Communication method, apparatus and storage medium

Abstract

The present application relates to the technical field of communications, and provides a communication method, an apparatus and a storage medium. The method comprises: a serving cell sends, to a UE, CSI report configuration information and CSI resource configuration information of at least one candidate cell; the serving cell sends, to the UE, instruction information, where the instruction information instructs to report a first CSI report; and the UE sends the first CSI report to a target cell. On the basis of the first CSI report reported by the UE, the target cell can use an appropriate transmission mode to schedule the UE for data transmission, thereby avoiding using only a single-stream transmission mode to schedule UEs for data transmission, and improving data transmission efficiency.

Description

Communication method, apparatus, and storage medium

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 202411389520.6, filed September 30, 2024, entitled “Communication method, apparatus, and storage medium,” which is incorporated by reference herein in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, and in particular to a communication method, apparatus, and storage medium. BACKGROUND

[0004] In some cases, for example, when the current cell environment of a user equipment (UE) deteriorates, the UE needs to be handed over.

[0005] In related technologies, cell handover can be performed through a layer 1 / layer 2 triggered mobility (LTM) procedure. In the LTM procedure, a network device provides configuration information of one or more candidate cells for a UE based on a measurement report (e.g., a radio resource management (RRM) measurement report or a layer 3 measurement report) reported by the UE; after the UE receives the configuration information, the UE sends a measurement report (e.g., a layer 1 measurement report) to the network device, and the network device determines to trigger LTM handover based on the measurement report reported by the UE, and sends an LTM cell handover command to the UE, and the UE switches to a target cell based on an indication in the handover command.

[0006] After the LTM procedure is completed, due to the lack of channel state information (CSI) information of the UE, the target cell can only schedule the UE for data transmission in a default single-stream transmission mode, resulting in low efficiency of data transmission. SUMMARY

[0007] The present application relates to a communication method, apparatus, and storage medium, and provides a scheme for improving data transmission efficiency.

[0008] In a first aspect, an embodiment of the present application provides a communication method, comprising:

[0009] receiving CSI report configuration information and CSI resource configuration information of at least one candidate cell sent by a serving cell;

[0010] receiving indication information sent by the serving cell, the indication information indicating reporting a first CSI report, the first CSI report being used for assisting a target cell in scheduling, the target cell being a cell in the at least one candidate cell;

[0011] sending the first CSI report to the target cell.

[0012] In a possible implementation, the receiving the indication information sent by the serving cell comprises:

[0013] receiving a cell switching command sent by the serving cell, the cell switching command containing the indication information.

[0014] In a possible implementation, QCL information of a CSI resource associated with the first CSI report is indicated by a TCI state identifier in the cell switching command.

[0015] In a possible implementation, the receiving the indication information sent by the serving cell comprises:

[0016] receiving a first DCI sent by the serving cell, the first DCI containing the indication information.

[0017] In a possible implementation, the receiving the indication information sent by the serving cell comprises:

[0018] receiving a first MAC CE sent by the serving cell, the first MAC CE containing the indication information.

[0019] In a possible implementation, the sending the first CSI report to the target cell comprises:

[0020] sending the first CSI report to the target cell on a first uplink resource; wherein the first uplink resource comprises any one of the following:

[0021] PUCCH resource or PUSCH resource contained in CSI report configuration information associated with the first CSI report; or

[0022] PUCCH resource or PUSCH resource indicated by the cell switching command; or

[0023] PUSCH resource scheduled by a second DCI sent by the target cell.

[0024] In a possible implementation, the sending the first CSI report to the target cell comprises:

[0025] transmitting the first CSI report to the target cell through a message 3 in a random access procedure in a cell handover procedure.

[0026] In a possible implementation, the transmitting the first CSI report to the target cell comprises:

[0027] transmitting the first CSI report to the target cell on the PUSCH resource scheduled by the first DCI.

[0028] In a possible implementation, the transmitting the first CSI report to the target cell comprises:

[0029] transmitting the first CSI report to the target cell on the PUCCH resource or the PUSCH resource indicated by the first MAC CE.

[0030] In a possible implementation, the first CSI report occupies a CSI processing unit (CPU) of the target cell and / or a CPU of the serving cell.

[0031] In a possible implementation, the occupation period of the CPU of the target cell starts from a first symbol and ends when the transmitting of the first CSI report is completed.

[0032] The first symbol is the first symbol in a symbol occupied by a latest CSI resource of a CSI reference resource, and a time domain position of the CSI reference resource is before a transmitting time of the first CSI report.

[0033] In a possible implementation, the occupation period of the CPU of the target cell starts from when the cell handover command takes effect and ends when the transmitting of the first CSI report is completed.

[0034] In a possible implementation, the occupation period of the CPU of the target cell starts from when the cell handover is completed and ends when the transmitting of the first CSI report is completed.

[0035] In a possible implementation, the occupation period of the CPU of the serving cell starts from a first symbol and ends when the cell handover is completed.

[0036] The first symbol is the first symbol in a symbol occupied by a latest CSI resource of a CSI reference resource, and a time domain position of the CSI reference resource is before a transmitting time of the first CSI report.

[0037] In a second aspect, an embodiment of the present application provides a communication method, comprising:

[0038] transmitting CSI report configuration information and CSI resource configuration information of at least one candidate cell;

[0039] transmitting indication information, the indication information indicating reporting a first CSI report, the first CSI report being used for assisting a target cell in scheduling, the target cell being a cell in the at least one candidate cell.

[0040] In a possible implementation, the transmitting indication information comprises:

[0041] transmitting a cell switching command, the cell switching command containing the indication information.

[0042] In a possible implementation, QCL information of a CSI resource associated with the first CSI report is indicated by a TCI state identifier in the cell switching command.

[0043] In a possible implementation, the transmitting indication information comprises:

[0044] transmitting a first DCI, the first DCI containing the indication information.

[0045] In a possible implementation, the transmitting indication information comprises:

[0046] transmitting a first MAC CE, the first MAC CE containing the indication information.

[0047] In a third aspect, an embodiment of the present application provides a communication apparatus, comprising a receiving module and a transmitting module, wherein:

[0048] The receiving module is configured to receive CSI report configuration information and CSI resource configuration information of at least one candidate cell transmitted by a serving cell.

[0049] The receiving module is further configured to receive indication information transmitted by the serving cell, the indication information indicating reporting a first CSI report, the first CSI report being used for assisting a target cell in scheduling, the target cell being a cell in the at least one candidate cell.

[0050] The transmitting module is configured to transmit the first CSI report to the target cell.

[0051] In a fourth aspect, an embodiment of the present application provides a communication apparatus, comprising a transmitting module, wherein:

[0052] The transmitting module is configured to transmit channel state information (CSI) report configuration information and CSI resource configuration information of at least one candidate cell.

[0053] The sending module is further configured to send indication information, where the indication information indicates reporting of a first CSI report, and the first CSI report is used to assist the target cell in scheduling.

[0054] In a fifth aspect, an embodiment of the present application provides a communication apparatus, comprising: a processor, a memory;

[0055] The memory stores computer-executable instructions.

[0056] The processor executes the computer-executable instructions stored in the memory, so as to implement the method according to the first aspect or the second aspect.

[0057] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to implement the method according to the first aspect or the second aspect when executed by a processor.

[0058] In a seventh aspect, an embodiment of the present application provides a computer program product, which comprises a computer program, and the computer program is used to implement the method according to the first aspect or the second aspect when executed by a processor.

[0059] In an eighth aspect, an embodiment of the present application provides a chip, and the chip stores a computer program, and the computer program is used to implement the method according to the first aspect or the second aspect when executed by the chip.

[0060] In a possible implementation, the chip is a chip in a chip module.

[0061] Embodiments of the present application provide a communication method, apparatus and storage medium. In the method, a serving cell sends CSI report configuration information and CSI resource configuration information of at least one candidate cell to a UE; the serving cell sends indication information to the UE, where the indication information indicates reporting of a first CSI report; and the UE performs CSI measurement on a target cell according to the indication information and the CSI report configuration information and the CSI resource configuration information of the at least one candidate cell, obtains the first CSI report, and sends the first CSI report to the target cell. The target cell can accurately determine a channel state between the target cell and the UE based on the first CSI report reported by the UE, and then can schedule the UE to perform data transmission by using a suitable transmission mode, thereby avoiding scheduling the UE to perform data transmission by using only a single-stream transmission mode, and improving the efficiency of data transmission. BRIEF DESCRIPTION OF DRAWINGS

[0062] FIG. 1 is a flow diagram of an LTM process in the related art;

[0063] FIG. 2 is a structural diagram of a cell handover command MAC CE in the related art;

[0064] FIG. 3 is a flow diagram of a communication method according to an embodiment of the present application;

[0065] FIG. 4 is a flow diagram of a communication method according to another embodiment of the present application;

[0066] FIG. 5 is a flow diagram of a communication method according to another embodiment of the present application;

[0067] FIG. 6 is a flow diagram of a communication method according to another embodiment of the present application;

[0068] FIG. 7 is a flow diagram of a communication method according to another embodiment of the present application;

[0069] FIG. 8 is a diagram of the location of a first symbol, a CSI reference resource, and a CSI resource according to an embodiment of the present application;

[0070] FIG. 9 is a diagram of the structure of a communication device 10 according to an embodiment of the present application;

[0071] FIG. 10 is a diagram of the structure of a communication device 20 according to an embodiment of the present application;

[0072] FIG. 11 is a diagram of the structure of a communication device 30 according to an embodiment of the present application. DETAILED DESCRIPTION

[0073] In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0074] In the embodiments of the present application, the term “at least one” refers to one or more. “Multiple” refers to two or more. “At least one of the following” or similar expressions refers to any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, or c can include one element or multiple elements.

[0075] In the embodiments of the present application, the term “and / or” is a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent: A alone, A and B together, and B alone. The character “ / ” generally represents that the associated objects before and after it are in an “or” relationship.

[0076] The first, second, and the like appearing in the embodiments of the present application are only for indicating and distinguishing the description objects, and do not have sequence, and do not represent special limitation of the number of the objects in the embodiments of the present application, and cannot constitute any limitation on the embodiments of the present application. For example, the first downlink control information (DCI), the second DCI, and the like are only used for distinguishing different DCIs, and do not represent different priorities or importance degrees of the two DCIs.

[0077] In the embodiments of the present application, "for example", "in some embodiments", "in other embodiments", and the like are used to represent an example, illustration, or description. Any embodiment or design scheme described as "for example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. In fact, the word "for example" is intended to present the concept in a specific way.

[0078] The technical solutions provided by the embodiments of the present application can be applied to various systems. The applicable systems can include, but are not limited to, a narrow band-internet of things (NB-IoT) system, a wideband code division multiple access (WCDMA) system, a code division multiple access 2000 (CDMA2000) system, a time division-synchronization code division multiple access (TDSCDMA) system, a long term evolution (LTE) system, a fifth generation mobile communication system or a possible sixth generation, seventh generation mobile communication system, a vehicle-mounted wireless short-range communication system, and a future mobile communication system.

[0079] The UE related to embodiments of the present application can also be referred to as a terminal, including various forms of access terminals, user units, user stations, mobile stations, mobile stations (MS), remote stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents or user equipment. The UE can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal in a 5G network, or a terminal in a future evolved public land mobile network (PLMN), etc. Embodiments of the present application are not limited thereto.

[0080] The network device related to embodiments of the present application can be an access network device, including a base station, which can include multiple cells serving UEs. According to different specific application scenarios, the base station can also be referred to as an access point, or can be a device in an access network that communicates with wireless terminals over an air interface through one or more sectors, or other names. For example, the network device related to embodiments of the present application can be an evolved network device (eNB or e-NodeB) in an LTE system, a 5G base station (gNB) in a next generation system (5G network architecture), etc. It can also be a home evolved Node B (HeNB), a relay node, a home base station (femto), a pico base station, a network test device, etc. Embodiments of the present application are not limited thereto. In some network structures, the network device can include a CU and a DU, and the CU and the DU can also be arranged geographically apart.

[0081] The related art related to the present application will be introduced first as follows.

[0082] In the LTM process, the network side can use layer 2 signaling (medium access control (MAC) control element (CE)) to instruct the UE to perform cell switching based on the layer 1 measurement result reported by the UE, so as to reduce the switching delay.

[0083] As shown in FIG. 1, the LTM process includes the following four parts:

[0084] (1) LTM preparation: UE sends a mobility measurement report to the base station, and the base station provides the UE with configuration information of one or more LTM candidate cells based on the measurement report.

[0085] (2) Early synchronization: The UE performs downlink synchronization on the LTM candidate cell before receiving the cell switch command, and determines the timing advance (TA) of the LTM candidate cell by measurement or sends a preamble message to the base station to complete the uplink synchronization.

[0086] (3) LTM cell handover execution: After the UE receives the configuration information of the LTM candidate cell, it continues to perform beam measurement and reporting of the LTM candidate cell. In addition, when the UE receives the cell switch command sent by the base station, the UE performs cell handover based on random access or cell handover without random access according to the content of the cell switch command. The cell switch command contains the target cell configuration identifier (ID), the uplink and downlink beam indication corresponding to the target cell (transmission configuration indicator (TCI) state ID, uplink (UL) TCI state ID), and the uplink resource indication for cell handover based on random access (random access preamble index, synchronization signal / physical broadcast channel (SS / PBCH) index, physical random access channel (PRACH) mask index), and the specific format is shown in FIG. 2.

[0087] (4) LTM cell handover completion: After the UE completes the cell handover, it sends a cell handover completion message to the base station. For cell handover based on random access, the cell handover is considered complete after the random access is completed; for cell handover without random access, the cell handover is considered complete when the UE receives a physical downlink control channel (PDCCH) scheduling a new uplink / downlink transmission.

[0088] After the completion of the LTM process, due to the lack of CSI information of the UE, the target cell can only use the default single-stream transmission mode to schedule the UE for data transmission, resulting in low efficiency of data transmission.

[0089] To solve the above technical problems, the application provides a communication method. When a serving cell indicates that a UE can perform measurement and report a first CSI report, the UE can perform CSI measurement on a target cell based on CSI report configuration information and CSI resource configuration information of at least one candidate cell sent by the serving cell, obtain the first CSI report, and send the first CSI report to the target cell. The target cell can schedule the UE for data transmission in a suitable transmission mode based on the first CSI report reported by the UE, thereby avoiding scheduling the UE for data transmission in a single-stream transmission mode, and further improving the efficiency of data transmission.

[0090] The technical solutions shown in the application will be described in detail below through specific embodiments. It should be noted that the following embodiments can exist independently or can be combined with each other. For the same or similar content, the description will not be repeated in different embodiments.

[0091] FIG. 3 is a flowchart of a communication method according to an embodiment of the application. As shown in FIG. 3, the method comprises the following steps.

[0092] S301. The serving cell sends CSI report configuration information and CSI resource configuration information of at least one candidate cell to the UE.

[0093] In other words, the UE receives the CSI report configuration information and the CSI resource configuration information of at least one candidate cell sent by the serving cell.

[0094] The "serving cell sends information, data, messages, or signaling to the UE" can mean that a network device (hereinafter referred to as a first network device) to which the serving cell belongs sends information, data, messages, or signaling to the UE, that is, the "serving cell sends information, data, messages, or signaling to the UE" can also be interpreted as the first network device sending information, data, messages, or signaling to the UE. The "UE receives information, data, messages, or signaling sent by the serving cell" can mean that the UE receives information, data, messages, or signaling sent by the first network device in the serving cell, that is, the "UE receives information, data, messages, or signaling sent by the serving cell" can be interpreted as the UE receiving information, data, messages, or signaling sent by the first network device.

[0095] The first network device can include multiple cells, and the cell that provides service for the UE in the multiple cells can be referred to as a serving cell.

[0096] The CSI reporting configuration information can include the content and reporting manner of the CSI reporting. The content of the CSI reporting can include at least one of the following CSI parameters: channel quality indicator (CQI), precoding matrix indicator (PMI), or rank indicator (RI). The reporting manner is periodic reporting or aperiodic reporting.

[0097] The CSI resource configuration information can include resources used for measuring CSI, for example, the resources used for measuring CSI can include at least one of the following: time domain resources, frequency domain resources, or spatial domain resources for transmitting a CSI reference signal (RS); and can also include the structure of the CSI-RS.

[0098] One candidate cell can correspond to one CSI reporting configuration information and one CSI resource configuration information, that is, the serving cell can configure one CSI reporting configuration information and one CSI resource configuration information for one candidate cell. One candidate cell can also correspond to multiple CSI reporting configuration information and multiple CSI resource configuration information, that is, the serving cell can configure multiple CSI reporting configuration information and multiple CSI resource configuration information for one candidate cell. Wherein, the serving cell configuring the candidate cell means that the network device to which the serving cell belongs configures the candidate cell.

[0099] The serving cell can send the UE the CSI reporting configuration information and the CSI resource configuration information of at least one candidate cell in the LTM preparation process.

[0100] In the following, the configuration positions of the CSI reporting configuration information and the CSI resource configuration information of each candidate cell are explained in the following two ways.

[0101] Method 1: One or more CSI reporting configuration information and CSI resource configuration information of each candidate cell are configured in the CSI candidate configuration of the candidate cell.

[0102] Each CSI reporting configuration information is associated with one CSI resource configuration information. For example, each CSI reporting configuration information can carry an identifier of one CSI resource configuration information; or each CSI reporting configuration information can carry a parameter used to indicate one CSI resource configuration information. Further, each CSI reporting configuration information can be associated with one CSI interference measurement (IM) resource. For example, each CSI reporting configuration information can carry an identifier of one CSI-IM resource; or each CSI reporting configuration information can carry a parameter used to indicate one CSI-IM resource.

[0103] Option 2: The CSI reporting configuration information and the CSI resource configuration information of at least one candidate cell are configured in the CSI measurement configuration of the serving cell.

[0104] Each CSI reporting configuration information is associated with one CSI resource configuration information, and the CSI-RS resource included in each CSI resource configuration information is the resource of the same candidate cell. Further, each CSI reporting configuration information can be associated with one CSI-IM resource.

[0105] In the embodiments of the present application, the CSI reporting configuration information can also be referred to as LTM CSI reporting configuration, the CSI resource configuration information can also be referred to as LTM CSI resource configuration, and the CSI-IM resource can also be referred to as LTM CSI-IM resource (ltm-csi-IM-resources for interference). The present application does not limit the specific names of the various configuration information.

[0106] S302: The serving cell sends indication information to the UE, indicating to report the first CSI report.

[0107] In other words, the UE receives the indication information sent by the serving cell.

[0108] The serving cell can send the indication information to the UE in the case of determining the target cell.

[0109] The target cell is a cell in the at least one candidate cell, and further, the target cell can be the cell indicated in the cell handover command. That is, the target cell can be the cell to be switched to the serving cell.

[0110] The first CSI report is used to assist the target cell in scheduling. That is, based on the first CSI report, the target cell can allocate appropriate resources, modulation and coding scheme (MCS), etc. to the UE.

[0111] After receiving the indication information, the UE can perform CSI measurement and generation of the first CSI report based on the indication information. Specifically, the UE can perform CSI measurement on the target cell based on the CSI resource configuration information of the target cell, and generate the first CSI report based on the CSI report configuration information of the target cell. Then, S303 is performed.

[0112] S303, the UE sends the first CSI report to the target cell.

[0113] In other words, the target cell receives the first CSI report sent by the UE.

[0114] The "UE sends the first CSI report to the target cell" can mean that the UE sends the first CSI report to a network device (hereinafter referred to as a second network device) to which the target cell belongs; that is, the "UE sends the first CSI report to the target cell" can be interpreted as the UE sending the first CSI report to the second network device.

[0115] The first network device and the second network device can be the same network device, or can be different network devices.

[0116] The first CSI report can include at least one CSI parameter between the UE and the serving cell, such as CQI, PMI, or RI. After receiving the first CSI report, the serving cell can accurately determine the channel state between the target cell and the UE based on the first CSI report, and then can schedule the UE for data transmission in a suitable transmission mode (i.e., the target cell can allocate appropriate resources, MCS, etc. to the terminal to make the terminal perform data transmission with the target cell on appropriate resources using appropriate MCS), avoiding scheduling the UE for data transmission only in a single-stream transmission mode, and improving the efficiency of data transmission.

[0117] Based on the embodiment shown in FIG. 3, the following describes how the serving cell sends the indication information through the following several indication modes.

[0118] Indication mode 1: the serving cell sends a cell switching command to the UE, and the cell switching command contains the indication information.

[0119] In other words, the UE receives the cell switching command sent by the serving cell, and the cell switching command contains the indication information.

[0120] In the case where the serving cell is configured with one CSI report configuration information, the length of the indication information can be 1 bit. When the value of the bit is 1, it can indicate that the CSI report (i.e., the first CSI report) corresponding to the CSI report configuration information is reported; when the value of the bit is 0, it can indicate that the CSI report corresponding to the CSI report configuration information is not reported; vice versa.

[0121] In the case that the serving cell is configured with multiple CSI reporting configuration information, the length of the indication information can be multiple bits.

[0122] For example, if the serving cell is configured with 3 CSI reporting configuration information, namely CSI reporting configuration information 1, CSI reporting configuration information 2 and CSI reporting configuration information 3; the length of the indication information can be 3 bits, 1 bit can correspond to one CSI reporting configuration information; if the 1st bit corresponds to the CSI reporting configuration information 1, the 2nd bit corresponds to the CSI reporting configuration information 2, and the 3rd bit corresponds to the CSI reporting configuration information 3, when the indication information is 010, it means that the CSI report corresponding to the CSI reporting configuration information 2 (i.e. the first CSI report) is reported.

[0123] In a possible implementation, the quasi co-location (QCL) information of the CSI resource associated with the first CSI report is indicated by the TCI state identifier in the cell switching command. That is, the CSI resource associated with the first CSI report can be transmitted by the beam indicated by the TCI state identifier in the cell switching command.

[0124] The cell switching command can also be referred to as the LTM cell switching command.

[0125] The indication method 2 is that the serving cell sends the first DCI to the UE, and the first DCI contains the indication information.

[0126] In other words, the UE receives the first DCI sent by the serving cell, and the first DCI contains the indication information.

[0127] The indication information can be carried in the CSI request field of the first DCI.

[0128] The first DCI can be sent before the cell switching command or after the cell switching command.

[0129] The indication method 3 is that the serving cell sends the first MAC CE to the UE, and the first MAC CE contains the indication information.

[0130] In other words, the UE receives the first MAC CE sent by the serving cell, and the first MAC CE contains the indication information.

[0131] The first MAC CE can be sent before the cell switching command or after the cell switching command.

[0132] After the serving cell determines the target cell, the serving cell can send the indication information to the UE, so that the UE can timely perform CSI measurement and generate the first CSI report on the target cell during the LTM cell switching execution process.

[0133] It should be noted that the indication information in the embodiments of the present application can also be referred to as trigger information, determination information, etc. The present application does not limit the specific name of the information. As long as the function of the information is the same as the function of the indication information in the present application, the information can be considered equivalent to the indication information in the present application.

[0134] On the basis of the above, in the following, how the UE sends the first CSI report to the target cell after generating the first CSI report is described in detail through the following reporting modes.

[0135] Reporting mode 1: the UE sends the first CSI report to the target cell on the first uplink resource.

[0136] The first resource can include any one of the following:

[0137] (1) The physical uplink control channel (PUCCH) resource or the physical uplink shared channel (PUSCH) resource contained in the CSI report configuration information associated with the first CSI report.

[0138] That is, the CSI report configuration information not only contains the corresponding content in S301, but also contains the PUCCH resource or the PUSCH resource used to report the CSI report.

[0139] The CSI report configuration information associated with the first CSI report can also be referred to as the CSI report configuration information corresponding to the first CSI report. For example, if the CSI report configuration information 1 is the CSI report configuration information of cell 1, the UE can generate the CSI report of cell 1 based on the CSI report configuration information 1, and the CSI report configuration information 1 can be referred to as the CSI report configuration information associated with the CSI report of cell 1.

[0140] (2) The PUCCH resource or the PUSCH resource indicated by the cell handover command.

[0141] (3) The PUSCH resource scheduled by the second DCI sent by the target cell.

[0142] The target cell can send the second DCI to the UE after the completion of the LTM cell handover.

[0143] Further, the CSI request field in the second DCI can indicate the UE to report the first CSI report.

[0144] Reporting mode 2: the UE sends the first CSI report to the target cell through the message 3 in the random access process in the cell handover execution process.

[0145] Reporting mode 3: the UE sends the first CSI report to the target cell on the PUSCH resource scheduled by the first DCI.

[0146] The first DCI is sent by the serving cell, and indicates the UE to perform CSI measurement on the target cell and report the first CSI report.

[0147] Reporting mode 4: the UE sends the first CSI report to the target cell on the PUCCH resource or the PUSCH resource indicated by the first MAC CE.

[0148] The first MAC CE is sent by the serving cell, and indicates the UE to perform CSI measurement on the target cell and report the first CSI report.

[0149] Based on the above, the following gives several specific examples to explain the scheme of the application in detail.

[0150] Fig. 4 is a flowchart of a communication method provided by an embodiment of the application. As shown in Fig. 4, the method comprises:

[0151] S401: the serving cell sends the UE the CSI report configuration information and the CSI resource configuration information of at least one candidate cell.

[0152] It should be noted that the execution process of S401 can refer to the execution process of S301, which will not be repeated here.

[0153] S402: the serving cell sends the UE a cell switching command, and the cell switching command contains indication information indicating to report the first CSI report.

[0154] It should be noted that the execution process of S402 can refer to the related content in S302 and the aforementioned indication mode 1, which will not be repeated here.

[0155] S403: the UE sends the first CSI report to the target cell on the first uplink resource.

[0156] It should be noted that the execution process of S403 can refer to the related content in the aforementioned reporting mode 1, which will not be repeated here.

[0157] The beneficial effects of the embodiment shown in Fig. 4 are the same as those of the embodiment shown in Fig. 3, which will not be repeated here.

[0158] Fig. 5 is a flowchart of a communication method provided by an embodiment of the application. As shown in Fig. 5, the method comprises:

[0159] S501: the serving cell sends the UE the CSI report configuration information and the CSI resource configuration information of at least one candidate cell.

[0160] It should be noted that the execution process of S501 can refer to the execution process of S301, which will not be repeated here.

[0161] S502, the serving cell sends a cell switching command to the UE, and the cell switching command contains indication information indicating to report the first CSI report.

[0162] It should be noted that the execution process of S502 can refer to the related content in S302 and the aforementioned indication mode 1, which will not be repeated here.

[0163] S503, the UE sends the first CSI report to the target cell through message 3 in the random access process in the cell switching execution process.

[0164] The beneficial effects of the embodiment shown in FIG. 5 are the same as those of the embodiment shown in FIG. 3, which will not be repeated here.

[0165] FIG. 6 is a flowchart of a communication method according to an embodiment of the present application. As shown in FIG. 6, the method comprises:

[0166] S601, the serving cell sends the UE CSI report configuration information and CSI resource configuration information of at least one candidate cell.

[0167] It should be noted that the execution process of S601 can refer to the execution process of S301, which will not be repeated here.

[0168] S602, the serving cell sends the UE a first DCI, and the first DCI contains indication information indicating to report the first CSI report.

[0169] It should be noted that the execution process of S602 can refer to the related content in S302 and the aforementioned indication mode 2, which will not be repeated here.

[0170] S603, the UE sends the first CSI report to the target cell on the PUSCH resource scheduled by the first DCI.

[0171] The beneficial effects of the embodiment shown in FIG. 6 are the same as those of the embodiment shown in FIG. 3, which will not be repeated here.

[0172] FIG. 7 is a flowchart of a communication method according to an embodiment of the present application. As shown in FIG. 7, the method comprises:

[0173] S701, the serving cell sends the UE CSI report configuration information and CSI resource configuration information of at least one candidate cell.

[0174] It should be noted that the execution process of S701 can refer to the execution process of S301, which will not be repeated here.

[0175] S702, the serving cell sends a first MAC CE to the UE, the first MAC CE containing indication information indicating to report the first CSI report.

[0176] It should be noted that the execution process of S702 can refer to S302 and the related content in the aforementioned indication mode 3, which will not be described here.

[0177] S703, the UE sends the first CSI report to the target cell on the PUCCH resource or the PUSCH resource indicated by the first MAC CE.

[0178] The beneficial effects of the embodiment shown in FIG. 7 are the same as those of the embodiment shown in FIG. 3, which will not be described here.

[0179] On the basis of any of the above embodiments, the following will describe in detail how the first CSI report occupies the CSI processing unit (CPU).

[0180] In one possible implementation, the first CSI report can occupy the CPU of the target cell and / or the CPU of the serving cell. That is, the UE can occupy the CSI processing unit CPU of the target cell and / or the CPU of the serving cell to process the first CSI report.

[0181] The way in which the first CSI report occupies the CPU of the target cell includes any of the following:

[0182] Occupation mode 1: the occupation period of the CPU of the target cell starts from the first symbol and ends when the first CSI report is sent.

[0183] The first symbol is the first symbol in the symbol occupied by the latest one of the CSI resources of the CSI reference resource.

[0184] The time domain position of the CSI reference resource is located before the sending time of the first CSI report. That is, the CSI reference resource is a time-frequency resource in at least one time slot before the time slot where the first CSI report is reported.

[0185] The latest one of the CSI resources of the CSI reference resource can refer to a CSI resource located before the time slot of the CSI reference resource in the time domain, and the CSI resource and the CSI reference resource are adjacent in the time domain. In the time domain, there can be a gap between the CSI resource and the CSI reference resource, or there can be no gap.

[0186] For example, as shown in FIG. 8, the first CSI report is reported at symbol 11, the CSI reference resource is located at symbol 7 to symbol 9, CSI resource 1 is located at symbol 4 to symbol 5, and CSI resource 2 is located at symbol 1 to symbol 2. The latest CSI resource of the CSI reference resource is CSI resource 1, and the first symbol is symbol 4.

[0187] The CSI resource refers to a resource for transmitting a CSI-RS.

[0188] The occupation period of the CPU of the target cell starts from the cell switching command taking effect to the end of sending the first CSI report.

[0189] That is, the occupation period of the CPU of the target cell starts from the UE successfully sending a hybrid automatic repeat request acknowledgement (HARQ-ACK) message of a physical downlink shared channel (PDSCH) carrying the cell switching command to the end of sending the first CSI report.

[0190] The occupation period of the CPU of the target cell starts from the end of the cell switching to the end of sending the first CSI report.

[0191] The first CSI report occupies the CPU of the serving cell from the first symbol to the end of the cell switching; the definition of the first symbol can be referred to the description in the occupation mode 1, which will not be described here.

[0192] It should be noted that the current serving cell can be referred to as a first cell, and the target cell can be referred to as a second cell, and the second cell is a cell to be switched to a serving cell.

[0193] FIG. 9 is a structural schematic diagram of a communication apparatus 10 provided by an embodiment of the present application. As shown in FIG. 10, the apparatus 10 includes:

[0194] The receiving module 11 is configured to receive CSI report configuration information and CSI resource configuration information of at least one candidate cell sent by a serving cell.

[0195] The receiving module 11 is further configured to receive indication information sent by the serving cell, the indication information indicating to report a first CSI report, and the first CSI report being used for assisting a target cell in scheduling.

[0196] The sending module 12 is configured to send the first CSI report to the target cell.

[0197] In a possible implementation, the receiving module 11 is specifically configured to:

[0198] receive a cell handover command sent by the serving cell, the cell handover command containing the indication information.

[0199] In a possible implementation, the QCL information of the CSI resource associated with the first CSI report is indicated by the TCI state identifier in the cell handover command.

[0200] In a possible implementation, the receiving module 11 is specifically configured to

[0201] receive a first DCI sent by the serving cell, the first DCI containing the indication information.

[0202] In a possible implementation, the receiving module 11 is specifically configured to

[0203] receive a first MAC CE sent by the serving cell, the first MAC CE containing the indication information.

[0204] In a possible implementation, the sending module 12 is specifically configured to:

[0205] send the first CSI report to the target cell on a first uplink resource; wherein the first uplink resource includes any of the following:

[0206] a PUCCH resource or a PUSCH resource contained in CSI report configuration information associated with the first CSI report; or

[0207] a PUCCH resource or a PUSCH resource indicated by the cell handover command; or

[0208] a PUSCH resource scheduled by a second DCI sent by the target cell.

[0209] In a possible implementation, the sending module 12 is specifically configured to:

[0210] send the first CSI report to the target cell through a message 3 in a random access procedure in the cell handover procedure.

[0211] In a possible implementation, the sending module 12 is specifically configured to:

[0212] send the first CSI report to the target cell on a PUSCH resource scheduled by the first DCI.

[0213] In a possible implementation, the sending module 12 is specifically configured to:

[0214] send the first CSI report to the target cell on a PUCCH resource or a PUSCH resource indicated by the first MAC CE.

[0215] In a possible implementation, the first CSI report occupies a CSI processing unit CPU of the target cell and / or a CPU of the serving cell.

[0216] In a possible implementation, the occupation period of the CPU of the target cell starts from a first symbol and ends when the sending of the first CSI report is completed; wherein,

[0217] The first symbol is the first symbol in a symbol occupied by a latest CSI resource of the CSI reference resource, and a time domain position of the CSI reference resource is before a sending time of the first CSI report.

[0218] In a possible implementation, the occupation period of the CPU of the target cell starts from when a cell switching command takes effect and ends when the sending of the first CSI report is completed.

[0219] In a possible implementation, the occupation period of the CPU of the target cell starts from when a cell switching is completed and ends when the sending of the first CSI report is completed.

[0220] In a possible implementation, the occupation period of the CPU of the serving cell starts from a first symbol and ends when a cell switching is completed; wherein,

[0221] The first symbol is the first symbol in a symbol occupied by a latest CSI resource of the CSI reference resource, and a time domain position of the CSI reference resource is before a sending time of the first CSI report.

[0222] The communication apparatus 10 can perform the steps executed by the UE in the method embodiments described above, and the implementation principles and beneficial effects are similar, which will not be repeated here.

[0223] FIG. 10 is a structural schematic diagram of a communication apparatus 20 provided by an embodiment of the present application. As shown in FIG. 10, the apparatus 20 includes:

[0224] The sending module 21 is configured to send CSI report configuration information and CSI resource configuration information of at least one candidate cell.

[0225] The sending module 21 is further configured to send indication information, the indication information indicating that a first CSI report is reported, and the first CSI report is used to assist a target cell in scheduling, and the target cell is a cell in the at least one candidate cell.

[0226] In a possible implementation, the sending module 21 is specifically configured to:

[0227] The sending module 21 is further configured to send a cell switching command, and the cell switching command contains the indication information.

[0228] In a possible implementation, the QCL information of the CSI resource associated with the first CSI report is indicated by a TCI state identification in the cell switching command.

[0229] In a possible implementation, the sending module 21 is specifically configured to:

[0230] sending the first DCI, wherein the first DCI contains the indication information.

[0231] In a possible implementation, the sending module 21 is specifically configured to:

[0232] sending the first MAC CE, wherein the first MAC CE contains the indication information.

[0233] The communication apparatus 20 can perform the steps performed by the network equipment to which the serving cell belongs in the method embodiments described above, and the implementation principles and beneficial effects are similar, which will not be described here in detail.

[0234] FIG. 11 is a structural schematic diagram of a communication apparatus 30 provided by an embodiment of the present application. Referring to FIG. 11, the apparatus 30 can include a transceiver 31, a memory 32, and a processor 33. The transceiver 31 can include a transmitter and / or a receiver. The transmitter can also be referred to as a sender, a transmitter, a sending port or a sending interface, and the like. The receiver can also be referred to as a receiver, a receiver, a receiving port or a receiving interface, and the like. Exemplarily, the transceiver 31, the memory 32, and the processor 33 are connected to each other through a bus 34.

[0235] The memory 32 is configured to store program instructions.

[0236] The processor 33 is configured to execute the program instructions stored in the memory, so as to enable the communication apparatus 30 to perform the steps performed by the UE or the steps performed by the network equipment to which the serving cell belongs in the method embodiments described above.

[0237] The transceiver 31 is configured to perform the transceiving functions of the communication apparatus 30 in the communication method described above.

[0238] The communication apparatus 30 can be a chip, a module, an integrated development environment (IDE), and the like.

[0239] The communication apparatus 30 can perform the steps performed by the UE or the steps performed by the network equipment to which the serving cell belongs in the method embodiments described above, and the implementation principles and beneficial effects are similar, which will not be described here in detail.

[0240] The embodiment of the present application provides a computer readable storage medium, and the computer readable storage medium stores computer execution instructions. When the computer execution instructions are executed by a computer, the communication method of any one of the above is executed.

[0241] The embodiment of the present application can also provide a computer program product, which can be executed by a processor. When the computer program product is executed by a computer, the communication method of any one of the above is executed.

[0242] All or part of the steps of the above method embodiments can be completed by program instruction related hardware. The foregoing program can be stored in a readable memory. When the program is executed, the steps of the above method embodiments are executed; and the foregoing memory (storage medium) includes a read only memory (read only memory, ROM), a random access memory (random access memory, RAM), a flash memory, a hard disk, a solid state disk, a magnetic tape, a floppy disk, an optical disc and any combination thereof.

[0243] The embodiment of the present application is described with reference to the flowchart and / or block diagram of the method, device (system) and computer program product according to the embodiment of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of the flows and / or blocks in the flowchart and / or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processing unit of a general purpose computer, a special purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processing unit of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0244] These computer program instructions can also be stored in a computer readable memory that can guide the computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer readable memory produce a product including instruction devices, which implement the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0245] These computer program instructions can also be loaded into a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to produce a computer implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0246] It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A communication method applied to a terminal, comprising: receiving channel state information (CSI) reporting configuration information and CSI resource configuration information of at least one candidate cell sent by a serving cell; receiving indication information sent by the serving cell, the indication information indicating to report a first CSI report, the first CSI report being used to assist a target cell in scheduling, the target cell being a cell in the at least one candidate cell; sending the first CSI report to the target cell.

2. The method of claim 1, wherein, The receiving the indication information sent by the serving cell comprises: receiving a cell handover command sent by the serving cell, the cell handover command containing the indication information.

3. The method of claim 2, wherein, QCL information of a CSI resource associated with the first CSI report is indicated by a transmission configuration indication (TCI) state in the cell handover command.

4. The method of claim 1, wherein, The receiving the indication information sent by the serving cell comprises: receiving a first downlink control information (DCI) sent by the serving cell, the first DCI containing the indication information.

5. The method of claim 1, wherein, The receiving the indication information sent by the serving cell comprises: receiving a first medium access control (MAC) control element (CE) sent by the serving cell, the first MAC CE containing the indication information.

6. The method of claim 2, wherein, The sending the first CSI report to the target cell comprises: sending the first CSI report to the target cell on a first uplink resource, wherein the first uplink resource comprises any one of the following: a physical uplink control channel (PUCCH) resource or a physical uplink shared channel (PUSCH) resource contained in CSI reporting configuration information associated with the first CSI report; or a PUCCH resource or a PUSCH resource indicated by the cell handover command; or a PUSCH resource scheduled by a second DCI sent by the target cell.

7. The method of claim 2, wherein, The sending the first CSI report to the target cell comprises: sending the first CSI report to the target cell through a message 3 in a random access procedure in a cell handover procedure.

8. The method of claim 4, wherein, The sending the first CSI report to the target cell comprises: sending the first CSI report to the target cell on a PUSCH resource scheduled by the first DCI.

9. The method of claim 5, wherein, The sending the first CSI report to the target cell comprises: sending the first CSI report to the target cell on a PUCCH resource or a PUSCH resource indicated by the first MAC CE.

10. The method of any one of claims 1-9, wherein, The first CSI report occupies a CSI processing unit (CPU) of the target cell and / or a CPU of the serving cell.

11. The method of claim 10, wherein, An occupation period of the CPU of the target cell starts from a first symbol and ends when the sending of the first CSI report is completed, wherein the first symbol is the first symbol in symbols occupied by a latest CSI resource of a CSI reference resource, a time domain position of the CSI reference resource being located before a sending time of the first CSI report.

12. The method of claim 10, wherein, The occupation period of the CPU of the target cell starts from when the cell handover command takes effect and ends when the sending of the first CSI report is completed.

13. The method of claim 10, wherein, The occupation period of the CPU of the target cell starts from the completion of cell switching and ends when the first CSI report is sent.

14. The method according to any one of claims 10-13, wherein, The occupation period of the CPU of the serving cell starts from the first symbol and ends when the cell switching is completed. The first symbol is the first symbol in the symbol occupied by the latest CSI resource of the CSI reference resource, and the time domain position of the CSI reference resource is before the sending time of the first CSI report.

15. A communication method applied to a network device, comprising: sending channel state information (CSI) report configuration information and CSI resource configuration information of at least one candidate cell; sending indication information indicating that a first CSI report is to be reported, the first CSI report being used for assisting a target cell in scheduling, the target cell being a cell in the at least one candidate cell.

16. The method of claim 15, wherein, The sending of the indication information comprises: sending a cell switching command, the cell switching command containing the indication information.

17. The method of claim 16, wherein, QCL information of a CSI resource associated with the first CSI report is indicated by a transmission configuration indication (TCI) state identifier in the cell switching command.

18. The method of claim 15, wherein, The sending of the indication information comprises: sending a first downlink control information (DCI), the first DCI containing the indication information.

19. The method of claim 15, wherein, The sending of the indication information comprises: sending a first medium access control (MAC) control element (CE), the first MAC CE containing the indication information.

20. A communication device for use in a terminal wherein comprising a receiving module and a sending module, wherein The receiving module is configured to receive channel state information (CSI) report configuration information and CSI resource configuration information of at least one candidate cell sent by a serving cell. The receiving module is further configured to receive indication information sent by the serving cell, the indication information indicating that a first CSI report is to be reported, the first CSI report being used for assisting a target cell in scheduling, the target cell being a cell in the at least one candidate cell. The sending module is configured to send the first CSI report to the target cell.

21. A communication apparatus for a network device, comprising a sending module, wherein The sending module is configured to send channel state information (CSI) report configuration information and CSI resource configuration information of at least one candidate cell. The sending module is further configured to send indication information indicating that a first CSI report is to be reported, the first CSI report being used for assisting a target cell in scheduling, the target cell being a cell in the at least one candidate cell.

22. A communications device comprising: a processor and a memory; The memory stores computer-executable instructions. The processor executes the computer-executable instructions stored in the memory to implement the method of any one of claims 1-14 or the method of any one of claims 15-19.

23. A computer readable storage medium, wherein, The computer-readable storage medium stores computer-executable instructions for implementing the method of any one of claims 1-14 or the method of any one of claims 15-19 when the computer-executable instructions are executed by a processor.

24. A computer program product, wherein, A computer program comprising computer program elements which, when executed by a processor, implement the method according to any one of claims 1-14, or the method according to any one of claims 15-19.

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