Method for duplex operation and user equipment using the same

Abstract

To provide a method and an apparatus for performing duplex operation of an uplink (UL) transmission and a downlink (DL) reception in user equipment (UE).SOLUTION: A method of duplex operation used by UE, in a wireless communication system that may be more stable and efficient, includes receiving at least one indication indicating at least one of a DL reception and a UL transmission, and performing the DL reception through a first resource or the UL transmission through a second resource according to a rule.SELECTED DRAWING: Figure 6B

Description

Technical Field

[0001] The present invention relates to a duplex operation method and a user equipment using the same.

Background Art

[0002] The 3GPP (Third Generation Partnership Project) is developing a 5G wireless access technology known as New Radio (NR). 5G NR aims to support various usage scenarios to meet new requirements related to latency, reliability, security, scalability (such as Internet of Things (IoT)), and other requirements. 5G NR includes services related to enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC). However, in 5G NR technology, there is a need to further improve multi-access. These improvements may also be applicable to other multi-access technologies and telecommunication standards using these technologies. For example, conventional duplex operations are no longer able to meet the needs of 5G NR.

[0003] Conventional duplex operations include time-division duplex (TDD) and frequency-division duplex (FDD). Specifically, TDD uses the same frequency band for both data transmission and reception, but not simultaneously. In TDD, data transmission and reception occur in non-overlapping time resources, so only the transmitter or receiver is always active. On the other hand, FDD uses two separate frequency bands for data transmission and reception. In FDD, the transmit frequency and the receive frequency are separated by a defined frequency gap, which enables simultaneous transmission and reception without interference. TDD is more flexible, but when allocating a limited period to the uplink (UL) in TDD, coverage decreases and latency increases. That is, in TDD, since the UL resource requires the wireless device to wait for the UL transmission to be sent, there may be a need for a higher latency, especially for the UL. Furthermore, in both TDD and FDD, spectrum resources are significantly wasted. That is, it is worth considering the possibility of enabling the coexistence of downlink (DL) transmission and UL transmission (also called full duplex).

[0004] Therefore, in 5G NR, sub-band full duplex (SBFD) has been introduced for the purpose of solving the uplink latency problem. In SBFD, by using a TDD carrier divided into sub-bands, simultaneous transmission and reception in the same slot are enabled. Note that SBFD is different from conventional FDD. In conventional FDD, a given carrier and / or bandwidth part (BWP) is usually completely dedicated to either uplink or downlink communication. In SBFD, a part of the time-frequency resources of a given carrier is UL-dedicated, and a part of the time-frequency resources of the same carrier supports the DL. However, in the current 5G NR system specifications, a method (e.g., SBFD) for dealing with the time-domain conflict between the UL and DL operations of the UE when applying full duplex has not yet been specifically specified. However, such a specification is necessary to reduce the UL latency.

Summary of the Invention

Problems to be Solved by the Invention

[0005] When applying full duplex (e.g., SBFD) in a future wireless communication system, it is necessary to address the time domain conflict between the UL and DL operations of the UE. Therefore, the present invention relates to a method of duplex operation and a user equipment using the same.

Means for Solving the Problem

[0006] In one exemplary embodiment, the present invention relates to a method of duplex operation used by a UE, the method including, but not limited to, receiving at least one instruction for instructing at least one of DL reception and UL transmission, and performing DL reception via a first resource or performing UL transmission via a second resource according to a rule.

[0007] In one of the exemplary embodiments, the present invention is directed to a UE including a transceiver and a processor coupled to the transceiver, configured to receive at least one instruction for instructing at least one of DL reception and UL transmission, and perform DL reception via a first resource or perform UL transmission via a second resource according to a rule, but not limited thereto.

Advantages of the Invention

[0008] Based on the above, when the DL reception and the UL transmission overlap in the time domain, the UE can determine whether to perform DL reception via the first resource or UL transmission via the second resource. Therefore, the communication system can be more stable and efficient.

[0009] However, it should be understood that this summary does not include all aspects and embodiments of the present invention, and thus does not mean to limit or restrict in any way. Also, the present invention includes improvements and modifications obvious to those skilled in the art.

Brief Description of the Drawings

[0010] The accompanying drawings are included to provide a further understanding of the present invention, are incorporated herein, and constitute a part of this specification. The drawings illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

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DETAILED DESCRIPTION OF THE INVENTION

[0011] It should be understood that both the foregoing general description and the following detailed description are exemplary and are intended to provide further explanation of the claimed invention. Whenever possible, the same or similar reference numerals are used in the drawings and the description to refer to the same or similar components.

[0012] Some aspects of a wireless communication system are presented with reference to various apparatuses and methods. These apparatuses and methods are described in the following detailed description and are illustrated in the accompanying drawings by various elements such as blocks, components, circuits, processes, algorithms, etc. These elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the particular application and design constraints imposed on the overall system. Thus, in one or more exemplary embodiments, the functions described in the present invention can be implemented in hardware, software, or any combination thereof. When implemented in software, the functions can be stored or encoded as one or more instructions or codes on a computer-readable medium.

[0013] FIG. 1 is a schematic diagram showing full-duplex communication on the BS side. Referring to FIG. 1, "D" represents the downlink (DL), and "U" represents the uplink (UL). When the BS supports sub-band non-overlapping full duplex, some slots or symbols may be divided into at least two sub-bands, each responsible for DL transmission and UL reception, so that the BS can perform simultaneous transmission and reception in different non-overlapping sub-bands at the same time. That is, full-duplex communication can be realized in unpaired spectra where transmissions in different directions occur in different sub-bands with different carrier bandwidths.

[0014] FIG. 2 is a schematic diagram showing a slot configuration. Referring to FIG. 2, the slot format may include DL symbol 201, flexible symbol 202, and UL symbol 203. The following instructions are applicable to each serving cell to indicate the UE about the transmission direction in one slot: tdd-UL-DL-ConfigurationCommon (carried by a Radio Resource Control (RRC) message), tdd-UL-DL-ConfigurationDedicated (carried by an RRC message), and Slot Format Indicator (SFI)-Wireless Network Temporary Identifier (RNTI) (carried by an RRC message and used to receive downlink control information (DCI) such as DCI format 2_0). That is, the slot format may be indicated to the UE according to the above instructions.

[0015] FIG. 3 is a schematic diagram showing dynamic scheduling of DL reception and UL transmission in different flexible resources. Referring to FIG. 3, in response to the UE detecting a DCI format indicating to the UE that the UE is to perform DL reception on flexible resource 301, the UE can perform DL reception (i.e., PDSCH) on flexible resource 301. Further, in response to the UE detecting a DCI format indicating to the UE that the UE is to perform UL transmission on flexible resource 302, the UE can perform UL transmission (i.e., PUSCH) on flexible resource 302. Note that when there is one flexible resource, the UE cannot (e.g., cannot be expected to) perform reception of a DL signal and transmission of a UL signal simultaneously. That is, the UE cannot perform UL transmission and DL reception simultaneously on the same flexible resource.

[0016] FIG. 4A is a schematic diagram showing reception restrictions of flexible resources in the DL portion when DCI format 2_0 is detected. Referring to FIG. 4A, when the UE detects DCI format 2_0 configured by a higher layer with a flexible resource and indicating the flexible resource as a flexible resource, DL reception on such a flexible resource may be restricted as the conditions shown in FIG. 4A. The UE may not receive a physical downlink control channel (PDCCH) on the flexible resource. When the UE is configured by a higher layer to receive a physical downlink shared channel (PDSCH) or a channel state information reference signal (CSI-RS) on the flexible resource, the UE may not receive the PDSCH or CSI-RS on the flexible resource. When the UE is configured by a higher layer to receive a DL positioning signal (PRS) on the flexible resource, the UE can receive the DL PRS on the flexible resource.

[0017] FIG. 4B is a schematic diagram showing transmission restrictions of flexible resources in the UL part when DCI format 2_0 is detected. Referring to FIG. 4B, when a UE detects DCI format 2_0 configured with flexible resources by upper layer settings and indicating the flexible resources as flexible resources, UL transmission on such flexible resources may be restricted as the following conditions shown in FIG. 4B. When the UE is configured by the upper layer to transmit a sounding reference signal (SRS) on flexible resources, the UE may not transmit the SRS on the flexible resources. When the UE is configured by the upper layer to transmit a physical uplink control channel (PUCCH) on flexible resources, the UE may not transmit the PUCCH on the flexible resources. When the UE is configured by the upper layer to transmit a physical uplink shared channel (PUSCH) on flexible resources, the UE may not transmit the PUSCH on the flexible resources. When the UE is configured by the upper layer to transmit a physical random access channel (PRACH) on flexible resources, the UE may not transmit the PRACH on the flexible resources.

[0018] Figure 4C is a schematic diagram showing transmission and reception when DCI format 2_0 is not detected. Referring to Figure 4C, when the UE is configured with flexible resources by upper layer settings but does not detect DCI format 2_0 indicating the flexible resources as flexible resources, UL transmission and DL reception on such flexible resources can be subject to the following conditions shown in Figure 4C. The UE can receive PDCCH on the flexible resources. If the UE is configured by the upper layer to receive DL PRS on the flexible resources, the UE can receive DL PRS on the flexible resources. If the UE is configured by the upper layer to transmit SRS on the flexible resources, the UE can transmit SRS on the flexible resources. If the UE is configured by the upper layer to transmit PUCCH, the UE can transmit PUCCH on the flexible resources. If the UE is configured by the upper layer to transmit PUSCH, the UE can transmit PUSCH on the flexible resources. If the UE is configured by the upper layer to transmit PRACH on the flexible resources, the UE can transmit PRACH on the flexible resources.

[0019] In future wireless communication systems, such as 5G NR systems, bandwidth parts (BWPs) may be used to allocate bandwidth to UEs that have difficulty supporting broadband in wireless communication systems using broadband. In future wireless communication systems, different numerologies (e.g., sub-carrier spacing (SCS), length of cyclic prefix (CP), etc.) may be supported for the same carrier. A BWP may include a set of contiguous physical resource blocks (PRBs) in a future wireless communication system. Further, BWP switching procedures are used to activate an inactive BWP and deactivate an active BWP at a time.

[0020] Figure 5A is a schematic diagram showing BWP switching for DL reception. Referring to Figure 5A, the UE can receive DCI 51, which is DCI format 0_1 in the first BWP, and DCI 51 can instruct the UE to receive PDSCH 53 in the second BWP. Therefore, the UE can perform BWP switching from the first BWP to the second BWP to receive PDSCH 53 in the second BWP. In some cases, after receiving PDSCH 53, the UE can stay in the second BWP and transmit HARQ feedback on PUCCH 54 corresponding to PDSCH 53 in the second BWP.

[0021] Figure 5B is a schematic diagram showing BWP switching for UL transmission. Referring to Figure 5B, the UE can receive DCI 52, which is DCI format 1_1 in the first BWP, and DCI 52 can instruct the UE to transmit PUSCH 55 in the second BWP. Therefore, the UE can perform BWP switching from the first BWP to the second BWP to transmit PUSCH 55 in the second BWP. In some cases, after PUSCH transmission, the UE may stay in the second BWP.

[0022] Figure 6A is a schematic diagram of a wireless communication system according to an embodiment of the present invention. Referring to Figure 6A, the wireless communication system 10 includes at least, but is not limited to, the UE 100 and the base station 200. In other examples, the wireless communication system 10 may be or include a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network. In some examples, the wireless communication system 10 can support high-bandwidth communication, ultra-reliable communication, low-latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0023] The base station 200 and the UE 100 can perform wireless communication via one or more communication links. The base station 200 can provide a coverage area in which the UE 100 and the base station 200 can establish one or more communication links. The coverage area may be an example of a geographical area in which the base station 200 and the UE 100 can support signal communication according to one or more wireless access technologies. The base station 200 may be a macro base station, a pico base station, a femto base station, etc., but is not limited in the present invention.

[0024] The base station 200 can support the operation of a cell. Each cell may be operable to provide service to at least one UE 100 within its wireless coverage. Specifically, each cell (often referred to as a serving cell) can provide a service that provides service to one or more UEs 100 within its wireless range (for example, each cell schedules to transmit downlink (DL) and optionally uplink (UL) resources to at least one UE within the wireless coverage of DL and optionally UL packet transmission). The base station 200 can communicate with one or more UEs 100 in a wireless communication system via a plurality of cells.

[0025] The base station 200 may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., 4G), a gNB (e.g., 5G), a Node - B, an Advanced BS (ABS), a Transmission and Reception Point (TRP), an Unauthorized TRP, a Base Transceiver System (BTS), an access point, a Home BS, a relay station, a scatterer, a repeater, an intermediate node, an intermediate, a satellite communication BS, etc.

[0026] UE100 can communicate with a network (e.g., a core network (CN), an evolved packet core (EPC) network, an evolved universal terrestrial radio access network (E-UTRAN), a 5G core (5GC), or the Internet) via a RAN established by one or more base stations 200. The wireless communication between the base station 200 and the UE100 may be described as using an air interface. The transmission from the base station 200 to the UE100 via the air interface is also called a downlink (DL) transmission. The transmission from the UE100 to the base station 200 is also called an uplink (UL) transmission.

[0027] UE100 may be, for example, a mobile station, an advanced mobile station (AMS), a server, a client, a desktop computer, a laptop computer, a network computer, a workstation, a personal digital assistant (PDA), a tablet personal computer (PC), a scanner, a telephone device, a pager, a camera, a television, a handheld video game device, a music device, a wireless sensor, etc. In some applications, the UE may be a fixed computer device operating in a mobile environment such as a bus, a train, an airplane, a boat, an automobile, etc. Also, UE100 may be regarded as, for example, a machine type communication (MTC) or an evolved or advanced machine type communication (eMTC) UE. The MTC UE and / or the eMTC UE may include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags that can communicate with a base station, another device (e.g., a remote device), or other entities.

[0028] In some embodiments, in a wireless communication system 10 that uses orthogonal frequency division multiplexing (OFDM), a duplexing scheme often called sub-band full duplex (SBFD) may be used. In some embodiments, while the UE100 remains in half-duplex operation, the BS200 can operate in full duplex (e.g., SBFD).

[0029] To facilitate an understanding of the technical solutions of the embodiments of the present invention, the technical concepts related to the embodiments of the present invention are described below.

[0030] FIG. 6B is a flowchart of a method for duplex operation according to an embodiment of the present invention. Referring to FIG. 6B, the method of this embodiment may be adapted to the UE 100 under the wireless communication system 10 of FIG. 6A. However, the steps of this method can be adjusted according to actual needs and are thus not limited below.

[0031] In S610, the UE 100 can receive at least one instruction that instructs at least one of DL reception and UL transmission. In some embodiments, DL reception and UL transmission overlap in the time domain. Specifically, the BS 200 can operate in sub-band non-overlapping full duplex (e.g., SBFD) and execute DL and UL transmissions at the same time, so the UE 100 can be scheduled to perform DL reception associated with a first resource and UL transmission associated with a second resource, where the first resource and the second resource may overlap in the time domain.

[0032] In some embodiments, the at least one instruction includes a first instruction that instructs DL reception, a second instruction that instructs UL transmission, or a combination thereof. In some embodiments, the UE 100 can receive a first instruction that instructs DL reception and a second instruction that instructs UL transmission, and the DL reception instructed by the first instruction and the UL transmission instructed by the second instruction overlap in the time domain. Further, the at least one instruction may include a higher layer setting, dynamically scheduled DCI, or a combination thereof. The higher layer setting may include a wireless resource control (RRC) configuration. In some embodiments, the first instruction that instructs DL reception is a higher layer setting or dynamically scheduled DCI. In some embodiments, the second instruction that instructs UL transmission is a higher layer setting or dynamically scheduled DCI.

[0033] In S620, the UE 100 can perform DL reception via a first resource or UL transmission via a second resource according to rules. In some embodiments, the first resource and the second resource are frequency division multiplexed (FDM) in a frequency range, and the first resource and the second resource can correspond to one or more same slots or one or more same symbols, but the first resource and the second resource correspond to different frequency ranges. The frequency ranges of the first resource and the second resource can be in the range of a BWP, a serving cell, or a resource block (RB). The BS 200 can operate in sub-band full duplex and can perform DL transmission and UL transmission at the same time, so the UE 100 can receive an indication indicating that DL reception and UL transmission conflict with each other in the time domain. In some embodiments, in response to receiving an indication indicating DL reception and UL transmission that conflict with each other in the time domain, the UE 100 can perform either DL reception or UL transmission according to rules. These rules define different types of priorities for DL reception and UL transmission. Each time a collision between DL reception and UL transmission occurs in the time domain, the UE 100 can process the collision according to rules.

[0034] In some embodiments, the first resource is a DL resource and the second resource is a flexible resource. In some embodiments, the first resource is a flexible resource and the second resource is a UL resource. In some embodiments, the first resource is a flexible resource and the second resource is another flexible resource. In some embodiments, the first resource is a DL resource and the second resource is a UL resource.

[0035] Figures 7A and 7B are schematic diagrams showing UL delay reduction according to an exemplary embodiment of the present invention. In the embodiments of Figures 7A and 7B, the first resource may be a DL resource, and the second resource may be a flexible resource. Referring to Figure 7A, UE 100 can receive DCI and the PDSCH indicated by the DCI on DL resource 701. Thereafter, UE 100 can perform HARQ transmission by PUCCH on flexible resource 702. Since flexible resource 702 is configured based on the full duplex operation of BS 200, the HARQ feedback delay can be reduced. Referring to Figure 7B, UE 100 can receive DCI for scheduling UL transmission. Thereafter, UE 100 can transmit UL data by PUSCH on flexible resource 704 and can perform a PUSCH repeat on flexible resource 705. That is, since flexible resources 704 and 705 are configured based on the full duplex operation of BS 200, a PUSCH repeat can be provided to enhance UL coverage.

[0036] In some embodiments, if DL reception is not configured on the first resource, UE 100 can perform UL transmission via the second resource without performing DL reception via the first resource. Specifically, in some embodiments, if DL reception on the first resource is not configured by upper layer configuration or DCI, UE 100 can transmit PUSCH, PUCCH, PRACH, or SRS, such as DCI format, RAR UL grant, fallback RAR UL grant, access RAR, etc. on the second resource in response to receiving a corresponding indication. Alternatively, in some embodiments, if DL reception on the first resource is not configured by upper layer configuration or DCI, UE 100 may transmit a UL signal configured by upper layer configuration.

[0037] FIG. 8A is a schematic diagram showing execution of DL reception or UL transmission without a DL configuration according to an exemplary embodiment of the present invention. Referring to FIG. 8A, in response to the fact that DL reception is not scheduled in a first resource 801 by any upper layer setting or any DCI, the UE 100 can execute UL transmission indicated by DCI within a second resource 802. That is, when the UE 100 does not perform DL reception in the first resource 801, the UE 100 can execute UL transmission dynamically scheduled in the second resource 802. In FIG. 8A, the first resource 801 is a DL resource and the second resource 802 is a flexible resource. However, in other embodiments, the second resource 802 carrying dynamically scheduled UL transmission may be a UL resource. In other embodiments, the first resource 801 in which DL reception is not configured may be a flexible resource.

[0038] FIG. 8B is a schematic diagram showing execution of DL reception or UL transmission without a DL configuration according to an exemplary embodiment of the present invention. Referring to FIG. 8B, in response to the fact that DL reception is not scheduled in a first resource 803 by any upper layer setting or any DCI, the UE 100 can execute UL transmission indicated by an upper layer setting within a second resource 804. That is, when the UE 100 does not perform DL reception in the first resource 803, the UE 100 can execute UL transmission of the upper layer setting in the second resource 804. In FIG. 8B, the first resource 803 is a DL resource and the second resource 804 is a flexible resource. However, in other embodiments, the second resource 804 carrying upper layer configured UL transmission may be a UL resource. In other embodiments, the first resource 803 in which DL reception is not configured may be a flexible resource.

[0039] In some embodiments, UE100 can receive a first indication instructing DL reception on a first resource and a second indication instructing UL transmission on a second resource, and DL reception and UL transmission compete with each other in the time domain. When the DL reception is SSB reception, UE100 may perform DL reception via the first resource without performing UL transmission via the second resource. Specifically, even if UL transmission in the second resource is indicated by upper layer configuration or DCI, when DL reception in the first resource is SSB reception, it is selected to perform DL reception.

[0040] FIG. 9A is a schematic diagram showing performing DL reception or UL transmission when DL reception is SSB reception according to an embodiment of the present invention. Referring to FIG. 9A, when UE100 receives a first indication instructing SSB reception scheduled on a first resource 901, in response to at least one symbol of the SSB and UL transmission overlapping in the time domain, UE100 performs SSB reception on the first resource 901 but does not perform UL transmission on a second resource 902 indicated by DCI (for example, unexpected). That is, when at least one symbol of the SSB and UL transmission overlaps in the time domain, SSB reception is performed on the first resource 901, but dynamic scheduled UL transmission is not performed on the second resource 902. In FIG. 9A, the first resource 901 is a DL resource and the second resource 902 is a flexible resource. However, in other embodiments, the first resource 901 carrying the SSB may be a flexible resource. In other embodiments, the second resource 902 carrying dynamic scheduled UL transmission may be a UL resource.

[0041] FIG. 9B is a schematic diagram showing the execution of DL reception or UL transmission when DL reception according to an embodiment of the present invention is SSB reception. Referring to FIG. 9B, UE 100 receives a first indication instructing SSB reception scheduled in a first resource 903, and in response to at least one symbol of the SSB and UL transmission overlapping in the time domain, UE 100 can receive the SSB in the first resource 903 but not perform (e.g., not expect) UL transmission in a second resource 904 indicated by upper layer configuration. That is, when at least one symbol of the SSB and UL transmission overlaps in the time domain, SSB reception is performed in the first resource 901, but upper layer scheduled UL transmission in the second resource 902 is not performed. In FIG. 9B, the first resource 903 is a DL resource and the second resource 904 is a flexible resource. However, in other embodiments, the first resource 903 carrying the SSB may be a flexible resource. In other embodiments, the second resource 904 carrying upper layer scheduled UL transmission may be a UL resource.

[0042] In some embodiments, UE 100 can receive a first indication instructing DL reception in a first resource and a second indication instructing UL transmission in a second resource, and the DL reception and UL transmission compete with each other in the time domain. When the DL reception is CORESET reception associated with a first group of search spaces (SSs) and the second indication is dynamically scheduled DCI, UE 100 can perform UL transmission via the second resource without performing DL reception via the first resource. The first group of SSs is composed of a type 1 common search space (CSS) having a dedicated RRC configuration, a type 3 CSS, or a UE-specific SS. CORESET reception associated with the first group of search spaces in the first resource can be indicated by upper layer configuration. Specifically, CORESET reception and UL transmission can overlap in the time domain and UL transmission can be selected to be performed.

[0043] FIG. 10A is a schematic diagram showing DL reception or UL transmission when DL reception according to an embodiment of the present invention is CORESET reception. Referring to FIG. 10A, CORESET reception associated with the first group of SSs in the first resource 1001 is indicated by a first indication which is a higher layer configuration. When UE 100 receives a second indication instructing UL transmission in the second resource 1002 and at least one symbol of CORESET reception and UL transmission overlaps in the time domain, UE 100 may perform UL transmission in the second resource but not receive (e.g., not expect) the CORESET associated with the first group of search spaces. That is, when CORESET reception and UL transmission overlap in the time domain, CORESET reception in the first resource 1001 is not performed, and dynamic scheduled UL transmission in the second resource 1002 is performed. In FIG. 10A, the first resource 1001 is a DL resource, and the second resource 1002 is a flexible resource. However, in other embodiments, the first resource 1001 carrying the CORESET may be a flexible resource. In other embodiments, the second resource 1002 carrying dynamic scheduled UL transmission may be a UL resource.

[0044] In some embodiments, UE 100 may receive a first indication instructing DL reception in the first resource and a second indication instructing UL transmission in the second resource, and DL reception and UL transmission compete with each other in the time domain. When DL reception is CORESET reception associated with the second group of search spaces and the second indication is dynamically scheduled DCI, UE 100 may perform DL reception via the first resource without performing UL transmission via the second resource. The second group of SSs includes type 1 CSS, type 0 CSS, type 0A CSS, or type 2 CSS without dedicated RRC configuration. CORESET reception associated with the second group of search spaces in the first resource can be indicated by higher layer configuration.

[0045] Figure 10B is a schematic diagram showing the execution of DL reception or UL transmission when DL reception according to an embodiment of the present invention is CORESET reception. Referring to Figure 10B, the CORESET reception associated with the second group of SSs within the first resource 1003 is indicated by a first indication which is a higher layer setting. When the UE 100 receives a second indication instructing UL transmission in the second resource 1004 and at least one symbol of CORESET reception and UL transmission overlaps in the time domain, the UE 100 can execute the CORESET reception associated with the second indication of SS in the first resource 1003 and not execute (e.g., not expect) UL transmission in the second resource 1004. That is, when CORESET reception and UL transmission overlap in the time domain, CORESET reception in the first resource 1003 is executed, but dynamic scheduling UL transmission in the second resource 1004 is not executed. In Figure 10B, the first resource 1003 is a DL resource and the second resource 1004 is a flexible resource. However, in other embodiments, the first resource 1003 carrying the CORESET may be a flexible resource. In other embodiments, the second resource 1004 carrying the dynamic schedule UL transmission may be a UL resource.

[0046] In some embodiments, the UE 100 can receive a first indication instructing DL reception in a first resource and a second indication instructing UL transmission in a second resource, and the DL reception and UL transmission compete with each other in the time domain. When the first indication is a higher layer setting and the second indication is a dynamic schedule DCI, the UE 100 may execute UL transmission via the second resource without executing DL reception via the first resource.

[0047] FIG. 11 is a schematic diagram showing execution of DL reception or UL transmission when DL reception according to an embodiment of the present invention is configured by a higher layer. Referring to FIG. 11, DL reception at the first resource 1101 is indicated by a first instruction which is a higher layer setting, and UL transmission at the second resource 1102 is indicated by a second instruction which is dynamic scheduling DCI. In response to at least one symbol of DL reception and UL transmission overlapping in the time domain, the UE 100 can execute UL transmission at the second resource 1102 and not execute (for example, not expect) DL reception at the first resource 1101. That is, when DL reception and UL transmission overlap in the time domain, the higher layer scheduled DL reception at the first resource 1101 is not executed, and the dynamically scheduled UL transmission at the second resource 1102 is executed. In FIG. 11, the first resource 1101 is a DL resource, and the second resource 1102 is a flexible resource. However, in other embodiments, the first resource 1101 carrying the higher layer scheduled DL reception may be a flexible resource. In other embodiments, the second resource 1102 carrying the dynamically scheduled UL transmission may be a UL resource.

[0048] In some embodiments, the UE 100 can receive a first instruction instructing DL reception at a first resource and a second instruction instructing UL transmission at a second resource, and DL reception and UL transmission compete with each other in the time domain. When the first instruction is dynamic scheduling DCI and the second instruction is a higher layer setting, the UE 100 may execute DL reception via the first resource without executing UL transmission via the second resource.

[0049] FIG. 12 is a schematic diagram showing execution of DL reception or UL transmission when DL reception according to an embodiment of the present invention is dynamic DL reception. Referring to FIG. 12, DL reception in the first resource 1201 is indicated by a first indication which is dynamically scheduled DCI, and UL transmission in the second resource 1202 is indicated by a second indication which is a higher layer setting. In response to at least one symbol of DL reception and UL transmission overlapping in the time domain, the UE 100 can perform DL reception in the first resource 1201 and not perform (for example, not expect) UL transmission in the second resource 1202. That is, when DL reception and UL transmission overlap in the time domain, the higher layer scheduled UL transmission in the second resource 1202 is not performed, and the dynamically scheduled DL reception in the first resource 1201 is performed. In FIG. 12, the first resource 1201 is a DL resource, and the second resource 1202 is a flexible resource. However, in other embodiments, the first resource 1201 that carries the dynamically scheduled DL reception may be a flexible resource. In other embodiments, the second resource 1202 that carries the higher layer scheduled UL transmission may be a UL resource.

[0050] In some embodiments, UE100 can receive a first indication for instructing DL reception on a first resource and a second indication for instructing UL transmission on a second resource, and DL reception and UL transmission compete with each other in the time domain. When the first indication is a dynamically scheduled DCI and the second indication is another dynamically scheduled DCI, UE100 can execute either DL reception or UL transmission by comparing the priority parameter indicated by the first indication with other priority parameters indicated by the second indication. When at least one symbol of the DL signal and the UL signal overlaps in the time domain, if at least one symbol of the DL signal has a higher priority than the second priority, in response to the first priority being higher than the second priority, UE100 can receive DL reception at the first priority and not transmit UL transmission at the second priority (e.g., not expect to). Alternatively, when at least one symbol of the DL signal and the UL signal overlaps in the time domain, in response to the second priority being higher than the first priority, UE100 can transmit UL transmission at the second priority and not receive DL reception at the first priority (e.g., not expect to).

[0051] In some embodiments, when the first indication is a dynamically scheduled DCI, the second indication is another dynamically scheduled DCI, and at least one symbol of the DL signal and the UL signal overlaps in the time domain, if the first priority indicated by the first indication is higher than the second priority indicated by the second indication, UE100 may execute DL reception via the first resource without executing UL transmission via the second resource.

[0052] FIG. 13 is a schematic diagram showing execution of DL reception or UL transmission when DL reception according to an embodiment of the present invention is dynamic DL reception and UL transmission is dynamic UL transmission. Referring to FIG. 13, DL reception in the first resource 1301 is indicated by a first indication which is dynamically scheduled DCI, and UL transmission in the second resource 1302 is indicated by a second indication which is dynamically scheduled DCI. When at least one symbol of DL reception and UL transmission overlaps in the time domain, in response to determining that a first priority "1" indicated by the first indication is higher than a second priority "0" indicated by the second indication, the UE 100 can perform DL reception in the first resource 1301 and not perform (e.g., not expect) UL transmission in the second resource. In FIG. 13, the first resource 1301 is a DL resource and the second resource 1302 is a flexible resource. However, in other embodiments, the first resource 1301 carrying the dynamically scheduled DL reception may be a flexible resource. In other embodiments, the second resource 1302 carrying the dynamically scheduled UL transmission may be a UL resource.

[0053] In some embodiments, UE100 can receive a first indication for instructing DL reception on a first resource and a second indication for instructing UL transmission on a second resource, and DL reception and UL transmission compete with each other in the time domain. When the first indication is a dynamically scheduled DCI and the second indication is another dynamically scheduled DCI, UE100 can execute either DL reception or UL transmission by comparing the priority parameter indicated by the first indication with other priority parameters indicated by the second indication. When the first priority indicated by the first indication is the same as the second priority indicated by the second indication, UE100 may execute either DL reception or UL transmission by comparing the reception timing of the first indication with the reception timing of the second indication. When at least one symbol of DL reception and UL transmission overlaps in the time domain and the first priority of DL reception is the same as the second priority of UL reception, in response to determining that the reception timing of the first indication, which is a DCI, is later than the second indication, which is another DCI, UE100 can receive DL reception and not transmit (e.g., not expect) UL transmission. Alternatively, when at least one symbol of DL reception and UL transmission overlaps in the time domain and the first priority of DL reception is the same as the second priority of UL reception, in response to determining that the reception timing of the second indication, which is a DCI, is later than the first indication, which is another DCI, UE100 can execute UL transmission but not execute (e.g., not expect) DL reception.

[0054] In some embodiments, when the first indication is a dynamically scheduled DCI, the second indication is another dynamically scheduled DCI, and at least one symbol of the DL signal and the UL signal overlaps in the time domain, if the reception time of the first indication is later than the reception time of the second indication, UE100 may execute DL reception via the first resource without executing UL transmission via the second resource.

[0055] FIG. 14 is a schematic diagram showing execution of DL reception or UL transmission when DL reception according to an embodiment of the present invention is dynamic DL reception and UL transmission is dynamic UL transmission. Referring to FIG. 14, DL reception in the first resource 1401 is indicated by a first indication which is dynamically scheduled DCI, and UL transmission in the second resource 1402 is indicated by a second indication which is dynamically scheduled DCI. When at least one symbol of DL reception and UL transmission overlaps in the time domain, in response to determining that the reception timing of the second indication having the second priority “1” is later than the reception timing of the first indication having the first priority “1”, the UE 100 can execute UL transmission in the second resource 1402 but not execute (e.g., not expect) DL reception in the first resource 1401. In FIG. 14, the first resource 1401 is a DL resource and the second resource 1402 is a flexible resource. However, in other embodiments, the first resource 1401 carrying dynamic scheduled DL reception may be a flexible resource. In other embodiments, the second resource 1402 carrying dynamic scheduled UL transmission may be a UL resource.

[0056] FIG. 15 is a schematic diagram of high-speed DL reception according to an exemplary embodiment of the present invention. Referring to FIG. 15, the first resource may be a UL resource and the second resource may be a flexible resource. The UE 100 can receive DCI and the PDSCH indicated by the DCI in the DL resource 1501. Thereafter, PDSCH repeat can be executed in the flexible resource 1502. Since the flexible resource 1502 is configured based on the full duplex operation of the BS 200, the delay of PDSCH repeat can be reduced and the DL coverage is improved.

[0057] In some embodiments, if the UL transmission in the second resource is not configured, the UE 100 may perform DL reception via the first resource without performing UL transmission via the second resource. Specifically, in some embodiments, if the UL transmission in the second resource is not configured by any upper layer setting or any DCI, the UE 100 can receive DL reception in the first resource in response to receiving a corresponding indication such as a DCI format. Alternatively, in some embodiments, if the UL transmission in the second resource is not configured by any upper layer setting or any DC, the UE 100 can receive DL reception configured by the upper layer setting.

[0058] FIG. 16A is a schematic diagram showing performing DL reception or UL transmission without UL transmission according to an exemplary embodiment of the present invention. Referring to FIG. 16A, in response to the UL transmission not being scheduled in the second resource 1602 by any upper layer setting or any DCI, the UE 100 may perform DL reception indicated by the DCI in the second resource 1601. That is, if the UE 100 does not perform any UL transmission in the first resource 1601, the UE 100 may perform dynamic schedule DL reception in the second resource 1602. In FIG. 16A, the first resource 1601 is a flexible resource and the second resource 1602 is a UL resource. However, in other embodiments, the first resource 1601 that carries the dynamic schedule DL reception may be a DL resource. In other embodiments, the second resource 1602 in which the UL transmission is not configured may be a flexible resource.

[0059] FIG. 16B is a schematic diagram showing the execution of DL reception or UL transmission without UL transmission according to an exemplary embodiment of the present invention. Referring to FIG. 16B, in response to the UL transmission not being scheduled in the second resource 1604 by any upper layer setting or any DCI, the UE 100 may perform DL reception indicated by the upper layer setting within the second resource 1603. That is, if the UE 100 does not perform any UL reception in the second resource 1604, the UE 100 may perform DL reception of the upper layer setting in the first resource 1603. In FIG. 16B, the first resource 1603 is a flexible resource, and the second resource 1604 is a UL resource. However, in other embodiments, the first resource 1603 that carries the upper layer scheduled DL reception may be a DL resource. In other embodiments, the second resource 1604 in which the UL transmission is not configured may be a flexible resource.

[0060] In some embodiments, the UE 100 can receive a first indication for DL reception in the first resource and a second indication for UL transmission in the second resource, and the DL reception and the UL transmission compete with each other in the time domain. When the UL transmission is a scheduling request (SR), the UE 100 may perform UL transmission via the second resource without performing DL reception via the first resource. Specifically, regardless of whether the DL transmission in the first resource is indicated by the upper layer setting or the DCI, the UL transmission is selected to be executed when the UL transmission in the second resource is a scheduling request.

[0061] FIG. 17A is a schematic diagram showing execution of DL reception or UL transmission when UL transmission according to an exemplary embodiment of the present invention is SR. Referring to FIG. 17A, UE 100 receives a second indication indicating SR scheduled in a second resource 1702, and in response to at least one symbol of SR and DL reception overlapping in the time domain, executes SR transmission in the second resource 1702, but does not (e.g., does not expect to) execute DL reception in the first resource 1701 indicated by DCI. That is, when at least one symbol of SR and DL reception overlaps in the time domain, SR transmission in the second resource 1702 is executed, but dynamic schedule DL reception in the first resource 1701 is not executed. In FIG. 17A, the first resource 1701 is a flexible resource, and the second resource 1702 is a UL resource. However, in other embodiments, the first resource 1701 carrying dynamic schedule DL reception may be a DL resource. In other embodiments, the second resource 1702 carrying SR may be a flexible resource.

[0062] Figure 17B is a schematic diagram showing the execution of DL reception or UL transmission when the UL transmission according to an exemplary embodiment of the present invention is SR. Referring to Figure 17B, UE 100 receives a second indication indicating SR scheduled in a second resource 1704, and in response to at least one symbol of SR and DL reception overlapping in the time domain, UE 100 performs SR transmission in the second resource 1704, but does not (e.g., does not expect to) perform DL reception in a first resource 1703 indicated by upper layer configuration. That is, when at least one symbol of SR and DL reception overlaps in the time domain, SR transmission is performed in the second resource 1704, but upper layer scheduled DL reception in the first resource 1703 is not performed. In Figure 17B, a first resource 1701 is a flexible resource, and a second resource 1702 is a UL resource. However, in other embodiments, the first resource 1701 carrying dynamically scheduled DL reception may be a DL resource. In other embodiments, the second resource 1702 carrying SR may be a flexible resource.

[0063] In some embodiments, UE 100 can receive a first indication indicating DL reception in a first resource and a second indication indicating UL transmission in a second resource, and DL reception and UL transmission compete with each other in the time domain. When the UL transmission is Message 1 (Msg1) or Message 3 (Msg3) of a Random Access (RA) procedure, UE 100 may perform UL transmission via the second resource without performing DL reception via the first resource. Specifically, regardless of whether the DL transmission in the first resource is indicated by upper layer configuration or DCI, the UL transmission is selected to be performed when the UL transmission in the second resource is Msg1 or Msg3 of the RA procedure.

[0064] FIG. 18A is a schematic diagram showing execution of DL reception or UL transmission when the UL transmission according to an exemplary embodiment of the present invention is an RA message. Referring to FIG. 18A, UE 100 receives a second indication indicating Msg1 or Msg3 of an RA procedure scheduled in a second resource 1802, and when at least one symbol of the RA message and DL reception overlaps in the time domain, Msg1 or Msg3 of the RA procedure is transmitted in the second resource 1802, but DL reception may not be performed (e.g., not expected) in the first resource 1801 indicated by DCI. That is, Msg1 or Msg3 of the RA procedure in the second resource 1802 is transmitted, but when at least one symbol of the RA message and DL reception overlaps in the time domain, dynamic schedule DL reception in the first resource 1801 is not performed. In FIG. 18A, the first resource 1801 is a flexible resource, and the second resource 1802 is a UL resource. However, in other embodiments, the first resource 1801 carrying dynamic schedule DL reception may be a DL resource. In other embodiments, the second resource 1802 carrying the RA message may be a flexible resource.

[0065] FIG. 18B is a schematic diagram showing execution of DL reception or UL transmission when the UL transmission according to an exemplary embodiment of the present invention is an RA message. Referring to FIG. 18B, the UE 100 receives a second indication indicating Msg1 or Msg3 of the RA procedure scheduled in the second resource 1804, and when at least one symbol of the RA message and the DL reception overlaps in the time domain, transmits Msg1 or Msg3 of the RA procedure in the second resource 1804, but can refrain from (e.g., not expect to) performing DL reception in the first resource 1803 indicated by the upper layer configuration. That is, when at least one symbol of the RA message and the DL reception overlaps in the time domain, Msg1 or Msg3 of the RA procedure in the second resource 1804 is transmitted, but the upper layer scheduled DL reception in the first resource 1803 is not performed. In FIG. 18B, the first resource 1803 is a flexible resource, and the second resource 1804 is a UL resource. However, in other embodiments, the first resource 1803 that carries the dynamically scheduled DL reception may be a DL resource. In other embodiments, the second resource 1804 that carries the RA message may be a flexible resource.

[0066] FIG. 19 is a schematic diagram showing execution of DL reception or UL transmission when UL transmission according to an embodiment of the present invention is configured by a higher layer. Referring to FIG. 19, DL reception in the first resource 1901 is indicated by a first indication which is dynamically scheduled DCI, and UL transmission in the second resource 1902 is indicated by a second indication which is a higher layer setting. In response to at least one symbol of DL reception and UL transmission overlapping in the time domain, the UE 100 can perform DL reception in the first resource 1901 and not perform (e.g., not expect) UL transmission in the second resource 1902. That is, when DL reception and UL transmission overlap in the time domain, the higher layer scheduled UL transmission in the second resource 1902 is not performed, and the dynamically scheduled DL reception in the first resource 1901 is performed. In FIG. 19, the first resource 1901 is a flexible resource, and the second resource 1902 is a UL resource. However, in other embodiments, the first resource 1901 carrying the dynamically scheduled DL reception may be a DL resource. In other embodiments, the second resource 1902 carrying the higher layer scheduled UL transmission may be a flexible resource.

[0067] FIG. 20 is a schematic diagram showing execution of DL reception or UL transmission when UL transmission according to an exemplary embodiment of the present invention is dynamic UL transmission. Referring to FIG. 20, DL reception at the first resource 2001 is indicated by a first indication which is a higher layer setting, and UL transmission at the second resource 2002 is indicated by a second indication which is a dynamically scheduled DCI. In response to at least one symbol of DL reception and UL transmission overlapping in the time domain, the UE 100 can perform UL transmission at the second resource 2002 but not perform (e.g., not expect) DL reception at the first resource 2001. That is, when DL reception and UL transmission overlap in the time domain, the higher layer scheduled DL reception at the first resource 2001 is not executed, and the dynamically scheduled UL transmission at the second resource 2002 is executed. In FIG. 20, the first resource 2001 is a flexible resource, and the second resource 2002 is a UL resource. However, in other embodiments, the first resource 2001 that carries the higher layer scheduled DL reception may be a DL resource. In other embodiments, the second resource 2002 that carries the dynamically scheduled UL transmission may be a flexible resource.

[0068] In some embodiments, when the first indication is a dynamically scheduled DCI and the second indication is another dynamically scheduled DCI, the UE 100 can perform either DL reception or UL transmission by comparing a priority parameter indicated by the first indication with another priority parameter indicated by the second indication. In some embodiments, when the first indication is a dynamically scheduled DCI, the second indication is another dynamically scheduled DCI, and at least one symbol of the DL signal and the UL signal overlaps in the time domain, if the second priority indicated by the second indication is higher than the first priority indicated by the first indication, the UE 100 can perform UL transmission via the second resource without performing DL reception via the first resource.

[0069] FIG. 21A is a schematic diagram showing execution of DL reception or UL transmission when DL reception according to an embodiment of the present invention is dynamic DL reception and UL transmission is dynamic UL transmission. Referring to FIG. 21A, DL reception in the first resource 2101 is indicated by a first indication which is dynamically scheduled DCI, and UL transmission in the second resource 2102 is indicated by a second indication which is dynamically scheduled DCI. When at least one symbol of DL reception and UL transmission overlaps in the time domain, in response to determining that a second priority “1” indicated by the second indication is higher than a first priority “0” indicated by the first indication, the UE 100 can execute UL transmission in the second resource 2102 and not execute (for example, not expect) DL reception in the first resource 2101. In FIG. 21A, the first resource 2101 is a flexible resource and the second resource 2102 is a UL resource. However, in other embodiments, the first resource 2101 carrying dynamically scheduled DL reception may be a DL resource. In other embodiments, the second resource 2102 carrying dynamically scheduled UL transmission may be a flexible resource.

[0070] In some embodiments, when the first indication is dynamically scheduled DCI, the second indication is another dynamically scheduled DCI, and the first priority indicated by the first indication is the same as the second priority indicated by the second indication, the UE 100 can execute either DL reception or UL transmission by comparing the reception timing of the first indication and the reception timing of the second indication. In some embodiments, when the first indication is dynamically scheduled DCI, the second indication is another dynamically scheduled DCI, and at least one symbol of the DL signal and the UL signal overlaps in the time domain, and the reception time of the second indication is later than the reception time of the first indication, the UE 100 can execute UL transmission via the second resource without executing DL reception via the first resource.

[0071] Figure 21B is a schematic diagram showing the execution of DL reception or UL transmission when DL reception according to an embodiment of the present invention is dynamic DL reception and UL transmission is dynamic UL transmission. Referring to Figure 21B, DL reception in the first resource 2103 is indicated by a first indication which is dynamically scheduled DCI, and UL transmission in the second resource 2104 is indicated by a second indication which is dynamically scheduled DCI. When at least one symbol of DL reception and UL transmission overlaps in the time domain, in response to determining that the reception timing of the first indication having a first priority "1" is later than the reception timing of the second indication having a first priority "1", the UE 100 can perform DL reception in the first resource 2103 but not (e.g., not expect to) perform UL transmission in the second resource 2104. In Figure 21B, the first resource 2103 is a flexible resource and the second resource 2104 is a UL resource. However, in other embodiments, the first resource 2103 carrying the dynamically scheduled DL reception may be a DL resource. In other embodiments, the second resource 2104 carrying the dynamically scheduled UL transmission may be a flexible resource.

[0072] In some embodiments, the UE 100 can perform BWP switching for UL transmission in order to reduce the delay of UL transmission (e.g., HARQ feedback). Embodiments related to BWP switching for UL transmission are introduced in the following paragraphs.

[0073] In some embodiments, UE100 can receive at least one instruction that instructs at least one of DL reception and UL transmission. The at least one instruction includes a first instruction that instructs DL reception and a second instruction that instructs UL transmission. That is, UE100 may receive a first instruction that instructs DL reception on a first resource and a second instruction that instructs UL transmission on a second resource. Note that in some embodiments, it should be noted that the second instruction is a field of the first instruction. The first resource is the first BWP, and the second resource is the second BWP.

[0074] In some embodiments, after performing DL reception via the first BWP instructed by the first instruction, UE100 can perform UL transmission via the second BWP instructed by the second instruction. The UL transmission is a HARQ transmission. That is, the UL transmission in the second BWP may include HARQ-ACK or HARQ-NACK. UE100 can perform PDSCH reception on the first BWP instructed by the first instruction which is a DL DCI format, and such a DL DCI format may include a field for notifying the second BWP on which UE100 can transmit HARQ feedback for PDSCH reception. For example, the field in such a DL DCI format may be a BWP indicator for HARQ feedback, and the BWP indicator may be a BWP ID.

[0075] In some embodiments, after UL transmission (e.g., HARQ transmission), UE 100 may perform BWP switching from a second BWP to a first BWP. In some embodiments, after UL transmission, UE 100 may perform BWP switching from the second BWP to a third BWP indicated by a first indication. That is, after the UL transmission indicated by the second indication of the second BWP is completed, UE 100 can automatically perform BWP switching back from the second BWP to the first BWP without any indication. Alternatively, after the UL transmission indicated by the second indication in the second BWP is completed, UE 100 may perform BWP switching back from the second BWP to the first BWP indicated by the first indication.

[0076] FIG. 22 is a schematic diagram showing explicit BWP switching for HARQ by DCI according to an exemplary embodiment of the present invention. Referring to FIG. 22, UE 100 can receive PDSCH 222 indicated by DCI 221 in slot #n via BWP#0. The field (i.e., the second indication) of DCI 221 (i.e., the first indication) may include a BWP indicator indicating BWP#1 for HARQ feedback transmission. Therefore, UE 100 may perform BWP switching from BWP#0 to BWP#1 and perform HARQ feedback transmission corresponding to PDSCH 222 using BWP#1. HARQ feedback 223 can be transmitted in slot #(n + 1) using BWP#1. After HARQ feedback 223 is transmitted, UE 100 can perform a BWP switch again from BWP#1 to BWP#0 indicated by another field of DCI 221. DCI 221 includes a field indicating the target BWP for HARQ transmission, and DCI 221 also includes another field indicating other target BWPs to be activated after HARQ transmission.

[0077] In some embodiments, the time position for performing HARQ transmission is notified to UE100, and thus, the target BWP for HARQ transmission may be indicated by such a time position. In some embodiments, when the time position of the UL transmission within the first BWP is a UL resource and the time position of the UL transmission is indicated by a second indication, the second BWP is the same as the first BWP. That is, UE100 does not have to perform BWP switching for HARQ transmission when the time position of the UL transmission indicated by the second indication corresponds to the UL resource of the currently activated BWP.

[0078] In some embodiments, when the time position of the UL transmission within the first BWP is a DL resource and the time position of the UL transmission within the second BWP is a UL resource, the second BWP is different from the first BWP, and the time position of the UL transmission is indicated by a second indication. That is, UE100 can perform BWP switching for HARQ transmission when the time position of the UL transmission indicated by the second indication corresponds to the DL resource of the currently activated BWP. Further, UE100 may perform BWP switching to the second BWP where the UL resource corresponds to the time position of the UL transmission. In some embodiments, the second BWP has the lowest BWP ID among a plurality of candidate BWPs. That is, when there are a plurality of candidate BWPs having a UL resource at the time position indicated by the second indication, UE100 may select the second BWP having the lowest BWP ID among the plurality of candidate BWPs.

[0079] In some embodiments, UE100 may perform PDSCH reception in slot #n of the first BWP indicated by the DL DCI format, and the DL DCI format may include a PDSCH-to-HARQ feedback timing indicator field. The PDSCH-to-HARQ feedback timing indicator field may indicate a value of k, where the value of k is the time position of the UL transmission that is the HARQ feedback transmission, and k is an integer greater than 0. If slot #(n + k) of the first BWP includes UL resources, the UE may transmit HARQ corresponding to the PDSCH reception in slot #(n + k) of the first BWP. Alternatively, if the candidate BWP includes UL resources in slot #(n + k), UE100 may transmit HARQ feedback corresponding to the PDSCH reception in slot #(n + k) of the candidate BWP. If multiple candidate BWPs include UL resources on slot #(n + k), UE100 may transmit HARQ on the selected candidate BWP according to the BWP index. For example, the selected candidate BWP may have the lowest BWP index (i.e., the lowest BWP ID).

[0080] Figure 23A is a schematic diagram showing implicit BWP switching for HARQ by DCI according to an exemplary embodiment of the present invention. Referring to Figure 23A, UE 100 can receive PDSCH 232 indicated by DCI 231 in slot #n via BWP#0. The field of DCI 231 (i.e., the first instruction) (i.e., the second instruction) may include the time position of the HARQ feedback. The time position of the HARQ feedback may be the value of k. In Figure 23A, k = 1 is indicated by DCI 231. That is, the PDSCH-to-HARQ_feedback timing indicator field of DCI 231 can indicate a value of 1. Therefore, in slot #n, after receiving PDSCH 232 indicated by DCI 231, since the UL resource is included in slot #(n + 1) of BWP#1, UE 100 can perform BWP switching to BWP#1. Therefore, UE 100 can transmit HARQ feedback (i.e., PUCCH 233) in slot #(n + 1) using BWP#1.

[0081] Figure 23B is a schematic diagram showing implicit BWP switching for HARQ by DCI according to an exemplary embodiment of the present invention. Referring to Figure 23B, UE 100 can receive PDSCH 232 indicated by DCI 231 in slot #n via BWP#0. The field of DCI 231 (i.e., the first instruction) (i.e., the second instruction) may include the time position of the HARQ feedback. The time position of the HARQ feedback may be the value of k. In Figure 23B, k = 1 is indicated by DCI 231. Further, in slot #(n + 1), both BWP#1 and BWP#2 have UL resources, and UE 100 may select BWP#1 having the lower BWPID for transmitting the HARQ feedback. Therefore, after receiving PDSCH 232 indicated by DCI 231 in slot #n, UE 100 may perform BWP switching to BWP#1. Therefore, UE 100 can transmit HARQ feedback (i.e., PUCCH 233) in slot #(n + 1) using BWP#1.

[0082] Figure 24A is a schematic diagram showing BWP switching after UL transmission according to an exemplary embodiment of the present invention. Referring to Figure 24A, the UE 100 can receive the PDSCH 242 indicated by DCI 241 in slot #n via BWP#0. After the UL transmission (i.e., PUCCH 243) indicated by the second indication of BWP#1 is completed, the UE 100 performs BWP switching to BWP#0. That is, the UE 100 can automatically perform BWP switching from the second BWP to the first BWP without any instruction after the UL transmission indicated by the second indication of the second BWP is completed.

[0083] In some embodiments, after UL transmission, if the UE 100 does not have DL resources within a period when there is a second BWP, the UE 100 can perform BWP switching. The period may be indicated by RRC configuration. That is, the UE 100 can indicate the parameter of PeriodAfterUL (e.g., by RRC configuration). If the second BWP does not have DL resources within the time of PeriodAfterUL starting from the end of UL transmission, the UE 100 may perform BWP switching from the second BWP to the first BWP after UL transmission.

[0084] Figure 24B is a schematic diagram showing BWP switching after UL transmission according to an exemplary embodiment of the present invention. Referring to Figure 24B, the UE 100 can receive the DCI 244 indicating the UL transmission 245 in slot #(n + 1). The UE 100 can perform BWP switching from BWP#0 to BWP#1 to perform the UL transmission 245. After the UL transmission 245 in slot #(n + 1), since there are no DL resources within the period of PeriodAfterUL T1 (e.g., 2 slots) in BWP#1, the UE 100 can perform BWP switching from BWP#1 to BWP#0.

[0085] In some embodiments, after UL transmission, the UE 100 can perform BWP switching to a third BWP having the earliest DL resource from the second BWP. In some embodiments, after UL transmission, the UE 100 can perform BWP switching to a candidate BWP where the DL resource appears earliest from the second BWP. If there are multiple candidate BWPs, the UE 100 can select a candidate BWP according to the BWP ID, for example, the lower BWP ID.

[0086] FIG. 24C is a schematic diagram showing BWP switching after UL transmission according to an exemplary embodiment of the present invention. Referring to FIG. 24C, the UE 100 can receive DCI 244 indicating UL transmission 245 in slot #(n + 1). The UE 100 can perform BWP switching from BWP #0 to BWP #1 to perform UL transmission 245. After UL transmission 245 in slot #(n + 1), since BWP #2 has DL resources in the earliest slot #(n + 2) among BWP #0, BWP #1, and BWP #2, the UE 100 can perform BWP switching from BWP #1 to BWP #2.

[0087] FIG. 25 is a block diagram showing a communication device 2500 according to an exemplary embodiment of the present invention. Referring to FIG. 25, the communication device 2500 may be a UE. The communication device 2500 may include, but is not limited to, a processor 2510. The processor 2510 (for example, having a processing circuit) may include an intelligent hardware device, such as a central processing unit (CPU), a microcontroller, an ASIC, etc. The processor 2510 can call and execute a computer program from the memory to implement the method in the embodiments of the present invention.

[0088] When the program code stored in the communication device 2500 is executed by the processor 2510, in order to adopt all the technical solutions of all the foregoing embodiments, it has at least all the advantageous effects brought about by all the technical solutions of all the foregoing embodiments, and no further explanation will be given here.

[0089] Optionally, as shown in FIG. 25, the communication device 2500 may further include a memory 2520. The memory 2520 may include a computer storage medium in the form of volatile and / or non-volatile memory. The memory 2520 may be removable, non-removable, or a combination thereof. Exemplary memories include solid state memories, hard drives, optical disk drives, and the like. The processor 2510 can call and execute a computer program from the memory 2520 to implement the method in the embodiments of the present invention.

[0090] The memory 2520 may be a separate device independent of the processor 2510 or may be integrated into the processor 2510.

[0091] Optionally, as shown in FIG. 25, the communication device 2500 may further include a transceiver 2530, and the processor 2510 can control the transceiver 2530 to communicate with other devices. The transceiver 2530 having a transmitter (e.g., a transmit / transmission circuit) and a receiver (e.g., a receive / reception circuit) may be configured to transmit and / or receive time and / or frequency resource division information. In some implementations, the transceiver 2530 may be configured to transmit in different types of subframes and slots including, but not limited to, usable, unusable, and flexibly usable subframe and slot formats. The transceiver 2530 may be configured to receive data and control channels. The transceiver 2530 can perform low noise amplification (LNA), impedance matching, analog-to-digital (ADC) conversion, digital-to-analog (DAC) conversion, frequency mixing, up / down frequency conversion, filtering, amplification, and / or similar operations.

[0092] Specifically, the transceiver 2530 can transmit information or data to other devices or receive information or data transmitted by other devices.

[0093] Specifically, the transceiver 2530 may include a transmitter and a receiver. The transceiver 2530 may further include an antenna, and the number of antennas may be one or more.

[0094] In view of the foregoing description, in order to achieve full duplex, the frequency range can be divided into a plurality of resources as shown in the TDD configuration. Further, the collision between UL transmission and DL reception occurring on the UE side can be resolved, the UL coverage can be improved, the delay can be reduced, and the system capacity for NR duplex operation can be improved. Further, BWP switching for UL transmission and after UL transmission may be instructed to reduce the delay of UL transmission. It should be noted that the present invention does not require all of the foregoing advantages.

[0095] The components, acts, or instructions used in the detailed description of the embodiments disclosed by the present invention should not be construed as absolutely important or essential to the present invention unless explicitly described as such. Also, as used herein, each of the indefinite articles "a" and "an" may include a plurality of items. When meaning only one item, the term "one" or similar language is used. Further, as used herein, the term "any" following a list of a plurality of items and / or a plurality of categories of items is intended to include "any of", "any combination", "a plurality of combinations", and / or "any combination of a plurality of items and / or a plurality of categories of items, individually or in combination with other items and / or other categories of items". Further, the term "set" as used herein is intended to include any number of items including zero. Further, the term "number" as used herein is intended to include any number including zero.

[0096] It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. Considering the above, the present invention is intended to cover modifications and variations of the present invention as long as they are within the scope of the following claims and their equivalents.

Industrial Applicability

[0097] The method of duplex operation and the user equipment using the same can be applied to future wireless communication systems.

Explanation of Signs

[0098] 201: DL Symbol 202: Flexible Symbol 203: UL Symbol 301, 302: Flexible Resource 51,52: DCI 53: PDSCH 55: PUSCH 200: BS 100: UE S601, S602: Step 701, 703: DL Resource 702, 704, 705: Flexible Resource 801, 803, 901, 903, 1001, 1003, 1101, 1201, 1301, 1401, 1601, 1603, 1701, 1703, 1802, 1804, 1901, 2001, 2101, 2103: First Resource 802, 804, 902, 904, 1002, 1004, 1102, 1202, 1302, 1402, 1602, 1604, 1702, 1704, 1801, 1803, 1902, 2002, 2102, 2104: Second Resource 1501: DL Resource 1502: Flexible Resource 221, 231, 241, 244: DCI 222, 232, 242: PDSCH 223: HARQ feedback 233, 243: PUCCH 245: UL transmission 2500: Communication device 2510: Processor 2520: Memory 2530: Transceiver

Claims

1. A method of duplex operation used by a user equipment (UE), comprising: Receiving at least one instruction for instructing at least one of DL reception and UL transmission; Performing the DL reception via a first resource or performing the UL transmission via a second resource according to a rule; A method comprising.

2. The method according to claim 1, wherein the DL reception and the UL transmission overlap in a time domain.

3. The method according to claim 1, wherein the first resource and the second resource are frequency division multiplexed (FDM).

4. The method according to claim 1, wherein the at least one instruction includes a first instruction for instructing the DL reception, a second instruction for instructing the UL transmission, or a combination thereof.

5. According to the rule, the step of performing the DL reception via the first resource or performing the UL transmission via the second resource includes: When the DL reception is not configured in the first resource, performing the UL transmission via the second resource without performing the DL reception via the first resource. The method according to claim 4.

6. The at least one instruction includes the first instruction for instructing the DL reception and the second instruction for instructing the UL transmission, According to the rule, the step of performing the DL reception via the first resource or performing the UL transmission via the second resource includes: When the DL reception is an SSB reception, performing the DL reception via the first resource without performing the UL transmission via the second resource. The method according to claim 4.

7. The at least one instruction includes the first instruction for instructing the DL reception and the second instruction for instructing the UL transmission, According to the rule, the step of performing the DL reception via the first resource or performing the UL transmission via the second resource includes: When the DL reception is a CORESET reception associated with a first group of search spaces (SS) and the second instruction is a dynamically scheduled DCI, performing the UL transmission via the second resource without performing the DL reception via the first resource. The method according to claim 4.

8. The method according to claim 7, wherein the first group of SSs includes a type 1 common search space (CSS) having a dedicated RRC configuration, a type 3 CSS, or a UE-specific SS.

9. The at least one indication includes the first indication for indicating the DL reception and the second indication for indicating the UL transmission, The step of receiving the DL reception via the first resource or performing the UL transmission via the second resource according to the rule The method according to claim 4, including performing the DL reception via the first resource without performing the UL transmission via the second resource when the DL reception is a CORESET reception associated with a second group of search spaces and the second indication is a dynamically scheduled DCI.

10. The method according to claim 9, wherein the second group of SSs includes a type 1 CSS without a dedicated RRC configuration, a type 0 CSS, a type 0A CSS, or a type 2 CSS.

11. The at least one indication includes the first indication for indicating the DL reception and the second indication for indicating the UL transmission, The step of receiving the DL reception via the first resource or performing the UL transmission via the second resource according to the rule The method according to claim 4, including performing the UL transmission via the second resource without performing the DL reception via the first resource when the first indication is a higher layer configuration and the second indication is a dynamically scheduled DCI.

12. The at least one indication includes the first indication for indicating the DL reception and the second indication for indicating the UL transmission, The step of receiving the DL reception via the first resource or performing the UL transmission via the second resource according to the rule The method according to claim 4, including performing the DL reception via the first resource without performing the UL transmission via the second resource when the first indication is a dynamically scheduled DCI and the second indication is a higher layer configuration.

13. The at least one indication includes the first indication for indicating the DL reception and the second indication for indicating the UL transmission, The first instruction is a dynamically scheduled DCI, and the second instruction is another dynamically scheduled DCI. According to the rule, the step of performing the DL reception via the first resource or performing the UL transmission via the second resource The method according to claim 4, including performing the DL reception via the first resource without performing the UL transmission via the second resource when a first priority indicated by the first instruction is higher than a second priority indicated by the second instruction.

14. The at least one instruction includes the first instruction for instructing the DL reception and the second instruction for instructing the UL transmission. The first instruction is a dynamically scheduled DCI, and the second instruction is another dynamically scheduled DCI. A first priority indicated by the first instruction is the same as a second priority indicated by the second instruction. According to the rule, the step of performing the DL reception via the first resource or performing the UL transmission via the second resource The method according to claim 4, including performing the DL reception via the first resource without performing the UL transmission via the second resource when a reception time of the first instruction is later than a reception time of the second instruction.

15. According to the rule, the step of performing the DL reception via the first resource or performing the UL transmission via the second resource The method according to claim 4, including performing the DL reception via the first resource without performing the UL transmission via the second resource when the UL transmission in the second resource is not configured.

16. The at least one instruction includes the first instruction for instructing the DL reception and the second instruction for instructing the UL transmission. According to the rule, the step of performing the DL reception via the first resource or performing the UL transmission via the second resource The method according to claim 4, including performing the UL transmission via the second resource without performing the DL reception via the first resource when the UL transmission is a scheduling request (SR).

17. The at least one instruction includes the first instruction for instructing the DL reception and the second instruction for instructing the UL transmission. The step of performing DL reception via the first resource or performing the UL transmission via the second resource according to the rule is The method according to claim 4, including performing the UL transmission via the second resource without performing the DL reception via the first resource when the UL transmission is Message 1 (Msg1) or Message 3 (Msg3) of a random access (RA) procedure.

18. The at least one instruction includes the first instruction for instructing the DL reception and the second instruction for instructing the UL transmission. The first instruction is a dynamically scheduled DCI, and the second instruction is another dynamically scheduled DCI. The step of performing DL reception via the first resource or performing the UL transmission via the second resource according to the rule is The method according to claim 4, including performing the UL transmission via the second resource without performing the DL reception via the first resource when a second priority indicated by the second instruction is higher than a first priority indicated by the first instruction.

19. The at least one instruction includes the first instruction for instructing the DL reception and the second instruction for instructing the UL transmission. The first instruction is a dynamically scheduled DCI, and the second instruction is another dynamically scheduled DCI. A first priority indicated by the first instruction is the same as a second priority indicated by the second instruction. The step of performing DL reception via the first resource or performing the UL transmission via the second resource according to the rule is The method according to claim 4, including performing the UL transmission via the second resource without performing the DL reception via the first resource when a reception time of the second instruction is later than a reception time of the first instruction.

20. The method according to claim 4, wherein the first instruction is a higher layer setting or a dynamically scheduled DCI.

21. The method according to claim 4, wherein the second instruction is a higher layer setting or a dynamically scheduled DCI.

22. The method according to claim 1, wherein the first resource is a DL resource and the second resource is a flexible resource.

23. The method according to claim 1, wherein the first resource is a flexible resource and the second resource is a UL resource.

24. The method according to claim 1, wherein the first resource is a flexible resource and the second resource is another flexible resource.

25. The method according to claim 1, wherein the first resource is a DL resource and the second resource is a UL resource.

26. The at least one instruction includes a first instruction for instructing the DL reception and a second instruction for instructing the UL transmission, the second instruction is a field of the first instruction, the first resource is a first BWP, the second resource is a second BWP, the step of performing DL reception via the first resource or performing the UL transmission via the second resource according to the rule is including performing the DL reception via the first BWP and then performing the UL transmission via the second BWP, according to the method of claim 1.

27. The method according to claim 26, further including performing BWP switching from the second BWP to the first BWP after the UL transmission.

28. The method according to claim 26, further including performing BWP switching from the second BWP to a third BWP as instructed by the first instruction after the UL transmission.

29. When the time position of the UL transmission within the first BWP is a UL resource, the second BWP is the same as the first BWP, the time position of the UL transmission is instructed by the second instruction, according to the method of claim 26.

30. When the time position of the UL transmission within the first BWP is a DL resource and the time position of the UL transmission within the second BWP is a UL resource, the second BWP is different from the first BWP, the time position of the UL transmission is instructed by the second instruction, according to the method of claim 26.

31. The method according to claim 30, wherein the second BWP has the lowest BWP ID among a plurality of candidate BWPs.

32. The method according to claim 26, further comprising performing BWP switching when there is no DL resource within a period during which there is a second BWP after the UL transmission.

33. The method according to claim 26, further comprising performing BWP switching from the second BWP to a third BWP having the earliest DL resource after the UL transmission.

34. The method according to claim 26, wherein the UL transmission is a HARQ transmission.

35. A transceiver, connected to the transceiver and receiving at least at least one instruction for instructing at least one of DL reception and UL transmission, and a processor configured to perform the DL reception via a first resource or perform the UL transmission via a second resource according to rules. A user equipment comprising:

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