-chip memory, meaning it does not contain internal memory; or the terminal processor 304 can be coupled to on-chip memory and integrated into the chip, meaning it contains internal memory.

[0230] Understandable, terminal 300 can be Figure 1 The terminal 300 in the wireless communication system 100 shown can be implemented as a mobile device, mobile station, mobile unit, wireless unit, remote unit, user agent, mobile client, etc.

[0231] It needs to be explained that, Figure 16 The terminal 300 shown is merely one implementation of this application. In practical applications, the terminal 300 may include more or fewer components, which is not limited here.

[0232] refer to Figure 17 , Figure 17 The network device 400 provided in some embodiments of this application is illustrated. For example... Figure 17 As shown, network device 400 may include: a communication interface 403, one or more network device processors 401, a transmitter 407, a receiver 409, a coupler 411, an antenna 413, and a memory 405. These components can be connected via a bus or other means. Figure 17 Taking a bus connection as an example:

[0233] The communication interface 403 can be used by the network device 400 to communicate with other communication devices, such as terminals or other base stations. Specifically, the terminal can be... Figure 16The terminal 300 shown is an example. Communication interface 403 refers to the interface between the network device processor 401 and the transceiver system (composed of transmitter 407 and receiver 409), such as the S1 interface in LTE. In specific implementations, communication interface 403 may include one or more of the following: Global System for Mobile Communications (GSM) (2G) communication interface, Wideband Code Division Multiple Access (WCDMA) (3G) communication interface, and Long Term Evolution (LTE) (4G) communication interface, or it may be a 4.5G, 5G, or future New Radio communication interface. Not limited to wireless communication interfaces, network device 400 can also be configured with a wired communication interface 403 to support wired communication; for example, the backhaul link between one network device 400 and other network devices 400 can be a wired communication connection.

[0234] Antenna 413 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space, or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line. Coupler 411 can be used to split a mobile signal into multiple paths and distribute them to multiple receivers 409.

[0235] The transmitter 407 can be used to transmit signals output by the network device processor 401, and the receiver 409 can be used to receive mobile communication signals received by the antenna 413.

[0236] In some embodiments of this application, transmitter 407 and receiver 409 can be considered as a wireless modem. In network device 400, the number of transmitter 407 and receiver 409 can be one or more.

[0237] Memory 405 is coupled to network device processor 401 and is used to store various software programs and / or multiple sets of instructions. In specific implementations, memory 405 may include high-speed random access memory and may also include non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. Memory 405 may store an operating system (hereinafter referred to as the system), such as uCOS, VxWorks, RTLinux, or other embedded operating systems. Memory 405 may also store network communication programs that can be used to communicate with one or more additional devices, one or more terminals, or one or more network devices.

[0238] The network device processor 401 can be used for wireless channel management, establishing and dismantling call and communication links, and controlling handover of terminals within the control area. Specifically, the network device processor 401 may include: an Administration / Communication Module (AM / CM) (for central voice and information switching), a Basic Module (BM) (for call processing, signaling processing, radio resource management, radio link management, and circuit maintenance), a Transcoder and SubMultiplexer (TCSM) (for multiplexing, demultiplexing, and code conversion functions), etc.

[0239] In this application, the network device processor 401 can be used to read and execute computer-readable instructions. Specifically, the network device processor 401 can be used to call a program stored in the memory 405, such as the implementation program of the communication method provided in one or more embodiments of this application on the network device 400 side, and execute the instructions contained in the program.

[0240] The network device processor 401 can be a modem processor, a module that implements the main functions of wireless communication standards such as 3GPP and ETSI. The modem can be a standalone chip or integrated with other chips or circuits to form a system-on-a-chip (SoC) or integrated circuit. These chips or integrated circuits can be applied to all network-side devices that implement wireless communication functions. For example, in LTE networks, it is called an evolved Node B (eNB or eNodeB); in third-generation (3G) networks, it is called a Node B; and in 5G networks, it is called a 5G base station (NRNodeB, gNB). It should be noted that in different implementations, the network device processor 401 can be a standalone chip coupled to off-chip memory, meaning it does not contain internal memory; or the network device processor 401 can be coupled to on-chip memory and integrated into the chip, meaning it contains internal memory.

[0241] Understandable, network devices can be 400. Figure 1 The network device 400 in the illustrated wireless communication system 100 can be implemented as a base transceiver station, a wireless transceiver, a basic service set (BSS), an extended service set (ESS), a NodeB, an eNodeB, etc. The network device 400 can be implemented as several different types of base stations, such as macro base stations, micro base stations, etc. The network device 400 can apply different wireless technologies, such as cellular wireless access technology or WLAN wireless access technology.

[0242] It needs to be explained that, Figure 17 The network device 400 shown is merely one implementation of this application. In practical applications, the network device 400 may include more or fewer components, which is not limited here. The network device 400 is used to perform the actions performed by the network device in the above embodiments.

[0243] When using integrated units, Figure 18 A communication device 1800 is shown, which includes a communication unit 1801, and optionally a processing unit 1802 and a storage unit 1803.

[0244] Optionally, the communication unit 1801 can be a module unit for sending and receiving signals, information, etc., without specific limitations.

[0245] Optionally, the storage unit 1803 is used to store computer program code or instructions executed by the communication device 1800. The storage unit 1803 may be a memory.

[0246] Optionally, the communication device 1800 may be a chip or a chip module.

[0247] It should be noted that the processing unit 1802 can be a processor or controller, such as a baseband processor, baseband chip, central processing unit (CPU), general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It can implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this embodiment. The processing unit 1802 can also be a combination that implements computing functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0248] For example, if the communication device 1800 is a terminal, then the communication unit 1801 can perform the following actions:

[0249] Receive first indication information, the first indication information being used to indicate the transmission direction corresponding to at least two carriers within a first time domain range, wherein at least one of the at least two carriers has a different transmission direction from the other carriers within the at least two carriers, and the first time domain range includes one time unit or a plurality of consecutive time units.

[0250] Optionally, the first indication information is used to indicate the transmission direction corresponding to at least two carriers within the first time domain, specifically including: the first indication information is used to indicate the transmission direction corresponding to at least two carrier groups within the first time domain, wherein at least one carrier group in the at least two carrier groups has a different transmission direction from the other carrier groups in the at least two carrier groups, and the carrier group includes at least one carrier.

[0251] Optionally, the first time domain range includes at least one uplink time unit and at least one flexible time unit, or at least one downlink time unit and at least one of the flexible time units.

[0252] Optionally, the first indication information includes first information, which is used to indicate the location of a time unit within the first time domain range, and the first information is carried in cell-level signaling.

[0253] Optionally, the first indication information includes second information and third information. The second information is used to indicate the location of a portion of time units within the first time domain range, and the third information is used to indicate the location of another portion of time units within the first time domain range. The second information is carried in cell-level signaling, and the third information is carried in user-specific signaling and / or dynamic time slot format information. The other portion of time units is the flexible time unit that is not configured in the cell-level signaling.

[0254] Optionally, the communication unit 1801 is further configured to: receive second indication information, the second indication information being used to indicate switching the transmission direction of some or all of the at least two carriers.

[0255] Optionally, the transmission direction includes uplink, downlink, and uplink plus downlink.

[0256] For example, if the communication device 1800 is a network device, then the communication unit 1801 can perform the following actions:

[0257] Send first indication information, the first indication information being used to indicate the transmission direction corresponding to at least two carriers within a first time domain range, wherein at least one of the at least two carriers has a different transmission direction from the other carriers within the at least two carriers, and the first time domain range includes one time unit or a plurality of consecutive time units.

[0258] Optionally, the first indication information is used to indicate the transmission direction corresponding to at least two carriers within the first time domain, specifically including: the first indication information is used to indicate the transmission direction corresponding to at least two carrier groups within the first time domain, wherein at least one carrier group in the at least two carrier groups has a different transmission direction from the other carrier groups in the at least two carrier groups, and the carrier group includes at least one carrier.

[0259] Optionally, the first time domain range includes at least one uplink time unit and at least one flexible time unit, or at least one downlink time unit and at least one of the flexible time units.

[0260] Optionally, the indication information includes first information, which indicates the location of a time unit within the first time domain range, and the first information is carried in cell-level signaling.

[0261] Optionally, the first indication information includes second information and third information. The second information is used to indicate the location of a portion of time units within the first time domain range, and the third information is used to indicate the location of another portion of time units within the first time domain range. The second information is carried in cell-level signaling, and the third information is carried in user-specific signaling and / or dynamic time slot format information. The other portion of time units is a flexible time unit configured by cell-level signaling.

[0262] Optionally, the communication unit 1801 is further configured to: send second indication information, the second indication information being used to indicate switching the transmission direction of some or all of the at least two carriers.

[0263] Optionally, the transmission direction includes uplink, downlink, and uplink plus downlink.

[0264] This application also provides a computer program product comprising: a computer program (also referred to as code or instructions) that, when run, causes a computer to perform the method executed by the terminal in any of the above embodiments.

[0265] This application also provides a computer-readable storage medium storing a computer program (also referred to as code or instructions). When the computer program is run, it causes the computer to perform the method executed by the terminal in any of the foregoing embodiments.

[0266] This application also provides a chip system including at least one processor for implementing the functions involved in the methods performed by the electronic device in any of the above embodiments.

[0267] In one possible design, the chip system also includes a memory for storing program instructions and data, which may be located inside or outside the processor.

[0268] The chip system can consist of chips or include chips and other discrete components.

[0269] Optionally, the chip system may contain one or more processors. These processors can be implemented in hardware or software. When implemented in hardware, the processor can be a logic circuit, an integrated circuit, etc. When implemented in software, the processor can be a general-purpose processor, implemented by reading software code stored in memory.

[0270] Optionally, the chip system may contain one or more memories. The memory may be integrated with the processor or disposed separately from it; this application embodiment does not limit this. For example, the memory may be a non-transient processor, such as a read-only memory (ROM), which may be integrated with the processor on the same chip or disposed separately on different chips. This application embodiment does not specifically limit the type of memory or the arrangement of the memory and processor.

[0271] For example, the chip system may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a micro controller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0272] The various embodiments of this application can be combined arbitrarily to achieve different technical effects.

[0273] In the foregoing embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. This computer program product includes one or more computer instructions. When these computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk).

[0274] Those skilled in the art will understand that implementing all or part of the processes in the foregoing embodiments can be accomplished by a computer program instructing related hardware. This program can be stored in a computer-readable storage medium, and when executed, it can include the processes described in the foregoing method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as read-only memory (ROM) or random access memory (RAM), magnetic disks, or optical disks.

[0275] In summary, the above description is merely an embodiment of the technical solution of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made based on the disclosure of this application should be included within the scope of protection of this application.

Claims

1. A communication method, characterized in that, The method includes: Receive first indication information, the first indication information being used to indicate the transmission direction corresponding to at least two carriers within a first time domain range, wherein at least one of the at least two carriers has a different transmission direction from the other carriers within the at least two carriers, and the first time domain range includes one time unit or a plurality of consecutive time units.

2. The method according to claim 1, characterized in that, The first indication information is used to indicate the transmission direction corresponding to at least two carriers within a first time domain, specifically including: The first indication information is used to indicate the transmission direction corresponding to at least two carrier groups within the first time domain, wherein at least one of the at least two carrier groups has a different transmission direction from the other carrier groups in the at least two carrier groups, and the carrier group includes at least one carrier.

3. The method according to claim 1 or 2, characterized in that, The first time domain range includes at least one uplink time unit and at least one flexible time unit, or at least one downlink time unit and at least one of the flexible time units.

4. The method according to any one of claims 1-3, characterized in that, The first indication information includes first information, which is used to indicate the location of a time unit in the first time domain range, and the first information is carried in cell-level signaling.

5. The method according to any one of claims 1-3, characterized in that, The first indication information includes second information and third information. The second information is used to indicate the location of a portion of time units within the first time domain range, and the third information is used to indicate the location of another portion of time units within the first time domain range. The second information is carried in cell-level signaling, and the third information is carried in user-specific signaling and / or dynamic time slot format information. The other portion of time units is the flexible time unit that is not configured in the cell-level signaling.

6. The method according to any one of claims 1-5, characterized in that, The method further includes: Receive a second indication message, which is used to indicate the direction of transmission of some or all of the at least two carriers.

7. The method according to any one of claims 1-6, characterized in that, The transmission directions include uplink transmission direction, downlink transmission direction, and uplink plus downlink transmission direction.

8. A communication method, characterized in that, The method includes: Send first indication information, the first indication information being used to indicate the transmission direction corresponding to at least two carriers within a first time domain range, wherein at least one of the at least two carriers has a different transmission direction from the other carriers within the at least two carriers, and the first time domain range includes one time unit or a plurality of consecutive time units.

9. The method according to claim 8, characterized in that, The first indication information is used to indicate the transmission direction corresponding to at least two carriers within a first time domain, specifically including: The first indication information is used to indicate the transmission direction corresponding to at least two carrier groups within the first time domain, wherein at least one of the at least two carrier groups has a different transmission direction from the other carrier groups in the at least two carrier groups, and the carrier group includes at least one carrier.

10. The method according to claim 8 or 9, characterized in that, The first time domain range includes at least one uplink time unit and at least one flexible time unit, or at least one downlink time unit and at least one of the flexible time units.

11. The method according to any one of claims 8-10, characterized in that, The indication information includes first information, which is used to indicate the position of a time unit in the first time domain range, and the first information is carried in cell-level signaling.

12. The method according to any one of claims 8-10, characterized in that, The first indication information includes second information and third information. The second information is used to indicate the location of a portion of time units within the first time domain range, and the third information is used to indicate the location of another portion of time units within the first time domain range. The second information is carried in cell-level signaling, and the third information is carried in user-specific signaling and / or dynamic time slot format information. The other portion of time units is a flexible time unit configured by cell-level signaling.

13. The method according to any one of claims 8-12, characterized in that, The method further includes: Send a second indication message, which is used to indicate the switching of the transmission direction of some or all of the at least two carriers.

14. The method according to any one of claims 8-13, characterized in that, The transmission directions include uplink transmission direction, downlink transmission direction, and uplink plus downlink transmission direction.

15. A terminal, characterized in that, The terminal includes one or more memories, one or more processors, and one or more wireless modules; the wireless modules are used to receive signals sent by one or more network devices, or to send signals to one or more network devices; the memories are coupled to the one or more processors; the memories are used to store computer program code, the computer program code including computer instructions; the one or more processors call the computer instructions to cause the terminal to perform the method as described in any one of claims 1-7.

16. A network device, characterized in that, The network device includes one or more memories, one or more processors, and one or more wireless modules; the wireless modules are used to receive signals sent by one or more terminals, or to send signals to one or more of the terminals; the memories are coupled to the one or more processors; the memories are used to store computer program code, the computer program code including computer instructions; the one or more processors invoke the computer instructions to cause the network device to perform the method as described in any one of claims 8-14.

17. A communication system, the communication system comprising a terminal and network equipment, characterized in that, The terminal performs the method steps as described in any one of claims 1-7, or the network device performs the method steps as described in any one of claims 8-14.

18. A computer-readable storage medium comprising instructions, characterized in that, When the instructions are executed on a computer, the computer causes the computer to perform the method as described in any one of claims 1-14.

19. A communication device, characterized in that, include: A communication unit, the communication unit being configured to perform the method as described in any one of claims 1-14.

20. A computer program product, comprising instructions, characterized in that, When the instructions are executed on a computer, the computer causes the computer to perform the method as described in any one of claims 1-14.

21. A chip, characterized in that, The chip stores a computer program, which, when executed by the chip, implements the method as described in any one of claims 1-14.

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