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

Abstract

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

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

[0001] The present application relates to the field of mobile communication technologies, and in particular to an indication method, apparatus, device, and storage medium for carrier aggregation. Background Art

[0002] To support a larger bandwidth, a communication system may jointly schedule and utilize resources on multiple component carriers (CCs) through carrier aggregation (CA).

[0003] In related technologies, in a carrier aggregation scenario, after a terminal accesses a primary cell or completes handover of the primary cell, a network device may add and / or activate a secondary cell for the terminal through signaling.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a method, apparatus, device, and storage medium for indicating carrier aggregation. The technical solution is as follows:

[0006] On the one hand, an embodiment of the present application provides a method for indicating carrier aggregation, the method being performed by a terminal, the method including:

[0007] receiving an RRC reconfiguration message sent by a network device, where the RRC reconfiguration message is used to carry LTM candidate configuration information, where the LTM candidate configuration information is used to indicate a configuration of a candidate primary cell;

[0008] Perform 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;

[0009] Reporting the L1 measurement report to the network device;

[0010] 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 a primary and secondary cell and / or a secondary cell for carrier aggregation.

[0011] In one aspect, an embodiment of the present application provides a method for indicating carrier aggregation, the method being performed by a network device, the method including:

[0012] Sending an RRC reconfiguration message to the terminal, where the RRC reconfiguration message is used to carry LTM candidate configuration information, where the LTM candidate configuration information is used to indicate the configuration of the candidate primary cell;

[0013] receiving an L1 measurement report reported by the terminal, obtained by performing L1 measurement on the candidate primary cell and the primary and secondary cells and / or secondary cells associated with the candidate primary cell;

[0014] First indication information is sent to the terminal according to the L1 measurement report; the first indication information is used to instruct the terminal to add and / or activate a primary and secondary cell and / or a secondary cell for carrier aggregation.

[0015] On the other hand, an embodiment of the present application provides an indication device for carrier aggregation, the device including:

[0016] A receiving module, configured to 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 a candidate primary cell;

[0017] a measurement module, configured to perform L1 measurement on the candidate primary cell, and the primary secondary cell and / or secondary cell associated with the candidate primary cell, and obtain an L1 measurement report;

[0018] A sending module, configured to report the L1 measurement report to a network device;

[0019] The receiving module is further used 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 the primary and secondary cells and / or secondary cells for carrier aggregation.

[0020] On the other hand, an embodiment of the present application provides an indication device for carrier aggregation, the device including:

[0021] a sending module, configured to send an RRC reconfiguration message to the terminal, 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;

[0022] a receiving module, configured to receive an L1 measurement report reported by the terminal, obtained by performing L1 measurement on the candidate primary cell and the primary and secondary cells and / or secondary cells associated with the candidate primary cell;

[0023] The sending module is further used to send 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 the primary and secondary cells and / or secondary cells for carrier aggregation.

[0024] On the other hand, an embodiment of the present application provides a terminal, comprising a processor, a memory, and a transceiver;

[0025] The memory stores a computer program, and the processor executes the computer program to enable the terminal to implement the above-mentioned indication method for carrier aggregation.

[0026] On the other hand, an embodiment of the present application provides a network device, the network device including a processor, a memory, and a transceiver;

[0027] The memory stores a computer program, and the processor executes the computer program to enable the network device to implement the above-mentioned indication method for carrier aggregation.

[0028] On the other hand, an embodiment of the present application further provides a computer-readable storage medium, wherein the storage medium stores a computer program, and the computer program is loaded and executed by a processor to implement the above-mentioned indication method for carrier aggregation.

[0029] On the other hand, the present application also provides a chip, which is used to run in a communication device so that the communication device executes the above-mentioned indication method for carrier aggregation.

[0030] In yet another aspect, the present application provides a computer program product, comprising 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 method for indicating carrier aggregation.

[0031] On the other hand, the present application provides a computer program, which is executed by a processor of a communication device to implement the above-mentioned indication method for carrier aggregation.

[0032] An embodiment of the present application provides a scheme for indicating carrier aggregation. During the LTM process, 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 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. That is, during the process of cell switching of the terminal, the addition or activation of the primary and secondary cells and / or secondary cells for carrier aggregation can be completed, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIG1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

[0034] FIG2 is an overall flow chart of an LTM involved in this application;

[0035] FIG3 is a flowchart of a method for indicating carrier aggregation provided by one embodiment of the present application;

[0036] FIG4 is a flowchart of a method for indicating carrier aggregation provided by one embodiment of the present application;

[0037] FIG5 is a flowchart of a method for indicating carrier aggregation provided by one embodiment of the present application;

[0038] FIG6 is a flowchart of adding and activating a secondary cell involved in this application;

[0039] FIG7 is a schematic diagram of configuration information involved in this application;

[0040] FIG8 is a flowchart of adding and activating a primary and secondary cell involved in this application;

[0041] FIG9 is a schematic diagram of configuration information involved in this application;

[0042] FIG10 is a flowchart of another secondary cell addition and activation process involved in the present application;

[0043] FIG11 is a schematic diagram of configuration information involved in this application;

[0044] FIG12 is a block diagram of an indication device for carrier aggregation provided by one embodiment of the present application;

[0045] FIG13 is a block diagram of an indication device for carrier aggregation provided by one embodiment of the present application;

[0046] FIG14 is a schematic structural diagram of a communication device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application are further described in detail below with reference to the accompanying drawings.

[0048] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0049] Fig. 1 shows a schematic diagram of a communication system involved in an exemplary embodiment of the present application. 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 the present application.

[0050] The network device 110 in the present application provides wireless communication functions, and the network device 110 includes but is not limited to: Evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home Evolved Node B, or Home Node B, HNB), Baseband Unit (BBU), Access Point (AP) in Wireless Fidelity (Wi-Fi) system, Wireless Relay Node, Wireless Backhaul Node, Transmission Point (TP) or Transmission and Reception Point (TRP), etc., and can also be the Next Generation Node B (NGNB) in the 5th Generation (5G) mobile communication system. The term "gNB" refers to a base station (B, gNB) or a transmission point (TRP or TP), or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU), or a base station in a Beyond Fifth Generation (B5G) or a 6th Generation (6G) mobile communication system, or a core network (CN), fronthaul, backhaul, radio access network (RAN), network slicing, or a serving cell, primary cell (PCell), primary secondary cell (PSCell), special cell (SpCell), secondary cell (SCell), or neighboring cell of a terminal.

[0051] The terminal 120 and / or terminal 130 in this application are also called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, and user device. The terminals include, but are not limited to, handheld devices, wearable devices, vehicle-mounted devices, and Internet of Things devices, such as mobile phones, tablet computers, e-book readers, laptop computers, desktop computers, televisions, game consoles, mobile Internet devices (MIDs), augmented reality (AR) terminals, virtual reality (VR) terminals, and mixed reality (MR) terminals, wearable devices, handles, 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, wireless local loops (WLANs), and wireless terminals in industrial control. Loop (WLL) stations, personal digital assistants (PDA), TV set-top boxes (STB), customer premises equipment (CPE), etc.

[0052] The network device 110 and the terminal 120 communicate with each other via some air interface technology, such as a Uu interface.

[0053] Exemplarily, there are two communication scenarios between the network device 110 and the terminal 120: an uplink communication scenario and a downlink communication scenario. Uplink communication refers to sending signals to the network device 110; downlink communication refers to sending signals to the terminal 120.

[0054] The terminal 120 and the terminal 130 communicate with each other via some air interface technology, such as a PC5 interface.

[0055] In some embodiments, there are two communication scenarios between terminal 120 and terminal 130: a first sideline communication scenario and a second sideline communication scenario. The first sideline communication refers to sending a signal to terminal 130; the second sideline communication refers to sending a signal to terminal 120.

[0056] Terminal 120 and terminal 130 are both within the network coverage and located in the same cell, or both within the network coverage but located in different cells, or terminal 120 is within the network coverage but terminal 130 is outside the network coverage.

[0057] The technical solutions provided in the embodiments of the present application can be applied to various communication systems, such as: Global System of 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, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum) system. Unlicensed spectrum, NR-U) system, terrestrial communication network (Terrestrial Networks, TN) system, non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, Wi-Fi), cellular Internet of Things system, cellular passive Internet of Things system, can also be applied to the subsequent evolution system of the 5G NR system, and can also be applied to B5G, 6G and subsequent evolution systems. In some embodiments of the present application, "NR" may also be referred to as a 5G NR system or a 5G system. Among them, the 5G mobile communication system may include non-standalone networking (NSA) and / or standalone networking (SA).

[0058] The technical solutions provided in the embodiments of the present application can also be applied to machine type communication (MTC), long term evolution technology for machine-to-machine communication (LTE-M), device-to-device (D2D) network, machine-to-machine (M2M) network, Internet of Things (IoT) network or other networks. Among them, the IoT network can include, for example, the Internet of Vehicles. Among them, the communication mode in the Internet of Vehicles system is collectively referred to as vehicle to other devices (Vehicle to X, V2X, X can represent anything), for example, the V2X can include: vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian communication (V2P) or vehicle to network (V2N) communication, etc.

[0059] 1) Carrier Aggregation

[0060] Carrier aggregation enables the NR system to support a larger bandwidth and achieve a higher system peak rate by jointly scheduling and utilizing resources on multiple component carriers (CCs). Based on the spectrum continuity of the aggregated carriers, it can be categorized into continuous and non-continuous carrier aggregation. Based on whether the aggregated carriers are in the same bandwidth (band), it can be categorized into intra-band carrier aggregation and inter-band carrier aggregation.

[0061] There is only one Primary Cell Component (PCC), which provides Radio Resource Control (RRC) signaling connection, Non-Access Stratum (NAS) functions, security control, etc. The Physical Uplink Control Channel (PUCCH) is on the PCC and only exists on the PCC. The Secondary Cell Component (SCC) only provides additional radio resources. PCC and SCC are collectively referred to as serving cells. The standard also stipulates that a maximum of 5 aggregated carriers are supported, that is, the maximum bandwidth after aggregation is 100 MHZ, 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 ensures that the C-RNTI does not conflict in the cell where each carrier is located. Since both asymmetric carrier aggregation and symmetric carrier aggregation are supported, the aggregated carriers must have downlink and may not have uplink. Moreover, for the primary carrier cell, there must be a physical downlink control channel (PDCCH) and PUCCH of the cell. Moreover, only the primary carrier cell has PUCCH, while other secondary carrier cells may have PDCCH.

[0062] 2) SCell (Secondary Cell) activation

[0063] SCells are configured through dedicated RRC signaling. Initially, they are in a deactivated state, in which data transmission and reception are disabled. SCells are then activated by the Media Access Control (MAC) Control Element (CE), enabling data transmission and reception. This architecture is suboptimal in terms of SCell configuration and activation latency.

[0064] Activation and deactivation of secondary carriers, as well as addition and deletion, may result in transmission interruptions to the UE. Specific requirements are defined in sections 8.2.4.2.1 and 8.2.4.2.2 of 3GPP protocol TS38.133, which cover different interruption scenarios caused by secondary carrier activation and deactivation for intra-band and inter-band dual-connectivity (DC) or CA. These are all defined based on the Synchronization Signal Block (SSB) signal, including SSB-based Automatic Gain Control (AGC) settings and SSB-based timing tracking.

[0065] 3) L1 / L2-Triggered Mobility (LTM)

[0066] LTM is a PCell (or PSCell) cell switch procedure that the network triggers via MAC CE based on L1 measurements.

[0067] LTM is a procedure in which a gNB receives L1 measurement report(s)from a UE,and on their basis the gNB changes UE's serving cell by a cell switch command signaled via a MAC CE.The cell switch command indicates an LTM candidate cell configuration that the gNB previously prepared and provided to the UE through RRC signaling.Then the UE switches to the target cell according to the cell switch command.The LTM procedure can be used to reduce the mobility latency. (LTM is a procedure in which a gNB receives L1 measurement report(s)from a UE,and on their basis the gNB changes UE's serving cell by a cell switch command signaled via a MAC CE.The cell switch command indicates an LTM candidate cell configuration that the gNB previously prepared and provided to the UE through RRC signalling.Then the UE switches to the target cell according to the cell switch command.The LTM procedure can be used to reduce the mobility latency.)

[0068] The network may request the UE to perform early TA acquisition of a candidate cell before a cell switch. The early TA acquisition is triggered by PDCCH order [or through UE-based TA measurement].

[0069] RAN1 confirmed the working assumption to support UE-based TA measurement (UE derives TA based on Rx timing difference between current serving cell and candidate cell as well as TA value for the current serving cell).

[0070] If no TA value is provided, the network indicates in the cell switch command whether the UE shall access the target cell with a RA procedure if a TA value is not provided or with PUSCH transmission using the indicated TA value.For RACH-less LTM,the UE either monitors 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.

[0071] Upon cell switch decision, R2 assumes that the source Distributed Unit (DU) informs the target DU about the selected beam, so that the target DU can start scheduling dynamic UL grant.

[0072] The following principles apply to LTM:

[0073] -The UE doesn't update its security key in LTM.

[0074] -Subsequent LTM is supported.

[0075] LTM supports both intra-gNB-DU and inter-gNB-CU mobility. LTM also supports inter-frequency mobility, including mobility to an inter-frequency cell that is not a current serving cell. The following scenarios are supported:

[0076] -PCell change in non-CA scenario,

[0077] -PCell change in CA scenario,

[0078] -Dual connectivity scenario, at least for the PSCell change without MN involvement case, i.e. intra-SN PSCell change.

[0079] A supervision timer can be used to detect failure of LTM cell switch procedure,wherein LTM procedure fails if the LTM supervision timer expires,upon which the UE initiates RRC connection re-establishment procedure.

[0080] While the UE has stored LTM candidate cell configurations the UE can also execute any L3 handover command sent by the network. It is up to the network to avoid any issue due to a collision between LTM execution and L3 handover execution, e.g. avoiding sending LTM cell switch command and L3 handover command simultaneously.

[0081] The cell switch command is conveyed in a MAC CE, which contains the necessary information to perform the LTM cell switch.

[0082] The overall procedure for LTM is shown in Figure 2. Subsequent LTM is done by repeating the early synchronization, LTM execution, and LTM completion steps without releasing other LTM candidate cell configurations after each LTM completion.

[0083] As shown in Figure 2, the LTM process is as follows:

[0084] S1: The UE sends a MeasurementReport message to the gNB. The gNB decides to configure LTM and initiates candidate cell(s) preparation.

[0085] S2: The gNB transmits an RRCReconfiguration message to the UE including the LTM candidate cell configurations of one or multiple candidate cells.

[0086] S3: The UE stores the LTM candidate cell configurations and transmits an RRCReconfigurationComplete message to the gNB.

[0087] S4a, The UE [may]performs DL synchronization with candidate cell(s) before receiving the cell switch command.

[0088] DL synchronization for candidate cell(s) before cell switch command is supported, at least based on SSB.

[0089] S4b, the UE [may] perform early TA acquisition on the candidate cell requested by the network before receiving the cell handover command. This is accomplished by a CFRA triggered by a PDCCH command from the source cell, followed by the UE sending 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 a 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 network implementation to ensure TA validity. (The UE[may]performs early TA acquisition with candidate cell(s)requested by the network before receiving the cell switch command.This is done via CFRA triggered by a PDCCH order from 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 receive RAR for the purpose of TA value acquisition and the TA value of the candidate cell is indicated in the cell switch command.The UE doesn't maintain the TA timer for the candidate cell and relies on network implementation to guarantee the TA validity.)

[0090] In step S5, the UE performs L1 measurements on the configured candidate cell(s), and transmits lower-layer measurement reports to the gNB. L1 measurement should be performed as long as apply the RRC reconfiguration in step 2.

[0091] In step S6, the gNB decides to execute cell switch to a target cell, and transmits a MAC CE triggering cell 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.

[0092] S7: If the UE does not have a valid TA of the target cell, the UE performs a random access procedure towards the target cell.

[0093] S8, the UE completes the LTM cell switch procedure [by sending RRCReconfigurationComplete message to target cell].If the UE has performed a RA procedure in step S7, the UE considers that LTM execution is successfully completed when the random access procedure is successfully completed.For RACH-less LTM, the UE considers that LTM execution is successfully completed when the UE determines that the network has successfully received its first UL data. (The UE completes the LTM cell switch procedure [by sending RRCReconfigurationComplete message to target cell].If the UE has performed a RA procedure in step 7 the UE considers that LTM execution is successfully completed when the random access procedure is successfully completed.For RACH-less LTM, the UE considers that LTM execution is successfully completed when the UE determines that the network has successfully received its first UL data.)

[0094] RAN2 assumes RRCReconfigurationComplete message is always sent at each LTM execution.

[0095] Steps S4-S8 can be performed multiple times for subsequent LTM cell switch using the LTM candidate cell configuration(s) provided in step 2.

[0096] Currently, the MAC CE in step S6 may include a Transmission Configuration Indicator (TCI) state, a TA, and a candidate index. The candidate index refers to the configuration of a candidate cell in the LTM candidate configuration in step S2 (the candidate configuration index of the target cell).

[0097] 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 is the PCell configuration and which is the SCell configuration.

[0098] UE mobility measurement (such as LTM) mainly evaluates the candidate PCell. The subsequent embodiments of this application provide a solution, that is, the network retains both the Pcell and the Scell ​​under the same MCG (master cell group) in the candidate cells configured in the RRC reconfiguration. The candidate PCell and the candidate Scell ​​are configured to be associated in advance (step S2 in Figure 2 above) or indicated by MACCE (step S6 in Figure 2 above). The UE can measure them both in advance in the LTM process (step S5 in Figure 2 above) to obtain preliminary evaluation results. In addition to indicating the candidate configuration index to complete the Pcell switching of LTM (step S8 in Figure 2 above), the Scell ​​can also be added / activated at the same time. In this way, the process and delay of re-issuing the SCell-related configuration and performing the measurement are eliminated, which greatly shortens the time for the UE to establish multi-carrier CA or DC.

[0099] Please refer to FIG3 , which shows a flowchart of a method for indicating carrier aggregation provided by one embodiment of the present application. The method may be performed by a terminal, where the terminal may be the terminal 120 in the network architecture shown in FIG1 . The method may include the following steps:

[0100] Step 301: Receive an RRC reconfiguration message sent by a network device. The RRC reconfiguration message is used to carry LTM candidate configuration information. The LTM candidate configuration information is used to indicate the configuration of a candidate primary cell.

[0101] The RRC reconfiguration message may be an RRC message sent when the terminal sends a measurement report (MeasurementReport) message to the network device and the network device decides to configure LTM and trigger candidate cell (candidate cells) preparation according to the report.

[0102] The RRC reconfiguration message may at least indicate the configuration of the candidate primary cell.

[0103] Step 302: Perform 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.

[0104] In the embodiment of the present application, during the LTM process, in addition to performing L1 measurement on the candidate primary cell, the terminal may also perform L1 measurement on the primary secondary cell and / or secondary cell associated with the candidate primary cell.

[0105] Step 303: Report the L1 measurement report to the network device.

[0106] 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 the primary and secondary cells and / or secondary cells for carrier aggregation.

[0107] In an embodiment of the present application, when the network device determines to instruct the terminal to perform cell switching based on the L1 measurement report, it can also send first indication information based on the L1 measurement report to instruct the terminal to add and / or activate the primary and secondary cells and / or secondary cells for carrier aggregation.

[0108] To sum up, according to the solution shown in the embodiment of the present application, 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 during the LTM process, and report the L1 measurement report to the network device. The network device 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. That is, during the process of cell switching of the terminal, the addition or activation of the primary and secondary cells and / or secondary cells for carrier aggregation can be completed, 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.

[0109] Please refer to FIG4 , which shows a flowchart of a method for indicating carrier aggregation provided by one embodiment of the present application. The method may be performed by a network device, wherein the network device may be the network device 110 in the network architecture shown in FIG1 . The method may include the following steps:

[0110] Step 401: Send an RRC reconfiguration message to the terminal. The RRC reconfiguration message is used to carry LTM candidate configuration information. The LTM candidate configuration information is used to indicate the configuration of the candidate primary cell.

[0111] Step 402: Receive an L1 measurement report reported by a terminal, which is obtained by performing L1 measurement on the candidate primary cell and the primary and secondary cells and / or secondary cells associated with the candidate primary cell.

[0112] Step 403: Send 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 a primary and secondary cell and / or a secondary cell for carrier aggregation.

[0113] To sum up, according to the solution shown in the embodiment of the present application, 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 during the LTM process, and report the L1 measurement report to the network device. The network device 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. That is, during the process of cell switching of the terminal, the addition or activation of the primary and secondary cells and / or secondary cells for carrier aggregation can be completed, 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.

[0114] Based on the embodiments shown in FIG3 and FIG4 , please refer to FIG5 , which shows a flowchart of a method for indicating carrier aggregation provided by one embodiment of the present application. The method can be interactively performed by a terminal and a network device, wherein the network device can be the network device 110 in the network architecture shown in FIG1 , and the terminal can be the terminal 120 in the network architecture shown in FIG1 ; the method can include the following steps:

[0115] In step 501, a network device sends an RRC reconfiguration message to a terminal, and the terminal receives the RRC reconfiguration message. 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 a candidate primary cell.

[0116] The RRC reconfiguration message may be an RRC reconfiguration message sent by the network device to the terminal during the LTM process.

[0117] For example, the terminal may report a measurement report to the network device. Afterwards, if the network device decides to configure LTM and trigger candidate cell preparation based on the report, the RRC reconfiguration message may be sent to the terminal.

[0118] The RRC reconfiguration message is used to configure LTM candidate configuration information to the terminal to instruct the terminal to perform L1 measurement subsequently, so that the network device can trigger the terminal to perform cell handover according to the L1 measurement result of the terminal.

[0119] In some embodiments, the LTM candidate configuration information includes one or more LTM candidate cell configurations.

[0120] In an embodiment of the present application, a network device (such as a gNB) sends an RRCReconfiguration message to the UE, which includes at least one or more LTM candidate cell configurations (candidate cell configurations, which can be associated with indices of different cells) to instruct the terminal to perform subsequent L1 measurements.

[0121] In some embodiments, the candidate cell configuration includes one or more of the following configurations:

[0122] The measurement configuration of the candidate primary cell can be used by the terminal to measure the candidate primary cell;

[0123] The measurement configuration of the 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;

[0124] 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;

[0125] The measurement configuration of the secondary cell associated with the candidate primary and secondary cell may be used by the terminal to measure the secondary cell associated with the candidate primary and secondary cell.

[0126] After receiving the RRC reconfiguration message, the terminal may perform downlink synchronization with the candidate primary cell; and / or perform downlink synchronization with the candidate primary and secondary cells.

[0127] In step 502, the terminal performs L1 measurement on the candidate primary cell, and the primary and secondary cells and / or secondary cells associated with the candidate primary cell, and obtains an L1 measurement report.

[0128] In some embodiments, the terminal may perform L1 measurement on the candidate primary cell, and the primary secondary cell and / or secondary cell associated with the candidate primary cell according to the measurement configuration in the candidate cell configuration, and obtain an L1 measurement report.

[0129] For example, for each candidate cell configuration, the terminal sequentially performs L1 measurement on the candidate primary cell in the candidate cell configuration, and the primary secondary cell and / or secondary cell associated with the candidate primary cell.

[0130] 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.

[0131] The terminal may report L1 measurement results through lower-layer measurement reports. Unlike L3 reports, L1 measurement reports may be carried in L1 (such as a physical uplink shared channel (PUSCH) or uplink control information (UCI)) or MAC CE.

[0132] In step 504, the network device sends first indication information to the terminal according to the L1 measurement report, and the terminal receives the 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 the primary and secondary cells and / or secondary cells for carrier aggregation.

[0133] In some embodiments, when the network device determines to instruct the terminal to switch to the target cell based on the L1 measurement report, it can 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 and secondary cells and / or secondary cells for carrier aggregation in the primary cell after the corresponding terminal is switched (such as the target cell switched above).

[0134] In some embodiments, the association relationship between the primary cell of the terminal and the primary and secondary cells and / or secondary cells used for carrier aggregation is indicated by association information;

[0135] 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.

[0136] Among them, the association relationship between the above-mentioned primary and secondary cells and / or secondary cells used for carrier aggregation and the corresponding primary cells can be indicated or configured by the network device at the same time as instructing the terminal to switch to the target cell, that is, through the first indication information to indicate or configure the primary and secondary cells and / or secondary cells used for carrier aggregation that are associated with the primary cell of the terminal after the terminal cell is switched.

[0137] Alternatively, the association relationship between the above-mentioned primary and secondary cells and / or secondary cells used for carrier aggregation and the corresponding primary cells can also be indicated by the network device when sending the RRC reconfiguration message. That is, when the network device sends the RRC reconfiguration message, it can configure the associated primary and secondary cells and / or secondary cells for each candidate primary cell.

[0138] In some embodiments, the association information includes one or more of the following information:

[0139] 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.

[0140] 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 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 referred to as a candidate primary cell when configured through an RRC reconfiguration message).

[0141] For another example, when the primary and secondary cells and / or secondary cells configured for carrier aggregation include a secondary cell, the above-mentioned associated information may include identification information of the secondary cell, such as the index, ID or group ID of the secondary cell, and the identification information of the above-mentioned secondary cell is associated with the identification information of the primary cell or the identification information of the primary and secondary cells.

[0142] In some embodiments, when the association information is configured by an RRC reconfiguration message and is indicated to be effective by the first indication information, the first indication information includes a control indication;

[0143] When the value of the control indication is true, the first indication information is used to instruct to add and / or activate the primary and secondary cells and / or the secondary cells associated with the primary cell.

[0144] In some embodiments, when the value of the control indication is false, the first indication information is used to indicate not to add and / or activate the primary and secondary cells and / or the secondary cells associated with the primary cell.

[0145] Among them, when the association information is configured by the RRC reconfiguration message and is 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 secondary cells and / or secondary cells associated with the candidate primary cell. In step 504, when the network device determines to instruct the terminal to switch to a certain primary cell, the identification information (such as an index) of the primary cell may be carried in the first indication information. At the same time, the network device may also carry a control indication in the first indication information for controlling whether to add and / or activate the primary and secondary cells and / or secondary cells associated with the primary cell for carrier aggregation; for example, if the network device determines based on the L1 measurement result that the terminal is to be switched to a certain primary cell, the identification information (such as an index) of the primary cell may be carried in the first indication information. 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, 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 adding and / or activation, then the value of the control indication carried in the first indication information is true (true); conversely, if the network device determines based on the L1 measurement result 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, 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 adding and / or activation, then the value of the control indication carried in the first indication information is false (false).

[0146] Optionally, the value of the control indication may be replaced by other types of values, for example, true may be replaced by 1, false may be replaced by 0; or true may be replaced by 0, false may be replaced by 1. The embodiment of the present application does not limit the type of the value of the control indication.

[0147] Step 505: The terminal adds and / or activates a primary and secondary cell and / or a secondary cell for carrier aggregation according to the first indication information.

[0148] Among them, when the first indication information indicates adding and / or activating the primary and secondary cells and / or secondary cells for carrier aggregation, the terminal can add the cells indicated by the first indication information as the secondary cells and / or primary and secondary cells of the primary cell after switching.

[0149] 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;

[0150] When the first indication information is used to instruct the terminal to add and / or activate primary and secondary cells, and the terminal has not completed downlink synchronization with the primary and secondary cells, random access is initiated to the primary and secondary cells. After the random access is completed, the primary and secondary cells used for carrier aggregation are added and / or activated.

[0151] For the primary and secondary cells, since the terminal needs to perform downlink synchronization with the primary and secondary cells, before adding the primary and secondary cells, if the terminal has completed synchronization with the primary and secondary cells before (for example, 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 add and / or activate the primary and secondary cells after the random access is completed.

[0152] 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.

[0153] For example, after successfully adding and / or activating the primary and secondary cells and / or secondary cells for carrier aggregation, the terminal may generate CSI reports corresponding to the primary and secondary cells and / or secondary cells and report them to the network device.

[0154] Step 507: Upon receiving the CSI report reported by the terminal, the network device determines that the terminal has successfully added or activated the primary and secondary cells and / or the secondary cells for carrier aggregation.

[0155] For example, when the network device receives the CSI report corresponding to the primary and secondary cells and / or the secondary cells reported by the terminal, it can be considered that the terminal has successfully added or activated the primary and secondary cells and / or the secondary cells.

[0156] The above embodiment of the present application provides a Scell ​​addition / activation process based on LTM, which also includes two configuration-related enhancements:

[0157] 1) RRC reconfiguration enhancement: Establish an association between the configuration of candidate Pcell and SCell and the configuration index in the LTM switch command; that is, establish an association between the configuration of candidate primary / secondary cells and the configuration index in the LTM switch command;

[0158] 2) LTM switch command MAC CE is enhanced to introduce the Scell ​​addition and activation directly function.

[0159] Among them, the above-mentioned LTM-based Scell ​​addition / activation process can be divided into three cases, namely, the addition and / or activation of secondary cells associated with the primary cell, the addition and / or activation of primary and secondary cells, and the addition and / or activation of secondary cells associated with primary and secondary cells. These three cases are introduced below.

[0160] 1. MCG Scell ​​addition / activation based on LTM measurement

[0161] Please refer to Figure 6, which shows a flow chart of adding and activating a secondary cell involved in this application. As shown in Figure 6, the process of adding and / or activating a secondary cell in a primary cell group based on LTM measurement may include the following steps:

[0162] In step S1, the UE sends a MeasurementReport message to the gNB. The gNB decides to configure LTM and triggers candidate cell preparation.

[0163] S2: The 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 indices).

[0164] 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 cell 5 / 6 are their secondary carriers, both of which are secondary carriers under MCG.

[0165] S3: The UE stores the LTM candidate cell configuration and sends an RRCReconfigurationComplete message to the gNB.

[0166] In step S4a, the UE optionally performs downlink synchronization (DL synchronization with candidate cell(s), including at least downlink synchronization of candidate Pcells. Optionally, the UE performs early TA acquisition (early TA acquisition with candidate cell(s), where the network configures the cells and TAs). Contention-free random access (CFRA) may be triggered by the PDCCH odrder of the source cell, where the TA value of the candidate cell is indicated in the cell switch command.

[0167] In step S5, the UE performs L1 measurements of the configured candidate cells and sends measurement reports to the gNB (lower-layer measurement reports, which are different from L3 reports and can be carried in L1 (such as PUSCH or UCI) or MAC CE). The L1 measurements should be measured according to the RRC reconfiguration requirements in step S2.

[0168] The measurement configuration of the Scell ​​associated with the candidate target cell is retained in the candidate cell configuration, and measurement is performed in advance to obtain a preliminary evaluation result.

[0169] In step S6, the gNB decides to perform a cell handover to the target cell and sends a cell handover MAC CE (including at least the candidate configuration index of the target cell). The UE switches 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 schematic diagram of the above configuration information can be shown in Figure 7.

[0170] In addition to indicating the configuration index of the candidate Pcell, the MAC CE may also carry the index of the candidate Scell, which is used to add / activate the Scell ​​associated with the candidate Pcell. The Scell ​​index may also be empty, that is, there is no secondary cell eligible for activation or the secondary cell is not activated.

[0171] Alternatively, in addition to indicating the configuration index of the candidate Pcell, the MAC CE may also carry an indication of whether the LTM Scell ​​is added / activated. If the measurement result of the Scell ​​associated with the candidate Pcell also meets the conditions (such as meeting the accuracy and measurement threshold, etc.), the LTM Scell ​​addition / activation indication is true, otherwise it is false.

[0172] S7. Optionally, if the UE does not obtain a valid TA of the target cell, the UE initiates random access to the target cell.

[0173] In step S8, the UE completes the LTM cell switch and sends an RRCReconfigurationComplete message to the target cell. If the UE successfully completes the random access procedure in step S7, the UE considers LTM to have been successfully completed. For the RACH-less LTM procedure, the UE considers LTM to have been successfully completed when the network successfully receives the first uplink data message.

[0174] If the MAC CE in step S6 indicates the addition / activation of the Scell ​​associated with the candidate Pcell, if the scell configuration index / scell index is configured, and / or the LTM Scell ​​addition / activation indication is true, the UE initiates Scell ​​addition / activation, omitting the synchronization, measurement, and reporting processes. When the UE sends a CSI report, it is considered that the Scell ​​has been added / activated.

[0175] 2. SCG addition / activation based on LTM measurement

[0176] Please refer to Figure 8, which shows a flowchart of adding and activating a primary and secondary cell involved in this application. As shown in Figure 8, the process of adding and / or activating a primary and secondary cell in a secondary cell group based on LTM measurement may include the following steps:

[0177] In step S1, the UE sends a MeasurementReport message to the gNB. The gNB decides to configure LTM and triggers candidate cell preparation.

[0178] S2: The gNB sends an RRCReconfiguration message to the UE, which includes at least one or more LTM candidate cell configurations (candidate cell configurations, which can be associated with different indices).

[0179] For example, the multiple candidate cells include at least two candidates, one of which is a candidate PCell and the other is a candidate PScell.

[0180] S3: The UE stores the LTM candidate cell configuration and sends an RRCReconfigurationComplete message to the gNB.

[0181] In step S4a, the UE optionally performs downlink synchronization (DL synchronization with candidate cell(s), including at least downlink 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 the cells and TAs). CFRA may be triggered by the PDCCH odrder of the source cell, with the candidate cell's TA value indicated in the cell switch command.

[0182] In step S5, the UE performs L1 measurements of the configured candidate cells and sends measurement reports to the gNB (lower-layer measurement reports, which are different from L3 reports and can be carried in L1 (such as PUSCH or UCI) or MAC CE). The L1 measurements should be measured according to the RRC reconfiguration requirements in step S2.

[0183] The measurement configurations of the candidate target Pcell and target PScell ​​are retained in the candidate cell configuration, and measurements are performed in advance to obtain preliminary evaluation results.

[0184] In step S6, the gNB decides to perform a cell handover to the target cell (target PCell) and sends a cell handover MAC CE (including at least the candidate configuration index of the target cell). The UE switches to the target cell, and the configuration associated with the candidate configuration index takes effect, including at least SPCellConfig. A schematic diagram of the above configuration information can be shown in Figure 9.

[0185] In addition to indicating the configuration index of the candidate Pcell, the MAC CE may also carry the index of the candidate PScell, which is used to add / activate the SCG associated with the candidate Pcell.

[0186] Alternatively, in addition to indicating the configuration index of the candidate Pcell, the MAC CE may also carry an indication of whether the LTM PScell ​​is added / activated. If the measurement result of the Scell ​​associated with the candidate PScell ​​also meets the conditions, the indication of LTM PScell ​​addition / activation is true, otherwise it is false.

[0187] S7. Optionally, if the UE does not obtain a valid TA of the target cell, the UE initiates random access to the target cell.

[0188] In step S8, the UE completes the LTM cell switch and sends an RRCReconfigurationComplete message to the target cell. If the UE successfully completes the random access procedure in step S7, the UE considers LTM to have been successfully completed. For the RACH-less LTM procedure, the UE considers LTM to have been successfully completed when the network successfully receives the first uplink data message.

[0189] If the MAC CE in S6 indicates the addition / activation of the Scell ​​associated with the candidate Pcell, if the scell configuration index / scell index is configured, and / or the LTM Scell ​​addition / activation indication is true, the UE initiates PScell ​​addition / activation. If the PScell ​​has completed DL synchronization in S4, the UE sends a CSI report to indicate that the Scell ​​has been added / activated. Otherwise, the RACH procedure on the PScell ​​needs to be performed to complete the addition / activation after synchronization.

[0190] 3. Addition / activation of Multiple Scells based on LTM measurement

[0191] Please refer to Figure 10, which shows another flow chart of adding and activating a secondary cell involved in this application. As shown in Figure 10, the process of adding and / or activating a secondary cell in a secondary cell group based on LTM measurement may include the following steps:

[0192] S1: The UE sends a MeasurementReport message to the gNB. The gNB decides to configure LTM and triggers candidate cell preparation.

[0193] S2: The gNB sends an RRCReconfiguration message to the UE, which includes at least one or more LTM candidate cell configurations (candidate cell configurations, which can be associated with different indices).

[0194] For example, the multiple candidate cells include at least a candidate PCell and multiple candidate Scells. The candidate Scell ​​may be associated with a candidate Pcell or PScell.

[0195] S3: The UE stores the LTM candidate cell configuration and sends an RRCReconfigurationComplete message to the gNB.

[0196] In step S4a, the UE optionally performs downlink synchronization (DL synchronization with candidate cell(s), including at least downlink 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 the cells and TAs). CFRA may be triggered by the PDCCH odrder of the source cell, with the candidate cell's TA value indicated in the cell switch command.

[0197] In step S5, the UE performs L1 measurements of the configured candidate cells and sends measurement reports to the gNB (lower-layer measurement reports, which are different from L3 reports and can be carried in L1 (such as PUSCH or UCI) or MAC CE). The L1 measurements should be measured according to the RRC reconfiguration requirements in step S2.

[0198] The candidate cell configuration retains the measurement configuration of the candidate target Pcell, PScell ​​and associated Scells, and is measured in advance to obtain a preliminary evaluation result.

[0199] In step S6, the gNB decides to perform a cell handover to the target cell (target PCell) and sends a cell handover MAC CE (including at least the candidate configuration index of the target cell). The UE switches to the target cell, and the configuration associated with the candidate configuration index takes effect, including at least Cellgourpconfig, SPCellconfig, and Scelltoaddmodlist. A schematic diagram of the above configuration information can be shown in Figure 11.

[0200] In addition to indicating the configuration index of the candidate Pcell, the MAC CE may also carry the index of the candidate PScell ​​and / or multiple cell IDs or group IDs of Scells associated with the candidate PCell or PScell, for adding / activating multiple Scells.

[0201] Alternatively, the MAC CE may also carry an indication of whether to allow the addition / activation of Scells of the LTM PCell or PScell ​​associated group. If the Scells of a certain associated group meet the requirements, the indication of the LTM PScell ​​addition / activation is true, otherwise it is false.

[0202] S7. Optionally, if the UE does not obtain a valid TA of the target cell, the UE initiates random access to the target cell.

[0203] In step S8, the UE completes the LTM cell switch and sends an RRCReconfigurationComplete message to the target cell. If the UE successfully completes the random access procedure in step S7, the UE considers LTM to have been successfully completed. For the RACH-less LTM procedure, the UE considers LTM to have been successfully completed when the network successfully receives the first uplink data message.

[0204] If the MAC CE in S6 indicates groupID and / or indicates true, the UE initiates multiple Scell ​​addition / activation. The UE only needs to complete this process within a certain time, where the longest time for multiple Scell ​​addition and activation is the sum of the times for each Scell.

[0205] Please refer to Figure 12, which shows a block diagram of an indication device for carrier aggregation provided by an embodiment of the present application. The device has the functions of implementing the method shown in Figure 3 or Figure 5 above, which is performed by the terminal. As shown in Figure 12, the device may include:

[0206] A receiving module 1201 is configured to receive an RRC reconfiguration message sent by a network device, where the RRC reconfiguration message is used to carry LTM candidate configuration information, where the LTM candidate configuration information is used to indicate a configuration of a candidate primary cell;

[0207] The measurement module 1202 is configured to perform L1 measurement on the candidate primary cell, and the primary secondary cell and / or secondary cell associated with the candidate primary cell, and obtain an L1 measurement report;

[0208] The sending module 1203 is configured to report the L1 measurement report to a network device;

[0209] 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 configured to instruct the terminal to add and / or activate a primary and secondary cell and / or a secondary cell for carrier aggregation.

[0210] In some embodiments, the association relationship between the primary cell of the terminal and the primary and secondary cells and / or secondary cells used for carrier aggregation is indicated by association information;

[0211] The association information is configured by the first indication information;

[0212] or,

[0213] The association information is configured by the RRC reconfiguration message and is indicated to take effect by the first indication information.

[0214] In some embodiments, the association information includes one or more of the following information:

[0215] 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.

[0216] In some embodiments, when the association information is configured by the RRC reconfiguration message and is indicated to be effective by the first indication information, the first indication information includes a control indication;

[0217] In a case where the value of the control indication is true, the first indication information is used to instruct to add and / or activate a primary and secondary cell and / or a secondary cell associated with the primary cell.

[0218] In some embodiments, when the value of the control indication is false, the first indication information is used to indicate not to add and / or activate the primary and secondary cells and / or secondary cells associated with the primary cell.

[0219] In some embodiments, the LTM candidate configuration information includes one or more LTM candidate cell configurations.

[0220] In some embodiments, the candidate cell configuration includes one or more of the following configurations:

[0221] Measurement configuration of candidate primary cells;

[0222] Measurement configuration of candidate primary and secondary cells;

[0223] Measurement configuration of the secondary cell associated with the candidate primary cell;

[0224] The measurement configuration of the secondary cell associated with the candidate primary and secondary cells.

[0225] In some embodiments, the measurement module 1202 is configured to perform L1 measurement on the candidate primary cell, and the primary secondary cell and / or secondary cell associated with the candidate primary cell according to the measurement configuration in the candidate cell configuration, and obtain the L1 measurement report.

[0226] In some embodiments, the apparatus further comprises: a synchronization module configured to:

[0227] Performing downlink synchronization with the candidate primary cell;

[0228] and / or, performing downlink synchronization with the candidate primary and secondary cells.

[0229] In some embodiments, the apparatus further comprises:

[0230] An adding and activating module is used to add and / or activate a primary and secondary cell and / or a secondary cell for carrier aggregation according to the first indication information.

[0231] In some embodiments, the sending 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 the secondary cells for carrier aggregation.

[0232] In some embodiments, the added activation module is used to:

[0233] When the first indication information is used to instruct the terminal to add and / or activate a primary and secondary cell, and the terminal has completed downlink synchronization with the primary and secondary cell, adding and / or activating the primary and secondary cell for carrier aggregation;

[0234] 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 not completed downlink synchronization with the primary and secondary cells, random access is initiated to the primary and secondary cells, and after the random access is completed, the primary and secondary cells used for carrier aggregation are added and / or activated.

[0235] Please refer to Figure 13, which shows a block diagram of an indication device for carrier aggregation provided by an embodiment of the present application. The device has the functions of implementing the method shown in Figure 4 or Figure 5 above, which is performed by the network device. As shown in Figure 13, the device may include:

[0236] A sending module 1301 is configured to send an RRC reconfiguration message to a terminal, where the RRC reconfiguration message is used to carry LTM candidate configuration information, where the LTM candidate configuration information is used to indicate a configuration of a candidate primary cell;

[0237] The receiving module 1302 is configured to receive an L1 measurement report reported by the terminal, obtained by performing L1 measurement on the candidate primary cell and the primary and secondary cells and / or secondary cells associated with the candidate primary cell;

[0238] The sending module 1301 is further configured to send 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 a primary and secondary cell and / or a secondary cell for carrier aggregation.

[0239] In some embodiments, the association relationship between the primary cell of the terminal and the primary and secondary cells and / or secondary cells used for carrier aggregation is indicated by association information;

[0240] The association information is configured by the first indication information;

[0241] or,

[0242] The association information is configured by the RRC reconfiguration message and is indicated to take effect by the first indication information.

[0243] In some embodiments, the association information includes one or more of the following information:

[0244] 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.

[0245] In some embodiments, when the association information is configured by the RRC reconfiguration message and is indicated to be effective by the first indication information, the first indication information includes a control indication;

[0246] In a case where the value of the control indication is true, the first indication information is used to instruct to add and / or activate a primary and secondary cell and / or a secondary cell associated with the primary cell.

[0247] In some embodiments, when the value of the control indication is false, the first indication information is used to indicate not to add and / or activate the primary and secondary cells and / or secondary cells associated with the primary cell.

[0248] In some embodiments, the LTM candidate configuration information includes one or more LTM candidate cell configurations.

[0249] In some embodiments, the candidate cell configuration includes one or more of the following configurations:

[0250] Measurement configuration of candidate primary cells;

[0251] Measurement configuration of candidate primary and secondary cells;

[0252] Measurement configuration of the secondary cell associated with the candidate primary cell;

[0253] The measurement configuration of the secondary cell associated with the candidate primary and secondary cells.

[0254] In some embodiments, the apparatus further comprises:

[0255] The determining module is configured to determine, upon receiving the CSI report reported by the terminal, whether the terminal has successfully added or activated the primary and secondary cells and / or the secondary cells for carrier aggregation.

[0256] It should be noted that the device provided in the above embodiment only uses the division of the above-mentioned functional modules as an example to implement its functions. In actual applications, the above-mentioned 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.

[0257] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0258] Please refer to FIG14 , which shows a schematic diagram of the structure of a communication device 1400 provided in one embodiment of the present application. The communication device 1400 may include: a processor 1401 , a receiver 1402 , a transmitter 1403 , a memory 1404 , and a bus 1405 .

[0259] The processor 1401 includes one or more processing cores. The processor 1401 executes various functional applications and information processing by running software programs and modules.

[0260] 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. Memory 1404 is connected to processor 1401 via bus 1405. Memory 1404 can be used to store computer programs, and processor 1401 is used to execute the computer programs to implement the various steps in the above method embodiments.

[0261] In addition, 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 disk or optical disk, electrically erasable programmable read-only memory, erasable programmable read-only memory, static access memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0262] In an exemplary embodiment, when the communication device 1400 is implemented as the above-mentioned terminal, the receiver 1402 and the processor 1401 execute the computer program so that the communication device implements the various steps performed by the terminal in the method shown in either Figure 3 or Figure 5.

[0263] In an exemplary embodiment, when the communication device 1400 is implemented as the above-mentioned network device, the transmitter 1403 and the processor 1401 execute the computer program so that the communication device implements the various steps performed by the network device in the method shown in either Figure 4 or Figure 5.

[0264] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. The computer program is loaded and executed by a processor to implement all or part of the steps performed by the terminal or network device in the method shown in Figure 3, Figure 4 or Figure 5 above.

[0265] The present application also provides a chip comprising a programmable logic circuit and / or program instructions, which is used to operate in a communication device so that the communication device executes all or part of the steps performed by the terminal or network device in the method shown in Figures 3, 4 or 5 above.

[0266] The present application also provides a computer program product, which includes 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 all or part of the steps performed by the terminal or network device in the method shown in Figures 3, 4, or 5 above.

[0267] The present application also provides a computer program, which is executed by a processor of a communication device to implement all or part of the steps performed by a terminal or network device in the method shown in Figure 3, Figure 4 or Figure 5 above.

[0268] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application 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 codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0269] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for indicating carrier aggregation, characterized in that: The method is executed by a terminal, and includes: Receiving an RRC reconfiguration message sent by a network device, where the RRC reconfiguration message is used to carry LTM candidate configuration information, where the LTM candidate configuration information is used to indicate a configuration of a candidate primary cell; Performing L1 measurement on the candidate primary cell, and the primary secondary cell and / or secondary cell associated with the candidate primary cell, to obtain an L1 measurement report; Reporting the L1 measurement report to a network device; 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 a primary secondary cell and / or a secondary cell for carrier aggregation.

2. The method according to claim 1, characterized in that The association relationship between the primary cell of the terminal and the primary and secondary cells and / or secondary cells used for carrier aggregation is indicated by association information; The association information is configured by the first indication information; or, The association 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 information: The identification information of the primary and secondary cells associated with the primary cell, the identification information of the secondary cell associated with the primary cell, and the identification information of the secondary cell associated with the primary and secondary cells.

4. The method according to claim 2 or 3, characterized in that: In a case where the association information is configured by the RRC reconfiguration message and is indicated to be effective by the first indication information, the first indication information includes a control indication; In a case where the value of the control indication is true, the first indication information is used to indicate adding and / or activating a primary and secondary cell and / or a secondary cell associated with the primary cell.

5. The method according to claim 4, characterized in that In a case where the value of the control indication is false, the first indication information is used to indicate not to add and / or activate a primary and secondary cell and / or a secondary cell associated with the primary cell.

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

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

8. The method according to claim 7, characterized in that The performing L1 measurement on the candidate primary cell, and the primary secondary cell and / or secondary cell associated with the candidate primary cell to obtain an L1 measurement report includes: According to the measurement configuration in the candidate cell configuration, L1 measurement is performed on the candidate primary cell, and the primary secondary cell and / or secondary cell associated with the candidate primary cell to obtain the L1 measurement report.

9. The method according to claim 7 or 8, characterized in that: The method further comprises: Performing downlink synchronization with the candidate primary cell; and / or, Perform downlink synchronization with the candidate primary and secondary cells.

10. The method according to any one of claims 1 to 9, characterized in that: The method further comprises: According to the first indication information, a primary secondary cell and / or a secondary cell for carrier aggregation is added and / or activated.

11. The method according to claim 10, characterized in that The method further comprises: After successfully adding and / or activating the primary and secondary cells and / or secondary cells for carrier aggregation, a channel state indication CSI is sent to the network device. Report.

12. The method according to claim 10 or 11, characterized in that: The adding and / or activating a primary and secondary cell and / or a secondary cell 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 a primary and secondary cell, and the terminal has completed downlink synchronization with the primary and secondary cell, add and / or activate the primary and secondary cell for carrier aggregation; When the first indication information is used to instruct the terminal to add and / or activate primary and secondary cells, and the terminal has not completed downlink synchronization with the primary and secondary cells, random access is initiated to the primary and secondary cells, and after the random access is completed, the primary and secondary cells used for carrier aggregation are added and / or activated.

13. A method for indicating carrier aggregation, characterized in that: The method is performed by a network device, and the method includes: Sending an RRC reconfiguration message to the terminal, where the RRC reconfiguration message is used to carry LTM candidate configuration information, where the LTM candidate configuration information is used to indicate the configuration of the candidate primary cell; receiving an L1 measurement report reported by the terminal, obtained by performing L1 measurement on the candidate primary cell and the primary secondary cell and / or the secondary cell associated with the candidate primary cell; Sending 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 a primary secondary cell and / or a secondary cell for carrier aggregation.

14. The method according to claim 13, characterized in that The association relationship between the primary cell of the terminal and the primary and secondary cells and / or secondary cells used for carrier aggregation is indicated by association information; The association information is configured by the first indication information; or, The association information is configured by the RRC reconfiguration message and is indicated to take effect by the first indication information.

15. The method according to claim 14, characterized in that The associated information includes one or more of the following information: The identification information of the primary and secondary cells associated with the primary cell, the identification information of the secondary cell associated with the primary cell, and the identification information of the secondary cell associated with the primary and secondary cells.

16. The method according to claim 14 or 15, characterized in that In a case where the association information is configured by the RRC reconfiguration message and is indicated to be effective by the first indication information, the first indication information includes a control indication; In a case where the value of the control indication is true, the first indication information is used to indicate adding and / or activating a primary and secondary cell and / or a secondary cell associated with the primary cell.

17. The method according to claim 16, characterized in that In a case where the value of the control indication is false, the first indication information is used to indicate not to add and / or activate a primary and secondary cell and / or a secondary cell associated with the primary cell.

18. The method according to any one of claims 13 to 17, characterized in that: The LTM candidate configuration information includes one or more LTM candidate cell configurations.

19. The method according to claim 18, characterized in that The candidate cell configuration includes one or more of the following configurations: Measurement configuration of candidate primary cells; Measurement configuration of candidate primary and secondary cells; Measurement configuration of the secondary cell associated with the candidate primary cell; The measurement configuration of the secondary cell associated with the candidate primary and secondary cells.

20. The method according to any one of claims 13 to 19, characterized in that: The method further comprises: In case of receiving the CSI report reported by the terminal, it is determined that the terminal successfully adds or activates the primary and secondary cells and / or the secondary cells for carrier aggregation.

21. A carrier aggregation indication device, characterized in that: The device comprises: A receiving module, used to 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 a candidate primary cell; a measurement module, configured to perform L1 measurement on the candidate primary cell, and the primary secondary cell and / or secondary cell associated with the candidate primary cell, Obtain L1 measurement report; A sending module, used for reporting the L1 measurement report to a network device; The receiving module is further used 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 a primary secondary cell and / or a secondary cell for carrier aggregation.

22. A carrier aggregation indication device, characterized in that: The device comprises: A sending module, used to send an RRC reconfiguration message to the terminal, where the RRC reconfiguration message is used to carry LTM candidate configuration information, where the LTM candidate configuration information is used to indicate the configuration of the candidate primary cell; A receiving module, configured to receive an L1 measurement report reported by the terminal, obtained by performing L1 measurement on the candidate primary cell and the primary secondary cell and / or the secondary cell associated with the candidate primary cell; The sending module is further used to send 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 the primary and secondary cells and / or secondary cells for carrier aggregation.

23. A terminal, characterized in that: The terminal includes a processor, a memory and a transceiver; The memory stores a computer program, and the processor executes the computer program so that the terminal implements the indication method for carrier aggregation as described in any one of claims 1 to 12 above.

24. A network device, characterized in that: The network device includes a processor, a memory and a transceiver; The memory stores a computer program, and the processor executes the computer program so that the network device implements the indication method for carrier aggregation as described in any one of claims 13 to 20 above.

25. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and the computer program is used to be executed by a processor of a communication device so that the communication device implements the indication method for carrier aggregation as described in any one of claims 1 to 20.

26. A chip, characterized in that: The chip includes a programmable logic circuit and / or program instructions, and the chip is used to run in a communication device so that the communication device executes the indication method for carrier aggregation as described in any one of claims 1 to 20.

27. A computer program product, characterized in that The computer program product includes computer instructions, which are stored in a computer-readable storage medium; the processor of the communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, so that the communication device executes the indication method for carrier aggregation as described in any one of claims 1 to 20.

28. A computer program, characterized in that The computer program is executed by a processor of a communication device, so that the communication device implements the indication method for carrier aggregation according to any one of claims 1 to 20.

Images