Cell handover method, apparatus, terminal and network-side device

Abstract

The application discloses a cell switching method and device, a terminal and a network side equipment, and belongs to the field of mobile communication. The cell switching method of the application comprises the following steps: in the case that layer 1 or layer 2 switching of a first cell group occurs, a terminal acquires target RRC signaling carrying first indication information; wherein the first indication information is used for indicating that the terminal applies configuration associated with the first cell group in the target RRC signaling and configuration associated with the first cell group in subsequently received RRC signaling.

Description

Technical Field

[0001] This application belongs to the field of mobile communication technology, specifically relating to a cell handover method, apparatus, terminal, and network-side equipment. Background Technology

[0002] New Radio (NR) access networks divide base stations, such as gNBs, into Centralized Units (CUs) and Distributed Units (DUs), connected via the F1 interface. A gNB contains only one CU and one or more DUs, with each DU corresponding to one or more cells. The CU contains the Packet Data Convergence Protocol (PDCP) layer and below, including PDCP and Radio Resource Control (RRC) layers. The DU contains the protocol stack below the PDCP layer, including Radio Link Control (RLC), Medium Access Control (MAC), and Physical (PHY) layers.

[0003] When a terminal, also known as a User Equipment (UE), performs a Layer 1 or Layer 2 handover within a Distributed Unit (Intra-DU), the UE's MAC layer may not be reset after the handover to ensure uninterrupted data transmission. However, because the UE's MAC buffer may contain residual Radio Resource Control (RRC) signaling from the source cell, and the UE has already switched to the target cell, errors may occur when applying the configuration in the source cell's RRC signaling. Summary of the Invention

[0004] This application provides a cell handover method, apparatus, terminal, and network-side equipment, which can solve the problem that the configuration in the RRC signaling of the source cell may be applied when the UE has already handed over to the target cell.

[0005] Firstly, a cell handover method is provided for application in a terminal, the method comprising:

[0006] When a Layer 1 or Layer 2 handover occurs in the first cell group, the terminal acquires target RRC signaling carrying first indication information; wherein, the first indication information is used to indicate the configuration associated with the first cell group in the target RRC signaling and the configuration associated with the first cell group in subsequently received RRC signaling.

[0007] Secondly, a cell handover device is provided, comprising:

[0008] The execution module is used to perform Layer 1 or Layer 2 handover for the first cell group;

[0009] A configuration module is used to acquire target RRC signaling carrying first indication information; wherein the first indication information is used to indicate the configuration associated with the first cell group applied in the target RRC signaling, and the configuration associated with the first cell group applied in subsequently received RRC signaling.

[0010] Thirdly, a cell handover method is provided, applied to network-side equipment, the method comprising:

[0011] The network-side equipment initiates a Layer 1 or Layer 2 handover of the first cell group to the terminal;

[0012] After determining that the Layer 1 or Layer 2 handover of the first cell group has been completed, the network-side device sends a target RRC signaling to the terminal; wherein the target RRC signaling carries first indication information, the first indication information being used to indicate the configuration associated with the first cell group in the target RRC signaling and the configuration associated with the first cell group in subsequent RRC signaling.

[0013] Fourthly, a cell handover device is provided, comprising:

[0014] The first transmission module is used to initiate a Layer 1 or Layer 2 handover of the first cell group to the terminal.

[0015] The second transmission module is configured to send a target RRC signaling to the terminal after determining that the layer 1 or layer 2 handover of the first cell group has been completed; wherein the target RRC signaling carries first indication information, the first indication information being used to indicate the configuration associated with the first cell group in the target RRC signaling applied by the terminal, and the configuration associated with the first cell group in subsequent RRC signaling.

[0016] Fifthly, a terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0017] In a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is used to perform Layer 1 or Layer 2 handover of a first cell group, and the communication interface is used to acquire target RRC signaling carrying first indication information.

[0018] In a seventh aspect, a network-side device is provided, the network-side device including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0019] Eighthly, a network-side device is provided, including a processor and a communication interface, wherein the processor is configured to determine that a Layer 1 or Layer 2 handover of the first cell group has been completed, and the communication interface is configured to initiate a Layer 1 or Layer 2 handover of the first cell group to a terminal; and after determining that a Layer 1 or Layer 2 handover of the first cell group has been completed, to send a target RRC signaling to the terminal.

[0020] A ninth aspect provides a cell handover system, comprising: a terminal and a network-side device, wherein the terminal is configured to perform the steps of the cell handover method as described in the first aspect, and the network-side device is configured to perform the steps of the cell handover method as described in the third aspect.

[0021] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the third aspect.

[0022] Eleventhly, a chip is provided, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the third aspect.

[0023] In a 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 cell handover method as described in the first aspect, or to implement the steps of the cell handover method as described in the third aspect.

[0024] In this embodiment of the application, when a Layer 1 or Layer 2 handover of a first cell group occurs, a target RRC signaling carrying first indication information is obtained. The first indication information is used to instruct the terminal to apply the configuration associated with the first cell group in the target RRC signaling, as well as the configuration associated with the first cell group in the subsequently received RRC signaling. This allows the terminal to avoid errors caused by applying the configuration in the RRC signaling of the source cell after handover to the target cell. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a wireless communication system applicable to the embodiments of this application;

[0026] Figure 2 This is a flowchart illustrating a cell handover method provided in an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the structure of a cell handover device provided in an embodiment of this application;

[0028] Figure 4 This is a flowchart illustrating another cell handover method provided in an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of another cell handover device provided in an embodiment of this application;

[0030] Figure 6 This is a schematic diagram of a communication device structure provided in an embodiment of this application;

[0031] Figure 7 A schematic diagram of the structure of a terminal according to an embodiment of this application;

[0032] Figure 8 A schematic diagram of the structure of a network-side device to implement an embodiment of this application. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0034] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0035] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and NR terminology is used in most of the following description; however, these technologies can also be applied to applications beyond NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0036] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. Terminal 11 can be a mobile phone, tablet computer, laptop computer (also known as a notebook computer), personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), smart home (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the specific type of terminal 11 is not limited in this embodiment. Network-side equipment 12 may include access network equipment or core network equipment. Access network equipment 12 may also be referred to as radio access network equipment, radio access network (RAN), radio access network function, or radio access network unit. Access network equipment 12 may include base stations, WLAN access points, or WiFi nodes, etc. Base stations may be referred to as Node B, evolved Node B (eNB), access point, base transceiver station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B node, home evolved B node, Transmitting Receiving Point (TRP), or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that this application embodiment only uses a base station in an NR system as an example for description and does not limit the specific type of base station.Core network equipment may include, but is not limited to, at least one of the following: core network node, core network function, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (or L-NEF), and Binding Support. Core network functions (BSF), application functions (AF), etc. It should be noted that this application embodiment only uses core network equipment in the NR system as an example for description, and does not limit the specific type of core network equipment.

[0037] The cell handover method, apparatus, terminal, and network-side equipment provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0038] like Figure 2 As shown, this application provides a cell handover method, which is executed by a terminal; in other words, the method can be executed by software or hardware installed on the terminal. The method includes the following steps.

[0039] S210. When a Layer 1 or Layer 2 handover occurs in the first cell group, the terminal obtains target RRC signaling carrying first indication information; wherein, the first indication information is used to indicate the configuration associated with the first cell group in the target RRC signaling applied by the terminal, as well as the configuration associated with the first cell group in subsequently received RRC signaling.

[0040] In one implementation, the terminal can receive a Layer 1 or Layer 2 (L1 / L2) handover command from the first cell group, execute an L1 / L2 handover process, and switch from the source cell to the target cell.

[0041] It should be understood that, based on Dual Connectivity (DC) technology, two network nodes are provided to the UE, namely the resources of the access network equipment. One network node is called the Master Node (MN), and the other is called the Secondary Node (SN). At each network node, Carrier Aggregation (CA) technology is used, which configures a series of serving cells controlled by that node for the UE, called a Cell Group (CG). The Master Node controls the Master Cell Group (MCG), and the Secondary Node controls the Secondary Cell Group (SCG). Each cell group contains one Special Cell (SpCell) and a series of Secondary Cells (Scells). In the MCG, the Special Cell is called the Primary Cell (PCell), and in the SCG, the Special Cell is called the Primary Secondary Cell (PSCell). Within a cell group, the SpCell uses the primary carrier, while other secondary cells use secondary carriers. Resource scheduling within a cell group is performed by the SpCell.

[0042] As described above, the first cell group can be either an MCG or an SCG. The L1 / L2 handover process for an MCG is used to hand over the primary cell, while the L1 / L2 handover process for an SCG is used to hand over the primary and secondary cells.

[0043] After completing the L1 / L2 handover of the first cell group, the terminal can retrieve the received RRC signaling from the MAC buffer. The RRC signaling may include the RRC signaling received before or during the handover of the first cell group, which is the RRC signaling of the source cell, and the RRC signaling received after the handover is completed, which is the RRC signaling of the target cell.

[0044] For RRC signaling received before or during L1 / L2 handover, the configuration associated with the first cell group contained therein corresponds to the configuration of the source cell. To avoid applying the configuration corresponding to the source cell after handover, in one embodiment, before obtaining the target RRC signaling, the method further includes:

[0045] After initiating a Layer 1 or Layer 2 handover of the first cell group, the terminal discards the configuration associated with the first cell group in the acquired RRC signaling and applies the configurations associated with other cell groups besides the first cell group. For example, if the first cell group is MCG, the terminal discards the configuration associated with MCG in the acquired RRC signaling; if the first cell group is SCG, the terminal discards the configuration associated with SCG in the acquired RRC signaling. For simplicity, in the following embodiments, the configuration associated with the first cell group can be referred to as Configuration B, and the configurations associated with other cell groups can be referred to as Configuration A.

[0046] Until the terminal acquires the target RRC signaling, and applies configuration B in the target RRC signaling and configuration B in subsequently received RRC signaling based on the first indication information carried in the target RRC signaling, this is equivalent to the terminal applying all configuration parameters in the target RRC signaling and subsequent received RRC signaling after acquiring the target RRC signaling.

[0047] It should be understood that after determining that the L1 / L2 handover of the first cell group has been completed, the network-side device will send a target RRC signaling carrying first indication information to the terminal. Specifically, the target RRC signaling sent by the network-side device may be the first RRC signaling sent to the terminal after determining that the L1 / L2 handover of the first cell group has been completed, carrying the first indication information.

[0048] It should be understood that the terminal can identify the cell group associated with the corresponding configuration based on the cell identifier (ID) or cell group identifier (CellGroupID) carried in the RRC signaling. If the carried cell identifier belongs to the first cell group, or the carried cell group identifier is the identifier of the first cell group, then the configuration is determined as configuration B; otherwise, it is determined as configuration A.

[0049] Optionally, after completing the L1 / L2 handover of the first cell group, the terminal can also obtain Non-Access Stratum (NAS) messages from the MAC buffer. Before obtaining the target RRC signaling, the method further includes: if the first cell group is an MCG, the terminal abandons obtaining the NAS messages; and if the first cell group is an SCG, the terminal applies the NAS messages.

[0050] As can be seen from the technical solutions of the above embodiments, in the case of a Layer 1 or Layer 2 handover of the first cell group, the embodiments of this application obtain target RRC signaling carrying first indication information. The first indication information is used to instruct the terminal to apply the configuration associated with the first cell group in the target RRC signaling, as well as the configuration associated with the first cell group in the subsequently received RRC signaling, so that the terminal avoids errors caused by applying the configuration in the RRC signaling of the source cell after handover to the target cell.

[0051] Based on the above embodiments, optionally, after the terminal discards the configuration associated with the first cell group in the obtained RRC signaling and applies the configuration associated with other cell groups besides the first cell group, the method further includes:

[0052] The terminal sends an RRC reconfiguration complete message to the network-side device.

[0053] After completing the L1 / L2 handover of the first cell group, if configuration B exists in the obtained RRC message, the terminal discards configuration B in the RRC message and applies configuration A in the RRC message instead. Then, it replies to the network-side device with an RRC reconfiguration complete message, which informs the network-side device of the characteristics of the unapproved configuration and / or the reasons why the unapproved configuration was not applied.

[0054] In one implementation, the RRC reconfiguration completion message carries indication information, which indicates at least one of the following:

[0055] Some configurations in the RRC signaling were not applied;

[0056] Some of the configurations in the RRC signaling are applied;

[0057] The configuration associated with the first cell group in the RRC signaling was not applied;

[0058] The configuration associated with cell groups other than the first cell group in the RRC signaling is applied;

[0059] Information explaining why it was not applied.

[0060] As can be seen from the technical solutions of the above embodiments, in this application embodiment, after the terminal discards the configuration associated with the first cell group in the obtained RRC signaling and applies the configuration associated with other cell groups besides the first cell group, it replies to the network-side device with an RRC reconfiguration completion message to notify the network-side device that some configurations have not been applied, so that the network-side device can send the target RRC signaling, thereby enabling the terminal to apply the configuration in the RRC signaling of the target cell in a timely manner after switching to the target cell.

[0061] Based on the above embodiments, optionally, the first indication information is configured based on at least one of the following:

[0062] The terminal, i.e. the first indication information, can be configured separately for each terminal (per UE);

[0063] The target signaling radio bearer (SRB), i.e. the first indication information, can be configured separately for each signaling radio bearer (perSRB);

[0064] The target logical channel (LCH), i.e. the first indication information, can be configured separately for each logical channel (per LCH).

[0065] In one implementation, when the first indication information is configured per UE, the first indication information is used to instruct the corresponding terminal to stop discarding the target RRC signaling and configuration B in the subsequent RRC signaling, that is, to apply all configuration parameters in the target RRC signaling and the subsequent RRC signaling, namely configuration A and configuration B, until L1 / L2 handover is performed again.

[0066] When the first indication information is configured based on the terminal, that is, after the terminal obtains the target RRC signaling carrying the first indication information corresponding to the terminal, it stops discarding the target RRC signaling and the configuration of the first cell group in the subsequent RRC signaling, that is, it applies the configuration associated with all cell groups in the target RRC signaling and the configuration associated with all cell groups in the subsequently received RRC signaling until L1 / L2 handover is performed again.

[0067] In another implementation, when the first indication information is per SRB or per LCH configuration, if the first indication information corresponds to the target SRB or target LCH, the first indication information is used to instruct the terminal to stop discarding the target RRC signaling and the configuration B in the RRC signaling subsequently received through the target SRB or target LCH, that is, to apply all configuration parameters in the target RRC signaling and the RRC signaling subsequently received through the target SRB or target LCH until L1 / L2 handover is performed again.

[0068] When the first indication information is configured based on the target signaling radio bearer or target logical channel, after obtaining the target RRC signaling carrying the first indication information, the terminal applies the configuration associated with all cell groups in the target RRC signaling, as well as the configuration associated with all cell groups in the RRC signaling subsequently received through the target signaling radio bearer or target logical channel, until L1 / L2 handover is performed again.

[0069] Accordingly, for network-side devices, in one embodiment, when the first indication information is configured based on the terminal, the network-side device carries the first indication information in the first RRC signaling sent to the terminal after determining that the L1 / L2 handover of the first cell group has been completed.

[0070] In another implementation, when the first indication information is configured based on the target signaling radio bearer or target logical channel, the network-side device carries the first indication information in the first RRC signaling sent to the terminal through the target signaling radio bearer or target logical channel after determining that the L1 / L2 handover of the first cell group has been completed.

[0071] As can be seen from the technical solutions of the above embodiments, the embodiments of this application can be configured based on the terminal, signaling radio bearer or logical channel through the first indication information, so that the terminal can be flexibly configured after switching to the target cell.

[0072] The cell handover method provided in this application can be executed by a cell handover device. This application uses the example of a cell handover device executing the cell handover method to illustrate the cell handover device provided in this application.

[0073] like Figure 3 As shown, the cell handover device includes an execution module 301 and a configuration module 302.

[0074] The execution module 301 is used to perform a Layer 1 or Layer 2 handover of the first cell group; the configuration module 302 is used to obtain target RRC signaling carrying first indication information; wherein, the first indication information is used to indicate the configuration associated with the first cell group applied in the target RRC signaling, and the configuration associated with the first cell group in subsequently received RRC signaling.

[0075] Optionally, the configuration module 302 is further configured to, after starting the Layer 1 or Layer 2 handover of the first cell group, discard the configuration associated with the first cell group in the obtained RRC signaling, and apply the configuration associated with other cell groups besides the first cell group.

[0076] Optionally, the first cell group is an MCG or an SCG.

[0077] Before acquiring the target RRC signaling, the configuration module 302 is further configured to:

[0078] If the first cell group is an MCG, the acquisition of NAS messages is abandoned;

[0079] or,

[0080] When the first cell group is SCG, the NAS message obtained by the application.

[0081] As can be seen from the technical solutions of the above embodiments, after performing a Layer 1 or Layer 2 handover of the first cell group, the embodiments of this application obtain target RRC signaling carrying first indication information. The first indication information is used to indicate the configuration associated with the first cell group applied in the target RRC signaling, as well as the configuration associated with the first cell group in the subsequently received RRC signaling, so that the cell handover device avoids errors caused by applying the configuration in the RRC signaling of the source cell after handover to the target cell.

[0082] Based on the above embodiments, optionally, the configuration module 302 is further configured to send an RRC reconfiguration complete message to the network-side device.

[0083] Optionally, the RRC reconfiguration completion message carries second indication information, which indicates at least one of the following:

[0084] Some configurations in the RRC signaling were not applied;

[0085] Some of the configurations in the RRC signaling are applied;

[0086] The configuration associated with the first cell group in the RRC signaling was not applied;

[0087] The configuration associated with cell groups other than the first cell group in the RRC signaling is applied;

[0088] Information explaining why it was not applied.

[0089] As can be seen from the technical solutions of the above embodiments, in this application embodiment, after the cell handover device discards the configuration associated with the first cell group in the obtained RRC signaling and applies the configuration associated with other cell groups besides the first cell group, it replies to the network-side device with an RRC reconfiguration completion message to notify the network-side device that some configurations have not been applied, so that the network-side device can send the target RRC signaling, thereby enabling the cell handover device to apply the configuration in the RRC signaling of the target cell in a timely manner after handover to the target cell.

[0090] Based on the above embodiments, optionally, the first indication information is configured based on at least one of the following:

[0091] The cell handover device;

[0092] Target signaling radio bearer;

[0093] Target logical channel.

[0094] Optionally, when the first indication information is configured based on the cell handover device, after obtaining the target RRC signaling carrying the first indication information, the configuration module 302 is further used to configure the association of all cell groups in the target RRC signaling, and the configuration of the association of all cell groups in the subsequently received RRC signaling.

[0095] Optionally, when the first indication information is configured based on the target signaling radio bearer or target logical channel, after obtaining the target RRC signaling carrying the first indication information, the configuration module 302 is further configured to apply the configuration associated with all cell groups in the target RRC signaling, as well as the configuration associated with all cell groups in the RRC signaling subsequently received through the target signaling radio bearer or target logical channel.

[0096] As can be seen from the technical solutions of the above embodiments, the embodiments of this application can be configured based on the cell handover device, signaling radio bearer or logical channel through the first indication information, so that the cell handover device can be flexibly configured after handover to the target cell.

[0097] The cell handover device in this application embodiment can 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 can be a terminal, or other devices besides a terminal. For example, the terminal can include, but is not limited to, the type of terminal 11 listed above; other devices can be servers, network attached storage (NAS), etc., and this application embodiment does not specifically limit the type.

[0098] The cell handover device provided in this application embodiment can achieve... Figure 2 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0099] like Figure 4 As shown, this application embodiment provides a cell handover method. The execution subject of this method is a network-side device; in other words, the method can be executed by software or hardware installed on the network-side device. The method includes the following steps.

[0100] S410, The network-side device initiates a Layer 1 or Layer 2 handover of the first cell group to the terminal;

[0101] S420. After determining that the Layer 1 or Layer 2 handover of the first cell group has been completed, the network-side device sends a target RRC signaling to the terminal; wherein the target RRC signaling carries first indication information, the first indication information being used to indicate the configuration associated with the first cell group in the target RRC signaling applied by the terminal, as well as the configuration associated with the first cell group in subsequent RRC signaling.

[0102] Optionally, the first cell group is an MCG or an SCG.

[0103] Steps S410-S420 can achieve the following: Figure 2 The method embodiments shown are identical to those described above, and the same technical effects are obtained. The repeated parts will not be described again.

[0104] As can be seen from the technical solutions of the above embodiments, this application embodiment initiates a Layer 1 or Layer 2 handover of the first cell group to the terminal; then, after determining that the Layer 1 or Layer 2 handover of the first cell group has been completed, it sends a target RRC signaling to the terminal; wherein, the target RRC signaling carries first indication information, the first indication information being used to instruct the terminal to apply the configuration associated with the first cell group in the target RRC signaling, as well as the configuration associated with the first cell group in the subsequently sent RRC signaling, so that the terminal avoids errors caused by applying the configuration in the RRC signaling of the source cell after handover to the target cell.

[0105] Based on the above embodiments, optionally, after initiating a Layer 1 or Layer 2 handover of the first cell group to the terminal, the method further includes:

[0106] The network-side device receives the RRC reconfiguration complete message from the terminal.

[0107] Optionally, the RRC reconfiguration completion message carries second indication information, which indicates at least one of the following:

[0108] Some configurations in the RRC signaling were not applied;

[0109] Some of the configurations in the RRC signaling are applied;

[0110] The configuration associated with the first cell group in the RRC signaling was not applied;

[0111] The configuration associated with cell groups other than the first cell group in the RRC signaling is applied;

[0112] Information explaining why it was not applied.

[0113] The embodiments of this application can implement the technical solution of the above-mentioned terminal-side method and achieve the same technical effect. The repeated parts will not be described again here.

[0114] As can be seen from the technical solutions of the above embodiments, the embodiments of this application receive an RRC reconfiguration completion message from the terminal to notify the network-side device that some configurations have not been applied, so that the network-side device sends target RRC signaling, thereby enabling the terminal to apply the configuration in the RRC signaling of the target cell in a timely manner after switching to the target cell.

[0115] Based on the above embodiments, optionally, the first indication information is configured based on at least one of the following:

[0116] The terminal;

[0117] Target signaling radio bearer;

[0118] Target logical channel.

[0119] Optionally, when the first indication information is configured based on the terminal, the target RRC signaling is the first RRC signaling sent to the terminal after determining that the Layer 1 or Layer 2 handover of the first cell group has been completed.

[0120] Optionally, when the first indication information is configured based on the target signaling radio bearer or target logical channel, the target RRC signaling is the first RRC signaling sent to the terminal through the target signaling radio bearer or target logical channel after the layer 1 or layer 2 handover of the first cell group is determined to be completed.

[0121] The embodiments of this application can implement the technical solution of the above-mentioned terminal-side method and achieve the same technical effect. The repeated parts will not be described again here.

[0122] As can be seen from the technical solutions of the above embodiments, the embodiments of this application can be configured based on the terminal, signaling radio bearer or logical channel through the first indication information, so that the terminal can be flexibly configured after switching to the target cell.

[0123] The cell handover method provided in this application can be executed by a cell handover device. This application uses the example of a cell handover device executing the cell handover method to illustrate the cell handover device provided in this application.

[0124] like Figure 5 As shown, the cell handover device includes: a first transmission module 501 and a second transmission module 502.

[0125] The first transmission module 501 is used to initiate a Layer 1 or Layer 2 handover of the first cell group to the terminal; the second transmission module 502 is used to send a target RRC signaling to the terminal after determining that the Layer 1 or Layer 2 handover of the first cell group has been completed; wherein, the target RRC signaling carries first indication information, the first indication information being used to indicate that the terminal applies the configuration associated with the first cell group in the target RRC signaling, and the configuration associated with the first cell group in subsequent RRC signaling.

[0126] Optionally, the first cell group is an MCG or an SCG.

[0127] As can be seen from the technical solutions of the above embodiments, this application embodiment initiates a Layer 1 or Layer 2 handover of the first cell group to the terminal; then, after determining that the Layer 1 or Layer 2 handover of the first cell group has been completed, it sends a target RRC signaling to the terminal; wherein, the target RRC signaling carries first indication information, the first indication information being used to instruct the terminal to apply the configuration associated with the first cell group in the target RRC signaling, as well as the configuration associated with the first cell group in the subsequently sent RRC signaling, so that the terminal avoids errors caused by applying the configuration in the RRC signaling of the source cell after handover to the target cell.

[0128] Based on the above embodiments, optionally, the second transmission module is further configured to receive an RRC reconfiguration complete message from the terminal.

[0129] Optionally, the RRC reconfiguration completion message carries second indication information, which indicates at least one of the following:

[0130] Some configurations in the RRC signaling were not applied;

[0131] Some of the configurations in the RRC signaling are applied;

[0132] The configuration associated with the first cell group in the RRC signaling was not applied;

[0133] The configuration associated with cell groups other than the first cell group in the RRC signaling is applied;

[0134] Information explaining why it was not applied.

[0135] As can be seen from the technical solutions of the above embodiments, the embodiments of this application receive an RRC reconfiguration completion message from the terminal to notify that some configurations have not been applied, so that the cell handover device sends target RRC signaling, thereby enabling the terminal to apply the configuration in the RRC signaling of the target cell in a timely manner after handover to the target cell.

[0136] Based on the above embodiments, optionally, the first indication information is configured based on at least one of the following:

[0137] The terminal;

[0138] Target signaling radio bearer;

[0139] Target logical channel.

[0140] Optionally, when the first indication information is configured based on the terminal, the target RRC signaling is the first RRC signaling sent to the terminal after determining that the Layer 1 or Layer 2 handover of the first cell group has been completed.

[0141] Optionally, when the first indication information is configured based on the target signaling radio bearer or target logical channel, the target RRC signaling is the first RRC signaling sent to the terminal through the target signaling radio bearer or target logical channel after the layer 1 or layer 2 handover of the first cell group is determined to be completed.

[0142] As can be seen from the technical solutions of the above embodiments, the embodiments of this application can be configured based on the terminal, signaling radio bearer or logical channel through the first indication information, so that the terminal can be flexibly configured after switching to the target cell.

[0143] The cell handover device in this application embodiment can 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 can be a terminal, or other devices besides a terminal. For example, the terminal can include, but is not limited to, the type of terminal 11 listed above; other devices can be servers, network attached storage (NAS), etc., and this application embodiment does not specifically limit the type.

[0144] The cell handover device provided in this application embodiment can achieve... Figure 4 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0145] Optionally, such as Figure 6 As shown, this application embodiment also provides a communication device 600, including a processor 601 and a memory 602. The memory 602 stores programs or instructions that can run on the processor 601. For example, when the communication device 600 is a terminal, the program or instructions executed by the processor 601 implement the various steps of the above-described cell handover method embodiment and achieve the same technical effect. When the communication device 600 is a network-side device, the program or instructions executed by the processor 601 implement the various steps of the above-described cell handover method embodiment and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0146] This application embodiment also provides a terminal, including a processor and a communication interface. The processor is used to perform Layer 1 or Layer 2 handover of a first cell group, and the communication interface is used to acquire target RRC signaling carrying first indication information. This terminal embodiment corresponds to the above-described terminal-side method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and achieve the same technical effect. Specifically, Figure 7 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0147] The terminal 700 includes, but is not limited to, at least some of the following components: radio frequency unit 701, network module 702, audio output unit 703, input unit 704, sensor 705, display unit 706, user input unit 707, interface unit 708, memory 709, and processor 710.

[0148] Those skilled in the art will understand that the terminal 700 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 710 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 7The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0149] It should be understood that, in this embodiment, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042. The GPU 7041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 706 may include a display panel 7061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, power buttons, etc.), a trackball, a mouse, and a joystick, which will not be described in detail here.

[0150] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 701 can transmit it to the processor 710 for processing; in addition, the radio frequency unit 701 can send uplink data to the network-side device. Typically, the radio frequency unit 701 includes, but is not limited to, an antenna, amplifier, transceiver, coupler, low-noise amplifier, duplexer, etc.

[0151] The memory 709 can be used to store software programs or instructions, as well as various data. The memory 709 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 709 may include volatile memory or non-volatile memory, or both. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 709 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0152] Processor 710 may include one or more processing units; optionally, processor 710 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 710.

[0153] The radio frequency unit 701 is used to acquire target RRC signaling carrying first indication information;

[0154] Processor 710 is configured to perform a Layer 1 or Layer 2 handover of a first cell group; wherein the first indication information is configured to indicate the configuration associated with the first cell group in the target RRC signaling, and the configuration associated with the first cell group in subsequently received RRC signaling.

[0155] Optionally, the processor 710 is further configured to, after starting to perform a Layer 1 or Layer 2 handover of the first cell group, discard the configuration associated with the first cell group in the acquired RRC signaling, and apply the configuration associated with other cell groups besides the first cell group.

[0156] Optionally, the first cell group is an MCG or an SCG.

[0157] Before acquiring the target RRC signaling, the processor 710 is also configured to:

[0158] If the first cell group is an MCG, the acquisition of NAS messages is abandoned;

[0159] or,

[0160] When the first cell group is SCG, the NAS message obtained by the application.

[0161] The embodiments of this application enable the terminal to avoid errors caused by the configuration in the RRC signaling of the source cell after switching to the target cell.

[0162] Based on the above embodiments, optionally, the radio frequency unit 701 is further configured to send an RRC reconfiguration complete message to the network-side device.

[0163] Optionally, the RRC reconfiguration completion message carries second indication information, which indicates at least one of the following:

[0164] Some configurations in the RRC signaling were not applied;

[0165] Some of the configurations in the RRC signaling are applied;

[0166] The configuration associated with the first cell group in the RRC signaling was not applied;

[0167] The configuration associated with cell groups other than the first cell group in the RRC signaling is applied;

[0168] Information explaining why it was not applied.

[0169] The embodiments of this application enable the terminal to promptly apply the configuration in the RRC signaling of the target cell after switching to the target cell.

[0170] Based on the above embodiments, optionally, the first indication information is configured based on at least one of the following:

[0171] The cell handover device;

[0172] Target signaling radio bearer;

[0173] Target logical channel.

[0174] Optionally, when the first indication information is configured based on the terminal, after obtaining the target RRC signaling carrying the first indication information, the processor 710 is further configured to configure all cell group associations in the target RRC signaling, and the configuration of all cell group associations in subsequently received RRC signaling.

[0175] Optionally, when the first indication information is configured based on the target signaling radio bearer or target logical channel, after acquiring the target RRC signaling carrying the first indication information, the processor 710 is further configured to apply the configuration associated with all cell groups in the target RRC signaling, as well as the configuration associated with all cell groups in the RRC signaling subsequently received through the target signaling radio bearer or target logical channel.

[0176] The embodiments of this application enable the terminal to achieve flexible configuration after switching to the target cell.

[0177] This application embodiment also provides a network-side device, including a processor and a communication interface. The processor is used to determine that a Layer 1 or Layer 2 handover of the first cell group has been completed, and the communication interface is used to initiate a Layer 1 or Layer 2 handover of the first cell group to a terminal. After determining that the Layer 1 or Layer 2 handover of the first cell group has been completed, the processor sends a target RRC signaling to the terminal. The target RRC signaling carries first indication information, which indicates that the terminal applies the configuration associated with the first cell group in the target RRC signaling, and the configuration associated with the first cell group in subsequent RRC signaling. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above method embodiments can be applied to this network-side device embodiment and achieve the same technical effects.

[0178] Specifically, embodiments of this application also provide a network-side device. For example... Figure 8 As shown, the network-side device 800 includes: an antenna 81, a radio frequency (RF) device 82, a baseband device 83, a processor 84, and a memory 85. The antenna 81 is connected to the RF device 82. In the uplink direction, the RF device 82 receives information through the antenna 81 and transmits the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes the information to be transmitted and sends it to the RF device 82. The RF device 82 processes the received information and transmits it through the antenna 81.

[0179] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 83, which includes a baseband processor.

[0180] Baseband device 83 may include, for example, at least one baseband board on which multiple chips are disposed, such as... Figure 8 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 85 via a bus interface to call the program in the memory 85 and execute the network device operation shown in the above method embodiment.

[0181] The network-side device may also include a network interface 86, such as a common public radio interface (CPRI).

[0182] Specifically, the network-side device 800 in this embodiment of the invention further includes: instructions or programs stored in a memory 85 and executable on a processor 84, wherein the processor 84 calls the instructions or programs in the memory 85 to execute... Figure 5 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0183] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described cell handover method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0184] The processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0185] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described cell handover method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0186] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0187] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described cell handover method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0188] This application also provides a cell handover system, including: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the cell handover method described above, and the network-side device can be used to perform the steps of the cell handover method described above.

[0189] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0190] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0191] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A cell handover method, characterized in that, include: When a Layer 1 or Layer 2 handover occurs in the first cell group, the terminal acquires target RRC signaling carrying first indication information; wherein, the first indication information is used to indicate the configuration associated with the first cell group in the target RRC signaling and the configuration associated with the first cell group in subsequently received RRC signaling.

2. The method according to claim 1, characterized in that, Before acquiring the target RRC signaling, the method further includes: After the Layer 1 or Layer 2 handover of the first cell group is initiated, the terminal discards the configuration associated with the first cell group in the acquired RRC signaling and applies the configuration associated with other cell groups besides the first cell group.

3. The method according to claim 2, characterized in that, After the terminal discards the configuration associated with the first cell group in the obtained RRC signaling and applies the configurations associated with other cell groups besides the first cell group, the method further includes: The terminal sends an RRC reconfiguration complete message to the network-side device.

4. The method according to claim 3, characterized in that, The RRC reconfiguration completion message carries second indication information, which indicates at least one of the following: Some configurations in the RRC signaling were not applied; Some of the configurations in the RRC signaling are applied; The configuration associated with the first cell group in the RRC signaling was not applied; The configuration associated with cell groups other than the first cell group in the RRC signaling is applied; Information explaining why it was not applied.

5. The method according to claim 2, characterized in that, The first indication information is configured based on at least one of the following: The terminal; Target signaling radio bearer; Target logical channel.

6. The method according to claim 5, characterized in that, When the first indication information is configured based on the terminal, after acquiring the target RRC signaling carrying the first indication information, the method further includes: The terminal applies the configuration associated with all cell groups in the target RRC signaling, as well as the configuration associated with all cell groups in the subsequently received RRC signaling.

7. The method according to claim 5, characterized in that, When the first indication information is configured based on the target signaling radio bearer or target logical channel, after acquiring the target RRC signaling carrying the first indication information, the method further includes: The terminal applies the configuration associated with all cell groups in the target RRC signaling, as well as the configuration associated with all cell groups in the RRC signaling subsequently received through the target signaling radio bearer or target logical channel.

8. The method according to claim 1, characterized in that, The first cell group is either MCG or SCG.

9. The method according to claim 8, characterized in that, Before acquiring the target RRC signaling, the method further includes: When the first cell group is MCG, the terminal abandons the acquisition of NAS messages; or, When the first cell group is SCG, the NAS message obtained by the terminal application.

10. A cell handover device, characterized in that, include: The execution module is used to perform Layer 1 or Layer 2 handover for the first cell group; A configuration module is used to acquire target RRC signaling carrying first indication information; wherein the first indication information is used to indicate the configuration associated with the first cell group applied in the target RRC signaling, and the configuration associated with the first cell group in subsequently received RRC signaling.

11. A cell handover method, characterized in that, include: The network-side equipment initiates a Layer 1 or Layer 2 handover of the first cell group to the terminal; After determining that the Layer 1 or Layer 2 handover of the first cell group has been completed, the network-side device sends a target RRC signaling to the terminal; wherein the target RRC signaling carries first indication information, the first indication information being used to indicate the configuration associated with the first cell group in the target RRC signaling and the configuration associated with the first cell group in subsequent RRC signaling.

12. The method according to claim 11, characterized in that, The first indication information is configured based on at least one of the following: The terminal; Target signaling radio bearer; Target logical channel.

13. The method according to claim 12, characterized in that, When the first indication information is configured based on the terminal, the target RRC signaling is the first RRC signaling sent to the terminal after determining that the Layer 1 or Layer 2 handover of the first cell group has been completed.

14. The method according to claim 12, characterized in that, When the first indication information is configured based on the target signaling radio bearer or target logical channel, the target RRC signaling is the first RRC signaling sent to the terminal through the target signaling radio bearer or target logical channel after the layer 1 or layer 2 handover of the first cell group is determined to be completed.

15. The method according to claim 11, characterized in that, After initiating a Layer 1 or Layer 2 handover of the first cell group to the terminal, the method further includes: The network-side device receives the RRC reconfiguration complete message from the terminal.

16. The method according to claim 15, characterized in that, The RRC reconfiguration completion message carries second indication information, which indicates at least one of the following: Some configurations in the RRC signaling were not applied; Some of the configurations in the RRC signaling are applied; The configuration associated with the first cell group in the RRC signaling was not applied; The configuration associated with cell groups other than the first cell group in the RRC signaling is applied; Information explaining why it was not applied.

17. The method according to claim 11, characterized in that, The first cell group is either MCG or SCG.

18. A cell handover device, characterized in that, include: The first transmission module is used to initiate a Layer 1 or Layer 2 handover of the first cell group to the terminal. The second transmission module is configured to send a target RRC signaling to the terminal after determining that the layer 1 or layer 2 handover of the first cell group has been completed; wherein the target RRC signaling carries first indication information, the first indication information being used to indicate the configuration associated with the first cell group in the target RRC signaling applied by the terminal, and the configuration associated with the first cell group in subsequent RRC signaling.

19. A terminal, characterized in that, It includes a processor and a memory, the memory storing programs or instructions that can run on the processor, the programs or instructions being executed by the processor to implement the steps of the cell handover method as described in any one of claims 1 to 9.

20. A network-side device, characterized in that, It includes a processor and a memory, the memory storing programs or instructions that can run on the processor, the programs or instructions being executed by the processor to implement the steps of the cell handover method as described in any one of claims 11 to 17.

21. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the cell handover method as described in any one of claims 1-9, or implement the steps of the cell handover method as described in any one of claims 11-17.

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