Cell handover method and apparatus, user equipment, and storage medium

Abstract

The application discloses a cell switching method and device, user equipment and storage medium, and belongs to the technical field of communication. The cell switching method of the application comprises the following steps: a UE performs switching of a transmission mode on a target cell according to target indication information; wherein the target indication information is used for indicating a target unified TCI state, and the target cell comprises at least one of the following: a first cell corresponding to the UE and a second cell corresponding to the UE.

Description

Technical Field

[0001] This application belongs to the field of communication technology, and specifically relates to a cell handover method, apparatus, user equipment, and storage medium. Background Technology

[0002] To improve beam management efficiency, a Transmission Configuration Indication (TCI) mechanism was introduced. In carrier aggregation (CA) scenarios, multiple component carriers (CCs) can share a unified TCI state pool. During cell handover, the network-side equipment needs to send RRC reconfiguration signaling to instruct the UE to handover, which results in long handover delays and poor flexibility. Summary of the Invention

[0003] This application provides a cell handover method, apparatus, user equipment, and storage medium, which can solve the problems of long cell handover latency and poor flexibility in CA scenarios.

[0004] Firstly, a cell handover method is provided, which includes: a UE performing a transmission mode switch on a target cell according to target indication information; wherein the target indication information is used to indicate the target unified TCI status, and the target cell includes at least one of the following: a first cell corresponding to the UE and a second cell corresponding to the UE.

[0005] Secondly, a cell handover apparatus is provided, comprising: an execution module. The execution module is configured to perform a transmission mode switch on a target cell according to target indication information; wherein the target indication information indicates the target unified TCI status, and the target cell includes at least one of the following: a first cell corresponding to the UE and a second cell corresponding to the UE.

[0006] Thirdly, a UE is provided, the UE including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0007] Fourthly, a UE is provided, including a processor and a communication interface, wherein the processor is used to perform a transmission mode switch on a target cell according to target indication information; wherein the target indication information is used to indicate the target unified TCI status, and the target cell includes at least one of the following: a first cell corresponding to the UE and a second cell corresponding to the UE.

[0008] Fifthly, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect.

[0009] In a sixth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being used to run programs or instructions to implement the method as described in the first aspect.

[0010] In a seventh aspect, a computer program / program product is provided, the computer program / program product being stored in a non-transient storage medium, the program / program product being executed by at least one processor to implement the steps of the cell handover method as described in the first aspect.

[0011] In this embodiment, the UE performs a transmission mode switch on the target cell based on target indication information. This target indication information indicates the target unified TCI status, and the target cell includes the first cell and / or the second cell corresponding to the UE. In this solution, under CA scenarios, the UE can switch the transmission mode on the target cell based on the target unified TCI status indication information to achieve fast cell handover. Compared to the traditional method of explicitly sending RRC reconfiguration signaling to notify the UE to perform cell handover, this improves system flexibility, reduces cell handover latency, and enhances the flexibility of cell handover. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the architecture of a communication system provided in an embodiment of this application;

[0013] Figure 2 This is a schematic diagram of a cell handover method provided in an embodiment of this application;

[0014] Figure 3 This is a schematic diagram of the structure of a cell handover device provided in an embodiment of this application;

[0015] Figure 4 This is a schematic diagram of the hardware structure of a communication device provided in an embodiment of this application;

[0016] Figure 5 This is a schematic diagram of the hardware structure of a UE provided in an embodiment of this application. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0018] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0019] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-Carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used in the systems and radio technologies mentioned above, as well as in other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and NR terminology is used in most of the following description; however, these technologies can also be applied to applications beyond NR systems, such as 6th Generation (6G) communication systems.

[0020] Figure 1This diagram illustrates the architecture of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a UE 11 and a network-side device 12. The UE 11 can also be referred to as a terminal device or terminal. The UE 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), etc. Wearable devices include smartwatches, wristbands, headphones, glasses, etc. It should be noted that the specific type of UE 11 is not limited in this embodiment. Network-side device 12 can be a base station or a core network. The base station can be referred to as a node B, evolved node B, access point, base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), B node, evolved B node (eNB), home B node, home evolved B node, WLAN access point, WiFi node, transmitting and receiving point (TRP), or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that in this application embodiment, only the base station in the NR system is used as an example, but the specific type of base station is not limited.

[0021] The following explains some concepts and / or terms involved in the cell handover method, apparatus, user equipment, and storage medium provided in the embodiments of this application.

[0022] 1. Regarding beam measurement and beam reporting

[0023] Analog beamforming is transmitted across the full bandwidth, and each polarization element on the panel of each high-frequency antenna array can only transmit an analog beam in a time-division multiplexed manner. The beamforming weights of the analog beam are achieved by adjusting the parameters of devices such as the RF front-end phase shifter.

[0024] Currently, a polling method is typically used to train simulated beamforming vectors. Each element on each antenna panel, in each polarization direction, sequentially transmits training signals (i.e., candidate beamforming vectors) at predetermined times using time-division multiplexing. The terminal then measures these signals and sends back a beam report, which the network uses to implement simulated beam transmission in the next transmission. The beam report typically includes the identifiers of several optimal transmit beams and the measured received power of each transmit beam.

[0025] When performing beam measurements, the network configures a reference signal resource set (RS resource set), which includes at least one reference signal resource, such as an SSB resource or a CSI-RS resource. The UE measures the L1-RSRP / L1-SINR for each RS resource and reports at least one optimal measurement result to the network. The reported information includes the SSBRI or CRI and the L1-RSRP / L1-SINR. This report reflects at least one optimal beam and its quality, allowing the network to determine the beam used to transmit channels or signals to the UE.

[0026] 2. Regarding the beam indication mechanism

[0027] After beam measurement and beam reporting, the network can perform beam indication on the downlink and uplink channels or reference signals to establish beam links between the network and the UE, and realize the transmission of channels or reference signals.

[0028] For PDCCH beam indication, the network uses RRC signaling to configure K TCI (Transmission Configuration Indication) states for each CORESET. When K > 1, one TCI state is indicated or activated by MAC CE; when K = 1, no additional MAC CE command is required. When the UE is listening to the PDCCH, it uses the same QCL (Quasi-colocation), i.e., the same TCI state, for all search spaces within the CORESET. The reference signal in this TCI state (e.g., periodic CSI-RS resource, semi-persistent CSI-RS resource, SS block, etc.) has the same spatial QCL as the UE-specific PDCCH DMRS port. The UE can determine which receive beam to use to receive the PDCCH based on this TCI state.

[0029] For PDSCH beam indication, the network configures M TCI states via RRC signaling, activates 2N TCI states using MAC CE commands, and then notifies the TCI state via the N-bit TCI field of the DCI. The reference signal in this TCI state is QCL with the DMRS port of the PDSCH to be scheduled. The UE can then determine which receive beam to use to receive the PDSCH based on this TCI state.

[0030] For CSI-RS beam indication, when the CSI-RS type is periodic CSI-RS, the network configures QCL information for the CSI-RS resource via RRC signaling. When the CSI-RS type is semi-persistent CSI-RS, the network indicates its QCL information when activating a CSI-RS resource from the RRC-configured CSI-RS resource set via MAC CE command. When the CSI-RS type is aperiodic CSI-RS, the network configures the QCL for the CSI-RS resource via RRC signaling and uses DCI to trigger the CSI-RS.

[0031] For PUCCH beam indication, the network uses RRC signaling to configure spatial relation information for each PUCCH resource via the parameter PUCCH-SpatialRelationInfo. When multiple spatial relation information items are configured for a PUCCH resource, MAC-CE is used to indicate or activate one of the spatial relation information items. When only one spatial relation information item is configured for a PUCCH resource, no additional MAC-CE command is required.

[0032] For PUSCH beam indication, the spatial relation information of PUSCH is determined by each SRI codepoint in the SRI field of the DCI when the PDCCH carries the DCI to schedule PUSCH. This SRI is used to indicate the spatial relation information of PUSCH.

[0033] For SRS beam indication, when the SRS type is periodic SRS, the network configures spatial relation information for the SRS resource via RRC signaling. When the SRS type is semi-persistent SRS, the network activates one from a set of spatial relation information configured by RRC via MAC CE command. When the SRS type is aperiodic SRS, the network configures spatial relation information for the SRS resource via RRC signaling.

[0034] It should be noted that the terms beam information, spatial relation information, spatial domain transmission filter information, spatial filter information, TCI state information, QCL information, QCL parameters, and spatial relation information mentioned above are approximately synonymous. Downlink beam information is typically represented using TCI state information and QCL information. Uplink beam information is typically represented using spatial relation information.

[0035] 3. Unified TCI framework

[0036] To improve beam management efficiency and reduce beam update latency, a unified TCI framework design has been introduced. Currently, there are two schemes: joint TCI and separate TCI. Joint TCI uses a single beam for both uplink and downlink. When the DCI indicates a TCI state, that TCI state is applied to all uplink and downlink channels and / or signals. Separate TCI uses a pair of beams, i.e., two TCI states, one applied to all downlink channels or signals, and the other applied to all uplink channels or signals.

[0037] For intra-band CA cases, it has been agreed that multiple CCs can share a unified TCI state pool. The sharing methods include the following two:

[0038] Define a reference BWP / CC, and use the QCL Type resource RS corresponding to the unified TCI state indicated by DCI in the reference BWP / CC as the unified TCI state for all CCs or BWPs.

[0039] The RS on each BWP / CC corresponding to the QCL Type Resource ID in the unified TCI status indicated by DCI is used as the unified TCI status on their respective BWP / CC.

[0040] 4. RRM Measurement

[0041] In existing RRM measurements, the UE measures the reference signal of neighboring cells to determine whether to perform a cell handover. To avoid short-term fluctuations in measurement results, a series of uniformly distributed measurement samples are typically averaged over the measurement period; this is known as high-level (e.g., Layer 3: L3) measurement. L3 measurement is obtained by applying L3 filtering to the L1 measurement results.

[0042] When measuring the Reference Signal (SSB) of a neighboring cell, a measurement window needs to be set to measure the SSB at regular intervals. This requires configuring a SMTC (Segment Management Controller) to avoid unnecessary measurements and reduce energy consumption. The SMTC window period can be set to the same as the SSB period, such as 5 / 10 / 20 / 40 / 80 / 160ms, etc., and the measurement time interval can be set to 1 / 2 / 3 / 4 / 5ms, etc., depending on the number of SSBs transmitted. The UE measures the SSB according to the SMTC configuration information and then reports the measurement results to the gNB (gNB) or performs cell selection.

[0043] SMTC stands for Synchronization Signal / Physical Broadcast Channel Block Measurement Timing Configuration (SS / PBCH).

[0044] 5. Rate matching

[0045] When L1 measures the SSB of this cell, there is a rate matching mechanism, which means that PDSCH cannot be transmitted on the PRB of the SSB.

[0046] In non-CA mobile scenarios, the time-frequency domain locations of SSBs differ on different CCs. Therefore, the rate matching pattern is determined based on the SSB resource allocation on different CCs, as follows:

[0047] If the PDSCH comes from resource CC, then use the rate matching mode on resource CC;

[0048] If the PDSCH comes from the target CC, then the rate matching mode on the target CC is used.

[0049] The cell handover method provided in this application will be described in detail below with reference to the accompanying drawings, through some embodiments and application scenarios.

[0050] Currently, the network side needs to explicitly send RRC reconfiguration signaling to indicate the UE handover, which has a long latency and is not flexible enough. Furthermore, in CA scenarios where multiple CCs share a unified TCI state pool, Layer 1 (L1) beam handover suffers from cell handover state confusion and rate mismatch issues. Current L1-based cell handover and rate matching in CA scenarios are not conducive to mobility management, including cell handover and inter-cell multi-TRP.

[0051] This application provides a method for L1-based cell handover and rate matching mode handover in a CA scenario. Compared with the traditional method of explicitly sending RRC reconfiguration signaling to notify the UE to perform cell handover, this method improves the flexibility of the system and reduces cell handover latency.

[0052] This application provides a cell handover method. Figure 2 A flowchart illustrating a cell handover method provided in an embodiment of this application is shown. Figure 2 As shown, the cell handover method provided in this application embodiment may include the following steps 201 and 202.

[0053] Step 201: The UE obtains target indication information.

[0054] Step 202: The UE performs a transmission mode switch for the target cell according to the target indication information.

[0055] In this embodiment of the application, the target indication information is used to indicate the target unified TCI status, and the target cell includes at least one of the following: the first cell corresponding to the UE and the second cell corresponding to the UE.

[0056] It should be noted that the cell handover method provided in this application embodiment, that is, the handover method applied in CA scenario, is also applicable to TRP handover between cells, that is, replacing the first cell and the second cell with the first TRP and the second TRP.

[0057] In this embodiment of the application, the UE can determine the unified TCI status of the target cell based on the target unified TCI status information (e.g., the target unified TCI status identifier) ​​included in the target indication information, and determine the cell where PCI handover has occurred based on the unified TCI status of the target cell, so as to perform a handover of the transmission mode on the cell where PCI handover has occurred.

[0058] Optionally, in the embodiments of this application, the aforementioned target indication information may be sent by the network-side device, or may be agreed upon by the protocol, or may be pre-configured, or may be determined by the UE itself.

[0059] Optionally, in this embodiment of the application, the first cell is the primary cell and the second cell is the secondary cell.

[0060] Optionally, in the embodiments of this application, the above transmission method includes at least one of the following: unified TCI status and rate matching mode.

[0061] Optionally, in the embodiments of this application, the target indication information mentioned above is any one of the following: DCI, MAC CE signaling, or RRC signaling.

[0062] Optionally, in this embodiment of the application, the target indication information is also used to indicate the source cell or source TRP corresponding to the unified TCI state.

[0063] Optionally, in this embodiment of the application, the aforementioned unified TCI state is a unified TCI state in a unified TCI state pool; the unified TCI state pool is a unified TCI state pool shared by the first information in the third cell.

[0064] Optionally, in this embodiment of the application, the third cell includes at least one of the following: a first cell, a second cell, all cells in the carrier unit (CC) list configured by the network, neighboring cells of the first cell, neighboring cells of the second cell, and neighboring cells of all cells in the CC list configured by the network.

[0065] Optionally, in the embodiments of this application, the first information mentioned above includes at least one of the following: reference signal RS, control channel, and data channel.

[0066] Optionally, in the embodiments of this application, step 202 above can be specifically implemented by steps 202a to 202c below.

[0067] Step 202a: The UE determines the first unified TCI state of the target cell based on the target indication information.

[0068] Optionally, in the embodiments of this application, the above step 202a can be implemented by the following steps 202a1 and 202a2.

[0069] Step 202a1: The UE determines the RS identifier of a QCL type resource in the target unified TCI state as the target RS identifier according to the first preset rule.

[0070] Step 202a2: The UE determines the first RS as the first unified TCI state of the target cell.

[0071] In this embodiment of the application, the first RS mentioned above is the RS in the target cell that corresponds to the target RS identifier.

[0072] It should be noted that the quasi-co-located source reference signal corresponding to the first unified TCI state of the target cell is the RS corresponding to the target RS identifier in the target cell. The first unified TCI state of the target cell can be understood as a candidate unified TCI state, which has not yet been used for data reception.

[0073] Step 202b: The UE determines the cell where PCI handover will occur based on the first unified TCI status of the target cell.

[0074] Optionally, in the embodiments of this application, step 202b can be implemented by step 202b1 or step 202b2 as described below.

[0075] Step 202b1: If the target cell includes the fourth cell and the first unified TCI state of the fourth cell meets the first condition, the UE determines that the fourth cell is the cell where the PCI handover will occur, and the fourth cell is either the first cell or the second cell.

[0076] Step 202b2: If the target cell includes the first cell and the second cell, and the first joint TCI state of the fifth cell in the target cell meets the first condition, the UE determines the fifth cell as the cell where PCI handover will occur. The fifth cell includes at least one of the following: the first cell and the second cell.

[0077] In this embodiment of the application, the first condition mentioned above is any one of the following:

[0078] The first RS corresponding to the first unified TCI state of the target cell belongs to the neighboring cells of the target cell;

[0079] The first unified TCI state of the target cell corresponds to the quasi-co-located QCL resource RS of the first RS and the neighboring cells of the target cell;

[0080] The first unified TCI state of the target cell carries an indication of the PCI of the target cell's neighboring cells, or the neighboring cell association information of the target cell.

[0081] The first unified TCI state of the target cell corresponds to the TCI state of the first RS, which carries an indication of the PCI of the target cell's neighboring cells or the neighboring cell association information of the target cell.

[0082] It should be noted that, when performing step 202b1 above, the first condition mentioned above specifically refers to any one of the following:

[0083] The first RS corresponding to the first unified TCI state of the fourth cell belongs to the neighboring cell of the fourth cell;

[0084] The first unified TCI state of the fourth cell corresponds to the quasi-co-located QCL resource RS of the first RS of the fourth cell;

[0085] The first unified TCI state of the fourth cell carries an indication of the PCI of the fourth cell's neighboring cells, or the neighboring cell association information of the fourth cell.

[0086] The first unified TCI state of the fourth cell corresponds to the TCI state of the first RS, which carries an indication of the PCI of the fourth cell's neighboring cells or the neighboring cell association information of the fourth cell.

[0087] It should be noted that, when performing step 202b2 above, the first condition mentioned above specifically refers to any one of the following:

[0088] The first RS corresponding to the first unified TCI state of the fifth cell belongs to the neighboring cell of the fifth cell;

[0089] The first unified TCI state of the fifth cell corresponds to the quasi-co-located QCL resource RS of the first RS and the neighboring cells of the fifth cell;

[0090] The first unified TCI state of the fifth cell carries an indication of the PCI of the fifth cell's neighboring cells, or the association information of the fifth cell's neighboring cells.

[0091] The first unified TCI state of the fifth cell corresponds to the TCI state of the first RS, which carries an indication of the PCI of the neighboring cells of the fifth cell, or the neighboring cell association information of the fifth cell.

[0092] Optionally, in this embodiment of the application, the indication of the neighbor cell association information is used to determine the neighbor cell association information; the neighbor cell association information includes at least one of the following: the period of the neighbor cell RS, the time domain location of the neighbor cell RS, the transmission power of the neighbor cell RS, and the PCI of the neighbor cell.

[0093] Step 202c: The UE performs a transmission mode switch for the cell where PCI handover has occurred.

[0094] Optionally, in the embodiments of this application, the above step 202c can be specifically implemented by the following step 202c1.

[0095] Step 202c1: If the third condition is met, the UE determines the second unified TCI state of the target cell as the first unified TCI state of the target cell.

[0096] In this embodiment of the application, the third condition includes at least one of the following:

[0097] The first RS corresponding to the first unified TCI state of the target cell and the RS corresponding to the unified TCI state of other cells besides the target cell belong to different cells;

[0098] The PCI carried in the first unified TCI state of the target cell is different from the PCI carried in the unified TCI state of other cells besides the target cell;

[0099] The PCI or neighbor cell related information carried by the TCI state of the first RS corresponding to the first unified TCI state of the target cell is different from the PCI or neighbor cell related information carried by the TCI state of the RS corresponding to the unified TCI state of other cells besides the target cell.

[0100] It should be noted that the second unified TCI state of the target cell can be understood as a unified TCI state that will be used for data reception or has already been used for data reception.

[0101] In addition, when the target cell determines that no PCI handover has occurred based on the first unified TCI state of the target cell indicated by the target unified TCI state, the UE can determine or update the second unified TCI state of the target cell to the first unified TCI state of the target cell.

[0102] Optionally, in this embodiment of the application, the second unified TCI state of the target cell is any one of the following:

[0103] Unified TCI status of some channels and / or RS in the target cell;

[0104] The unified TCI status of all channels and / or RSs in the target cell.

[0105] Optionally, in this embodiment of the application, step 202c can be implemented by step 202c2 as described below.

[0106] Step 202c2: If the first unified TCI state of the target cell meets the third condition, the UE performs a rate matching mode handover for the cell where the PCI handover occurs.

[0107] It should be noted that, for scenarios involving carrier aggregation or multiple TRPs between cells, when a PCI handover occurs in the primary cell but not in the secondary cell, the rate matching mode of the secondary cell changes according to the handover of the rate matching mode of the primary cell.

[0108] Optionally, in this embodiment of the application, the first cell and the second cell are respectively configured with multiple rate matching modes;

[0109] Multiple rate matching modes are associated with multiple PCIs, with each rate matching mode corresponding to one PCI.

[0110] Multiple rate matching modes are associated with the RS configuration information of multiple neighboring cells.

[0111] Optionally, in this embodiment of the application, the rate matching mode of the target cell is determined by a second preset rule;

[0112] The second preset rule is at least one of the following:

[0113] The PCI rate matching mode before the association switch;

[0114] The rate matching mode of PCI after association switching;

[0115] Rate matching mode determined based on data scheduling of other cells besides the target cell.

[0116] Optionally, in the embodiments of this application, step 202c above can be specifically implemented by step 202c3 below.

[0117] Step 202c3: If the fourth condition is met, the UE falls back to the single-carrier scheduling state, determines the serving cell according to the third preset rule, deactivates other cells in the CC list, and determines the second unified TCI state of the serving cell as the first unified TCI state of the serving cell.

[0118] In this embodiment of the application, the serving cell is either the first cell or the second cell.

[0119] The fourth condition includes at least one of the following:

[0120] The first RS corresponding to the first unified TCI state of the target cell belongs to the same cell as the RS corresponding to the unified TCI state of at least one other cell besides the target cell.

[0121] The PCI carried by the first unified TCI state of the target cell is the same as the PCI carried by the unified TCI state of at least one other cell besides the target cell.

[0122] Optionally, in this embodiment of the application, the second unified TCI state of the serving cell is any one of the following:

[0123] Unified TCI status of certain channels and / or RSs in the serving cell;

[0124] The unified TCI status of all channels and / or RSs in the serving cell.

[0125] Optionally, in this embodiment of the application, the rate matching mode of the above-mentioned serving cell is determined by the Physical Downlink Shared Channel (PDSCH) scheduling and transmission associated PCI;

[0126] The PDSCH scheduling and transmission are associated with the pre-handover PCI of the serving cell, and the rate matching mode is determined based on the RS resource configuration associated with the pre-handover PCI.

[0127] The rate matching mode of the PCI corresponding to the PDSCH scheduling and transmission associated serving cell after handover is determined based on the RS resource configuration associated with the PCI after handover.

[0128] The cell handover method provided in this application embodiment will be described below through a specific process.

[0129] In this embodiment of the application, under the CA scenario, based on L1 cell handover, the UE can switch transmission modes according to the indication information (i.e., target indication information) from the network side. The specific process is as follows:

[0130] The UE receives indication information from the network side in the first cell. This indication information is used to indicate the PCI handover between the first cell and / or the second cell, as well as the transmission mode after the PCI handover.

[0131] Optionally, in this embodiment of the application, the above-mentioned indication information may be signaling information carrying an indication of the unified TCI state.

[0132] Optionally, in the embodiments of this application, the above signaling information may be DCI, MAC CE, or RRC, etc.

[0133] Optionally, in this embodiment of the application, the signaling information may further include an indication of the source cell / TRP corresponding to the unified TCI state, such as the source cell's PCI, bit mapping indication, or control resource set pool index (CORESET Poolindex). It should be noted that this scheme can be applied to scenarios where the unified TCI state is indicated across carriers.

[0134] Optionally, in this embodiment, PCI handover refers to the conversion of some or all of the data received by the UE from being transmitted by the source cell / TRP to being transmitted by the target cell / TRP. Specifically, it can be understood that the unified TCI state of all or part of the data channels or control channels is determined according to the indication of the unified TCI state in the indication information, and the RS directly or indirectly associated with the unified TCI state belongs to the neighboring cell.

[0135] Optionally, in the embodiments of this application, the transmission method after PCI switching includes at least one of the following:

[0136] Unified TCI status on the first and / or second cell;

[0137] Rate matching mode on the first cell and / or the second cell (rate matching mode).

[0138] Optionally, in this embodiment of the application, the first cell can be a primary cell or a secondary cell.

[0139] Optionally, in this embodiment of the application, the unified TCI state is a unified TCI state in the unified TCI state pool.

[0140] Optionally, in the embodiments of this application, the unified TCI status includes at least one of the following:

[0141] QCL Type A resource RS ID;

[0142] QCL Type B resource RS ID;

[0143] QCL Type C resource RS ID;

[0144] QCL Type D resource RS ID.

[0145] Optionally, in this embodiment of the application, the first information in the third cell can share a unified TCI state pool, that is, the unified TCI state of the first information in the third cell all comes from the same unified TCI state pool.

[0146] Optionally, in the embodiments of this application, the first information mentioned above is at least one of RS, control channel or data channel.

[0147] Optionally, in the embodiments of this application, the first information mentioned above may correspond to one or more unified TCI states. For example, for data transmission channels (PDCCH, PDSCH, PUCCH, PUSCH), the unified TCI states of all uplink and / or downlink channels are the same; for RS, the concept of unified TCI may not be followed, that is, different uplink and / or downlink RS may correspond to different TCI states.

[0148] Optionally, in this embodiment of the application, the third cell may include at least one of the following:

[0149] First residential area;

[0150] Second residential area;

[0151] All cells in the CC list of the network configuration;

[0152] The neighboring communities of the first community;

[0153] The neighboring communities of the second community;

[0154] The neighboring cells of all cells in the CC list of the network configuration.

[0155] In this embodiment of the application, after the UE determines that the indication information is the first indication information, it performs PCI handover.

[0156] Optionally, in this embodiment of the application, the first indication information mentioned above is a neighboring cell of the fourth cell whose unified TCI status is carried in the signaling information.

[0157] Optionally, in this embodiment of the application, the fourth cell is either the first cell or the second cell.

[0158] Optionally, in this embodiment of the application, the UE determines that the unified TCI state belongs to the neighboring cell of the fourth cell if any of the following conditions are met:

[0159] In the unified TCI status, at least one QCL type RS ID or all QCL type RS IDs indicate that the RS in the fourth cell belongs to the neighboring cell of the fourth cell;

[0160] Alternatively, in the unified TCI status, the QCL resource RS of the RS in the fourth cell indicated by at least one QCL type RS ID or all QCL type RS IDs belongs to the neighboring cell of the fourth cell;

[0161] Alternatively, the unified TCI status carries an indication of the PCI of the fourth cell's neighboring cells, or the association information of the fourth cell's neighboring cells.

[0162] Alternatively, the TCI state of at least one QCL type RS ID or all QCL type RS IDs in the fourth cell carries an indication of the PCI of the fourth cell's neighboring cells or the neighboring cell association information of the fourth cell.

[0163] Optionally, in this embodiment of the application, the indication of the neighbor cell association information can be determined by bit mapping.

[0164] Optionally, in this embodiment of the application, the aforementioned neighboring cell association information includes at least one of the following:

[0165] The period of the neighboring cell's RS;

[0166] The time-domain location of the neighboring cell RS;

[0167] The transmit power of the neighboring cell's RS;

[0168] Physical Cell Identifier (PCI) of neighboring cells.

[0169] In this embodiment of the application, the UE can determine the unified TCI status of the first cell and / or the second cell based on the first indication information.

[0170] The UE determines the cell where PCI handover occurs based on the first indication information, and the specific methods include:

[0171] According to the preset rules, determine a QCL type resource RS ID in the unified TCI state indicated in the signaling information as the target RS ID, such as QCL type A RS ID;

[0172] The UE considers a PCI handover to have occurred in the fourth cell if the following conditions are met: the RS corresponding to the target RS ID in the fourth cell belongs to a neighboring cell, or the TCI state of the RS corresponding to the target RS ID in the fourth cell carries the PCI or neighboring cell association information of the neighboring cell.

[0173] Optionally, in this embodiment of the application, if the first condition is met, the unified TCI status of the cell where the PCI handover occurs is the unified TCI status in the first indication information.

[0174] The first condition includes at least one of the following:

[0175] At least one cell is experiencing a PCI handover;

[0176] The RS corresponding to the unified TCI status in the first indication information of different cells corresponds to different cells;

[0177] The TC state of the RS corresponding to the unified TCI state in the first indication information of different cells is associated with different cells.

[0178] Optionally, in this embodiment of the application, the unified TCI status of the cell where PCI handover occurs refers to any of the following situations:

[0179] The unified TCI status of certain channels and / or RSs in the cell where PCI handover occurs;

[0180] The unified TCI status of all channels and / or RSs in the cell where PCI handover occurs.

[0181] Optionally, in this embodiment of the application, when the fourth condition is met, the UE falls back to the single-carrier scheduling state, and determines the serving cell according to the preset rules and deactivates other cells in the CC list. The unified TCI state in the first indication information is the unified TCI state of the serving cell.

[0182] The fourth condition includes at least one of the following:

[0183] In the first indication information of different cells, some or all RSs corresponding to the same cell may correspond to the same cell.

[0184] The TC state of some or all RSs corresponding to the unified TCI state in the first indication information of different cells is associated with the same cell.

[0185] It should be noted that all RSs corresponding to the target RS ID in all cells are associated with the same PCI, or all RSs’ TCI states carry the same neighboring cell’s PCI, or all RSs’ TCI states carry the same neighboring cell association information indication.

[0186] In all cells, all RSs corresponding to all QCL type resource RS IDs in the unified TCI are associated with the same PCI, or all RSs' TCI states carry the same neighboring cell's PCI, or all RSs' TCI states carry the same neighboring cell association information indication.

[0187] Optionally, in this embodiment, the unified TCI status of the serving cell refers to any of the following:

[0188] Unified TCI status of certain channels and / or RSs in the serving cell;

[0189] The unified TCI status of all channels and / or RSs in the serving cell;

[0190] The UE determines the rate matching mode of the first cell and / or the second cell based on the first indication information.

[0191] Optionally, in this embodiment of the application, multiple rate matching modes are configured in the first cell or the second cell respectively; the multiple rate matching modes can be associated with multiple PCIs; the multiple rate matching modes are related to the RS configuration information of multiple neighboring cells.

[0192] Optionally, in this embodiment of the application, if the rate matching mode is associated with a PCI, the UE considers that the RS resources in the cell corresponding to the PCI are unavailable for the PDSCH scheduling and transmission of the current serving cell.

[0193] Optionally, in this embodiment of the application, if the first indication information meets the first condition, the rate matching mode of the fifth cell can be divided into a first rate matching mode and a second rate matching mode.

[0194] Optionally, in this embodiment of the application, the fifth cell is at least one of the first cell and the second cell.

[0195] Optionally, in this embodiment of the application, the first rate matching mode can be determined according to a first preset rule, and the second rate matching mode can be determined according to a second preset rule.

[0196] Optionally, in this embodiment of the application, the first preset rule includes any of the following cases:

[0197] The PCI rate matching mode before the association switch;

[0198] Based on the data scheduling data of the cells other than the fifth cell, determine the rate matching mode for the fifth cell.

[0199] For example, when the fifth cell is the first cell, the PDSCH scheduling and transmission associated PCI of the second cell are connected. Then the rate matching mode of the fifth cell is a combination of the RS resources of the PCI before the associated handover in the first cell and the SSB resources of the PCI after the associated handover in the second cell.

[0200] Optionally, in this embodiment of the application, the second preset rule includes any of the following cases:

[0201] The rate matching mode of PCI after association switching;

[0202] Based on the data scheduling of the cells other than the fifth cell, the rate matching mode of the fifth cell is determined.

[0203] For example, when the fifth cell is the first cell, the PDSCH scheduling and transmission associated PCI before the handover in the second cell, then the rate matching mode of the fifth cell is a combination of the RS resources of the associated PCI after the handover in the first cell and the SSB resources of the associated PCI before the handover in the second cell.

[0204] Optionally, in this embodiment of the application, the UE considers that the PDSCH scheduling and transmission of the PCI before the associated handover should be based on the first rate matching mode.

[0205] Optionally, in this embodiment of the application, the UE believes that the PDSCH scheduling and transmission of the PCI after the associated handover should be based on the second rate matching mode.

[0206] Optionally, in this embodiment of the application, if the first indication information meets the second condition, the UE falls back to the single-carrier scheduling state, and determines the serving cell according to the preset rules and deactivates other cells in the CC list. The rate matching mode of the serving cell is determined according to the PCI associated with PDSCH scheduling and transmission.

[0207] Optionally, in this embodiment of the application, the PDSCH scheduling and transmission are associated with the pre-handover PCI of the serving cell, and the rate matching mode is determined based on the RS resource configuration associated with the pre-handover PCI.

[0208] Optionally, in this embodiment of the application, the PDSCH scheduling and transmission are associated with the handover of the PCI after the handover, and the rate matching mode is determined according to the RS resource configuration associated with the handover PCI.

[0209] This application provides a cell handover method. The UE performs a transmission mode switch on a target cell based on target indication information. This target indication information indicates the target unified TCI status, and the target cell includes the UE's corresponding first cell and / or second cell. In this scheme, under a CA scenario, the UE can switch the transmission mode on the target cell based on the target unified TCI status indication information to achieve fast cell handover. Compared to the traditional method of explicitly sending RRC reconfiguration signaling to notify the UE to perform cell handover, this improves system flexibility, reduces cell handover latency, and enhances the flexibility of cell handover.

[0210] It should be noted that the cell handover method provided in this application embodiment can be executed by a UE, a cell handover device, or a control module in the cell handover device for executing the cell handover method. This application embodiment uses the execution of the cell handover method by a UE as an example to illustrate the cell handover device provided in this application embodiment.

[0211] Figure 3 A schematic diagram of a possible structure of the cell handover device involved in an embodiment of this application is shown. For example... Figure 3 As shown, the cell handover device 60 may include an acquisition module 61 and an execution module 62.

[0212] The acquisition module 61 is used to acquire target indication information. The execution module 62 is used to switch the transmission mode of the target cell according to the target indication information; wherein the target indication information is used to indicate the target unified TCI status, and the target cell includes at least one of the following: the first cell corresponding to the UE and the second cell corresponding to the UE.

[0213] In one possible implementation, the first cell is the primary cell and the second cell is the secondary cell.

[0214] In one possible implementation, the above transmission method includes at least one of the following: unified TCI status and rate matching mode.

[0215] In one possible implementation, the aforementioned target indication information is any of the following: Downlink Control Information (DCI), Media Access Control Layer Control Unit (MAC CE) signaling, or Radio Resource Control (RRC) signaling.

[0216] In one possible implementation, the aforementioned target indication information is also used to indicate the source cell or source transmit / receive point (TRP) corresponding to the unified TCI state.

[0217] In one possible implementation, the aforementioned unified TCI state is a unified TCI state in a unified TCI state pool; the unified TCI state pool is a unified TCI state pool shared by the first information in the third cell; wherein, the third cell includes at least one of the following: the first cell, the second cell, all cells in the carrier element (CC) list configured by the network, neighboring cells of the first cell, neighboring cells of the second cell, and neighboring cells of all cells in the CC list configured by the network; the first information includes at least one of the following: reference signal RS, control channel, and data channel.

[0218] In one possible implementation, the execution module 62 is specifically used to determine the first unified TCI state of the target cell based on the target indication information; and to determine the cell in which PCI handover has occurred based on the first unified TCI state of the target cell; and to perform a transmission mode switch for the cell in which PCI handover has occurred.

[0219] In one possible implementation, the execution module 62 is specifically used to determine the RS identifier of a QCL type resource in the target unified TCI state as the target RS identifier according to the first preset rule; and to determine the first RS as the first unified TCI state of the target cell, wherein the first RS is the RS in the target cell corresponding to the target RS identifier.

[0220] In one possible implementation, the execution module 62 is specifically used to determine that the fourth cell is the cell where PCI handover is taking place, where the target cell includes the fourth cell and the first unified TCI state of the fourth cell satisfies the first condition; or, where the target cell includes the first cell and the second cell and the first joint TCI state of the fifth cell in the target cell satisfies the first condition, the fifth cell is determined to be the cell where PCI handover is taking place, where the fifth cell includes at least one of the following: the first cell and the second cell; wherein the first condition is any one of the following:

[0221] The first RS corresponding to the first unified TCI state of the target cell belongs to the neighboring cells of the target cell;

[0222] The first unified TCI state of the target cell corresponds to the quasi-co-located QCL resource RS of the first RS and the neighboring cells of the target cell;

[0223] The first unified TCI state of the target cell carries an indication of the PCI of the target cell's neighboring cells, or the neighboring cell association information of the target cell.

[0224] The first unified TCI state of the target cell corresponds to the TCI state of the first RS, which carries an indication of the PCI of the target cell's neighboring cells or the neighboring cell association information of the target cell.

[0225] In one possible implementation, the indication of the aforementioned neighbor cell association information is used to determine the neighbor cell association information; the neighbor cell association information includes at least one of the following: the period of the neighbor cell RS, the time domain location of the neighbor cell RS, the transmission power of the neighbor cell RS, and the PCI of the neighbor cell.

[0226] In one possible implementation, the execution module 62 is specifically used to determine the second unified TCI state of the target cell as the first unified TCI state of the target cell when a third condition is met; wherein the third condition includes at least one of the following:

[0227] The first RS corresponding to the first unified TCI state of the target cell and the RS corresponding to the unified TCI state of other cells besides the target cell belong to different cells;

[0228] The PCI carried in the first unified TCI state of the target cell is different from the PCI carried in the unified TCI state of other cells besides the target cell;

[0229] The PCI or neighbor cell related information carried by the TCI state of the first RS corresponding to the first unified TCI state of the target cell is different from the PCI or neighbor cell related information carried by the TCI state of the RS corresponding to the unified TCI state of other cells besides the target cell.

[0230] In one possible implementation, the second unified TCI state of the target cell described above is any of the following:

[0231] Unified TCI status of some channels and / or RS in the target cell;

[0232] The unified TCI status of all channels and / or RSs in the target cell.

[0233] In one possible implementation, the execution module 62 is specifically used to perform rate matching mode switching for the cell where PCI handover has occurred, provided that the first unified TCI state of the target cell meets the third condition.

[0234] In one possible implementation, the first cell and the second cell are each configured with multiple rate matching modes;

[0235] Multiple rate matching modes are associated with multiple PCIs, with each rate matching mode corresponding to one PCI.

[0236] Multiple rate matching modes are associated with the RS configuration information of multiple neighboring cells.

[0237] In one possible implementation, the rate matching mode of the target cell is determined by a second preset rule;

[0238] The second preset rule is at least one of the following:

[0239] The PCI rate matching mode before the association switch;

[0240] The rate matching mode of PCI after association switching;

[0241] Rate matching mode determined based on data scheduling of other cells besides the target cell.

[0242] In one possible implementation, the execution module 62 is specifically used to, upon satisfying the fourth condition, fall back to the single-carrier scheduling state, determine the serving cell according to the third preset rule, deactivate other cells in the CC list, and determine the second unified TCI state of the serving cell as the first unified TCI state of the serving cell; wherein the serving cell is the first cell or the second cell; wherein the fourth condition includes at least one of the following:

[0243] The first RS corresponding to the first unified TCI state of the target cell belongs to the same cell as the RS corresponding to the unified TCI state of at least one other cell besides the target cell.

[0244] The PCI carried by the first unified TCI state of the target cell is the same as the PCI carried by the unified TCI state of at least one other cell besides the target cell.

[0245] In one possible implementation, the second unified TCI state of the aforementioned serving cell is any of the following:

[0246] Unified TCI status of certain channels and / or RSs in the serving cell;

[0247] The unified TCI status of all channels and / or RSs in the serving cell.

[0248] In one possible implementation, the rate matching mode of the aforementioned serving cell is determined by the Physical Downlink Shared Channel (PDSCH) scheduling and the transmission associated PCI.

[0249] The PDSCH scheduling and transmission are associated with the pre-handover PCI of the serving cell, and the rate matching mode is determined based on the RS resource configuration associated with the pre-handover PCI.

[0250] The PDSCH scheduling and transmission are associated with the handover PCI of the serving cell, and the rate matching mode is determined based on the RS resource configuration associated with the handover PCI.

[0251] This application provides a cell handover device. In a CA scenario, the cell handover device can switch the transmission mode of the target cell according to the indication information of the target unified TCI status, so as to achieve fast cell handover. Compared with the traditional method of explicitly sending RRC reconfiguration signaling to notify the UE to perform cell handover, this improves the system flexibility, reduces cell handover latency, and enhances the flexibility of cell handover.

[0252] The cell handover device in this application embodiment can be a device, a device with an operating system or a UE, or a component, integrated circuit, or chip in the UE. The device or UE can be a mobile terminal or a non-mobile terminal. For example, a mobile terminal can include, but is not limited to, the types of UE 11 listed above, while a non-mobile terminal can be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not specifically limit the type of terminal.

[0253] The cell handover device provided in this application embodiment can implement all the processes implemented in the above method embodiments and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0254] Optionally, such as Figure 4 As shown, this application embodiment also provides a communication device 500, including a processor 501, a memory 502, and a program or instructions stored in the memory 502 and executable on the processor 501. For example, when the communication device 500 is a UE, the program or instructions executed by the processor 501 implement the various processes of the above method embodiments and can achieve the same technical effect.

[0255] This application embodiment also provides a UE, including a processor and a communication interface. The processor is used to perform a transmission mode switch on a target cell according to target indication information. The target indication information is used to indicate the target unified TCI state, and the target cell includes at least one of the following: a first cell corresponding to the UE and a second cell corresponding to the UE. This UE embodiment corresponds to the above-described UE-side method embodiment. All implementation processes and methods of the above method embodiments can be applied to this UE embodiment and achieve the same technical effect. Specifically, Figure 5 A schematic diagram of the hardware structure of a UE to implement an embodiment of this application.

[0256] The UE 100 includes, but is not limited to, at least some of the following components: radio frequency unit 101, network module 102, audio output unit 103, input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, and processor 110.

[0257] Those skilled in the art will understand that UE 100 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 110 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 5 The UE structure shown in the figure does not constitute a limitation on the UE. The UE may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0258] It should be understood that, in this embodiment, the input unit 104 may include a graphics processing unit (GPU) 1041 and a microphone 1042. The GPU 1041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 106 may include a display panel 1061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 107 includes a touch panel 1071 and other input devices 1072. The touch panel 1071 is also called a touch screen. The touch panel 1071 may include a touch detection device and a touch controller. Other input devices 1072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, power buttons, etc.), a trackball, a mouse, and a joystick, which will not be described in detail here.

[0259] In this embodiment, the radio frequency unit 101 receives downlink data from the network-side device and processes it for the processor 110; additionally, it sends uplink data to the network-side device. Typically, the radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0260] The memory 109 can be used to store software programs or instructions and various data. The memory 109 may primarily include a program or instruction storage area and a data storage area. The program or instruction storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 109 may include high-speed random access memory and non-volatile memory, which may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. For example, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0261] Processor 110 may include one or more processing units; optionally, processor 110 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications or instructions, and the modem processor mainly handles wireless communication, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 110.

[0262] The processor 110 is used to perform a transmission mode switch on the target cell according to the target indication information; wherein the target indication information is used to indicate the target unified TCI status, and the target cell includes at least one of the following: the first cell corresponding to the UE and the second cell corresponding to the UE.

[0263] This application provides a UE that, in a CA scenario, can switch the transmission mode of a target cell based on the indication information of the target unified TCI status, thereby achieving fast cell handover. Compared with the traditional method of explicitly sending RRC reconfiguration signaling to notify the UE to perform cell handover, this improves the system's flexibility, reduces cell handover latency, and enhances the flexibility of cell handover.

[0264] The UE provided in this application embodiment can implement the various processes implemented in the above method embodiments and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0265] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described cell handover method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0266] The processor mentioned above is the processor in the UE described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0267] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described cell handover method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0268] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0269] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0270] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network-side device, etc.) to execute the methods described in the various embodiments of this application.

[0271] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A cell handover method, characterized in that, include: The user equipment (UE) performs a transmission mode switch for the target cell based on the target indication information; The target indication information is used to indicate the target unified transmission configuration indication (TCI) status, and the target cell includes at least one of the following: the first cell corresponding to the UE and the second cell corresponding to the UE; The unified TCI state is a unified TCI state in the unified TCI state pool; The unified TCI state pool is the unified TCI state pool shared by the first information in the third cell; The third cell includes at least one of the following: the first cell, the second cell, all cells in the carrier unit (CC) list configured by the network, neighboring cells of the first cell, neighboring cells of the second cell, and neighboring cells of all cells in the CC list configured by the network. The first information includes at least one of the following: reference signal RS, control channel, and data channel.

2. The method according to claim 1, characterized in that, The first cell is the primary cell, and the second cell is the secondary cell.

3. The method according to claim 1 or 2, characterized in that, The transmission method includes at least one of the following: unified TCI status, rate matching mode.

4. The method according to claim 1, characterized in that, The target indication information is any one of the following: Downlink Control Information (DCI), Media Access Control Layer Control Unit (MAC CE) signaling, or Radio Resource Control (RRC) signaling.

5. The method according to claim 1, characterized in that, The target indication information is also used to indicate the source cell or source transmit / receive point (TRP) corresponding to the unified TCI status.

6. The method according to claim 1, characterized in that, The UE performs a transmission mode switch for the target cell based on the target indication information, including: The UE determines the first unified TCI state of the target cell based on the target indication information; The UE determines the cell where PCI handover will occur based on the first unified TCI state of the target cell; The UE performs a transmission mode switch for the cell where the PCI handover has occurred.

7. The method according to claim 6, characterized in that, The UE determines the first unified TCI state of the target cell based on the target indication information, including: The UE determines the RS identifier of a QCL type resource in the target unified TCI state as the target RS identifier according to the first preset rule; The UE determines the first RS as the first unified TCI state of the target cell, where the first RS is the RS in the target cell that corresponds to the target RS identifier.

8. The method according to claim 7, characterized in that, The UE determines the cell where PCI handover is occurring based on the first unified TCI state of the target cell, including: If the target cell includes a fourth cell and the first unified TCI state of the fourth cell satisfies a first condition, the UE determines that the fourth cell is the cell where the PCI handover occurred, and the fourth cell is either the first cell or the second cell; or, If the target cell includes the first cell and the second cell, and the first joint TCI state of the fifth cell in the target cell satisfies the first condition, the UE determines the fifth cell as the cell where the PCI handover occurs, and the fifth cell includes at least one of the following: the first cell and the second cell; The first condition is any one of the following: The first RS corresponding to the first unified TCI state of the target cell belongs to the neighboring cell of the target cell; The first unified TCI state of the target cell corresponds to the quasi-co-located QCL resource RS of the first RS, which is the neighboring cell of the target cell; The first unified TCI state of the target cell carries an indication of the PCI of the target cell's neighboring cells, or the neighboring cell association information of the target cell. The first unified TCI state of the target cell corresponds to the TCI state of the first RS, which carries an indication of the PCI of the target cell's neighboring cells or the neighboring cell association information of the target cell.

9. The method according to claim 8, characterized in that, The indication of the neighboring cell association information is used to determine the neighboring cell association information; The neighbor cell association information includes at least one of the following: the period of the neighbor cell RS, the time domain location of the neighbor cell RS, the transmission power of the neighbor cell RS, and the PCI of the neighbor cell.

10. The method according to claim 8, characterized in that, The UE performs a transmission mode switch for the cell where the PCI handover has occurred, including: If the third condition is met, the UE determines the second unified TCI state of the target cell as the first unified TCI state of the target cell; The third condition includes at least one of the following: The first RS corresponding to the first unified TCI state of the target cell and the RS corresponding to the unified TCI state of other cells besides the target cell belong to different cells; The PCI carried in the first unified TCI state of the target cell is different from the PCI carried in the unified TCI state of other cells besides the target cell. The PCI or neighbor cell related information carried by the TCI state of the first RS corresponding to the first unified TCI state of the target cell is different from the PCI or neighbor cell related information carried by the TCI state of the RS corresponding to the unified TCI state of other cells besides the target cell.

11. The method according to claim 10, characterized in that, The second unified TCI state of the target cell is any one of the following: The unified TCI status of some channels and / or RS in the target cell; The unified TCI status of all channels and / or RSs in the target cell.

12. The method according to claim 10, characterized in that, The UE performs a transmission mode switch for the cell where the PCI handover has occurred, including: If the first unified TCI state of the target cell satisfies the third condition, the UE performs a rate matching mode handover for the cell where the PCI handover has occurred.

13. The method according to claim 12, characterized in that, The first cell and the second cell are each configured with multiple rate matching modes; The multiple rate matching modes are associated with multiple PCIs, and each rate matching mode corresponds to one PCI. The multiple rate matching modes are related to the RS configuration information of multiple neighboring cells.

14. The method according to claim 12 or 13, characterized in that, The rate matching mode of the target cell is determined by a second preset rule; The second preset rule is at least one of the following: The PCI rate matching mode before the association switch; The rate matching mode of PCI after association switching; Rate matching mode determined based on data scheduling of other cells besides the target cell.

15. The method according to claim 8, characterized in that, The UE performs a transmission mode switch for the cell where the PCI handover has occurred, including: If the fourth condition is met, the UE falls back to the single-carrier scheduling state, determines the serving cell according to the third preset rule and deactivates other cells in the CC list, and determines the second unified TCI state of the serving cell as the first unified TCI state of the serving cell. Wherein, the serving cell is either the first cell or the second cell; The fourth condition includes at least one of the following: The first RS corresponding to the first unified TCI state of the target cell belongs to the same cell as the RS corresponding to the unified TCI state of at least one other cell besides the target cell. The PCI carried by the first unified TCI state of the target cell is the same as the PCI carried by the unified TCI state of at least one other cell besides the target cell.

16. The method according to claim 15, characterized in that, The second unified TCI state of the serving cell is any one of the following: The unified TCI status of some channels and / or RS in the serving cell; The unified TCI status of all channels and / or RSs in the serving cell.

17. The method according to claim 15 or 16, characterized in that, The rate matching mode of the serving cell is determined by the Physical Downlink Shared Channel (PDSCH) scheduling and the PCI associated with transmission. The PDSCH scheduling and transmission are associated with the PCI before handover of the serving cell, and the rate matching mode is determined based on the RS resource configuration associated with the PCI before handover. The PDSCH scheduling and transmission are associated with the PCI of the serving cell after handover, and the rate matching mode is determined according to the RS resource configuration associated with the PCI after handover.

18. A cell handover device, characterized in that, include: Execution module; The execution module is used to switch the transmission mode of the target cell according to the target indication information; The target indication information is used to indicate the target unified TCI status, and the target cell includes at least one of the following: the first cell corresponding to the UE and the second cell corresponding to the UE; The unified TCI state is a unified TCI state in the unified TCI state pool; The unified TCI state pool is the unified TCI state pool shared by the first information in the third cell; The third cell includes at least one of the following: the first cell, the second cell, all cells in the carrier unit (CC) list configured by the network, neighboring cells of the first cell, neighboring cells of the second cell, and neighboring cells of all cells in the CC list configured by the network. The first information includes at least one of the following: reference signal RS, control channel, and data channel.

19. The apparatus according to claim 18, characterized in that, The execution module is specifically configured to determine the first unified TCI state of the target cell based on the target indication information; determine the cell in which PCI handover has occurred based on the first unified TCI state of the target cell; and perform a transmission mode switch on the cell in which PCI handover has occurred.

20. The apparatus according to claim 19, characterized in that, The execution module is specifically configured to determine a QCL type resource RS identifier in the target unified TCI state as the target RS identifier according to a first preset rule; and to determine the first RS as the first unified TCI state of the target cell, wherein the first RS is the RS in the target cell corresponding to the target RS identifier.

21. The apparatus according to claim 20, characterized in that, The execution module is specifically configured to determine, when the target cell includes a fourth cell and the first unified TCI state of the fourth cell satisfies a first condition, that the fourth cell is the cell where PCI handover occurs, wherein the fourth cell is the first cell or the second cell; or, when the target cell includes the first cell and the second cell and the first joint TCI state of the fifth cell in the target cell satisfies a first condition, that the fifth cell is the cell where PCI handover occurs, wherein the fifth cell includes at least one of the following: the first cell and the second cell; The first condition is any one of the following: The first RS corresponding to the first unified TCI state of the target cell belongs to the neighboring cell of the target cell; The first unified TCI state of the target cell corresponds to the quasi-co-located QCL resource RS of the first RS, which is the neighboring cell of the target cell; The first unified TCI state of the target cell carries an indication of the PCI of the target cell's neighboring cells, or the neighboring cell association information of the target cell. The first unified TCI state of the target cell corresponds to the TCI state of the first RS, which carries an indication of the PCI of the target cell's neighboring cells or the neighboring cell association information of the target cell.

22. The apparatus according to claim 21, characterized in that, The execution module is specifically used to determine the second unified TCI state of the target cell as the first unified TCI state of the target cell when the third condition is met. The third condition includes at least one of the following: The first RS corresponding to the first unified TCI state of the target cell and the RS corresponding to the unified TCI state of other cells besides the target cell belong to different cells; The PCI carried in the first unified TCI state of the target cell is different from the PCI carried in the unified TCI state of other cells besides the target cell. The PCI or neighbor cell related information carried by the TCI state of the first RS corresponding to the first unified TCI state of the target cell is different from the PCI or neighbor cell related information carried by the TCI state of the RS corresponding to the unified TCI state of other cells besides the target cell.

23. The apparatus according to claim 22, characterized in that, The execution module is specifically used to perform rate matching mode switching for the cell where PCI handover has occurred, provided that the first unified TCI state of the target cell meets the third condition.

24. The apparatus according to claim 21, characterized in that, The execution module is specifically used to fall back to the single-carrier scheduling state when the fourth condition is met, and to determine the serving cell and deactivate other cells in the CC list according to the third preset rule, and to determine the second unified TCI state of the serving cell as the first unified TCI state of the serving cell. Wherein, the serving cell is either the first cell or the second cell; The fourth condition includes at least one of the following: The first RS corresponding to the first unified TCI state of the target cell belongs to the same cell as the RS corresponding to the unified TCI state of at least one other cell besides the target cell. The PCI carried by the first unified TCI state of the target cell is the same as the PCI carried by the unified TCI state of at least one other cell besides the target cell.

25. A user equipment (UE), characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the cell handover method as described in any one of claims 1 to 17.

26. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the cell handover method as described in any one of claims 1 to 17.

Images