Indication method and device for carrier aggregation, equipment and storage medium

Abstract

The invention relates to a divisional application of which the application number is 202380098212.5. The invention discloses an indication method and device for carrier aggregation, equipment and a storage medium, and belongs to the technical field of mobile communication. The method is executed by a terminal, and comprises: receiving an RRC reconfiguration message sent by a network device (301), the RRC reconfiguration message being used for carrying LTM candidate configuration information, and the LTM candidate configuration information being used for indicating configuration of a candidate primary cell; performing L1 measurement on the candidate primary cell and the primary and secondary cells and / or secondary cells associated with the candidate primary cell to obtain an L1 measurement report (302); reporting the L1 measurement report to the network device (303); receiving first indication information sent by the network device according to the L1 measurement report (304); the first indication information is used for indicating the terminal to add and / or activate the primary and secondary cells and / or secondary cells for carrier aggregation.

Description

[0001] This application is a divisional application of Chinese application No. 202380098212.5, entitled “Indication Method, Apparatus, Device and Storage Medium for Carrier Aggregation”, filed on August 11, 2023. Technical Field

[0002] This application relates to the field of mobile communication technology, and in particular to an indication method, apparatus, device and storage medium for carrier aggregation. Background Technology

[0003] To support greater bandwidth, communication systems can use carrier aggregation (CA) to jointly schedule and utilize resources on multiple component carriers (CCs).

[0004] In related technologies, in carrier aggregation scenarios, after a terminal accesses the primary cell or completes a handover of the primary cell, network equipment can add and / or activate secondary cells for the terminal via signaling. Summary of the Invention

[0005] This application provides an indication method, apparatus, device, and storage medium for carrier aggregation. The technical solution is as follows: On one hand, embodiments of this application provide an indication method for carrier aggregation, the method being executed by a terminal, the method comprising: Receive an RRC reconfiguration message sent by a network device, wherein the RRC reconfiguration message is used to carry LTM candidate configuration information, and the LTM candidate configuration information is used to indicate the configuration of the candidate primary cell; L1 measurement is performed on the candidate primary cell, as well as the primary and / or secondary cells associated with the candidate primary cell, and an L1 measurement report is obtained; The L1 measurement report is then submitted to the network device. The terminal receives a first indication message sent by the network device based on the L1 measurement report; the first indication message is used to instruct the terminal to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation.

[0006] On one hand, embodiments of this application provide an indication method for carrier aggregation, the method being executed by a network device, the method comprising: Send an RRC reconfiguration message to the terminal. The RRC reconfiguration message is used to carry LTM candidate configuration information, which is used to indicate the configuration of the candidate primary cell. Receive the L1 measurement report reported by the terminal, which is obtained by performing L1 measurements on the candidate primary cell and the primary and / or secondary cells associated with the candidate primary cell; The terminal is sent a first instruction message according to the L1 measurement report; the first instruction message is used to instruct the terminal to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation.

[0007] On the other hand, embodiments of this application provide an indication device for carrier aggregation, the device comprising: The receiving module is used to receive an RRC reconfiguration message sent by a network device. The RRC reconfiguration message carries LTM candidate configuration information, which indicates the configuration of the candidate primary cell. The measurement module is used to perform L1 measurements on the candidate primary cell, as well as the primary and secondary cells and / or secondary cells associated with the candidate primary cell, and to obtain an L1 measurement report; The sending module is used to report the L1 measurement report to the network device; The receiving module is further configured to receive first indication information sent by the network device according to the L1 measurement report; the first indication information is used to instruct the terminal to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation.

[0008] On the other hand, embodiments of this application provide an indication device for carrier aggregation, the device comprising: The sending module is used to send an RRC reconfiguration message to the terminal. The RRC reconfiguration message is used to carry LTM candidate configuration information, which is used to indicate the configuration of the candidate primary cell. The receiving module is configured to receive an L1 measurement report reported by the terminal, which is obtained by performing L1 measurements on the candidate primary cell and the primary and / or secondary cells associated with the candidate primary cell. The transmitting module is further configured to transmit first indication information to the terminal based on the L1 measurement report; the first indication information is used to instruct the terminal to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation.

[0009] On the other hand, embodiments of this application provide a terminal, which includes a processor, a memory, and a transceiver; The memory stores a computer program, which the processor executes to enable the terminal to implement the aforementioned indication method for carrier aggregation.

[0010] On the other hand, embodiments of this application provide a network device, which includes a processor, a memory, and a transceiver; The memory stores a computer program, which the processor executes to enable the network device to implement the aforementioned indication method for carrier aggregation.

[0011] In another aspect, embodiments of this application also provide a computer-readable storage medium storing a computer program that is loaded and executed by a processor to implement the above-described indication method for carrier aggregation.

[0012] In another aspect, this application also provides a chip for operation in a communication device to enable the communication device to perform the above-described indication method for carrier aggregation.

[0013] In another aspect, this application provides a computer program product including computer instructions stored in a computer-readable storage medium. A processor of a communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the communication device to perform the aforementioned indication method for carrier aggregation.

[0014] In another aspect, this application provides a computer program that is executed by the processor of a communication device to implement the above-described indication method for carrier aggregation.

[0015] This application provides a scheme for indicating carrier aggregation. During LTM, the terminal can perform L1 measurement on the primary and secondary cells and / or secondary cells associated with the candidate primary cell indicated by the RRC reconfiguration message, and report the L1 measurement report to the network device. The network device then instructs the terminal to add and / or activate the primary and secondary cells and / or secondary cells for carrier aggregation based on the L1 measurement report. In other words, the addition or activation of primary and secondary cells and / or secondary cells for carrier aggregation can be completed during the terminal's cell handover process, thereby greatly shortening the time for the UE to establish multi-carrier CA or DC and improving the efficiency of establishing multi-carrier CA or DC. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the architecture of a communication system provided in one embodiment of this application; Figure 2 This is a general flowchart of an LTM involved in this application; Figure 3 This is a flowchart of an indication method for carrier aggregation provided in one embodiment of this application; Figure 4 This is a flowchart of an indication method for carrier aggregation provided in one embodiment of this application; Figure 5 This is a flowchart of an indication method for carrier aggregation provided in one embodiment of this application; Figure 6 This is a flowchart of a secondary cell addition and activation process involved in this application; Figure 7 This is a schematic diagram of the configuration information involved in this application; Figure 8 This is a flowchart illustrating the process of adding and activating a primary and secondary cell, as described in this application. Figure 9 This is a schematic diagram of the configuration information involved in this application; Figure 10 This is another flowchart for adding and activating a secondary cell involved in this application; Figure 11 This is a schematic diagram of the configuration information involved in this application; Figure 12 This is a block diagram of an indication device for carrier aggregation provided in one embodiment of this application; Figure 13 This is a block diagram of an indication device for carrier aggregation provided in one embodiment of this application; Figure 14 This is a schematic diagram of the structure of a communication device provided in one embodiment of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0018] The network architecture and business scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0019] Figure 1 A schematic diagram of a communication system according to an exemplary embodiment of this application is shown. The communication system includes a network device 110 and a terminal 120, and optionally, may also include a terminal 130, which is not limited in this application.

[0020] The network device 110 in this application provides wireless communication functionality. This network device 110 includes, but is not limited to: an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a Home Evolved Node B (or Home Node B, HNB), a Baseband Unit (BBU), an Access Point (AP) in a Wireless Fidelity (Wi-Fi) system, a wireless relay node, a wireless backhaul node, a Transmission Point (TP), or a Transmission and Reception Point (TRP), etc. It can also support next-generation Node Bs in 5G mobile communication systems. B, gNB) or transmission point (TRP or TP), or, in a 5G system, one or a group of antenna panels (including multiple antenna panels) of a base station, or, network nodes constituting a gNB or transmission point, such as baseband unit (BBU) or distributed unit (DU), or base stations in Beyond Fifth Generation (B5G) or 6th Generation (6G) mobile communication systems, or core network (CN), fronthaul, backhaul, radio access network (RAN), network slicing, etc., or the terminal's serving cell, primary cell (PCell), primary secondary cell (PSCell), special cell (SpCell), secondary cell (SCell), neighboring cell, etc.

[0021] In this application, terminal 120 and / or terminal 130 are also referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user apparatus. This terminal includes, but is not limited to: handheld devices, wearable devices, in-vehicle devices, and IoT devices, such as: mobile phones, tablets, e-readers, laptops, desktop computers, televisions, game consoles, mobile internet devices (MID), augmented reality (AR) terminals, virtual reality (VR) terminals, mixed reality (MR) terminals, wearable devices, controllers, electronic tags, controllers, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, wireless terminals in remote medical surgery, cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, and wireless local loops. Loop (WLL) stations, personal digital assistants (PDAs), set-top boxes (STBs), customer premises equipment (CPEs), etc.

[0022] Network device 110 and terminal 120 communicate with each other through some air interface technology, such as the Uu interface.

[0023] For example, there are two communication scenarios between network device 110 and terminal 120: uplink communication scenario and downlink communication scenario. Uplink communication refers to sending signals to network device 110; downlink communication refers to sending signals to terminal 120.

[0024] Terminal 120 and terminal 130 communicate with each other through some air interface technology, such as the PC5 interface.

[0025] In some embodiments, there are two communication scenarios between terminal 120 and terminal 130: a first side-by-side communication scenario and a second side-by-side communication scenario. The first side-by-side communication refers to sending signals to terminal 130; the second side-by-side communication refers to sending signals to terminal 120.

[0026] Terminal 120 and terminal 130 are both within the network coverage area and located in the same cell, or terminal 120 and terminal 130 are both within the network coverage area but located in different cells, or terminal 120 is within the network coverage area but terminal 130 is outside the network coverage area.

[0027] The technical solutions provided in the embodiments of this application can be applied to various communication systems, such as: Global System for Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5G mobile communication system, New Radio (NR) system, evolution of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, and NR-based access to unlicensed spectrum. This application encompasses unlicensed spectrum (NR-U) systems, terrestrial networks (TN) systems, non-terrestrial networks (NTN) systems, wireless local area networks (WLANs), wireless Fidelity (Wi-Fi), cellular IoT systems, and cellular passive IoT systems. It can also be applied to subsequent evolutions of 5G NR systems, as well as B5G, 6G, and subsequent evolutions. In some embodiments of this application, "NR" may also refer to a 5G NR system or a 5G system. The 5G mobile communication system may include non-standalone (NSA) and / or standalone (SA) networks.

[0028] The technical solutions provided in the embodiments of this application can also be applied to Machine Type Communication (MTC), Long Term Evolution-Machine (LTE-M) technology, Device to Device (D2D) networks, Machine to Machine (M2M) networks, Internet of Things (IoT) networks, or other networks. Among them, IoT networks may include, for example, vehicle-to-everything (V2X) networks. The communication methods in V2X systems are collectively referred to as Vehicle to X (V2X), where X can represent anything. For example, V2X may include: Vehicle to Vehicle (V2V) communication, Vehicle to Infrastructure (V2I) communication, Vehicle to Pedestrian (V2P) communication, or Vehicle to Network (V2N) communication, etc.

[0029] 1) Carrier aggregation Carrier aggregation, by jointly scheduling and utilizing resources on multiple component carriers (CCs), enables NR systems to support greater bandwidth, thereby achieving higher peak system rates. Based on the continuity of the aggregated carriers in the spectrum, it can be divided into continuous carrier aggregation and discontinuous carrier aggregation; based on whether the aggregated carriers occupy the same bandwidth, it can be divided into Intra-band carrier aggregation and Inter-band carrier aggregation.

[0030] There is one and only one Primary Cell Component (PCC). The PCC provides Radio Resource Control (RRC) signaling connections, Non-Access Stratum (NAS) functions, security control, etc. The Physical Uplink Control Channel (PUCCH) exists only on the PCC. The Secondary Cell Component (SCC) only provides additional radio resources. The PCC and SCC are collectively referred to as the serving cell. The standard also specifies that a maximum of 5 aggregated carriers are supported, meaning the maximum bandwidth after aggregation is 100MHz, and the aggregated carriers belong to the same base station. All aggregated carriers use the same Cell-Radio Network Temporary Identifier (C-RNTI), and the base station implementation ensures that the C-RNTI does not conflict in the cell where each carrier resides. Since both asymmetric and symmetric carrier aggregation are supported, the aggregated carriers must have downlink, but uplink is not required. Furthermore, a primary carrier cell must have its own Physical Downlink Control Channel (PDCCH) and PUCCH. Only the primary carrier cell has a PUCCH, while other secondary carrier cells may have a PDCCH.

[0031] 2) SCell (Secondary Cell) activation SCells are configured via dedicated RRC signaling, initially in an inactive state, in which data transmission and reception are disabled. SCells are then activated via the Media Access Control (MAC) control element (CE) to enable data transmission and reception. From the perspective of SCell configuration and activation latency, this architecture is not optimal.

[0032] Activating or deactivating secondary carriers, as well as adding or deleting them, can all lead to transmission interruptions at the UE. Specific requirements are defined in sections 8.2.4.2.1 and 8.2.4.2.2 of 3GPP protocol TS 38.133, including different interruption scenarios caused by secondary carrier activation or deactivation in intra-band and inter-band dual-connectivity (DC) or CA. These are all defined based on the Synchronization Signal / PBCH Block (SSB) signal, including Automatic Gain Control (AGC) settings based on SSB and timing tracking based on SSB.

[0033] 3) L1 / L2 Triggered Mobility (LTM) LTM is a PCell (or PSCell) cell switch procedure that the network triggers via MAC CE based on L1 measurements. LTM (Limited Time Management) is a procedure in which a gNB receives L1 measurement report(s) from a UE, and based on these reports, changes the UE's serving cell by sending a cell switch command signaled via a MAC CE. The cell switch command instructs the gNB to prepare an LTM candidate cell configuration that it has previously prepared and provided to the UE through RRC signaling. The UE then switches to the target cell according to the cell switch command. The LTM procedure can be used to reduce mobility latency. The network may request the UE to perform early TA acquisition of a candidate cell before a cell switch. Early TA acquisition is triggered by a PDCCH command [or through UE-based TA measurement]. RAN1 confirmed the working assumption to support UE-based TA measurement (UE derives TA based on the Rx timing difference between the current serving cell and the candidate cell, as well as the TA value for the current serving cell). If no TA value is provided, the network indicates in the cell switch command whether the UE should access the target cell using a RA procedure or with PUSCH transmission using the indicated TA value. For RACH-less LTM, the UE either monitors the PDCCH for dynamic scheduling from the target cell upon LTM cell switch, or the UE selects the configured grant occasion associated with the beam indicated in the cell switch command. During cell switch decision-making, R2 assumes that the source distributed unit (DU) informs the target DU about the selected beam, allowing the target DU to begin scheduling dynamic UL grants. The following principles apply to LTM: The UE does not update its security key in the LTM. - Subsequent LTM is supported. LTM supports intra-gNB-DU and intra-gNB-CU inter-gNB-DU mobility. LTM also supports inter-frequency mobility, including mobility to inter-frequency cells that are not currently serving cells. It supports the following scenarios: - PCell change in non-CA scenario -PCell change in CA scenario - This applies to dual-connectivity scenarios, at least for PSCell changes that do not involve the master node (MN), i.e., PSCell changes within the secondary node (SN). A supervision timer can be used to detect failures in the LTM cell handover process. If the LTM supervision timer expires, the LTM process fails, and the UE initiates an RRC connection re-establishment procedure. When the UE has stored LTM candidate cell configurations, it can also execute any L3 handover command sent by the network. The network is responsible for preventing any issues arising from conflicts between LTM execution and L3 handover execution, such as avoiding sending LTM cell switch commands and L3 handover commands simultaneously. The cell switch command is transmitted in a MAC CE, which contains the necessary information to perform the LTM cell switch. The overall flowchart of LTM is as follows: Figure 2 As shown in Figure 1, subsequent LTMs are performed by repeating the early synchronization, LTM execution, and LTM completion steps without releasing other LTM candidate cell configurations after each LTM completion. like Figure 2 As shown, the LTM process is as follows: S1, the UE sends a MeasurementReport message to the gNB. The gNB then decides to configure LTM and initiates candidate cell(s) preparation. S2, the gNB sends an RRCReconfiguration message to the UE, including the LTM candidate cell configurations of one or more candidate cells. S3, the UE stores the LTM candidate cell configurations and sends an RRCReconfigurationComplete message to the gNB. S4a, The UE may perform DL synchronization with candidate cells(s) before receiving the cell switch command. SSB enables deep cell(s) synchronization for candidate cells prior to a cell switch command. S4b, the UE may perform early TA acquisition on a candidate cell requested by the network before receiving a cell handover command. This is done via CFRA triggered by a PDCCH command from the source cell, after which the UE sends a preamble to the indicated candidate cell. To minimize data interruption in the source cell due to CFRA on the candidate cell, the UE does not receive RAR for TA value acquisition, and the TA value of the candidate cell is indicated in the cell handover command. The UE does not maintain a TA timer for the candidate cell and relies on the network implementation to guarantee TA validity. (The UE [may]performs early TAacquisition with candidate cell(s) requested by the network before receiving the cell switch command. This is done via CFRA triggered by a PDCCH orderfrom the source cell, following which the UE sends preamble towards the indicated candidate cell. In order to minimize the data interruption of the source cell due to CFRA towards the candidate cell(s), the UE doesn't receiveRAR for the purpose of TA value acquisition and the TA value of the candidatecell is indicated in the cell switch command. The UE doesn't maintain the TAtimer for the candidate cell and relies on network implementation to guarantee the TA validity.) S5, the UE performs L1 measurements on the configured candidate cell(s) and transmits lower-layer measurement reports to the gNB. L1 measurements should be performed as long as the RRC reconfiguration is applied in step S2. S6, the gNB decides to perform a cell switch to the target cell and sends a MAC CE triggering the switch by including the candidate configuration index of the target cell. The UE switches to the target cell and applies the configuration indicated by the candidate configuration index. S7. If the UE does not have a valid TA for the target cell, the UE performs a random access procedure towards the target cell. In step S8, the UE completes the LTM cell switch procedure by sending an RRCReconfigurationComplete message to the target cell. If the UE has already performed a random access (RA) procedure in step S7, the UE considers the LTM execution to be successfully completed when the random access procedure is successfully completed. For RACH-less LTM, the UE considers the LTM execution to be successfully completed when the UE determines that the network has successfully received its first UL data. RAN2 assumes that the RRCReconfigurationComplete message is always sent at each LTM execution. Steps S4-S8 can be performed multiple times for subsequent LTM cell handovers using the LTM candidate cell configuration(s) provided in step S2. Currently, the MAC CE in step S6 can include the Transmission Configuration Indicator (TCI) state, TA, and candidate index. The candidate index refers to the relevant configuration of a candidate cell in the LTM candidate configuration in step S2 (candidate configuration index of the target cell).

[0034] For example, CellgroupConfig is included in RRCReconfiguration, and cellGroupConfig contains spCellConfig, sCellToAddModList, and sCellToReleaseList, which are used to configure PCell and SCell respectively. After receiving the configuration, the UE can use this information to distinguish which configuration is for PCell and which is for SCell.

[0035] UE mobility measurements (such as LTM) primarily evaluate candidate PCells. Subsequent embodiments of this application provide a scheme where the network retains both Pcells and Scells within the same MCG (Main Cell Group) among the candidate cells configured in the RRC reconfiguration. The candidate PCell and candidate Scell ​​are pre-configured and associated (as described above). Figure 2 Step S2) or MACCE indication association (as described above) Figure 2 In step S6), the UE can perform the LTM process (as described above). Figure 2 In step S5), all of these are measured in advance to obtain preliminary evaluation results, in addition to instructing the candidate configuration index to complete the LTM Pcell switching (as mentioned above). Figure 2 After step S8), the addition / activation of the Scell ​​can also be completed simultaneously. This eliminates the need to reissue the Scell-related configuration and perform measurements, thus saving time and significantly reducing the time required for the UE to establish multi-carrier CA or DC.

[0036] Please refer to Figure 3 The document illustrates a flowchart of an indication method for carrier aggregation provided in one embodiment of this application. This method can be executed by a terminal, wherein the terminal can be... Figure 1Terminal 120 in the network architecture shown; the method may include the following steps: Step 301: Receive an RRC reconfiguration message sent by the network device. The RRC reconfiguration message carries LTM candidate configuration information, which is used to indicate the configuration of the candidate primary cell.

[0037] The aforementioned RRC reconfiguration message can be an RRC message sent by the network device after the terminal sends a Measurement Report message to the network device, and the network device decides to configure LTM and trigger candidate cell preparation based on the report.

[0038] Among them, the aforementioned RRC reconfiguration message can at least indicate the configuration of the candidate primary cell.

[0039] Step 302: Perform L1 measurement on the candidate primary cell, as well as the primary and / or secondary cells associated with the candidate primary cell, and obtain an L1 measurement report.

[0040] In this embodiment of the application, during the LTM process, in addition to performing L1 measurements on the candidate primary cell, the terminal can also perform L1 measurements on the primary and secondary cells and / or secondary cells associated with the candidate primary cell.

[0041] Step 303: Submit the L1 measurement report to the network device.

[0042] Step 304: Receive first indication information sent by the network device according to the L1 measurement report; the first indication information is used to instruct the terminal to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation.

[0043] In this embodiment of the application, when the network device determines to instruct the terminal to perform cell handover based on the L1 measurement report, it can also send first instruction information based on the L1 measurement report to instruct the terminal to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation.

[0044] In summary, the solution shown in this application embodiment allows the terminal to perform L1 measurements on the primary and secondary cells and / or secondary cells associated with the candidate primary cell indicated by the RRC reconfiguration message during the LTM process, and report the L1 measurement report to the network device. The network device then instructs the terminal to add and / or activate the primary and secondary cells and / or secondary cells for carrier aggregation based on the L1 measurement report. In other words, the addition or activation of primary and secondary cells and / or secondary cells for carrier aggregation can be completed during the terminal's cell handover process, thereby greatly shortening the time for the UE to establish multi-carrier CA or DC and improving the efficiency of establishing multi-carrier CA or DC.

[0045] Please refer to Figure 4The diagram illustrates a flowchart of an indication method for carrier aggregation provided in one embodiment of this application. This method can be executed by a network device, wherein the network device can be... Figure 1 The network device 110 in the network architecture shown; the method may include the following steps: Step 401: Send an RRC reconfiguration message to the terminal. The RRC reconfiguration message carries LTM candidate configuration information, which indicates the configuration of the candidate primary cell.

[0046] Step 402: Receive the L1 measurement report reported by the terminal, which is obtained by performing L1 measurements on the candidate primary cell and the primary and / or secondary cells associated with the candidate primary cell.

[0047] Step 403: Send first instruction information to the terminal based on the L1 measurement report; the first instruction information is used to instruct the terminal to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation.

[0048] In summary, the solution shown in this application embodiment allows the terminal to perform L1 measurements on the primary and secondary cells and / or secondary cells associated with the candidate primary cell indicated by the RRC reconfiguration message during the LTM process, and report the L1 measurement report to the network device. The network device then instructs the terminal to add and / or activate the primary and secondary cells and / or secondary cells for carrier aggregation based on the L1 measurement report. In other words, the addition or activation of primary and secondary cells and / or secondary cells for carrier aggregation can be completed during the terminal's cell handover process, thereby greatly shortening the time for the UE to establish multi-carrier CA or DC and improving the efficiency of establishing multi-carrier CA or DC.

[0049] based on Figure 3 and Figure 4 Please refer to the embodiments shown. Figure 5 The document illustrates a flowchart of an indication method for carrier aggregation provided in one embodiment of this application. This method can be interactively executed by a terminal and a network device, wherein the network device can be... Figure 1 In the network architecture shown, network device 110, the aforementioned terminal can be... Figure 1 Terminal 120 in the network architecture shown; the method may include the following steps: Step 501: The network device sends an RRC reconfiguration message to the terminal, and the terminal receives the RRC reconfiguration message. The RRC reconfiguration message carries LTM candidate configuration information, which is used to indicate the configuration of the candidate primary cell.

[0050] The aforementioned RRC reconfiguration message can be an RRC reconfiguration message sent by the network device to the terminal during the LTM process.

[0051] For example, a terminal can report a measurement report to a network device. Then, if the network device decides to configure LTM and trigger candidate cell preparation based on the report, it can send the aforementioned RRC reconfiguration message to the terminal.

[0052] The aforementioned RRC reconfiguration message is used to configure LTM candidate configuration information for the terminal, instructing the terminal to perform L1 measurements subsequently, so that the network device can trigger the terminal to perform cell handover based on the terminal's L1 measurement results.

[0053] In some embodiments, the LTM candidate configuration information includes one or more LTM candidate cell configurations.

[0054] In this application embodiment, the network device (such as gNB) sends an RRCReconfiguration message to the UE, which includes at least one or more LTM candidate cell configurations (indexes that can be associated with different cells) to instruct the terminal to perform subsequent L1 measurements.

[0055] In some embodiments, the candidate cell configuration includes one or more of the following configurations: The measurement configuration of the candidate primary cell can be used by the terminal to measure the candidate primary cell; The measurement configuration of candidate primary and secondary cells can be used by the terminal to measure the candidate primary and secondary cells corresponding to the candidate primary cell; The measurement configuration of the secondary cell associated with the candidate primary cell can be used by the terminal to measure the secondary cell associated with the candidate primary cell; The measurement configuration of the secondary cell associated with the candidate primary and secondary cell can be used by the terminal to measure the secondary cell associated with the candidate primary and secondary cell.

[0056] After receiving the RRC reconfiguration message, the terminal can perform downlink synchronization with the candidate primary cell; and / or, perform downlink synchronization with the candidate primary and secondary cells.

[0057] Step 502: The terminal performs L1 measurement on the candidate primary cell, as well as the primary and secondary cells and / or secondary cells associated with the candidate primary cell, and obtains an L1 measurement report.

[0058] In some embodiments, the terminal can perform L1 measurements on the candidate primary cell, as well as the primary and secondary cells and / or secondary cells associated with the candidate primary cell, according to the measurement configuration in the candidate cell configuration, and obtain an L1 measurement report.

[0059] For example, for each candidate cell configuration, the terminal sequentially performs L1 measurements on the candidate primary cell in the candidate cell configuration, as well as the primary and secondary cells and / or secondary cells associated with the candidate primary cell.

[0060] Step 503: The terminal reports the L1 measurement report to the network device, and the network device receives the L1 measurement report reported by the terminal.

[0061] The terminal can report L1 measurement results through lower-layer measurement reports. Unlike L3 reports, L1 measurement reports can be carried in L1 (such as Physical Uplink Shared Channel (PUSCH) or Uplink Control Information (UCI)) or MAC CE.

[0062] Step 504: The network device sends a first instruction information to the terminal based on the L1 measurement report, and the terminal receives the first instruction information sent by the network device based on the L1 measurement report; the first instruction information is used to instruct the terminal to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation.

[0063] In some embodiments, when the network device determines, based on the L1 measurement report, to instruct the terminal to switch to the target cell, it may simultaneously instruct the terminal to add and / or activate the primary and secondary cells and / or secondary cells for carrier aggregation. Here, adding and / or activating the primary and secondary cells and / or secondary cells for carrier aggregation may refer to adding and / or activating the primary cell and / or secondary cells for carrier aggregation in the corresponding primary cell after the terminal switches (such as the target cell mentioned above).

[0064] In some embodiments, the association between the terminal's primary cell and the primary / secondary cells and / or secondary cells used for carrier aggregation is indicated by association information; The associated information is configured by the first indication information; or, the associated information is configured by the RRC reconfiguration message and the first indication information indicates that it is effective.

[0065] The association between the primary and secondary cells and / or secondary cells used for carrier aggregation and the corresponding primary cell can be indicated or configured by the network device when instructing the terminal to switch to the target cell. That is, the primary and secondary cells and / or secondary cells associated with the terminal's primary cell after the terminal cell switch are indicated or configured by the first indication information.

[0066] Alternatively, the association between the primary and secondary cells and / or secondary cells used for carrier aggregation and the corresponding primary cell can also be indicated by the network device when sending the RRC reconfiguration message. That is, when sending the RRC reconfiguration message, the network device can configure the associated primary and secondary cells and / or secondary cells for each candidate primary cell.

[0067] In some embodiments, the associated information includes one or more of the following: Identification information of primary and secondary cells associated with the primary cell, identification information of secondary cells associated with the primary cell, and identification information of secondary cells associated with the primary and secondary cells.

[0068] For example, when the primary and secondary cells and / or secondary cells configured for carrier aggregation include primary and secondary cells, the above-mentioned association information may include the identification information of the primary and secondary cells, such as the cell index of the primary and secondary cells, and the identification information of the primary and secondary cells is associated with the identification information of the primary cell (which may also be called the candidate primary cell when configured through RRC reconfiguration messages).

[0069] For example, when the primary and secondary cells configured for carrier aggregation include secondary cells, the aforementioned association information may include the identification information of the secondary cells, such as the index, ID, or group ID of the secondary cells, and the identification information of the secondary cells is associated with the identification information of the primary cell or the identification information of the primary and secondary cells.

[0070] In some embodiments, where the association information is configured by an RRC reconfiguration message and indicated to be effective by a first indication message, the first indication message includes a control indication. When the value of the control indication is true, the first indication information is used to indicate the addition and / or activation of the primary and secondary cells and / or secondary cells associated with the primary cell.

[0071] In some embodiments, when the value of the control indication is false, the first indication information is used to indicate that the primary and / or secondary cells associated with the primary cell are not added and / or activated.

[0072] In this scenario, where the association information is configured by the RRC reconfiguration message and indicated to be effective by the first indication information, the RRC reconfiguration message may carry association information. Each association information corresponds to a candidate primary cell and the primary and / or secondary cells associated with the candidate primary cell. In step 504, when the network device determines that the terminal should switch to a certain primary cell, it may carry the identification information (such as an index) of the primary cell in the first indication information. Simultaneously, the network device may also carry a control indication in the first indication information to control whether to add and / or activate the primary and secondary cells associated with the primary cell for carrier aggregation. For example, if the network device, based on L1 measurement results... If it is determined that the primary and secondary cells and / or secondary cells associated with the primary cell for carrier aggregation need to be added and / or activated, for example, if the signal quality of the primary and secondary cells and / or secondary cells associated with the primary cell for carrier aggregation meets the requirements for addition and / or activation, then the value of the control indication carried in the first indication information is true. Conversely, if the network device determines, based on the L1 measurement results, that the primary and secondary cells and / or secondary cells associated with the primary cell for carrier aggregation do not need to be added and / or activated, for example, if the signal quality of the primary and secondary cells and / or secondary cells associated with the primary cell for carrier aggregation does not meet the requirements for addition and / or activation, then the value of the control indication carried in the first indication information is false.

[0073] Optionally, the values ​​of the control indications described above can also be replaced with other types of values. For example, true can be replaced with 1, and false can be replaced with 0; or, true can be replaced with 0, and false can be replaced with 1. This application embodiment does not limit the type of the control indication values.

[0074] Step 505: The terminal adds and / or activates primary and secondary cells and / or secondary cells for carrier aggregation according to the first instruction information.

[0075] Specifically, when the first indication information indicates the addition and / or activation of primary and secondary cells and / or secondary cells for carrier aggregation, the terminal can add the cell indicated by the first indication information as a secondary cell and / or primary and secondary cell of the primary cell after the handover.

[0076] In some embodiments, when the first indication information is used to instruct the terminal to add and / or activate the primary and secondary cells, and the terminal has completed downlink synchronization with the primary and secondary cells, the primary and secondary cells for carrier aggregation are added and / or activated. If the first indication information is used to instruct the terminal to add and / or activate the primary and secondary cells, and the terminal has not completed downlink synchronization with the primary and secondary cells, the terminal initiates random access to the primary and secondary cells. After the random access is completed, the terminal adds and / or activates the primary and secondary cells for carrier aggregation.

[0077] For primary and secondary cells, since the terminal needs to perform downlink synchronization with the primary and secondary cells, if the terminal has already completed synchronization with the primary and secondary cells before adding them (e.g., before step 502), the terminal can directly add and / or activate the primary and secondary cells. If synchronization with the primary and secondary cells has not yet been completed, the terminal can initiate random access to the primary and secondary cells, and then add and / or activate the primary and secondary cells after the random access is completed.

[0078] Step 506: After successfully adding and / or activating the primary and secondary cells and / or secondary cells for carrier aggregation, the terminal sends a Channel Status Indicator (CSI) report to the network device.

[0079] For example, after successfully adding and / or activating primary and secondary cells and / or secondary cells for carrier aggregation, the terminal can generate CSI reports corresponding to the primary and secondary cells and / or secondary cells and report them to the network equipment.

[0080] Step 507: Upon receiving the CSI report from the terminal, the network device determines that the terminal has successfully added or activated the primary and secondary cells and / or secondary cells for carrier aggregation.

[0081] For example, if a network device receives a CSI report from a terminal corresponding to a primary and secondary cell and / or a secondary cell, it can be considered that the terminal has successfully added or activated the aforementioned primary and secondary cells and / or secondary cells.

[0082] The embodiments described above in this application provide an LTM-based Scell ​​addition / activation process, which also includes two configuration-related enhancement features: 1) Enhanced RRC reconfiguration: Establishes the association between the configuration of candidate Pcell and SCell and the configuration index in the LTM switch command; that is, establishes the association between the configuration of candidate primary / secondary cells and the configuration index in the LTM handover command. 2) Enhanced LTM switch command MAC CE, introducing the function of Scell ​​addition and activationdirectly (LTM handover command directly adds and activates secondary cells).

[0083] The LTM-based Scell ​​addition / activation process can be divided into three cases: the addition and / or activation of a secondary cell associated with the primary cell, the addition and / or activation of a primary and secondary cell, and the addition and / or activation of a secondary cell associated with a primary and secondary cell. These three cases will be introduced below.

[0084] I. MCG Scell ​​addition / activation based on LTM measurement Please refer to Figure 6 The diagram illustrates a process for adding and activating a secondary cell, as described in this application. Figure 6 As shown, the process for adding and / or activating secondary cells in a primary cell group based on LTM measurements may include the following steps: S1, the UE sends a MeasurementReport message to the gNB. The gNB decides to configure LTM and trigger candidate cell preparation.

[0085] S2, gNB sends an RRCReconfiguration message to the UE, which includes at least one or more LTM candidate cell configurations (which may be associated with different indexes).

[0086] For example, multiple candidate cells are grouped, with cell 1 associated with cell 2 / 3 and cell 4 associated with cell 5 / 6. Cells 1 and 4 are candidate Pcells, and cells 2 / 3 and 5 / 6 are their secondary carriers, all of which are secondary carriers under the MCG.

[0087] S3, the UE stores the LTM candidate cell configuration and sends an RRCReconfigurationComplete message to the gNB.

[0088] S4a, Optionally, the UE performs downlink synchronization with candidate cell(s), which includes at least DL synchronization with candidate Pcells. Optionally, the UE performs early TA acquisition with candidate cell(s), where the network configures which cells and TAs are used. This can be contention-free random access (CFRA) triggered by the source cell's PDCCH orderer, with the TA value of the candidate cell indicated in the cell switch command.

[0089] In S5, the UE performs L1 measurements of the configured candidate cells and sends measurement reports to the gNB (lower-layer measurement reports, which, unlike L3 reports, can be carried in L1 (such as PUSCH or UCI) or MAC CE). L1 measurements should be performed according to the RRC reconfiguration requirements in S2.

[0090] Among them, the measurement configuration of the Scell ​​associated with the candidate target cell is retained in the candidate cell configuration, and the measurement is performed in advance to obtain preliminary evaluation results.

[0091] In step S6, the gNB decides to perform a cell handover to the target cell and sends a MAC CE for the handover (including at least the candidate configuration index of the target cell). The UE hands over to the target cell, and the configuration associated with the candidate configuration index takes effect, including at least: SPCellconfig and Scell ​​to add Mod list. A diagram illustrating the above configuration information can be seen as follows: Figure 7 As shown.

[0092] In addition to indicating the configuration index of the candidate Pcell, the MAC CE can also carry the index of the candidate Scell, used for adding / activating the Scell ​​associated with the candidate Pcell. The Scell ​​index can also be empty, indicating that there is no matching secondary cell for activation or that the secondary cell is not activated.

[0093] Alternatively, in addition to indicating the configuration index of the candidate Pcell, the MAC CE can also carry an indication of whether to add / activate the LTM Scell. If the measurement results of the Scell ​​associated with the candidate Pcell also meet the conditions (such as meeting accuracy and measurement thresholds), the LTM Scell ​​addition / activation indication is true; otherwise, it is false.

[0094] S7, Optionally, if the UE does not obtain a valid TA for the target cell, the UE initiates random access to the target cell.

[0095] In S8, the UE completes the LTM cell switch and sends an RRCReconfigurationComplete message to the target cell. If the UE executes the random access procedure in S7 successfully, the UE considers the LTM to be successfully completed. For RACH-less LTM, the UE considers the LTM to be successfully completed when the network successfully receives the first uplink data message.

[0096] If the MAC CE in step S6 indicates the addition / activation of the Scell ​​associated with the candidate Pcell, such as if the Scell ​​configuration index / Scell ​​index is configured, and / or the LTM Scell ​​addition / activation indication is true, then the UE initiates the Scell ​​addition / activation, skipping the synchronization, measurement, and reporting processes. When the UE sends a CSI report, it is considered that the Scell ​​has been added / activated.

[0097] II. SCG addition / activation based on LTM measurement Please refer to Figure 8 It illustrates a flowchart of a primary and secondary cell addition and activation process related to this application. For example... Figure 8 As shown, the process for adding and / or activating primary and secondary cells in a secondary cell group based on LTM measurements may include the following steps: S1, the UE sends a MeasurementReport message to the gNB. The gNB then decides to configure LTM and trigger candidate cell preparation.

[0098] S2, gNB sends an RRCReconfiguration message to the UE, which includes at least one or more LTM candidate cell configurations (which may be associated with different indexes).

[0099] For example, a candidate cell may include at least two candidates, one of which is candidate PCell and the other is candidate PScell.

[0100] S3, the UE stores the LTM candidate cell configuration and sends an RRCReconfigurationComplete message to the gNB.

[0101] S4a, Optionally, the UE performs downlink synchronization (DL synchronization with candidate cell(s)), which includes at least DL synchronization of candidate Pcell and / or candidate PScell. Optionally, the UE performs early TA acquisition (early TA acquisition with candidate cell(s), where the network configures which cells and TAs). CFRA can be triggered by the source cell's PDCCH orderer, and the TA value of the candidate cell is indicated in the cell switch command.

[0102] In S5, the UE performs L1 measurements of the configured candidate cells and sends measurement reports to the gNB (lower-layer measurement reports, which, unlike L3 reports, can be carried in L1 (such as PUSCH or UCI) or MAC CE). L1 measurements should be performed according to the RRC reconfiguration requirements in S2.

[0103] Among them, the measurement configuration of candidate target Pcell and target PScell ​​is retained in the candidate cell configuration to conduct measurements in advance and obtain preliminary evaluation results.

[0104] S6, the gNB decides to perform a cell handover to the target cell (target Pcell) and sends a MAC CE for the cell handover (including at least the candidate configuration index of the target cell). The UE hands over to the target cell, and the configuration associated with the candidate configuration index takes effect, which includes at least: SPCellconfig. A diagram illustrating the above configuration information can be seen as follows... Figure 9 As shown.

[0105] In addition to indicating the configuration index of the candidate Pcell, the MAC CE can also carry the index of the candidate PScell ​​for adding / activating the SCG associated with the candidate Pcell.

[0106] Alternatively, in addition to indicating the candidate Pcell's configuration index, the MAC CE can also carry an indication of whether to add / activate the LTM PScell. If the measurement results of the Scell ​​associated with the candidate PScell ​​also meet the conditions, the LTM PScell ​​addition / activation indication is true; otherwise, it is false.

[0107] S7, Optionally, if the UE does not obtain a valid TA for the target cell, the UE initiates random access to the target cell.

[0108] In S8, the UE completes the LTM cell switch and sends an RRCReconfigurationComplete message to the target cell. If the UE executes the random access procedure in S7 successfully, the UE considers LTM to be successfully completed. For RACH-less LTM, the UE considers LTM to be successfully completed when the network successfully receives the first uplink data message.

[0109] If the MAC CE in S6 indicates the addition / activation of the Scell ​​associated with the candidate Pcell, and if the Scell ​​configuration index / Scell ​​index is configured, and / or the LTM Scell ​​addition / activation indication is true, then the UE initiates PScell ​​addition / activation. If the PScell ​​has already completed DL synchronization in S4, the UE sends a CSI report indicating that the Scell ​​has been added / activated. Otherwise, the RACH procedure on the PScell ​​needs to be executed, and the addition / activation is completed after synchronization.

[0110] III. Addition / Activation of Multiple Scells Based on LTM Measurement Please refer to Figure 10 This illustrates another auxiliary cell addition and activation flowchart related to this application. For example... Figure 10 As shown, the process for adding and / or activating secondary cells in a secondary cell group based on LTM measurements may include the following steps: S1, the UE sends a MeasurementReport message to the gNB. The gNB then decides to configure LTM and trigger candidate cell preparation.

[0111] S2, gNB sends an RRCReconfiguration message to the UE, which includes at least one or more LTM candidate cell configurations (which can be associated with different indexes).

[0112] For example, multiple candidate cells include at least one candidate PCcell and multiple candidate Scells. A candidate Scell ​​can be associated with a candidate Pcell or PScell.

[0113] S3, the UE stores the LTM candidate cell configuration and sends an RRCReconfigurationComplete message to the gNB.

[0114] S4a, Optionally, the UE performs downlink synchronization (DL synchronization with candidate cell(s)), which includes at least DL synchronization of candidate Pcell and / or candidate PScell. Optionally, the UE performs early TA acquisition (early TA acquisition with candidate cell(s), where the network configures which cells and TAs). CFRA can be triggered by the source cell's PDCCH orderer, and the TA value of the candidate cell is indicated in the cell switch command.

[0115] In S5, the UE performs L1 measurements of the configured candidate cells and sends measurement reports to the gNB (lower-layer measurement reports, which, unlike L3 reports, can be carried in L1 (such as PUSCH or UCI) or MAC CE). L1 measurements should be performed according to the RRC reconfiguration requirements in S2.

[0116] Among them, the measurement configuration of candidate target Pcell, PScell ​​and associated Scells is retained in the candidate cell configuration to measure in advance and obtain preliminary evaluation results.

[0117] S6, the gNB decides to perform a cell handover to the target cell (target Pcell) and sends a MAC CE for the cell handover (including at least the candidate configuration index of the target cell). The UE hands over to the target cell, and the configuration associated with the candidate configuration index takes effect, which includes at least: Cellgourpconfig, SPCellconfig, and Scelltoaddmodlist. A diagram illustrating the above configuration information can be seen as follows: Figure 11 As shown.

[0118] In addition to indicating the configuration index of the candidate Pcell, the MAC CE can also carry the index of the candidate PScell, and / or multiple cell IDs or group IDs of the Scells associated with the candidate PCell or PScell, for adding / activating multiple Scells.

[0119] Alternatively, the MAC CE can also carry an indication of whether to allow the addition / activation of Scells for LTM PCell or PScell ​​associated groups. If the Scells of an associated group are eligible, the LTM PScell ​​addition / activation indication is true; otherwise, it is false.

[0120] S7, Optionally, if the UE does not obtain a valid TA for the target cell, the UE initiates random access to the target cell.

[0121] In S8, the UE completes the LTM cell switch and sends an RRCReconfigurationComplete message to the target cell. If the UE executes the random access procedure in S7 successfully, the UE considers LTM to be successfully completed. For RACH-less LTM, the UE considers LTM to be successfully completed when the network successfully receives the first uplink data message.

[0122] If the MAC CE in S6 indicates a groupID and / or indicates true, the UE will initiate multiple Scell ​​additions / activations. The UE only needs to complete this process within a certain timeframe, and the maximum time for multiple Scell ​​additions / activations is the sum of the times for each individual Scell.

[0123] Please refer to Figure 12 The diagram illustrates a block diagram of an indicating device for carrier aggregation according to an embodiment of this application. This device has the following features: Figure 3 or Figure 5 The method shown describes the functions performed by the terminal. For example... Figure 12 As shown, the device may include: The receiving module 1201 is used to receive an RRC reconfiguration message sent by a network device. The RRC reconfiguration message is used to carry LTM candidate configuration information, which is used to indicate the configuration of the candidate primary cell. The measurement module 1202 is used to perform L1 measurement on the candidate primary cell, as well as the primary and secondary cells and / or secondary cells associated with the candidate primary cell, and obtain an L1 measurement report; The sending module 1203 is used to report the L1 measurement report to the network device; The receiving module 1201 is further configured to receive first indication information sent by the network device according to the L1 measurement report; the first indication information is used to instruct the terminal to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation.

[0124] In some embodiments, the association relationship between the terminal's primary cell and the primary / secondary cells and / or secondary cells used for carrier aggregation is indicated by association information; The associated information is configured by the first indication information; or, The associated information is configured by the RRC reconfiguration message and is indicated to take effect by the first indication information.

[0125] In some embodiments, the associated information includes one or more of the following: The identification information of the primary and secondary cells associated with the primary cell, the identification information of the secondary cells associated with the primary cell, and the identification information of the secondary cells associated with the primary and secondary cells.

[0126] In some embodiments, when the associated information is configured by the RRC reconfiguration message and indicated to be effective by the first indication information, the first indication information includes a control indication; When the value of the control indication is true, the first indication information is used to indicate the addition and / or activation of primary and secondary cells and / or secondary cells associated with the primary cell.

[0127] In some embodiments, when the value of the control indication is false, the first indication information is used to indicate that primary and / or secondary cells associated with the primary cell are not added and / or activated.

[0128] In some embodiments, the LTM candidate configuration information includes one or more LTM candidate cell configurations.

[0129] In some embodiments, the candidate cell configuration includes one or more of the following configurations: Measurement configuration for candidate primary cells; Measurement configuration for candidate primary and secondary cells; Measurement configuration of secondary cells associated with the candidate primary cell; Measurement configuration of the auxiliary cell associated with the candidate primary and secondary cells.

[0130] In some embodiments, the measurement module 1202 is configured to perform L1 measurements on the candidate primary cell and the primary and / or secondary cells associated with the candidate primary cell according to the measurement configuration in the candidate cell configuration, and obtain the L1 measurement report.

[0131] In some embodiments, the apparatus further includes: a synchronization module, for, Perform downlink synchronization with the candidate primary cell; And / or, perform downlink synchronization with the candidate primary and secondary cells.

[0132] In some embodiments, the apparatus further includes: An activation module is added to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation according to the first indication information.

[0133] In some embodiments, the transmitting module 1203 is further configured to send a Channel State Indication (CSI) report to the network device after successfully adding and / or activating the primary and secondary cells and / or secondary cells for carrier aggregation.

[0134] In some embodiments, the addition of the activation module is used for, When the first indication information is used to instruct the terminal to add and / or activate the primary and secondary cells, and the terminal has completed downlink synchronization with the primary and secondary cells, the primary and secondary cells for carrier aggregation are added and / or activated. If the first indication information is used to instruct the terminal to add and / or activate a primary and secondary cell, and the terminal has not completed downlink synchronization with the primary and secondary cell, the terminal initiates random access to the primary and secondary cell. After the random access is completed, the terminal adds and / or activates the primary and secondary cell for carrier aggregation.

[0135] Please refer to Figure 13 The diagram illustrates a block diagram of an indicating device for carrier aggregation according to an embodiment of this application. This device has the following features: Figure 4 or Figure 5 The function shown is performed by the network device in the method described. For example... Figure 13 As shown, the device may include: The sending module 1301 is used to send an RRC reconfiguration message to the terminal. The RRC reconfiguration message is used to carry LTM candidate configuration information, which is used to indicate the configuration of the candidate primary cell. The receiving module 1302 is used to receive the L1 measurement report reported by the terminal, which is obtained by performing L1 measurements on the candidate primary cell and the primary and / or secondary cells associated with the candidate primary cell. The transmitting module 1301 is further configured to transmit first indication information to the terminal according to the L1 measurement report; the first indication information is used to instruct the terminal to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation.

[0136] In some embodiments, the association relationship between the terminal's primary cell and the primary / secondary cells and / or secondary cells used for carrier aggregation is indicated by association information; The associated information is configured by the first indication information; or, The associated information is configured by the RRC reconfiguration message and is indicated to take effect by the first indication information.

[0137] In some embodiments, the associated information includes one or more of the following: The identification information of the primary and secondary cells associated with the primary cell, the identification information of the secondary cells associated with the primary cell, and the identification information of the secondary cells associated with the primary and secondary cells.

[0138] In some embodiments, when the associated information is configured by the RRC reconfiguration message and indicated to be effective by the first indication information, the first indication information includes a control indication; When the value of the control indication is true, the first indication information is used to indicate the addition and / or activation of primary and secondary cells and / or secondary cells associated with the primary cell.

[0139] In some embodiments, when the value of the control indication is false, the first indication information is used to indicate that primary and / or secondary cells associated with the primary cell are not added and / or activated.

[0140] In some embodiments, the LTM candidate configuration information includes one or more LTM candidate cell configurations.

[0141] In some embodiments, the candidate cell configuration includes one or more of the following configurations: Measurement configuration for candidate primary cells; Measurement configuration for candidate primary and secondary cells; Measurement configuration of secondary cells associated with the candidate primary cell; Measurement configuration of the auxiliary cell associated with the candidate primary and secondary cells.

[0142] In some embodiments, the apparatus further includes: The determination module is used to determine, upon receiving a CSI report from the terminal, that the terminal has successfully added or activated a primary and secondary cell and / or a secondary cell for carrier aggregation.

[0143] It should be noted that the device provided in the above embodiments is only illustrated by the division of the above functional modules when implementing its functions. In actual applications, the above functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0144] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0145] Please refer to Figure 14 The diagram illustrates the structure of a communication device 1400 according to an embodiment of this application. The communication device 1400 may include: a processor 1401, a receiver 1402, a transmitter 1403, a memory 1404, and a bus 1405.

[0146] The processor 1401 includes one or more processing cores, and the processor 1401 executes various functional applications and information processing by running software programs and modules.

[0147] The receiver 1402 and transmitter 1403 can be implemented as a communication component, which can be a communication chip. This communication chip can also be called a transceiver. The memory 1404 is connected to the processor 1401 via a bus 1405. The memory 1404 can be used to store computer programs, and the processor 1401 can be used to execute these computer programs to implement the various steps in the above method embodiments.

[0148] Furthermore, the memory 1404 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory, erasable programmable read-only memory, static on-demand memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0149] In one exemplary embodiment, when the communication device 1400 is implemented as the aforementioned terminal, the receiver 1402 and the processor 1401 execute the computer program to enable the communication device to perform... Figure 3 or Figure 5 Each step in any of the methods shown is performed by the terminal.

[0150] In one exemplary embodiment, when the communication device 1400 is implemented as the aforementioned network device, the transmitter 1403 and the processor 1401 execute the computer program to enable the communication device to implement... Figure 4 or Figure 5 Each step in any of the methods shown is performed by the network device.

[0151] This application also provides a computer-readable storage medium storing a computer program, which is loaded and executed by a processor to implement the above-described embodiments. Figure 3 , Figure 4 or Figure 5 The steps shown are all or part of the steps performed by a terminal or network device.

[0152] This application also provides a chip comprising programmable logic circuitry and / or program instructions, the chip being used to operate in a communication device to cause the communication device to perform the aforementioned... Figure 3 , Figure 4 or Figure 5 The steps shown are all or part of the steps performed by a terminal or network device.

[0153] This application also provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the communication device to perform the aforementioned actions. Figure 3 , Figure 4 or Figure 5 The steps shown are all or part of the steps performed by a terminal or network device.

[0154] This application also provides a computer program that is executed by the processor of a communication device to implement the above. Figure 3 , Figure 4 or Figure 5 The steps shown are all or part of the steps performed by a terminal or network device.

[0155] Those skilled in the art will recognize that the functions described in the embodiments of this application in one or more of the above examples can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0156] The above description is merely an exemplary embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for indicating carrier aggregation, characterized in that, The method is executed by a terminal, and the method includes: Receive an RRC reconfiguration message sent by a network device, wherein the RRC reconfiguration message is used to carry LTM candidate configuration information, and the LTM candidate configuration information is used to indicate the configuration of the candidate primary cell; L1 measurement is performed on the candidate primary cell, as well as the primary and / or secondary cells associated with the candidate primary cell, and an L1 measurement report is obtained; The L1 measurement report is then submitted to the network device. The terminal receives a first indication message sent by the network device based on the L1 measurement report; the first indication message is used to instruct the terminal to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation.

2. The method according to claim 1, characterized in that, The association relationship between the terminal's primary cell and the primary / secondary cells and / or secondary cells used for carrier aggregation is indicated by association information; The associated information is configured by the first indication information; or, The associated information is configured by the RRC reconfiguration message and is indicated to take effect by the first indication information.

3. The method according to claim 2, characterized in that, The associated information includes one or more of the following: The identification information of the primary and secondary cells associated with the primary cell, the identification information of the secondary cells associated with the primary cell, and the identification information of the secondary cells associated with the primary and secondary cells.

4. The method according to claim 2 or 3, characterized in that, When the associated information is configured by the RRC reconfiguration message and indicated to be effective by the first indication information, the first indication information includes a control indication; When the value of the control indication is true, the first indication information is used to indicate the addition and / or activation of primary and secondary cells and / or secondary cells associated with the primary cell.

5. The method according to any one of claims 1 to 4, characterized in that, The LTM candidate configuration information includes one or more LTM candidate cell configurations.

6. The method according to claim 5, characterized in that, The candidate cell configuration includes one or more of the following configurations: Measurement configuration for candidate primary cells; Measurement configuration for candidate primary and secondary cells; Measurement configuration of secondary cells associated with the candidate primary cell; Measurement configuration of the auxiliary cell associated with the candidate primary and secondary cells.

7. The method according to any one of claims 1 to 6, characterized in that, The method further includes: Based on the first instruction information, add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation; The step of adding and / or activating primary and secondary cells and / or secondary cells for carrier aggregation according to the first indication information includes: When the first indication information is used to instruct the terminal to add and / or activate the primary and secondary cells, and the terminal has completed downlink synchronization with the primary and secondary cells, the primary and secondary cells for carrier aggregation are added and / or activated. If the first indication information is used to instruct the terminal to add and / or activate a primary and secondary cell, and the terminal has not completed downlink synchronization with the primary and secondary cell, the terminal initiates random access to the primary and secondary cell. After the random access is completed, the terminal adds and / or activates the primary and secondary cell for carrier aggregation.

8. The method according to any one of claims 1 to 7, characterized in that, The method further includes: Before receiving the RRC reconfiguration message sent by the network device, a measurement report message is sent to the network device.

9. The method according to any one of claims 1 to 8, characterized in that, The method further includes: After receiving the RRC reconfiguration message sent by the network device, the LTM candidate configuration information is stored, and an RRC reconfiguration completion message is sent to the network device.

10. A method for indicating carrier aggregation, characterized in that, The method is performed by a network device, and the method includes: Send an RRC reconfiguration message to the terminal. The RRC reconfiguration message is used to carry LTM candidate configuration information, which is used to indicate the configuration of the candidate primary cell. Receive the L1 measurement report reported by the terminal, which is obtained by performing L1 measurements on the candidate primary cell and the primary and / or secondary cells associated with the candidate primary cell; The terminal is sent a first instruction message according to the L1 measurement report; the first instruction message is used to instruct the terminal to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation.

11. The method according to claim 10, characterized in that, The association relationship between the terminal's primary cell and the primary / secondary cells and / or secondary cells used for carrier aggregation is indicated by association information; The associated information is configured by the first indication information; or, The associated information is configured by the RRC reconfiguration message and is indicated to take effect by the first indication information.

12. The method according to claim 11, characterized in that, The associated information includes one or more of the following: The identification information of the primary and secondary cells associated with the primary cell, the identification information of the secondary cells associated with the primary cell, and the identification information of the secondary cells associated with the primary and secondary cells.

13. The method according to claim 11 or 12, characterized in that, When the associated information is configured by the RRC reconfiguration message and indicated to be effective by the first indication information, the first indication information includes a control indication; When the value of the control indication is true, the first indication information is used to indicate the addition and / or activation of primary and secondary cells and / or secondary cells associated with the primary cell.

14. The method according to any one of claims 10 to 13, characterized in that, The LTM candidate configuration information includes one or more LTM candidate cell configurations.

15. The method according to claim 14, characterized in that, The candidate cell configuration includes one or more of the following configurations: Measurement configuration for candidate primary cells; Measurement configuration for candidate primary and secondary cells; Measurement configuration of secondary cells associated with the candidate primary cell; Measurement configuration of the auxiliary cell associated with the candidate primary and secondary cells.

16. The method according to any one of claims 10 to 15, characterized in that, The method further includes: Upon receiving the CSI report from the terminal, it is determined that the terminal has successfully added or activated the primary and secondary cells and / or secondary cells for carrier aggregation.

17. The method according to any one of claims 10 to 16, characterized in that, The method further includes: Before sending the RRC reconfiguration message, a measurement report message sent by the terminal is received.

18. The method according to any one of claims 10 to 17, characterized in that, The method further includes: After sending the RRC reconfiguration message, receive the RRC reconfiguration complete message sent by the terminal.

19. An indicating device for carrier aggregation, characterized in that, The device includes: The receiving module is used to receive an RRC reconfiguration message sent by a network device. The RRC reconfiguration message carries LTM candidate configuration information, which indicates the configuration of the candidate primary cell. The measurement module is used to perform L1 measurements on the candidate primary cell, as well as the primary and secondary cells and / or secondary cells associated with the candidate primary cell, and to obtain an L1 measurement report; The sending module is used to report the L1 measurement report to the network device; The receiving module is further configured to receive first indication information sent by the network device according to the L1 measurement report; the first indication information is used to instruct the terminal to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation.

20. An indicating device for carrier aggregation, characterized in that, The device includes: The sending module is used to send an RRC reconfiguration message to the terminal. The RRC reconfiguration message is used to carry LTM candidate configuration information, which is used to indicate the configuration of the candidate primary cell. The receiving module is configured to receive an L1 measurement report reported by the terminal, which is obtained by performing L1 measurements on the candidate primary cell and the primary and / or secondary cells associated with the candidate primary cell. The transmitting module is further configured to transmit first indication information to the terminal based on the L1 measurement report; the first indication information is used to instruct the terminal to add and / or activate primary and secondary cells and / or secondary cells for carrier aggregation.

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