Wireless communication method, device and system

Abstract

An embodiment of the present invention provides a wireless communication method, device, and system, which includes the steps of: a terminal device receiving control information that triggers a channel or a signal, where reception or monitoring of the control information is associated with two TCI states and a DCI format corresponding to the control information does not include a TCI field; and the terminal device transmitting or receiving the channel or signal based on the two TCI states or one of the two TCI states.

Description

[Technical Field]

[0001] The present invention relates to the field of communications. [Background technology]

[0002] NR (New Radio) introduces a high-frequency communication method to alleviate the strain on spectrum resources, thereby increasing the frequency resources available to communication systems and improving system capacity.

[0003] NR Release 15 introduces a method for indicating the quasi-collocation (QCL) parameters of the physical downlink control channel (PDCCH). Generally, in a control resource set (CORESET), the QCL parameters of the antenna ports of the PDCCH DM-RS (Demodulation Reference Signal) are indicated by radio resource control (RRC) signaling and media access control-control element (MAC-CE) signaling. Specifically, when a CORESET corresponding to one PDCCH is configured with two or more transmission configuration indicator (TCI) states by RRC signaling (tci-StatesPDCCH-ToAddList or tci-StatesPDCCH-ToReleaseList), one of the TCI states can be activated using the MAC-CE. When a TCI state is activated, the antenna port of the DM-RS of the PDCCH and the reference signal corresponding to the activated TCI state are quasi-colocated (QCL).

[0004] NR Release 15 also introduces a method for specifying QCL parameters of a PDSCH (Physical Downlink Shared Channel). Generally, in the case of dynamic scheduling, there are two ways to indicate the QCL parameters of a PDSCH. That is, if a TCI field is included in the scheduling DCI (Downlink Control Information) format of a PDSCH, the QCL parameters of the PDSCH are determined from the TCI state indicated by the TCI field of the DCI format. If a TCI field is not included in the scheduling DCI format of a PDSCH, the QCL parameters of the PDSCH are determined from the TCI state or QCL assumption applied by a CORESET receiving the DCI format (PDSCH).

[0005] The above description of the background art is merely for the purpose of explaining the configuration of the present invention more clearly and completely, and is provided for the understanding of those skilled in the art. These configurations described in the background art of the present invention should not be construed as being well known to those skilled in the art. Summary of the Invention [Problem to be solved by the invention]

[0006] According to the findings of the present inventors, NR systems support high center transmission frequencies up to 52.6 GHz. In high-frequency scenarios, signal diffraction capability is poor, making them prone to blockage. The degradation of channel quality due to blockage is highly detrimental to URLLC (Ultra-Reliable and Low Latency Communication) services. This is because existing beam failure recovery mechanisms require at most tens of milliseconds to restore a communication link, whereas URLLC communication latency requirements are generally much lower than tens of milliseconds. In the event of blockage, the channel corresponding to the high-frequency downlink may be instantaneously degraded. However, existing recovery mechanisms take too long to meet the latency requirements of URLLC services.

[0007] To reduce the impact of shadowing on the downlink link, especially on downlink control information, one possible approach is to transmit the downlink control information in a spatial diversity manner. That is, the same downlink control information can reach the UE (User Equipment) via different spatial domain paths or different TRPs (transmission and reception points). In this way, even if one path is shadowed, the other paths can still continue to operate, ensuring low latency and high reliability of the downlink control information.

[0008] However, when one piece of downlink control information is associated with two TCI states (i.e., simultaneously passes through two different spatial domain paths) and the downlink control information does not include a TCI field, the existing mechanism cannot determine the TCI state associated with the channel (or signal) triggered by the downlink control information. More specifically, in this case, although the downlink control information is associated with two TCI states, the prior art cannot identify the relationship between the two TCI states associated with the downlink control information and the TCI state associated with the PDSCH scheduled by the downlink control information.

[0009] To address the above-mentioned and other similar problems, embodiments of the present invention provide wireless communication methods, apparatus, and systems that avoid system performance degradation due to uncertain channel or signal TCI conditions. [Means for solving the problem]

[0010] In one aspect of an embodiment of the present invention, there is provided a wireless communication method including the steps of: a terminal device receiving control information that triggers a channel or a signal, wherein reception or monitoring of the control information is associated with two TCI states and a DCI format corresponding to the control information does not include a TCI field; and transmitting or receiving the channel or signal based on the two TCI states or one of the two TCI states.

[0011] Another aspect of an embodiment of the present invention provides a wireless communication method, including a step in which a network device transmits control information related to two TCI states, where a DCI format corresponding to the control information includes a TCI field.

[0012] Another aspect of an embodiment of the present invention provides a wireless communication method, including a step in which a terminal device receives control information related to two TCI states, where a DCI format corresponding to the control information includes a TCI field.

[0013] Another aspect of an embodiment of the present invention provides a wireless communication device configured in a terminal device, the device including: a receiving unit that receives control information that triggers a channel or a signal, wherein reception or monitoring of the control information is related to two TCI states, and a DCI format corresponding to the control information does not include a TCI field; and a processing unit that transmits or receives the channel or signal based on the two TCI states or one of the two TCI states.

[0014] Another aspect of the present invention provides a wireless communication device configured in a network device, the device including: a transmitter that transmits control information related to two TCI states, where a DCI format corresponding to the control information includes a TCI field.

[0015] Another aspect of the present invention provides a wireless communication device configured in a terminal device, the device including: a receiver that receives control information related to two TCI states, where a DCI format corresponding to the control information includes a TCI field.

[0016] The advantageous effects of the embodiment of the present invention are as follows: When a single piece of control information (not including a TCI field) triggers a channel or signal, the TCI status of the channel or signal is determined by the TCI status associated with the control information. This method allows a mapping relationship between two TCI statuses associated with the control information and the TCI status of the signal or channel to be determined, thereby avoiding ambiguity in the TCI status of the channel or signal and reducing overhead caused by indicating the TCI status of the channel or signal in the control information. On the other hand, when a single piece of control information triggers a channel or signal and the control information is associated with two TCI statuses, the control information includes a TCI field. This method allows the control information to always include a TCI field, and the TCI status of the signal or channel triggered by the control information is indicated by the included TCI field, thereby clarifying the TCI status of the signal or channel and enabling more flexible indication of the TCI status of the signal or channel.

[0017] As shown in the following description and drawings, specific embodiments of the present invention are disclosed in detail to illustrate ways in which the principles of the present invention can be employed. However, the scope of the present invention is not limited to these embodiments. The present invention encompasses all modifications, alterations, and equivalents within the spirit and scope of the appended claims.

[0018] Features described and / or shown in one embodiment may be used in the same or similar manner in one or more other embodiments, may be combined with features in other embodiments, or may be substituted for features in other embodiments.

[0019] It should be noted that in this text, the term "comprise / have" means the presence of a feature, element, step or component, and does not exclude the presence or addition of one or more other features, elements, steps or components. [Brief explanation of the drawings]

[0020] Elements and features depicted in one drawing and one embodiment of an example of the invention may be combined with elements and features shown in one or more drawings or embodiments, and in the drawings, like reference numerals may indicate corresponding elements in multiple drawings and may indicate corresponding elements used in more than one embodiment.

[0021] The drawings included are used to further understand the embodiments of the present invention, constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the written description, explain the principles of the present invention. Note that the drawings described below are merely some examples of the present invention, and those skilled in the art can easily imagine other drawings based on these drawings. [Figure 1] 1 is a schematic diagram of a wireless communication method according to a first embodiment of the present invention; [Figure 2] 1 is a schematic diagram of a mapping relationship between the TCI state of a PDCCH and the TCI state of a PDSCH of a single TCI scheduled by the PDCCH; [Figure 3] 10 is another schematic diagram of the mapping relationship between the TCI state of a PDCCH and the TCI state of a single-TCI PDSCH scheduled by the PDCCH. FIG. [Figure 4] 10 is another schematic diagram of the mapping relationship between the TCI state of a PDCCH and the TCI state of a single-TCI PDSCH scheduled by the PDCCH. FIG. [Figure 5] 10 is another schematic diagram of the mapping relationship between the TCI state of a PDCCH and the TCI state of a single-TCI PDSCH scheduled by the PDCCH. FIG. [Figure 6] 10 is another schematic diagram of the mapping relationship between the TCI state of a PDCCH and the TCI state of a single-TCI PDSCH scheduled by the PDCCH. FIG. [Figure 7] 1 is a schematic diagram of a mapping relationship between the TCI state of a PDCCH and the TCI state of a multi-TCI PDSCH scheduled by the PDCCH; [Figure 8]10 is another schematic diagram of a mapping relationship between the TCI state of a PDCCH and the TCI state of a multi-TCI PDSCH scheduled by the PDCCH. FIG. [Figure 9] FIG. 6 is a schematic diagram of a wireless communication method according to a second embodiment of the present invention. [Figure 10] 1 is a schematic diagram of a mapping relationship between the TCI state of a PDCCH and the TCI state of a single-TCI PDSCH scheduled by the PDCCH; [Figure 11] 1 is a schematic diagram of a mapping relationship between the TCI state of a PDCCH and the TCI state of a multi-TCI PDSCH scheduled by the PDCCH; [Figure 12] FIG. 10 is a schematic diagram of a wireless communication method according to a third embodiment of the present invention. [Figure 13] 10 is a schematic diagram illustrating a mapping relationship between the TCI state of a PDCCH and the TCI state of a single-TCI PDSCH scheduled by the PDCCH. [Figure 14] 10 is a schematic diagram illustrating a mapping relationship between the TCI state of a PDCCH and the TCI state of a multi-TCI PDSCH scheduled by the PDCCH. [Figure 15] FIG. 10 is a schematic diagram of a wireless communication device according to a fourth embodiment of the present invention. [Figure 16] FIG. 10 is a schematic diagram of a wireless communication device according to a fifth embodiment of the present invention. [Figure 17] FIG. 10 is a schematic diagram of a wireless communication device according to a sixth embodiment of the present invention. [Figure 18] FIG. 10 is a schematic diagram of a communication system according to a seventh embodiment of the present invention. [Figure 19] FIG. 10 is a schematic diagram of a terminal device according to a seventh embodiment of the present invention. [Figure 20] FIG. 10 is a schematic diagram of a network device according to a seventh embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] The above and other features of the present invention will become apparent from the following description. In the specification and drawings, specific embodiments of the present invention are disclosed in detail, and some of the embodiments in which the principles of the present invention can be adopted are shown. However, the present invention is not limited to the described embodiments. The present invention includes all modifications, variations, and equivalents within the scope of the appended claims. Below, various embodiments of the present invention will be described with reference to the drawings. These embodiments are merely illustrative and do not limit the present invention.

[0023] In embodiments of the present invention, the terms "first," "second," etc. are used in titles to distinguish between different elements, but do not represent the spatial arrangement or temporal order of these elements, and these elements are not limited to these terms. The term "and / or" includes any and all combinations of one or more of the terms listed in the associated list. The terms "comprise," "include," "have," etc. refer to the presence of listed features, elements, elements, or components, but do not exclude the presence or addition of one or more other features, elements, elements, or components.

[0024] In the embodiments of the present invention, the singular forms "one," "the," etc., include the plural and should be understood broadly as "one kind" or "one class," and are not limited to "one." Furthermore, the term "said" should be understood to include both the singular and the plural, unless the context clearly indicates otherwise. Furthermore, the term "described in" should be understood to mean "described at least in part," and the term "based on" should be understood to mean "based at least in part," unless the context clearly indicates otherwise.

[0025] In embodiments of the present invention, the terms "communication network" or "wireless communication network" may refer to a network conforming to any communication standard, such as, for example, Long Term Evolution (LTE), Long Term Evolution Advanced (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0026] Additionally, communications between devices in a communications system may occur according to any stage of communications protocol, including, but not limited to, 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and future 5G, New Radio (NR), etc., and / or other currently known or future developed communications protocols.

[0027] In an embodiment of the present invention, the term "network device" refers to a device in a communication system that allows a terminal device to access the communication system and provides a service to the terminal device, and may include, but is not limited to, a base station (BS), an access point (AP), a transmission reception point (TRP), a broadcast transmitter, a mobility management entity (MME), a gateway, a server, a radio network controller (RNC), a base station controller (BSC), etc.

[0028] Among them, the base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), a 5G base station (gNB), etc., as well as a remote radio head (RRH), a remote radio unit (RRU), a relay, or a low-power node (e.g., femto, pico, etc.). The term "base station" may include some or all of these functions, and each base station may provide communication coverage for a particular geographic area. The term "cell" may refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0029] In the embodiments of the present invention, the term "User Equipment" (UE) or "Terminal Equipment" (TE) refers to a device that accesses a communication network and receives network services via, for example, a network device. The terminal device may be fixed or mobile, and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, etc.

[0030] Among them, the terminal device may include, but is not limited to, a mobile phone, a personal digital assistant (PDA), a wireless modulation / demodulation device, a wireless communication device, a handheld device, a machine-type communication device, a laptop computer, a cordless phone, a smartphone, a smart watch, a digital camera, etc.

[0031] For example, in a scenario such as the Internet of Things (IoT), the user equipment may be a monitoring or measuring device or apparatus, including, but not limited to, a Machine Type Communication (MTC) terminal, an in-vehicle communication terminal, a Device to Device (D2D) terminal, a Machine to Machine (M2M) terminal, etc.

[0032] Various embodiments of the present invention will now be described with reference to the drawings, which are merely illustrative and not limiting of the present invention.

[0033] Example 1 An embodiment of the present invention provides a wireless communication method, which is described from the terminal device side.

[0034] 1 is a schematic diagram of a wireless communication method according to a first embodiment of the present invention. As shown in FIG. 1, the method includes the following steps:

[0035] Step 101: A terminal device receives control information that triggers a channel or signal, and the reception or monitoring of the control information is associated with two TCI states, and the DCI format corresponding to the control information does not include a TCI field.

[0036] Step 102: The terminal device transmits or receives the channel or signal based on the two TCI states or one of the two TCI states.

[0037] According to the method of the embodiment of the present invention, when a piece of control information (not including a TCI field) triggers a channel or a signal, the TCI state of the channel or signal is determined by the TCI state associated with the control information. This method can determine a mapping relationship between the two TCI states associated with the control information and the TCI state of the signal or channel, thereby avoiding ambiguity in the TCI state of the channel or signal and reducing the overhead caused by indicating the TCI state of the channel or signal in the control information.

[0038] In an embodiment of the present invention, a channel or a signal is associated with at least one of the two TCI states, and thus a terminal device can transmit or receive a channel or a signal according to the two TCI states or according to one of the two TCI states.

[0039] For example, one of the two TCI states is a first TCI state indicated by a MAC-CE command among the TCI states of a control resource set (CORESET) for receiving or monitoring control information. The terminal device transmits or receives the channel or signal based on the first TCI state. In this aspect, the TCI state of the channel or signal triggered by the control information is determined via the first TCI state indicated by MAC-CE signaling. This allows the TCI state of the channel or signal to be flexibly changed.

[0040] As another example, one of the two TCI states is the TCI state with the lowest ID among the TCI states of a control resource set (CORESET) for receiving or monitoring control information. The terminal device transmits or receives the channel or signal based on the TCI state with the lowest ID. In this aspect, the TCI state of the channel / signal triggered by the control information is determined by the TCI state with the lowest associated ID. This allows the TCI state of the channel or signal to be directly determined by the TCI state ID, thereby avoiding extra signaling overhead.

[0041] As another example, one of the two TCI states is a TCI state applied by a first control resource set indicated by RRC signaling among two control resource sets for receiving or monitoring control information. The terminal device transmits or receives the channel or signal based on this TCI state. In this aspect, the TCI state of the channel or signal triggered by the control information is determined based on the TCI state of the first CORESET indicated by RRC signaling. This allows the TCI state of the channel or signal to be flexibly changed.

[0042] As another example, one of the two TCI states is the TCI state applied by the control resource set with the lowest ID of two control resource sets for receiving or monitoring control information. The terminal device transmits or receives the channel or signal based on this TCI state. In this aspect, the TCI state of the channel or signal triggered by the control information is determined based on the TCI state of the CORESET with the lowest associated ID. This allows the TCI state of the channel or signal to be directly determined by the ID of the associated CORESET, thereby avoiding extra signaling overhead.

[0043] As another example, one of the two TCI states corresponds to a first search space set indicated by RRC signaling among two search space sets for receiving or monitoring control information. The terminal device transmits or receives the channel or signal based on this TCI state. In this aspect, the TCI state of the channel or signal triggered by the control information is determined by the TCI state of the first search space set indicated by RRC signaling. This allows the TCI state of the channel or signal to be flexibly changed.

[0044] As another example, one of the two TCI states corresponds to the search space set with the lowest ID among two search space sets for receiving or monitoring control information. The terminal device transmits or receives the channel or signal based on this TCI state. In this aspect, the TCI state of the channel or signal triggered by the control information is determined based on the TCI state of the search space set with the lowest associated ID. This allows the TCI state of the channel or signal to be directly determined based on the ID of the associated search space set, thereby avoiding extra signaling overhead.

[0045] As another example, one of the two TCI states is a TCI state applied by a time-frequency resource for receiving or monitoring control information. The terminal device transmits or receives the channel or signal based on this TCI state. In this aspect, the TCI state of the channel or signal triggered by the control information is determined by receiving or monitoring the time-frequency resource corresponding to the control information. This allows the TCI state of the channel or signal to be directly determined by the time-frequency resource, thereby avoiding extra signaling overhead.

[0046] In this example, the time-frequency resource for receiving or monitoring the control information may be the earliest symbol for receiving or monitoring the control information, the PRB (Physical Resource Block) with the lowest index for receiving or monitoring the control information, or the PRB with the lowest index in the earliest symbol for receiving or monitoring the control information, but the present invention is not limited thereto.

[0047] In some aspects, the channel or signal is a downlink channel or signal, such as a PDSCH or a CSI-RS (Channel State Information-Reference Signal), etc. In some aspects, the channel or signal is an uplink channel or signal, such as a PUSCH (Physical Uplink Shared Channel), a PUCCH (Physical Uplink Control Channel), and / or an SRS (Sounding Reference Signal).

[0048] If the channel or signal is a PDSCH, in some aspects the PDSCH is associated with a first TCI state, which may be at least one of the following:

[0049] a first TCI state indicated by a MAC-CE command among the TCI states of a control resource set (CORESET) for receiving or monitoring control information; The TCI state of the lowest ID among the TCI states of the control resource set (CORESET) for receiving or monitoring control information; a TCI state applied by a first control resource set indicated by RRC signaling of two control resource sets for receiving or monitoring control information; the TCI state applied by the control resource set with the lowest ID of the two control resource sets for receiving or monitoring control information; a TCI state corresponding to a first search space set indicated by RRC signaling among two search space sets for receiving or monitoring control information; A TCI state corresponding to the lowest ID search space set of two search space sets for receiving or monitoring control information; and The TCI state applied by the time-frequency resource for receiving or monitoring control information.

[0050] In the above aspect, the time-frequency resource for receiving or monitoring the control information may be the earliest symbol for receiving or monitoring the control information, the PRB with the lowest index for receiving or monitoring the control information, or the PRB with the lowest index in the earliest symbol for receiving or monitoring the control information, but the present invention is not limited thereto.

[0051] In the above embodiment, in some aspects, the PDSCH may be further associated with a second TCI state, which may be a TCI state other than the first TCI state of the two TCI states.

[0052] For example, if the above-mentioned first TCI state is the first TCI state indicated by a MAC-CE command among the TCI states of a control resource set (CORESET) for receiving or monitoring control information, then this second TCI state is the second TCI state indicated by a MAC-CE command.

[0053] Also, for example, if the above-mentioned first TCI state is the TCI state with the lowest ID among the TCI states of a control resource set (CORESET) for receiving or monitoring control information, this second TCI state is the TCI state with the highest ID among the TCI states of a control resource set (CORESET) for receiving or monitoring control information.

[0054] The same applies to other cases, and the explanations thereof will be omitted here.

[0055] In some aspects of the present invention, for example in a multiple TRP PDSCH scenario, the above channels or signals are associated with two TCI states.

[0056] In an embodiment of the present invention, the terminal device may determine whether to transmit or receive a channel or signal based on two TCI states or based on one of two TCI states based on RRC signaling or a DCI field in a DCI format. For example, this RRC signaling is used to indicate whether a channel or signal is associated with one TCI state or two TCI states. In some aspects, the DCI field in the DCI format may be a Time Domain Resource Allocation (TDRA) field in the DCI format. The present invention is not limited thereto.

[0057] In an embodiment of the present invention, a time offset between the control information and a channel or signal is equal to or greater than a pre-determined time period, for example, the time offset is equal to or greater than timeDurationForQCL. This allows the terminal device to determine the QCL parameters of the channel or signal based on the QCL parameters associated with the control information. For the definition of timeDurationForQCL, reference may be made to related art, and the description thereof will be omitted here.

[0058] The following describes the method of the present invention with reference to some specific examples.

[0059] FIG. 2 is a schematic diagram of a mapping relationship between the TCI state of a PDCCH and the TCI state of a PDSCH with a single TCI scheduled by the PDCCH.

[0060] As shown in Figure 2, in slot n, the UE receives PDCCH (control information) associated with two TCI states, and the PDCCH schedules PDSCH (channel or signal), where the scheduling offset between the PDCCH and PDSCH is equal to or greater than timeDurationForQCL. In this example, assume that SCS=60 kHz and the corresponding UE capability timeDurationForQCL is 7 symbols.

[0061] Furthermore, the DCI format corresponding to this PDCCH does not include a TCI field. The search space corresponding to this PDCCH is SS#1. The CORESET of this search space SS#1 is CORESET#1. CORESET#1 activates two TCI states, namely TCI#1 and TCI#2, by MAC-CE activation signaling, where the first TCI state activated by the MAC-CE activation signaling is TCI#1 and the second TCI state activated by the MAC-CE activation signaling is TCI#2. Furthermore, the TCI state applied by the first symbol of slot n is TCI#1 and the TCI state applied by the second symbol of slot n is TCI#2.

[0062] In this example, according to the method of the embodiment of the present invention, the UE can determine that the PDSCH is associated with one TCI state according to the following method 1 or method 2.

[0063] Method 1: Before the UE receives the above-mentioned PDCCH and PDSCH, the UE receives RRC signaling, and the UE determines, based on the RRC signaling, that the above-mentioned PDSCH is associated with one TCI state.

[0064] Method 2: The UE determines that the PDSCH is associated with one TCI state based on the TDRA field in the DCI format corresponding to the PDCCH.

[0065] In this example, according to the method of the embodiment of the present invention, the UE can determine the TCI status of the PDSCH according to the following method.

[0066] Method #1-1: Determine the TCI state of the PDSCH based on the first TCI state for receiving the PDCCH. For example, reception of the PDCCH is based on the TCI state of CORESET #1 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the first TCI state (TCI #1) activated by the MAC-CE for CORESET #1.

[0067] Method #1-2: Determine the TCI state of the PDSCH based on the second TCI state for receiving the PDCCH. For example, reception of the PDCCH is based on the TCI state of CORESET #1 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the second TCI state (TCI #2) activated by the MAC-CE for CORESET #1.

[0068] Method #2-1: Determine the TCI state of the PDSCH based on the TCI state for receiving the smallest ID of the PDCCH. For example, reception of the PDCCH is based on the TCI state of CORESET #1 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI #1) with the smallest ID activated by the MAC-CE for CORESET #1.

[0069] Method #2-2: Determine the TCI state of the PDSCH based on the TCI state for receiving the highest ID of the PDCCH. For example, reception of the PDCCH is based on the TCI state of CORESET #1 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI #2) with the highest ID activated by the MAC-CE for CORESET #1.

[0070] Method #3-1: Determine the TCI state of the PDSCH based on the TCI state applied by the earliest symbol for receiving the PDCCH. For example, if the earliest symbol for receiving the PDCCH is the first symbol of slot n, the TCI state of the PDSCH is determined by the TCI state (TCI#1) applied by the PDCCH at that symbol.

[0071] Method #3-2: Determine the TCI state of the PDSCH based on the TCI state applied by the latest symbol for receiving the PDCCH. For example, if the latest symbol for receiving the PDCCH is the second symbol of slot n, the TCI state of the PDSCH is determined by the TCI state (TCI#2) applied by the PDCCH to that symbol.

[0072] FIG. 3 is another schematic diagram of the mapping relationship between the TCI state of a PDCCH and the TCI state of a single-TCI PDSCH scheduled by the PDCCH.

[0073] As shown in Figure 3, the UE receives PDCCH (control information) in slot n, and the PDCCH schedules PDSCH (channel or signal), where the scheduling offset between PDCCH and PDSCH is equal to or greater than timeDurationForQCL. In this example, assume that SCS=60 kHz and the corresponding UE capability timeDurationForQCL is 7 symbols.

[0074] Furthermore, the DCI format corresponding to this PDCCH does not include a TCI field. The search space for this PDCCH is SS#1. The CORESET corresponding to this search space SS#1 is CORESET#1. CORESET#1 activates two TCI states, namely TCI#1 and TCI#2, by MAC-CE activation signaling. Here, the first TCI state activated by the MAC-CE activation signaling is TCI#1, and the second TCI state activated by the MAC-CE activation signaling is TCI#2. Furthermore, the frequency domain resources of CORESET are divided into two parts, with the TCI state applied to the higher frequency part being TCI#1 and the TCI state applied to the lower frequency part being TCI#2.

[0075] In this example, according to the method of the embodiment of the present invention, the UE can determine that the PDSCH is associated with one TCI state according to the following method 1 or method 2.

[0076] Method 1: Before the UE receives the above-mentioned PDCCH and PDSCH, the UE receives RRC signaling, and the UE determines, based on the RRC signaling, that the above-mentioned PDSCH is associated with one TCI state.

[0077] Method 2: The UE determines that the PDSCH is associated with one TCI state based on the TDRA field in the DCI format corresponding to the PDCCH.

[0078] In this example, according to the method of the embodiment of the present invention, the UE can determine the TCI status of the PDSCH according to the following method.

[0079] Method #1-1: Determine the TCI state of the PDSCH based on the first TCI state for receiving the PDCCH. For example, if the reception of the PDCCH is based on the TCI state of CORESET #1 corresponding to the PDCCH, the TCI state of the PDSCH is determined by the first TCI state (TCI #1) activated for CORESET #1 by the MAC-CE.

[0080] Method #1-2: Determine the TCI state of the PDSCH based on the second TCI state for receiving the PDCCH. For example, if the reception of the PDCCH is based on the TCI state of CORESET #1 corresponding to the PDCCH, the TCI state of the PDSCH is determined by the second TCI state (TCI #2) activated for CORESET #1 by the MAC-CE.

[0081] Method #2-1: Determine the TCI state of the PDSCH based on the TCI state of the smallest ID for receiving the PDCCH. For example, reception of the PDCCH is based on the TCI state of CORESET #1 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI #1) with the smallest ID activated for CORESET #1 by the MAC-CE.

[0082] Method #2-2: Determine the TCI state of the PDSCH based on the TCI state of the highest ID for receiving the PDCCH. For example, reception of the PDCCH is based on the TCI state of CORESET #1 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI #2) with the highest ID activated for CORESET #1 by the MAC-CE.

[0083] Method #3-1: Determine the TCI state (TCI#1) of the PDSCH based on the TCI state (TCI#1) applied by the corresponding highest frequency PRB (e.g., the PRB with the highest ID) among the frequency domain resources used to receive the PDCCH.

[0084] Method #3-2: Determine the TCI state (TCI#2) of the PDSCH based on the TCI state (TCI#2) applied by the PRB with the lowest corresponding frequency (e.g., the PRB with the lowest ID) among the frequency domain resources used to receive the PDCCH.

[0085] Method #4: Determine the TCI state (TCI#2) of the PDSCH based on the TCI state (TCI#2) applied to the PRB with the lowest frequency corresponding to the earliest symbol (e.g., the PRB with the lowest ID) among the time-frequency resources for receiving the PDCCH. For example, if the earliest symbol for receiving the PDCCH is the first symbol of slot n, the TCI state of the PDSCH is determined by the TCI state (TCI#2) applied to the PRB with the lowest frequency corresponding to the PDCCH in that symbol.

[0086] In the above examples of Figures 2 and 3, the PDCCHs are not repetitive. Also, Figure 2 shows a time division multiplexing (TDM) situation, and Figure 3 shows a frequency division multiplexing (FDM) situation.

[0087] FIG. 4 is another schematic diagram of the mapping relationship between the TCI state of a PDCCH and the TCI state of a single-TCI PDSCH scheduled by the PDCCH.

[0088] As shown in Figure 4, the UE receives PDCCH (control information) in slot n, and the PDCCH schedules PDSCH (channel or signal), where the scheduling offset between PDCCH and PDSCH is equal to or greater than timeDurationForQCL. In this example, assume that SCS=60 kHz and the corresponding UE capability timeDurationForQCL is 7 symbols.

[0089] Furthermore, the DCI format corresponding to this PDCCH does not include a TCI field. The PDCCH includes two parts, PDCCH#rep1 and PDCCH#rep2, and PDCCH#rep1 and PDCCH#rep2 correspond to the same DCI bit. The search spaces corresponding to the PDCCH are SS#1 and SS#2, respectively, where SS#1 is located at the first symbol of slot n and SS#2 is located at the third symbol of slot n. For example, the UE knows in advance that SS#1 is associated with SS#2, and SS#1 corresponds to the first SS and SS#2 corresponds to the second SS. The UE can receive a repetition corresponding to one PDCCH in each of these two SSs. Due to the RRC signaling configuration, the CORESETs corresponding to the PDCCHs in search spaces SS#1 and SS#2 are both CORESET#1. CORESET#1 activates two TCI states, namely TCI#1 and TCI#2, by MAC-CE activation signaling, where the first TCI state activated by MAC-CE activation signaling is TCI#1 and SS#2 corresponds to TCI#1, the second TCI state activated by MAC-CE activation signaling is TCI#2 and SS#1 corresponds to TCI#2, and the TCI state applied by the first symbol of slot n is TCI#1 and the TCI state applied by the third symbol of slot n is TCI#2.

[0090] In this example, according to the method of the embodiment of the present invention, the UE can determine that the PDSCH is associated with one TCI state according to the following method 1 or method 2.

[0091] Method 1: Before the UE receives the above-mentioned PDCCH and PDSCH, the UE receives RRC signaling, and the UE determines, based on the RRC signaling, that the above-mentioned PDSCH is associated with one TCI state.

[0092] Method 2: The UE determines that the PDSCH is associated with one TCI state based on the TDRA field in the DCI format corresponding to the PDCCH.

[0093] In this example, according to the method of the embodiment of the present invention, the UE can determine the TCI status of the PDSCH according to the following method.

[0094] Method 1-1: Determine the TCI state of the PDSCH based on the first TCI state for monitoring the PDCCH. For example, monitoring the PDCCH is based on one of two TCI states of CORESET#1 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the first TCI state (TCI#1) activated by the MAC-CE for CORESET#1.

[0095] Method 1-2: Determine the TCI state of the PDSCH based on the second TCI state for monitoring the PDCCH. For example, monitoring the PDCCH is based on one of two TCI states of CORESET#1 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the second TCI state (TCI#2) activated by the MAC-CE for CORESET#1.

[0096] Method 2-1: Determine the TCI state of the PDSCH based on the TCI state with the smallest ID used to monitor the PDCCH. For example, if monitoring of the PDCCH is based on one of two TCI states of CORESET#1 corresponding to the PDCCH, the TCI state of the PDSCH is determined by the TCI state with the smallest ID (TCI#1) activated for CORESET#1 by the MAC-CE.

[0097] Method 2-2: Determine the TCI state of the PDSCH based on the TCI state of the highest ID used to monitor the PDCCH. For example, monitoring the PDCCH is based on one of two TCI states of CORESET#1 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI#2) with the highest ID activated by the MAC-CE for CORESET#1.

[0098] Method 3-1: Determine the TCI state of the PDSCH based on the TCI state of the first SS for monitoring the PDCCH. For example, the monitoring of the PDCCH is based on one of the two SSs corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI#1) of the first SS (SS#1) activated for CORESET#1 by the MAC-CE.

[0099] Method 3-2: Determine the TCI state of the PDSCH based on the TCI state of the second SS for monitoring the PDCCH. For example, the monitoring of the PDCCH is based on one of the two SSs corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI#2) of the second SS (SS#2) activated for CORESET#1 by the MAC-CE.

[0100] Method 4-1: Determine the TCI state of the PDSCH based on the TCI state of the SS with the smallest ID for monitoring the PDCCH. For example, monitoring of the PDCCH is based on one of two SSs corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI#1) of the SS with the smallest ID (SS#1) activated by the MAC-CE for CORESET#1.

[0101] Method 4-2: Determine the TCI state of the PDSCH based on the TCI state for monitoring the SS with the highest ID of the PDCCH. For example, the monitoring of the PDCCH is based on one of two SSs corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI#2) of the SS with the highest ID (SS#2) activated by the MAC-CE for CORESET#1.

[0102] Method 5-1: Determine the TCI state of the PDSCH based on the TCI state (TCI#1) applied by the earliest symbol for monitoring the PDCCH. For example, if the earliest symbol corresponding to monitoring the PDCCH is the first symbol of slot n, the TCI state of the PDSCH is determined by the TCI state applied by the PDCCH to that symbol.

[0103] Method 5-2: Determine the TCI state of the PDSCH based on the TCI state (TCI#2) applied by the latest symbol for monitoring the PDCCH. For example, if the latest symbol corresponding to the PDCCH monitoring is the third symbol of slot n, the TCI state of the PDSCH is determined by the TCI state applied by the PDCCH to that symbol.

[0104] FIG. 5 is another schematic diagram of the mapping relationship between the TCI state of a PDCCH and the TCI state of a single-TCI PDSCH scheduled by the PDCCH.

[0105] As shown in Figure 5, the UE receives PDCCH (control information) in slot n, and the PDCCH schedules PDSCH (channel or signal), where the scheduling offset between PDCCH and PDSCH is equal to or greater than timeDurationForQCL. In this example, assume that SCS=60kHz and the corresponding UE capability timeDurationForQCL is 7 symbols.

[0106] Furthermore, the DCI format corresponding to this PDCCH does not include a TCI field. This PDCCH includes two parts, PDCCH#rep1 and PDCCH#rep2, and PDCCH#rep1 and PDCCH#rep2 correspond to the same DCI bit. The search space corresponding to the PDCCH is SS#1. According to the RRC signaling configuration, search space SS#1 corresponds to CORESET#1 and CORESET#2. For example, the UE knows in advance that CORESET#1 and CORESET#2 are associated, and CORESET#1 corresponds to TCI#2, and CORESET#2 corresponds to TCI#1.

[0107] In this example, according to the method of the embodiment of the present invention, the UE can determine that the PDSCH is associated with one TCI state according to the following method 1 or method 2.

[0108] Method 1: Before the UE receives the above-mentioned PDCCH and PDSCH, the UE receives RRC signaling, and the UE determines, based on the RRC signaling, that the above-mentioned PDSCH is associated with one TCI state.

[0109] Method 2: The UE determines that the PDSCH is associated with one TCI state based on the TDRA field in the DCI format corresponding to the PDCCH.

[0110] In this example, according to the method of the embodiment of the present invention, the UE can determine the TCI status of the PDSCH according to the following method.

[0111] Method 2-1: Determine the TCI state of the PDSCH based on the TCI state with the smallest ID used to monitor the PDCCH. For example, monitoring the PDCCH is based on one of two TCI states of CORESET#1 and CORESET#2 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state with the smallest ID (TCI#1) activated by the MAC-CE for CORESET#1 and CORESET#2.

[0112] Method 2-2: Determine the TCI state of the PDSCH based on the TCI state of the highest ID used to monitor the PDCCH. For example, monitoring the PDCCH is based on one of two TCI states of CORESET#1 and CORESET#2 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI#2) with the highest ID activated by the MAC-CE for CORESET#1 and CORESET#2.

[0113] Method 3-1: Determine the TCI state of the PDSCH based on the TCI state of the first CORESET for monitoring the PDCCH. For example, the monitoring of the PDCCH is based on one of two CORESETs corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI#2) applied to the first CORESET (CORESET#1).

[0114] Method 3-2: Determine the TCI state of the PDSCH based on the TCI state of the second CORESET for monitoring the PDCCH. For example, the monitoring of the PDCCH is based on one of two CORESETs corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI#1) applied to the second CORESET (CORESET#2).

[0115] Method 4-1: Determine the TCI state of the PDSCH based on the TCI state of the CORESET with the smallest ID for monitoring the PDCCH. For example, monitoring of the PDCCH is based on one of two CORESETs corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI#2) applied to the CORESET with the smallest ID (CORESET#1).

[0116] Method 4-2: Determine the TCI state of the PDSCH based on the TCI state of the CORESET with the largest ID for monitoring the PDCCH. For example, monitoring of the PDCCH is based on one of two CORESETs corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI#1) applied to the CORESET with the largest ID (CORESET#2).

[0117] Method 5-1: Determine the TCI state of the PDSCH based on the TCI state (TCI#2) applied by the lowest frequency PRB (e.g., the PRB with the lowest ID) among the frequency domain resources for monitoring the PDCCH.

[0118] Method 5-2: Determine the TCI state of the PDSCH based on the TCI state (TCI#1) applied to the highest frequency PRB (e.g., the PRB with the highest ID) among the frequency domain resources for monitoring the PDCCH described above.

[0119] FIG. 6 is another schematic diagram of the mapping relationship between the TCI state of a PDCCH and the TCI state of a single-TCI PDSCH scheduled by the PDCCH.

[0120] As shown in Figure 6, the UE receives PDCCH (control information) in slot n, and the PDCCH schedules PDSCH (channel or signal), where the scheduling offset between PDCCH and PDSCH is equal to or greater than timeDurationForQCL. In this example, assume that SCS=60 kHz and the corresponding UE capability timeDurationForQCL is 7 symbols.

[0121] Furthermore, the DCI format corresponding to this PDCCH does not include a TCI field. The PDCCH includes two parts, PDCCH#rep1 and PDCCH#rep2, where PDCCH#rep1 and PDCCH#rep2 correspond to the same DCI bit. The search spaces corresponding to the PDCCH are SS#1 and SS#2, respectively, where SS#1 is located at the first symbol of slot n and SS#2 is located at the third symbol of slot n. For example, the UE knows in advance that SS#1 is associated with SS#2, SS#1 corresponds to the first SS, and SS#2 corresponds to the second SS, and can receive the repetition corresponding to the PDCCH in these two SSs. Depending on the configuration of the RRC signaling, the search spaces SS#1 and SS#2 correspond to CORESET#2 and CORESET#1, respectively, e.g., the RRC signaling indicates that CORESET#1 corresponds to the first CORESET and CORESET#2 corresponds to the second CORESET. The TCI state applied by the first symbol of slot n is TCI#1, and the TCI state applied by the third symbol of slot n is TCI#2.

[0122] In this example, according to the method of the embodiment of the present invention, the UE can determine that the PDSCH is associated with one TCI state according to the following method 1 or method 2.

[0123] Method 1: Before the UE receives the above-mentioned PDCCH and PDSCH, the UE receives RRC signaling, and the UE determines, based on the RRC signaling, that the above-mentioned PDSCH is associated with one TCI state.

[0124] Method 2: The UE determines that the PDSCH is associated with one TCI state based on the TDRA field in the DCI format corresponding to the PDCCH.

[0125] In this example, according to the method of the embodiment of the present invention, the UE can determine the TCI status of the PDSCH according to the following method.

[0126] Method 1-1: Determine the TCI state of the PDSCH based on the first TCI state for monitoring the PDCCH. For example, the monitoring of the PDCCH is based on one of two TCI states of CORESET#1 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the first TCI state (TCI#1) activated by the MAC-CE for CORESET#1.

[0127] Method 1-2: Determine the TCI state of the PDSCH based on the second TCI state for monitoring the PDCCH. For example, the monitoring of the PDCCH is based on one of the two TCI states of CORESET#1 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the second TCI state (TCI#2) activated by the MAC-CE for CORESET#1.

[0128] Method 2-1: Determine the TCI state of the PDSCH based on the TCI state with the smallest ID used to monitor the PDCCH. For example, monitoring the PDCCH is based on one of the two TCI states of CORESET#1 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state with the smallest ID (TCI#1) activated by the MAC-CE for CORESET#1.

[0129] Method 2-2: Determine the TCI state of the PDSCH based on the TCI state of the highest ID used to monitor the PDCCH. For example, monitoring the PDCCH is based on one of the two TCI states of CORESET#1 corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI#2) with the highest ID activated by the MAC-CE for CORESET#1.

[0130] Method 3-1: Determine the TCI state of the PDSCH based on the TCI state of the first CORESET for monitoring the PDCCH. For example, the monitoring of the PDCCH is based on the first CORESET of two CORESETs corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI#1) applied by CORESET#1.

[0131] Method 3-2: Determine the TCI state of the PDSCH based on the TCI state of the second CORESET for monitoring the PDCCH. For example, the monitoring of the PDCCH is based on the second CORESET of the two CORESETs corresponding to the PDCCH, and the TCI state of the PDSCH is determined by the TCI state (TCI#2) applied by CORESET#2.

[0132] Method 4-1: Determine the TCI state of the PDSCH based on the TCI state of the CORESET with the smallest ID for monitoring the PDCCH. For example, monitoring the PDCCH is based on the smaller ID of the two CORESETs corresponding to the PDCCHs, and the TCI state of the PDSCH is determined by the TCI state (TCI#1) applied by CORESET#1.

[0133] Method 4-2: Determine the TCI state of the PDSCH based on the TCI state of the CORESET with the largest ID for monitoring the PDCCH. For example, monitoring of the PDCCH is based on the larger ID of the two CORESETs corresponding to the PDCCHs, and the TCI state of the PDSCH is determined by the TCI state (TCI#2) applied by CORESET#2.

[0134] Method 5-1: Determine the TCI state of the PDSCH based on the TCI state (TCI#1) applied by the earliest symbol for monitoring the PDCCH. For example, if the earliest symbol corresponding to the PDCCH monitoring is the first symbol of slot n, the TCI state of the PDSCH is determined by the TCI state applied by the PDCCH to that symbol.

[0135] Method 5-2: Determine the TCI state of the PDSCH based on the TCI state (TCI#2) applied by the latest symbol for monitoring the PDCCH. For example, if the latest symbol corresponding to the PDCCH monitoring is the third symbol of slot n, the TCI state of the PDSCH is determined by the TCI state applied by the PDCCH to that symbol.

[0136] In the above examples of Figures 4 to 6, there is repetition in the PDCCH. Also, in the example of Figure 4, there are two search space sets and one CORESET, in the example of Figure 5, there are one search space set and two CORESETs, and in the example of Figure 6, there are two search space sets and two CORESETs.

[0137] FIG. 7 is a schematic diagram of a mapping relationship between the TCI states of a PDCCH and the TCI states of a multi-TCI PDSCH scheduled by the PDCCH.

[0138] As shown in Figure 7, in slot n, the UE receives PDCCH (control information) associated with two TCI states, and the PDCCH schedules PDSCH (channel or signal), where the scheduling offset between the PDCCH and PDSCH is equal to or greater than timeDurationForQCL. In this example, assume that SCS=60 kHz and the corresponding UE capability timeDurationForQCL is 7 symbols.

[0139] Furthermore, the DCI format corresponding to this PDCCH does not include a TCI field. The search space for this PDCCH is SS#1. The CORESET corresponding to search space SS#1 is CORESET#1. CORESET#1 activates two TCI states, namely TCI#1 and TCI#2, by MAC-CE activation signaling, where the first TCI state activated by the MAC-CE activation signaling is TCI#1 and the second TCI state activated by the MAC-CE activation signaling is TCI#2. The TCI state applied by the first symbol of slot n is TCI#1 and the TCI state applied by the second symbol of slot n is TCI#2.

[0140] In this example, according to the method of the embodiment of the present invention, the UE can determine that the PDSCH is associated with two TCI states according to the following method 1 or method 2.

[0141] Method 1: Before the UE receives the above-mentioned PDCCH and PDSCH, the UE receives RRC signaling, and the UE determines, based on the RRC signaling, that the above-mentioned PDSCH is associated with two TCI states.

[0142] Method 2: The UE determines that the above-mentioned PDSCH is associated with two TCI states based on the TDRA field in the DCI format corresponding to the above-mentioned PDCCH.

[0143] In this example, according to the method of the embodiment of the present invention, the UE can determine the TCI status of Rep#1 of the PDSCH according to the following method.

[0144] Method 1-1: Determine the TCI state of Rep#1 of the PDSCH based on the first TCI state for receiving the PDCCH. For example, reception of the PDCCH is based on the TCI state of CORESET#1 corresponding to the PDCCH, and the TCI state of Rep#1 of the PDSCH is determined by the first TCI state (TCI#1) activated for CORESET#1 by the MAC-CE.

[0145] Method 1-2: Determine the TCI state of Rep#1 of the PDSCH based on the second TCI state for receiving the PDCCH. For example, reception of the PDCCH is based on the TCI state of CORESET#1 corresponding to the PDCCH, and the TCI state of Rep#1 of the PDSCH is determined by the second TCI state (TCI#2) activated for CORESET#1 by the MAC-CE.

[0146] Method 2-1: Determine the TCI state of Rep#1 of PDSCH based on the TCI state of the smallest ID for receiving the PDCCH. For example, reception of the PDCCH is based on the TCI state of CORESET#1 corresponding to the PDCCH, and the TCI state of Rep#1 of PDSCH is determined by the TCI state (TCI#1) of the smallest ID activated by the MAC-CE for CORESET#1.

[0147] Method 2-2: Determine the TCI state of Rep#1 of the PDSCH based on the TCI state of the highest ID for receiving the PDCCH. For example, reception of the PDCCH is based on the TCI state of CORESET#1 corresponding to the PDCCH, and the TCI state of Rep#1 of the PDSCH is determined by the TCI state (TCI#2) with the highest ID activated by the MAC-CE for CORESET#1.

[0148] Method 3-1: Determine the TCI state of Rep#1 of the PDSCH based on the TCI state (TCI#1) applied by the earliest symbol for receiving the PDCCH. For example, if the earliest symbol for receiving the PDCCH is the first symbol of slot n, the TCI state of Rep#1 of the PDSCH is determined by the TCI state that the PDCCH applies to that symbol.

[0149] Method 3-2: Determine the TCI state of Rep#1 of the PDSCH based on the TCI state (TCI#2) applied by the latest symbol for receiving the PDCCH. For example, if the latest symbol for receiving the PDCCH is the second symbol of slot n, the TCI state of Rep#1 of the PDSCH is determined by the TCI state that the PDCCH applies to that symbol.

[0150] In this example, according to the method of the embodiment of the present invention, the UE can determine the TCI status of Rep#2 of the PDSCH according to the following method.

[0151] Since the TCI states corresponding to the above PDCCH are TCI#1 and TCI#2, after the UE determines the TCI state of Rep#1 of the PDSCH according to the above method, it can select a TCI state from TCI#1 and TCI#2 that is not for Rep#1 of the PDSCH as the TCI state of Rep#2 for the PDSCH.

[0152] For example, if the TCI state of PDSCH Rep#1 is determined to be TCI#1 according to the above method 1-1, the TCI state of PDSCH Rep#2 is determined to be TCI#2.

[0153] Furthermore, for example, if the TCI state of PDSCH Rep#1 is determined to be TCI#2 according to the above method 1-2, the TCI state of PDSCH Rep#2 is determined to be TCI#1.

[0154] The same applies to other cases, and the explanations thereof will be omitted here.

[0155] In the example of Figure 7, the PDCCHs are not overlapped, but the PDSCHs are overlapped. Also, Figure 7 shows the case of TDM, but the case of FDM is similar to TDM and can be inferred from the method of Figure 3, so the description thereof will be omitted here.

[0156] FIG. 8 is another schematic diagram of the mapping relationship between the TCI states of a PDCCH and the TCI states of a multi-TCI PDSCH scheduled by the PDCCH.

[0157] As shown in Figure 8, the UE receives PDCCH (control information) in slot n, and the PDCCH schedules PDSCH (channel or signal), where the scheduling offset between PDCCH and PDSCH is equal to or greater than timeDurationForQCL. In this example, assume that SCS=60kHz and the corresponding UE capability timeDurationForQCL is 7 symbols.

[0158] Furthermore, the DCI format corresponding to this PDCCH does not include a TCI field. The PDCCH includes two parts, PDCCH#rep1 and PDCCH#rep2, where PDCCH#rep1 and PDCCH#rep2 correspond to the same DCI bit. The search spaces corresponding to the PDCCH are SS#1 and SS#2, respectively, with SS#1 located at the first symbol of slot n and SS#2 located at the third symbol of slot n. For example, the UE knows in advance that SS#1 is associated with SS#2, and SS#1 corresponds to the first SS and SS#2 corresponds to the second SS, and can receive the repetitions corresponding to the PDCCH in these two SSs. Due to the configuration of RRC signaling, the CORESETs corresponding to search spaces SS#1 and SS#2 are both CORESET#1. This CORESET#1 activates two TCI states, namely TCI#1 and TCI#2, by MAC-CE activation signaling, where the first TCI state activated by MAC-CE activation signaling is TCI#1, where SS#2 corresponds to TCI#1. The second TCI state activated by MAC-CE activation signaling is TCI#2, where SS#1 corresponds to TCI#2. Also, the TCI state applied by the first symbol of slot n is TCI#1, and the TCI state applied by the third symbol of slot n is TCI#2.

[0159] In this example, according to the method of the embodiment of the present invention, the UE can determine that the PDSCH is associated with two TCI states according to the following method 1 or method 2.

[0160] Method 1: Before the UE receives the above-mentioned PDCCH and PDSCH, the UE receives RRC signaling, and the UE determines, based on the RRC signaling, that the above-mentioned PDSCH is associated with two TCI states.

[0161] Method 2: The UE determines that the PDSCH is associated with two TCI states based on the TDRA field in the DCI format corresponding to the PDCCH.

[0162] In this example, according to the method of the embodiment of the present invention, the UE can determine the TCI status of Rep#1 of the PDSCH according to the following method.

[0163] Method 1-1: Determine the TCI state of Rep#1 of PDSCH based on the first TCI state for monitoring the PDCCH. For example, monitoring the PDCCH is based on one of two TCI states of CORESET#1 corresponding to the PDCCH, and the TCI state of Rep#1 of PDSCH is determined by the first TCI state (TCI#1) activated for CORESET#1 by the MAC-CE.

[0164] Method 1-2: Determine the TCI state of PDSCH Rep#1 based on the second TCI state for monitoring the PDCCH. For example, the monitoring of the PDCCH is based on one of the two TCI states of CORESET#1 corresponding to the PDCCH, and the TCI state of PDSCH Rep#1 is determined by the second TCI state (TCI#2) activated for CORESET#1 by the MAC-CE.

[0165] Method 2-1: Determine the TCI state of PDSCH Rep#1 based on the TCI state with the smallest ID used to monitor the PDCCH. For example, monitoring of the PDCCH is based on one of the two TCI states of CORESET#1 corresponding to the PDCCH, and the TCI state of PDSCH Rep#1 is determined by the TCI state with the smallest ID (TCI#1) activated for CORESET#1 by the MAC-CE.

[0166] Method 2-2: Determine the TCI state of PDSCH Rep#1 based on the TCI state of the highest ID used to monitor the PDCCH. For example, the monitoring of the PDCCH is based on one of the two TCI states of CORESET#1 corresponding to the PDCCH, and the TCI state of PDSCH Rep#1 is determined by the TCI state (TCI#2) with the highest ID activated by the MAC-CE for CORESET#1.

[0167] Method 3-1: Determine the TCI state of PDSCH Rep#1 based on the TCI state for monitoring the first SS of the PDCCH. For example, the monitoring of the PDCCH is based on one of the two SSs corresponding to the PDCCH, and the TCI state of PDSCH Rep#1 is determined by the TCI state (TCI#2) of the first SS (SS#1) activated by the MAC-CE for CORESET#1.

[0168] Method 3-2: Determine the TCI state of PDSCH Rep#1 based on the TCI state of the second SS for monitoring the PDCCH. For example, the monitoring of the PDCCH is based on one of the two SSs corresponding to the PDCCH, and the TCI state of PDSCH Rep#1 is determined by the TCI state (TCI#1) of the second SS (SS#2) activated by the MAC-CE for CORESET#1.

[0169] Method 4-1: Determine the TCI state of PDSCH Rep#1 based on the TCI state of the SS with the smallest ID for monitoring the PDCCH. For example, the monitoring of the PDCCH is based on one of the two SSs corresponding to the PDCCH, and the TCI state of PDSCH Rep#1 is determined by the TCI state (TCI#2) of the SS (SS#1) with the smallest ID activated by the MAC-CE for CORESET#1.

[0170] Method 4-2: Determine the TCI state of PDSCH Rep#1 based on the TCI state of the SS with the highest ID for monitoring the PDCCH. For example, monitoring of the PDCCH is based on one of the two SSs corresponding to the PDCCH, and the TCI state of PDSCH Rep#1 is determined by the TCI state (TCI#2) of the SS with the highest ID (SS#2) activated by the MAC-CE for CORESET#1.

[0171] Method 5-1: Determine the TCI state of PDSCH Rep#1 based on the TCI state (TCI#1) applied by the earliest symbol for monitoring the PDCCH. For example, if the earliest symbol corresponding to the PDCCH monitoring is the first symbol of slot n, the TCI state of PDSCH Rep#1 is determined by the TCI state that the PDCCH applies to that symbol.

[0172] Method 5-2: Determine the TCI state of PDSCH Rep#1 based on the TCI state (TCI#2) applied by the latest symbol for monitoring the PDCCH. For example, if the latest symbol corresponding to the above PDCCH monitoring is the third symbol of slot n, the TCI state of PDSCH Rep#1 is determined by the TCI state that the PDCCH applies to that symbol.

[0173] In this example, according to the method of the embodiment of the present invention, the UE can determine the TCI status of Rep#2 of the PDSCH according to the following method.

[0174] Since the TCI states corresponding to the above PDCCH are TCI#1 and TCI#2, after the UE determines the TCI state of Rep#1 for the PDSCH according to the above method, it can select a TCI state other than Rep#1 for the PDSCH from TCI#1 and TCI#2 as the TCI state of Rep#2 for the PDSCH.

[0175] For example, if the TCI state of PDSCH Rep#1 is determined to be TCI#1 according to the above method 1-1, the TCI state of PDSCH Rep#2 is determined to be TCI#2.

[0176] Furthermore, for example, if the TCI state of PDSCH Rep#1 is determined to be TCI#2 according to the above method 1-2, the TCI state of PDSCH Rep#2 is determined to be TCI#1.

[0177] The same applies to other cases, and the explanations thereof will be omitted here.

[0178] In the example of Figure 8, the PDCCH and the PDSCH overlap. Also, Figure 8 shows the case of two search space sets and one CORESET, and the cases of one search space set and two CORESETs and two search space sets and two CORESETs are similar to the case of two search space sets and one CORESET, and analogies according to the techniques of Figures 5 and 6 are possible, so descriptions thereof will be omitted here.

[0179] Although the above description is given with reference to FIG. 1, the present invention is not limited to this example. For example, the execution order of each operation may be appropriately adjusted, some other operations may be added, or some of these operations may be deleted. Those skilled in the art will be able to make appropriate modifications to the above content without being limited to the description of FIG. 1.

[0180] As described above, the method of the embodiment of the present invention can avoid ambiguity in the TCI status of the channel or signal and reduce the overhead caused by indicating the TCI status of the channel or signal in the control information.

[0181] <Example 2> An embodiment of the present invention provides a wireless communication method, which is explained from the network device side.

[0182] 9 is a schematic diagram of a wireless communication method according to embodiment 2 of the present invention. As shown in FIG. 9, the method includes the following steps:

[0183] Step 901: A network device transmits control information related to two TCI states, and the DCI format corresponding to the control information includes a TCI field.

[0184] In an embodiment of the present invention, when control information is related to two TCI states, the DCI format corresponding to the control information includes a TCI field.

[0185] In an embodiment of the present invention, the control information triggers a channel or signal, which may be a downlink channel or signal, such as a PDSCH or a CSI-RS, or an uplink channel or signal, such as a PUSCH, a PUCCH, and / or an SRS, etc. The present invention is not limited thereto.

[0186] In an embodiment of the present invention, the TCI state of the channel or signal is indicated by the TCI field corresponding to the DCI format of the control information, for example, whether the channel or signal is associated with one TCI state or two TCI states is indicated by the TCI field.

[0187] According to the method of the embodiment of the present invention, when control information triggers a channel or a signal, if the control information is associated with two TCI states, the control information includes a TCI field, and according to this method, the control information always includes a TCI field, and the TCI state of the signal or channel triggered by the control information is indicated by the included TCI field, thereby clarifying the TCI state of the signal or channel and enabling more flexible indication of the TCI state of the signal or channel.

[0188] In some aspects, the control information is associated with two TCI states, meaning that the transmission of the control information is associated with two TCI states.

[0189] In some aspects, the inclusion of a TCI field in a DCI format corresponding to control information means that the network device enables the parameter tci-PresentInDCI of a control resource set associated with the DCI format, or that the network device enables the parameter tci-PresentInDCI of all control resource sets associated with the DCI format, or that the network device configures the parameter tci-PresentInDCI-ForFormat1_2 of a control resource set associated with the DCI format, or that the network device configures the parameter tci-PresentInDCI-ForFormat1_2 of all control resource sets associated with the DCI format.

[0190] For example, the above condition may be written in English as follows:

[0191] [Table 1] The following describes the method of the present invention with reference to some specific examples.

[0192] Figure 10 is a schematic diagram of a mapping relationship between the TCI state of a PDCCH and the TCI state of a single-TCI PDSCH scheduled by the PDCCH. Figure 10 is explained from the perspective of base station transmission, and takes the PDSCH as an example.

[0193] As shown in Figure 10, the gNB transmits a PDCCH (control information) in slot n, which schedules a PDSCH (channel or signal), and the PDSCH is associated with one TCI state, where the scheduling offset between the PDCCH and the PDSCH is equal to or greater than timeDurationForQCL. In this example, assume that SCS=60 kHz and the corresponding UE capability timeDurationForQCL is 7 symbols.

[0194] Furthermore, the DCI format corresponding to the PDCCH includes a TCI field, and for example, the DCI format is DCI format 1_1, and the CORESET (CORESET#1) corresponding to the DCI format is configured with one IE, namely, tci-PresentInDCI. Also, tci-PresentInDCI is set to "enable". As another example, the DCI format is DCI format 1_2, and the CORESET (CORESET#1) corresponding to the DCI format is configured with one IE, namely, tci-PresentForDCI-Format1-2.

[0195] Furthermore, the TCI codepoint indicated by the TCI field of the PDCCH includes one TCI state, namely TCI#3.

[0196] Furthermore, the corresponding search space of this PDCCH is SS#1. The CORESET corresponding to this search space SS#1 is CORESET#1. CORESET#1 activates two TCI states, namely TCI#1 and TCI#2, by MAC-CE activation signaling, where the first TCI state activated by the MAC-CE activation signaling is TCI#1 and the second TCI state activated by the MAC-CE activation signaling is TCI#2. Furthermore, the TCI state applied by the first symbol of slot n is TCI#1 and the TCI state applied by the second symbol of slot n is TCI#2.

[0197] In this example, when a gNB transmits a DCI format for scheduling a PDSCH and the DCI format is associated with two TCI states (or when this DCI format is transmitted via two TRPs), the DCI format needs to include a TCI field to avoid ambiguity in the TCI state of the PDSCH scheduled by the DCI format. Also, in this example, the TCI field indicates one TCI state, i.e., TCI#3, which is the TCI state applied by the PDSCH scheduled by the DCI format.

[0198] Figure 11 is a schematic diagram of a mapping relationship between the TCI state of a PDCCH and the TCI state of a multi-TCI PDSCH scheduled by the PDCCH. Figure 11 is explained from the perspective of base station transmission, and takes the PDSCH as an example.

[0199] As shown in Figure 11, the gNB transmits a PDCCH (control information) in slot n, which schedules a PDSCH (channel or signal), and this PDSCH is associated with one TCI state, where the scheduling offset between the PDCCH and the PDSCH is equal to or greater than timeDurationForQCL. In this example, assume that SCS=60 kHz and the corresponding UE capability timeDurationForQCL is 7 symbols.

[0200] Furthermore, the DCI format corresponding to the PDCCH includes a TCI field. For example, the DCI format is DCI format 1_1, and the CORESET (CORESET#1) corresponding to the DCI format is configured with one IE, namely, tci-PresentInDCI. Also, tci-PresentInDCI is set to "enable." As another example, the DCI format is DCI format 1_2, and the CORESET (CORESET#1) corresponding to the DCI format is configured with one IE, namely, tci-PresentForDCI-Format1-2.

[0201] Furthermore, the TCI codepoint indicated by the TCI field of the PDCCH includes two TCI states, namely TCI#3 and TCI#4.

[0202] Furthermore, the corresponding search space of this PDCCH is SS#1. The CORESET corresponding to this search space SS#1 is CORESET#1. CORESET#1 activates two TCI states, namely TCI#1 and TCI#2, by MAC-CE activation signaling, where the first TCI state activated by the MAC-CE activation signaling is TCI#1 and the second TCI state activated by the MAC-CE activation signaling is TCI#2. Furthermore, the TCI state applied by the first symbol of slot n is TCI#1 and the TCI state applied by the second symbol of slot n is TCI#2.

[0203] In this example, when a gNB transmits a DCI format for scheduling a PDSCH and the DCI format is associated with two TCI states (or when this DCI format is transmitted via two TRPs), the DCI format needs to include a TCI field to avoid ambiguity in the TCI state of the PDSCH scheduled by the DCI format. Furthermore, in this example, the TCI field indicates two TCI states, namely, TCI#3 and TCI#4, which are TCI states applied by the PDSCH scheduled by the DCI format.

[0204] Although the above has outlined an embodiment of the present invention with reference to Figure 9, the present invention is not limited to this. For example, the execution order of each operation may be appropriately adjusted, some other operations may be added, or some of these operations may be deleted. Those skilled in the art will be able to make appropriate modifications to the above content without being limited to the description of Figure 9.

[0205] According to the method of an embodiment of the present invention, as described above, when control information relates to two TCI states, the TCI state of the signal or channel indicated by the control information can be clarified, and the TCI state of the signal or channel can be indicated more flexibly.

[0206] Example 3 The present embodiment of the present invention provides a wireless communication method, which will be described from the terminal device side. This method is a terminal device-side process corresponding to the method of the second embodiment, and the description of the same content as the second embodiment will be omitted.

[0207] 12 is a schematic diagram of a wireless communication method according to embodiment 3 of the present invention. As shown in FIG. 12, the method includes the following steps:

[0208] Step 1201: A terminal device receives control information related to two TCI states, and the DCI format corresponding to the control information includes a TCI field.

[0209] In an embodiment of the present invention, when the control information is related to two TCI states, the DCI format corresponding to the control information includes a TCI field.

[0210] In an embodiment of the present invention, the control information triggers a channel or signal, which may be a downlink channel or signal, such as a PDSCH or a CSI-RS, or an uplink channel or signal, such as a PUSCH, a PUCCH, and / or an SRS, etc. The present invention is not limited thereto.

[0211] In an embodiment of the present invention, the TCI state of the channel or signal is indicated by the TCI field corresponding to the DCI format of the control information, for example, whether the channel or signal is associated with one TCI state or two TCI states is indicated by the TCI field.

[0212] According to the method of the embodiment of the present invention, when control information triggers a channel or a signal, if the control information is associated with two TCI states, the control information includes a TCI field, and according to this method, the control information always includes a TCI field, and the TCI state of the signal or channel triggered by the control information is indicated by the included TCI field, thereby clarifying the TCI state of the signal or channel and enabling more flexible indication of the TCI state of the signal or channel.

[0213] In some aspects, the control information is associated with two TCI states, meaning that the reception or monitoring of the control information is associated with two TCI states.

[0214] In some aspects, the fact that a DCI format corresponding to control information includes a TCI field means that the terminal device expects the parameter tci-PresentInDCI of a control resource set associated with the DCI format to be enabled, or that the terminal device expects the parameter tci-PresentInDCI of all control resource sets associated with the DCI format to be enabled, or that the terminal device expects the parameter tci-PresentInDCI-ForFormat1_2 of a control resource set associated with the DCI format to be configured, or that the terminal device expects the parameter tci-PresentInDCI-ForFormat1_2 of all control resource sets associated with the DCI format to be configured.

[0215] For example, the above condition may be written in English as follows:

[0216] [Table 2] The following describes the method of the present invention with reference to some specific examples.

[0217] 13 is a schematic diagram of a mapping relationship between the TCI state of a PDCCH and the TCI state of a single-TCI PDSCH scheduled by the PDCCH. This diagram is explained from the perspective of user equipment (UE) reception and transmission, and takes the PDSCH as an example.

[0218] As shown in Figure 13, the UE receives a PDCCH (control information) in slot n, which schedules a PDSCH (channel or signal), and the PDSCH is associated with one TCI state, where the scheduling offset between the PDCCH and the PDSCH is equal to or greater than timeDurationForQCL. In this example, assume that SCS=60 kHz and the corresponding UE capability timeDurationForQCL is 7 symbols.

[0219] Furthermore, the DCI format corresponding to the PDCCH includes a TCI field, and for example, the DCI format is DCI format 1_1, and the CORESET (CORESET#1) corresponding to the DCI format is configured with one IE, namely, tci-PresentInDCI. Also, tci-PresentInDCI is set to "enable". As another example, the DCI format is DCI format 1_2, and the CORESET (CORESET#1) corresponding to the DCI format is configured with one IE, namely, tci-PresentForDCI-Format1-2.

[0220] Furthermore, the TCI codepoint indicated by the TCI field of the PDCCH includes one TCI state, namely TCI#3.

[0221] Furthermore, the corresponding search space of this PDCCH is SS#1. The CORESET corresponding to this search space SS#1 is CORESET#1. CORESET#1 activates two TCI states, namely TCI#1 and TCI#2, by MAC-CE activation signaling, where the first TCI state activated by the MAC-CE activation signaling is TCI#1 and the second TCI state activated by the MAC-CE activation signaling is TCI#2. Furthermore, the TCI state applied by the first symbol of slot n is TCI#1 and the TCI state applied by the second symbol of slot n is TCI#2.

[0222] In this example, when a UE receives a DCI format for scheduling a PDSCH and the DCI format is associated with two TCI states (or passes through two TRPs), the DCI format must include a TCI field. That is, the UE expects the DCI format to include a TCI field. Also, in this example, the TCI field indicates one TCI state, namely, TCI#3, which is the TCI state applied to the PDSCH scheduled by the DCI format.

[0223] 14 is a schematic diagram of a mapping relationship between the TCI state of a PDCCH and the TCI state of a multi-TCI PDSCH scheduled by the PDCCH. This diagram is explained from the perspective of reception by a user equipment (UE), and takes the PDSCH as an example.

[0224] As shown in Figure 14, the UE receives a PDCCH (control information) in slot n, which schedules a PDSCH (channel or signal), and this PDSCH is associated with one TCI state, where the scheduling offset between the PDCCH and the PDSCH is equal to or greater than timeDurationForQCL. In this example, assume that SCS=60 kHz and the corresponding UE capability timeDurationForQCL is 7 symbols.

[0225] Furthermore, the DCI format corresponding to the PDCCH includes a TCI field. For example, the DCI format is DCI format 1_1, and the CORESET (CORESET#1) corresponding to the DCI format is configured with one IE, namely, tci-PresentInDCI. Also, tci-PresentInDCI is set to "enable." As another example, the DCI format is DCI format 1_2, and the CORESET (CORESET#1) corresponding to the DCI format is configured with one IE, namely, tci-PresentForDCI-Format1-2.

[0226] Furthermore, the TCI codepoint indicated by the TCI field of the PDCCH includes two TCI states, namely TCI#3 and TCI#4.

[0227] Furthermore, the corresponding search space of this PDCCH is SS#1. The CORESET corresponding to this search space SS#1 is CORESET#1. CORESET#1 activates two TCI states, namely TCI#1 and TCI#2, by MAC-CE activation signaling, where the first TCI state activated by the MAC-CE activation signaling is TCI#1 and the second TCI state activated by the MAC-CE activation signaling is TCI#2. Furthermore, the TCI state applied by the first symbol of slot n is TCI#1 and the TCI state applied by the second symbol of slot n is TCI#2.

[0228] In this example, when a UE receives a DCI format for scheduling a PDSCH and the DCI format is associated with two TCI states (or passes through two TRPs), the DCI format must include a TCI field. That is, the UE expects the DCI format to include a TCI field. Also, in this example, the TCI field indicates two TCI states, namely, TCI#3 and TCI#4, which are TCI states applied by the PDSCH scheduled by the DCI format.

[0229] Although the above has outlined an embodiment of the present invention with reference to Figure 12, the present invention is not limited to this. For example, the execution order of each operation may be appropriately adjusted, some other operations may be added, or some of these operations may be deleted. Those skilled in the art will be able to make appropriate modifications to the above content without being limited to the description of Figure 12.

[0230] According to the method of an embodiment of the present invention, as described above, when control information relates to two TCI states, the TCI state of the signal or channel indicated by the control information can be clarified, and the TCI state of the signal or channel can be indicated more flexibly.

[0231] Example 4 An embodiment of the present invention provides a wireless communication device, which may be, for example, a terminal device or an element or component configured in a terminal device.

[0232] 15 is a schematic diagram of a wireless communication device according to Example 4 of the present invention. The solution principle of the device is similar to that of the method of Example 1, so that the specific implementation of the device may refer to the implementation of the method of Example 1, and the overlapping content will not be described again.

[0233] As shown in FIG. 15, a wireless communication device 1500 according to an embodiment of the present invention includes a receiving unit 1501 and a processing unit 1502.

[0234] The receiver 1501 receives control information that triggers a channel or signal. Reception or monitoring of the control information is associated with two TCI states, and the DCI format corresponding to the control information does not include a TCI field.

[0235] The processing unit 1502 transmits or receives a channel or signal based on one of the two TCI states or two TCI states.

[0236] In an embodiment of the present invention, the channel or signal is a downlink channel or signal or an uplink channel or signal, the downlink channel or signal is a PDSCH or a CSI-RS, and the uplink channel or signal is at least one of a PUSCH, a PUCCH, and an SRS.

[0237] In some aspects, one of the two TCI states is at least one of: a first TCI state indicated by a MAC-CE command among the TCI states of a control resource set (CORESET) for receiving or monitoring control information; a TCI state with the lowest ID among the TCI states of a control resource set (CORESET) for receiving or monitoring control information; a TCI state applied by a first control resource set indicated by RRC signaling among two control resource sets for receiving or monitoring control information; a TCI state applied by a control resource set with the lowest ID among two control resource sets for receiving or monitoring control information; a TCI state corresponding to a first search space set indicated by RRC signaling among two search space sets for receiving or monitoring control information; a TCI state corresponding to a search space set with the lowest ID among two search space sets for receiving or monitoring control information; and a TCI state applied by a time-frequency resource for receiving or monitoring control information.

[0238] In some aspects, the time-frequency resource for receiving or monitoring the control information is one of the earliest symbol for receiving or monitoring the control information, the PRB with the lowest index for receiving or monitoring the control information, and the PRB with the lowest index in the earliest symbol for receiving or monitoring the control information.

[0239] In some aspects, the channel or signal is a PDSCH, and the PDSCH is associated with a first TCI state, and the first TCI state is at least one of: a first TCI state indicated by a MAC-CE command among TCI states of a control resource set (CORESET) for receiving or monitoring control information; a TCI state with the lowest ID among TCI states of a control resource set (CORESET) for receiving or monitoring control information; a TCI state applied by a first control resource set indicated by RRC signaling among two control resource sets for receiving or monitoring control information; a TCI state applied by a control resource set with the lowest ID among two control resource sets for receiving or monitoring control information; a TCI state corresponding to a first search space set indicated by RRC signaling among two search space sets for receiving or monitoring control information; a TCI state corresponding to a search space set with the lowest ID among two search space sets for receiving or monitoring control information; and a TCI state applied by a time-frequency resource for receiving or monitoring control information.

[0240] In some aspects, the time-frequency resource for receiving or monitoring the control information is one of the earliest symbol for receiving or monitoring the control information, the PRB with the lowest index for receiving or monitoring the control information, and the PRB with the lowest index in the earliest symbol for receiving or monitoring the control information.

[0241] In some aspects, the PDSCH is further associated with a second TCI state, the second TCI state being a TCI state other than the first TCI state of the two TCI states.

[0242] In some aspects, the processing unit 1502 determines to transmit or receive a channel or signal based on two TCI states based on RRC signaling or a DCI field in a DCI format.

[0243] In some aspects, the processing unit 1502 determines to transmit or receive a channel or signal based on one of two TCI states based on RRC signaling or a DCI field in a DCI format.

[0244] In some aspects, the DCI field of the DCI format is the TDRA field of the DCI format.

[0245] In some aspects, RRC signaling is used to indicate whether a channel or signal is associated with one TCI state or two TCI states, whereby the terminal device determines based on the RRC signaling whether to transmit or receive a channel or signal based on two TCI states or one of the two TCI states.

[0246] In some aspects, the time offset between the control information and the channel or signal is equal to or greater than a pre-determined time period.

[0247] Although the above description only describes the components or modules related to the present invention, the present invention is not limited thereto. The wireless communication device 1500 according to the embodiment of the present invention may include other components or modules, and reference may be made to related art for specific details of these components or modules.

[0248] 15 only exemplifies the connections or signal flows between the components or modules, but a person skilled in the art may employ various related technologies such as bus connections. The various components or modules described above may be implemented by hardware devices such as a processor, memory, transmitter, and receiver, but the present invention is not limited to such implementations.

[0249] According to the device of the embodiment of the present invention, as in the first embodiment, it is possible to avoid the TCI status of the channel or signal becoming unclear and to reduce the overhead caused by indicating the TCI status of the channel or signal in the control information.

[0250] <Example 5> An embodiment of the present invention provides a wireless communication device, which may be, for example, a network device or an element or component configured in a network device.

[0251] 16 is a schematic diagram of a wireless communication device according to Example 5 of the present invention. The solution principle of the device is similar to that of the method of Example 2, so that the specific implementation of the device may refer to the implementation of the method of Example 2, and the overlapping content will not be described again.

[0252] As shown in FIG. 16, a wireless communication device 1600 according to an embodiment of the present invention includes a transmitter 1601 .

[0253] The transmitter 1601 transmits control information related to two TCI states. The DCI format corresponding to the control information includes a TCI field.

[0254] In some aspects, if the control information is associated with two TCI states, the DCI format corresponding to the control information includes a TCI field.

[0255] In some aspects, the control information triggers a channel or signal.

[0256] In an embodiment of the present invention, the channel or signal is a downlink channel or signal or an uplink channel or signal, the downlink channel or signal is a PDSCH or a CSI-RS, and the uplink channel or signal is at least one of a PUSCH, a PUCCH, and an SRS.

[0257] In some aspects, the TCI state of a channel or signal is indicated by a TCI field, for example, whether the channel or signal is associated with one TCI state or two TCI states.

[0258] In some aspects, the control information is associated with two TCI states, meaning that the transmission of the control information is associated with two TCI states.

[0259] In some aspects, the DCI format corresponding to the control information including a TCI field means that the network device enables the parameter tci-PresentInDCI of the control resource set associated with the DCI format, or that the network device enables the parameter tci-PresentInDCI of all control resource sets associated with the DCI format, or that the network device configures the parameter tci-PresentInDCI-ForFormat1_2 of the control resource set associated with the DCI format, or that the network device configures the parameter tci-PresentInDCI-ForFormat1_2 of all control resource sets associated with the DCI format.

[0260] Although the above description only describes the components or modules related to the present invention, the present invention is not limited thereto. The wireless communication device 1600 according to the embodiment of the present invention may include other components or modules, and reference may be made to related art for specific details of these components or modules.

[0261] 16 only exemplifies the connections or signal flows between the components or modules, but a person skilled in the art may employ various related technologies such as bus connections. The various components or modules described above may be implemented by hardware devices such as a processor, memory, transmitter, and receiver, but the implementation of the present invention is not limited thereto.

[0262] According to the device of the embodiment of the present invention, as in the second embodiment, when the control information relates to two TCI states, the TCI state of the signal or channel indicated by the control information can be clarified, and the TCI state of the signal or channel can be indicated more flexibly.

[0263] Example 6 An embodiment of the present invention provides a wireless communication device, which may be, for example, a terminal device or an element or component configured in a terminal device.

[0264] 17 is a schematic diagram of a wireless communication device according to Example 6 of the present invention. The solution principle of the device is similar to that of the method of Example 3, so the specific implementation may refer to the implementation of the method of Example 3, and the overlapping content will not be described again.

[0265] As shown in FIG. 17, a wireless communication device 1700 according to an embodiment of the present invention includes a receiving unit 1701.

[0266] The receiver 1701 receives control information related to two TCI states. The DCI format corresponding to the control information includes a TCI field.

[0267] In some aspects, if the control information is associated with two TCI states, the DCI format corresponding to the control information includes a TCI field.

[0268] In some aspects, the control information triggers a channel or signal.

[0269] In an embodiment of the present invention, the channel or signal is a downlink channel or signal or an uplink channel or signal, the downlink channel or signal is a PDSCH or a CSI-RS, and the uplink channel or signal is at least one of a PUSCH, a PUCCH, and an SRS.

[0270] In some aspects, the TCI state of a channel or signal is indicated by a TCI field, for example, whether the channel or signal is associated with one TCI state or two TCI states.

[0271] In some aspects, the control information is associated with two TCI states, meaning that the transmission of the control information is associated with two TCI states.

[0272] In some aspects, the fact that a DCI format corresponding to control information includes a TCI field means that the terminal device expects the parameter tci-PresentInDCI of a control resource set associated with the DCI format to be enabled, or that the terminal device expects the parameter tci-PresentInDCI of all control resource sets associated with the DCI format to be enabled, or that the terminal device expects the parameter tci-PresentInDCI-ForFormat1_2 of a control resource set associated with the DCI format to be configured, or that the terminal device expects the parameter tci-PresentInDCI-ForFormat1_2 of all control resource sets associated with the DCI format to be configured.

[0273] Although the above description only describes the components or modules related to the present invention, the present invention is not limited thereto. The wireless communication device 1700 according to the embodiment of the present invention may include other components or modules, and reference may be made to related art for specific details of these components or modules.

[0274] 17 only exemplifies the connections or signal flows between the components or modules, but a person skilled in the art may employ various related technologies such as bus connections. The various components or modules described above may be implemented by hardware devices such as a processor, memory, transmitter, and receiver, but the present invention is not limited to such implementations.

[0275] According to the device of the embodiment of the present invention, as in the third embodiment, when control information relates to two TCI states, the TCI state of the signal or channel indicated by the control information can be clarified, and the TCI state of the signal or channel can be indicated more flexibly.

[0276] Example 7 An embodiment of the present invention provides a communication system. Fig. 18 is a schematic diagram illustrating a communication system according to an embodiment of the present invention. As shown in Fig. 18, a communication system 1800 includes a network device 1801 and a terminal device 1802. For convenience of explanation, Fig. 18 illustrates only one terminal device and one network device as an example, but the embodiment of the present invention is not limited thereto.

[0277] In an embodiment of the present invention, existing services or services that can be implemented in the future can be transmitted between the network device 1801 and the terminal device 1802. For example, these services include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), ultra reliable low latency communications (URLLC), vehicle-to-vehicle / vehicle-to-everything (V2X), etc.

[0278] In some embodiments, the network device 1801 generates and transmits control information to the terminal device 1802. The terminal device 1802 receives the control information that triggers a channel or a signal. Reception or monitoring of the control information is associated with two TCI states, and the DCI format corresponding to the control information does not include a TCI field. The terminal device 1802 transmits or receives the channel or signal based on the two TCI states or one of the two TCI states. The present invention is not limited to the details related to the network device 1801. The details related to the terminal device 1802 are the same as those in the first and fourth embodiments, and therefore will not be described here.

[0279] In some embodiments, the network device 1801 generates control information related to two TCI states and transmits the control information to the terminal device 1802. The DCI format corresponding to the control information includes a TCI field. The terminal device 1802 receives the control information. The network device 1801 is similar to the second and fifth embodiments, and therefore its description will be omitted here. The terminal device 1802 is similar to the third and sixth embodiments, and therefore its description will be omitted here.

[0280] In addition, the embodiment of the present invention further provides a terminal device, which may be, for example, a UE, but the present invention is not limited thereto and may be other devices.

[0281] 19 is a schematic diagram illustrating a terminal device according to an embodiment of the present invention. As shown in FIG. 19, the terminal device 1900 may include a processor 1901 and a memory 1902. The memory 1902 stores data and programs and is connected to the processor 1901. Note that this diagram is illustrative, and other types of structures may be used to supplement or replace this structure to realize communication functions or other functions.

[0282] For example, the processor 1901 may be configured to execute a program to implement the wireless communication method described in the first or third embodiment.

[0283] As shown in Fig. 19, the terminal device 1900 may further include a communication module 1903, an input unit 1904, a display 1905, and a power supply 1906. Note that the terminal device 1900 does not need to include all of the units shown in Fig. 19. Furthermore, the terminal device 1900 may further include units not shown in Fig. 19, and prior art may be referred to.

[0284] An embodiment of the present invention further provides a network device, which may be, for example, a base station (gNB), but the present invention is not limited thereto and may be other network devices.

[0285] Fig. 20 is a schematic diagram showing a network device according to an embodiment of the present invention. As shown in Fig. 20, the network device 2000 may include a processor (central processing unit: CPU) 2001 and a memory 2002, and the memory 2002 is connected to the processor 2001. The memory 2002 may store various types of data, and may further store a data processing program and execute the program under the control of the processor 2001.

[0286] For example, the processor 2001 may be configured to execute a program to implement the wireless communication method described in the second embodiment.

[0287] 20, the network device 2000 may further include a transceiver 2003 and an antenna 2004. The functions of the above components are similar to those of the prior art, and a description thereof will be omitted here. The network device 2000 does not need to include all the units shown in FIG. 20. The network device 2000 may further include units not shown in FIG. 20, and prior art may be referenced.

[0288] In an embodiment of the present invention, there is further provided a computer-readable program, which, when executed on a terminal device, causes a computer to execute the method described in the above embodiment 1 or embodiment 3 on the terminal device.

[0289] An embodiment of the present invention further provides a storage medium having a computer-readable program stored therein, the program, when executed, causing a computer to perform the method described in the above embodiment 1 or embodiment 3 on a terminal device.

[0290] An embodiment of the present invention further provides a computer-readable program, which, when executed in a network device, causes a computer to perform the method described in the above embodiment 2 in the network device.

[0291] An embodiment of the present invention further provides a storage medium having a computer-readable program stored thereon, the program, when executed, causing a computer to perform the method described in the above embodiment 2 in a network device.

[0292] The above-described apparatus and methods of the present invention may be realized by hardware or a combination of hardware and software. The present invention relates to a computer-readable program that, when executed by a logic unit, causes the logic unit to implement the above-described apparatus or components, or to implement the above-described various methods or steps. The logic unit may be, for example, a field programmable logic unit, a microprocessor, or a processor used in a computer. The present invention also relates to a storage medium for storing the above-described program, for example, a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0293] Each processing method in each device described with reference to the embodiments of the present invention may be implemented by hardware, a software module executed by a processor, or a combination of both. For example, one or more of the functional block diagrams shown in the drawings, or one or more combinations of the functional block diagrams, may correspond to each software module in a computer program flow or each hardware module. These software modules may correspond to each step shown in the drawings. These hardware modules may be implemented by implementing these software modules in hardware, for example, using a field programmable gate array (FPGA).

[0294] The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, mobile hard disk, CD-ROM, or any other form of storage medium known to those skilled in the art. The storage medium may be connected to the processor so that the processor reads information from or writes information to the storage medium, or the storage medium may be a component of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card inserted into the mobile terminal. For example, if a device (e.g., a mobile terminal) uses a relatively large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0295] One or more functional blocks and / or one or more combinations of functional blocks in the functional block diagrams set forth in the figures may be implemented with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any suitable combination thereof to perform the functions described herein. One or more functional blocks and / or one or more combinations of functional blocks in the functional block diagrams set forth in the figures may be implemented with, for example, a combination of computing devices, such as a combination of a DSP and a microprocessor, a combination of multiple microprocessors, one or more microprocessors in combination with a DSP communication, or any other configuration.

[0296] Although the present invention has been described above with reference to specific embodiments, the above description is merely illustrative and does not limit the scope of protection of the present invention. Various modifications and changes may be made to the present invention without departing from the spirit and principles of the present invention, and these modifications and changes are also within the scope of the present invention.

[0297] Furthermore, the following supplementary notes are disclosed regarding the embodiments including the above examples. (Appendix 1) 1. A wireless communication method, comprising: a step in which a terminal device receives control information that triggers a channel or a signal, the reception or monitoring of the control information being associated with two TCI states, and a DCI format corresponding to the control information not including a TCI field; transmitting or receiving the channel or signal based on the two TCI states or one of the two TCI states. (Appendix 2) One of the two TCI states is: a first TCI state indicated by a MAC-CE command among TCI states of a control resource set (CORESET) for receiving or monitoring the control information; The TCI state of the lowest ID among the TCI states of a control resource set (CORESET) for receiving or monitoring the control information; a TCI state applied by a first control resource set indicated by RRC signaling among two control resource sets for receiving or monitoring the control information; a TCI state applied by the control resource set with the lowest ID of the two control resource sets for receiving or monitoring the control information; a TCI state corresponding to a first search space set indicated by RRC signaling among two search space sets for receiving or monitoring the control information; A TCI state corresponding to the search space set with the lowest ID of the two search space sets for receiving or monitoring the control information; and The method described in Supplementary Note 1, wherein the control information is at least one of a TCI state applied by a time-frequency resource for receiving or monitoring the control information. (Appendix 3) The time-frequency resource for receiving or monitoring the control information is the earliest symbol for receiving or monitoring said control information; a PRB with the lowest index for receiving or monitoring the control information; and The method described in Appendix 2, wherein the control information is one of the PRBs with the lowest index in the earliest symbol for receiving or monitoring the control information. (Appendix 4) the channel or signal is a PDSCH, the PDSCH being associated with a first TCI state; The first TCI state is a first TCI state indicated by a MAC-CE command among TCI states of a control resource set (CORESET) for receiving or monitoring the control information; The TCI state of the lowest ID among the TCI states of a control resource set (CORESET) for receiving or monitoring the control information; a TCI state applied by a first control resource set indicated by RRC signaling among two control resource sets for receiving or monitoring the control information; a TCI state applied by the control resource set with the lowest ID of the two control resource sets for receiving or monitoring the control information; a TCI state corresponding to a first search space set indicated by RRC signaling among two search space sets for receiving or monitoring the control information; A TCI state corresponding to the search space set with the lowest ID of the two search space sets for receiving or monitoring the control information; and The method described in Supplementary Note 1, wherein the control information is at least one of a TCI state applied by a time-frequency resource for receiving or monitoring the control information. (Appendix 5) The time-frequency resource for receiving or monitoring the control information is the earliest symbol for receiving or monitoring said control information; a PRB with the lowest index for receiving or monitoring the control information; and The method described in Appendix 4, wherein the control information is one of the PRBs with the lowest index in the earliest symbol for receiving or monitoring the control information. (Appendix 6) the PDSCH is further associated with a second TCI state; 5. The method of claim 4, wherein the second TCI state is a TCI state other than the first TCI state of the two TCI states. (Appendix 7) The method described in Supplementary Note 1, wherein the terminal device determines to transmit or receive the channel or signal based on the two TCI states based on RRC signaling or a DCI field of the DCI format. (Appendix 8) The method of Supplementary Note 1, wherein the terminal device determines to transmit or receive the channel or signal based on one of the two TCI states based on RRC signaling or a DCI field of the DCI format. (Appendix 9) 9. The method according to claim 7, wherein the DCI field of the DCI format is a TDRA field of the DCI format. (Appendix 10) 9. The method of claim 7 or 8, wherein the RRC signaling is used to indicate whether the channel or signal is associated with one TCI state or two TCI states. (Appendix 11) 2. The method of claim 1, wherein a time offset between the control information and the channel or signal is equal to or greater than a pre-determined time period. (Appendix 12) the channel or signal is a downlink channel or signal or an uplink channel or signal; the downlink channel or signal is a PDSCH or a CSI-RS; 12. The method of any one of Supplementary Notes 1 to 3 and 7 to 11, wherein the uplink channel or signal is at least one of a PUSCH, a PUCCH, and an SRS. (Appendix 13) 1. A wireless communication method, comprising: A method comprising: a step of a network device transmitting control information relating to two TCI states, wherein a DCI format corresponding to the control information includes a TCI field. (Appendix 14) 14. The method according to claim 13, wherein, when the control information relates to two TCI states, the DCI format corresponding to the control information includes a TCI field. (Appendix 15) 15. The method of claim 13 or 14, wherein the control information triggers a channel or signal. (Appendix 16) The control information relates to two TCI states, 15. The method of claim 13 or 14, wherein the transmission of the control information is associated with two TCI states. (Appendix 17) The DCI format corresponding to the control information includes a TCI field, 15. The method according to claim 13 or 14, wherein the network device enables a parameter tci-PresentInDCI of a control resource set associated with the DCI format. (Appendix 18) The DCI format corresponding to the control information includes a TCI field, 15. The method according to claim 13 or 14, wherein the network device enables the parameter tci-PresentInDCI of all control resource sets associated with the DCI format. (Appendix 19) The DCI format corresponding to the control information includes a TCI field, 15. The method according to claim 13 or 14, wherein the network device configures a parameter tci-PresentInDCI-ForFormat1_2 of a control resource set associated with the DCI format. (Appendix 20) The DCI format corresponding to the control information includes a TCI field, 15. The method according to claim 13 or 14, wherein the network device configures a parameter tci-PresentInDCI-ForFormat1_2 of all control resource sets associated with the DCI format. (Appendix 21) the channel or signal is a downlink channel or signal or an uplink channel or signal; the downlink channel or signal is a PDSCH or a CSI-RS; 16. The method of claim 15, wherein the uplink channel or signal is at least one of a PUSCH, a PUCCH, and an SRS. (Appendix 22) 16. The method of claim 15, wherein the TCI status of the channel or signal is indicated by the TCI field. (Appendix 23) 23. The method of claim 22, wherein the channel or signal is associated with one TCI state or two TCI states. (Appendix 24) 1. A wireless communication method, comprising: A method comprising: a step in which a terminal device receives control information relating to two TCI states, wherein a DCI format corresponding to the control information includes a TCI field. (Appendix 25) 25. The method of claim 24, wherein if the control information relates to two TCI states, the DCI format corresponding to the control information includes a TCI field. (Appendix 26) 25. The method of claim 24, wherein the control information triggers a channel or signal. (Appendix 27) The control information relates to two TCI states, 25. The method of claim 24, wherein the reception or monitoring of the control information relates to two TCI states. (Appendix 28) The DCI format includes a TCI field, The method according to Supplementary Note 24, which means that the terminal device expects that the parameter tci-PresentInDCI of the control resource set associated with the DCI format is enabled. (Appendix 29) The DCI format includes a TCI field, The method according to Supplementary Note 24, which means that the terminal device expects the parameter tci-PresentInDCI of all control resource sets associated with the DCI format to be enabled. (Appendix 30) The DCI format includes a TCI field, The method described in Supplementary Note 24, which means that the terminal device expects that the parameter tci-PresentInDCI-ForFormat1_2 of the control resource set associated with the DCI format is configured. (Appendix 31) The DCI format includes a TCI field, The method described in Supplementary Note 24, which means that the terminal device expects that the parameter tci-PresentInDCI-ForFormat1_2 of all control resource sets associated with the DCI format is configured. (Appendix 32) 32. A terminal device comprising: a memory having a computer program stored therein; and a processor, the processor configured to execute the computer program to implement a method according to any one of claims 1 to 12 and 24 to 31. (Appendix 33) 24. A network device comprising: a memory having a computer program stored therein; and a processor, the processor configured to execute the computer program to implement a method according to any one of claims 13 to 23. (Appendix 34) A communication system including a terminal device and a network device, The terminal device is configured to perform the method according to any one of Supplementary Notes 24 to 31, and the network device is configured to perform the method according to any one of Supplementary Notes 13 to 23, or 13. A communication system, wherein the terminal device is configured to perform a method according to any one of claims 1 to 12.

Claims

1. A wireless communication device configured in a terminal device, A receiver for receiving control information that triggers a physical downlink shared channel, wherein reception or monitoring of the control information is associated with two transmission configuration indicator (TCI) states, and a DCI format corresponding to the control information does not include a TCI field; a processor for receiving the physical downlink shared channel based on the two TCI states or one of the two TCI states; One of the two TCI states is a first TCI state of the two TCI states indicated by a medium access control-control unit (MAC-CE) command for a control resource set (CORESET) for receiving or monitoring the control information; A time offset between the control information and the physical downlink shared channel is equal to or greater than a pre-determined time period.

2. The time-frequency resource for receiving or monitoring the control information is the earliest symbol for receiving or monitoring said control information; the PRB with the lowest index for receiving or monitoring the control information; and 2. The apparatus of claim 1, wherein the control information is one of the PRBs with the lowest index in the earliest symbol for receiving or monitoring the control information.

3. the physical downlink shared channel is associated with a first TCI state; The first TCI state is: a first TCI state indicated by a MAC-CE command among TCI states of a control resource set (CORESET) for receiving or monitoring the control information; The TCI state of the lowest ID among the TCI states of a control resource set (CORESET) for receiving or monitoring the control information; a TCI state applied by a first control resource set indicated by RRC signaling of two control resource sets for receiving or monitoring the control information; a TCI state applied by the control resource set with the lowest ID of the two control resource sets for receiving or monitoring the control information; a TCI state corresponding to a first search space set indicated by RRC signaling of two search space sets for receiving or monitoring the control information; a TCI state corresponding to the lowest ID search space set of two search space sets for receiving or monitoring the control information; and The apparatus of claim 1 , wherein the control information is at least one of a TCI state applied by a time-frequency resource for receiving or monitoring the control information.

4. The time-frequency resource for receiving or monitoring the control information is the earliest symbol for receiving or monitoring said control information; the PRB with the lowest index for receiving or monitoring the control information; and 4. The apparatus of claim 3, wherein the control information is one of the PRBs with the lowest index in the earliest symbol for receiving or monitoring the control information.

5. the physical downlink shared channel is further associated with a second TCI state; 4. The apparatus of claim 3, wherein the second TCI state is a TCI state other than the first TCI state of the two TCI states.

6. The apparatus of claim 1 , wherein the processor determines to receive the physical downlink shared channel based on the two TCI states based on RRC signaling or a DCI field of the DCI format.

7. The apparatus of claim 1 , wherein the processor determines to receive the physical downlink shared channel based on one of the two TCI states based on RRC signaling or a DCI field of the DCI format.

8. The apparatus of claim 6 , wherein the DCI field of the DCI format is a TDRA field of the DCI format.

9. The apparatus of claim 6 , wherein the RRC signaling is used to indicate whether the physical downlink shared channel is associated with one TCI state or two TCI states.

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