Data receiving device, data transmitting device and method

Abstract

An embodiment of the present invention provides a data receiving device, a data transmitting device, and a method, the method including the steps of: receiving first indication information, where the first indication information indicates at least one transmission configuration indication state (TCI state) set; receiving second indication information, where the second indication information indicates that a terminal device switches to at least one target cell; and receiving third indication information, where for the target cell, the third indication information indicates a transmission configuration indication state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from the first transmission configuration indication state (TCI state) set, the first transmission configuration indication state (TCI state) set being one of the transmission configuration indication state (TCI state) sets indicated by the first indication information, thereby enabling the terminal device to quickly apply an appropriate TCI state after cell switching and reducing switching interruption time.

Description

[Technical Field]

[0001] FIELD OF THE INVENTION Embodiments of the present invention relate to the field of communications technology. [Background technology]

[0002] The 3GPP (registered trademark) standardization organization is standardizing inter-cell beam management (ICBM) in the standardization of Release 17 (Rel-17). ICBM includes measurement, reporting, and beam indication. For example, regarding measurement, a terminal device can perform Layer 1-Reference Signal Receiving Power (L1-RSRP) measurement based on a synchronization signal and PBCH block (SSB) of a non-serving cell. For example, regarding reporting, the terminal device reports the L1-RSRP measurement result to a network device. For example, regarding beam indication, the network device can indicate a transmission configuration indication state (TCI state) related to the non-serving cell for the terminal device. In this way, the terminal device can use the beam of the non-serving cell, for example, to transmit information to or receive information from the non-serving cell using the beam. The terminal device can use the beam of the non-serving cell, but the serving cell of the terminal device does not change, i.e., the terminal device does not switch to the non-serving cell. Therefore, the terminal device is still within the bandwidth of the serving cell and applies the TCI state associated with the indicated non-serving cell to the serving cell based on the associated 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.

[0003] In Rel-17, the standardization work on the unified transmission configuration indication (TCI) was carried out, where the unified TCI in Rel-17 is mainly designed for single TRP or single TRP (single transmission and reception point: sTRP) scenarios.

[0004] With the progress of standardization work, multiple transmission and reception points (mTRP) have become an important scenario for 5G NR systems, and transmission based on mTRP can achieve improved throughput or reliability.

[0005] In previous standardization work, Rel-16 standardized Physical Downlink Shared Channel (PDSCH) transmission based on mTRP. Rel-17 standardized Physical Downlink Control Channel (PDCCH), Physical Uplink Shared Channel (PUSCH), and Physical Uplink Control Channel (PUCCH) transmission based on mTRP. Here, mTRP transmission includes mTRP transmission based on single Downlink Control Information (sDCI) and mTRP transmission based on multiple DCI (mDCI).

[0006] The above description of the background art is merely for the purpose of explaining the configuration of the present invention more clearly and completely, and is provided for the understanding of those skilled in the art. These configurations described in the background art of the present invention should not be construed as being well known to those skilled in the art. Summary of the Invention [Problem to be solved by the invention]

[0007] Rel-18 is researching Layer 1 / Layer 2 based mobility (LTM). The goal of Rel-18 LTM is to reduce the time required for handover interruption and to switch from a serving cell to a non-serving cell more quickly by using cell switching based on Layer 1 / Layer 2 signaling (triggered by Layer 1 / Layer 2). The target cell is the cell after switching and may be a serving cell or a non-serving cell. The handover interruption refers to the time from when a terminal device receives a cell switch command to when the terminal device first communicates with the target cell in uplink or downlink.

[0008] However, according to the discovery of the inventors of the present invention, how to indicate the TCI state for a target cell in Rel-18 LTM remains a problem to be solved.

[0009] In view of at least one of the above problems, embodiments of the present invention provide a data reception method, a data transmission method and an apparatus, which enable a terminal device to quickly apply an appropriate TCI state after cell switching and reduce the interruption time of the switching. [Means for solving the problem]

[0010] One aspect of an embodiment of the present invention provides a data reception method, applied to a terminal device, comprising: receiving first instruction information, the first instruction information indicating at least one transmission configuration indication state (TCI state) set; receiving second instruction information, the second instruction information indicating that the terminal device should switch to at least one target cell; and receiving third instruction information, for a target cell, the third instruction information indicating a transmission configuration indication state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from a first transmission configuration indication state (TCI state) set, the first transmission configuration indication state (TCI state) set being one of the transmission configuration indication state (TCI state) sets indicated by the first instruction information.

[0011] Another aspect of an embodiment of the present invention is a data reception method applied to a terminal device, the method including the steps of: receiving fourth instruction information, the fourth instruction information indicating at least one transmission configuration indication state (TCI state) set; receiving fifth instruction information, the fifth instruction information indicating at least one transmission configuration indication state (TCI state) subset, and for a transmission configuration indication state (TCI state) set, the fifth instruction information indicating a transmission configuration indication state (TCI state) subset in the transmission configuration indication state (TCI state) set; receiving sixth instruction information, the sixth instruction information instructing the terminal device to switch to at least one target cell, the target cell being one of candidate cells configured for the terminal device; and receiving seventh instruction information, for a target cell, the seventh instruction information indicating a selection of the target cell from a second transmission configuration indication state (TCI state) set. and indicating a transmission configuration indication state (TCI state) to be applied to a third bandwidth portion (BWP) of the cell, the second transmission configuration indication state (TCI state) being one of a subset of transmission configuration indication states (TCI state) indicated by the fifth indication information.

[0012] Another aspect of an embodiment of the present invention provides a data transmission method, applied to a network device, comprising: a step of transmitting first instruction information, wherein the first instruction information indicates at least one transmission configuration indication state (TCI state) set; a step of transmitting second instruction information, wherein the second instruction information indicates that a terminal device switches to at least one target cell; and a step of transmitting third instruction information, wherein, for a target cell, the third instruction information indicates a transmission configuration indication state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from a first transmission configuration indication state (TCI state) set, and the first transmission configuration indication state (TCI state) set is one of the transmission configuration indication state (TCI state) sets indicated by the first instruction information.

[0013] In another aspect of an embodiment of the present invention, a data transmission method is applied to a network device, the method including the steps of: transmitting fourth instruction information, wherein the fourth instruction information indicates at least one transmission configuration indication state (TCI state) set; transmitting fifth instruction information, wherein the fifth instruction information indicates at least one transmission configuration indication state (TCI state) subset, and for a transmission configuration indication state (TCI state) set, the fifth instruction information indicates a transmission configuration indication state (TCI state) subset in the transmission configuration indication state (TCI state) set; transmitting sixth instruction information, wherein the sixth instruction information instructs a terminal device to switch to at least one target cell, the target cell being one of candidate cells configured for the terminal device; and transmitting seventh instruction information, wherein for a target cell, the seventh instruction information selects a cell from a second transmission configuration indication state (TCI state) set to select the target cell. and indicating a transmission configuration indication state (TCI state) to be applied to a third bandwidth portion (BWP) of the cell, the second transmission configuration indication state (TCI state) being one of a subset of transmission configuration indication states (TCI state) indicated by the fifth indication information.

[0014] Another aspect of an embodiment of the present invention provides a data receiving device configured in a terminal device, the device including: a first receiving unit that receives first instruction information, where the first instruction information indicates at least one transmission configuration instruction state (TCI state) set; a second receiving unit that receives second instruction information, where the second instruction information indicates that the terminal device should switch to at least one target cell; and a third receiving unit that receives third instruction information, where for a target cell, the third instruction information indicates a transmission configuration instruction state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from a first transmission configuration instruction state (TCI state) set, and the first transmission configuration instruction state (TCI state) set is one of the transmission configuration instruction state (TCI state) sets indicated by the first instruction information.

[0015] In another aspect of the embodiment of the present invention, a data receiving device configured in a terminal device includes: a fourth receiving unit configured to receive fourth instruction information, wherein the fourth instruction information indicates at least one transmission configuration instruction state (TCI state) set; a fifth receiving unit configured to receive fifth instruction information, wherein the fifth instruction information indicates at least one transmission configuration instruction state (TCI state) subset, and for a transmission configuration instruction state (TCI state) set, the fifth instruction information indicates a transmission configuration instruction state (TCI state) subset in the transmission configuration instruction state (TCI state) set; and a sixth receiving unit configured to receive sixth instruction information, wherein the sixth instruction information indicates that the terminal device switches to at least one target cell, and the target cell is a candidate cell configured for the terminal device. a sixth receiver for receiving seventh instruction information, the seventh instruction information indicating, for a target cell, a transmission configuration instruction state (TCI state) to be applied to a third bandwidth portion (BWP) of the target cell from a second transmission configuration instruction state (TCI state) set, the second transmission configuration instruction state (TCI state) set being one of a subset of transmission configuration instruction states (TCI state) indicated by the fifth instruction information.

[0016] Another aspect of an embodiment of the present invention provides a data transmission device configured in a network device, the device including: a first transmitter unit that transmits first instruction information, where the first instruction information indicates at least one transmission configuration indication state (TCI state) set; a second transmitter unit that transmits second instruction information, where the second instruction information indicates that a terminal device switches to at least one target cell; and a third transmitter unit that transmits third instruction information, where for a target cell, the third instruction information indicates a transmission configuration indication state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from a first transmission configuration indication state (TCI state) set, and the first transmission configuration indication state (TCI state) set is one of the transmission configuration indication state (TCI state) sets indicated by the first instruction information.

[0017] In another aspect of the embodiment of the present invention, a data transmission device is configured in a network device, the data transmission device including: a fourth transmitter configured to transmit fourth instruction information, the fourth instruction information indicating at least one transmission configuration instruction state (TCI state) set; a fifth transmitter configured to transmit fifth instruction information, the fifth instruction information indicating at least one transmission configuration instruction state (TCI state) subset, and for a transmission configuration instruction state (TCI state) set, the fifth instruction information indicating a transmission configuration instruction state (TCI state) subset in the transmission configuration instruction state (TCI state) set; and a sixth transmitter configured to transmit sixth instruction information, the sixth instruction information indicating that a terminal device switches to at least one target cell, the target cell being a candidate cell configured for the terminal device. a sixth transmitter, the fifth transmitter being one of a sixth set of TCI states for a target cell; and a seventh transmitter configured to transmit seventh instruction information, where for a target cell, the seventh instruction information indicates a TCI state to be applied to a third Bandwidth Part (BWP) of the target cell from a second TCI state set, the second TCI state set being one of a TCI state subset indicated by the fifth instruction information.

[0018] An advantageous effect of an embodiment of the present invention is as follows: the method includes the steps of: receiving first indication information by a terminal device, where the first indication information indicates at least one transmission configuration indication state (TCI state) set; receiving second indication information by the terminal device, where the second indication information indicates that the terminal device should switch to at least one target cell; and receiving third indication information by the terminal device, where for the target cell, the third indication information indicates a transmission configuration indication state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from the first transmission configuration indication state (TCI state) set, where the first transmission configuration indication state (TCI state) set is one of the transmission configuration indication state (TCI state) sets indicated by the first indication information. This allows the terminal device to quickly apply an appropriate TCI state after cell switching and reduce switching interruption time.

[0019] As shown in the following description and drawings, specific embodiments of the present invention are disclosed in detail to illustrate ways in which the principles of the present invention can be employed. However, the scope of the present invention is not limited to these embodiments. The present invention encompasses all modifications, alterations, and equivalents within the spirit and scope of the appended claims.

[0020] Features described and / or shown in one embodiment may be used in the same or similar manner in one or more other embodiments, may be combined with features in other embodiments, or may be substituted for features in other embodiments.

[0021] It should be noted that in this text, the term "comprise / have" means the presence of a feature, element, step or component, and does not exclude the presence or addition of one or more other features, elements, steps or components. [Brief explanation of the drawings]

[0022] Elements and features depicted in one drawing and one embodiment of an example of the invention may be combined with elements and features shown in one or more drawings or embodiments, and in the drawings, like reference numerals may indicate corresponding elements in multiple drawings and may indicate corresponding elements used in more than one embodiment. [Figure 1] 1 is a schematic diagram of a communication system according to an embodiment of the present invention; [Figure 2] FIG. 1 is a schematic diagram of cell switching in LTM according to an embodiment of the present invention. [Figure 3] FIG. 2 is a schematic diagram of beam pointing for an LTM according to an embodiment of the present invention. [Figure 4] 1 is a schematic diagram of an example of a data receiving method according to an embodiment of the present invention; [Figure 5] FIG. 10 is a schematic diagram of an example of a flow of an instruction of a target cell TCI state according to an embodiment of the present invention. [Figure 6] 10 is a schematic diagram of an example of a TCI state indication according to an embodiment of the present invention; [Figure 7] FIG. 10 is a schematic diagram of another example of an indication of a TCI state according to an embodiment of the present invention. [Figure 8] FIG. 10 is a schematic diagram of another example of an indication of a TCI state according to an embodiment of the present invention. [Figure 9] FIG. 10 is a schematic diagram of an example of target cell indication according to an embodiment of the present invention; [Figure 10] FIG. 10 is a schematic diagram of another example of a data receiving method according to an embodiment of the present invention. [Figure 11] FIG. 10 is a schematic diagram of another example of a data transmission method according to an embodiment of the present invention. [Figure 12] FIG. 10 is a schematic diagram of another example of a data transmission method according to an embodiment of the present invention. [Figure 13] 1 is a schematic diagram of an example of a data receiving device according to an embodiment of the present invention; [Figure 14] FIG. 10 is a schematic diagram of another example of a data receiving device according to an embodiment of the present invention. [Figure 15] 1 is a schematic diagram of an example of a data transmission device according to an embodiment of the present invention; [Figure 16] FIG. 10 is a schematic diagram of another example of a data transmission device according to an embodiment of the present invention. [Figure 17] 1 is a schematic diagram of a configuration of a network device according to an embodiment of the present invention; [Figure 18] FIG. 1 is a schematic diagram of a terminal device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0023] The above and other features of the present invention will become apparent from the following description. In the specification and drawings, specific embodiments of the present invention are disclosed in detail, and some of the embodiments in which the principles of the present invention can be adopted are shown. However, the present invention is not limited to the described embodiments. The present invention includes all modifications, variations, and equivalents within the scope of the appended claims. Below, various embodiments of the present invention will be described with reference to the drawings. These embodiments are merely illustrative and do not limit the present invention.

[0024] In embodiments of the present invention, the terms "first," "second," etc. are used in titles to distinguish between different elements, but do not represent the spatial arrangement or temporal order of these elements, and these elements are not limited to these terms. The term "and / or" includes any and all combinations of one or more of the terms listed in the associated list. The terms "comprise," "include," "have," etc. refer to the presence of listed features, elements, elements, or components, but do not exclude the presence or addition of one or more other features, elements, elements, or components.

[0025] In the embodiments of the present invention, the singular forms "one," "the," etc., include the plural and should be understood broadly as "one kind" or "one class," and are not limited to "one." Furthermore, the term "said" should be understood to include both the singular and the plural, unless the context clearly indicates otherwise. Furthermore, the term "described in" should be understood to mean "described at least in part," and the term "based on" should be understood to mean "based at least in part," unless the context clearly indicates otherwise.

[0026] In embodiments of the present invention, the terms "communication network" or "wireless communication network" may refer to a network conforming to any communication standard, such as, for example, Long Term Evolution (LTE), Long Term Evolution Advanced (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0027] Additionally, communications between devices in a communications system may occur according to any stage of communications protocol, including, but not limited to, 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and 5G, New Radio (NR), and / or other currently known or future developed communications protocols.

[0028] In an embodiment of the present invention, the term "network device" refers to a device in a communication system that allows a terminal device to access the communication system and provides a service to the terminal device, and may include, but is not limited to, a base station (BS), an access point (AP), a transmission reception point (TRP), a broadcast transmitter, a mobility management entity (MME), a gateway, a server, a radio network controller (RNC), a base station controller (BSC), etc.

[0029] Here, the base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), a 5G base station (gNB), etc., as well as a remote radio head (RRH), a remote radio unit (RRU), a relay, or a low-power node (e.g., femto, pico, etc.). Also, the term "base station" may include some or all of these functions, and each base station may provide communication coverage for a particular geographic area. The term "cell" may refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0030] In the embodiments of the present invention, the term "User Equipment" (UE) or "Terminal Equipment" (TE) refers to a device that accesses a communication network and receives network services via, for example, a network device. The terminal device may be fixed or mobile, and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, etc.

[0031] Here, the terminal device may include, but is not limited to, a cellular phone, a personal digital assistant (PDA), a wireless modulation / demodulation device, a wireless communication device, a handheld device, a machine-type communication device, a laptop computer, a cordless phone, a smartphone, a smart watch, a digital camera, etc.

[0032] Furthermore, for example, in a scenario such as the Internet of Things (IoT), the user device may be a monitoring or measurement device or apparatus, including, but not limited to, a Machine Type Communication (MTC) terminal, an in-vehicle communication terminal, an industrial wireless device, a surveillance camera, a Device to Device (D2D) terminal, a Machine to Machine (M2M) terminal, etc.

[0033] Furthermore, the term "network side" or "network device side" refers to the side of a network, which may be a base station or may include one or more of the network devices described above. The term "user side" or "terminal side" or "terminal device side" refers to the side of a user or terminal, which may be a UE or may include one or more of the terminal devices described above. In this specification, unless otherwise specified, "device" may refer to either a network device or a terminal device.

[0034] The following describes an example scenario of the present invention with reference to an example, but the present invention is not limited thereto.

[0035] 1 is a schematic diagram of a communication system according to an embodiment of the present invention, and schematically illustrates an example of a terminal device and a network device. As shown in FIG. 1, the communication system 100 may include a first TRP 101, a second TRP 102, and a terminal device 103. Here, the first TRP 101 and the second TRP 102 may be network devices. For convenience of explanation, FIG. 1 illustrates only two network devices and one terminal device as an example, but the embodiment of the present invention is not limited thereto.

[0036] In the embodiment of the present invention, existing services or services that can be implemented in the future can be performed between the first TRP 101, the second TRP 102, and the terminal device 103. For example, these services include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC).

[0037] Rel-17 standardizes a unified transmission configuration indication (TCI). Rel-17 ICBM is based on the Rel-17 unified TCI. The Rel-17 unified TCI is for a single transmission and reception point (sTRP) scenario. Here, 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 may schedule downlink data and be called DCI format 1_1 / 1_2 with DL assignment, or may not schedule downlink data and be called DCI format 1_1 / 1_2 without DL assignment. Indicating or updating the TCI state actually also includes indicating or updating the beam used by the terminal device. The TCI state includes a joint TCI state, a downlink TCI state, and an uplink TCI state. The joint TCI state affects 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 have opposite beam directions, i.e., the uplink beam and the downlink beam are compatible. The downlink TCI state only affects the downlink beam. The uplink TCI state only affects the uplink beam. The uplink beam is also called the uplink transmit spatial filter. For the unified TCI in Rel-17, one TCI field indicates one joint TCI state, one downlink TCI state, one uplink TCI state, or both one downlink TCI state and one uplink TCI state. Assuming that the DCI indicates a 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 channels or signals dedicated to the terminal device and some common channels or signals. Rel-17 defines simultaneous TCI update lists. Of N carrier-aggregated cells, 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. When the TCI state applied to a cell is updated and the cell belongs to one simultaneous TCI update list, the TCI states applied to other cells in the simultaneous TCI update list are also updated. In other words, the TCI states belonging to cells in one simultaneous TCI update list are updated simultaneously.

[0038] Rel-18 considers Layer 1 / Layer 2 Triggered Mobility (LTM).

[0039] FIG. 2 is a schematic diagram of cell switching in LTM according to an embodiment of the present invention. As shown in FIG. 2, cells C0, C1, and C2 belong to serving cells. For example, cells C0, C1, and C2 are a group of cells in carrier aggregation, where cell C0 is a primary cell (Pcell), and cells C1 and C2 are secondary cells (Scell). For example, the serving cell is at least one of a special cell (SpCell), an Scell, an activated cell, and a deactivated cell. Cells C3, C4, C5, and C6 belong to non-serving cells. For example, cells C3, C4, C5, and C6 are a group of cells in carrier aggregation, where cell C3 is a Pcell, and cells C4, C5, and C6 are Scells. Rel-18 LTM supports switching from one cell (e.g., cell C0) to a serving cell, an intra-frequency cell, and an inter-frequency cell. For example, cell C0 can be switched to cell C2 (serving cell), cell C3 (intra-frequency), and cell C6 (inter-frequency cell). For example, a cell to which a terminal device can switch is called a candidate cell, and a cell to which the terminal device can actually switch is called a target cell. The terminal device is provided with a candidate cell configuration, receives a cell switch command and a TCI state indication, switches to the target cell, and applies the indicated TCI state to the target cell.The terminal device can switch to one or more target cells, for example, from a set of serving cells of the carrier aggregation (cell C0, cell C1, cell C2) to a set of non-serving cells of the carrier aggregation (cell C3, cell C4, cell C5, cell C6).

[0040] However, the inventors of the present invention discovered the following.

[0041] Rel-18 is researching Layer 1 / Layer 2 based mobility (LTM). The goal of Rel-18 LTM is to reduce the time required for handover interruption and to switch from a serving cell to a non-serving cell more quickly by using cell switching based on Layer 1 / Layer 2 signaling (triggered by Layer 1 / Layer 2). The target cell is the cell after switching and may be a serving cell or a non-serving cell. The handover interruption refers to the time from when a terminal device receives a cell switch command to when the terminal device first communicates with the target cell in uplink or downlink.

[0042] For example, Fig. 3 is a schematic diagram of beam indication in LTM according to an embodiment of the present invention. As shown in Fig. 3, the terminal device simultaneously receives a cell switch indication (cell switch command) and a TCI state indication, and preferably transmits an ACK to the network device. At a certain point thereafter, for example, starting from Y symbols after the ACK is transmitted, the terminal device directly applies the indicated TCI state to the target cell. That is, the terminal device is directly switched from the serving cell to the target cell, and the indicated TCI state is applied.

[0043] Compared with cell switching based on traditional Layer 3 signaling, cell switching based on Layer 1 / Layer 2 signaling can further reduce switching latency. To realize cell switching based on Layer 1 / Layer 2, the terminal device needs to measure and report candidate cells (cells to which the terminal may switch), and the network device needs to instruct the terminal device on the beam (TCI state) to be used in the target cell after switching. Rel-18 LTM can instruct the TCI state based on the Rel-17 unified TCI framework. In the case of Rel-17 ICBM, the terminal device does not need to switch to a cell. In Rel-18 LTM, the terminal device needs to perform a cell switch to switch to the target cell. Due to this significant difference, the measurement, reporting, and beam instruction in Rel-18 LTM require different designs. Therefore, how to indicate the TCI state for a target cell in Rel-18 LTM remains an issue to be resolved.

[0044] In view of at least one of the above problems, embodiments of the present invention provide a data receiving method, a data transmitting method and an apparatus.

[0045] Example 1 An embodiment of the present invention provides a data receiving method, which is applied to a terminal device side.

[0046] 4 is a schematic diagram of an example of a data receiving method according to an embodiment of the present invention. As shown in FIG. 4, the method includes the following steps:

[0047] Step 401: A terminal device receives first indication information, which indicates at least one transmission configuration indication state (TCI state) set.

[0048] Step 402: The terminal device receives second instruction information, which instructs the terminal device to switch to at least one target cell.

[0049] Step 403: The terminal device receives third indication information, which indicates, for the target cell, a transmission configuration indication state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from a first transmission configuration indication state (TCI state) set, and the first transmission configuration indication state (TCI state) set is one of the transmission configuration indication state (TCI state) sets indicated by the first indication information.

[0050] This allows the terminal device to quickly apply an appropriate TCI state after cell switching based on the first instruction information, the second instruction information, and the third instruction information, thereby shortening the switching interruption time.

[0051] It should be noted that the above-mentioned FIG. 4 merely illustrates an example of the present invention, and the present invention is not limited thereto. For example, the execution order of various steps may be appropriately adjusted, some other steps may be added, or some steps may be removed. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the description of the above-mentioned FIG. 4.

[0052] In some embodiments of the present invention, "instruction" may be replaced with "configuration", for example, "RRC signal indication" may be replaced with "RRC signaling configuration". "Instruction" may be replaced with "activation / deactivation", for example, "MAC CE indication" may be replaced with "MAC CE activation / deactivation". "TCI state set" may be referred to as "TCI state pool" or "TCI state list". For convenience of explanation, the present invention is not limited to the above expressions.

[0053] In some embodiments, the term "DL TCI state" can be "DL only TCI state" or "joint TCI state." The term "UL TCI state" can be "UL only TCI state" or "joint TCI state." The above is an exemplary description, and embodiments of the present invention are not limited thereto.

[0054] In some embodiments, the TCI state set is a downlink or joint TCI state set, the TCI state is a downlink or joint TCI state, and the BWP is a downlink BWP, or the TCI state set is an uplink TCI state set, the TCI state is an uplink TCI state, and the BWP is an uplink BWP.

[0055] For example, the relevant notation in this application states that "TCI state set," "TCI state," and "BWP" apply to both downlink and uplink. A terminal device may apply the data reception method of this application to one transmission direction (uplink or downlink) or to both transmission directions (uplink and downlink).

[0056] For example, the TCI state set is a downlink or joint TCI state set, the TCI state is a downlink or joint TCI state, and the BWP is a downlink BWP.

[0057] For example, a terminal device is configured with one or more downlink or joint TCI state sets. Therefore, the TCI state of a TCI state set is a downlink or joint TCI state, and the BWP that applies the TCI state is a downlink BWP. In other words, the aforementioned TCI state set is replaced with a downlink or joint TCI state set, the aforementioned TCI state is replaced with a downlink or joint TCI state, and the aforementioned BWP is replaced with a downlink BWP. The first TCI state set can also be referred to as a first TCI state set applied to the downlink. The first BWP can also be referred to as a first BWP applied to the downlink.

[0058] For example, the TCI state set is an uplink TCI state set, the TCI state is an uplink TCI state, and the BWP is an uplink BWP.

[0059] For example, a terminal device is configured with one or more uplink TCI state sets. Therefore, the TCI state of a TCI state set is an uplink TCI state, and the BWP that applies the TCI state is an uplink BWP. In other words, the aforementioned TCI state set is replaced by an uplink TCI state set, the aforementioned TCI state is replaced by an uplink TCI state, and the aforementioned BWP is replaced by an uplink BWP. The first TCI state set can also be referred to as a first TCI state set applied to the uplink. The first BWP can also be referred to as a first BWP applied to the uplink.

[0060] In some embodiments, the TCI state is indicated by a TCI state identifier or a TCI state index.

[0061] For example, the above-mentioned TCI state is indicated by a TCI state ID, where the TCI state ID is a number for X TCI states, where X is the maximum number of TCI states.

[0062] For example, a TCI state is indicated by a TCI state ID, which can be regarded as a kind of global number, and assuming that X is the maximum number of TCI states that can be supported in one BWP of one cell (or one cell), the TCI state IDs may be numbered from 0 to X-1, or from 1 to X. For example, the value of X may be 128 or 64, and is not limited thereto in this specification.

[0063] In some embodiments, the TCI state is indicated by a TCI state index, which is an index for Y TCI states, where Y is the number of TCI states in the TCI state set. For example, the TCI state is indicated by a TCI state index, which can be considered as a kind of local number, and the first indication information indicates one BWP of one cell, where Y is assumed to be the number of TCI states included in the TCI state set, and the TCI state index may be numbered from 0 to Y-1 or 1 to Y. For example, the value of Y may be 8, and the present specification is not limited thereto.

[0064] In some embodiments, the target cell is one of at least one candidate cell configured for the terminal device, the at least one candidate cell including a serving cell and / or a non-serving cell.

[0065] For example, as shown in FIG. 2, the at least one candidate cell may be configured to include {cell C1, cell C2, cell C3, cell C4, cell C5, cell C6}, and the target cell is one or more of {cell C1, cell C2, cell C3, cell C4, cell C5, cell C6}. The following is a brief example of a method flow for indicating the TCI state of a target cell.

[0066] FIG. 5 is a schematic diagram of an example of a flow of an instruction of a target cell TCI state according to an embodiment of the present invention. As shown in FIG. 5, for example, first instruction information indicates at least one TCI state set, second instruction information indicates cell switching and information necessary for cell switching, and third instruction information indicates beam information, for example, a TCI state to be used in a cell after switching from one TCI state set. The above description applies to a single transmission direction (downlink or uplink). As shown in FIG. 5, for example, a terminal device indicates (or configures) one or more TCI state sets using the first instruction information. One TCI state set is associated with one bandwidth part (BWP) of one cell. In other words, a TCI state set is configured for each BWP (per BWP) per cell. Alternatively, one TCI state set is associated with a user equipment (UE). In other words, a TCI state set is configured for each UE (per UE) and is UE-specific. For example, the terminal device is instructed by the second instruction information to switch to one or more target cells. The terminal device configures one or more candidate cells, where a candidate cell is a cell to which the terminal device may be switched, and a target cell is one of the candidate cells to which the terminal device may be switched, i.e., a cell to which the terminal device is switched. For example, the third instruction information indicates one TCI state for each target cell. For one target cell, the third instruction information indicates one TCI state from one TCI state set (first TCI state set) associated with the target cell.The first TCI state sets associated with different target cells may be the same or different. For one target cell, the target cell indicated by the third indication information is applied to one BWP (first BWP) of the target cell (TCI state). In other words, after switching to the target cell, the terminal device uses the TCI state indicated by the third indication information on the first BWP of the target cell.

[0067] The following describes how the TCI state set, the first TCI state set, the target cell, the first BWP, etc. are indicated.

[0068] The following describes how the TCI state set is indicated.

[0069] In some embodiments, the first indication information indicating at least one TCI state set includes at least one of the following: The first indication information indicates a TCI state set for the terminal device; For a serving cell, the first indication information indicates a TCI state set for a BWP of the serving cell; Or, For a candidate cell, the first indication information indicates a TCI state set for a BWP of the candidate cell.

[0070] In some embodiments, when the first indication information indicates a TCI state set for the terminal device, or when the first indication information indicates a TCI state set for one BWP of a serving cell, the TCI state set includes at least one first TCI state and at least one second TCI state, or the TCI state set includes at least one second TCI state, where the first TCI state is applied to one BWP of the serving cell and the second TCI state is applied to a BWP of a candidate cell.

[0071] In some embodiments, the TCI state set is indicated in the serving cell configuration information.

[0072] FIG. 6 is a schematic diagram of an example of a TCI state indication according to an embodiment of the present invention. As shown in FIG. 6, for one serving cell, first indication information indicates a TCI state set for one BWP of the serving cell. The first indication information indicates at least one TCI state set for at least one serving cell. For example, at least one serving cell is represented by at least one first cell, and at least one non-serving cell is represented by at least one second cell, third cell, etc. Although FIG. 6 only shows the case of one BWP per cell, it can be easily extended to the case of supporting multiple BWPs per cell. For example, the method of FIG. 6 can be applied to each BWP per cell, but this is not described in this application. As shown in FIG. 6, without causing any confusion, when a cell is mentioned, the BWP of that cell is also referenced.

[0073] For example, when a terminal device switches from a serving cell (e.g., first cell 1) to a target cell (e.g., taking first cell 1 as an example, it may be another serving cell), its BWP is configured with a TCI state set. The TCI state set may include a second TCI state to be applied to the BWP of a candidate cell, for example, first cell 2, second cell 1, second cell 2, ..., third cell 1, third cell 2, ..., including associated TCI states such as TCI state 1_2_1, TCI state 1_2_2, TCI state 2_1_1, TCI state 2_1_2, TCI state 3_1_1, and TCI state 3_1_2 shown in FIG. 6. Note that TCI state 1_2_1, TCI state 1_2_2, TCI state 2_1_1, TCI state 2_1_2, TCI state 3_1_1, TCI state 3_1_2, etc. shown in Figure 6 are intended to distinguish the TCI states of different cells, and the specific values ​​of TCI state 1_2_1, TCI state 1_2_2, TCI state 2_1_1, TCI state 2_1_2, TCI state 3_1_1, TCI state 3_1_2 may be the same or different, and the specific values ​​of TCI state 1_2_1, TCI state 1_2_2, TCI state 2_1_1, TCI state 2_1_2, TCI state 3_1_1, TCI state 3_1_2 may refer to the related content in TCI state X or TCI state Y above, and the description thereof will be omitted here.Preferably, the TCI state set may further include a first TCI state applied to the BWP of first cell 1, for example, one or more TCI states associated with first cell 1, such as TCI state 1_1_1 and TCI state 1_1_2 shown in FIG. 6. Candidate cells may include non-serving cells (e.g., second cell 1, second cell 2, ..., third cell 1, third cell 2, ...) and serving cells (e.g., first cell 2, ...). The TCI state set may include TCI states associated with multiple candidate cells. The number of TCI states associated with a cell in a TCI state set may be one or more. Here, we will use an example in which one serving cell (first cell 1) is configured with one TCI state set, but if multiple serving cells are configured with multiple TCI state sets, for example, if each serving cell of multiple serving cells is configured with one TCI state set and these TCI state sets are at least one TCI state set indicated by the first instruction information, the TCI state sets can be easily expanded.

[0074] As another example, the first indication information indicates a TCI state set for the terminal device. In other words, the TCI state set is configured in a UE-specific manner, i.e., each terminal device is associated with a TCI state set rather than being configured per BWP per cell, i.e., not being associated with a TCI state set per BWP per cell. The TCI state set includes TCI states applied to BWPs of candidate cells.

[0075] In some embodiments, the TCI state set is indicated in the serving cell configuration information ("serving cell configuration").

[0076] For example, the TCI state set is configured in "serving cell configuration." As shown in Figure 6, the BWP of a serving cell is configured with a TCI state set, and the TCI state set is configured with serving cell configuration information (e.g., configured in a "ServingCellConfig" information element (IE) that provides serving cell configuration information). For example, the TCI state set is a downlink or joint TCI state set, and the TCI state set is configured in "PDSCH-Config" under "ServingCellConfig." For example, the TCI state set is an uplink TCI state TCI state set, and the TCI state set is configured in "BWP-UplinkDedicated" under "ServingCellConfig."

[0077] As another example, the first indication information indicates one UE-specific TCI state set for the terminal device, and this TCI state set is configured in a "CellGroupConfig" IE that provides serving cell configuration information.

[0078] For example, the specific contents and / or formats of the above-mentioned information elements (IEs), such as "ServingCellConfig", "PDSCH-Config", "BWP-UplinkDedicated", etc., may refer to the prior art and are not limited to the present application.

[0079] In some embodiments, when the first indication information indicates a TCI state set for one BWP of a candidate cell, the TCI state set includes at least one third TCI state, where the third TCI state is applied to the one BWP of the candidate cell.

[0080] In some embodiments, the TCI state set is indicated in the candidate cell configuration information.

[0081] For example, for a candidate cell, the first indication indicates one TCI state set for one BWP of the candidate cell, and the TCI state set includes at least one third TCI state, which is applied to the BWP of the candidate cell.

[0082] 7 is a schematic diagram of another example of a TCI state indication according to an embodiment of the present invention. For example, as shown in FIG. 7, the first indication information indicates at least one TCI state set for at least one candidate cell. For example, the terminal device needs to switch from a serving cell (e.g., first cell 1) to one or more of the candidate cells. The candidate cells may include non-serving cells (e.g., second cell 1, second cell 2, ..., third cell 1, third cell 2, ...) and may also include a serving cell (e.g., first cell 2, ...). The BWP of each candidate cell is configured with a TCI state set, which includes one or more third TCI states applied to the BWP of the candidate cell, such as TCI state 1_2_1, TCI state 1_2_2, TCI state 2_1_1, TCI state 2_1_2, TCI state 3_1_1, and TCI state 3_1_2 shown in FIG. 7.

[0083] In some embodiments, the TCI state set is indicated in the "candidate cell configuration."

[0084] For example, a TCI state set is configured in "candidate cell configuration." As shown in Figure 7, a TCI state set is configured in the BWP of each candidate cell, and the TCI state set is configured with the configuration information of the candidate cell (for example, configured in a "CellGroupConfig" IE that provides candidate cell configuration information). For example, the TCI state set is a downlink or joint TCI state TCI state set, which is configured in "PDSCH-Config" under "ServingCellConfig" in "CellGroupConfig." For example, the TCI state set is an uplink TCI state TCI state set, which is configured in "BWP-UplinkDedicated" under "ServingCellConfig" in "CellGroupConfig."

[0085] For example, the specific contents and / or formats of the above information elements (IEs), such as "CellGroupConfig", "ServingCellConfig", "PDSCH-Config", "BWP-UplinkDedicated", etc., may refer to the prior art, and this specification is not limited thereto.

[0086] In some embodiments, the first indication indicates a downlink or joint TCI state set for a downlink BWP of a first serving cell or a first candidate cell, and / or an uplink TCI state set for an uplink BWP of a second serving cell or a second candidate cell. For example, the first serving cell may be the same as or different from the second serving cell. The first candidate cell may be the same as or different from the second candidate cell.

[0087] For example, consider an example in which a first serving cell and a second serving cell are the same. As shown in Figure 6, a BWP of a serving cell is configured with a TCI state set, one downlink BWP of a serving cell is configured with a downlink or joint TCI state set, and / or one uplink BWP of a serving cell is configured with an uplink TCI state set.

[0088] For example, a case where the first candidate cell and the second candidate cell are the same will be described. As shown in Figure 7, the BWP of the candidate cell is configured with a TCI state set, one downlink BWP of the candidate cell is configured with a downlink or joint TCI state set, and / or one uplink BWP of the candidate cell is configured with an uplink TCI state set.

[0089] In some embodiments, the first indication information indicates a downlink or joint TCI state set for the terminal device and / or indicates an uplink TCI state set for the terminal device.

[0090] For example, the first indication information configures a TCI state set in a UE specific manner, configures a downlink or joint TCI state set for the UE to indicate a downlink or joint TCI state for the target cell, and / or configures an uplink TCI state set for the UE to indicate an uplink TCI state for the target cell.

[0091] In some embodiments, the "unifiedTCI-StateType" configured for a serving cell or a candidate cell is "joint" or "separate."

[0092] For example, in the case of a cell (serving cell or candidate cell), 'unifiedTCI-StateType' is the unified TCI state type configured for the cell. As shown in FIG. 7, in the case of a candidate cell, 'unifiedTCI-StateType' being 'joint' means that the candidate cell is configured with a 'downlink or joint TCI state set', and 'unifiedTCI-StateType' being 'separate' means that the candidate cell is configured with a 'downlink or joint TCI state set' and an 'uplink TCI state set'. As shown in FIG. 6, in the case of a serving cell, regardless of whether 'unifiedTCI-StateType' configured for the serving cell is 'joint' or 'separate', the serving cell may be configured with a 'downlink or joint TCI state set' and an 'uplink TCI state set'. This is because here the TCI state set is used to indicate the TCI State of the candidate cell, and whether an uplink TCI state set is required depends on the "unifiedTCI-StateType" of the candidate cell, not the "unifiedTCI-StateType" of the serving cell.

[0093] In some embodiments, when the first indication indicates a TCI state set for one BWP of a serving cell, if the configured unified TCI state type of at least one candidate cell is separate, the first indication indicates a downlink or joint TCI state set for one downlink BWP of a first serving cell and an uplink TCI state set for one uplink BWP of a second serving cell, where the first serving cell is the same as or different from the second serving cell.

[0094] In some embodiments, when the first indication information indicates one TCI state set for the terminal device, if the unified TCI state type (unifiedTCI-StateType) configured for at least one candidate cell is separate, the first indication information indicates a downlink or joint TCI state set for the terminal device and an uplink TCI state set for the terminal device.

[0095] For example, an example will be described in which the first serving cell and the second serving cell are the same. As described above, regardless of whether the 'unifiedTCI-StateType' configured for the serving cell is 'joint' or 'separate', the serving cell may be configured with a 'downlink or joint TCI state set' and an 'uplink TCI state set'. Furthermore, if the 'unifiedTCI-StateType' configured for at least one candidate cell is 'separate', the serving cell needs to be configured with a 'downlink or joint TCI state set' and an 'uplink TCI state set'. This is because, as long as the 'unifiedTCI-StateType' of one candidate cell is 'separate', an uplink TCI state set that can be used to indicate the uplink TCI state for the candidate cell needs to be configured for the serving cell. Here, the "downlink or joint TCI state set" and / or the "uplink TCI state set" includes a TCI state applied to a candidate cell. Although it is assumed above that the first indication information indicates one TCI state set for the BWP of a serving cell, the above method can also be applied to a case where the first indication information indicates one TCI state set for a terminal device, and this will not be described again herein.

[0096] In some embodiments, if the configured "unifiedTCI-StateType" of all candidate cells is "joint", the first indication information indicates one "downlink or joint TCI state set" for one downlink BWP of the first serving cell, or one "downlink or joint TCI state set" for the terminal device.

[0097] For example, if the "unifiedTCI-StateType" configured for all candidate cells is "joint", the same TCI state is used in the uplink and downlink, and therefore only one "downlink or joint TCI state set" may be configured, where the "downlink or joint TCI state set" includes the TCI state applied to the candidate cells.

[0098] The following describes how the first TCI state set is determined.

[0099] In some embodiments, when the first indication information indicates a TCI state set for the terminal device, the first TCI state set is the indicated TCI state set.

[0100] For example, if the first indication information configures a unique TCI state set for a certain transmission direction in a UE specific manner, the first TCI state set is the TCI state set.

[0101] In some embodiments, when the first indication information indicates a TCI state set for one BWP of a serving cell, the first indication information indicates a TCI state set for one BWP of the serving cell, and the first TCI state set is the indicated TCI state set.

[0102] For example, one piece of indication information is limited to indicating only one TCI state set for one BWP of one serving cell, and the first TCI state set is the indicated TCI state set.

[0103] For example, as shown in FIG. 6, the BWP of a serving cell is configured with a TCI state set. Only one TCI state set in FIG. 6 is configured for one transmission direction (downlink or uplink). In other words, even if there are multiple serving cells (or BWPs), only one TCI state set can be configured for one BWP of one of the serving cells. For example, in FIG. 6, one TCI state set is configured for only First cell 1, and no TCI state set is configured for the other First cells. Therefore, the first serving cell set is the configured TCI state set. Note that the above description is for a single transmission direction only, but this can be easily extended to the case of multiple transmission directions. For example, the first indication information can configure one "downlink or joint TCI state set" for one downlink BWP of the first serving cell, and one "uplink TCI state set" for one uplink BWP of the second serving cell. The first serving cell and the second serving cell may be the same or different. The first TCI state set applied to the downlink is a configured "downlink or joint TCI state set," and the first TCI state set applied to the uplink is a configured "uplink TCI state set."

[0104] For example, the first indication information is limited to indicating a TCI state set for one BWP of the primary cell (Pcell), and the first indication information configures one "downlink or joint TCI state set" for one downlink BWP of the Pcell and one "uplink TCI state set" for one uplink BWP of the primary cell (Pcell). The first TCI state set applied to the downlink is the configured "downlink or joint TCI state set," and the first TCI state set applied to the uplink is the configured "uplink TCI state set."

[0105] In some embodiments, when the first indication information indicates a TCI state set of one BWP of a serving cell, the second indication information further indicates the serving cell and the BWP of the serving cell, where the first TCI state set is the TCI state set indicated by the BWP of the serving cell indicated by the second indication information.

[0106] For example, the second indication information indicates a serving cell and a BWP of the serving cell, and the first TCI state set is a TCI state set configured for the BWP of the serving cell.

[0107] 8 is a schematic diagram of another example of a TCI state indication according to an embodiment of the present invention. As shown in FIG. 8, a terminal device configures multiple serving cells, and the BWPs of multiple serving cells (first cell 1 and first cell 3) are configured with TCI state sets as shown in FIG. 6, but description thereof will be omitted here. It is necessary to further determine from which TCI state set the third indication information indicates the TCI state among the multiple TCI state sets, i.e., it is necessary to determine the first TCI state set. For example, the second indication information is information carried by a cell switching command, and the second indication information (i.e., the cell switching command) indicates a serving cell ID and a BWP ID. A TCI state set is configured for each cell and each BWP. One serving cell and one BWP of the serving cell can uniquely determine one TCI state set, and therefore the first TCI state set is this determined TCI state set. Although the above description is for a single transmission direction, it can be easily extended to the case of multiple transmission directions. For example, the second instruction information indicates a first serving cell and one downlink BWP for the first serving cell, and indicates a second serving cell and one uplink BWP for the second serving cell, where the first serving cell and the second serving cell may be the same or different. The first TCI state set applied to the downlink is the TCI state set configured for the downlink BWP for the first serving cell, and the first TCI state set applied to the uplink is the TCI state set configured for the uplink BWP for the second serving cell. For example, for the TCI states specifically indicated in the first TCI state set, please refer to the related description of Figure 6 above, which will not be repeated here.

[0108] In some embodiments, the terminal device receives second indication information on a downlink BWP of a serving cell, and the first TCI state set to be applied to the downlink is a TCI state set configured for the downlink BWP of the serving cell, and / or the first TCI state set to be applied to the uplink is a TCI state set configured for one uplink BWP of the serving cell, which uplink BWP is predefined or indicated by the second indication information.

[0109] For example, the second indication information is information carried by a cell switch command. When the terminal device receives the cell switch command on a downlink BWP of a serving cell, the first TCI state set applied to the downlink is a "downlink or joint TCI state set" set configured for the downlink BWP of the serving cell. The first TCI state set applied to the uplink is an uplink TCI state set configured for an uplink BWP of the serving cell, and this uplink BWP is, for example, a predefined BWP, such as a currently activated uplink BWP or an initial uplink BWP, and this uplink BWP is also the uplink BWP indicated by the second indication information.

[0110] In some embodiments, when the first instruction information indicates one TCI state set for one BWP of a candidate cell, for one target cell, the first TCI state set is the TCI state set indicated for the first BWP of the target cell.

[0111] For example, as shown in Figure 7, the BWP of each candidate cell is configured with one TCI state set, and it is further necessary to determine from which TCI state set the third indication information indicates the TCI state among the multiple TCI state sets, i.e., to determine the first TCI state set. The terminal device switches to one or more target cells, and for one target cell, the first TCI state set is the TCI state set configured for the first BWP of the target cell. In other words, each target cell is associated with the first TCI state set.

[0112] The following describes how the target cell is determined.

[0113] In some embodiments, the target cell is determined based on a reference signal in the TCI state indicated by the second indication information or indicated by the third indication information.

[0114] For example, the target cell is determined based on a reference signal in the TCI state indicated by the third indication information.

[0115] For example, if the reference signal in the TCI state indicated by the third indication information is from the first candidate cell, the target cell is the first candidate cell. As shown in FIG. 6, the third indication information indicates a TCI state from the first TCI state set. As shown in Table 1, for the indicated TCI state, the expression "TCI state" IE indicates that the reference signal in the TCI state is from the candidate cell if the "candidateCell" IE is present, where "CandidateCellIndex" indicates the cell index (Cell ID) or PCI index (TCI state) of the candidate cell, and if the "candidateCell" IE is absent, it indicates that the reference signal in the TCI state is from the serving cell (this serving cell is not the candidate cell). If the third indication information indicates a TCI state in which the reference signal is from a candidate cell, the target cell to which the TCI state is applied is the candidate cell.

[0116] [Table 1] In some embodiments, the target cell is indicated by a second indication.

[0117] In some embodiments, the one or more target cells are explicitly indicated by the second indication information, for example, by indicating a "candidate configuration index" and a "cell ID" to indicate the target cell(s).

[0118] 9 is a schematic diagram of an example of target cell indication according to an embodiment of the present invention. As shown in FIG. 9, the "candidate cell configuration" configures one or more groups of candidate cells. For example, the candidate cells of one group may be a group of non-serving cells in the figure, and the candidate cells of this group may be a group of cells in carrier aggregation, for example, {third cell 1, third cell 2, ...}. The "candidate configuration index" is used as a group index to determine the group of candidate cells. Within the group of candidate cells, the cell ID further determines one candidate cell in the group, for example, third cell 1 in {third cell 1, third cell 2, ...}, as the target cell.

[0119] In some embodiments, if the second instruction information indicates only some of the candidate cells associated with the "candidate configuration index" as target cells, the candidate cells that are not indicated are considered to be deactivated cells.

[0120] For example, if the second instruction information indicates some candidate cells in the set of non-serving cells in Fig. 9 as target cells, the terminal device switches to these target cells, regards these target cells as carrier aggregation cells, and regards non-indicated cells as deactivated cells of carrier aggregation. For example, for the set of non-serving cells {third cell 1, third cell 2, ...}, only third cell 1 is indicated as the target cell, and the non-indicated third cell 2 is indicated as a deactivated cell.

[0121] The following describes how the first BWP is determined.

[0122] In some embodiments, the first BWP of the target cell is indicated by the second indication information or is determined based on candidate cell configuration information.

[0123] In some embodiments, the first BWP of the target cell is indicated by the second indication.

[0124] For example, multiple BWPs are configured for one target cell, and the second instruction information may indicate one of them as a first BWP. The first BWP of one target cell is associated with a TCI state indicated by the third instruction information, and the terminal device applies the TCI state indicated by the third instruction information to the first BWP of the target cell.

[0125] In some embodiments, the first BWP is determined by indication information in the candidate cell configuration.

[0126] For example, the "CellGroupConfig" IE provides candidate cell configuration information, and in the "CellGroupConfig", the first BWP applied to the downlink (downlink BWP) is determined by the "firstActiveDownlinkBWP-Id" under the "ServingCellConfig", and the first BWP applied to the uplink (uplink BWP) is determined by the "firstActiveUplinkBWP-Id" under the "UplinkConfig" of the "ServingCellConfig". Here, both "firstActiveDownlinkBWP-Id" and "firstActiveUplinkBWP-Id" are indication information in the "candidate cell configuration".

[0127] The following describes the application of the TCI state to the target cell.

[0128] In some embodiments, the terminal device applies the TCI state indicated by the third indication information to a second BWP of a second target cell, where the second target cell and the target cell are in one TCI state update list, and the second BWP has the same BWP index (BWP ID) as the first BWP.

[0129] In some embodiments, the third instruction information indicates a fourth TCI state to be applied to a fourth BWP of the first target cell, and the terminal device applies the fourth TCI state to a fifth BWP of the second target cell, where the second target cell is in the same TCI state update list as the first target cell, and the fourth BWP has the same BWP ID as the fifth BWP.

[0130] For example, the terminal device determines the TCI state of each target cell based on the third instruction information and the TCI state update list. The terminal device switches to a target cell of multiple carrier aggregation, and therefore, a TCI state needs to be applied to each target cell. The "candidate cell configuration" includes the configuration of the TCI state update list. For example, the "CellGroupConfig" that provides the "candidate cell" configuration information includes one or more TCI state update lists ("simultaneousU-TCI-UpdateList"). In this case, the third instruction information does not need to indicate a TCI state for each target cell, and the terminal device may determine the TCI state of each target cell based on the third instruction information and the TCI state update list. If the first target cell and the second target cell belong to the same TCI state update list and the third instruction information indicates a TCI state to be applied to a BWP (fourth BWP) of the first target cell, the terminal device also applies the TCI state to a BWP (fifth BWP) having the same BWP ID of the second target cell.

[0131] In some embodiments, if the unified TCI state type (unifiedTCI-StateType) configured for the target cell is joint, the terminal device applies the TCI state indicated by the third indication information to both the downlink BWP and the uplink BWP of the target cell.

[0132] For example, if the third instruction information indicates one TCI state to be applied to the target cell and the "unifiedTCI-StateType" configured for the target cell is "joint", the terminal device applies the TCI state to both the downlink BWP and uplink BWP of the target cell.

[0133] For example, for one target cell, the terminal device determines the TCI states of the downlink BWP and the uplink BWP based on the third indication information and "unifiedTCI-StateType." The "candidate cell configuration" includes the configuration of "unifiedTCI-StateType" for each candidate cell, and if the "unifiedTCI-StateType" of the target cell is "joint," the third indication information can indicate only one TCI state, and the terminal device applies the TCI state to both the first BWP applied to the downlink and the first BWP applied to the uplink.

[0134] In some embodiments, the third indication indicates a plurality of TCI states for the first BWP of the target cell, where the plurality of TCI states are TCI states activated for the first BWP of the target cell, and the first TCI state of the plurality of TCI states is a TCI state applied to the first BWP of the target cell.

[0135] For example, for one BWP of one target cell, the third instruction information indicates multiple TCI states for the BWP, where the first TCI state is a TCI state applied to the BWP and the multiple TCI states are TCI states activated for the BWP.

[0136] For example, for one target cell, the third instruction information indicates not only the TCI state to be applied to the target cell but also the TCI state activated for the target cell. In this way, when the TCI state needs to be updated after switching to the target cell, the DCI can be directly used to indicate one of the activated TCI states as the TCI state to be applied to the target cell, thereby enabling faster beam updating. For one BWP of one target cell, the third instruction information indicates multiple TCI states, and these TCI states are the TCI states activated for that BWP, where the first TCI state is the TCI state to be applied to that BWP by default. That is, after switching to a TCI state, the terminal device may apply the first TCI state to that BWP. Note that the "first TCI state" can be replaced with either the "last TCI state" or a specified TCI state.

[0137] In the present invention, the "first instruction information" may include one or more pieces of information, and for convenience of explanation, they will be collectively referred to as the first instruction information. The above explanation also applies to the second instruction information and the third instruction information.

[0138] In some embodiments, the first indication information is carried by RRC signaling, and / or the second indication information is carried by MAC CE, and / or the third indication information is carried by MAC CE or DCI.

[0139] In some embodiments, the second indication information and the third indication information are carried by one MAC CE, or the second indication information is carried by one MAC CE and the third indication information is carried by another MAC CE, and the MAC CE carrying the second indication information and the MAC CE carrying the third indication information are carried by one PDSCH, or the second indication information is carried by one MAC CE and the third indication information is carried by one DCI and at least one MAC CE, and the MAC CE carrying the second indication information and the MAC CE carrying the third indication information are carried by a MAC CE scheduled by the DCI.

[0140] In some embodiments, the first indication information is carried by RRC signaling.

[0141] For example, the first indication information is carried by one or more RRC signaling (or RRC IEs). The expression "the first indication information is carried by RRC signaling" may be replaced with "the TCI state set is configured by RRC signaling", for example, configured per cell per BWP (per BWP). The expression "indicated by the first indication information" may also be replaced with "configured by the first indication information".

[0142] In some embodiments, the second indication information is carried by one MAC CE.

[0143] For example, the second indication information is carried by a cell switch command, which is a type of MAC CE, and the second indication information is carried by one or more fields of the MAC CE. The expression "the second indication information is carried and transmitted by one MAC CE" can be replaced with "the content indicated by the second indication information is instructed by the MAC CE."

[0144] In some embodiments, the second indication information and the third indication information are carried by one MAC CE.

[0145] For example, the cell switch command is a type of MAC CE, and the MAC CE indicates cell switch (carries the second indication information) and indicates one TCI state (carries the third indication information) for the BWP of each target cell. The expression "the second indication information and the third indication information are carried by the MAC CE" can be replaced with "the contents indicated by the second indication information and the third indication information are indicated by the MAC CE."

[0146] In some embodiments, the second indication information is carried by one MAC CE, the third indication information is carried by at least one MAC CE, and the MAC CE carrying the second indication information and the MAC CE carrying the third indication information are carried by one PDSCH.

[0147] For example, the second indication information is carried by one MAC CE (e.g., a cell switch command), the third indication information is carried by at least one MAC CE, and all of these MAC CEs are carried by one PDSCH. The expression "the third indication information is carried by at least one MAC CE" can be replaced with "the TCI state is indicated by at least one MAC CE", e.g., for at least one target cell, the TCI state applied to the BWP of each target cell is indicated by one MAC CE.

[0148] In some embodiments, the second indication information is carried by one MAC CE, the third indication information is carried by one DCI and at least one MAC CE, and the MAC CE carrying the second indication information and the MAC CE carrying the third indication information are carried by a PDSCH scheduled by the DCI.

[0149] For example, the second indication information is carried by one MAC CE, the third indication information is carried by one DCI and at least one MAC CE, and all of these MAC CEs are carried by a PDSCH scheduled by the DCI. The expression "the third indication information is carried by one DCI and at least one MAC CE" can be replaced with "the TCI state is indicated by one DCI and at least one MAC CE", e.g., for at least one target cell, the TCI state applied to the BWP of the Pcell is indicated by the DCI, and the TCI state applied to the BWP of at least one Scell ​​is indicated by at least one MAC CE.

[0150] After determining the TCI state set, the first TCI state set, the target cell and the first BWP, the TCI state, the first instruction information, the second instruction information, the third instruction information, etc. as described above, the flow by which the terminal device determines the TCI state will be explained again by way of example.

[0151] The present invention may be any combination of the above-mentioned embodiments, and the following describes some combinations thereof as examples. For the sake of convenience, only the important parts thereof will be described, and parts not mentioned may be identified using any of the above-mentioned methods.

[0152] For example, a terminal device is configured with a UE-specific TCI state set to be applied to the downlink (a first TCI state set to be applied to the downlink) and a UE-specific TCI state set to be applied to the uplink (a first TCI state set to be applied to the uplink), i.e., the TCI state sets are not configured for each cell and for each BWP. The terminal device receives a cell switch command. For a target cell, the cell switch command indicates a TCI state set for a first BWP to be applied to the downlink of the target cell from the first TCI state set to be applied to the downlink, and indicates a TCI state set for a first BWP to be applied to the uplink of the target cell from the first TCI state set to be applied to the uplink.

[0153] For example, a terminal device may configure one or more serving cells, each serving cell may be configured with one or more downlink BWPs and one or more uplink BWPs, and each BWP of each serving cell may be configured with a TCI state set. The terminal device receives a cell switch command. The cell switch command indicates one serving cell, and one downlink BWP and one uplink BWP of the serving cell. The TCI state set applied to the downlink is the TCI state set configured for the downlink BWP of the serving cell, and the TCI state set applied to the uplink is the set configured for the uplink BWP of the serving cell. For one target cell (serving cell), the cell switch command indicates one TCI state for the first BWP to be applied to the downlink of the target cell (serving cell) from the first TCI state set applied to the downlink, and indicates one TCI state for the first BWP to be applied to the uplink of the target cell (serving cell) from the TCI state set applied to the uplink.

[0154] For example, a terminal device configures one or more serving cells, each serving cell configures one or more downlink BWPs and one or more uplink BWPs, one downlink BWP of a Pcell (or SpCell) configures a TCI state set to be applied to the downlink (i.e., a first TCI state set to be applied to the downlink), and one uplink BWP of the Pcell (or SpCell) configures a TCI state set to be applied to the uplink (i.e., a first TCI state set to be applied to the uplink). The terminal device receives a cell switch command. For one target cell (serving cell), the cell switch command indicates one TCI state for the first BWP to be applied to the downlink of the target cell (Pcell) from the first TCI state set to be applied to the downlink, and indicates one TCI state for the first BWP to be applied to the uplink of the target cell (TCI state) from the first TCI state set to be applied to the uplink.

[0155] For example, the terminal device may configure one or more candidate cells, each of which may be configured with one or more downlink BWPs and one or more uplink BWPs, and each BWP of each candidate cell may be configured with one TCI state set. The terminal device may receive a cell switch command. The cell switch command indicates one or more target cells. For one target cell, a first TCI state set applied to the downlink is the TCI state set configured for the first BWP applied to the downlink of the target cell, and a first TCI state set applied to the uplink is the TCI state set configured for the first BWP applied to the uplink of the target cell. For one target cell, the cell switch command indicates one target cell from a first TCI state set applied to the downlink for a first BWP to be applied to the downlink of the target cell, and indicates one TCI state from a first TCI state set applied to the uplink for a first BWP to be applied to the uplink of the target cell.

[0156] This allows the terminal device to quickly apply an appropriate TCI state after cell switching, thereby reducing the switching interruption time.

[0157] 5 to 9 merely show schematic diagrams of embodiments of the present invention, but the present invention is not limited thereto. For example, the execution order of various steps may be appropriately adjusted, some other steps may be added, or some steps may be removed. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the descriptions of the above FIGS. 5 to 9.

[0158] The above-described embodiments are merely illustrative of the present invention, and the present invention is not limited thereto. Appropriate modifications may be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or one or more of the above-described embodiments may be used in combination.

[0159] According to this embodiment, the terminal device can quickly apply an appropriate TCI state after cell switching based on the first instruction information, the second instruction information, and the third instruction information, thereby shortening the switching interruption time.

[0160] <Example 2> The embodiment of the present invention provides a data receiving method, which is applied to a terminal device side. Description of the same contents as in the first embodiment will be omitted.

[0161] 10 is a schematic diagram of another example of a data receiving method according to an embodiment of the present invention. As shown in FIG. 10, the method includes the following steps:

[0162] Step 1001: The terminal device receives fourth indication information, which indicates at least one transmission configuration indication state (TCI state) set.

[0163] Step 1002: The terminal device receives fifth indication information, which indicates at least one TCI state subset, and for a TCI state set, the fifth indication information indicates a TCI state subset in the TCI state set.

[0164] Step 1003: The terminal device receives sixth indication information, which indicates that the terminal device should switch to at least one target cell, and the target cell is one of candidate cells configured for the terminal device.

[0165] Step 1004: The terminal device receives seventh indication information, which indicates, for the target cell, a transmission configuration indication state (TCI state) to be applied to a third bandwidth portion (BWP) of the target cell from a second transmission configuration indication state (TCI state) set, and the second transmission configuration indication state (TCI state) set is one of the transmission configuration indication state (TCI state) subsets indicated by the fifth indication information.

[0166] This allows the terminal device to quickly apply an appropriate TCI state after cell switching, thereby reducing switching interruption time.

[0167] It should be noted that the above-mentioned Figure 10 merely illustrates an example of the present invention, and the present invention is not limited thereto. For example, the execution order of various steps may be appropriately adjusted, some other steps may be added, or some steps may be removed. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the description of the above-mentioned Figure 10.

[0168] In some embodiments, if the TCI state subset indicated for the BWP of the target cell by the fifth indication information includes a TCI state, the TCI state is the TCI state applied to the BWP of the target cell.

[0169] For example, as a difference from the above-mentioned first embodiment, after indicating (configuring) one or more TCI state sets, the terminal device further indicates (activates or configures) one or more subsets of the TCI states. For one TCI state set, the fifth indication information indicates one subset of the TCI states, and the subset of the TCI states includes one or more TCI states from the above-mentioned TCI state sets. For a target cell, the TCI state applied to the BWP of the target cell is from one TCI state subset. For example, the "TCI state subset" of the second embodiment of the present invention can be applied correspondingly to the related process in the "TCI state set" of the first embodiment. For example, the method of the first embodiment may be reused. As in the first embodiment, the method for determining the "second TCI state set" may refer to the method for determining the "first TCI state set," the method for determining the "third BWP" may refer to the method for determining the "first BWP," the specific content of the "fourth instruction information" may refer to the "first instruction information," the specific content of the "sixth instruction information" may refer to the "second instruction information," and the specific content of the "seventh instruction information" may refer to the "third instruction information." These details will not be described again here.

[0170] In some embodiments, for a target cell, if the subset of TCI states indicated for one BWP of the target cell by the fifth instruction information includes only one TCI state, the TCI state is the TCI state applied to the BWP of the target cell.

[0171] For example, if one TCI state set is configured for one BWP of one target cell and then the fifth instruction activates the only TCI state in the TCI state set, the TCI state is the TCI state applied to the BWP of the target cell. In other words, the seventh instruction (e.g., carried by a cell switching command) does not need to indicate the TCI state applied to the BWP of the target cell, and the TCI state indicated by the fifth instruction is the TCI state applied to the BWP of the target cell.

[0172] In some embodiments, the fifth indication information is carried by the MAC CE.

[0173] For example, for one TCI state set configured by the fourth indication information (e.g., RRC signaling), the fifth indication information (e.g., MAC CE) activates one or more TCI states in the TCI state set, i.e., indicates one TCI state subset.

[0174] In some embodiments, the fifth indication indicates a TCI state subset for the serving cell.

[0175] For example, the fourth instruction information (e.g., RRC signaling) configures a TCI state set for one BWP of one serving cell, and the fifth instruction information (e.g., MAC CE) activates one or more TCI states in the TCI state set.

[0176] In some embodiments, the fifth indication indicates a TCI state set for the candidate cell.

[0177] For example, the fourth instruction information (e.g., RRC signaling) configures a TCI state set for one BWP of one candidate cell, and the fifth instruction information (e.g., MAC CE) activates one or more TCI states in the TCI state set.

[0178] In some embodiments, the fifth indication information indicates a "candidate configuration index" and a "cell ID."

[0179] For example, to determine which candidate cell the fifth indication information indicates, the fifth indication information indicates a subset of the TCI state, the fifth indication information indicates one candidate cell by indicating a "candidate configuration index" and a "cell ID." For example, the indication method in the first embodiment can be referred to, and will not be described again here.

[0180] The above-described embodiments are merely illustrative of the present invention, and the present invention is not limited thereto. Appropriate modifications may be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or one or more of the above-described embodiments may be used in combination.

[0181] According to this embodiment, the terminal device can quickly apply an appropriate TCI state after cell switching based on the fourth, fifth, sixth, and seventh instruction information, thereby shortening the switching interruption time.

[0182] Example 3 An embodiment of the present invention provides a data transmission method, which is applied to a network device side. The embodiment of the present invention may be implemented in combination with the first embodiment, or may be implemented independently. Descriptions of the same contents as the first embodiment will be omitted.

[0183] 11 is a schematic diagram of another example of a data transmission method according to an embodiment of the present invention. As shown in FIG. 11, the method includes the following steps:

[0184] Step 1101: The network device sends first indication information, which indicates at least one transmission configuration indication state (TCI state) set.

[0185] Step 1102: The network device side sends second instruction information, which instructs the terminal device to switch to at least one target cell.

[0186] Step 1103: The network device sends third instruction information, which indicates, for the target cell, a transmission configuration indication state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from a first transmission configuration indication state (TCI state) set, and the first transmission configuration indication state (TCI state) set is one of the transmission configuration indication state (TCI state) sets indicated by the first instruction information.

[0187] It should be noted that the above-mentioned FIG. 11 merely illustrates an example of the present invention, and the present invention is not limited thereto. For example, the execution order of various steps may be appropriately adjusted, some other steps may be added, or some steps may be removed. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the description of the above-mentioned FIG. 11.

[0188] The above-described embodiments are merely illustrative of the present invention, and the present invention is not limited thereto. Appropriate modifications may be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or one or more of the above-described embodiments may be used in combination.

[0189] According to this embodiment, the terminal device can quickly apply an appropriate TCI state after cell switching based on the first instruction information, the second instruction information, and the third instruction information, thereby shortening the switching interruption time.

[0190] Example 4 An embodiment of the present invention provides a data transmission method, which is applied to a network device side. The embodiment of the present invention may be implemented in combination with embodiment 1 or embodiment 2, or may be implemented alone. Descriptions of the same contents as embodiment 1 and embodiment 2 will be omitted.

[0191] 12 is a schematic diagram of another example of a data transmission method according to an embodiment of the present invention. As shown in FIG. 12, the method includes the following steps:

[0192] Step 1201: The network device sends fourth instruction information, which indicates at least one transmission configuration indication state (TCI state) set.

[0193] Step 1202: The network device sends fifth instruction information, which indicates at least one TCI state subset, and for each TCI state set, the fifth instruction information indicates a TCI state subset in the TCI state set.

[0194] Step 1203: The network device side sends sixth instruction information, which instructs the terminal device to switch to at least one target cell, and the target cell is one of the candidate cells configured for the terminal device.

[0195] Step 1204: The network device sends seventh instruction information, which indicates, for the target cell, a TCI state to be applied to the third bandwidth portion (BWP) of the target cell from the second TCI state set, where the second TCI state set is one of the TCI state subsets indicated by the fifth instruction information.

[0196] It should be noted that the above-mentioned FIG. 12 merely illustrates an example of the present invention, and the present invention is not limited thereto. For example, the execution order of various steps may be appropriately adjusted, some other steps may be added, or some steps may be removed. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the description of the above-mentioned FIG. 12.

[0197] The above-described embodiments are merely illustrative of the present invention, and the present invention is not limited thereto. Appropriate modifications may be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or one or more of the above-described embodiments may be used in combination.

[0198] According to this embodiment, the terminal device can quickly apply an appropriate TCI state after cell switching based on the fourth instruction information, the fifth instruction information, the sixth instruction information, and the seventh instruction information, thereby shortening the switching interruption time.

[0199] <Example 5> An embodiment of the present invention provides a data receiving device. The device may be, for example, a terminal device, or one or more elements or components configured in the terminal device. Descriptions of the same content as in the first embodiment will be omitted.

[0200] 13 is a schematic diagram of an example of a data receiving device according to an embodiment of the present invention. As shown in FIG. 13, a data receiving device 1300 includes the following units.

[0201] The first receiving unit 1301 receives first indication information, which indicates at least one transmission configuration indication state (TCI state) set.

[0202] The second receiving unit 1302 receives second instruction information. The second instruction information instructs the terminal device to switch to at least one target cell.

[0203] The third receiving unit 1303 receives third instruction information. For the target cell, the third instruction information indicates a transmission configuration instruction state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from a first transmission configuration instruction state (TCI state) set, and the first transmission configuration instruction state (TCI state) set is one of the transmission configuration instruction state (TCI state) sets indicated by the first instruction information.

[0204] In some embodiments, the target cell is one of at least one candidate cell configured for the terminal device, the at least one candidate cell including a serving cell and / or a non-serving cell.

[0205] In some embodiments, the first indication information indicating at least one set of transmission configuration indication states (TCI states) comprises: the first indication information indicating a transmission configuration indication state (TCI state) set for the terminal device; The first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of a serving cell; or The first indication information includes at least one of indicating a transmission configuration indication state (TCI state) set for one bandwidth portion (BWP) of the candidate cell.

[0206] In some embodiments, when the first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of the serving cell, when the unified TCI state type (unifiedTCI-StateType) configured for at least one candidate cell is separate, the first indication information indicates a downlink transmission configuration indication state (TCI state) set or a joint transmission configuration indication state (TCI state) for a downlink bandwidth portion (BWP) of a first serving cell, and indicates an uplink transmission configuration indication state (TCI state) set for an uplink bandwidth portion (BWP) of a second serving cell, wherein the first serving cell is the same as or different from the second serving cell.

[0207] In some embodiments, when the first indication information indicates a transmission configuration indication state (TCI state) set for the terminal device, when a unified TCI state type (unifiedTCI-StateType) configured for at least one candidate cell is separate, the first indication information indicates a downlink or joint TCI state set for the terminal device and indicates an uplink TCI state set for the terminal device.

[0208] In some embodiments, when the first indication information indicates a transmission configuration indication state (TCI state) set for a terminal device, or when the first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of a serving cell, the transmission configuration indication state (TCI state) set includes at least one first transmission configuration indication state (TCI state) and at least one second transmission configuration indication state (TCI state), or the transmission configuration indication state (TCI state) set includes at least one second transmission configuration indication state (TCI state), and the first transmission configuration indication state (TCI state) is applied to the bandwidth portion (BWP) of the serving cell, and the second transmission configuration indication state (TCI state) is applied to the bandwidth portion (BWP) of a candidate cell.

[0209] In some embodiments, the transmission configuration indication state (TCI state) set is indicated in the serving cell configuration information.

[0210] In some embodiments, when the first indication information indicates a transmission configuration indication state (TCI state) set for one bandwidth portion (BWP) of the candidate cell, the transmission configuration indication state (TCI state) set includes at least one third transmission configuration indication state (TCI state), and the third transmission configuration indication state (TCI state) is applied to the bandwidth portion (BWP) of the candidate cell.

[0211] In some embodiments, a set of transmission configuration indication states (TCI states) is indicated in the candidate cell configuration information.

[0212] In some embodiments, when the first indication information indicates a transmission configuration indication state (TCI state) set for the terminal device, the first transmission configuration indication state (TCI state) set is the indicated transmission configuration indication state (TCI state) set.

[0213] In some embodiments, if the first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of a serving cell, the first indication information indicates a transmission configuration indication state (TCI state) set for the bandwidth portion (BWP) of the serving cell, and the first transmission configuration indication state (TCI state) is the indicated transmission configuration indication state (TCI state) set.

[0214] In some embodiments, when the first instruction information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of the serving cell, the second instruction information further indicates a serving cell and a bandwidth portion (BWP) of the serving cell, and the first transmission configuration indication state (TCI state) set is a transmission configuration indication state (TCI state) set indicated for the bandwidth portion (BWP) of the serving cell indicated by the second instruction information.

[0215] In some embodiments, if the first indication information indicates a transmission configuration indication state (TCI state) set for one bandwidth portion (BWP) of a candidate cell, then for a target cell, the first transmission configuration indication state (TCI state) set is a transmission configuration indication state (TCI state) set indicated for the first bandwidth portion (BWP) of the target cell.

[0216] In some embodiments, the target cell is determined based on a reference signal in a transmission configuration indication state (TCI state) indicated by the second indication information or indicated by the third indication information.

[0217] In some embodiments, the first bandwidth portion (BWP) of the target cell is indicated by the second indication information or is determined based on candidate cell configuration information.

[0218] In some embodiments, the data receiving device 1300 further includes a first applying unit 1304 that applies a transmission configuration indication state (TCI state) indicated by the third indication information to a second bandwidth portion (BWP) of a second target cell, where the second target cell and the target cell are in a transmission configuration indication state (TCI state) update list, and the bandwidth portion index (BWP ID) of the second bandwidth portion (BWP) and the bandwidth portion index (BWP ID) of the first bandwidth portion (BWP) are identical.

[0219] In some embodiments, the data receiving device 1300 further includes a second applying unit 1305 that applies the transmission configuration indication state (TCI state) indicated by the third indication information to the downlink bandwidth portion (BWP) and the uplink bandwidth portion (BWP) of the target cell if the unified TCI state type (unifiedTCI-StateType) configured for the target cell is joint.

[0220] In some embodiments, the third instruction information indicates a plurality of transmission configuration indication states (TCI states) for a first bandwidth portion (BWP) of the target cell, the plurality of transmission configuration indication states (TCI states) being transmission configuration indication states (TCI states) activated for the first bandwidth portion (BWP) of the target cell, and a first transmission configuration indication state (TCI state) of the plurality of transmission configuration indication states (TCI states) being a transmission configuration indication state (TCI state) applied to the first bandwidth portion (BWP) of the target cell.

[0221] The above-described embodiments are merely examples of the present invention, and the present invention is not limited thereto. Appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments can be used alone, or one or more of the above-described embodiments can be used in combination.

[0222] Although the above description only describes components or modules related to the present invention, the present invention is not limited thereto. The data receiving device 1300 may further include other components or modules. For specific details of these components or modules, please refer to the related art.

[0223] 13 only exemplifies the connection relationships or signal directions between various components or modules, but it will be apparent to those skilled in the art that various related technologies such as bus connections can be used. The various components or modules described above may be implemented by hardware devices such as a processor, a memory, a transmitter, and a receiver, and the present invention is not limited thereto.

[0224] According to this embodiment, the terminal device can quickly apply an appropriate TCI state after cell switching based on the first instruction information, the second instruction information, and the third instruction information, thereby shortening the switching interruption time.

[0225] Example 6 An embodiment of the present invention provides a data receiving device. The device may be, for example, a terminal device, or one or more elements or components configured in the terminal device. Descriptions of the same content as in the second embodiment will be omitted.

[0226] 14 is a schematic diagram of another example of a data receiving device according to an embodiment of the present invention. As shown in FIG. 14, a data receiving device 1400 includes the following units.

[0227] The fourth receiving unit 1401 receives fourth indication information. The fourth indication information indicates at least one transmission configuration indication state (TCI state) set.

[0228] The fifth receiving unit 1402 receives fifth instruction information. The fifth instruction information indicates at least one transmission configuration instruction state (TCI state) subset, and for a transmission configuration instruction state (TCI state) set, the fifth instruction information indicates a transmission configuration instruction state (TCI state) subset in the transmission configuration instruction state (TCI state) set.

[0229] The sixth receiving unit 1403 receives sixth instruction information. The sixth instruction information instructs the terminal device to switch to at least one target cell, where the target cell is one of candidate cells configured for the terminal device.

[0230] The seventh receiving unit 1404 receives seventh indication information. For the target cell, the seventh indication information indicates a transmission configuration indication state (TCI state) to be applied to a third bandwidth portion (BWP) of the target cell from a second transmission configuration indication state (TCI state) set, where the second transmission configuration indication state (TCI state) set is one of the transmission configuration indication state (TCI state) subsets indicated by the fifth indication information.

[0231] In some embodiments, if the TCI state subset indicated for the BWP of the target cell by the fifth indication information includes a TCI state, the TCI state is the TCI state applied to the BWP of the target cell.

[0232] The above-described embodiments are merely examples of the present invention, and the present invention is not limited thereto. Appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments can be used alone, or one or more of the above-described embodiments can be used in combination.

[0233] Although the above description only describes components or modules related to the present invention, the present invention is not limited thereto. The data receiving device 1400 may further include other components or modules. For specific details of these components or modules, please refer to the related art.

[0234] 14 only exemplifies the connection relationships or signal directions between various components or modules, but it will be apparent to those skilled in the art that various related technologies such as bus connections can be used. The various components or modules described above may be implemented by hardware devices such as a processor, a memory, a transmitter, and a receiver, and the present invention is not limited thereto.

[0235] According to this embodiment, the terminal device can quickly apply an appropriate TCI state after cell switching based on the fourth, fifth, sixth, and seventh instruction information, thereby shortening the switching interruption time.

[0236] Example 7 An embodiment of the present invention provides a data transmission device. The device may be, for example, a network device, or one or more elements or components configured in the network device. Descriptions of the same content as in the first embodiment will be omitted.

[0237] 15 is a schematic diagram of an example of a data transmission device according to an embodiment of the present invention. As shown in FIG. 15, a data transmission device 1500 includes the following units.

[0238] The first transmitting unit 1501 transmits first indication information, which indicates at least one transmission configuration indication state (TCI state) set.

[0239] The second transmitting unit 1502 transmits second instruction information. The second instruction information instructs the terminal device to switch to at least one target cell.

[0240] The third transmitting unit 1503 transmits third instruction information. For the target cell, the third instruction information indicates a transmission configuration instruction state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from a first transmission configuration instruction state (TCI state) set, and the first transmission configuration instruction state (TCI state) set is one of the transmission configuration instruction state (TCI state) sets indicated by the first instruction information.

[0241] The above-described embodiments are merely examples of the present invention, and the present invention is not limited thereto. Appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments can be used alone, or one or more of the above-described embodiments can be used in combination.

[0242] Although the above description only describes components or modules related to the present invention, the present invention is not limited thereto. The data transmission device 1500 may further include other components or modules. For specific details of these components or modules, reference may be made to related art.

[0243] 15 only exemplifies the connection relationships or signal directions between various components or modules, but it will be apparent to those skilled in the art that various related technologies such as bus connections can be used. The various components or modules described above may be implemented by hardware devices such as a processor, a memory, a transmitter, and a receiver, and the present invention is not limited thereto.

[0244] According to this embodiment, the terminal device can quickly apply an appropriate TCI state after cell switching based on the first instruction information, the second instruction information, and the third instruction information, thereby shortening the switching interruption time.

[0245] Example 8 An embodiment of the present invention provides a data transmission device. The device may be, for example, a network device, or one or more elements or components configured in the network device. Descriptions of the same content as in the second embodiment will be omitted.

[0246] 16 is a schematic diagram of another example of a data transmission device according to an embodiment of the present invention. As shown in FIG. 16, a data transmission device 1600 includes the following units.

[0247] The fourth transmitting unit 1601 transmits fourth indication information. The fourth indication information indicates at least one transmission configuration indication state (TCI state) set.

[0248] The fifth transmitting unit 1602 transmits fifth instruction information. The fifth instruction information indicates at least one transmission configuration instruction state (TCI state) subset, and for a transmission configuration instruction state (TCI state) set, the fifth instruction information indicates a transmission configuration instruction state (TCI state) subset in the transmission configuration instruction state (TCI state) set.

[0249] The sixth transmitting unit 1603 transmits sixth instruction information. The sixth instruction information instructs the terminal device to switch to at least one target cell, where the target cell is one of candidate cells configured for the terminal device.

[0250] The seventh transmitting unit 1604 transmits seventh indication information. For the target cell, the seventh indication information indicates a transmission configuration indication state (TCI state) to be applied to the third bandwidth portion (BWP) of the target cell from the second transmission configuration indication state (TCI state) set, where the second transmission configuration indication state (TCI state) set is one of the transmission configuration indication state (TCI state) subsets indicated by the fifth indication information.

[0251] The above-described embodiments are merely examples of the present invention, and the present invention is not limited thereto. Appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments can be used alone, or one or more of the above-described embodiments can be used in combination.

[0252] Although the above description is limited to the components or modules related to the present invention, the present invention is not limited thereto. The data transmission device 1600 may further include other components or modules. For specific details of these components or modules, please refer to the related art.

[0253] Furthermore, for convenience of explanation, Figure 16 only exemplifies the connection relationships or signal directions between various components or modules, but it will be apparent to those skilled in the art that various related technologies such as bus connections can be used. The various components or modules described above may be implemented by hardware devices such as a processor, a memory, a transmitter, and a receiver, and the present invention is not limited thereto.

[0254] According to this embodiment, the terminal device can quickly apply an appropriate TCI state after cell switching based on the fourth, fifth, sixth, and seventh instruction information, thereby shortening the switching interruption time.

[0255] Example 9 The embodiment of the present invention further provides a communication system, which may refer to FIG. 1, and the description of the same contents as those in the first to eighth embodiments will be omitted.

[0256] In some embodiments, the communication system 100 may include at least a terminal device and a network device.

[0257] A terminal device receives first instruction information, the first instruction information indicating at least one transmission configuration instruction state (TCI state) set, receives second instruction information, the second instruction information indicating that the terminal device should switch to at least one target cell, and receives third instruction information, where for the target cell, the third instruction information indicates a transmission configuration instruction state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from the first transmission configuration instruction state (TCI state) set, and the first transmission configuration instruction state (TCI state) set is one of the transmission configuration instruction state (TCI state) sets indicated by the first instruction information.

[0258] The network device transmits the first indication information, the second indication information, and the third indication information.

[0259] In some embodiments, the communication system 100 may include at least a terminal device and a network device.

[0260] The terminal device receives fourth instruction information, the fourth instruction information indicating at least one transmission configuration indication state (TCI state) set; receives fifth instruction information, the fifth instruction information indicating at least one transmission configuration indication state (TCI state) subset; for the transmission configuration indication state (TCI state) set, the fifth instruction information indicating a transmission configuration indication state (TCI state) subset in the transmission configuration indication state (TCI state) set; receives sixth instruction information, the sixth instruction information indicating that the terminal device switches to at least one target cell, the target cell being one of candidate cells configured for the terminal device; receives seventh instruction information, for the target cell, the seventh instruction information indicating a transmission configuration indication state (TCI state) to be applied to a third bandwidth portion (BWP) of the target cell from a second transmission configuration indication state (TCI state) set; The set of transmission configuration indication states (TCI states) is one of the subsets of transmission configuration indication states (TCI states) indicated by the fifth indication information.

[0261] The network device transmits the fourth indication information, the fifth indication information, the sixth indication information, and the seventh indication information.

[0262] An embodiment of the present invention further provides a network device, which may be, for example, a base station, but the present invention is not limited thereto and may be other network devices.

[0263] 17 is a schematic diagram of a network device according to an embodiment of the present invention. As shown in FIG. 17, the network device 1700 may include a processor 1710 (e.g., a central processing unit (CPU)) and a memory 1720, which is connected to the processor 1710. The memory 1720 may store various data and may further store an information processing program 1730, which is executed under the control of the processor 1710.

[0264] 17, the network device 1700 may further include a transceiver 1740 and an antenna 1750. The functions of the above components are similar to those of the prior art, and a description thereof will be omitted here. The network device 1700 does not need to include all the units shown in FIG. 17. The network device 1700 may further include units not shown in FIG. 17, and the prior art may be referred to.

[0265] The embodiment of the present invention further provides a terminal device, but the present invention is not limited thereto and may be other devices.

[0266] 18 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in FIG. 18, terminal device 1800 may include a processor 1810 and a memory 1820, where memory 1820 stores data and programs and is connected to processor 1810. It should be noted that this diagram is illustrative, and other types of structures may be used to supplement or replace this structure to achieve communication or other functions.

[0267] For example, the processor 1810 may execute a program to realize the data reception method described in Example 1. For example, the processor 1810 may be configured to execute the following steps: receiving first instruction information, where the first instruction information indicates at least one transmission configuration indication state (TCI state) set; receiving second instruction information, where the second instruction information indicates that the terminal device switches to at least one target cell; and receiving third instruction information, where, for the target cell, the third instruction information indicates a transmission configuration indication state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from the first transmission configuration indication state (TCI state) set, where the first transmission configuration indication state (TCI state) set is one of the transmission configuration indication state (TCI state) sets indicated by the first instruction information.Alternatively, the processor 1810 may receive fourth instruction information, where the fourth instruction information indicates at least one transmission configuration indication state (TCI state) set; receive fifth instruction information, where the fifth instruction information indicates at least one transmission configuration indication state (TCI state) subset, where for the transmission configuration indication state (TCI state) set, the fifth instruction information indicates a transmission configuration indication state (TCI state) subset in the transmission configuration indication state (TCI state) set; receive sixth instruction information, where the sixth instruction information indicates that the terminal device switches to at least one target cell, where the target cell is one of candidate cells configured for the terminal device; and receive seventh instruction information, where for the target cell, the seventh instruction information indicates a transmission configuration indication state (TCI state) to be applied to a third bandwidth portion (BWP) of the target cell from the second transmission configuration indication state (TCI state) set. and indicating a second set of transmission configuration indication states (TCI states), the second set of transmission configuration indication states (TCI states) being one of a subset of transmission configuration indication states (TCI states) indicated by the fifth indication information.

[0268] 18, the terminal device 1800 may further include a communication module 1830, an input unit 1840, a display 1850, a power supply 1860, and the like. Here, the functions of the above units are similar to those of the prior art, and therefore, description thereof will be omitted here. Note that the terminal device 1800 does not need to include all of the units shown in FIG. 18. The terminal device 1800 may further include units not shown in FIG. 18, and prior art may be referred to.

[0269] An embodiment of the present invention further provides a computer-readable program that, when executed in a terminal device, causes the terminal device to execute the data receiving method according to the first or second embodiment.

[0270] An embodiment of the present invention further provides a storage medium having a computer-readable program stored therein, the program causing a terminal device to execute the data receiving method described in embodiment 1 or 2 when the program is executed.

[0271] An embodiment of the present invention further provides a computer-readable program, which, when executed in a terminal device, causes the network device to perform the data transmission method according to the third or fourth embodiment.

[0272] An embodiment of the present invention further provides a storage medium having a computer-readable program stored therein, the program causing a terminal device to execute the data transmission method described in embodiment 3 or 4 when the program is executed.

[0273] The above-described apparatus and method of the present invention may be realized by hardware or a combination of hardware and software. The present invention relates to a computer-readable program that, when executed by a logic unit, causes the logic unit to implement the above-described apparatus or components, or to implement the above-described various methods or steps. The present invention also relates to a storage medium for storing the above-described program, such as a hard disk, magnetic disk, optical disk, DVD, flash memory, etc.

[0274] Each processing method in each device described with reference to the embodiments of the present invention may be implemented by hardware, a software module executed by a processor, or a combination of both. For example, one or more of the functional block diagrams shown in the drawings, or one or more combinations of the functional block diagrams, may correspond to each software module in a computer program flow or each hardware module. These software modules may correspond to each step shown in the drawings. These hardware modules may be implemented by implementing these software modules in hardware, for example, using a field programmable gate array (FPGA).

[0275] The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, mobile hard disk, CD-ROM, or any other form of storage medium known to those skilled in the art. The storage medium may be connected to the processor so that the processor reads information from or writes information to the storage medium, or the storage medium may be a component of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card inserted into the mobile terminal. For example, if a device (e.g., a mobile terminal) uses a relatively large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0276] One or more functional blocks and / or one or more combinations of functional blocks in the functional block diagrams set forth in the figures may be implemented with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any suitable combination thereof to perform the functions described herein. One or more functional blocks and / or one or more combinations of functional blocks in the functional block diagrams set forth in the figures may be implemented with, for example, a combination of computing devices, such as a combination of a DSP and a microprocessor, a combination of multiple microprocessors, one or more microprocessors in combination with a DSP communication, or any other configuration.

[0277] Although the present invention has been described above with reference to specific embodiments, the above description is merely illustrative and does not limit the scope of protection of the present invention. Various modifications and changes may be made to the present invention without departing from the spirit and principles of the present invention, and these modifications and changes are also within the scope of the present invention.

[0278] Furthermore, the following supplementary notes are disclosed regarding the embodiments including the above examples. (Appendix 1) A data receiving method applied to a terminal device, comprising: receiving first indication information, the first indication information indicating at least one set of transmission configuration indication states (TCI states); receiving second instruction information, the second instruction information instructing the terminal device to switch to at least one target cell; receiving third instruction information, for a target cell, the third instruction information indicating a transmission configuration instruction state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from a first transmission configuration instruction state (TCI state) set, the first transmission configuration instruction state (TCI state) set being one of the transmission configuration instruction state (TCI state) sets indicated by the first instruction information. (Appendix 2) The method of claim 1, wherein the target cell is one of at least one candidate cell configured for the terminal device, and the at least one candidate cell includes a serving cell and / or a non-serving cell. (Appendix 3) The first indication information indicates at least one set of transmission configuration indication states (TCI states), the first indication information indicates a transmission configuration indication state (TCI state) set for the terminal device; The first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of a serving cell; or The method of claim 1, wherein the first instruction information includes at least one of indicating a transmission configuration indication state (TCI state) set for one bandwidth portion (BWP) of a candidate cell. (Appendix 4) If the first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of the serving cell, When the unified TCI state type (unifiedTCI-StateType) configured for at least one candidate cell (candidate cell) is separate (separate), The method of Supplementary Note 3, wherein the first indication information indicates a downlink transmission configuration indication state (TCI state) set or a joint transmission configuration indication state (TCI state) for a downlink bandwidth portion (BWP) of a first serving cell, and indicates an uplink transmission configuration indication state (TCI state) set for an uplink bandwidth portion (BWP) of a second serving cell, and the first serving cell is the same as or different from the second serving cell. (Appendix 5) If the first indication information indicates a transmission configuration indication state (TCI state) set for the terminal device, When the unified TCI state type (unifiedTCI-StateType) configured for at least one candidate cell (candidate cell) is separate (separate), 4. The method of claim 3, wherein the first indication information indicates a downlink or joint TCI state set for the terminal device and an uplink TCI state set for the terminal device. (Appendix 6) If the first indication information indicates a transmission configuration indication state (TCI state) set for the terminal device, or if the first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of the serving cell, the transmission configuration indication state (TCI state) set includes at least one first transmission configuration indication state (TCI state) and at least one second transmission configuration indication state (TCI state), or the transmission configuration indication state (TCI state) set includes at least one second transmission configuration indication state (TCI state); The method described in Supplementary Note 3, wherein the first transmission configuration indication state (TCI state) is applied to the bandwidth portion (BWP) of the serving cell, and the second transmission configuration indication state (TCI state) is applied to the bandwidth portion (BWP) of a candidate cell. (Appendix 7) The method described in Supplementary Note 6, wherein the transmission configuration indication state (TCI state) set is indicated in serving cell configuration information. (Appendix 8) If the first indication information indicates a transmission configuration indication state (TCI state) set for one bandwidth portion (BWP) of the candidate cell, The method of claim 3, wherein the transmission configuration indication state (TCI state) set includes at least one third transmission configuration indication state (TCI state), and the third transmission configuration indication state (TCI state) is applied to the bandwidth portion (BWP) of the candidate cell. (Appendix 9) The method described in Supplementary Note 8, wherein the transmission configuration indication state (TCI state) set is indicated in candidate cell configuration information. (Appendix 10) If the first indication information indicates a transmission configuration indication state (TCI state) set for the terminal device, 4. The method of claim 3, wherein the first transmission configuration indication state (TCI state) set is the transmission configuration indication state (TCI state) set to be indicated. (Appendix 11) If the first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of the serving cell, The method described in Supplementary Note 3, wherein the first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of a serving cell, and the first transmission configuration indication state (TCI state) is the transmission configuration indication state (TCI state) set being indicated. (Appendix 12) If the first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of the serving cell, The second indication information further indicates a serving cell and a bandwidth portion (BWP) of the serving cell; The method described in Supplementary Note 3, wherein the first transmission configuration indication state (TCI state) set is a transmission configuration indication state (TCI state) set indicated for the bandwidth portion (BWP) of the serving cell indicated by the second indication information. (Appendix 13) If the first indication information indicates a transmission configuration indication state (TCI state) set for one bandwidth portion (BWP) of the candidate cell, The method described in Supplementary Note 3, wherein, for a target cell, the first transmission configuration indication state (TCI state) set is a transmission configuration indication state (TCI state) set indicated for a first bandwidth portion (BWP) of the target cell. (Appendix 14) The method described in Supplementary Note 1, wherein the target cell is determined based on a reference signal in a transmission configuration indication state (TCI state) indicated by the second indication information or the third indication information. (Appendix 15) The method described in Supplementary Note 1, wherein the first bandwidth portion (BWP) of the target cell is indicated by the second indication information or determined based on candidate cell configuration information. (Appendix 16) The method of Supplementary Note 1 further includes a step in which the terminal device applies a transmission configuration indication state (TCI state) indicated by the third indication information to a second bandwidth portion (BWP) of a second target cell, wherein the second target cell and the target cell are in a transmission configuration indication state (TCI state) update list, and a bandwidth portion index (BWP ID) of the second bandwidth portion (BWP) and a bandwidth portion index (BWP ID) of the first bandwidth portion (BWP) are identical. (Appendix 17) The method described in Supplementary Note 1 further includes a step in which, if the unified TCI state type (unifiedTCI-StateType) configured for the target cell is joint, the terminal device applies a transmission configuration indication state (TCI state) indicated by the third indication information to a downlink bandwidth portion (BWP) and an uplink bandwidth portion (BWP) of the target cell. (Appendix 18) The third indication information further includes a step of indicating a plurality of transmission configuration indication states (TCI states) for the first bandwidth portion (BWP) of the target cell, and the plurality of transmission configuration indication states (TCI states) are activated transmission configuration indication states (TCI states) for the first bandwidth portion (BWP) of the target cell; The method described in Supplementary Note 1, wherein a first transmission configuration indication state (TCI state) among the plurality of transmission configuration indication states (TCI states) is a transmission configuration indication state (TCI state) applied to the first bandwidth portion (BWP) of the target cell. (Appendix 19) The method described in Supplementary Note 1, wherein the first indication information is carried by RRC signaling, and / or the second indication information is carried by MAC CE, and / or the third indication information is carried by MAC CE or DCI. (Appendix 20) The second indication information and the third indication information are carried by one MAC CE, or The second indication information is carried by one MAC CE, and the third indication information is carried by another MAC CE, and the MAC CE carrying the second indication information and the MAC CE carrying the third indication information are carried by a PDSCH, or The method of claim 19, wherein the second indication information is carried by a MAC CE, the third indication information is carried by a DCI and at least one MAC CE, and the MAC CE carrying the second indication information and the MAC CE carrying the third indication information are carried by a PDSCH scheduled by the DCI. (Appendix 21) 21. The method of any of Supplementary Notes 1 to 20, wherein the TCI state is indicated by a TCI state identifier or a TCI state index. (Appendix 22) The TCI state set is a downlink or joint TCI state set, the TCI state is a downlink or joint TCI state, and the BWP is a downlink BWP, or 22. The method of any of Supplementary Notes 1 to 21, wherein the TCI state set is an uplink TCI state set, the TCI state is an uplink TCI state, and the BWP is an uplink BWP. (Appendix 23) A data receiving method applied to a terminal device, comprising: receiving fourth indication information, the fourth indication information indicating at least one transmission configuration indication state (TCI state) set; receiving fifth indication information, the fifth indication information indicating at least one transmission configuration indication state (TCI state) subset, and for a transmission configuration indication state (TCI state) set, the fifth indication information indicating a transmission configuration indication state (TCI state) subset in the transmission configuration indication state (TCI state) set; receiving sixth indication information, the sixth indication information instructing the terminal device to switch to at least one target cell, the target cell being one of candidate cells configured for the terminal device; receiving seventh instruction information, for a target cell, the seventh instruction information indicating a transmission configuration instruction state (TCI state) to be applied to a third bandwidth portion (BWP) of the target cell from a second transmission configuration instruction state (TCI state) set, the second transmission configuration instruction state (TCI state) set being one of the transmission configuration instruction state (TCI state) subsets indicated by the fifth instruction information. (Appendix 24) The method described in Supplementary Note 23, wherein if the TCI state subset indicated for the BWP of the target cell by the fifth instruction information includes a TCI state, the TCI state is the TCI state applied to the BWP of the target cell. (Appendix 25) A data transmission method applied to a network device, comprising: transmitting first indication information, the first indication information indicating at least one transmission configuration indication state (TCI state) set; transmitting second instruction information, wherein the second instruction information instructs the terminal device to switch to at least one target cell; and transmitting third instruction information, for a target cell, the third instruction information indicating a transmission configuration indication state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from a first transmission configuration indication state (TCI state) set, the first transmission configuration indication state (TCI state) set being one of the transmission configuration indication state (TCI state) sets indicated by the first instruction information. (Appendix 26) A data transmission method applied to a network device, comprising: transmitting fourth indication information, the fourth indication information indicating at least one transmission configuration indication state (TCI state) set; transmitting fifth indication information, the fifth indication information indicating at least one transmission configuration indication state (TCI state) subset, and for a transmission configuration indication state (TCI state) set, the fifth indication information indicating a transmission configuration indication state (TCI state) subset in the transmission configuration indication state (TCI state) set; transmitting sixth instruction information, the sixth instruction information instructing the terminal device to switch to at least one target cell, the target cell being one of candidate cells configured for the terminal device; and transmitting seventh instruction information, for a target cell, the seventh instruction information indicating a transmission configuration instruction state (TCI state) to be applied to a third bandwidth portion (BWP) of the target cell from a second transmission configuration instruction state (TCI state) set, the second transmission configuration instruction state (TCI state) set being one of the transmission configuration instruction state (TCI state) subsets indicated by the fifth instruction information. (Appendix 27) A terminal device comprising: a memory in which a computer program is stored; and a processor, wherein the processor is configured to execute the computer program to realize the data reception method described in any one of Supplementary Notes 1 to 24. (Appendix 28) A network device comprising: a memory having a computer program stored therein; and a processor, the processor configured to execute the computer program to implement the data transmission method of any one of appendices 25 to 26. (Appendix 29) A communication system including a terminal device and a network device, the terminal device receives first instruction information, the first instruction information indicating at least one transmission configuration indication state (TCI state) set; receives second instruction information, the second instruction information indicating that the terminal device switches to at least one target cell; receives third instruction information, for the target cell, the third instruction information indicating a transmission configuration indication state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from a first transmission configuration indication state (TCI state) set, the first transmission configuration indication state (TCI state) set being one of the transmission configuration indication state (TCI state) sets indicated by the first instruction information; The network device transmits the first instruction information, the second instruction information, and the third instruction information. (Appendix 30) A communication system including a terminal device and a network device, The terminal device receives fourth instruction information, the fourth instruction information indicating at least one transmission configuration indication state (TCI state) set; fifth instruction information, the fifth instruction information indicating at least one transmission configuration indication state (TCI state) subset, for a transmission configuration indication state (TCI state) set, the fifth instruction information indicating a transmission configuration indication state (TCI state) subset in the transmission configuration indication state (TCI state) set; receives sixth instruction information, the sixth instruction information indicating that the terminal device switches to at least one target cell, the target cell being one of candidate cells configured for the terminal device; and receives seventh instruction information, for the target cell, the seventh instruction information indicating a transmission configuration indication state (TCI state) to be applied to a third bandwidth portion (BWP) of the target cell from a second transmission configuration indication state (TCI state) set; the set of transmission configuration indication states (TCI states) is one of the subsets of transmission configuration indication states (TCI states) indicated by the fifth indication information; A communication system, wherein the network device transmits the fourth instruction information, the fifth instruction information, the sixth instruction information, and the seventh instruction information.

Claims

1. A data receiving device configured in a terminal device, a first receiver for receiving first indication information, the first indication information indicating at least one transmission configuration indication state (TCI state) set; a second receiving unit configured to receive second instruction information, the second instruction information instructing the terminal device to switch to at least one target cell; a third receiver configured to receive third instruction information, wherein for a target cell, the third instruction information indicates a transmission configuration instruction state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from a first set of transmission configuration instruction states (TCI state), the first set of transmission configuration instruction states (TCI state) being one of the sets of transmission configuration instruction states (TCI state) indicated by the first instruction information.

2. 2. The apparatus of claim 1, wherein the target cell is one of at least one candidate cell configured for the terminal device, the at least one candidate cell including a serving cell and / or a non-serving cell.

3. The first indication information indicates at least one transmission configuration indication state (TCI state) set, the first indication information indicating a transmission configuration indication state (TCI state) set for the terminal device; The first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of a serving cell; or 2. The apparatus of claim 1, wherein the first indication information includes at least one of indicating a transmission configuration indication state (TCI state) set for one bandwidth portion (BWP) of a candidate cell.

4. If the first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of the serving cell, When the unified TCI-StateType configured for at least one candidate cell is separate, 4. The apparatus of claim 3, wherein the first indication information indicates a downlink transmission configuration indication state (TCI state) set or a joint transmission configuration indication state (TCI state) for a downlink bandwidth portion (BWP) of a first serving cell and indicates an uplink transmission configuration indication state (TCI state) set for an uplink bandwidth portion (BWP) of a second serving cell, and the first serving cell is the same as or different from the second serving cell.

5. If the first indication information indicates a transmission configuration indication state (TCI state) set for the terminal device, or if the first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of the serving cell, The transmission configuration indication state (TCI state) set includes at least one first transmission configuration indication state (TCI state) and at least one second transmission configuration indication state (TCI state), or the transmission configuration indication state (TCI state) set includes at least one second transmission configuration indication state (TCI state); 4. The apparatus of claim 3, wherein the first transmission configuration indication state (TCI state) applies to the bandwidth portion (BWP) of the serving cell, and the second transmission configuration indication state (TCI state) applies to the bandwidth portion (BWP) of a candidate cell.

6. The apparatus of claim 5 , wherein the transmission configuration indication state (TCI state) set is indicated in serving cell configuration information.

7. If the first indication information indicates a transmission configuration indication state (TCI state) set for one bandwidth portion (BWP) of the candidate cell, 4. The apparatus of claim 3, wherein the set of transmission configuration indication states (TCI states) includes at least one third transmission configuration indication state (TCI state), and the third transmission configuration indication state (TCI state) is applied to the bandwidth portion (BWP) of the candidate cell.

8. The apparatus of claim 7 , wherein the transmission configuration indication state (TCI state) set is indicated in candidate cell configuration information.

9. If the first indication information indicates a transmission configuration indication state (TCI state) set for the terminal device, 4. The apparatus of claim 3, wherein the first set of transmission configuration indication states (TCI states) is the set of transmission configuration indication states (TCI states) that is indicated.

10. If the first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of the serving cell, 4. The apparatus of claim 3, wherein the first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of a serving cell, and the first transmission configuration indication state (TCI state) is the indicated transmission configuration indication state (TCI state) set.

11. If the first indication information indicates a transmission configuration indication state (TCI state) set for a bandwidth portion (BWP) of the serving cell, The second indication information further indicates a serving cell and a bandwidth portion (BWP) of the serving cell; 4. The device according to claim 3, wherein the first transmission configuration indication state (TCI state) set is a transmission configuration indication state (TCI state) set indicated for the bandwidth portion (BWP) of the serving cell indicated by the second indication information.

12. If the first indication information indicates a transmission configuration indication state (TCI state) set for one bandwidth portion (BWP) of the candidate cell, 4. The apparatus of claim 3, wherein, for a target cell, the first set of transmission configuration indication states (TCI states) is a set of transmission configuration indication states (TCI states) indicated for a first bandwidth portion (BWP) of the target cell.

13. The device according to claim 1 , wherein the target cell is determined based on a reference signal in a transmission configuration indication state (TCI state) indicated by the second indication information or indicated by the third indication information.

14. 2. The apparatus of claim 1, wherein the first bandwidth portion (BWP) of the target cell is indicated by the second indication information or is determined based on candidate cell configuration information.

15. 2. The apparatus of claim 1, further comprising: a first applying unit that applies a transmission configuration indication state (TCI state) indicated by the third indication information to a second bandwidth portion (BWP) of a second target cell, wherein the second target cell and the target cell are in a transmission configuration indication state (TCI state) update list, and a bandwidth portion index (BWP ID) of the second bandwidth portion (BWP) and a bandwidth portion index (BWP ID) of the first bandwidth portion (BWP) are identical.

16. 2. The apparatus of claim 1, further comprising: a second applying unit that applies a transmission configuration indication state (TCI state) indicated by the third indication information to a downlink bandwidth portion (BWP) and an uplink bandwidth portion (BWP) of the target cell when a unified TCI state type (unifiedTCI-StateType) configured for the target cell is joint.

17. the third indication information indicates a plurality of transmission configuration indication states (TCI states) for the first bandwidth portion (BWP) of the target cell, the plurality of transmission configuration indication states (TCI states) being activated for the first bandwidth portion (BWP) of the target cell; and 2. The apparatus of claim 1, wherein a first transmission configuration indication state (TCI state) of the plurality of transmission configuration indication states (TCI states) is a transmission configuration indication state (TCI state) that applies to the first bandwidth portion (BWP) of the target cell.

18. A data receiving device configured in a terminal device, a fourth receiver for receiving fourth indication information, the fourth indication information indicating at least one transmission configuration indication state (TCI state) set; a fifth receiving unit that receives fifth indication information, the fifth indication information indicating at least one transmission configuration indication state (TCI state) subset, and for a transmission configuration indication state (TCI state) set, the fifth indication information indicating a transmission configuration indication state (TCI state) subset in the transmission configuration indication state (TCI state) set; a sixth receiving unit configured to receive sixth instruction information, the sixth instruction information instructing the terminal device to switch to at least one target cell, the target cell being one of candidate cells configured for the terminal device; and a seventh receiver configured to receive seventh indication information, wherein for a target cell, the seventh indication information indicates a transmission configuration indication state (TCI state) to be applied to a third bandwidth portion (BWP) of the target cell from a second set of transmission configuration indication states (TCI state), the second set of transmission configuration indication states (TCI state) being one of a subset of transmission configuration indication states (TCI state) indicated by the fifth indication information.

19. A data transmission device configured in a network device, a first transmitter configured to transmit first indication information, the first indication information indicating at least one transmission configuration indication state (TCI state) set; a second transmitter configured to transmit second instruction information, the second instruction information instructing the terminal device to switch to at least one target cell; a third transmitter configured to transmit third instruction information, wherein for a target cell, the third instruction information indicates a transmission configuration indication state (TCI state) to be applied to a first bandwidth portion (BWP) of the target cell from a first transmission configuration indication state (TCI state) set, the first transmission configuration indication state (TCI state) set being one of the transmission configuration indication state (TCI state) sets indicated by the first instruction information.

20. A data transmission device configured in a network device, a fourth transmitter configured to transmit fourth indication information, the fourth indication information indicating at least one transmission configuration indication state (TCI state) set; a fifth transmitter configured to transmit fifth indication information, the fifth indication information indicating at least one transmission configuration indication state (TCI state) subset, and for a transmission configuration indication state (TCI state) set, the fifth indication information indicating a transmission configuration indication state (TCI state) subset in the transmission configuration indication state (TCI state) set; a sixth transmitter configured to transmit sixth instruction information, the sixth instruction information instructing a terminal device to switch to at least one target cell, the target cell being one of candidate cells configured for the terminal device; and a seventh transmitter configured to transmit seventh indication information, wherein for a target cell, the seventh indication information indicates a transmission configuration indication state (TCI state) to be applied to a third bandwidth portion (BWP) of the target cell from a second transmission configuration indication state (TCI state) set, the second transmission configuration indication state (TCI state) set being one of a transmission configuration indication state (TCI state) subset indicated by the fifth indication information.

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