Cell switching method and related product

Abstract

Provided are a cell switching method and related products, the method being applied to a user equipment, the method comprising the following steps: in a cell switching process, a UE receiving a layer 1 or layer 2 switching command sent by a network device, the UE determining a layer 2 processing mode for switching from a source cell to a target cell according to the switching command; the layer 2 processing mode comprises a first processing mode or a second processing mode. The technical scheme provided by the invention has the advantage of saving network overhead.

Description

Technical Field

[0001] The present application relates to the field of communication processing technology, and in particular to a cell switching method and related products. Background Art

[0002] In wireless communications, to meet user mobility requirements, the network can enable UE (User Equipment) to access a target cell from a source cell through handover. Once the UE receives a handover command (e.g., RRC (Radio Resource Control) signaling) sent by the network, it accesses the target cell according to the target cell information contained in the handover command.

[0003] However, the existing cell switching based on layer 3 signaling is not smooth, and the user plane interruption delay during the switching process is large. Summary of the Invention

[0004] The embodiments of the present application disclose a cell switching method and related products, which can implement cell switching through layer 1 or layer 2 switching commands, improve the smoothness of cell switching, and reduce the interruption delay of the user plane during the switching process.

[0005] In a first aspect, a cell handover method is provided, the method being applied to a user equipment (UE), the method comprising the following steps:

[0006] During the cell handover process, the UE receives a layer 1 or layer 2 handover command sent by the network device.

[0007] The UE determines, according to the handover command, a layer 2 processing mode for handover from the source cell to the target cell;

[0008] The layer 2 processing method includes: a first processing method or a second processing method.

[0009] In a second aspect, a cell handover method is provided, the method being applied to a network device, the method comprising the following steps:

[0010] During a cell handover process, the network device sends a layer 1 or layer 2 handover command to the UE; the handover command is used to instruct the UE on a layer 2 processing mode for handing over from a source cell to a target cell;

[0011] The processing method includes: a first processing method or a second processing method.

[0012] According to a third aspect, a user equipment is provided, including:

[0013] a communication unit, configured to receive a layer 1 or layer 2 handover command sent by a network device during a cell handover process;

[0014] a processing unit, configured to determine a layer 2 processing mode for switching from a source cell to a target cell according to the handover command;

[0015] The layer 2 processing method includes: a first processing method or a second processing method.

[0016] In a fourth aspect, an electronic device is provided, comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for executing the steps in the method described in the first aspect or the second aspect.

[0017] A fifth aspect provides a chip.

[0018] The chip is used to obtain a layer 1 or layer 2 switching command of a network device;

[0019] The chip is further configured to determine a layer 2 processing mode for switching from a source cell to a target cell according to the handover command;

[0020] The layer 2 processing method includes: a first processing method or a second processing method.

[0021] In a sixth aspect, a chip module is provided, the chip module comprising: a communication component and a chip component;

[0022] The chip component is used to receive a layer 1 or layer 2 switching command of a network device through the communication component;

[0023] The chip component is further configured to determine a layer 2 processing mode for switching from a source cell to a target cell according to the handover command;

[0024] The layer 2 processing method includes: a first processing method or a second processing method.

[0025] A seventh aspect provides a chip.

[0026] The chip is used to output a layer 1 or layer 2 handover command; the handover command is used to instruct the UE to switch from a source cell to a target cell in a layer 2 processing mode;

[0027] The processing method includes: a first processing method or a second processing method.

[0028] In an eighth aspect, a chip module is provided, the chip module comprising: a communication component and a chip component;

[0029] The chip module is used to output a layer 1 or layer 2 handover command; the handover command is used to instruct the UE on a layer 2 processing mode for handing over from a source cell to a target cell;

[0030] The processing method includes: a first processing method or a second processing method;

[0031] The communication component is used to send the switching command.

[0032] In a ninth aspect, a computer-readable storage medium is provided, storing a computer program for electronic data exchange, wherein the computer program enables a computer to execute the method described in the first aspect or the second aspect.

[0033] In a tenth aspect, a computer program product is provided, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a computer to perform some or all of the steps described in the first or second aspect of the embodiments of the present application. The computer program product may be a software installation package.

[0034] In an eleventh aspect, a network device is provided, the network device comprising:

[0035] A communication unit, configured to send a layer 1 or layer 2 handover command to a UE during a cell handover process; the handover command is configured to instruct the UE on a layer 2 processing mode for handing over from a source cell to a target cell;

[0036] The processing method includes: a first processing method or a second processing method.

[0037] The technical solution provided by this application involves a UE receiving a Layer 1 or Layer 2 handover command from a network device during a cell handover process. The UE then determines the Layer 2 processing method for handover from the source cell to the target cell based on the handover command. This maintains the PDCP entity during a cell handover, eliminating the need to reestablish the PDCP entity and reducing reestablishment signaling. Furthermore, maintaining the PDCP entity directly avoids handover discontinuity caused by reestablishing the PDCP entity, thereby improving handover smoothness and reducing user plane interruption latency during the handover process. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The following is an introduction to the drawings used in the embodiments of this application.

[0039] Figure 1 is a system architecture diagram of an example communication system;

[0040] Figure 2 This is a flowchart of a cell switching method provided by the present application;

[0041] Figure 3 1 is a flow chart of a cell switching method provided in Example 1 of the present application;

[0042] Figure 4 1 is a flow chart of a cell switching method provided in Example 2 of the present application;

[0043] Figure 5 This is a flowchart of a cell switching method provided in Example 3 of the present application;

[0044] Figure 6 This is a schematic diagram of the structure of the user equipment provided by this application;

[0045] Figure 7 This is a structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0047] In this application, the term "and / or" simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document indicates that the related objects are in an "or" relationship.

[0048] The "multiple" appearing in the embodiments of this application refers to two or more. The first, second, etc. descriptions appearing in the embodiments of this application are only for illustration and distinction of the described objects. There is no order, nor does it represent a special limitation on the number of devices in the embodiments of this application, and cannot constitute any limitation on the embodiments of this application. The "connection" appearing in the embodiments of this application refers to various connection methods such as direct connection or indirect connection to achieve communication between devices, and the embodiments of this application do not impose any limitation on this.

[0049] The technical solutions of the embodiments of the present application can be applied to Figure 1 The exemplary communication system 100 shown includes a terminal 110 and a network device 120 , wherein the terminal 110 is in communication connection with the network device 120 .

[0050] The terminal in the embodiments of the present application may refer to various forms of UE, access terminal, user unit, user station, mobile station, MS (English: mobile station, Chinese: mobile station), remote station, remote terminal, mobile device, user terminal, terminal equipment (English: terminal equipment), wireless communication equipment, user agent or user device. The terminal equipment may also be a cellular phone, a cordless phone, a SIP (English: session initiation protocol, Chinese: session initiation protocol) phone, a WLL (English: wireless local loop, Chinese: wireless local loop) station, a PDA (English: personal digital assistant, Chinese: personal digital processing), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved PLMN (English: public land mobile network, Chinese: public land mobile communication network), etc., and the embodiments of the present application are not limited to this.

[0051] In NR (new radio), the base station can be implemented in different ways. It can be an independent node that implements all the functions of the base station, or it can be divided into two parts: a centralized unit (CU) and a distribution unit (DU). A CU can be connected to multiple DUs. Usually, the CU handles RRC signaling, while the DU handles layer 1 and layer 2 signaling and data.

[0052] The cell switching mode cannot implement the cell switching through the switching command of layer 1 (eg, physical layer) or layer 2 (eg, MAC (Medium Access Control, Medium Access Control) layer or RLC (Radio Link Control, Radio Link Control) layer).

[0053] In order to implement the switching command of layer 1 and layer 2 to implement the switching of cells, the present application provides a cell switching method, which can be executed by UE. Figure 2 As shown, the following steps are included:

[0054] Step S201: During a cell handover process, the UE receives a layer 1 or layer 2 handover command sent by a network device.

[0055] Step S202: The UE determines a layer 2 processing mode for handover from a source cell to a target cell according to the handover command.

[0056] The layer 2 processing mode includes: a first processing mode (mode 1) or a second processing mode (mode 2).

[0057] The first processing mode may include: maintaining the bearer PDCP (Packet Data Convergence Protocol) entity, maintaining the bearer RLC entity, and maintaining the bearer HARQ process (Hybrid Automatic Repeat request process).

[0058] The second processing method may be: maintaining the PDCP entity, reestablishing the RLC entity, and flushing the HARQ process (i.e., clearing the data in the HARQ process);

[0059] Of course, in practical applications, the first processing method and the second processing method can also be interchanged, for example:

[0060] The first processing method may be: maintaining the PDCP entity, reestablishing the RLC entity and flushing the HARQ process;

[0061] The second processing manner may be: maintaining the bearer's PDCP entity, maintaining the bearer's RLC entity, and maintaining the bearer's HARQ process.

[0062] The technical solution provided by this application involves a UE receiving a Layer 1 or Layer 2 handover command from a network device during a cell handover process. The UE then determines the Layer 2 processing method for handover from the source cell to the target cell based on the handover command. This maintains the PDCP entity during a cell handover, eliminating the need to reestablish the PDCP entity and reducing reestablishment signaling. Furthermore, maintaining the PDCP entity directly avoids handover discontinuity caused by reestablishing the PDCP entity, thereby improving handover smoothness and reducing network overhead and user plane interruption duration.

[0063] In an optional solution, to determine the specific Layer 2 processing mode for a cell, the handover command can include an identifier explicitly indicating the first processing mode or the second processing mode. This explicitly indicates whether Mode 1 or Mode 2 is used for Layer 2 processing. Alternatively, the handover command can directly specify the specific Layer 2 processing, such as reestablishing the RLC entity and flushing the HARQ process.

[0064] In another optional solution, in order to determine the specific processing mode of layer 2 of the cell, the handover command includes: whether the source cell and the target cell belong to the same distribution unit (Intra-DU).

[0065] In another optional solution, determining the processing method of layer 2 may specifically include:

[0066] The UE determines, according to the handover command, a layer 2 processing mode for handover from a source cell to a target cell, specifically including:

[0067] If it is an Intra-DU, the UE determines that the layer 2 processing mode for handover from the source cell to the target cell is the layer 2 processing mode corresponding to the Intra-DU (e.g., mode 1);

[0068] If it does not belong to Intra-DU, the UE determines that the layer 2 processing mode for handover from the source cell to the target cell is the layer 2 processing mode corresponding to non-Intra-DU (for example, mode 2).

[0069] In order to match the target cell with the layer 2 processing mode, in another optional solution, before the handover command, the UE receives a configuration sent by the network device, which may include: a candidate target cell and a layer 2 processing mode corresponding to the cell,

[0070] The UE determines the target cell according to the handover command and applies the layer 2 processing method corresponding to the target cell in the configuration.

[0071] In the above optional solution, the above first processing manner or the second processing manner may also be: maintaining the carried PDCP entity, maintaining the carried RLC entity and flushing the HARQ process.

[0072] Of course, there may also be a third processing method, specifically maintaining the bearer PDCP entity, maintaining the bearer RLC entity and flushing the HARQ process. In this case, the layer 2 processing method is one of the three processing methods.

[0073] In an optional solution, to avoid packet loss of RLC data packets, the above method may further include:

[0074] If the RLC layer of the bearer is in unacknowledged mode, the network device or UE transmits the bearer through the target cell starting from the first RLC data packet that has not been transmitted in the source cell;

[0075] If the RLC layer of the bearer is in confirmed mode, the network device or UE starts transmitting from the first RLC data packet that is not confirmed in the source cell through the target cell.

[0076] To support Figure 2 The cell handover method shown in the figure can also be implemented on the network device side as follows: during the cell handover process, the network device sends a layer 1 or layer 2 handover command to the UE; the handover command is used to instruct the UE to switch from the source cell to the target cell in a layer 2 processing mode;

[0077] The processing method includes: a first processing method or a second processing method.

[0078] The specific definition of the first processing method or the second processing method can be found in Figure 2 The description of the example shown is not repeated here. The specific form of the above switching command can also be found in Figure 2 Description of the illustrated embodiment.

[0079] Example 1

[0080] An embodiment of the present application provides a cell switching method, which is executed between a UE and a network device, and its technical scenario may be: the UE accesses the serving cell Cell1, establishes an RRC connection, and establishes a data radio bearer to start the service. The serving cell configures measurements for the UE so that the UE measures neighboring cells and serving cells and reports measurement reports. The serving cell can make switching decisions based on measurement reports and other factors such as cell load. In order to apply L1 / 2 switching, the serving cell configures a reference signal for neighboring cell measurement such as CSI-RS (channel state information reference signal) for the UE through RRC signaling, and configures the channel state information of the reporting neighboring cells, such as reporting the RSRP (L1 RSRP, reference signal received power), CQI (Channel Quality Index, channel quality index) of the neighboring cells measured by the physical layer. The serving cell usually always configures the UE to report the channel state information of the measured serving cell. After the serving cell obtains the channel state information of the neighboring cells and serving cells measured by the UE, it can make a switching decision based on this. The source cell (i.e., the serving cell) and the target cell in the embodiment of the present application are in the same DU, i.e., the source cell and the target cell are Intra-DU. As Figure 3 As shown, the method may include the following steps:

[0081] Step S301: The network device sends a layer 1 or layer 2 handover command to the UE, where the handover command includes: the source cell and the target cell belong to Intra-DU;

[0082] Step S302: The UE receives a layer 1 or layer 2 handover command, and the UE determines that the layer 2 processing mode is mode 1, that is, maintaining the bearer PDCP entity, maintaining the bearer RLC entity, and maintaining the bearer HARQ process.

[0083] The technical solution provided by this application involves a UE receiving a Layer 1 or Layer 2 handover command from a network device during a cell handover process. The UE then determines a Layer 2 processing method for handover from a source cell to a target cell based on the handover command. This maintains the PDCP entity that carries the data during the cell handover, eliminating the need to reestablish the PDCP entity and reducing reestablishment signaling. Furthermore, directly maintaining the PDCP entity can avoid handover discontinuity caused by reestablishing the PDCP entity, thereby reducing UE interruption delay during the handover process. This improves handover smoothness and reduces network overhead.

[0084] Example 2

[0085] An embodiment of the present application provides a cell switching method, which is executed between a UE and a network device, and its technical scenario may be: the UE accesses the serving cell Cell1, establishes an RRC connection, and establishes a data radio bearer to start the service. The serving cell configures measurements for the UE so that the UE measures neighboring cells and serving cells and reports measurement reports. The serving cell can make switching decisions based on measurement reports and other factors such as cell load. In order to apply L1 / 2 switching, the serving cell configures a reference signal for neighboring cell measurement such as CSI-RS for the UE through RRC signaling, and configures the channel state information for reporting neighboring cells, such as reporting the RSRP (L1 RSRP) and CQI of neighboring cells measured by the physical layer. The serving cell usually always configures the UE to report the channel state information of the serving cell measured. After the serving cell obtains the channel state information of the neighboring cells and serving cells measured by the UE, it can make a switching decision based on this. The source cell (i.e., the serving cell) and the target cell in the embodiment of the present application may be in the same DU or in different UEs, i.e., the source small area target cell may be an Intra-DU or an inter-DU. If Figure 4 As shown, the method may include the following steps:

[0086] Step S401: The network device sends configuration information to the UE, where the configuration information includes: a target cell identifier and a layer 2 processing mode (e.g., mode 2) corresponding to the target cell;

[0087] Step S402: The network device sends a layer 1 or layer 2 handover command to the UE, where the handover command includes: a target cell identifier;

[0088] Step S403: The UE determines the layer 2 processing mode as mode 2 according to the target cell identifier of the handover command, ie, maintaining the PDCP entity, re-establishing the RLC entity and flushing the HARQ process.

[0089] Intra-DU and Inter-DU use different Layer 2 processing methods. This is mainly because in order to maintain the HARQ process during the handover process, the source cell needs to forward all the data cached in the current HARQ process, reception status and other information to the target cell. This requires the network side to complete the exchange of a large amount of data information in a very short time. This is relatively easy to implement for Intra-DU (because it is in the same DU, so the data is sent quickly), but it is very difficult to implement for Inter-DU (because they are not in the same DU, and there is generally no high-speed data transmission channel between different DUs).

[0090] The technical solution provided by this application involves a UE receiving a Layer 1 or Layer 2 handover command from a network device during a cell handover process. The UE then determines the Layer 2 processing method for handover from the source cell to the target cell based on the handover command. This maintains the PDCP entity that carries the data during the cell handover, eliminating the need to reestablish the PDCP entity and reducing reestablishment signaling. Furthermore, directly maintaining the PDCP entity can avoid handover discontinuity caused by reestablishing the PDCP entity, thereby reducing UE interruption delay during the handover process. This improves handover smoothness and reduces network overhead.

[0091] Example 3

[0092] An embodiment of the present application provides a cell switching method, which is executed between a UE and a network device, and its technical scenario may be: the UE accesses the serving cell Cell1, establishes an RRC connection, and establishes a data radio bearer to start the service. The serving cell configures measurements for the UE so that the UE measures neighboring cells and serving cells and reports measurement reports. The serving cell can make switching decisions based on measurement reports and other factors such as cell load. In order to apply L1 / 2 switching, the serving cell configures a reference signal for neighboring cell measurement such as CSI-RS for the UE through RRC signaling, and configures the channel state information for reporting neighboring cells, such as reporting the RSRP (L1 RSRP) and CQI of neighboring cells measured by the physical layer. The serving cell usually always configures the UE to report the channel state information of the serving cell measured. After the serving cell obtains the channel state information of the neighboring cells and serving cells measured by the UE, it can make a switching decision based on this. The source cell (i.e., the serving cell) and the target cell in the embodiment of the present application may be in the same DU or in different UEs, i.e., the source small area target cell may be an Intra-DU or an inter-DU. If Figure 5 As shown, the method may include the following steps:

[0093] Step S501: The network device sends configuration information to the UE, where the configuration information includes: a target cell identifier and a layer 2 processing mode (e.g., mode 1) corresponding to the target cell;

[0094] Step S502: The network device sends a layer 1 or layer 2 handover command to the UE, where the handover command includes: a target cell identifier;

[0095] Step S503: The UE determines the layer 2 processing mode as mode 1 according to the target cell identifier of the handover command, ie, maintaining the bearer PDCP entity, maintaining the bearer RLC entity and flushing the HARQ process.

[0096] Intra-DU and Inter DU use different Layer 2 processing methods, mainly because in order to maintain the HARQ process during the switching process, the source cell needs to forward the data cached in the current HARQ process, reception status and other information to the target cell. This requires the network side to complete the interaction of a large amount of data information in a very short time, which is easier to achieve for Intra-DU (because it is in the same DU, so the data is sent very quickly). For the same DU, depending on the different source cells and target cells, there may still be no high-speed data transmission channel. Therefore, the network equipment needs to directly configure the corresponding Layer 2 processing method according to the target cell, avoiding the conflict between the data channel between the target cell and the source cell and the Layer 2 processing method, which affects the efficiency of cell switching.

[0097] The technical solution provided by this application involves a UE receiving a Layer 1 or Layer 2 handover command from a network device during a cell handover process. The UE then determines the Layer 2 processing method for handover from the source cell to the target cell based on the handover command. This maintains the PDCP entity that carries the data during the cell handover, eliminating the need to reestablish the PDCP entity and reducing reestablishment signaling. Furthermore, directly maintaining the PDCP entity can avoid handover discontinuity caused by reestablishing the PDCP entity, thereby reducing UE interruption delay during the handover process. This improves handover smoothness and reduces network overhead.

[0098] See Figure 6 , Figure 6 A user equipment (UE) is provided, the apparatus comprising:

[0099] The communication unit 601 is configured to receive a layer 1 or layer 2 handover command sent by a network device during a cell handover process;

[0100] A processing unit 602 is configured to determine a layer 2 processing mode for handover from a source cell to a target cell according to the handover command;

[0101] The layer 2 processing method includes: a first processing method or a second processing method.

[0102] The technical solution provided by this application involves a UE receiving a Layer 1 or Layer 2 handover command from a network device during a cell handover process. The UE then determines the Layer 2 processing method for handover from the source cell to the target cell based on the handover command. This maintains the PDCP entity that carries the data during the cell handover, eliminating the need to reestablish the PDCP entity and reducing reestablishment signaling. Furthermore, directly maintaining the PDCP entity can avoid handover discontinuity caused by reestablishing the PDCP entity, thereby reducing UE interruption delay during the handover process. This improves handover smoothness and reduces network overhead.

[0103] The processing unit 602 can also perform the following steps: Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 The optional solutions or detailed solutions in the embodiments will not be described in detail here.

[0104] It is understandable that, in order to realize the above functions, the above-mentioned device includes hardware and / or software modules corresponding to the execution of each function. In combination with the algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application in combination with the embodiments, but such implementation should not be considered to be beyond the scope of this application.

[0105] In this embodiment, the electronic device can be divided into functional modules according to the above-mentioned method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into a single processing module. The above-mentioned integrated modules can be implemented in the form of hardware. It should be noted that the module division in this embodiment is illustrative and is only a logical functional division. In actual implementation, other division methods may be used.

[0106] In the case of dividing each functional module into corresponding functional modules, the above-mentioned communication unit and processing unit can be used to support the user equipment to perform the following operations: Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 The steps shown and Figure 2 、 Figure 3 、 Figure 4 、 Figure 5Refinements or alternatives to the illustrated embodiments.

[0107] It should be noted that all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module and will not be repeated here.

[0108] When integrated units are used, the user device may include a processing module and a storage module. The processing module may be used to control and manage the actions of the user device. For example, it may be used to support the electronic device in executing the steps performed by the acquisition unit, communication unit, and processing unit. The storage module may be used to support the electronic device in executing and storing program code and data.

[0109] The processing module may be a processor or a controller. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, and so on. The storage module may be a memory. The communication module may specifically be a device that interacts with other electronic devices, such as a radio frequency circuit, a Bluetooth chip, or a Wi-Fi chip.

[0110] It is understood that the interface connection relationship between the modules illustrated in the embodiments of the present application is only for illustrative purposes and does not constitute a structural limitation on the user equipment. In other embodiments of the present application, the user equipment may also adopt different interface connection methods from the above embodiments, or a combination of multiple interface connection methods.

[0111] See Figure 7 , Figure 7 An electronic device 70 provided in an embodiment of the present application includes a processor 701, a memory 702, and a communication interface 703. The processor 701, the memory 702, and the communication interface 703 are interconnected via a bus.

[0112] Memory 702 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or compact disc read-only memory (CD-ROM). Memory 702 is used for storing computer programs and data. Communication interface 703 is used to receive and send data.

[0113] The processor 701 may be one or more central processing units (CPUs). In the case where the processor 701 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0114] Processor 701 may include one or more processing units, such as an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU). The different processing units may be independent components or integrated into one or more processors. In some embodiments, a user device may also include one or more processing units. The controller may generate operation control signals based on instruction opcodes and timing signals to control instruction fetching and execution. In other embodiments, a processing unit may also include a memory for storing instructions and data. For example, the memory in the processing unit may be a high-speed cache memory. This memory may store instructions or data that have just been used or are being recycled by the processing unit. If the processing unit needs to use the instruction or data again, it can directly call the instruction or data from the memory. This avoids repeated accesses, reduces the waiting time of the processing unit, and thus improves the efficiency of the user device in processing data or executing instructions.

[0115] In some embodiments, the processor 701 may include one or more interfaces. The interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a SIM card interface and / or a USB interface, etc. Among them, the USB interface is an interface that complies with the USB standard specification, and specifically can be a MiniUSB interface, a Micro USB interface, a USB Type C interface, etc. The USB interface can be used to connect a charger to charge the user device, and can also be used to transmit data between the user device and peripheral devices. The USB interface can also be used to connect headphones to play audio through the headphones.

[0116] If the electronic device 70 is a user device, such as a smart phone, the processor 701 in the electronic device 70 is configured to read the computer program code stored in the memory 702 and perform the following operations:

[0117] During the cell switching process, the network device receives the layer 1 or layer 2 switching command sent by the network device.

[0118] The UE determines, according to the handover command, a layer 2 processing mode for handover from the source cell to the target cell;

[0119] The layer 2 processing method includes: a first processing method or a second processing method.

[0120] Among them, all relevant contents of each scenario involved in the above method embodiment can be referred to the functional description of the corresponding functional module, and will not be repeated here.

[0121] If the electronic device 70 is a network device, such as a base station or an access point, the processor 701 in the electronic device 70 is configured to read the computer program code stored in the memory 702 and perform the following operations:

[0122] During the cell handover process, a layer 1 or layer 2 handover command is sent to the UE; the handover command is used to instruct the UE on the layer 2 processing mode for handover from the source cell to the target cell;

[0123] The processing method includes: a first processing method or a second processing method.

[0124] Among them, all relevant contents of each scenario involved in the above method embodiment can be referred to the functional description of the corresponding functional module, and will not be repeated here.

[0125] This application also provides a chip,

[0126] The chip is used to obtain a layer 1 or layer 2 switching command of a network device;

[0127] The chip is further configured to determine a layer 2 processing mode for switching from a source cell to a target cell according to the handover command;

[0128] The layer 2 processing method includes: a first processing method or a second processing method.

[0129] The above chip can also be used to perform Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 The detailed solutions or optional solutions of the illustrated embodiment will not be described in detail here.

[0130] The present application also provides a chip module, the chip module comprising: a communication component and a chip component;

[0131] The chip component is used to receive a layer 1 or layer 2 switching command of a network device through the communication component;

[0132] The chip component is further configured to determine a layer 2 processing mode for switching from a source cell to a target cell according to the handover command;

[0133] The layer 2 processing method includes: a first processing method or a second processing method.

[0134] The chip assembly can also be used to perform the following Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 The detailed solutions or optional solutions of the illustrated embodiment will not be described in detail here.

[0135] This application also provides a chip,

[0136] The chip is used to output a layer 1 or layer 2 handover command; the handover command is used to instruct the UE to switch from a source cell to a target cell in a layer 2 processing mode;

[0137] The processing method includes: a first processing method or a second processing method.

[0138] The above chip can also be used to perform Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 The detailed solutions or optional solutions of the illustrated embodiment will not be described in detail here.

[0139] The present application also provides a chip module, the chip module comprising: a communication component and a chip component;

[0140] The chip module is used to output a layer 1 or layer 2 handover command; the handover command is used to instruct the UE on a layer 2 processing mode for handing over from a source cell to a target cell;

[0141] The processing method includes: a first processing method or a second processing method;

[0142] The communication component is used to send the switching command.

[0143] The chip assembly can also be used to perform the following Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 The detailed solutions or optional solutions of the illustrated embodiment will not be described in detail here.

[0144] The embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, which, when executed on a network device, Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 The method flow shown is realized.

[0145] The embodiment of the present application further provides a computer program product, which, when executed on a terminal, Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 The method flow shown is realized.

[0146] The above mainly introduces the scheme of the embodiment of the present application from the perspective of the execution process of the method side. It is understandable that, in order to realize the above functions, the electronic device includes a hardware structure and / or software template corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiment provided herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0147] The embodiment of the present application can divide the functional units of the electronic device according to the above method example. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0148] It should be noted that for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and templates involved are not necessarily required by this application.

[0149] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0150] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the above-mentioned units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0151] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0152] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0153] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a memory and includes a number of instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the above-mentioned methods of each embodiment of the present application. The aforementioned memory includes: various media that can store program codes, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0154] Those skilled in the art will appreciate that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program. The program can be stored in a computer-readable memory, and the memory can include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

Claims

1. A cell switching method, characterized in that: The method is applied to a user equipment (UE), and comprises the following steps: receiving a configuration sent by a network device, the configuration including: a candidate target cell identifier, a layer 2 processing mode corresponding to the candidate target cell, and a channel state information reporting configuration of the candidate target cell; Sending the channel state information of the candidate target cell to the network device; receiving a layer 1 or layer 2 handover command indicating a target cell from the network device; Handover to the target cell according to the handover command, and apply a layer 2 processing method corresponding to the target cell, wherein the layer 2 processing method includes: whether to re-establish the carried RLC entity.

2. The method according to claim 1, characterized in that The switching command includes: an identifier corresponding to the layer 2 processing mode.

3. The method according to claim 1, characterized in that Before switching to the target cell according to the handover command and applying the layer 2 processing method corresponding to the target cell, the method further includes: The layer 2 processing mode for switching from the source cell to the target cell is determined according to the switching command.

4. The method according to claim 3, characterized in that The handover command includes whether the source cell and the target cell belong to the same distribution unit Intra-DU.

5. The method according to claim 4, characterized in that The layer 2 processing method of determining handover from the source cell to the target cell according to the handover command specifically includes: If it is an Intra-DU, the UE determines that the Layer 2 processing mode for handover from the source cell to the target cell is the Layer 2 processing mode corresponding to the Intra-DU; If it does not belong to Intra-DU, the UE determines that the layer 2 processing mode for handover from the source cell to the target cell is the layer 2 processing mode corresponding to non-Intra-DU.

6. The method according to claim 1, characterized in that The method further comprises: If the RLC layer of the bearer is in unacknowledged mode, the UE transmits the first RLC data packet that has not been transmitted in the source cell through the target cell; If the RLC layer of the bearer is in confirmed mode, the UE starts transmitting the first RLC data packet that is not confirmed in the source cell through the target cell.

7. The method according to any one of claims 1 to 6, characterized in that The channel state information includes: layer 1 reference signal received power RSRP.

8. The method according to any one of claims 1 to 6, characterized in that The whether to re-establish the bearer RLC entity includes: re-establishing the bearer RLC entity or maintaining the bearer RLC entity.

9. The method according to claim 1, characterized in that The layer 2 processing method also includes: maintaining the carried PDCP entity and flushing the carried HARQ process.

10. A cell switching method, characterized in that: The method is applied to a network device and comprises the following steps: Sending a configuration to the UE, the configuration including: a candidate target cell identifier, a layer 2 processing mode corresponding to the candidate target cell, and a channel state information reporting configuration for the candidate target cell; receiving the channel state information of the candidate target cell sent by the UE; A handover command indicating layer 1 or layer 2 of a target cell is sent to the UE, where the handover command is used to instruct the UE to switch to the target cell according to the handover command and apply a layer 2 processing method corresponding to the target cell, where the layer 2 processing method includes whether to reconstruct the carried RLC entity.

11. The method according to claim 10, characterized in that The channel state information includes: layer 1 reference signal received power RSRP.

12. The method according to claim 10 or 11, characterized in that The whether to re-establish the bearer RLC entity includes: re-establishing the bearer RLC entity or maintaining the bearer RLC entity.

13. The method according to claim 10, characterized in that The layer 2 processing method further includes: maintaining the carried PDCP entity and flushing the carried HARQ process.

14. An electronic device comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, the programs comprising instructions for executing the steps of any one of claims 1 to 9 or instructions for executing the steps of any one of claims 10 to 13.

15. A chip, characterized in that: The chip includes a module for receiving a configuration sent by a network device, wherein the configuration includes: a candidate target cell identifier, a layer 2 processing mode corresponding to the candidate target cell, and a channel state information reporting configuration of the candidate target cell; The chip further includes a module for sending the channel state information of the candidate target cell to the network device; The chip further includes a module for receiving a layer 1 or layer 2 handover command indicating a target cell from the network device; The chip further includes a module for switching to the target cell according to the switching command and applying a layer 2 processing method corresponding to the target cell, where the layer 2 processing method includes whether to re-establish the carried RLC entity.

16. A chip module, characterized in that: The chip module includes: a communication component and a chip component; The chip component is configured to receive a configuration module sent by a network device through the communication component, wherein the configuration includes: a candidate target cell identifier, a layer 2 processing mode corresponding to the candidate target cell, and a channel state information reporting configuration of the candidate target cell; The chip component is further configured to send the channel state information of the candidate target cell to the network device through the communication component; The chip component is further configured to receive, through the communication component, a module for the network device to indicate a layer 1 or layer 2 handover command for a target cell; The chip component is further configured to switch to the target cell according to the switching command and apply a layer 2 processing module corresponding to the target cell, wherein the layer 2 processing module includes whether to re-establish the carried RLC entity.

17. A chip, characterized in that: The chip includes a module for sending a configuration to the UE, wherein the configuration includes: a candidate target cell identifier, a layer 2 processing mode corresponding to the candidate target cell, and a channel state information reporting configuration of the candidate target cell; The chip further includes a module for receiving the channel state information of the candidate target cell sent by the UE; The chip also includes a module for sending a layer 1 or layer 2 switching command indicating the target cell to the UE, wherein the switching command is used to instruct the UE to switch to the target cell according to the switching command and apply the layer 2 processing method corresponding to the target cell. The layer 2 processing method includes: whether to rebuild the carried RLC entity.

18. A chip module, characterized in that: The chip module includes: a communication component and a chip component; The chip module is configured to send a configuration to the UE through the communication component, wherein the configuration includes: a candidate target cell identifier, a layer 2 processing mode corresponding to the candidate target cell, and a channel state information reporting configuration of the candidate target cell; The chip component is further configured to receive, through the communication component, the channel state information of the candidate target cell sent by the UE; The chip component is also used to send a layer 1 or layer 2 switching command indicating the target cell to the UE through the communication component. The switching command is used to instruct the UE to switch to the target cell according to the switching command and apply the layer 2 processing method corresponding to the target cell. The layer 2 processing method includes: whether to rebuild the carried RLC entity.

19. A computer-readable storage medium storing a computer program, which, when executed on a user device, executes the method according to any one of claims 1 to 9 or the method according to any one of claims 10 to 13.

20. A network device, characterized in that: The network equipment includes: a communication unit, configured to send a configuration to the UE, the configuration including: a candidate target cell identifier, a layer 2 processing mode corresponding to the candidate target cell, and a channel state information reporting configuration of the candidate target cell; and receiving the channel state information of the candidate target cell sent by the UE; And used to send a handover command indicating layer 1 or layer 2 of the target cell to the UE, the handover command is used to instruct the UE to switch to the target cell according to the handover command, and apply the layer 2 processing method corresponding to the target cell, the layer 2 processing method including: whether to rebuild the carried RLC entity.

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