Cell configuration parameter determination method, indication method and related equipment

Abstract

Disclosed are a cell configuration parameter determination method, an indication method and a related device, belonging to the technical field of communications, the cell configuration parameter determination method comprising: a terminal switching to a target cell or a target cell group based on first information; the terminal determines configuration parameters of a released or reserved first cell according to the configuration information of the target cell or the target cell group, and the first cell is a mobile LTM candidate cell triggered by layer L1 or L2 signaling; wherein the first information comprises at least one of the following items: an L3 switching command, a radio resource control RRC reconfiguration message, conditional switching CHO candidate cell configuration and conditional primary and secondary cell change CPC candidate cell configuration.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a method for determining cell configuration parameters, an indication method and related equipment. Background Art

[0002] To reduce the switching delay, the mobile communication system introduces L1 / L2-triggered mobility (LTM) switching, that is, the distributed unit (DU) uses L1 or L2 signaling to instruct the terminal to switch to a suitable candidate cell based on the layer 1 (L1) measurement results reported by the terminal.

[0003] Currently, LTM only supports UE switching between cells associated with the same intra-Centralized Unit (intra-CU). Therefore, when the UE changes CU, the LTM candidate cell configuration provided by the source CU should be released. For example, if the network instructs the terminal to switch to an inter-CU cell through a Layer 3 (L3) switching command, the network can release the LTM candidate cell configuration saved by the UE through Radio Resource Control (RRC) signaling before sending the L3 switching command to avoid the UE retaining the LTM candidate cell configuration provided by the source CU after switching to the inter-CU cell.

[0004] However, when the network configures LTM and inter-CU conditional handover (CHO) or conditional primary and secondary cell change (CPC) for the terminal at the same time, and the terminal executes inter-CU CHO or CPC, since the UE evaluates the conditions and changes the serving CU by itself, the source CU cannot promptly instruct the UE to release its retained LTM candidate cell configuration before the switching cell or the primary secondary cell (PSCell) is changed, causing the terminal to still retain the LTM candidate cell configuration provided by the source CU after switching to the inter-CU cell, resulting in a waste of resources. Summary of the invention

[0005] The embodiments of the present application provide a method for determining cell configuration parameters, an indication method and related devices. The CHO or CPC performed by the terminal or the cell switching based on the L3 switching command may be an inter-CU switching or an intra-CU switching. At this time, the terminal can determine whether to release or retain the LTM candidate cell configuration provided by the source CU based on the configuration information of the target cell or target cell group after the switching.

[0006] In a first aspect, a method for determining a cell configuration parameter is provided, the method comprising:

[0007] The terminal switches to a target cell or a target cell group based on the first information;

[0008] The terminal determines, according to the configuration information of the target cell or the target cell group, configuration parameters of a first cell to be released or retained, where the first cell is a mobile LTM candidate cell triggered by layer L1 or L2 signaling;

[0009] The first information includes at least one of the following: L3 switching command, radio resource control RRC reconfiguration message, conditional switching CHO candidate cell configuration, conditional primary and secondary cell change CPC candidate cell configuration.

[0010] In a second aspect, a method for indicating a cell configuration parameter is provided, the method comprising:

[0011] The network side device sends configuration information of the second cell to the terminal, wherein the second cell includes at least one of a target cell, a target cell group, a candidate cell, and a candidate cell group, and the configuration information of the second cell includes or is associated with at least one of the following:

[0012] first indication information, wherein the first indication information indicates to change the key;

[0013] second indication information, where the second indication information indicates to release configuration parameters of the LTM candidate cell;

[0014] third indication information, wherein the third indication information indicates to retain the configuration parameters of the LTM candidate cell;

[0015] First identification.

[0016] In a third aspect, a device for determining a cell configuration parameter is provided, including:

[0017] A switching module, configured to switch to a target cell or a target cell group based on the first information;

[0018] A determination module, configured to determine configuration parameters of a first cell to be released or retained according to configuration information of the target cell or target cell group, wherein the first cell is a mobile LTM candidate cell triggered by layer L1 or L2 signaling;

[0019] The first information includes at least one of the following: L3 switching command, radio resource control RRC reconfiguration message, conditional switching CHO candidate cell configuration, conditional primary and secondary cell change CPC candidate cell configuration.

[0020] In a fourth aspect, a cell configuration parameter indication device is provided, including:

[0021] The first sending module is configured to send configuration information of a second cell to the terminal, wherein the second cell includes at least one of a target cell, a target cell group, a candidate cell, and a candidate cell group, and the configuration information of the second cell includes or is associated with at least one of the following:

[0022] first indication information, wherein the first indication information indicates to change the key;

[0023] second indication information, where the second indication information indicates to release configuration parameters of the LTM candidate cell;

[0024] third indication information, wherein the third indication information indicates to retain the configuration parameters of the LTM candidate cell;

[0025] First identification.

[0026] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0027] In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is used to switch to a target cell or a target cell group based on first information; the processor is used to determine, according to the configuration information of the target cell or the target cell group, a configuration parameter of a first cell to be released or retained, wherein the first cell is a mobile LTM candidate cell triggered by layer L1 or L2 signaling;

[0028] The first information includes at least one of the following: L3 switching command, radio resource control RRC reconfiguration message, conditional switching CHO candidate cell configuration, conditional primary and secondary cell change CPC candidate cell configuration.

[0029] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0030] In an eighth aspect, a network side device is provided, including a processor and a communication interface, wherein the communication interface is used to send configuration information of a second cell to a terminal, wherein the second cell includes at least one of a target cell, a target cell group, a candidate cell, and a candidate cell group, and the configuration information of the second cell includes or is associated with at least one of the following:

[0031] first indication information, wherein the first indication information indicates to change the key;

[0032] second indication information, where the second indication information indicates to release configuration parameters of the LTM candidate cell;

[0033] third indication information, wherein the third indication information indicates to retain the configuration parameters of the LTM candidate cell;

[0034] First identification.

[0035] In a ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0036] In the tenth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0037] In the eleventh aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect, or to implement the method described in the second aspect.

[0038] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the cell configuration parameter determination method as described in the first aspect, or to implement the steps of the cell configuration parameter indication method as described in the second aspect.

[0039] In an embodiment of the present application, when the terminal is configured with an LTM candidate cell configuration, if the terminal switches to a target cell or a target cell group based on at least one of an L3 switching command, an RRC reconfiguration message, a CHO candidate cell configuration, and a CPC candidate cell configuration, the terminal can determine whether to release or retain the configuration parameters of the LTM candidate cell according to the configuration information of the target cell or the target cell group. For example: when the terminal performs CHO or CPC or a cell switching based on an L3 switching command or an RRC reconfiguration message, the switching may be an inter-CU switching or an intra-CU switching. At this time, the terminal can determine whether to release or retain the LTM candidate cell configuration provided by the source CU according to the configuration information of the target cell or the target cell group after the switching, thereby reducing the waste of resources caused by retaining redundant LTM candidate cell configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a schematic diagram of the structure of a wireless communication system to which the embodiments of the present application can be applied;

[0041] Figure 2 It is a schematic diagram of the CU-DU architecture;

[0042] Figure 3 This is a flowchart of a method for determining cell configuration parameters provided in an embodiment of the present application.

[0043] Figure 4 It is a flowchart of a method for indicating cell configuration parameters provided by an embodiment of the present application;

[0044] Figure 5 It is a structural diagram of a cell configuration parameter determination device provided in an embodiment of the present application;

[0045] Figure 6 It is a structural diagram of a cell configuration parameter indication device provided in an embodiment of the present application;

[0046] Figure 7 It is a structural diagram of a communication device provided in an embodiment of the present application;

[0047] Figure 8 is a schematic diagram of the structure of a terminal provided in an embodiment of the present application;

[0048] Fig. 9 It is a structural diagram of a network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0050] The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0051] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

[0052] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6 th Generation, 6G) communication system.

[0053] Figure 1A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle-mounted device (Vehicle User Equipment, VUE), a ship-mounted device, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AS) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station may be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a Relay Base Station (RBS), a Serving Base Station (SBS), a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Home Node B (HNB), a Home Evolved Node B, a Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0054] In order to facilitate understanding of the cell configuration parameter determination method and the cell configuration parameter indication method provided in the embodiments of the present application, the following contents are first explained:

[0055] 1. CU-DU Architecture

[0056] The NR access network splits the gNB into a central unit gNB-CU and a distributed unit gNB-DU, which are connected through the F1 interface. Figure 2 As shown, a gNB contains only one CU and may contain one or more DUs, and a DU contains one or more cells.

[0057] CU includes the Packet Data Convergence Protocol (PDCP) and above protocol stacks, and DU includes the protocol stacks below the PDCP layer, such as the Radio Link Control (RLC) layer protocol stack, the Medium Access Control (MAC) layer protocol stack, and the Physical (PHY) layer protocol stack.

[0058] Specifically, in the control plane, CU includes RRC and PDCP (PDCP-Control, PDCP-C) of the control plane; in the user plane, CU includes SDAP and PDCP (PDCP-User, PDCP-U) of the user plane.

[0059] 2. Dual Connectivity (DC)

[0060] DC refers to the network (NetWork, NW) providing two network nodes / base stations (access network elements) resources for user equipment (User Equipment, UE), one of which is called the master node (Master Node, MN) and the other is called the secondary node (Secondary Node, SN). Each network node can use one cell to provide services for the UE; it also uses carrier aggregation (Carrier Aggregation, CA) technology, that is, configuring multiple service cells controlled by the node for the UE.

[0061] One or more cells controlled by a node form a cell group (Cell Group, CG). The cell group controlled by MN is the Master Cell Group (MCG), and the cell group controlled by SN is the Secondary Cell Group (SCG). Each cell group contains a special cell (SpCell) and M secondary cells (Scell), where M is an integer greater than or equal to 0. In MCG, the special cell is called the primary cell (PCell), and in SCG, the special cell is called the primary secondary cell (PSCell).

[0062] 3. Conditional PSCell Change (CPC)

[0063] The NW pre-configures CPC configuration for the dual-connection UE, and the UE evaluates whether the execution conditions are met. Once the execution conditions are met, the UE will apply the pre-configured target SCG configuration and perform PSCell change.

[0064] 4. Condition Handover (CHO)

[0065] The NW pre-configures the CHO configuration for the UE, and the UE evaluates whether the execution conditions are met. Once the execution conditions are met, the UE will apply the pre-configured target MCG configuration and perform PCell switching.

[0066] CHO is associated with SCG: In the CHO configuration pre-configured by the NW for the UE, the candidate MCG is also associated with the candidate SCG configuration. After the CHO execution conditions are met, the UE switches to the target MCG and the target SCG at the same time;

[0067] CHO is associated with Conditional PSCell Addition / Change (CPAC): In the CHO configuration pre-configured by the NW for the UE, the candidate MCG is associated with one or more candidate SCGs at the same time. When the CHO execution conditions and the CPAC execution conditions of the PSCell associated with the CHO candidate cell are met at the same time, the UE switches to the target MCG and the target SCG at the same time.

[0068] In combination with the accompanying drawings, the cell configuration parameter determination method, cell configuration parameter indication method, cell configuration parameter determination device, cell configuration parameter indication device and related equipment provided in the embodiments of the present application are described in detail through some embodiments and their application scenarios.

[0069] See also Figure 3 The embodiment of the present application provides a method for determining a cell configuration parameter, the execution subject of which may be a terminal, and the terminal may be as follows Figure 1 The various types of terminals 11 listed in, or in addition to Figure 1 Terminals other than the terminal types listed in the illustrated embodiment are not specifically limited herein.

[0070] like Figure 3 As shown, the method for determining the cell configuration parameters includes the following steps:

[0071] Step 301: The terminal switches to a target cell or a target cell group based on first information, where the first information includes at least one of the following: an L3 switching command, a radio resource control RRC reconfiguration message, a conditional switching CHO candidate cell configuration, and a conditional primary and secondary cell change CPC candidate cell configuration.

[0072] In one implementation, the target cell may be at least one of a PCell and a PSCell, and the target cell group may be at least one of an MCG and an SCG.

[0073] Step 302: Determine configuration parameters of a first cell to be released or retained according to configuration information of the target cell or target cell group, where the first cell is an LTM candidate cell.

[0074] In some implementations, the configuration information of the target cell or target cell group may include or be associated with at least one of the following:

[0075] first indication information, wherein the first indication information indicates to change the key;

[0076] second indication information, where the second indication information indicates to release configuration parameters of the LTM candidate cell;

[0077] third indication information, wherein the third indication information indicates to retain the configuration parameters of the LTM candidate cell;

[0078] First identification.

[0079] Optionally, the terminal determines, according to the configuration information of the target cell or the target cell group, configuration parameters of the first cell to be released or retained, including:

[0080] In a case where the configuration information of the target cell or the target cell group includes first indication information, the terminal determines to release the configuration parameters of the first cell, and the first indication information indicates to perform a key change;

[0081] When the configuration information of the target cell or the target cell group does not include the first indication information, the terminal determines to retain the configuration parameters of the first cell;

[0082] In a case where the configuration information of the target cell or the target cell group includes or is associated with second indication information, the terminal determines to release the configuration parameters of the first cell, and the second indication information indicates to release the configuration parameters of the LTM candidate cell;

[0083] When the configuration information of the target cell or the target cell group does not include or is not associated with the second indication information, the terminal determines to retain the configuration parameters of the first cell;

[0084] In a case where the configuration information of the target cell or the target cell group includes or is associated with third indication information, the terminal determines to retain the configuration parameters of the first cell, and the third indication information indicates to retain the configuration parameters of the LTM candidate cell;

[0085] When the configuration information of the target cell or the target cell group does not include or is not associated with the third indication information, the terminal determines to release the configuration parameters of the first cell;

[0086] In a case where the configuration information of the target cell or the target cell group includes or is associated with a first identifier, the configuration information of the source cell includes or is associated with a second identifier, and the first identifier is the same as the second identifier, the terminal determines to retain the configuration parameters of the first cell; or,

[0087] When the configuration information of the target cell or target cell group includes or is associated with a first identifier, the configuration information of the source cell includes or is associated with a second identifier, and the first identifier is different from the second identifier, the terminal determines to release the configuration parameters of the first cell.

[0088] In one implementation, when the configuration information of the target cell or target cell group includes the first indication information, it can be determined that the target cell or target cell group and the source cell before the switching are cells provided by different CUs based on the need to change the key when an inter-CU switching occurs, and further, it can be determined that the configuration parameters of the LTM candidate cell provided by the source CU will be released; or, when the configuration information of the target cell or target cell group does not include the first indication information, it can be determined that the key may not be changed when an intra-CU switching occurs, and further, it can be determined that the target cell or target cell group and the source cell before the switching are cells provided by the same CU, and further, it can be determined that the configuration parameters of the LTM candidate cell provided by the source CU will be retained.

[0089] It should be noted that for cell switching within the same CU (same MN or same SN), when the network side device provides RRC pre-configuration, it can instruct the UE not to change the key during the switching process. For switching between different CUs, when the network side device provides RRC pre-configuration, it is necessary to indicate the key change.

[0090] For example: For MCG switching, the network side device can indicate whether the key is changed after the switch through high-level information elements (such as MasterKeyUpdate IE). If the MasterKeyUpdate IE exists, the UE derives a new key based on the MasterKeyUpdate. If it does not exist, the original key is used after the switch.

[0091] For another example: For SCG switching, the network can indicate whether the key is changed after the switch through a high-level information element (such as sk-Counter IE). If the sk-Counter IE exists, the UE derives a new key based on the sk-Counter. If it does not exist, the original key is used after the switch.

[0092] The first indication information in the embodiment of the present application can reuse the above-mentioned MasterKeyUpdate IE or sk-Counter IE.

[0093] For example: Assuming that the terminal stores at least one LTM candidate cell configuration, the candidate cell configuration is used for PCell handover / MCG mobility, and the terminal receives at least one CHO candidate cell configuration, the terminal can apply the target PCell / MCG configuration associated with the satisfied condition when evaluating whether the CHO execution condition is satisfied. At this time, if the target PCell / MCG configuration contains the first indication information, such as MasterKeyUpdate IE, the terminal releases the saved configuration parameters of the LTM candidate cell for PCell handover / MCG mobility; if the target PCell / MCG configuration does not contain the first indication information, the terminal retains the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility.

[0094] Of course, the first indication information in the embodiment of the present application may also be other newly added indication information, which is not specifically limited here.

[0095] In another implementation, when the configuration information of the target cell or target cell group includes or is associated with the second indication information, it can be determined based on the second indication information that the configuration parameters of the LTM candidate cell provided by the source CU will be released; or, when the configuration information of the target cell or target cell group does not include or is not associated with the second indication information, it is determined that the configuration parameters of the LTM candidate cell provided by the source CU will be retained.

[0096] In another embodiment, when the configuration information of the target cell or the target cell group includes or is associated with the third indication information, it can be determined based on the third indication information that the configuration parameters of the LTM candidate cell provided by the source CU will be retained; or, when the configuration information of the target cell or the target cell group does not include or is not associated with the third indication information, it is determined that the configuration parameters of the LTM candidate cell provided by the source CU will be released.

[0097] In another embodiment, when the configuration information of the target cell or the target cell group contains or is associated with a first identifier, the first identifier can be compared with the second identifier in the configuration information of the source cell before the switch. If the two are the same, it is determined to retain the configuration parameters of the LTM candidate cell provided by the source CU; if they are different, it is determined to release the configuration parameters of the LTM candidate cell provided by the source CU.

[0098] Among them, the first identifier and the second identifier can be identifiers or parameters of the same type, the difference being that the first identifier is an identifier or parameter included or associated with the configuration information of the target cell or target cell group, and the second identifier is an identifier or parameter included or associated with the configuration information of the source cell.

[0099] For ease of explanation, the first identifier and the second identifier may be collectively referred to as the target identifier, and the target identifiers in the cell configurations provided by different CUs may be different. At this time, the first identifier and the second identifier match or are the same, which may indicate that the target cell configuration and the source cell configuration are provided by the same CU, that is, the source CU and the target CU are the same; the first identifier and the second identifier do not match or are not the same, which may indicate that the target cell configuration and the source cell configuration are provided by different CUs, that is, the source CU and the target CU are different.

[0100] Optionally, the first identifier may be an identifier of the target CU, and the second identifier may be an identifier of the source CU.

[0101] It is worth noting that when the terminal performs cell switching or change, the cell actually switched or changed may be at least one of PCell and PSCell. At this time, the terminal determines the configuration parameters of the first cell to be released or retained based on the configuration information of the target cell or target cell group. It may be that the terminal determines the configuration parameters of the LTM candidate cell to be released or retained for switching of the same cell type based on the type of cell actually switched or changed.

[0102] Optionally, the terminal determines, according to the configuration information of the target cell or the target cell group, configuration parameters of the first cell to be released or retained, including:

[0103] When the terminal switches to the target PCell based on the first information, determining, according to the configuration information of the target PCell, configuration parameters of the LTM candidate cells that are released or reserved and used for PCell switching;

[0104] When the terminal switches to a target MCG based on the first information, the terminal determines, according to the configuration information of the target MCG, configuration parameters of the LTM candidate cells that are released or reserved and used for MCG mobility;

[0105] When the terminal switches to a target PSCell based on the first information, determining, according to the configuration information of the target PSCell, configuration parameters of a released or reserved LTM candidate cell for PSCell switching;

[0106] When the terminal switches to the target SCG based on the first information, the terminal determines the configuration parameters of the LTM candidate cells that are released or retained and used for SCG mobility according to the configuration information of the target SCG.

[0107] For example: when the terminal switches PCell, the terminal determines to release or retain the configuration parameters of the LTM candidate cell used for PCell handover (PCell handover) / MCG mobility (MCG mobility) based on at least one of the first indication information, the second indication information, the third indication information and the first identifier contained in or associated with the configuration information of the target PCell / MCG applied after the switch; when the terminal changes PSCell, the terminal determines to release or retain the configuration parameters of the LTM candidate cell used for PSCell handover / SCG mobility based on at least one of the first indication information, the second indication information, the third indication information and the first identifier contained in or associated with the configuration information of the target PSCell / SCG applied after the switch.

[0108] In this implementation, in view of the fact that the type of the target cell or target cell group is not fixed, the terminal can determine the type of configuration parameters of the LTM candidate cell to be retained or released based on the type of the target cell configuration or target cell group configuration actually switched or changed, and based on the target cell configuration or target cell group configuration. For the configuration parameters of the LTM candidate cell that are different from the type of the target cell configuration or target cell group configuration actually switched or changed, they can be retained by default.

[0109] In some embodiments, the target cell or target cells are the target primary cell, target primary cell group, target primary secondary cell or target primary secondary cell group after cell switching based on at least one of the L3 switching command, RRC reconfiguration message, CHO candidate cell configuration, and CPC candidate cell configuration.

[0110] In contrast, the source cell in the embodiments of the present application is a source main cell, a source main cell group, a source main auxiliary cell or a source main auxiliary cell group before cell switching based on at least one of the L3 switching command, the RRC reconfiguration message, the CHO candidate cell configuration, and the CPC candidate cell configuration.

[0111] It should be noted that in the process of cell switching based on at least one of the CHO candidate cell configuration and the CPC candidate cell configuration, there will be one or more candidate PCell configurations or candidate PSCell configurations. The terminal selects the candidate cell that meets the execution conditions as the target cell according to the execution conditions of the CHO candidate cell configuration or the CPC candidate cell configuration. At this time, each candidate PCell configuration or candidate PSCell configuration contains or is associated with at least one of the above-mentioned first indication information, second indication information, third indication information and first identification.

[0112] In an embodiment of the present application, when the terminal performs cell switching based on at least one of the L3 switching command, the RRC reconfiguration message, the CHO candidate cell configuration, and the CPC candidate cell configuration, the terminal may switch to an inter-CU cell or switch to an intra-CU cell, wherein for inter-CU cell switching, it is necessary to release the configuration parameters of the LTM candidate cell provided by the source CU, and for intra-CU cell switching, the configuration parameters of the LTM candidate cell provided by the source CU may be retained. In an embodiment of the present application, the terminal can autonomously determine whether to release the configuration parameters of the LTM candidate cell provided by the source CU or to retain the configuration parameters of the LTM candidate cell provided by the source CU based on the configuration information of the target cell or the target cell group.

[0113] As an optional implementation manner, the configuration parameter of the first cell includes at least one of the following:

[0114] an L1 measurement configuration associated with the first cell;

[0115] The configuration used by the terminal when performing LTM switching to the corresponding candidate cell;

[0116] A Physical Random Access Channel (RACH) configuration associated with the first cell.

[0117] The RACH configuration associated with the first cell may be used for early timing advance acquisition (early Timing Advance acquisition, early TA acquisition).

[0118] Considering that the LTM candidate cell configuration used by the terminal when executing LTM access to the corresponding candidate cell may also be associated with the L1 measurement configuration or RACH configuration, when the LTM candidate cell configuration fails, its associated L1 measurement configuration or RACH configuration may also fail. In this implementation, the configuration parameters of the released or retained LTM candidate cell may include the LTM candidate cell configuration, and may also include the L1 measurement configuration and RACH configuration associated with the LTM candidate cell configuration. In this way, when the LTM candidate cell configuration fails, the terminal will not continue to retain the failed L1 measurement configuration and RACH configuration associated with the configuration of the LTM candidate cell, so that the terminal has resources to save other valid configurations, thereby improving the utilization rate of terminal resources.

[0119] As an optional implementation manner, before the terminal switches to the target cell or the target cell group based on the first information, the method further includes:

[0120] The terminal receives second information, wherein the second information includes at least one of the following:

[0121] LTM candidate cell configuration for primary cell PCell change;

[0122] LTM candidate cell configuration for master cell group MCG mobility;

[0123] LTM candidate cell configuration for primary and secondary cell PSCell change;

[0124] LTM candidate cell configuration for secondary cell group SCG mobility.

[0125] In this implementation, the terminal pre-receives and saves the second information sent by the network side device. When a cell switch is subsequently performed based on at least one of the L3 switching command, RRC reconfiguration message, CHO candidate cell configuration, and CPC candidate cell configuration, it can determine whether to release or retain the same type of LTM candidate cell configuration based on the switched cell type or cell group type.

[0126] For example: when PCell / MCG switching is performed based on at least one of the L3 switching command, RRC reconfiguration message, CHO candidate cell configuration, and CPC candidate cell configuration, it can be determined whether to release the LTM candidate cell configuration used for PCell change / MCG movement based on the configuration information of the target PCell / MCG after switching; and for the LTM candidate cell configuration used for PSCell change / SCG movement, all of them can be retained.

[0127] Another example: when PSCell / SCG switching is performed based on at least one of the L3 switching command, RRC reconfiguration message, CHO candidate cell configuration, and CPC candidate cell configuration, it can be determined whether to release the LTM candidate cell configuration used for PSCell change / SCG movement based on the configuration information of the target PSCell / SCG after switching; and for the LTM candidate cell configuration used for PCell change / MCG movement, all of them can be retained.

[0128] As an optional implementation manner, the terminal switching to the target cell or the target cell group based on the first information includes:

[0129] When determining that the first configuration in the first information satisfies a first execution condition, the terminal switches to a target cell or a target cell group associated with the first execution condition.

[0130] Optionally, the first configuration may be a conditional configuration in the first information, i.e., a candidate cell configuration. In this case, the first execution condition may be an execution condition of the conditional configuration. Only when the first execution condition is met, the terminal will use the configuration information of the target cell or target cell group associated with the first execution condition in the first configuration.

[0131] For example, the first configuration includes at least one of the following:

[0132] First CHO candidate cell configuration for primary cell change or primary cell group movement;

[0133] Conditional primary and secondary cells change CPC candidate cell configuration;

[0134] a second CHO configuration associated with the SCG configuration;

[0135] A third CHO configuration associated with a conditional PSCell add or change CPAC configuration.

[0136] It should be noted that the type of the target cell associated with the satisfied first execution condition may be at least one of PCell and PSCell, or the type of the target cell group associated with the satisfied first execution condition may be at least one of MCG and SCG.

[0137] For example, when the first configuration includes a first CHO candidate cell configuration, if the execution condition of the first CHO candidate cell configuration is met, the first type of cell may be a PCell, and the second type of cell group may be an MCG.

[0138] For another example: in the case where the first configuration includes a CPC candidate cell configuration, if the execution condition of the CPC candidate cell configuration is met, the first type of cell may be a PSCell, and the second type of cell group may be an SCG.

[0139] Another example: in the case where the first configuration includes the second CHO configuration, given that the candidate MCG configuration in the second CHO configuration is also associated with the candidate SCG configuration, the UE switches to the target MCG and the target SCG at the same time after the execution condition of the second CHO configuration is met. At this time, the first type of cell may include PCell and PSCell, and the second type of cell group may include MCG and SCG.

[0140] As another example: in the case where the first configuration includes the third CHO configuration, given that the candidate MCG configuration in the third CHO configuration is also associated with one or more candidate SCG configurations, and the terminal needs to separately determine whether the execution conditions of the third CHO configuration and the CPAC execution conditions of the PSCell configuration associated with the candidate cell in the third CHO configuration are met, if the third CHO configuration and its associated CPAC execution conditions are both met, then switch to the target MCG and the target SCG at the same time. At this time, the first type of cell may include PCell and PSCell, and the second type of cell group may include MCG and SCG.

[0141] At this time, the configuration parameters of the LTM candidate cells to be released or retained for switching of the same type of cells or cell groups can be determined based on the type of the target cell or target cell group where the switching actually occurs. For example: when the types of the target cells where the switching actually occurs include PCell and PSCell, and the types of the target cell groups where the switching actually occurs include MCG and SCG, the configuration parameters of the LTM candidate cells to be released or retained for PCell switching / MCGmobility can be determined based on the configuration information of the target PCell / target MCG, and the configuration parameters of the LTM candidate cells to be released or retained for PSCell switching / SCG mobility can be determined based on the configuration information of the target PSCell / target SCG.

[0142] It should be noted that, in this implementation, in view of the fact that the type of the target cell or target cell group is not fixed, the configuration parameters for the first cell of the same type to be retained or released can be determined based on the type of the target cell or target cell group that is actually switched or changed, based on at least one of the first indication information, the second indication information, the third indication information and the first identifier in the configuration information of the target cell or target cell group. As for the configuration parameters for the first cell of a type different from that of the target cell or target cell group that is actually switched or changed, they can be retained by default.

[0143] As an optional implementation manner, when the first information is the RRC reconfiguration message, the terminal determines the configuration parameters of the first cell to be released or retained according to the configuration information of the target cell or the target cell group, including:

[0144] In a case where the RRC reconfiguration message includes the first indication information, the terminal determines to release the configuration parameters of the LTM candidate cell saved by the terminal;

[0145] In a case where the RRC reconfiguration message does not include the first indication information, the terminal determines to retain the configuration parameters of the LTM candidate cell saved by the terminal;

[0146] In a case where the RRC reconfiguration message includes or is associated with the second indication information, the terminal determines to release the configuration parameters of the LTM candidate cell saved by the terminal;

[0147] In a case where the RRC reconfiguration message does not include or is not associated with the second indication information, the terminal determines to retain the configuration parameters of the LTM candidate cell saved by the terminal;

[0148] In a case where the RRC reconfiguration message includes or is associated with the third indication information, the terminal determines to retain the configuration parameters of the LTM candidate cell saved by the terminal; or,

[0149] In a case where the RRC reconfiguration message does not include or is not associated with the third indication information, the terminal determines to release the configuration parameters of the LTM candidate cell saved by the terminal.

[0150] In this embodiment, when the terminal switches or changes the cell based on the RRC reconfiguration message from the network side device, the RRC reconfiguration message directly indicates the configuration information of the target cell or target cell group, and determines the configuration parameters of the first cell to be retained or released based on at least one of the first indication information, the second indication information, the third indication information and the first identifier in the configuration information of the target cell or the target cell group.

[0151] It is worth mentioning that, given that the type of the target cell or target cell group switched indicated by the RRC reconfiguration message is not fixed, the configuration parameters for the first cell of the same type to be retained or released can be determined based on the type of the target cell or target cell group actually switched or changed, based on at least one of the first indication information, the second indication information, the third indication information and the first identifier in the configuration information of the target cell or target cell group. As for the configuration parameters for the first cell of a type different from that of the target cell or target cell group actually switched or changed, they can be retained by default.

[0152] As an optional implementation manner, before the terminal determines, according to the configuration information of the target cell or the target cell group, the configuration parameters of the first cell to be released or retained, further comprising:

[0153] The terminal receives configuration information of a second cell from a network side device, where the second cell includes at least one of a target cell, a target cell group, a candidate cell, and a candidate cell group, and the configuration information of the second cell includes or is associated with at least one of the following:

[0154] first indication information, wherein the first indication information indicates to change the key;

[0155] second indication information, where the second indication information indicates to release configuration parameters of the LTM candidate cell;

[0156] third indication information, wherein the third indication information indicates to retain the configuration parameters of the LTM candidate cell;

[0157] First identification.

[0158] In one implementation, the second cell may be a target cell or a target cell group indicated in an L3 handover command or an RRC reconfiguration message sent by a network side device.

[0159] In another implementation, the second cell is a candidate cell or a candidate cell group corresponding to the CHO candidate cell configuration or the CPC candidate cell configuration sent by the network side device. At this time, the number of candidate cells or candidate cell groups can be one or more, and the configuration information of each candidate cell or candidate cell group can include or be associated with at least one of the above-mentioned first indication information, second indication information, third indication information and first identifier. In this way, when the terminal determines that a candidate cell or candidate cell group meets the execution condition and uses the configuration information of the candidate cell or candidate cell group that meets the execution condition, it determines that the candidate cell or candidate cell group that meets the execution condition is used as the target cell or target cell group.

[0160] In an embodiment of the present application, when the terminal is configured with an LTM candidate cell configuration, if the terminal switches to a target cell or a target cell group based on at least one of an L3 switching command, an RRC reconfiguration message, a CHO candidate cell configuration, and a CPC candidate cell configuration, the terminal can determine whether to release or retain the configuration parameters of the LTM candidate cell according to the configuration information of the target cell or the target cell group. For example: when the terminal performs CHO or CPC or a cell switching based on an L3 switching command or an RRC reconfiguration message, the switching may be an inter-CU switching or an intra-CU switching. At this time, the terminal can determine whether to release or retain the LTM candidate cell configuration provided by the source CU according to the configuration information of the target cell or the target cell group after the switching, thereby reducing the waste of resources caused by retaining redundant LTM candidate cell configurations.

[0161] The embodiment of the present application also provides a method for indicating cell configuration parameters, the execution subject of which is a network side device, and the network side device can be as follows Figure 1 The various types of network side devices 12 listed in, or in addition to such Figure 1 Other network-side devices other than the network-side device types listed in the illustrated embodiment are not specifically limited herein.

[0162] like Figure 4 As shown, the cell configuration parameter indication method performed by the network side device includes the following steps:

[0163] Step 401: The network side device sends configuration information of a second cell to the terminal, wherein the second cell includes at least one of a target cell, a target cell group, a candidate cell, and a candidate cell group, and the configuration information of the second cell includes or is associated with at least one of the following:

[0164] first indication information, wherein the first indication information indicates to change the key;

[0165] second indication information, where the second indication information indicates to release configuration parameters of the LTM candidate cell;

[0166] third indication information, wherein the third indication information indicates to retain the configuration parameters of the LTM candidate cell;

[0167] First identification.

[0168] In some implementations, the second cell may include at least one of a target cell, a target cell group, a candidate cell, and a candidate cell group.

[0169] For example: when the network side device sends an L3 switching command or an RRC reconfiguration message to the terminal to switch the terminal to a target cell or a target cell group, the second cell is the switched target cell or target cell group indicated by the L3 switching command or the RRC reconfiguration message.

[0170] For another example, when the network side device pre-configures the CHO candidate cell configuration or the CPC candidate cell configuration for the terminal, the second cell may include the CHO candidate cell or CPC candidate cell corresponding to each CHO candidate cell configuration or CPC candidate cell configuration.

[0171] In other words, the configuration information of the second cell is included in the first information, and the first information includes at least one of the following: L3 switching command, RRC reconfiguration message, CHO candidate cell configuration, CPC candidate cell configuration.

[0172] It should be noted that the first information, the first cell, the second cell, the configuration parameters of the LTM candidate cell, the first indication information, the second indication information, the third indication information and the first identifier in the embodiment of the present application are the same as those in the embodiment of the present application. Figure 3 The first information, the first cell, the second cell, the configuration parameters of the LTM candidate cell, the first indication information, the second indication information, the third indication information and the first identifier in the method embodiment shown have the same meaning and function, and specific reference may be made to the following. Figure 3 The explanations in the illustrated method embodiment will not be repeated here.

[0173] In one implementation, when the configuration information of the second cell includes the first indication information, it can indicate that the terminal needs to change the key when switching to the second cell. Based on the need to change the key when inter-CU switching occurs, it can implicitly indicate to the terminal that the source cell and the second cell belong to cells provided by different CUs, so that the terminal can determine to release the configuration parameters of the LTM candidate cell provided by the source CU based on the first indication information; or, when the configuration information of the second cell does not include the first indication information, it can indicate that the terminal does not need to change the key when switching to the second cell. Based on the fact that the key does not need to be changed when intra-CU switching occurs, it can implicitly indicate that the source cell and the second cell belong to cells provided by the same CU, and then it can be determined to retain the configuration parameters of the LTM candidate cell provided by the source CU.

[0174] In another implementation, when the configuration information of the second cell includes or is associated with the first identifier, the configuration information of the source cell sent by the network side device to the terminal includes or is associated with the second identifier.

[0175] In this way, the terminal can determine whether the target CU after switching or changing is the same as the source CU before switching or changing based on the comparison or matching of the first identifier and the second identifier. If the source CU is different from the target CU, the configuration parameters of the LTM candidate cell provided by the source CU need to be released; if the source CU is the same as the target CU, the configuration parameters of the LTM candidate cell provided by the source CU can be retained.

[0176] Optionally, the method further comprises:

[0177] The network side device sends second information to the terminal, wherein the second information includes at least one of the following:

[0178] LTM candidate cell configuration for primary cell PCell change;

[0179] LTM candidate cell configuration for master cell group MCG mobility;

[0180] LTM candidate cell configuration for primary and secondary cell PSCell change;

[0181] LTM candidate cell configuration for secondary cell group SCG mobility.

[0182] The cell configuration parameter indication method provided in the embodiment of the present application is similar to Figure 3 The cell configuration parameter determination method shown in FIG. 1 matches the cell configuration parameter determination method shown in FIG. 1 , and the different residences include: Figure 3 The execution subject of the cell configuration parameter determination method shown is a terminal, such as Figure 4 The execution subject of the cell configuration parameter indication method is a network side device. And the network side device executes as follows Figure 4 The cell configuration parameter indication method shown can assist the terminal in determining the configuration parameters of the LTM candidate cell to be released or retained, so as to jointly realize that when the network side device instructs the terminal to perform inter-CU cell switching through the first information, the terminal can autonomously release the configuration parameters of the LTM candidate cell provided by the source CU according to the second information, thereby reducing resource waste.

[0183] In order to facilitate understanding of the cell configuration parameter determination method and the cell configuration parameter indication method provided in the embodiment of the present application, the embodiment of the present application takes the interaction process between the UE and the gNB as an example for explanation:

[0184] The solution in which the terminal determines whether to release the LTM candidate cell configuration of the current cell group (Cell Group, CG) according to the first indication information included in or associated with the target cell configuration is applicable but not limited to the following scenarios:

[0185] Scenario 1

[0186] Step 1: The UE receives at least one LTM candidate cell configuration from the gNB, where the candidate cell configuration is used for PCell handover / MCG mobility;

[0187] Step 2: The UE receives at least one CHO candidate cell configuration from the gNB.

[0188] It should be noted that the execution order of the above steps 1 and 2 can be: execute step 1 first, then execute step 2; or execute step 2 first, then execute step 1; or execute step 1 and step 2 at the same time. The execution order of steps 1 and 2 is not limited here.

[0189] Step 3: The UE evaluates the CHO execution condition. If the condition is met, the UE switches to the target PCell / MCG that meets the condition and uses the configuration of the target PCell / MCG.

[0190] Step 4: If the configuration of the target PCell / MCG includes the first indication information, such as MasterKeyUpdateIE, the terminal releases the saved configuration parameters of the LTM candidate cell for PCell handover / MCG mobility; otherwise, the terminal retains the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility.

[0191] Scenario 2

[0192] Step 1: The UE receives at least one LTM candidate cell configuration from the gNB, where the candidate cell configuration is used for PCell handover / MCG mobility;

[0193] Step 2: The UE receives an RRC reconfiguration message from the gNB, where the RRC reconfiguration message instructs the UE to perform a synchronous reconfiguration (reconfiguration with sync) to complete the cell handover, and the RRC reconfiguration message includes the target PCell / MCG configuration;

[0194] Step 3: If the target PCell / MCG configuration includes the first indication information, such as MasterKeyUpdate IE, the terminal releases the saved configuration parameters of the LTM candidate cell for PCell handover / MCG mobility; otherwise, the terminal retains the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility.

[0195] Scene 3

[0196] Step 1: The UE receives at least one LTM candidate cell configuration from the gNB, where the candidate cell configuration is used for PSCell change / SCG mobility;

[0197] Step 2: The UE receives at least one CPC candidate cell configuration and / or the second CHO configuration and / or the third CHO configuration from the gNB;

[0198] Step 3: The UE evaluates the execution conditions of the CPC candidate cell configuration and / or the second CHO configuration and / or the third CHO configuration. If the conditions are met, the UE switches to the target cell (such as the target PSCell / SCG and / or the target PCell / MCG) that meets the conditions, and applies the target PSCell / SCG configuration and / or the target PCell / MCG mobility configuration associated with the met conditions;

[0199] Step 4. If the target PSCell / SCG configuration includes the first indication information, such as including the sk-Counter IE, or including the sk-Counter IE and the value of the sk-Counter is different from the sk-Counter value currently used by the UE, the terminal releases the configuration parameters of the LTM candidate cell for PSCell change / SCG mobility; otherwise, the terminal retains the configuration parameters of the LTM candidate cell for PSCellchange / SCG mobility.

[0200] It should be noted that when there is a target PCell / MCG mobility configuration that meets the conditions in step 3 and the UE receives the LTM candidate cell configuration for PCell handover / MCG mobility, step 4 may also include: if the target PCell / MCG mobility configuration contains the first indication information, such as MasterKeyUpdate IE, the terminal releases the configuration parameters of the LTM candidate cell for PCell change / MCG mobility; otherwise, the terminal retains the configuration parameters of the LTM candidate cell for PCell change / MCG mobility.

[0201] Scene 4

[0202] Step 1: The UE receives at least one LTM candidate cell configuration from the gNB, where the candidate cell configuration is used for PSCell change / SCG mobility;

[0203] Step 2: The UE receives an RRC reconfiguration message from the gNB, which instructs the UE to perform a synchronous reconfiguration (reconfiguration with sync) to complete the cell handover and includes the target PSCell / SCG configuration;

[0204] Step 3. If the target PSCell / SCG configuration includes the first indication information, such as including the sk-Counter IE, or including the sk-Counter IE and the value of the sk-Counter is different from the sk-Counter value currently used by the UE, the terminal releases the saved configuration parameters of the LTM candidate cell for PSCell change / SCG mobility; otherwise, the terminal retains the configuration parameters of the LTM candidate cell for PSCell change / SCG mobility.

[0205] The solution in which the terminal determines whether to release the LTM candidate cell configuration of the current cell group (Cell Group, CG) according to the second indication information or the third indication information included in or associated with the target cell configuration is applicable but not limited to the following scenarios:

[0206] Scene 5

[0207] Step 1: The UE receives at least one LTM candidate cell configuration from the gNB, where the candidate cell configuration is used for PSCell change / SCG mobility;

[0208] Step 2: The UE receives at least one CHO candidate cell configuration from the gNB, where the CHO candidate cell configuration may include / be associated with the second indication information, or include / be associated with the third indication information;

[0209] Step 3: The UE evaluates the execution conditions of the CHO candidate cell configuration. If the conditions are met, the UE switches to the target PCell / MCG that meets the conditions and uses the configuration of the target PCell / MCG.

[0210] Step 4: The UE performs any of the following operations:

[0211] 1) If the configuration of the target PCell / MCG includes / is associated with the second indication information, the terminal releases the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility; otherwise (i.e., the configuration of the target PCell / MCG does not include / is not associated with the second indication information), the terminal retains the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility;

[0212] 2) If the configuration of the target PCell / MCG includes / is associated with the third indication information, the terminal retains the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility; otherwise (that is, the configuration of the target PCell / MCG does not include / is not associated with the third indication information), the terminal releases the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility.

[0213] Scene 6

[0214] Step 1: The UE receives at least one LTM candidate cell configuration from the gNB, where the candidate cell configuration is used for PSCell change / SCG mobility;

[0215] Step 2: The UE receives an RRC reconfiguration message from the gNB, where the RRC reconfiguration message instructs the UE to perform a synchronous reconfiguration (reconfiguration with sync) to complete the cell handover, and the RRC reconfiguration message includes the target PCell / MCG configuration;

[0216] Step 3: The UE performs any of the following operations:

[0217] 1) If the target PCell / MCG configuration includes / is associated with the second indication information, the terminal releases the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility; otherwise (i.e., the target PCell / MCG configuration does not include / is not associated with the second indication information), the terminal retains the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility;

[0218] 2) If the target PCell / MCG configuration includes / is associated with the third indication information, the terminal retains the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility; otherwise (i.e., the target PCell / MCG configuration does not include / is not associated with the third indication information), the terminal releases the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility.

[0219] Scene 7

[0220] Step 1: The UE receives at least one LTM candidate cell configuration from the gNB, where the candidate cell configuration is used for PSCell change / SCG mobility;

[0221] Step 2: The UE receives at least one CPC candidate cell configuration and / or the second CHO configuration and / or the third CHO configuration from the gNB, wherein the candidate PSCell cell configuration may include / be associated with the second indication information, or include / be associated with the third indication information;

[0222] Step 3: The UE evaluates the execution conditions of the CPC candidate cell configuration and / or the second CHO configuration and / or the third CHO configuration. If the conditions are met, the UE switches to the target PCell / MCG and / or target PSCell / SCG configuration that meets the conditions, and uses the configuration of the target PCell / MCG and / or target PSCell / SCG;

[0223] Step 4: The UE performs any of the following operations:

[0224] 1) If the configuration of the target PSCell / SCG includes / is associated with the second indication information, the terminal releases the configuration parameters of the LTM candidate cell for PSCell handover / SCG mobility; otherwise (that is, the target PSCell / SCG configuration does not include / is not associated with the second indication information), the terminal retains the configuration parameters of the LTM candidate cell for PSCell handover / SCG mobility;

[0225] 2) If the configuration of the target PSCell / SCG includes / is associated with the third indication information, the terminal retains the configuration parameters of the LTM candidate cell for PSCell handover / SCG mobility; otherwise (that is, the target PSCell / SCG configuration does not include / is not associated with the third indication information), the terminal releases the configuration parameters of the LTM candidate cell for PSCell handover / SCG mobility.

[0226] Scene 8

[0227] Step 1: The UE receives at least one LTM candidate cell configuration from the gNB, where the candidate cell configuration is used for PSCell change / SCG mobility;

[0228] Step 2: The UE receives an RRC reconfiguration message from the gNB, where the RRC reconfiguration message instructs the UE to perform a synchronous reconfiguration (reconfiguration with sync) to complete the cell handover, and the RRC reconfiguration message includes the target PSCell / SCG configuration;

[0229] Step 3: The UE performs any of the following operations:

[0230] 1) If the target PSCell / SCG configuration includes / is associated with the second indication information, the terminal releases the configuration parameters of the LTM candidate cell for PSCell handover / SCG mobility; otherwise (that is, the target PSCell / SCG configuration does not include / is not associated with the second indication information), the terminal retains the configuration parameters of the LTM candidate cell for PSCell handover / SCG mobility;

[0231] 2) If the target PSCell / SCG configuration includes / is associated with the third indication information, the terminal retains the configuration parameters of the LTM candidate cell for PSCell handover / SCG mobility; otherwise (that is, the target PSCell / SCG configuration does not include / is not associated with the third indication information), the terminal releases the configuration parameters of the LTM candidate cell for PSCell handover / SCG mobility.

[0232] The solution in which the terminal determines whether to release the LTM candidate cell configuration of the current cell group (Cell Group, CG) according to the first identifier included or associated with the target cell configuration and the second identifier included or associated with the source cell configuration is applicable but not limited to the following scenarios:

[0233] Scene 9

[0234] Step 1: The UE receives at least one LTM candidate cell configuration from the gNB, where the candidate cell configuration is used for PCell handover / MCG mobility;

[0235] Step 2. The UE receives at least one CHO candidate cell configuration from the gNB, where the CHO candidate cell configuration includes / is associated with a first identifier, and the configuration of the UE's source PCell also includes / is associated with a second identifier.

[0236] Step 3: The UE evaluates the CHO execution condition. If the condition is met, the UE switches to the target PCell / MCG that meets the condition and uses the configuration of the target PCell / MCG.

[0237] Step 4. If the first identifier included / associated with the configuration of the target PCell / MCG is the same as the second identifier included / associated with the configuration of the UE source PCell, the terminal retains the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility; otherwise, the terminal releases the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility.

[0238] Scene 10

[0239] Step 1: The UE receives at least one LTM candidate cell configuration from the gNB, where the candidate cell configuration is used for PSCell change / SCG mobility;

[0240] Step 2: The UE receives at least one CPC candidate cell configuration and / or a second CHO configuration and / or a third CHO configuration from the gNB, wherein the candidate PSCell cell configuration includes / is associated with the first identifier, and the configuration of the source PSCell of the UE also includes / is associated with the second identifier;

[0241] Step 3: The UE evaluates the execution conditions of the CPC candidate cell configuration and / or the second CHO configuration and / or the third CHO configuration. If the conditions are met, the UE switches to the target PCell / MCG and / or target PSCell / SCG configuration that meets the conditions, and uses the configuration of the target PCell / MCG and / or target PSCell / SCG;

[0242] Step 4. If the first identifier included / associated with the configuration of the target PSCell / SCG is the same as the second identifier included / associated with the configuration of the UE source PCell, the terminal retains the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility; otherwise, the terminal releases the configuration parameters of the LTM candidate cell for PCell handover / MCG mobility.

[0243] The cell configuration parameter determination method provided in the embodiment of the present application may be executed by a cell configuration parameter determination device. In the embodiment of the present application, the cell configuration parameter determination device executing the cell configuration parameter determination method is taken as an example to illustrate the cell configuration parameter determination device provided in the embodiment of the present application.

[0244] See also Figure 5 The cell configuration parameter determination device 500 provided in the embodiment of the present application may be a device in a terminal. Figure 5 As shown, the cell configuration parameter determination device 500 may include the following modules:

[0245] A switching module 501, configured to switch to a target cell or a target cell group based on the first information;

[0246] A determination module 502 is used to determine configuration parameters of a first cell to be released or retained according to the configuration information of the target cell or the target cell group, where the first cell is a mobile LTM candidate cell triggered by layer L1 or L2 signaling;

[0247] The first information includes at least one of the following: L3 switching command, radio resource control RRC reconfiguration message, conditional switching CHO candidate cell configuration, conditional primary and secondary cell change CPC candidate cell configuration.

[0248] Optionally, the determination module 502 is specifically configured to:

[0249] In a case where the configuration information of the target cell or the target cell group includes first indication information, determining to release the configuration parameters of the first cell, the first indication information indicating to perform a key change;

[0250] When the configuration information of the target cell or the target cell group does not include the first indication information, determine to retain the configuration parameters of the first cell;

[0251] In a case where the configuration information of the target cell or the target cell group includes or is associated with second indication information, determining to release the configuration parameters of the first cell, wherein the second indication information indicates to release the configuration parameters of the LTM candidate cell;

[0252] When the configuration information of the target cell or the target cell group does not include or is not associated with the second indication information, determine to retain the configuration parameters of the first cell;

[0253] In a case where the configuration information of the target cell or the target cell group includes or is associated with third indication information, determining to retain the configuration parameters of the first cell, the third indication information indicating to retain the configuration parameters of the LTM candidate cell;

[0254] When the configuration information of the target cell or the target cell group does not include or is not associated with the third indication information, determine to release the configuration parameters of the first cell;

[0255] In a case where the configuration information of the target cell or the target cell group includes or is associated with a first identifier, the configuration information of the source cell includes or is associated with a second identifier, and the first identifier is the same as the second identifier, determining to retain the configuration parameters of the first cell; or,

[0256] When the configuration information of the target cell or target cell group includes or is associated with a first identifier, the configuration information of the source cell includes or is associated with a second identifier, and the first identifier is different from the second identifier, it is determined to release the configuration parameters of the first cell.

[0257] Optionally, the configuration parameter of the first cell includes at least one of the following:

[0258] an L1 measurement configuration associated with the first cell;

[0259] The configuration used by the terminal when performing LTM switching to the corresponding candidate cell;

[0260] A random access channel RACH configuration associated with the first cell.

[0261] Optionally, the cell configuration parameter determination device 500 further includes:

[0262] The first receiving module is configured to receive second information, wherein the second information includes at least one of the following:

[0263] LTM candidate cell configuration for primary cell PCell change;

[0264] LTM candidate cell configuration for master cell group MCG mobility;

[0265] LTM candidate cell configuration for primary and secondary cell PSCell change;

[0266] LTM candidate cell configuration for secondary cell group SCG mobility.

[0267] Optionally, the determination module 502 is specifically configured to:

[0268] In the case of switching to a target PCell based on the first information, determining, according to the configuration information of the target PCell, configuration parameters of a released or reserved LTM candidate cell for PCell switching;

[0269] In case of switching to a target MCG based on the first information, determining configuration parameters of a released or reserved LTM candidate cell for MCG mobility according to configuration information of the target MCG;

[0270] In the case of switching to a target PSCell based on the first information, determining, according to the configuration information of the target PSCell, configuration parameters of the LTM candidate cells that are released or reserved and used for PSCell switching;

[0271] In case of switching to the target SCG based on the first information, the configuration parameters of the LTM candidate cells to be released or retained and used for SCG mobility are determined according to the configuration information of the target SCG.

[0272] Optionally, the switching module 501 is specifically configured to:

[0273] In case it is determined that the first configuration in the first information satisfies a first execution condition, switching to a target cell or a target cell group associated with the first execution condition.

[0274] Optionally, the first configuration includes at least one of the following:

[0275] First CHO candidate cell configuration for primary cell change or primary cell group movement;

[0276] Conditional primary and secondary cells change CPC candidate cell configuration;

[0277] a second CHO configuration associated with the SCG configuration;

[0278] A third CHO configuration associated with a conditional PSCell add or change CPAC configuration.

[0279] Optionally, when the first information is the RRC reconfiguration message, the determining module 501 is specifically used to:

[0280] In a case where the RRC reconfiguration message includes the first indication information, determining to release the configuration parameters of the LTM candidate cell saved by the terminal;

[0281] In a case where the RRC reconfiguration message does not include the first indication information, determining to retain the configuration parameters of the LTM candidate cell saved by the terminal;

[0282] In a case where the RRC reconfiguration message includes or is associated with the second indication information, determining to release the configuration parameters of the LTM candidate cell saved by the terminal;

[0283] In a case where the RRC reconfiguration message does not include or is not associated with the second indication information, determining to retain the configuration parameters of the LTM candidate cell saved by the terminal;

[0284] In a case where the RRC reconfiguration message includes or is associated with the third indication information, determining to retain the configuration parameters of the LTM candidate cell saved by the terminal; or,

[0285] In a case where the RRC reconfiguration message does not include or is not associated with the third indication information, it is determined to release the configuration parameters of the LTM candidate cell saved by the terminal.

[0286] Optionally, the cell configuration parameter determination device 500 further includes:

[0287] The second receiving module is configured to receive configuration information of a second cell from a network side device, where the second cell includes at least one of a target cell, a target cell group, a candidate cell, and a candidate cell group, and the configuration information of the second cell includes or is associated with at least one of the following:

[0288] first indication information, wherein the first indication information indicates to change the key;

[0289] second indication information, where the second indication information indicates to release configuration parameters of the LTM candidate cell;

[0290] third indication information, wherein the third indication information indicates to retain the configuration parameters of the LTM candidate cell;

[0291] First identification.

[0292] The cell configuration parameter determination device 500 provided in the embodiment of the present application can achieve Figure 3 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0293] The cell configuration parameter indication method provided in the embodiment of the present application can be executed by a cell configuration parameter indication device. In the embodiment of the present application, the cell configuration parameter indication method executed by the cell configuration parameter indication device is taken as an example to illustrate the cell configuration parameter indication device provided in the embodiment of the present application.

[0294] See also Figure 6 The cell configuration parameter indicating device 600 provided in the embodiment of the present application may be a device in a network side device. Figure 6 As shown, the cell configuration parameter indicating device 600 may include the following modules:

[0295] The first sending module 601 is configured to send configuration information of a second cell to the terminal, wherein the second cell includes at least one of a target cell, a target cell group, a candidate cell, and a candidate cell group, and the configuration information of the second cell includes or is associated with at least one of the following:

[0296] first indication information, wherein the first indication information indicates to change the key;

[0297] second indication information, where the second indication information indicates to release configuration parameters of the LTM candidate cell;

[0298] third indication information, wherein the third indication information indicates to retain the configuration parameters of the LTM candidate cell;

[0299] First identification.

[0300] Optionally, when the configuration information of the second cell includes or is associated with the first identifier, the source cell configuration sent by the network side device to the terminal includes or is associated with the second identifier.

[0301] Optionally, the cell configuration parameter indicating device 600 further includes:

[0302] The second sending module is configured to send second information to the terminal, wherein the second information includes at least one of the following:

[0303] LTM candidate cell configuration for primary cell PCell change;

[0304] LTM candidate cell configuration for master cell group MCG mobility;

[0305] LTM candidate cell configuration for primary and secondary cell PSCell change;

[0306] LTM candidate cell configuration for secondary cell group SCG mobility.

[0307] The cell configuration parameter indicating device 600 in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal network side device. Exemplarily, the network side device includes but is not limited to the types of access network devices listed above, etc., and the embodiment of the present application does not specifically limit this.

[0308] The cell configuration parameter indicating device 600 provided in the embodiment of the present application can realize Figure 4 The various processes implemented by the illustrated method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0309] like Figure 7As shown, the embodiment of the present application further provides a communication device 700, including a processor 701 and a memory 702, and the memory 702 stores a program or instruction that can be run on the processor 701. For example, when the communication device 700 is a terminal, the program or instruction is executed by the processor 701 to implement the various steps of the above-mentioned cell configuration parameter determination method embodiment, and can achieve the same technical effect. When the communication device 700 is a network side device, the program or instruction is executed by the processor 701 to implement the various steps of the above-mentioned cell configuration parameter indication method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0310] The embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figure 3 The steps in the method embodiment shown. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Figure 8 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0311] The terminal 800 includes but is not limited to: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809 and at least some of the components of a processor 810.

[0312] Those skilled in the art will appreciate that the terminal 800 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 810 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Figure 8 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0313] It should be understood that in the embodiment of the present application, the input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042, and the graphics processor 8041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 807 includes a touch panel 8071 and at least one of other input devices 8072. The touch panel 8071 is also called a touch screen. The touch panel 8071 may include two parts: a touch detection device and a touch controller. Other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0314] In the embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 801 can transmit the data to the processor 810 for processing; in addition, the radio frequency unit 801 can send uplink data to the network side device. Generally, the radio frequency unit 801 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0315] The memory 809 can be used to store software programs or instructions and various data. The memory 809 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 809 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 809 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0316] The processor 810 may include one or more processing units; optionally, the processor 810 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 810.

[0317] The radio frequency unit 801 is configured to switch to a target cell or a target cell group based on the first information;

[0318] The processor 810 is configured to determine, according to the configuration information of the target cell or the target cell group, configuration parameters of a first cell to be released or retained, where the first cell is a mobile LTM candidate cell triggered by layer L1 or L2 signaling;

[0319] The first information includes at least one of the following: L3 switching command, radio resource control RRC reconfiguration message, conditional switching CHO candidate cell configuration, conditional primary and secondary cell change CPC candidate cell configuration.

[0320] Optionally, the determining, according to the configuration information of the target cell or the target cell group, the configuration parameters of the first cell to be released or retained, performed by the processor 810 includes:

[0321] In a case where the configuration information of the target cell or the target cell group includes first indication information, determining to release the configuration parameters of the first cell, the first indication information indicating to perform a key change;

[0322] When the configuration information of the target cell or the target cell group does not include the first indication information, determine to retain the configuration parameters of the first cell;

[0323] In a case where the configuration information of the target cell or the target cell group includes or is associated with second indication information, determining to release the configuration parameters of the first cell, wherein the second indication information indicates to release the configuration parameters of the LTM candidate cell; or

[0324] When the configuration information of the target cell or the target cell group does not include or is not associated with the second indication information, determine to retain the configuration parameters of the first cell;

[0325] In a case where the configuration information of the target cell or the target cell group includes or is associated with third indication information, determining to retain the configuration parameters of the first cell, the third indication information indicating to retain the configuration parameters of the LTM candidate cell;

[0326] When the configuration information of the target cell or the target cell group does not include or is not associated with the third indication information, determine to release the configuration parameters of the first cell;

[0327] In a case where the configuration information of the target cell or the target cell group includes or is associated with a first identifier, the configuration information of the source cell includes or is associated with a second identifier, and the first identifier is the same as the second identifier, determining to retain the configuration parameters of the first cell; or,

[0328] When the configuration information of the target cell or target cell group includes or is associated with a first identifier, the configuration information of the source cell includes or is associated with a second identifier, and the first identifier is different from the second identifier, it is determined to release the configuration parameters of the first cell.

[0329] Optionally, the configuration parameter of the first cell includes at least one of the following:

[0330] an L1 measurement configuration associated with the first cell;

[0331] The configuration used by the terminal when performing LTM switching to the corresponding candidate cell;

[0332] A random access channel RACH configuration associated with the first cell.

[0333] Optionally, before executing the switching to the target cell or target cell group based on the first information, the radio frequency unit 801 is further configured to:

[0334] Receive second information, wherein the second information includes at least one of the following:

[0335] LTM candidate cell configuration for primary cell PCell change;

[0336] LTM candidate cell configuration for master cell group MCG mobility;

[0337] LTM candidate cell configuration for primary and secondary cell PSCell change;

[0338] LTM candidate cell configuration for secondary cell group SCG mobility.

[0339] Optionally, the terminal determining, according to the configuration information of the target cell or the target cell group, a configuration parameter of the first cell to be released or retained, executed by the processor 810, includes:

[0340] In a case where the terminal switches to a target PCell based on the first information, determining, according to the configuration information of the target PCell, configuration parameters of a released or reserved LTM candidate cell for PCell switching;

[0341] In a case where the terminal switches to a target MCG based on the first information, determining configuration parameters of a released or reserved LTM candidate cell for MCG mobility according to configuration information of the target MCG;

[0342] In a case where the terminal switches to a target PSCell based on the first information, determining, according to the configuration information of the target PSCell, configuration parameters of a released or reserved LTM candidate cell for PSCell switching;

[0343] In the case where the terminal switches to the target SCG based on the first information, the configuration parameters of the LTM candidate cells to be released or retained and used for SCG mobility are determined according to the configuration information of the target SCG.

[0344] Optionally, the first configuration includes at least one of the following:

[0345] First CHO candidate cell configuration for primary cell change or primary cell group movement;

[0346] Conditional primary and secondary cells change CPC candidate cell configuration;

[0347] a second CHO configuration associated with the SCG configuration;

[0348] A third CHO configuration associated with a conditional PSCell add or change CPAC configuration.

[0349] Optionally, when the first information is the RRC reconfiguration message, the determining, according to the configuration information of the target cell or the target cell group, the configuration parameters of the first cell to be released or retained, performed by the processor 810 includes:

[0350] In a case where the RRC reconfiguration message includes the first indication information, determining to release the configuration parameters of the LTM candidate cell saved by the terminal;

[0351] In a case where the RRC reconfiguration message does not include the first indication information, determining to retain the configuration parameters of the LTM candidate cell saved by the terminal;

[0352] In a case where the RRC reconfiguration message includes or is associated with the second indication information, determining to release the configuration parameters of the LTM candidate cell saved by the terminal;

[0353] In a case where the RRC reconfiguration message does not include or is not associated with the second indication information, determining to retain the configuration parameters of the LTM candidate cell saved by the terminal;

[0354] In a case where the RRC reconfiguration message includes or is associated with the third indication information, determining to retain the configuration parameters of the LTM candidate cell saved by the terminal; or,

[0355] In a case where the RRC reconfiguration message does not include or is not associated with the third indication information, it is determined to release the configuration parameters of the LTM candidate cell saved by the terminal.

[0356] Optionally, before the processor 810 executes the step of determining, according to the configuration information of the target cell or the target cell group, the configuration parameter of the first cell to be released or retained, the radio frequency unit 801 is further used to:

[0357] The configuration information of the second cell is received from the network side device, where the second cell includes at least one of a target cell, a target cell group, a candidate cell, and a candidate cell group, and the configuration information of the second cell includes or is associated with at least one of the following:

[0358] first indication information, wherein the first indication information indicates to change the key;

[0359] second indication information, where the second indication information indicates to release configuration parameters of the LTM candidate cell;

[0360] third indication information, wherein the third indication information indicates to retain the configuration parameters of the LTM candidate cell;

[0361] First identification.

[0362] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the following Figure 3 The relevant description of the embodiment of the method for determining the cell configuration parameters shown in the figure achieves the same or corresponding technical effects, and will not be repeated here to avoid repetition.

[0363] The embodiment of the present application also provides a network side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figure 4 The steps of the method embodiment shown. This network side device embodiment corresponds to the above network side device method embodiment, and each implementation process and implementation mode of the above method embodiment can be applied to this network side device embodiment and can achieve the same technical effect.

[0364] Specifically, the embodiment of the present application also provides a network side device. Fig. 9 As shown, the network side device 900 includes: an antenna 901, a radio frequency device 902, a baseband device 903, a processor 904 and a memory 905. The antenna 901 is connected to the radio frequency device 902. In the uplink direction, the radio frequency device 902 receives information through the antenna 901 and sends the received information to the baseband device 903 for processing. In the downlink direction, the baseband device 903 processes the information to be sent and sends it to the radio frequency device 902. The radio frequency device 902 processes the received information and sends it out through the antenna 901.

[0365] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 903, which includes a baseband processor.

[0366] The baseband device 903 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig. 9 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 905 through a bus interface to call the program in the memory 905 to execute the network device operations shown in the above method embodiment.

[0367] The network side device may further include a network interface 906, which is, for example, a Common Public Radio Interface (CPRI).

[0368] Specifically, the network side device 900 of the embodiment of the present application further includes: an instruction or program stored in the memory 905 and executable on the processor 904, and the processor 904 calls the instruction or program in the memory 905 to execute Figure 6 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0369] The embodiment of the present application also provides a readable storage medium on which a program or instruction is stored. When the program or instruction is executed by a processor, the following is implemented: Figure 3 or Figure 4 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0370] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0371] The present application embodiment further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, the processor is used to run a program or instruction, to implement the following Figure 3 or Figure 4 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0372] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0373] The present application embodiment further provides a computer program / program product, wherein the computer program / program product is stored in a storage medium, and the computer program / program product is executed by at least one processor to implement the following Figure 3 or Figure 4 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0374] An embodiment of the present application also provides a communication system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the cell configuration parameter determination method as described above, and the network side device can be used to execute the steps of the cell configuration parameter indication method as described above.

[0375] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0376] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable a terminal or a network-side device to execute the methods described in each embodiment of the present application.

[0377] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. A method for determining cell configuration parameters, It is characterized in that include: The terminal switches to a target cell or a target cell group based on the first information; The terminal determines, according to the configuration information of the target cell or the target cell group, configuration parameters of a first cell to be released or retained, where the first cell is a mobile LTM candidate cell triggered by layer L1 or L2 signaling; The first information includes at least one of the following: L3 switching command, radio resource control RRC reconfiguration message, conditional switching CHO candidate cell configuration, conditional primary and secondary cell change CPC candidate cell configuration.

2. The method according to claim 1, It is characterized in that The terminal determines, according to the configuration information of the target cell or the target cell group, configuration parameters of the first cell to be released or retained, including: In a case where the configuration information of the target cell or the target cell group includes first indication information, the terminal determines to release the configuration parameters of the first cell, and the first indication information indicates to perform a key change; When the configuration information of the target cell or the target cell group does not include the first indication information, the terminal determines to retain the configuration parameters of the first cell; In a case where the configuration information of the target cell or the target cell group includes or is associated with second indication information, the terminal determines to release the configuration parameters of the first cell, and the second indication information indicates to release the configuration parameters of the LTM candidate cell; When the configuration information of the target cell or the target cell group does not include or is not associated with the second indication information, the terminal determines to retain the configuration parameters of the first cell; In a case where the configuration information of the target cell or the target cell group includes or is associated with third indication information, the terminal determines to retain the configuration parameters of the first cell, and the third indication information indicates to retain the configuration parameters of the LTM candidate cell; When the configuration information of the target cell or the target cell group does not include or is not associated with the third indication information, the terminal determines to release the configuration parameters of the first cell; In a case where the configuration information of the target cell or the target cell group includes or is associated with a first identifier, the configuration information of the source cell includes or is associated with a second identifier, and the first identifier is the same as the second identifier, the terminal determines to retain the configuration parameters of the first cell; or, When the configuration information of the target cell or target cell group includes or is associated with a first identifier, the configuration information of the source cell includes or is associated with a second identifier, and the first identifier is different from the second identifier, the terminal determines to release the configuration parameters of the first cell.

3. The method according to claim 1 or 2, It is characterized in that The configuration parameters of the first cell include at least one of the following: an L1 measurement configuration associated with the first cell; The configuration used by the terminal when performing LTM switching to the corresponding candidate cell; A random access channel RACH configuration associated with the first cell.

4. The method according to any one of claims 1 to 3, It is characterized in that Before the terminal switches to the target cell or the target cell group based on the first information, the method further includes: The terminal receives second information, wherein the second information includes at least one of the following: LTM candidate cell configuration for primary cell PCell change; LTM candidate cell configuration for master cell group MCG mobility; LTM candidate cell configuration for primary and secondary cell PSCell change; LTM candidate cell configuration for secondary cell group SCG mobility.

5. The method according to claim 4, It is characterized in that The terminal determines, according to the configuration information of the target cell or the target cell group, configuration parameters of the first cell to be released or retained, including: When the terminal switches to the target PCell based on the first information, determining, according to the configuration information of the target PCell, configuration parameters of the LTM candidate cells that are released or reserved and used for PCell switching; When the terminal switches to a target MCG based on the first information, the terminal determines, according to the configuration information of the target MCG, configuration parameters of the LTM candidate cells that are released or reserved and used for MCG mobility; When the terminal switches to a target PSCell based on the first information, determining, according to the configuration information of the target PSCell, configuration parameters of a released or reserved LTM candidate cell for PSCell switching; When the terminal switches to the target SCG based on the first information, the terminal determines the configuration parameters of the LTM candidate cells that are released or retained and used for SCG mobility according to the configuration information of the target SCG.

6. The method according to claim 2, It is characterized in that The terminal switches to a target cell or a target cell group based on the first information, including: When determining that the first configuration in the first information satisfies a first execution condition, the terminal switches to a target cell or a target cell group associated with the first execution condition.

7. The method according to claim 6, It is characterized in that The first configuration includes at least one of the following: First CHO candidate cell configuration for primary cell change or primary cell group movement; Conditional primary and secondary cells change CPC candidate cell configuration; a second CHO configuration associated with the SCG configuration; A third CHO configuration associated with a conditional PSCell add or change CPAC configuration.

8. The method according to claim 2, It is characterized in that When the first information is the RRC reconfiguration message, the terminal determines, according to the configuration information of the target cell or the target cell group, the configuration parameters of the first cell to be released or retained, including: In a case where the RRC reconfiguration message includes the first indication information, the terminal determines to release the configuration parameters of the LTM candidate cell saved by the terminal; In a case where the RRC reconfiguration message does not include the first indication information, the terminal determines to retain the configuration parameters of the LTM candidate cell saved by the terminal; In a case where the RRC reconfiguration message includes or is associated with the second indication information, the terminal determines to release the configuration parameters of the LTM candidate cell saved by the terminal; In a case where the RRC reconfiguration message does not include or is not associated with the second indication information, the terminal determines to retain the configuration parameters of the LTM candidate cell saved by the terminal; In a case where the RRC reconfiguration message includes or is associated with the third indication information, the terminal determines to retain the configuration parameters of the LTM candidate cell saved by the terminal; or, In a case where the RRC reconfiguration message does not include or is not associated with the third indication information, the terminal determines to release the configuration parameters of the LTM candidate cell saved by the terminal.

9. The method according to any one of claims 2 to 8, It is characterized in that Before the terminal determines, according to the configuration information of the target cell or the target cell group, the configuration parameters of the first cell to be released or retained, the method further includes: The terminal receives configuration information of a second cell from a network side device, where the second cell includes at least one of a target cell, a target cell group, a candidate cell, and a candidate cell group, and the configuration information of the second cell includes or is associated with at least one of the following: first indication information, wherein the first indication information indicates to change the key; second indication information, where the second indication information indicates to release configuration parameters of the LTM candidate cell; third indication information, wherein the third indication information indicates to retain the configuration parameters of the LTM candidate cell; First identification.

10. A method for indicating cell configuration parameters, It is characterized in that include: The network side device sends configuration information of the second cell to the terminal, wherein the second cell includes at least one of a target cell, a target cell group, a candidate cell, and a candidate cell group, and the configuration information of the second cell includes or is associated with at least one of the following: first indication information, wherein the first indication information indicates to change the key; second indication information, where the second indication information indicates to release configuration parameters of the LTM candidate cell; third indication information, wherein the third indication information indicates to retain the configuration parameters of the LTM candidate cell; First identification.

11. The method according to claim 10, It is characterized in that In a case where the configuration information of the second cell includes or is associated with the first identifier, the source cell configuration sent by the network side device to the terminal includes or is associated with the second identifier.

12. The method according to claim 10 or 11, It is characterized in that The method further comprises: The network side device sends second information to the terminal, wherein the second information includes at least one of the following: LTM candidate cell configuration for primary cell PCell change; LTM candidate cell configuration for master cell group MCG mobility; LTM candidate cell configuration for primary and secondary cell PSCell change; LTM candidate cell configuration for secondary cell group SCG mobility.

13. A cell configuration parameter determination device, It is characterized in that include: A switching module, configured to switch to a target cell or a target cell group based on the first information; A determination module, configured to determine configuration parameters of a first cell to be released or retained according to configuration information of the target cell or target cell group, wherein the first cell is a mobile LTM candidate cell triggered by layer L1 or L2 signaling; The first information includes at least one of the following: L3 switching command, radio resource control RRC reconfiguration message, conditional switching CHO candidate cell configuration, conditional primary and secondary cell change CPC candidate cell configuration.

14. A cell configuration parameter indicating device, It is characterized in that include: The first sending module is configured to send configuration information of a second cell to the terminal, wherein the second cell includes at least one of a target cell, a target cell group, a candidate cell, and a candidate cell group, and the configuration information of the second cell includes or is associated with at least one of the following: first indication information, wherein the first indication information indicates to change the key; second indication information, where the second indication information indicates to release configuration parameters of the LTM candidate cell; third indication information, wherein the third indication information indicates to retain the configuration parameters of the LTM candidate cell; First identification.

15. A terminal, It is characterized in that The method comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method for determining cell configuration parameters according to any one of claims 1 to 9 are implemented.

16. A network side device, It is characterized in that The method comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the cell configuration parameter indication method according to any one of claims 10 to 12 are implemented.

17. A readable storage medium, It is characterized in that The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the method for determining cell configuration parameters as described in any one of claims 1 to 9 are implemented, or the steps of the method for indicating cell configuration parameters as described in any one of claims 10 to 12 are implemented.

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