Information receiving method and device and information sending method and device

Abstract

The embodiment of the invention provides an information receiving method and device and an information sending method and device. The method comprises: a terminal device receiving first indication information, the first indication information indicating a first TCI state and cell switching, and sending feedback information (HARQ-ACK); and after the last symbol of the feedback information (HARQ-ACK) passes through at least a first time interval, the indicated first TCI state is applied to the switched cell. Therefore, the terminal equipment and the network equipment can be prevented from generating ambiguity from when to apply the TCIstate on the switched cell, so that rapid beam switching and cell switching are realized.

Description

Information receiving and sending method and device Technical Field

[0001] The embodiments of the present application relate to the field of communication technologies. Background Art

[0002] The 3GPP standardization organization has carried out standardization work on Inter-Cell Beam Management (ICBM) during the standardization process of Release 17 (Rel-17). In Rel-17, terminal devices can use the beams of non-serving cells but do not switch to non-serving cells.

[0003] During the standardization process for Release 17 (Rel-17), the 3GPP standardization organization conducted work related to the unified transmission configuration indication (TCI). The unified TCI in Rel-17 was designed primarily for single transmission and reception point (sTRP) scenarios. Inter-cell beam management in Rel-17 is based on the unified TCI framework.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of this application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are explained in the background technology part of this application.

[0005] Summary of the Invention

[0006] Rel-17 standardizes Inter-Cell Beam Management (ICBM). ICBM includes measurement, reporting and beam indication. For measurement, the terminal device is able to perform L1-RSRP measurement based on the SSB of a non-serving cell. For reporting, the terminal device reports the L1-RSRP measurement result to the network device. For beam indication, the network device can indicate the transmission configuration indication (TCI) state associated with the non-serving cell to the terminal device. In this way, the terminal device can use the beam of the non-serving cell, for example, use the beam to send information to the non-serving cell or receive information from the non-serving cell. Although the terminal device is able to use the beam of the non-serving cell, the serving cell of the terminal device does not change, that is, the terminal device will not switch to the non-serving cell through the switching process. Therefore, the terminal device is still within the bandwidth of the serving cell and applies the indicated TCI state associated with the non-serving cell on the serving cell based on the relevant configuration of the serving cell. Here, the non-serving cell refers to a cell whose physical cell ID (PCI) is different from that of the serving cell.

[0007] Rel-17 standardized a unified TCI (transmission configuration indication). Rel-17 ICBM is based on Rel-17 unified TCI. Rel-17 unified TCI targets the sTRP (single transmission and reception point) scenario. The transmission configuration indication (TCI) field of DCI format 1_1 or DCI format 1_2 indicates one or more TCI states. DCI format 1_1 or DCI format 1_2 can schedule downlink data, called DCI format 1_1 / 1_2 with DL assignment, or can not schedule downlink data, called DCI format 1_1 / 1_2 without DL assignment. The indication or update of the TCI state actually also includes the indication or update of the beam used by the terminal device. The TCI state includes the joint TCI state, the downlink TCI state, and the uplink TCI state. The joint TCI state acts on both the downlink beam (receive beam) and the uplink beam (transmit beam). In other words, the downlink beam and the uplink beam use the same beam, but the beam directions are opposite, that is, there is reciprocity between the uplink and downlink beams. The downlink TCI state only acts on the downlink beam. The uplink TCI state only acts on the uplink beam. The uplink beam is also called the uplink transmit spatial filter. For the unified TCI of Rel-17, a TCI field indicates a joint TCI state, or a downlink TCI state, or an uplink TCI state, or a downlink TCI state and an uplink TCI state. Assuming that the DCI indicates the TCI state, the TCI state begins to be applied after the beam application time. The channels or signals to which the TCI state is applied include dedicated channels or signals for the terminal device, and some common channels or signals. Rel-17 defines a simultaneous TCI update list. Among the N cells in carrier aggregation, N1 (N1≤M) cells belong to one simultaneous TCI update list, N2 (N2≤M) cells belong to another simultaneous TCI update list, and so on. If the TCI state of a cell is updated and it belongs to a simultaneous TCI update list, the TCI state of all other cells in the simultaneous TCI update list is also updated. In other words, the TCI states of cells in a simultaneous TCI update list are updated simultaneously.

[0008] Rel-18 will study Layer 1 / Layer 2 (L1 / L2)-based mobility. The goal of L1 / L2-based mobility is to reduce the time required for handover interruption, thereby accelerating handovers from a serving cell to a non-serving cell. Handover interruption refers to the time between a terminal device receiving a cell handover command and its first uplink or downlink communication with the switched cell. Compared to traditional cell handovers based on Layer 3 signaling, cell handovers based on Layer 1 / L2 signaling can further reduce handover latency. To implement L1 / L2-based cell handovers, the terminal device must perform measurements and report on the non-serving cell, and the network equipment must indicate the beam to be used after the handover. Unlike Rel-17's ICBM, the terminal device does not need to perform a cell handover. Rel-18's L1 / L2-based mobility requires a cell handover to a non-serving cell (also called a target cell). Due to this key difference, the measurement, reporting, and beam indication in Rel-18 may require different designs.

[0009] Currently, 3GPP has not started discussions on the physical layer (RAN1) of layer 1 / layer 2-based mobility.

[0010] The inventors found that for Layer 1 / Layer 2 (L1 / L2 based) mobility in Rel-18, the terminal device needs to switch to the target cell and use the beam of the target cell (TCI state). Currently, how to implement cell switching and beam switching remains an open problem.

[0011] To address at least one of the above-mentioned issues, embodiments of the present application provide a method and apparatus for receiving and sending information. A terminal device is configured with one or more candidate target cells, each of which is associated with a time interval. The terminal device is instructed to switch to a candidate target cell, and after the time interval associated with the candidate target cell, the TCI state associated with the candidate target cell is applied to the target cell. This avoids ambiguity between the terminal device and the network device regarding when the TCI state can be applied to the cell after switching, thereby enabling rapid beam switching and cell switching.

[0012] According to one aspect of an embodiment of the present application, a method for receiving information is provided, which is applied to a terminal device, wherein the method includes:

[0013] receiving first indication information, wherein the first indication information indicates a first TCI state and a cell handover,

[0014] Send feedback information (HARQ-ACK);

[0015] After at least a first time interval has passed after the last symbol of the feedback information (HARQ-ACK), the indicated first TCI state is applied in the cell after the handover.

[0016] According to another aspect of an embodiment of the present application, a method for receiving information is provided, which is applied to a terminal device, wherein the method includes:

[0017] receiving third indication information, wherein the third indication information indicates a fourth TCI state;

[0018] Applying the indicated fourth TCI state in the serving cell after at least a fourth time interval has passed after the last symbol of feedback information (HARQ-ACK) sent for the third indication information;

[0019] receiving fourth indication information, wherein the fourth indication information indicates cell switching;

[0020] After at least a fifth time interval after the reference symbol, the fourth TCI state indicated is applied in the switched cell, wherein the reference symbol is the last symbol of the fourth indication information, or the last symbol of the feedback information (HARQ-ACK) sent for the fourth indication information.

[0021] According to another aspect of an embodiment of the present application, there is provided an information sending method, applied to a network device, wherein the method includes:

[0022] Sending first indication information, wherein the first indication information indicates a first TCI state and cell switching,

[0023] Receive feedback information (HARQ-ACK);

[0024] The first TCI state is used to apply the indicated first TCI state in the cell after switching after at least a first time interval has passed after the last symbol of the feedback information (HARQ-ACK).

[0025] According to another aspect of an embodiment of the present application, there is provided an information sending method, applied to a network device, wherein the method includes:

[0026] Sending third indication information, wherein the third indication information indicates a fourth TCI state;

[0027] receiving feedback information (HARQ-ACK) for the third indication information, wherein, after at least a fourth time interval has passed after the last symbol of the feedback information (HARQ-ACK) for the third indication information, the terminal device applies the indicated fourth TCI state in the serving cell;

[0028] Sending fourth indication information, wherein the fourth indication information indicates cell switching;

[0029] In which, after at least the fifth time interval after the reference symbol, the terminal device applies the indicated fourth TCI state in the switched cell, wherein the reference symbol is the last symbol of the fourth indication information, or the last symbol of the feedback information (HARQ-ACK) for the fourth indication information.

[0030] According to another aspect of an embodiment of the present application, there is provided an information receiving apparatus configured in a terminal device, the information receiving apparatus comprising:

[0031] a receiving unit configured to receive first indication information, wherein the first indication information indicates a first TCI state and a cell handover,

[0032] a sending unit, which sends feedback information (HARQ-ACK);

[0033] The first TCI state indicated is applied in the switched cell after at least a first time interval has passed after the last symbol of the feedback information (HARQ-ACK).

[0034] According to another aspect of an embodiment of the present application, an information receiving apparatus is configured in a terminal device, and the information receiving apparatus includes:

[0035] a second receiving unit configured to receive third indication information, wherein the third indication information indicates a fourth TCI state;

[0036] a second sending unit, configured to send feedback information (HARQ-ACK) in response to the third indication information, wherein the indicated fourth TCI state is applied in the serving cell after at least a fourth time interval has passed after a last symbol of the feedback information (HARQ-ACK) sent in response to the third indication information;

[0037] The second receiving unit further receives fourth indication information, wherein the fourth indication information indicates cell switching;

[0038] After at least a fifth time interval after the reference symbol, the fourth TCI state indicated is applied in the switched cell, wherein the reference symbol is the last symbol of the fourth indication information, or the last symbol of the feedback information (HARQ-ACK) sent by the second sending unit for the fourth indication information.

[0039] According to another aspect of an embodiment of the present application, there is provided an information sending device, configured in a network device, wherein the device includes:

[0040] A third sending unit is configured to send first indication information, wherein the first indication information indicates a first TCI state and a cell handover.

[0041] A third receiving unit receives feedback information (HARQ-ACK); wherein the first TCI state is used to apply the indicated first TCI state in the switched cell after at least a first time interval has passed after the last symbol of the feedback information (HARQ-ACK).

[0042] According to another aspect of an embodiment of the present application, there is provided an information sending apparatus, applied to a network device, wherein the apparatus includes:

[0043] a fourth sending unit, configured to send third indication information, wherein the third indication information indicates a fourth TCI state;

[0044] a fourth receiving unit, which receives feedback information (HARQ-ACK) for the third indication information, wherein, after at least a fourth time interval has passed after the last symbol of the feedback information (HARQ-ACK) for the third indication information, the terminal device applies the indicated fourth TCI state in the serving cell;

[0045] The fourth sending unit further sends fourth indication information, wherein the fourth indication information indicates cell switching;

[0046] In which, after at least the fifth time interval after the reference symbol, the terminal device applies the indicated fourth TCI state in the switched cell, wherein the reference symbol is the last symbol of the fourth indication information, or the last symbol of the feedback information (HARQ-ACK) for the fourth indication information.

[0047] One of the beneficial effects of the embodiments of the present application is that it can avoid ambiguity between terminal devices and network devices about when the TCI state can be applied to the switched cell, thereby achieving fast beam switching and cell switching.

[0048] With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many variations, modifications and equivalents.

[0049] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0050] It should be emphasized that the term "include / comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The elements and features described in one figure or one embodiment of the present application can be combined with the elements and features shown in one or more other figures or embodiments. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one embodiment.

[0052] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application;

[0053] FIG2 is a schematic diagram of a signaling sending and receiving process according to an embodiment of the present application;

[0054] FIG3 is a schematic diagram of an information receiving method according to an embodiment of the present application;

[0055] FIG4 is another schematic diagram of the signaling sending and receiving process according to an embodiment of the present application;

[0056] FIG5 is a schematic diagram of the association between TCI states and cells according to an embodiment of the present application;

[0057] FIG6 is a schematic diagram of determining a first time interval according to an embodiment of the present application;

[0058] FIG7 is another schematic diagram of determining a first time interval according to an embodiment of the present application;

[0059] FIG8 is an example diagram of configuring a third time interval according to an embodiment of the present application;

[0060] FIG9 is another example diagram of configuring a third time interval according to an embodiment of the present application;

[0061] FIG10 is another schematic diagram of the information receiving method according to an embodiment of the present application;

[0062] FIG11 is another schematic diagram of the signaling sending and receiving process according to an embodiment of the present application;

[0063] FIG12 is another schematic diagram of the information receiving method according to an embodiment of the present application;

[0064] FIG13 is another schematic diagram of the signaling sending and receiving process according to an embodiment of the present application;

[0065] FIG14 is a schematic diagram of a method for sending information according to an embodiment of the present application;

[0066] FIG15 is another schematic diagram of the information sending method according to an embodiment of the present application;

[0067] FIG16 is another schematic diagram of the information sending method according to an embodiment of the present application;

[0068] FIG17 is a schematic diagram of an information receiving device according to an embodiment of the present application;

[0069] FIG18 is another schematic diagram of an information receiving device according to an embodiment of the present application;

[0070] FIG19 is a schematic diagram of an information sending device according to an embodiment of the present application;

[0071] Figure 20 is another schematic diagram of the information sending device according to an embodiment of the present application.

[0072] FIG21 is a schematic diagram of the structure of a network device according to an embodiment of the present application;

[0073] Figure 22 is a schematic diagram of a terminal device according to an embodiment of the present application. DETAILED DESCRIPTION

[0074] The above and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, which illustrate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the appended claims.

[0075] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements from the name, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0076] In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

[0077] In the embodiments of the present application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0078] Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), etc., and / or other communication protocols currently known or to be developed in the future.

[0079] In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to the communication network and provides services to the terminal device. Network devices may include, but are not limited to, the following devices: base station (BS), access point (AP), transmission reception point (TRP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), etc.

[0080] Base stations may include, but are not limited to, NodeB (NB), evolved NodeB (eNodeB or eNB), and 5G base stations (gNB), among others. They may also include remote radio heads (RRHs), remote radio units (RRUs), relays, or low-power nodes (e.g., femeto, pico, etc.). The term "base station" may include some or all of their functions, and each base station may provide communication coverage for a specific 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.

[0081] In the embodiments of the present application, the term "user equipment" (UE) or "terminal equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives network services. A terminal device can 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, and so on.

[0082] Among them, terminal devices may include but are not limited to the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smart phones, smart watches, digital cameras, etc.

[0083] For another example, in scenarios such as the Internet of Things (IoT), the terminal device can also be a machine or device for monitoring or measurement, including but not limited to: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device-to-device (D2D) terminal, machine-to-machine (M2M) terminal, and so on.

[0084] In addition, the term "network side" or "network device side" refers to one side of the network, which can be a base station or one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the user or terminal side, which can be a UE or one or more terminal devices as described above. Unless otherwise specified herein, "device" can refer to either network equipment or terminal equipment.

[0085] The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

[0086] Figure 1 is a schematic diagram of a communication system according to an embodiment of the present application, which schematically illustrates a situation taking a terminal device and a network device as an example. As shown in Figure 1 , a communication system 100 may include a first network device 101, a second network device 102, and a terminal device 103. For simplicity, Figure 1 only illustrates two network devices and one terminal device as an example, but the embodiment of the present application is not limited to this.

[0087] For example, the first network device 101 is a serving cell of the terminal device 103, and the second network device 102 is a non-serving cell of the terminal device 103.

[0088] FIG2 is a schematic diagram of a signaling transmission process according to an embodiment of the present application. FIG2 is used as an example to schematically illustrate Inter-Cell Beam Management (ICBM).

[0089] The terminal device receives a DCI indicating a TCI state, where the TCI state is associated with a non-serving cell (e.g., the second network device 102 in FIG1 ). The terminal device feeds back an ACK, and applies the indicated TCI state at least one time interval Y (Y symbols of the serving cell, also referred to as the beam application time (BAT, Beam Application Time)) after the last symbol of the ACK. For inter-cell beam management, the terminal device may be instructed to use the beam of a non-serving cell, but the terminal device does not perform cell switching, but only uses the beam of a non-serving cell on a serving cell (e.g., the first network device 101 in FIG1 ). The specific value of Y is configured by the network device so that the terminal device has sufficient time to apply the newly indicated TCI state, i.e., to leave time for beam switching.

[0090] Unlike inter-cell beam management, for Layer 1 / Layer 2 (L1 / L2)-based cell handover in Rel-18, the terminal device not only needs to use the beam of the non-serving cell but also needs to handover to the non-serving cell. Considering that the non-serving cell may have a different center frequency and / or subcarrier spacing from the serving cell, in addition to the beam switching time, the terminal device needs additional time for cell handover.

[0091] How to ensure that network equipment and terminal equipment do not have ambiguity in the beam application time of the cell after switching, that is, both parties have the same understanding of when the TCI state can be applied to the cell after switching, is a problem that needs to be solved.

[0092] To address at least one of the above problems, embodiments of the present application provide a method and apparatus for receiving and sending information.

[0093] Embodiments of the first aspect

[0094] An embodiment of the present application provides an information receiving method, which is applied on a terminal device side.

[0095] FIG3 is a schematic diagram of an information receiving method according to an embodiment of the present application. As shown in FIG3 , the method includes:

[0096] 301, receiving first indication information, where the first indication information indicates a first TCI state and a cell handover;

[0097] 302. Send feedback information (HARQ-ACK), and apply the indicated first TCI state in the switched cell after at least a first time interval has passed after the last symbol of the feedback information (HARQ-ACK).

[0098] The first indication information indicates to the terminal device a first TCI state and a cell switch. Furthermore, the terminal device applies the indicated first TCI state in the switched cell after at least a first time interval has passed after the last symbol of the feedback information (HARQ-ACK). This avoids ambiguity between the terminal device and the network device regarding when the TCI state can be applied in the switched cell, thereby enabling rapid beam switching and cell switching.

[0099] It is worth noting that FIG3 above is merely a schematic illustration of an embodiment of the present application, using a terminal device as an example, but the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, other operations may be added or some operations may be reduced, and the objects of the aforementioned operations may be adjusted. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG4 above.

[0100] In some embodiments, terms such as "TCI state" and "beam" may be used interchangeably. "Cell" may be equivalently replaced with "Carrier." The method applicable to the "simultaneous TCI update list" described later also applies to the "primary cell group" or "secondary cell group," i.e., "simultaneous TCI update list" is replaced with "primary cell group" or "secondary cell group." The above description is merely illustrative and the present invention is not limited thereto.

[0101] Figure 4 is another schematic diagram of the signaling sending and receiving process of an embodiment of the present application. As shown in Figure 4, the first indication information of the signaling indicating the TCI state and cell switching (also referred to as switching signaling) may be DCI and / or MAC CE. The terminal device receives the switching signaling sent by the serving cell and sends an ACK for the DCI and / or PDSCH. The serving cell may also be referred to as a source cell, and the number thereof may be one or more; the ACK may also be equivalently replaced by a HARQ-ACK. The terminal device requires time to switch cells and apply the indicated TCI state, so the indicated TCI state can only be applied to the cell after switching after at least the first time interval (Z) after the last symbol of the ACK. The unit of the first time interval (Z) may be a symbol, or a millisecond, or a time slot.

[0102] In some implementations, first configuration information is received, where the first configuration information configures one or more candidate target cells.

[0103] For example, before receiving the first indication information (handover signaling), the terminal device is configured with one or more candidate target cells and is provided with configuration information related to the candidate target cells. The handover signaling instructs the terminal device to switch to one or more of the candidate target cells; the configuration information indicates the necessary information required for the terminal device to use the candidate target cell after the handover, such as the relevant information in the cell handover process of the prior art, which is not limited in this application.

[0104] In some implementations, the first indication information indicates a candidate target cell as a primary target cell among the configured one or more candidate target cells.

[0105] For example, the first indication information indicates at least the following:

[0106] Indicates the TCI state applied to the cell after handover;

[0107] Instructing the terminal device to perform cell switching;

[0108] Indicates a primary target cell (target cell). Optionally, the first indication information may additionally indicate one or more candidate target cells.

[0109] For example, the first indication information instructs the terminal device to switch to one or more candidate target cells, wherein the primary target cell is one of the one or more candidate target cells. For example, the first indication information may instruct the terminal device to switch to one candidate target cell, and the one candidate target cell is the primary target cell (target cell). For example, the first indication information may instruct the terminal device to switch to multiple candidate target cells, such as multiple carrier-aggregated cells, which belong to the same master cell group (MCG) or the same secondary cell group (SCG). If the first indication information indicates multiple candidate target cells, it indicates one candidate target cell as the primary candidate target cell. For example, one candidate target cell is indicated as the primary cell (Pcell, Primary cell), and the other candidate target cells are indicated as secondary cells (Scell, Secondary cell), or one candidate target cell is indicated as the primary secondary cell (PScell, Primary Secondary cell), and the other candidate target cells are indicated as secondary cells, and the indicated Pcell or PScell ​​is the primary target cell.

[0110] In some implementations, the indicated first TCI state is associated with a cell, which is the primary target cell, or a cell other than the primary target cell.

[0111] For example, the indicated first TCI state is associated with a cell, which is the primary target cell.

[0112] FIG5 is a schematic diagram showing the association between TCI states and cells according to an embodiment of the present application.

[0113] As shown in Figure 5, for example, the first indication information (handover signaling) indicates a TCI state, and the TCI state is associated with a cell ID (cell ID), which is the primary target cell. The terminal device is configured with N candidate target cells and is provided with the cell ID of each candidate target cell. Therefore, based on the cell ID, it can be determined which candidate target cell is the primary target cell indicated by the handover signaling. There is no restriction on the specific form of the cell ID, for example, it can be a physical cell ID (PCI); the cell associated with the TCI state can be a non-service cell, and this application does not limit this.

[0114] For example, the indicated first TCI state is associated with a cell that is a cell other than the primary target cell.

[0115] For example, the first indication information (handover signaling) (DCI or MAC CE) indicates a first cell as the primary target cell and indicates a TCI state, where the TCI state is associated with a second cell, and the second cell may be different from the first cell. The terminal device can use the beam of the second cell on the first cell, thereby making beam selection more flexible and enabling the terminal device to always use the best beam; the cell associated with the TCI state may be a non-serving cell, and the present application does not limit this.

[0116] In some embodiments, the cell after handover includes: the primary target cell; or, the primary target cell and one or more candidate target cells other than the primary target cell, where the primary target cell and one or more candidate target cells other than the primary target cell belong to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belong to the same master cell group (MCG), and / or, belong to the same secondary cell group (SCG).

[0117] For example, the "cell after handover" and the "cell indicated by the handover signaling" are not necessarily the same; the "cell after handover" specifically refers to the cell after handover that applies the indicated TCI state, that is, the cell after handover that applies the indicated beam. The "cell indicated by the handover signaling" generally refers to the cell after handover, but not all of these cells necessarily apply the indicated TCI state. For example, the handover signaling indicates a primary target cell and N1 candidate target cells belonging to the same master cell group, but the cells that apply the indicated TCI state only include the primary target cell and N2 candidate target cells belonging to the same simultaneous TCI update list, where N2 < N1. In this case, the "cell after handover" is a subset of the "cell indicated by the handover signaling". Another example is that the handover signaling only indicates a primary target cell, but the cells that apply the indicated TCI state include the primary target cell and N2 candidate target cells belonging to the same simultaneous TCI update list. In this case, the "cell indicated by the handover signaling" is a subset of the "cell after handover".

[0118] For example, the handover signaling indicates one or more candidate target cells, one of which is the primary target cell. After receiving the handover signaling, the terminal device will handover to one or more candidate target cells and apply the relevant configuration information.

[0119] In some implementations, the indicated TCI state applies only to the primary target cell.

[0120] For example, the primary target cell is a non-carrier aggregation (CA) cell.

[0121] For example, the primary target cell does not belong to any simultaneous TCI update list.

[0122] For example, even though the primary target cell and M1 other candidate target cells belong to the same simultaneous TCI update list, the indicated TCI state is still applied only to the primary target cell. This is because, in order to apply beams simultaneously to multiple cells, the first time interval (Z) needs to be determined based on the largest time interval among the multiple cells. To more quickly apply beams during cell handover, beams can be applied only to the primary target cell, eliminating the impact of other cells requiring a larger time interval and enabling faster handover completion through the primary target cell.

[0123] For example, if the terminal device applies an indicated TCI state within the handover interruption time, the terminal device applies the indicated TCI state only on the primary target cell, i.e., does not use the simultaneous TCI update list. The TCI state here is not limited to the TCI state indicated by the handover signaling, but can also be the TCI state indicated by other signaling that only indicates the beam. Conversely, if the terminal device applies an indicated TCI state outside the handover interruption time, the terminal device uses the simultaneous TCI update list, i.e., reuses the Rel-17 ICBM.

[0124] In some implementations, the indicated TCI state applies to the primary target cell and one or more candidate target cells.

[0125] For example, in the case of carrier aggregation, the main target cell may aggregate other candidate target cells. The terminal device switches to the main target cell and also switches to the other candidate target cells aggregated by it. The configuration information may indicate which candidate target cells belong to the same main cell group or secondary cell group. For example, the indicated TCI state applies to all cells belonging to the same main cell group or secondary cell group. Therefore, the cell after switching may include an indicated main target cell and include one or more other candidate target cells belonging to the same main cell group or secondary cell group as the main target cell. The configuration information may indicate which candidate target cells in a main cell group or secondary cell group belong to the same simultaneous TCI update list. For example, the indicated TCI state applies to all cells belonging to the same simultaneous TCI update list. Therefore, the cell after switching may include an indicated main target cell and include one or more other candidate target cells belonging to the same simultaneous TCI update list as the main target cell.

[0126] In some embodiments, the indicated first TCI state is different from a third TCI state indicated to the terminal device before the terminal device is indicated with the first TCI state.

[0127] For example, under the condition that the indicated first TCI state is different from the third TCI state previously indicated to the terminal device, the terminal device applies the indicated first TCI state in the cell after switching based on the above method; the previously indicated third TCI state is indicated by signaling that only indicates the TCI state, or by signaling that simultaneously indicates the TCI state and cell switching.

[0128] In some embodiments, second indication information is received after receiving the first indication information, wherein the second indication information indicates a second TCI state; when a first cell set to which the indicated first TCI state is applied is a subset of a second cell set to which the indicated second TCI state is applied, the indicated second TCI state is applied on the second cell set; wherein the second TCI state is the same as the first TCI state.

[0129] For example, a terminal device receives handover signaling. Although the indicated primary target cell belongs to a simultaneous TCI update list, since the first TCI state is indicated by the handover signaling, the terminal device applies the indicated first TCI state only on the primary target cell, rather than on all cells included in the simultaneous TCI update list. Therefore, the first set of cells to which the first TCI state is applied only includes the primary target cell in the simultaneous TCI update list. Afterwards, the terminal device receives another signaling indicating a TCI state, which indicates a second TCI state for the simultaneous TCI update list; since the second TCI state is not indicated by the handover signaling, the terminal device applies the second TCI state on all cells included in the simultaneous TCI update list. Therefore, the second set of cells to which the second TCI state is applied includes all cells in the simultaneous TCI update list, and the first set of cells to which the first TCI state is applied is a subset of the second set of cells to which the second TCI state is applied. Although the second TCI state is the same as the first TCI state, the terminal device also needs to perform the above-mentioned operation of applying the TCI state, that is, applying the TCI state on a second set of cells that is different from the first set of cells.

[0130] In some embodiments, the first TCI state is applied to at least one of the following channels or signals of the primary target cell: SSB; PRACH; Type 1 physical downlink control channel common search space set Type1-PDCCH CSS set; CORESET associated with Type1-PDCCH CSS set; Type 2 physical downlink control channel common search space set Type2-PDCCH CSS set; CORESET associated with Type2-PDCCH CSS set; or, PUSCH scheduled by a random access response uplink grant RAR (Random Access Response) UL grant.

[0131] For example, the indicated TCI state is applied to the primary target cell, that is, the terminal device uses the indicated beam in the primary target cell. More specifically, the indicated TCI state is applied to at least one of the following channels or signals of the primary target cell, including:

[0132] SSB; for example, the terminal device can receive SSB using the indicated beam to obtain downlink synchronization with the primary target cell;

[0133] PRACH; for example, the terminal device can use the indicated beam to send a PRACH preamble (Msg1), thereby obtaining uplink synchronization with the primary target cell through a random access procedure;

[0134] Type1-PDCCH CSS set; for example, the terminal device uses the indicated beam in the Type1-PDCCH CSS set to receive the PDCCH whose CRC is scrambled by the RA-RNTI or TC-RNTI, that is, the PDCCH scheduling Msg2 or Msg4;

[0135] CORESET associated with the Type1-PDCCH CSS set; for example, the terminal device receives the PDCCH whose CRC is scrambled by the RA-RNTI or TC-RNTI using the indicated beam within the CORESET associated with the Type1-PDCCH CSS set.

[0136] Type2-PDCCH CSS set; for example, the terminal device uses the indicated beam in the Type2-PDCCH CSS set to receive the PDCCH whose CRC is scrambled by the P-RNTI, that is, the PDCCH that schedules the paging message.

[0137] CORESET associated with the Type2-PDCCH CSS set; for example, the terminal device receives the PDCCH whose CRC is scrambled by the P-RNTI using the indicated beam within the CORESET associated with the Type2-PDCCH CSS set.

[0138] PUSCH scheduled by the RAR UL grant; for example, the terminal device uses the indicated beam to send the PUSCH scheduled by the RAR UL grant, that is, Msg3.

[0139] In some embodiments, each of the configured one or more candidate target cells is associated with a first time interval, and at least the first time interval includes the first time interval associated with the primary target cell.

[0140] For example, after the primary target cell is determined according to the first indication information, the first time interval (Z) corresponding to the primary target cell can be obtained, and after at least the first time interval (Z) corresponding to the primary target cell has passed after the last symbol of the feedback information (HARQ-ACK), the first TCI state indicated is applied in the switched cell.

[0141] FIG6 is a schematic diagram of determining a first time interval according to an embodiment of the present application.

[0142] For example, as shown in FIG6 , the terminal device is configured with N candidate target cells, and the candidate target cell n is associated with or corresponds to a first time interval Zn, where n=1, 2, …, N. Assuming that the handover signaling indicates a candidate target cell as the primary target cell, the time interval (Zn) associated with the primary target cell is N ) is considered to be the first time interval Z.

[0143] FIG7 is another schematic diagram of determining the first time interval according to an embodiment of the present application.

[0144] For example, as shown in FIG7 , the N candidate target cells include candidate target cells that belong to a simultaneous TCI update list and / or candidate target cells that do not belong to any simultaneous TCI update list. The candidate target cells in [3] in FIG7 belong to the same simultaneous TCI update list, and each candidate target cell is associated with a time interval. Similarly, each candidate target cell in [4] in FIG7 is associated with a time interval. The candidate target cells in [1], [2] and [5] in FIG7 do not belong to any simultaneous TCI update list, and as mentioned above, they are respectively associated with a time interval. Without loss of generality, the "simultaneous TCI update list" mentioned above can also be equivalently replaced by a "primary cell group" or a "secondary cell group". Assuming that the switching signaling indicates a candidate target cell as the primary target cell, the time interval associated with the primary target cell (Z QN ) is considered to be the first time interval Z.

[0145] In some embodiments, the first time interval associated with the candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG, Master Cell Group), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group) is the same.

[0146] As shown in FIG7 , the N candidate target cells include candidate target cells that belong to a simultaneous TCI update list and / or candidate target cells that do not belong to any simultaneous TCI update list. The candidate target cells in [3] in FIG7 belong to the same simultaneous TCI update list. Although each candidate target cell is associated with a time interval, these time intervals are the same, i.e., Z P1 =Z P2 =…=Z PN Similarly, the time interval associated with the candidate target cell in [4] in Figure 7 satisfies Z Q1 =Z Q2 =…=Z QNThe same time interval enables multiple cells in carrier aggregation to apply a certain TCI state at the same time, for example, to use a certain simulated receive or transmit beam at the same time, which helps to simplify the terminal device implementation. On the contrary, if the terminal device needs to form different simulated beams at the same time, the terminal device may not be able to implement it, or it requires a high implementation complexity. The candidate target cells in [1], [2] and [5] in Figure 7 do not belong to any simultaneous TCI update list. As mentioned above, they are each associated with a time interval.

[0147] In some embodiments, each of the one or more candidate target cells configured is associated with a first time interval, and the at least first time interval includes the maximum time interval among the first time intervals associated with the master target cell and the candidate target cell belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG, Master Cell Group), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group).

[0148] For example, the terminal device applies the indicated TCI state in the cell after switching. The cell after switching includes a main target cell and one or more candidate target cells, wherein the main target cell and the candidate target cell belong to the same simultaneous TCI update list, and / or the same main cell group, and / or the same secondary cell group. The terminal device uses a first time interval Z, wherein the first time interval Z is the largest time interval among the time intervals associated with the main target cell and the candidate target cell belonging to the same simultaneous TCI update list, and / or the same main cell group, and / or the same secondary cell group. In this way, regardless of whether the time intervals associated with each candidate target cell are the same, the terminal device can start using the indicated TCI state at the same time on the above-mentioned set of main target cells and candidate target cells.

[0149] In some embodiments, the first time interval associated with the candidate target cell is one or more symbols, wherein the one or more symbols are determined based on a first reference cell, and the first reference cell includes one of the following: the candidate target cell associated with the first time interval; the candidate target cell associated with the first time interval belongs to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belongs to the same master cell group (MCG, Master Cell Group), and / or, belongs to the same secondary cell group (SCG, Secondary Cell Group) with the smallest subcarrier spacing among the candidate target cells; the candidate target cell with the smallest subcarrier spacing among the configured one or more candidate target cells; or, the serving cell with the smallest subcarrier spacing among the serving cells.

[0150] For example, the terminal device is configured with N candidate target cells, and candidate target cell n is associated with Z n symbols, n=1,2,…,N. If the candidate target cell n does not belong to any simultaneous TCI update list, then Z n symbols are determined based on the candidate target cell n, in other words, Z n The symbol refers to the Z of the candidate target cell n. n Symbol, or Z n The symbols are determined based on the subcarrier spacing of the candidate target cell n. The candidate target cell with the smallest subcarrier spacing among the candidate target cells in a simultaneous TCI update list is recorded as candidate target cell m. If the candidate target cell n also belongs to the simultaneous TCI update list, then Z n symbols are determined based on the candidate target cell m, in other words, Z n The symbol refers to the Z of the candidate target cell m. n Symbol, or Z n symbols are determined based on the subcarrier spacing of the candidate target cell m.

[0151] For another example, regardless of whether the candidate target cell n belongs to a simultaneous TCI update list, Z n Each symbol is determined based on the candidate target cell n. In other words, if the candidate target cell n belongs to a simultaneous TCI update list, Z nThe number of symbols is determined based on candidate target cell n, rather than on the candidate target cell with the smallest subcarrier spacing among candidate target cells in a simultaneous TCI update list. This allows for faster application of the indicated TCI state to a primary target cell, enabling faster handover to a primary target cell. Handovers to other candidate target cells in the same simultaneous TCI update list as the primary target cell can then be completed.

[0152] For another example, the terminal device is configured with N candidate target cells, and candidate target cell n is associated with Z n symbols, n=1,2,…,N. Z n The symbols are determined based on the candidate target cell with the smallest subcarrier spacing among the N candidate target cells, or based on the serving cell with the smallest subcarrier spacing among the serving cells.

[0153] In some embodiments, the first time interval Z is one or more symbols, where the symbols are determined based on a reference cell, and the reference cell is one of the following: a primary target cell; a cell with the smallest subcarrier spacing among the switched cells; a candidate target cell with the smallest subcarrier spacing among all candidate target cells; or a serving cell with the smallest subcarrier spacing among all serving cells.

[0154] For example, the first time interval Z is the time interval associated with the main target cell indicated by the switching signaling. Since the cell after switching may include only one main target cell, and the symbol of the time interval associated with a candidate target cell can be determined based on the candidate target cell, the following conclusion is satisfied: the symbol of the first time interval Z is determined based on the main target cell. Since the cell after switching may include the main target cell and other candidate target cells belonging to the same simultaneous TCI update list, and the symbol of the time interval associated with a candidate target cell can be determined based on the candidate target cell with the smallest subcarrier interval among multiple candidate target cells belonging to the same simultaneous TCI update list, the following conclusion is also satisfied: the symbol of the first time interval Z is determined based on the cell with the smallest subcarrier interval among the cells after switching. The cell after switching can be equivalently replaced by a cell to which the indicated TCI state is applied. Other ways of determining the reference cell are similar to the aforementioned method of determining the reference cell for the time interval associated with the candidate target cell, and will not be repeated here.

[0155] In some embodiments, starting from the first time slot after at least the first time interval (Z) after the last symbol of the feedback information (HARQ-ACK), the first TCI state indicated is applied in the switched cell, wherein the first time slot is determined based on a second reference cell, and the second reference cell includes one of the following: the primary target cell; the cell with the smallest subcarrier spacing in the switched cell.

[0156] For example, as shown in Figure 4, the terminal device applies the indicated TCI state in the switched cell at least after the first time interval Z after the last symbol of the ACK. Furthermore, the terminal device applies the indicated TCI state starting from the first time slot after Z; the first time slot is determined based on the second reference cell.

[0157] For example, as shown in Figure 2, the terminal device applies the indicated TCI state in the cell after the handover, at least a time interval Y after the last symbol of the ACK. This reuses time interval Y in the Rel-17 ICBM. Furthermore, the terminal device applies the indicated TCI state starting from the first time slot after Y. This first time slot is determined based on the second reference cell.

[0158] For example, the terminal device applies the indicated TCI state on multiple carrier-aggregated cells, and the first time slot is determined based on the cell with the smallest subcarrier spacing. In other words, the time slot refers to the time slot of the cell with the smallest subcarrier spacing, or the time slot is determined based on the subcarrier spacing of the cell with the smallest subcarrier spacing. This enables multiple cells of the carrier aggregation to apply a certain TCI state at the same time, for example, to use a certain analog receive or transmit beam at the same time, which is conducive to simplifying the implementation of the terminal device. On the contrary, if the terminal device needs to form different analog beams at the same time, the terminal device may not be able to implement it, or it may require a high implementation complexity.

[0159] For example, the terminal device applies the indicated TCI state only on the primary target cell, and the first time slot is determined based on the primary target cell, that is, the first time slot is the first time slot of the primary target cell.

[0160] For example, the terminal device applies the indicated TCI state on a cell with multiple carrier aggregations, and the first time slot is determined based on the primary target cell.

[0161] In some embodiments, second configuration information is received, wherein the second configuration information configures a third time interval for each of the one or more configured candidate target cells; or the second configuration information configures the same third time interval for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG, Master Cell Group), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group); or the second configuration information configures a third time interval for the configured one or more candidate target cells.

[0162] In some implementations, the first time interval associated with a candidate target cell is equal to a third time interval configured for the candidate target cell.

[0163] In some embodiments, when the second configuration information configures a third time interval for each of the one or more candidate target cells configured: the third time interval configured for the candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG), and / or, belonging to the same secondary cell group (SCG), is the same.

[0164] The following are examples:

[0165] For example, the time interval associated with the candidate target cell is configured by the network device through RRC signaling, and the network device configures a third time interval (also referred to as the configured "first time interval Z") for the candidate target cell. The word "configure" in the present invention can also be equivalently replaced by "indicate" or "activate". The embodiments of the present invention do not limit how to configure, indicate, or activate, for example, through RRC signaling configuration, through DCI signaling indication, or through MAC CE indication or activation.

[0166] For example, the network device configures a third time interval for each of the one or more configured candidate target cells. For example, Z1-Zn in FIG6 correspond to a third time interval respectively.

[0167] For example, the network device configures the same third time interval for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or belonging to the same master cell group (MCG, Master Cell Group), and / or belonging to the same secondary cell group (SCG, Secondary Cell Group). Figure 8 is an example diagram of configuring the third time interval in an embodiment of the present application. For example, the network device configures a time interval for multiple candidate target cells belonging to the same simultaneous TCI update list, rather than configuring a time interval for each of the candidate target cells. For each of the candidate target cells, the associated time interval is a configured time interval, for example, Zp is a configured third time interval mentioned above.

[0168] In addition, when the network device configures a third time interval for each of one or more configured candidate target cells, the third time interval configured for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or the same master cell group (MCG), and / or the same secondary cell group (SCG) is the same. For example, referring to the example in FIG. 7 , a repeated description is not given here.

[0169] For example, the network device configures a third time interval for one or more configured candidate target cells. FIG9 is another example diagram of configuring the third time interval in an embodiment of the present application. For example, Z in FIG9 .

[0170] In some embodiments, the third time interval is one or more symbols, where the one or more symbols are determined according to the first reference cell.

[0171] For example, reference may be made to the method for determining the first time interval described above, which will not be repeated here.

[0172] In some embodiments, a second time interval is reported for each of the one or more configured candidate target cells; or, the same second time interval is reported for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG, Master Cell Group), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group); or, a second time interval is reported for the one or more configured candidate target cells.

[0173] In some implementations, the first time interval associated with a candidate target cell is equal to the second time interval reported for the candidate target cell.

[0174] In some embodiments, when a second time interval is reported for each of the one or more configured candidate target cells, the second time interval reported by the candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG, Master Cell Group), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group) is the same.

[0175] For example, the terminal device determines the time interval Z in FIG4 for each candidate target cell, and reports the minimum time interval (second time interval Z) that each candidate target cell can support to the network device as the device capability.

[0176] For example, the network device determines a time interval (first time interval Z) for each candidate target cell based on the report of the terminal device, and configures it to the terminal device through RRC signaling. The time interval ultimately used by the terminal device is still the time interval configured by the network device.

[0177] The following are examples:

[0178] For example, the time interval associated with the candidate target cell is a second time interval reported by the terminal device side (also referred to as the reported "first time interval Z"). For example, the terminal device reports the minimum time interval (second time interval) that each candidate target cell can support to the network device as the device capability. The network device directly uses this time interval, that is, it no longer configures the third time interval for the terminal device. In this case, the time interval associated with the candidate target cell is the reported second time interval, that is, the time interval finally used by the terminal device is the time interval reported by itself.

[0179] For example, first, the terminal device is configured with one or more candidate target cells, then reports the second time interval for each candidate target cell, then the network device configures the third time interval for each candidate target cell, and the first time interval Z associated with each candidate target cell is the third time interval, and finally, the switching signaling is received. After the first time interval Z associated with the main target cell, the indicated beam is applied to the switched cell. After the cell switching is completed, the terminal device can report the second time interval Y for each serving cell, and then be configured with the third time interval Y associated with each serving cell. After receiving the beam indication signaling, the indicated beam is applied after the third time interval Y, that is, the ICBM of Rel-17 is used after the cell switching is completed.

[0180] For example, the terminal device reports a second time interval for each of the one or more configured candidate target cells. For example, still referring to Z1-Zn in FIG6 , they are the second time intervals reported by the terminal device.

[0181] For example, the terminal device reports the same third time interval for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or the same master cell group (MCG), and / or the same secondary cell group (SCG). For example, still with the help of Figure 8, the terminal device reports a time interval for multiple candidate target cells belonging to the same simultaneous TCI update list, rather than reporting a time interval for each of the candidate target cells. For each of the candidate target cells, the associated time intervals are all reported time intervals, for example, Zp is one of the above-mentioned second time intervals reported.

[0182] In addition, when the terminal device reports a second time interval for each of one or more configured candidate target cells: the third time interval reported by the candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG, Master Cell Group), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group) is the same. For example, reference can still be made to the example in Figure 7, and no repetition is given here.

[0183] For example, the terminal device reports a third time interval for one or more configured candidate target cells. For example, the terminal device does not distinguish candidate target cells and only reports a second time interval Z. For example, the terminal device can still report only a second time interval Z with reference to FIG9 .

[0184] In some implementations, the network device directly uses the second time interval reported by the terminal device, i.e., no longer configures the third time interval for the terminal device; optionally, the network device can also configure the third time interval based on the second time interval reported by the terminal device using any of the aforementioned methods.

[0185] For example, the network device and the terminal device directly use the second time interval as the first time interval associated with a candidate target cell; or, the network device configures a third time interval for the terminal device based on the report of the terminal device, and the first time interval associated with a candidate target cell ultimately used by the terminal device is still the time interval configured by the network device.

[0186] In some embodiments, the second time interval is one or more symbols, wherein the one or more symbols are determined according to the first reference cell.

[0187] For example, reference may be made to the method for determining the first time interval described above, which will not be repeated here.

[0188] In some embodiments, the method further includes: receiving third configuration information, wherein the third configuration information configures an inter-cell beam management mode or a cell switching mode.

[0189] For example, assume that the terminal device receives the TCI state indicated by the DCI, and the TCI state is associated with a non-service cell. If it is configured in inter-cell beam management mode, the terminal device does not perform cell switching, but performs beam switching, so that the beam of the non-service cell can be used. If it is configured in cell switching mode, the terminal device switches to the non-service cell associated with the TCI state, and performs beam switching to use the beam of the non-service cell. The non-service cell is one of the configured candidate target cells, so that the terminal device can quickly apply the configuration of the non-service cell after switching. If the terminal device is configured in cell switching mode, the DCI indicating the TCI state of the non-service cell is the signaling indicating the TCI state and cell switching.

[0190] In some embodiments, the first indication information is a first DCI and / or a first MAC CE.

[0191] In some implementations, the first DCI is a DCI without downlink allocation, and the CRC of the first DCI is scrambled using the CS-RNTI; or the first DCI is a DCI with downlink allocation, and the CRC of the first DCI is scrambled using the C-RNTI.

[0192] In some embodiments, the first indication information is a first DCI and a first MAC CE, wherein the first DCI is a DCI with downlink allocation, the CRC of the first DCI is scrambled using C-RNTI, the first DCI indicates the first TCI state, and the first MAC CE indicates cell switching.

[0193] In some embodiments, the first indication information further indicates a CS-RNTI, where the CS-RNTI scrambles a CRC of a second DCI used to update a TCI state.

[0194] For example, the first DCI indicating the TCI state of the non-serving cell is a DCI that schedules PDSCH, or is called DCI with DL assignment. The CRC of the first DCI is scrambled using C-RNTI. One or more fields of the first DCI, or one or more fields of the first MAC CE, can indicate that the terminal device needs to perform cell switching. The above-mentioned DCI and / or MAC CE is the signaling (first indication information) indicating the first TCI state and cell switching. The MAC CE is carried by the PDSCH scheduled by the DCI.

[0195] For example, a DCI indicating the TCI state of a non-serving cell is a DCI without a scheduled PDSCH, or DCI without DL assignment. The CRC of the DCI is scrambled using the CS-RNTI, and one or more fields of the DCI can indicate that the terminal device needs to perform a cell handover. The above DCI is the signaling indicating the TCI state and cell handover (first indication information). The MAC CE is carried by the PDSCH scheduled by the DCI.

[0196] In some implementations, the signaling indicating the TCI state and cell handover also indicates the CS-RNTI.

[0197] For example, in addition to indicating the target cell and TCI state used after the handover, the first indication information also indicates the CS-RNTI. DCI without downlink allocation can indicate the TCI state without data scheduling, that is, only indicate the beam without scheduling data, so that the TCI state can be updated more quickly and flexibly, that is, there is no need to wait until there is data scheduling to indicate the beam. The CRC of the above DCI is scrambled with CS-RNTI. However, after the cell handover, the CS-RNTI of the original serving cell has become invalid. In order to be able to quickly use the DCI whose CRC is scrambled by CS-RNTI to indicate the beam after the cell handover, the CS-RNTI can be indicated in the signaling indicating the TCI state and cell handover.

[0198] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0199] As can be seen from the above embodiment, a terminal device is configured with one or more candidate target cells, each of which is associated with a time interval. The terminal device is instructed to switch to a candidate target cell, and after the time interval associated with the candidate target cell, the TCI state associated with the candidate target cell is applied to the target cell. The invented method can avoid ambiguity between the terminal device and network equipment regarding when the TCI state can be applied to the cell after switching, thereby achieving fast beam switching and cell switching.

[0200] Embodiments of the second aspect

[0201] The embodiment of the present application provides an information receiving method, which is applied to a terminal device. The embodiment of the present application can be combined with the embodiment of the first aspect, or can be implemented independently. The contents that are the same as those of the embodiment of the first aspect are not repeated here.

[0202] FIG10 is another schematic diagram of the information receiving method according to an embodiment of the present application. As shown in FIG10 , the method includes:

[0203] 1001, receiving third indication information, where the third indication information indicates a fourth TCI state;

[0204] 1002. Apply the indicated fourth TCI state in the serving cell after at least a fourth time interval has passed after the last symbol of feedback information (HARQ-ACK) sent for the third indication information.

[0205] 1003, receiving fourth indication information, where the fourth indication information indicates cell handover;

[0206] 1004. After at least a fifth time interval after the reference symbol, the fourth TCI state indicated is applied in the switched cell, wherein the reference symbol is the last symbol of the fourth indication information, or the last symbol of the feedback information (HARQ-ACK) sent for the fourth indication information.

[0207] Thus, through the third and fourth indication information, the terminal device can apply the indicated fourth TCI state in the cell after the handover. This can avoid ambiguity between the terminal device and the network device regarding when the TCI state can be applied in the cell after the handover, thereby achieving fast beam switching and cell switching.

[0208] FIG11 is another schematic diagram of the signaling sending and receiving process of an embodiment of the present application

[0209] As shown in Figure 11, the terminal device first performs beam switching and then cell switching, and implements the TCI state indicated by the cell application after switching in two steps.

[0210] For example, the terminal device receives a third signaling indicating the TCI state, which only indicates beam switching but does not indicate cell switching, that is, it indicates the fourth TCI state. For example, the signaling can continue to use the TCI state indication signaling in the inter-cell beam management to instruct the terminal device to use the beam of the non-service cell, but does not switch the cell. Therefore, the terminal device applies the indicated fourth TCI state in the serving cell after at least the fourth time interval (Y) after the last symbol of the ACK for the third indication information. For more details, please refer to the existing technology for inter-cell beam management, which will not be repeated here. At this point, the terminal device completes the beam switching to the non-service cell. At some point later, the terminal device receives the fourth indication information indicating the cell switching, which only indicates the cell switching. In other words, the signaling does not indicate the TCI state, or does not indicate an updated TCI state. The terminal device needs to perform a cell switch so that it can apply the indicated TCI state in the non-service cell. The terminal device applies the indicated fourth TCI state in the switched cell at least fifth time interval (X) after the last symbol of the fourth indication information, or the terminal device applies the indicated fourth TCI state in the switched cell at least fifth time interval (X) after the last symbol of the ACK sent for the fourth indication information.

[0211] The network device may use any of the aforementioned methods for configuring the "third time interval" to configure the time interval X. The terminal device may use any of the aforementioned methods for reporting the "second time interval" to report the time interval X.

[0212] In some implementations, the embodiments of the second aspect may be combined with the embodiments of the first aspect, as described below.

[0213] FIG12 is another schematic diagram of the information receiving method according to an embodiment of the present application. As shown in FIG12 , the method includes:

[0214] 1201, receiving fifth indication information, where the fifth indication information indicates a fifth TCI state and cell switching;

[0215] 1202. Apply the indicated fifth TCI state in the cell after the handover after at least a sixth time interval has passed after the last symbol of the feedback information (HARQ-ACK) for the fifth indication information.

[0216] 1203, receiving sixth indication information, where the sixth indication information indicates a sixth TCI state;

[0217] 1204. Apply the indicated sixth TCI state in the serving cell after at least a seventh time interval has passed after the last symbol of the feedback information (HARQ-ACK) for the sixth indication information.

[0218] 1205, receiving seventh indication information, where the seventh indication information indicates cell switching;

[0219] 1206. After at least an eighth time interval after the reference symbol, the sixth TCI state indicated is applied in the switched cell, wherein the reference symbol is the last symbol of the seventh indication information, or the last symbol of the feedback information (HARQ-ACK) for the seventh indication information.

[0220] For example, the method shown in FIG12 is for the case where the scenarios of FIG11 and FIG4 coexist.

[0221] For example, the fifth TCI state is the same as the first TCI state of the embodiment of the first aspect; the sixth TCI state is the same as the fourth TCI state of the embodiment of the second aspect; the sixth time interval (Z) is the same as the first time interval (Z) of the embodiment of the first aspect; the seventh time interval (Y) is the same as the fourth time interval (Y) of the embodiment of the second aspect; and the eighth time interval (X) is the same as the fifth time interval (X) of the embodiment of the second aspect.

[0222] FIG13 is another schematic diagram of the signaling sending and receiving process of an embodiment of the present application.

[0223] As shown in FIG13 , after the sixth TCI state is indicated by the sixth indication information, the network device will instruct the terminal device to switch to the primary target cell through the seventh indication information or the fifth indication information. If the network device finds that a more suitable beam (corresponding to the fifth TCI state) can be applied to the primary target cell, that is, the beam of the primary target cell has changed and it is necessary to change the beam, as shown in the upper figure of FIG13 , then both the fifth TCI state and the cell switching can be indicated in the fifth indication information; that is, the TCI state indication and cell switching indication of FIG4 are applied on the basis of FIG11 , so that the appropriate beam can be switched to more quickly; in this case, it is equivalent to switching from the scenario of FIG11 to the scenario of FIG4 , and the terminal device applies the fifth TCI state in the primary target cell based on FIG4 and its related methods; if the network device finds that there is no need to change the beam, as shown in the lower figure of FIG13 , only the cell switching is indicated through the seventh indication information, and the sixth TCI state indicated by the sixth indication information is still applied.

[0224] In some implementations, the terminal device further reports a ninth time interval and a tenth time interval; and receives fourth configuration information, where the fourth configuration information configures an eleventh time interval, a twelfth time interval, and a thirteenth time interval.

[0225] For example, the ninth time interval and the tenth time interval are similar to the “second time interval” of the embodiment of the first aspect, and the eleventh time interval, the twelfth time interval, and the thirteenth time interval are similar to the “third time interval” of the embodiment of the first aspect.

[0226] For example, the ninth time interval corresponds to the "seventh time interval" (Y), the tenth time interval corresponds to the "eighth time interval" (X); and the eleventh time interval corresponds to the "eighth time interval" (X), the twelfth time interval corresponds to the "seventh time interval" (Y), and the thirteenth time interval corresponds to the "sixth time interval" (Z).

[0227] For example, the terminal device continues to use the existing technology of inter-cell beam management to report the "ninth time interval Y", and replaces the "second time interval Z" of the embodiment of the first aspect with the "tenth time interval X". The terminal device can use any of the methods for reporting the "second time interval Z" described above to report the "tenth time interval X". Based on the report of the terminal device, the network device determines the "twelfth time interval Y", "eleventh time interval X" and "thirteenth time interval Z", and configures them to the terminal device through RRC signaling. The network device can use any of the methods for configuring the "third time interval Z" described above to configure the "eleventh time interval X" and "thirteenth time interval Z".

[0228] For the previous embodiment, the terminal device reports the second time interval Z, and the network device determines and configures the third time interval Z based on the report. Unlike the previous embodiment, the terminal device here does not report the second time interval Z, but the network device can determine and configure the "thirteenth time interval Z" based on the reported "tenth time interval X" and "ninth time interval Y". This is because the "thirteenth time interval Z" includes the beam switching time and the cell switching time, the "tenth time interval X" includes the cell switching time, and the "ninth time interval Y" includes the beam switching time, and the network device can roughly infer Z based on X and Y. Without loss of generality, the terminal device can also report the "ninth time interval Y" and the "second time interval Z", and the network device determines and configures the "eleventh time interval X" based on the reports.

[0229] In addition, the network device configures the "eleventh time interval X", "twelfth time interval Y" and "thirteenth time interval Z", which is similar to the configuration of the "third time interval Z" in the embodiment of the first aspect.

[0230] It is worth noting that Figures 10-13 above are merely schematic illustrations of embodiments of the present application, using a terminal device as an example, but the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, other operations may be added or some operations may be removed, and the objects of the aforementioned operations may be adjusted. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the descriptions of Figures 10-12 above.

[0231] It is worth noting that Figures 10-13 above are merely schematic illustrations of embodiments of the present application, using a terminal device as an example, but the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, other operations may be added or some operations may be removed, and the objects of the aforementioned operations may be adjusted. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the descriptions of Figures 10-12 above.

[0232] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0233] As can be seen from the above embodiment, through the third indication information and the fourth indication information, the terminal device can apply the indicated fourth TCI state in the cell after the handover. This can avoid ambiguity between the terminal device and the network device regarding when the TCI state can be applied in the cell after the handover, thereby achieving fast beam switching and cell switching.

[0234] Embodiments of the third aspect

[0235] The embodiment of the present application provides an information sending method, which is applied to a network device side. The embodiment of the present application can be combined with the embodiment of the first aspect, or can be implemented independently. The content that is the same as the embodiment of the first aspect is not repeated here.

[0236] FIG14 is a schematic diagram of a method for sending information according to an embodiment of the present application. As shown in FIG14 , the method includes:

[0237] 1401: Send first indication information, where the first indication information indicates a first TCI state and cell switching;

[0238] 1402. Receive feedback information (HARQ-ACK); wherein the first TCI state is used to apply the indicated first TCI state in the switched cell after at least a first time interval has passed after the last symbol of the feedback information (HARQ-ACK).

[0239] In some implementations, the method further includes: sending first configuration information, wherein the first configuration information configures one or more candidate target cells.

[0240] In some embodiments, the method further includes: sending second configuration information, wherein the second configuration information configures a third time interval for each of the one or more candidate target cells configured by the first configuration information, and the first time interval associated with a candidate target cell is equal to the configured third time interval; or, the second configuration information configures the same third time interval for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group); or, the second configuration information configures a third time interval for the configured one or more candidate target cells.

[0241] In some embodiments, the method further includes: sending third configuration information, wherein the third configuration information configures an inter-cell beam management mode or a cell switching mode.

[0242] It is worth noting that FIG14 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG14 above.

[0243] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0244] As can be seen from the above embodiment, a terminal device is configured with one or more candidate target cells, each of which is associated with a time interval. The terminal device is instructed to switch to a candidate target cell, and after the time interval associated with the candidate target cell, the TCI state associated with the candidate target cell is applied to the target cell. The invented method can avoid ambiguity between the terminal device and network equipment regarding when the TCI state can be applied to the cell after switching, thereby achieving fast beam switching and cell switching.

[0245] Embodiments of the fourth aspect

[0246] The embodiment of the present application provides an information transmission method, which is applied to a network device side. The embodiment of the present application can be combined with the embodiment of the second aspect, or can be implemented independently. The content that is the same as the embodiment of the second aspect is not repeated here.

[0247] FIG15 is another schematic diagram of the information sending method according to an embodiment of the present application. As shown in FIG15 , the method includes:

[0248] 1501, sending third indication information, where the third indication information indicates a fourth TCI state;

[0249] 1502. Receive feedback information (HARQ-ACK) for the third indication information, wherein, after at least a fourth time interval has passed after the last symbol of the feedback information (HARQ-ACK) for the third indication information, the terminal device applies the indicated fourth TCI state in the serving cell;

[0250] 1503, sending fourth indication information, where the fourth indication information indicates cell handover;

[0251] 1504. After at least a fifth time interval after the reference symbol, the terminal device applies the fourth TCI state indicated in the switched cell, wherein the reference symbol is the last symbol of the fourth indication information, or the last symbol of the feedback information (HARQ-ACK) for the fourth indication information.

[0252] Thus, through the third and fourth indication information, the terminal device can apply the indicated fourth TCI state in the cell after the handover. This can avoid ambiguity between the terminal device and the network device regarding when the TCI state can be applied in the cell after the handover, thereby achieving fast beam switching and cell switching.

[0253] FIG16 is another schematic diagram of the information sending method according to an embodiment of the present application. As shown in FIG16 , the method includes:

[0254] 1601: Send fifth indication information, where the fifth indication information indicates a fifth TCI state and cell switching.

[0255] 1602. Receive feedback information (HARQ-ACK) for the fifth indication information, wherein, after at least a sixth time interval has passed after the last symbol of the feedback information (HARQ-ACK) sent for the fifth indication information, the terminal device applies the indicated fifth TCI state in the switched cell.

[0256] 1603: Send sixth indication information, where the sixth indication information indicates a sixth TCI state;

[0257] 1604: Receive feedback information (HARQ-ACK) for the sixth indication information, wherein, after at least a seventh time interval has passed after the last symbol of the feedback information (HARQ-ACK) sent for the sixth indication information, the terminal device applies the indicated sixth TCI state in the serving cell;

[0258] 1605: Send seventh indication information, where the seventh indication information indicates cell handover;

[0259] 1606. After at least an eighth time interval after the reference symbol, the terminal device applies the indicated sixth TCI state in the switched cell, wherein the reference symbol is the last symbol of the seventh indication information, or the last symbol of the feedback information (HARQ-ACK) for the seventh indication information.

[0260] It is worth noting that Figures 15 and 16 above are merely illustrative of the embodiments of the present application and are not intended to be limiting. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be omitted. Those skilled in the art may make appropriate modifications based on the above description and are not limited to the descriptions of Figures 15 and 16 above.

[0261] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0262] As can be seen from the above embodiment, through the third indication information and the fourth indication information, the terminal device can apply the indicated fourth TCI state in the cell after the handover. This can avoid ambiguity between the terminal device and the network device regarding when the TCI state can be applied in the cell after the handover, thereby achieving fast beam switching and cell switching.

[0263] Embodiments of the fifth aspect

[0264] The embodiment of the present application provides an information receiving device, which may be, for example, a terminal device, or one or more components or assemblies configured in the terminal device, and the same contents as those in the embodiment of the first aspect will not be repeated.

[0265] FIG17 is a schematic diagram of an information receiving device according to an embodiment of the present application. As shown in FIG17 , the information receiving device 1700 includes:

[0266] The receiving unit 1701 receives first indication information, wherein the first indication information indicates a first TCI state and a cell handover.

[0267] A sending unit 1702 sends feedback information (HARQ-ACK); wherein, after at least a first time interval has passed after the last symbol of the feedback information (HARQ-ACK), the first TCI state indicated is applied in the switched cell.

[0268] In some implementations, the receiving unit 1701 further receives first configuration information, where the first configuration information configures one or more candidate target cells.

[0269] In some implementations, the first indication information indicates one candidate target cell as the primary target cell among the configured one or more candidate target cells.

[0270] In some embodiments, each of the configured one or more candidate target cells is associated with a first time interval, and the at least first time interval includes the first time interval associated with the primary target cell.

[0271] In some implementations, the indicated first TCI state is associated with a cell, and the cell is the primary target cell, or a cell other than the primary target cell.

[0272] In some embodiments, the switched cell includes: the main target cell; or, the main target cell and one or more candidate target cells other than the main target cell, wherein the main target cell and one or more candidate target cells other than the main target cell belong to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or belong to the same main cell group (MCG, Master Cell Group), and / or belong to the same secondary cell group (SCG, Secondary Cell Group).

[0273] In some embodiments, the first time interval associated with candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG), and / or, belonging to the same secondary cell group (SCG), is the same.

[0274] In some embodiments, the first time interval associated with the candidate target cell is one or more symbols, which are determined based on a first reference cell, and the first reference cell includes one of the following: the candidate target cell associated with the first time interval; the candidate target cell associated with the first time interval belongs to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belongs to the same master cell group (MCG), and / or, belongs to the same secondary cell group (SCG, Secondary Cell Group) with the smallest subcarrier spacing among the candidate target cells; the candidate target cell with the smallest subcarrier spacing among the configured one or more candidate target cells; the serving cell with the smallest subcarrier spacing among the serving cells.

[0275] In some embodiments, starting from the first time slot after at least the first time interval (Z) after the last symbol of the feedback information (HARQ-ACK), the first TCI state indicated is applied in the switched cell, wherein the first time slot is determined based on a second reference cell, and the second reference cell includes one of the following: the main target cell; the cell with the smallest subcarrier spacing in the switched cell.

[0276] In some embodiments, the receiving unit 1701 also receives second configuration information, wherein the second configuration information configures a third time interval for each of the one or more candidate target cells configured; or, the second configuration information configures the same third time interval for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG, Master Cell Group), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group); or, the second configuration information configures a third time interval for the one or more candidate target cells configured.

[0277] In some implementations, the first time interval associated with a candidate target cell is equal to the third time interval configured for the candidate target cell.

[0278] In some embodiments, where the second configuration information configures a third time interval for each of the one or more candidate target cells configured, the third time interval configured for the candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG), and / or, belonging to the same secondary cell group (SCG), is the same.

[0279] In some embodiments, the third time interval is one or more symbols, wherein the one or more symbols are determined according to the first reference cell.

[0280] In some embodiments, the information receiving device 1700 also includes: a reporting unit 1703, which reports a second time interval for each of the one or more configured candidate target cells; or, it reports the same second time interval for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG, Master Cell Group), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group); or, it reports a second time interval for the configured one or more candidate target cells.

[0281] In some implementations, the first time interval associated with a candidate target cell is equal to the second time interval reported for the candidate target cell.

[0282] In some embodiments, where a second time interval is reported for each of the one or more configured candidate target cells, the second time interval reported by the candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG), and / or, belonging to the same secondary cell group (SCG), is the same.

[0283] In some embodiments, the second time interval is one or more symbols, wherein the one or more symbols are determined according to the first reference cell.

[0284] In some embodiments, the first TCI state is applied to at least one of the following channels or signals of the primary target cell: SSB; PRACH; Type 1 physical downlink control channel common search space set Type1-PDCCH CSS set; CORESET associated with Type1-PDCCH CSS set; Type 2 physical downlink control channel common search space set Type2-PDCCH CSS set; CORESET associated with Type2-PDCCH CSS set; PUSCH scheduled by random access response uplink grant RAR (Random Access Response) UL grant.

[0285] In some embodiments, the receiving unit 1701 receives second indication information after receiving the first indication information, wherein the second indication information indicates a second TCI state; wherein, when a first cell set to which the indicated first TCI state is applied is a subset of a second cell set to which the indicated second TCI state is applied, the indicated second TCI state is applied on the second cell set, wherein the second TCI state is the same as the first TCI state.

[0286] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0287] It is worth noting that the above description only describes the components or modules related to the present application, but the present application is not limited thereto. The information receiving device 1700 may also include other components or modules. For the specific contents of these components or modules, reference may be made to the relevant art.

[0288] In addition, for the sake of simplicity, FIG17 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0289] As can be seen from the above embodiment, when a terminal device is instructed to switch to a candidate target cell, the TCI state associated with the candidate target cell is applied to the target cell after a time interval associated with the candidate target cell. This method avoids ambiguity between the terminal device and network equipment regarding when the TCI state can be applied to the cell after switching, thereby achieving rapid beam switching and cell switching.

[0290] Embodiments of the sixth aspect

[0291] The embodiment of the present application provides an information receiving device, which may be, for example, a terminal device, or one or more components or assemblies configured in the terminal device; in addition, the same contents as those in the embodiment of the second aspect are not repeated here.

[0292] FIG18 is another schematic diagram of an information receiving device according to an embodiment of the present application. As shown in FIG18 , the information receiving device 1800 includes:

[0293] A second receiving unit 1801 is configured to receive third indication information, wherein the third indication information indicates a fourth TCI state;

[0294] The second sending unit 1802 sends feedback information (HARQ-ACK) for the third indication information, wherein, after at least a fourth time interval has passed after the last symbol of the feedback information (HARQ-ACK) sent for the third indication information, the fourth TCI state indicated is applied in the serving cell; the second receiving unit 1801 also receives fourth indication information, wherein the fourth indication information indicates cell switching; after at least a fifth time interval has passed after a reference symbol, the fourth TCI state indicated is applied in the switched cell, wherein the reference symbol is the last symbol of the fourth indication information, or is the last symbol of the feedback information (HARQ-ACK) sent by the second sending unit 1802 for the fourth indication information.

[0295] Thus, through the third and fourth indication information, the terminal device can apply the indicated fourth TCI state in the cell after the handover. This can avoid ambiguity between the terminal device and the network device regarding when the TCI state can be applied in the cell after the handover, thereby achieving fast beam switching and cell switching.

[0296] In some implementations, the embodiment of the fifth aspect can be combined with the embodiment of the sixth aspect to execute the method shown in Figure 12, which will not be repeated here.

[0297] For example, the reporting unit 1703 and / or the second reporting unit (not shown in Figure 18) configured in the information receiving device 1800 can also report the ninth time interval and the tenth time interval; the receiving unit 1701 and / or the second receiving unit 1801 also receives fourth configuration information, and the fourth configuration information configures the eleventh time interval, the twelfth time interval and the thirteenth time interval.

[0298] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0299] It is worth noting that the above description only describes the components or modules related to the present application, but the present application is not limited thereto. The information receiving device 1800 may also include other components or modules. For the specific contents of these components or modules, reference may be made to the relevant art.

[0300] In addition, for the sake of simplicity, FIG18 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0301] As can be seen from the above embodiment, through the third indication information and the fourth indication information, the terminal device can apply the indicated fourth TCI state in the cell after the handover. This can avoid ambiguity between the terminal device and the network device regarding when the TCI state can be applied in the cell after the handover, thereby achieving fast beam switching and cell switching.

[0302] Embodiments of the seventh aspect

[0303] The embodiment of the present application provides an information sending device, which may be, for example, a network device, or one or more components or assemblies configured on the network device, and the same contents as those in the embodiment of the first aspect will not be repeated.

[0304] FIG19 is a schematic diagram of an information sending device according to an embodiment of the present application. As shown in FIG19 , the information sending device 1900 includes:

[0305] The third sending unit 1901 sends first indication information, wherein the first indication information indicates a first TCI state and a cell handover.

[0306] The third receiving unit 1902 receives feedback information (HARQ-ACK); wherein the first TCI state is used to apply the indicated first TCI state in the switched cell after at least a first time interval after the last symbol of the feedback information (HARQ-ACK).

[0307] A terminal device is instructed to switch to a candidate target cell. After a time interval associated with the candidate target cell, the TCI state associated with the candidate target cell is applied to the target cell. This method avoids ambiguity between the terminal device and network equipment regarding when the TCI state can be applied to the cell after the handover, thereby enabling fast beam switching and cell switching.

[0308] In some implementations, the third sending unit 1901 further sends first configuration information, where the first configuration information configures one or more candidate target cells.

[0309] Send second configuration information, wherein the third sending unit 1901 also sends second configuration information, and the second configuration information configures a third time interval for each of the one or more candidate target cells configured by the first configuration information, and the first time interval associated with a candidate target cell is equal to the configured third time interval; or, the second configuration information configures the same third time interval for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same main cell group (MCG, Master Cell Group), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group); or, the second configuration information configures a third time interval for the configured one or more candidate target cells.

[0310] In some implementations, the third sending unit 1901 further sends third configuration information, where the third configuration information configures an inter-cell beam management mode or a cell switching mode.

[0311] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0312] It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The information sending device 1900 may also include other components or modules. For the specific contents of these components or modules, reference may be made to the relevant art.

[0313] In addition, for the sake of simplicity, FIG19 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0314] As can be seen from the above embodiment, when a terminal device is instructed to switch to a candidate target cell, the TCI state associated with the candidate target cell is applied to the target cell after a time interval associated with the candidate target cell. This method avoids ambiguity between the terminal device and network equipment regarding when the TCI state can be applied to the cell after switching, thereby achieving rapid beam switching and cell switching.

[0315] Embodiments of the eighth aspect

[0316] The embodiment of the present application provides an information sending device, which may be, for example, a network device, or one or more components or assemblies configured on the network device, and the same contents as those in the embodiment of the second aspect will not be repeated.

[0317] FIG20 is another schematic diagram of an information sending device according to an embodiment of the present application. As shown in FIG20 , the information sending device 2000 includes:

[0318] a fourth sending unit 2001, configured to send third indication information, wherein the third indication information indicates a fourth TCI state;

[0319] a fourth receiving unit 2002, which receives feedback information (HARQ-ACK) for the third indication information, wherein, after at least a fourth time interval has passed after the last symbol of the feedback information (HARQ-ACK) for the third indication information, the terminal device applies the indicated fourth TCI state in the serving cell;

[0320] The fourth sending unit 2001 further sends fourth indication information, wherein the fourth indication information indicates cell switching;

[0321] In which, after at least the fifth time interval after the reference symbol, the terminal device applies the indicated fourth TCI state in the switched cell, wherein the reference symbol is the last symbol of the fourth indication information, or the last symbol of the feedback information (HARQ-ACK) for the fourth indication information.

[0322] Thus, through the third and fourth indication information, the terminal device can apply the indicated fourth TCI state in the cell after the handover. This can avoid ambiguity between the terminal device and the network device regarding when the TCI state can be applied in the cell after the handover, thereby achieving fast beam switching and cell switching.

[0323] In some implementations, the embodiment of the seventh aspect can be combined with the embodiment of the eighth aspect to execute the method shown in Figure 16, which will not be repeated here.

[0324] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0325] It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The information sending device 2000 may also include other components or modules. For the specific contents of these components or modules, reference may be made to the relevant art.

[0326] In addition, for the sake of simplicity, FIG20 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0327] As can be seen from the above embodiment, through the third indication information and the fourth indication information, the terminal device can apply the indicated fourth TCI state in the cell after the handover. This can avoid ambiguity between the terminal device and the network device regarding when the TCI state can be applied in the cell after the handover, thereby achieving fast beam switching and cell switching.

[0328] Embodiments of the ninth aspect

[0329] An embodiment of the present application also provides a communication system, and reference may be made to FIG1 . The contents that are the same as those in the embodiments of the first to eighth aspects will not be repeated.

[0330] In some implementations, the communication system 100 may include at least: a network device and a terminal device, wherein:

[0331] The network device sends first indication information, wherein the first indication information indicates a first TCI state and a cell handover; and receives feedback information (HARQ-ACK);

[0332] The terminal device receives the first indication information; and sends the feedback information (HARQ-ACK), wherein, after at least a first time interval has passed after the last symbol of the feedback information (HARQ-ACK), the first TCI state indicated is applied in the switched cell.

[0333] In some implementations, the communication system 100 may further include at least: a network device and a terminal device, wherein:

[0334] The network device sends third indication information, wherein the third indication information indicates a fourth TCI state; and receives feedback information (HARQ-ACK) for the third indication information, wherein after at least a fourth time interval passes after a last symbol of the feedback information (HARQ-ACK) for the third indication information, the terminal device applies the indicated fourth TCI state in a serving cell;

[0335] The network device also sends a fourth indication information, wherein the fourth indication information indicates a cell switch; wherein, after at least a fifth time interval after the reference symbol, the terminal device applies the indicated fourth TCI state in the switched cell, wherein the reference symbol is the last symbol of the fourth indication information, or the last symbol of the feedback information (HARQ-ACK) for the fourth indication information.

[0336] In some implementations, the communication system 100 may further include at least: a network device and a terminal device, wherein:

[0337] The network device sends fifth indication information, wherein the fifth indication information indicates a fifth TCI state and cell switching; and receives feedback information (HARQ-ACK) for the fifth indication information, wherein after at least a sixth time interval elapses after a last symbol of the feedback information (HARQ-ACK) sent for the fifth indication information, the terminal device applies the indicated fifth TCI state in a post-switching cell;

[0338] The network device further sends sixth indication information, wherein the sixth indication information indicates a sixth TCI state;

[0339] receiving feedback information (HARQ-ACK) for the sixth indication information, wherein, after at least a seventh time interval has passed after the last symbol of the feedback information (HARQ-ACK) sent for the sixth indication information, the terminal device applies the indicated sixth TCI state in the serving cell;

[0340] The network device further sends seventh indication information, wherein the seventh indication information indicates cell switching;

[0341] In which, after at least an eighth time interval after the reference symbol, the terminal device applies the indicated sixth TCI state in the switched cell, wherein the reference symbol is the last symbol of the seventh indication information, or the last symbol of the feedback information (HARQ-ACK) for the seventh indication information.

[0342] An embodiment of the present application further provides a network device, which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.

[0343] Figure 21 is a schematic diagram of the structure of a network device according to an embodiment of the present application. As shown in Figure 21, network device 2100 may include a processor 2110 (e.g., a central processing unit (CPU)) and a memory 2120; the memory 2120 is coupled to the processor 2110. The memory 2120 may store various data and may also store an information processing program 2930, which is executed under the control of the processor 2110.

[0344] In addition, as shown in Figure 21, network device 2100 may further include: a transceiver 2140 and an antenna 2150; wherein, the functions of the above components are similar to those in the prior art and are not described here in detail. It is worth noting that network device 2100 does not necessarily include all the components shown in Figure 21; in addition, network device 2100 may also include components not shown in Figure 21, and reference may be made to the prior art for details.

[0345] The embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.

[0346] Figure 22 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in Figure 22, terminal device 2200 may include a processor 2210 and a memory 2220. Memory 2220 stores data and programs and is coupled to processor 2210. It should be noted that this diagram is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunications or other functions.

[0347] For example, the processor 2210 may be configured to execute a program to implement the information receiving method as described in the embodiment of the first aspect or the embodiment of the second aspect. For example, the processor 2210 may be configured to perform the following control: receiving first indication information, wherein the first indication information indicates a first TCI state and a cell switch, sending feedback information (HARQ-ACK); and applying the indicated first TCI state in the cell after the switch after at least a first time interval has passed after the last symbol of the feedback information (HARQ-ACK).

[0348] As shown in Figure 22 , the terminal device 2200 may further include: a communication module 2230, an input unit 2240, a display 2250, and a power supply 2260. The functions of these components are similar to those in the prior art and are not described in detail here. It is worth noting that the terminal device 2200 does not necessarily include all of the components shown in Figure 22 , and these components are not essential. Furthermore, the terminal device 2200 may also include components not shown in Figure 22 , for which reference may be made to the prior art.

[0349] An embodiment of the present application also provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the information receiving method described in the embodiments of the first aspect to the second aspect.

[0350] An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the information receiving method described in the embodiments of the first aspect to the second aspect.

[0351] An embodiment of the present application also provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the information sending method described in the embodiments of the third aspect to the fourth aspect.

[0352] An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the information sending method described in the embodiments of the third aspect to the fourth aspect.

[0353] The above devices and methods of the present application can be implemented by hardware or by a combination of hardware and software. The present application relates to such a computer-readable program that, when executed by a logic component, enables the logic component to implement the devices or components described above, or enables the logic component to implement the various methods or steps described above. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0354] The method / device described in conjunction with the embodiments of the present application can be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and / or one or more combinations of functional block diagrams can correspond to various software modules of the computer program flow or to various hardware modules. These software modules can respectively correspond to the various steps shown in the figure. These hardware modules can be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).

[0355] The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so that the processor can read information from and write information to the storage medium; or the storage medium may be an integral part 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 that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a 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.

[0356] One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may be implemented as 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 appropriate combination thereof for performing the functions described in this application. One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0357] The present application has been described above in conjunction with specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present application. Those skilled in the art may make various modifications and variations to the present application based on the spirit and principles of the present application, and such modifications and variations are also within the scope of the present application.

[0358] Regarding the implementation methods including the above embodiments, the following additional notes are also disclosed:

[0359] 1. A method for receiving information, applied to a terminal device, wherein the method comprises:

[0360] receiving first indication information, wherein the first indication information indicates a first TCI state and a cell handover,

[0361] Send feedback information (HARQ-ACK);

[0362] After at least a first time interval has passed after the last symbol of the feedback information (HARQ-ACK), the indicated first TCI state is applied in the cell after the handover.

[0363] 2. The method according to Supplement 1, wherein the method further comprises:

[0364] First configuration information is received, where the first configuration information configures one or more candidate target cells.

[0365] 3. The method according to Note 2, wherein the first indication information indicates a candidate target cell as the primary target cell among the one or more configured candidate target cells.

[0366] 4. The method according to Note 3, wherein each of the one or more configured candidate target cells is associated with a first time interval, and the at least first time interval includes the first time interval associated with the main target cell.

[0367] 5. The method according to Note 3, wherein the indicated first TCI state is associated with a cell, and the cell is the primary target cell, or a cell other than the primary target cell.

[0368] 6. The method according to Supplementary Note 3, wherein the cell after the handover includes:

[0369] the primary target cell; or,

[0370] The main target cell and one or more candidate target cells other than the main target cell, wherein the main target cell and one or more candidate target cells other than the main target cell belong to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or belong to the same main cell group (MCG, Master Cell Group), and / or belong to the same secondary cell group (SCG, Secondary Cell Group).

[0371] 7. The method according to Note 4, wherein the first time interval associated with the candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG, Master Cell Group), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group) is the same.

[0372] 8. The method according to Note 4, wherein the first time interval associated with the candidate target cell is one or more symbols, wherein the one or more symbols are determined based on a first reference cell, and the first reference cell includes one of the following:

[0373] the candidate target cell associated with the first time interval;

[0374] The candidate target cell associated with the first time interval belongs to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or belongs to the same master cell group (MCG), and / or belongs to the same secondary cell group (SCG) (Secondary Cell Group) and has the smallest subcarrier spacing among the candidate target cells;

[0375] the candidate target cell with the smallest subcarrier spacing among the one or more configured candidate target cells; or

[0376] The serving cell with the smallest subcarrier spacing among the serving cells.

[0377] 9. The method according to Note 6, wherein, starting from the first time slot after at least the first time interval (Z) after the last symbol of the feedback information (HARQ-ACK), the first TCI state indicated is applied in the cell after the handover,

[0378] The first time slot is determined according to a second reference cell, and the second reference cell includes one of the following:

[0379] the primary target cell;

[0380] The cell with the smallest subcarrier spacing among the switched cells.

[0381] 10. The method according to Supplementary Note 8, wherein the method further comprises:

[0382] Receive second configuration information, wherein:

[0383] The second configuration information configures a third time interval for each of the one or more configured candidate target cells; or

[0384] The second configuration information configures a same third time interval for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or the same master cell group (MCG), and / or the same secondary cell group (SCG); or

[0385] The second configuration information configures a third time interval for the configured one or more candidate target cells.

[0386] 11. The method according to Note 10, wherein the first time interval associated with a candidate target cell is equal to the third time interval configured for the candidate target cell.

[0387] 12. The method according to note 10, wherein, when the second configuration information configures a third time interval for each of the one or more candidate target cells:

[0388] The third time interval configured for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG), and / or, belonging to the same secondary cell group (SCG), is the same.

[0389] 13. According to the method described in any one of Notes 10-12, the third time interval is one or more symbols, wherein the one or more symbols are determined based on the first reference cell.

[0390] 14. The method according to Supplementary Note 8, further comprising:

[0391] reporting a second time interval for each of the one or more configured candidate target cells; or

[0392] reporting the same second time interval for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or the same master cell group (MCG), and / or the same secondary cell group (SCG); or

[0393] A second time interval is reported for the configured one or more candidate target cells.

[0394] 15. The method according to Note 14, wherein the first time interval associated with a candidate target cell is equal to the second time interval reported for the candidate target cell.

[0395] 16. A method according to Note 14, wherein, when reporting a second time interval for each of the one or more configured candidate target cells, the second time interval reported by the candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group) is the same.

[0396] 17. According to the method described in any one of Notes 14-16, the second time interval is one or more symbols, wherein the one or more symbols are determined based on the first reference cell.

[0397] 18. The method according to Supplementary Note 3, wherein the method further comprises:

[0398] The first TCI state is applied to at least one of the following channels or signals of the primary target cell:

[0399] SSB;

[0400] PRACH;

[0401] Type 1 physical downlink control channel common search space set Type1-PDCCH CSS set;

[0402] CORESET associated with Type1-PDCCH CSS set;

[0403] Type 2 physical downlink control channel common search space set Type2-PDCCH CSS set;

[0404] CORESET associated with the Type2-PDCCH CSS set; or

[0405] PUSCH scheduled by Random Access Response (RAR) UL grant.

[0406] 19. The method according to Supplementary Note 1, wherein the method further comprises:

[0407] receiving second indication information after receiving the first indication information, wherein the second indication information indicates a second TCI state;

[0408] In a case where a first cell set to which the indicated first TCI state is applied is a subset of a second cell set to which the indicated second TCI state is applied, the indicated second TCI state is applied on the second cell set.

[0409] 20. The method according to Note 19, wherein the second TCI state is the same as the first TCI state.

[0410] 21. The method according to Note 3, wherein each of the one or more candidate target cells configured is associated with a first time interval, and the at least first time interval includes the maximum time interval among the first time intervals associated with the master target cell and the candidate target cell belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG, Master Cell Group), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group).

[0411] 22. The method according to any one of Notes 1 to 21, further comprising:

[0412] Receive third configuration information, where the third configuration information configures an inter-cell beam management mode or a cell switching mode.

[0413] 23. The method according to any one of Notes 1-22, wherein the first indication information is a first DCI and / or a first MAC CE.

[0414] 24. The method according to Note 23, wherein:

[0415] The first indication information is a first DCI, wherein the first DCI is a DCI without downlink allocation, and the CRC of the first DCI is scrambled using a CS-RNTI, or the first DCI is a DCI with downlink allocation, and the CRC of the first DCI is scrambled using a C-RNTI.

[0416] 25. The method according to Supplement 23, wherein:

[0417] The first indication information is a first DCI and a first MAC CE, wherein the first DCI is a DCI with downlink allocation, the CRC of the first DCI is scrambled using C-RNTI, the first DCI indicates the first TCI state, and the first MAC CE indicates cell switching.

[0418] 26. A method according to any one of Notes 1-25, wherein the first indication information further indicates a CS-RNTI, wherein the CS-RNTI scrambles the CRC of the second DCI used to update the TCI state.

[0419] 27. The method according to any one of Notes 1-26, wherein the indicated first TCI state is different from a third TCI state indicated to the terminal device before the terminal device is indicated with the first TCI state.

[0420] 28. A method for receiving information, applied to a terminal device, wherein the method comprises:

[0421] receiving third indication information, wherein the third indication information indicates a fourth TCI state;

[0422] Applying the indicated fourth TCI state in the serving cell after at least a fourth time interval has passed after the last symbol of feedback information (HARQ-ACK) sent for the third indication information;

[0423] receiving fourth indication information, wherein the fourth indication information indicates cell switching;

[0424] After at least a fifth time interval after the reference symbol, the fourth TCI state indicated is applied in the switched cell, wherein the reference symbol is the last symbol of the fourth indication information, or the last symbol of the feedback information (HARQ-ACK) sent for the fourth indication information.

[0425] 29. A method for receiving information, applied to a terminal device, wherein the method comprises:

[0426] receiving fifth indication information, wherein the fifth indication information indicates a fifth TCI state and a cell handover,

[0427] After at least a sixth time interval has passed after the last symbol of the feedback information (HARQ-ACK) for the fifth indication information, applying the indicated fifth TCI state in the cell after the handover,

[0428] receiving sixth indication information, wherein the sixth indication information indicates a sixth TCI state;

[0429] Applying the indicated sixth TCI state in the serving cell after at least a seventh time interval has passed after the last symbol of the feedback information (HARQ-ACK) for the sixth indication information;

[0430] receiving seventh indication information, wherein the seventh indication information indicates cell switching;

[0431] After at least an eighth time interval after the reference symbol, the indicated sixth TCI state is applied in the switched cell, wherein the reference symbol is the last symbol of the seventh indication information, or the last symbol of the feedback information (HARQ-ACK) for the seventh indication information.

[0432] 30. The method according to Supplementary Note 29, further comprising:

[0433] Report the ninth and tenth time intervals;

[0434] Fourth configuration information is received, where the fourth configuration information configures an eleventh time interval, a twelfth time interval, and a thirteenth time interval.

[0435] 31. A method for sending information, applied to a network device, wherein the method comprises:

[0436] Sending first indication information, wherein the first indication information indicates a first TCI state and cell switching,

[0437] Receive feedback information (HARQ-ACK);

[0438] The first TCI state is used to apply the indicated first TCI state in the cell after switching after at least a first time interval has passed after the last symbol of the feedback information (HARQ-ACK).

[0439] 32. The method according to Supplementary Note 31, further comprising:

[0440] First configuration information is sent, where the first configuration information configures one or more candidate target cells.

[0441] 33. The method according to Supplementary Note 31, further comprising:

[0442] Sending second configuration information, wherein:

[0443] The second configuration information configures a third time interval for each of the one or more candidate target cells configured by the first configuration information, and the first time interval associated with a candidate target cell is equal to the configured third time interval; or

[0444] The second configuration information configures a same third time interval for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or the same master cell group (MCG), and / or the same secondary cell group (SCG); or

[0445] The second configuration information configures a third time interval for the configured one or more candidate target cells.

[0446] 34. The method according to Supplementary Note 31, wherein the method further comprises:

[0447] Send third configuration information, where the third configuration information configures an inter-cell beam management mode or a cell switching mode.

[0448] 35. A method for sending information, applied to a network device, wherein the method comprises:

[0449] Sending third indication information, wherein the third indication information indicates a fourth TCI state;

[0450] receiving feedback information (HARQ-ACK) for the third indication information, wherein, after at least a fourth time interval has passed after the last symbol of the feedback information (HARQ-ACK) for the third indication information, the terminal device applies the indicated fourth TCI state in the serving cell;

[0451] Sending fourth indication information, wherein the fourth indication information indicates cell switching;

[0452] In which, after at least the fifth time interval after the reference symbol, the terminal device applies the indicated fourth TCI state in the switched cell, wherein the reference symbol is the last symbol of the fourth indication information, or the last symbol of the feedback information (HARQ-ACK) for the fourth indication information.

[0453] 36. A method for sending information, applied to a network device, wherein the method comprises:

[0454] Sending fifth indication information, wherein the fifth indication information indicates a fifth TCI state and cell switching,

[0455] receiving feedback information (HARQ-ACK) for the fifth indication information, wherein, after at least a sixth time interval has passed after the last symbol of the feedback information (HARQ-ACK) sent for the fifth indication information, the terminal device applies the indicated fifth TCI state in the switched cell,

[0456] Sending sixth indication information, wherein the sixth indication information indicates a sixth TCI state;

[0457] receiving feedback information (HARQ-ACK) for the sixth indication information, wherein, after at least a seventh time interval has passed after the last symbol of the feedback information (HARQ-ACK) sent for the sixth indication information, the terminal device applies the indicated sixth TCI state in the serving cell;

[0458] Sending seventh indication information, wherein the seventh indication information indicates cell switching;

[0459] In which, after at least the eighth time interval after the reference symbol, the terminal device applies the indicated sixth TCI state in the switched cell, wherein the reference symbol is the last symbol of the seventh indication information, or the last symbol of the feedback information (HARQ-ACK) for the seventh indication information.

[0460] 37. A terminal device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the information receiving method as described in any one of Notes 1 to 30.

[0461] 38. A network device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the information sending method as described in any one of Notes 31 to 36.

[0462] 39. A communication system comprising: a network device and a terminal device, wherein:

[0463] The network device sends first indication information, wherein the first indication information indicates a first TCI state and a cell handover; and receives feedback information (HARQ-ACK);

[0464] The terminal device receives the first indication information; and sends the feedback information (HARQ-ACK), wherein, after at least a first time interval has passed after the last symbol of the feedback information (HARQ-ACK), the first TCI state indicated is applied in the switched cell.

[0465] 40. A communication system comprising: a network device and a terminal device, wherein:

[0466] The network device sends third indication information, wherein the third indication information indicates a fourth TCI state; and receives feedback information (HARQ-ACK) for the third indication information, wherein after at least a fourth time interval passes after a last symbol of the feedback information (HARQ-ACK) for the third indication information, the terminal device applies the indicated fourth TCI state in a serving cell;

[0467] The network device also sends a fourth indication information, wherein the fourth indication information indicates a cell switch; wherein, after at least a fifth time interval after the reference symbol, the terminal device applies the indicated fourth TCI state in the switched cell, wherein the reference symbol is the last symbol of the fourth indication information, or the last symbol of the feedback information (HARQ-ACK) for the fourth indication information.

[0468] 41. A communication system comprising: a network device and a terminal device, wherein:

[0469] The network device sends fifth indication information, wherein the fifth indication information indicates a fifth TCI state and cell switching; and receives feedback information (HARQ-ACK) for the fifth indication information, wherein after at least a sixth time interval elapses after a last symbol of the feedback information (HARQ-ACK) sent for the fifth indication information, the terminal device applies the indicated fifth TCI state in a post-switching cell;

[0470] The network device further sends sixth indication information, wherein the sixth indication information indicates a sixth TCI state;

[0471] receiving feedback information (HARQ-ACK) for the sixth indication information, wherein, after at least a seventh time interval has passed after the last symbol of the feedback information (HARQ-ACK) sent for the sixth indication information, the terminal device applies the indicated sixth TCI state in the serving cell;

[0472] The network device further sends seventh indication information, wherein the seventh indication information indicates cell switching;

[0473] In which, after at least an eighth time interval after the reference symbol, the terminal device applies the indicated sixth TCI state in the switched cell, wherein the reference symbol is the last symbol of the seventh indication information, or the last symbol of the feedback information (HARQ-ACK) for the seventh indication information.

Claims

1. An information receiving device, configured in a terminal device, comprising: a receiving unit configured to receive first indication information, wherein the first indication information indicates a first transmission configuration indication state (TCI state) and a cell handover, a sending unit, which sends feedback information (HARQ-ACK); The first transmission configuration indication state (TCI state) indicated by the switched cell application is applied after at least a first time interval has passed after the last symbol of the feedback information (HARQ-ACK).

2. The device according to claim 1, wherein The receiving unit further receives first configuration information, wherein the first configuration information configures one or more candidate target cells.

3. The device according to claim 2, wherein The first indication information indicates a candidate target cell as a primary target cell among the configured one or more candidate target cells.

4. The device according to claim 3, wherein Each of the one or more configured candidate target cells is associated with a first time interval, and the at least first time interval includes the first time interval associated with the primary target cell.

5. The device according to claim 3, wherein The indicated first transmission configuration indication state (TCI state) is associated with a cell, and the cell is the primary target cell, or a cell other than the primary target cell.

6. The device according to claim 3, wherein The cell after switching includes: the primary target cell; or, The main target cell and one or more candidate target cells other than the main target cell, wherein the main target cell and one or more candidate target cells other than the main target cell belong to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or belong to the same main cell group (MCG, Master Cell Group), and / or belong to the same secondary cell group (SCG, Secondary Cell Group).

7. The device according to claim 4, wherein The first time interval associated with the candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG, Master Cell Group), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group) is the same.

8. The device according to claim 4, wherein The first time interval associated with the candidate target cell is one or more symbols, where the one or more symbols are determined according to a first reference cell, where the first reference cell includes one of the following: the candidate target cell associated with the first time interval; The candidate target cell associated with the first time interval belongs to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or belongs to the same master cell group (MCG), and / or belongs to the same secondary cell group (SCG) (Secondary Cell Group) and has the smallest subcarrier spacing among the candidate target cells; the candidate target cell with the smallest subcarrier spacing among the one or more configured candidate target cells; The serving cell with the smallest subcarrier spacing among the serving cells.

9. The device according to claim 6, wherein Starting from the first time slot after at least the first time interval after the last symbol of the feedback information (HARQ-ACK), the first transmission configuration indication state (TCI state) indicated by the cell application after the handover is applied, The first time slot is determined according to a second reference cell, and the second reference cell includes one of the following: the primary target cell; The cell with the smallest subcarrier spacing among the switched cells.

10. The device according to claim 8, wherein The receiving unit further receives second configuration information, wherein the second configuration information configures a third time interval for each of the one or more configured candidate target cells; or The second configuration information configures a same third time interval for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or the same master cell group (MCG), and / or the same secondary cell group (SCG); or The second configuration information configures a third time interval for the configured one or more candidate target cells.

11. The device according to claim 10, wherein The first time interval associated with a candidate target cell is equal to the third time interval configured for the candidate target cell.

12. The device according to claim 10, wherein In a case where the second configuration information configures a third time interval for each of the one or more candidate target cells: The third time interval configured for candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG), and / or, belonging to the same secondary cell group (SCG), is the same.

13. The device according to any one of claims 10 to 12, wherein: The third time interval is one or more symbols, where the one or more symbols are determined according to the first reference cell.

14. The device according to claim 8, wherein The device further comprises: a reporting unit configured to report a second time interval for each of the one or more configured candidate target cells; or The candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList) and / or the same master cell group (MCG) and / or the same secondary cell group (SCG) report the same second time interval; or It reports a second time interval for the configured one or more candidate target cells.

15. The device according to claim 14, wherein The first time interval associated with a candidate target cell is equal to the second time interval reported for the candidate target cell.

16. The device according to claim 14, when reporting a second time interval for each of the one or more configured candidate target cells, the second time interval reported by the candidate target cells belonging to the same simultaneous TCI update list (simultaneousTCI-UpdateList), and / or, belonging to the same master cell group (MCG, Master Cell Group), and / or, belonging to the same secondary cell group (SCG, Secondary Cell Group) is the same.

17. The device according to any one of claims 14 to 16, wherein: The second time interval is one or more symbols, where the one or more symbols are determined according to the first reference cell.

18. The device according to claim 3, wherein The first transmission configuration indication state (TCI state) is applied to at least one of the following channels or signals of the primary target cell: Synchronization Signal and PBCH block (SSB); Physical Random Access Channel (PRACH); Type 1 physical downlink control channel common search space set (Type1-PDCCH CSS set); Control resource set (CORESET) associated with the Type 1 physical downlink control channel common search space set (Type1-PDCCH CSS set); Type 2 physical downlink control channel common search space set (Type2-PDCCH CSS set); A control resource set (CORESET) associated with a Type 2 physical downlink control channel common search space set (Type2-PDCCH CSS set); or Physical Uplink Shared Channel (PUSCH) scheduled by Random Access Response UL grant.

19. The device according to claim 1, wherein The receiving unit receives second indication information after receiving the first indication information, wherein the second indication information indicates a second transmission configuration indication state (TCI state); When a first set of cells to which the indicated first transmission configuration indication state (TCI state) is applied is a subset of a second set of cells to which the indicated second transmission configuration indication state (TCI state) is applied, the indicated second transmission configuration indication state (TCI state) is applied on the second set of cells, wherein the second transmission configuration indication state (TCI state) is the same as the first transmission configuration indication state (TCI state).

20. An information receiving device, configured in a terminal device, comprising: a second receiving unit configured to receive third indication information, wherein the third indication information indicates a fourth transmission configuration indication state (TCI state); a second sending unit, configured to send feedback information (HARQ-ACK) in response to the third indication information, wherein, after at least a fourth time interval has passed after a last symbol of the feedback information (HARQ-ACK) sent in response to the third indication information, the fourth transmission configuration indication state (TCI state) indicated is applied in the serving cell; The second receiving unit further receives fourth indication information, wherein the fourth indication information indicates cell switching; After at least a fifth time interval after the reference symbol, the fourth transmission configuration indication state (TCI state) indicated by the switching cell application is applied, wherein the reference symbol is the last symbol of the fourth indication information, or the last symbol of the feedback information (HARQ-ACK) sent by the second sending unit for the fourth indication information.

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