Wireless communication method, terminal device and network device

Abstract

Provided in the present application are a wireless communication method, a terminal device and a network device. The method comprises: a terminal device executing a first operation on the basis of first information, wherein the first information comprises one or more pieces of the following information: network energy-saving (NES) information of a first cell where the terminal device is located, NES information of a second cell, and a first conditional handover threshold related to an NES state of the first cell and / or an NES state of the second cell; and the first operation comprises one or more of the following: determining a cell which meets a conditional handover requirement, determining a first moment at which a handover from the first cell to the second cell is executed, and measuring a third cell within a first time period between a second moment and the first moment, so as to determine whether the third cell meets the conditional handover requirement, the second moment being a moment at which the terminal device determines that the second cell meets the conditional handover requirement. The terminal device may take the first information into consideration when executing a conditional handover, and thus a conditional handover procedure can be optimized whilst taking the energy-saving of a network device into account.

Description

Wireless communication method, terminal device, and network device Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal equipment, and network equipment. Background Art

[0002] During a conditional handover, the terminal device can measure one or more candidate target cells. After receiving the conditional handover configuration, the terminal device can determine whether the candidate target cell meets the conditional handover requirements based on the measurement results of the candidate target cell. If one of the one or more candidate target cells meets the conditional handover requirements, the terminal device can autonomously execute the configuration in the handover command and directly initiate handover access to the target cell that meets the requirements.

[0003] Summary of the Invention

[0004] The present application provides a wireless communication method, terminal device, and network device. The following introduces various aspects of the present application.

[0005] In a first aspect, a method for wireless communication is provided, the method comprising: a terminal device performs a first operation based on first information; wherein the first information comprises one or more of the following information: network energy saving NES information of the first cell where the terminal device is located, NES information of the second cell, and a first conditional switching threshold related to the NES status of the first cell and / or the NES status of the second cell; the first operation comprises one or more of the following: determining a cell that meets the conditional switching requirements; determining a first moment of switching from the first cell to the second cell; and measuring a third cell within a first time period between the second moment and the first moment to determine whether the third cell meets the conditional switching requirements, the second moment being the moment when the terminal device determines that the second cell meets the conditional switching requirements.

[0006] In a second aspect, a method for wireless communication is provided, the method comprising: a network device sending indication information; wherein the indication information comprises second indication information, the second indication information is used to indicate first information, and the first information comprises one or more of the following information: NES information of the first cell where the terminal device is located, NES information of the second cell, and a first conditional switching threshold related to the NES status of the first cell and / or the NES status of the second cell.

[0007] According to a third aspect, a terminal device is provided, comprising: an execution unit for performing a first operation based on first information; wherein the first information comprises one or more of the following information: network energy saving NES information of the first cell where the terminal device is located, NES information of the second cell, and a first conditional switching threshold related to the NES status of the first cell and / or the NES status of the second cell; the first operation comprises one or more of the following: determining a cell that meets the conditional switching requirements; determining a first moment of switching from the first cell to the second cell; and measuring a third cell within a first time period between the second moment and the first moment to determine whether the third cell meets the conditional switching requirements, the second moment being the moment when the terminal device determines that the second cell meets the conditional switching requirements.

[0008] In a fourth aspect, a network device is provided, comprising: a sending unit for sending indication information; wherein the indication information includes second indication information, the second indication information is used to indicate first information, and the first information includes one or more of the following information: NES information of the first cell where the terminal device is located, NES information of the second cell, and a first conditional switching threshold related to the NES status of the first cell and / or the NES status of the second cell.

[0009] In a fifth aspect, a terminal device is provided, comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes part or all of the steps in the method of the first aspect.

[0010] In a sixth aspect, a network device is provided, comprising a processor, a memory, and a transceiver, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the network device executes part or all of the steps in the method of the second aspect.

[0011] In a seventh aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device and / or network device. In another possible design, the system may also include other devices that interact with the terminal device or network device in the solution provided in the embodiment of the present application.

[0012] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a terminal device and / or a network device to execute part or all of the steps in the methods of the above aspects.

[0013] In a ninth aspect, embodiments of the present application provide a computer program product, 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 terminal device and / or a network device to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0014] In the tenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0015] Based on the first information, when performing conditional switching, the terminal device can not only consider the conditional switching requirements, but also consider the network energy saving (NES) information of the source cell, the NES information of the alternative target cell, and one or more of the conditional switching thresholds, thereby optimizing the conditional switching process to take into account the energy saving requirements of the network device and the switching requirements of the terminal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of a wireless communication system used in an embodiment of the present application.

[0017] FIG. 2 is an example diagram of a network device executing NES measures.

[0018] FIG3 is an example diagram of a conditional switching process.

[0019] FIG4 is a schematic flowchart of a wireless communication method provided in an embodiment of the present application.

[0020] FIG5 is a schematic diagram of a scenario to which an embodiment of the present application is applicable.

[0021] FIG6 is a schematic diagram of another scenario to which the embodiment of the present application is applicable.

[0022] FIG7 is a schematic diagram of another scenario to which the embodiment of the present application is applicable.

[0023] FIG8 is a schematic diagram of another scenario to which the embodiment of the present application is applicable.

[0024] FIG9 is a schematic diagram of another scenario to which the embodiment of the present application is applicable.

[0025] FIG10 is a schematic flowchart of another wireless communication method provided in an embodiment of the present application.

[0026] FIG11 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

[0027] FIG12 is a schematic structural diagram of a network device provided in an embodiment of the present application.

[0028] FIG13 is a schematic structural diagram of a device for communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The technical solution in this application will be described below with reference to the accompanying drawings.

[0030] Communication System

[0031] FIG1 illustrates a wireless communication system 100 used in an embodiment of the present application. The wireless communication system 100 may include communication devices. The communication devices may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120.

[0032] FIG1 exemplarily shows a network device and two terminals. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0033] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0034] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0035] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in vehicle-to-everything (V2X) or device-to-device (D2D). For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and smart home devices communicate without relaying the communication signal through a base station.

[0036] The network device in the embodiments of the present application may be a device for communicating with a terminal device. The network device may also include an access network device. The access network device may provide communication coverage for a specific geographical area and may communicate with the terminal device 120 located within the coverage area. The access network device may also be referred to as a radio access network device or a base station. The access network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects the terminal device to a wireless network. Access network equipment can broadly cover various names as follows, or replace the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master eNB (MeNB), secondary eNB (SeNB), multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. A base station may also refer to a communication module, modem, or chip used to be set in the aforementioned device or apparatus. A base station may also be a mobile switching center and a device that performs base station functions in D2D, V2X, and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. A base station may support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the access network device.

[0037] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0038] The communication equipment involved in a wireless communication system can include not only access network equipment and terminal equipment, but also core network elements. Core network elements can be implemented by devices, that is, core network elements are core network devices. It is understood that core network devices can also be a type of network equipment.

[0039] The core network elements in the embodiments of the present application may include network elements that process and forward user signaling and data. For example, the core network equipment may include core network access and mobility management function (AMF), session management function (SMF), user plane gateway, location management function (LMF) and other core network equipment. Among them, the user plane gateway may be a server with functions such as mobility management, routing, and forwarding of user plane data, generally located on the network side, such as a serving gateway (SGW) or a packet data network gateway (PGW) or a user plane network element function entity (UPF). Of course, the core network may also include other network elements, which are not listed here one by one.

[0040] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device may include a CU and a DU. The gNB may also include an AAU.

[0041] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0042] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0043] Network energy saving (NES)

[0044] With the development of technology, some communication systems have begun to consider how to achieve energy conservation in network equipment. Take 5G wireless communication systems as an example. Because 5G wireless communication systems use higher frequency bands and larger bandwidths, 5G network equipment consumes more energy than 4G systems, thereby increasing operators' electricity costs.

[0045] To address this, some communication systems have introduced network energy-saving technologies (such as the network energy-saving technologies proposed in R18) based on their own network characteristics. Based on network energy-saving technologies, network devices can be in power-saving mode or power-saving state for a period of time, that is, this period is a power-saving period. For example, because some communication systems (such as 5G systems) use high frequency bands, the geographical area covered by a cell is relatively small, resulting in a small number of terminals served by the cell. During the non-power-saving period, the NES state of the cell is a power-saving state, and the network device can perform communication-related operations normally. During the power-saving period, the NES state of the cell is a non-power-saving state, and the network device can only perform some of the operations performed during the non-power-saving period to achieve the purpose of saving power. For example, the network device can concentrate the data transmission of terminal devices in a cell during the non-power-saving period, and not transmit data during the power-saving period to achieve energy saving. As shown in Figure 2, the network device divides out a portion of the cell-level time period. During this portion of the time period, the NES state of the cell is a power-saving state, and the network device can not receive uplink data and / or not send downlink data.

[0046] It should be noted that in the example of Figure 2 , the network device does not receive uplink data and does not send downlink data during the same time period. In some embodiments, the time period for not receiving uplink data and the time period for not sending downlink data can be configured independently. That is, these two time periods can be different time periods. However, because downlink data transmission involves uplink hybrid automatic repeat request (HARQ) feedback, network device configuration typically configures these two power-saving behaviors to the same time period.

[0047] It is understandable that, based on the example of FIG. 2 , the network device can concentrate data transmission in a certain time period, thereby achieving the purpose of saving power consumption of the network device.

[0048] Conditional handover (CHO)

[0049] The primary goal of conditional handover is to improve the reliability and robustness of user handovers, addressing issues such as delayed handovers due to lengthy handover preparation times or handover failures caused by a sharp drop in the source cell's channel quality during the handover process. The core concept of conditional handover is to pre-configure the handover command content for the terminal device. The network device corresponding to the source cell (the source network device) can pre-prepare one or more candidate target cells and send them to the terminal device before the source cell's radio signal quality deteriorates. The terminal device can measure one or more candidate target cells. After receiving the conditional handover configuration, the terminal device can determine whether the candidate target cell meets the conditional handover requirements based on the measurement results of the candidate target cell. When one of the one or more candidate target cells meets the conditional handover requirements, the terminal device can autonomously execute the configuration in the handover command and directly initiate handover access to the meeting target cell. Since the terminal device no longer triggers measurement reporting when the handover conditions are met, and the terminal device has already obtained the configuration in the handover command, this solves the aforementioned issue of measurement reporting and incorrect handover command reception. Conditional handover can significantly improve handover success rates, especially in high-speed mobility scenarios or when signals rapidly fade within the handover zone. Furthermore, since the actual handover is determined by the terminal device based on the target cell's wireless channel conditions, the timing of handover in conditional handover can be better aligned with the terminal device's wireless quality.

[0050] The handover process can generally be divided into three phases: handover preparation, handover execution, and handover completion. The following briefly describes the conditional handover process, with reference to Figure 3. The process shown in Figure 3 can be performed by the terminal device, the source network device (i.e., the network device corresponding to the source cell), the target network device (i.e., the network device corresponding to the target cell), other potential target network devices, the AMF, and the UPF(s). For example, the source network device can be the source gNB (source gNB). The target network device can be the target gNB (target gNB). Other potential target network devices can be other potential target gNB(s).

[0051] Phase 1: Handover preparation (step 1 to step 7).

[0052] In step 1, measurement control and reporting are performed between the source network device and the terminal device. Specifically, the source network device triggers the terminal device to perform neighboring cell measurements, so that the terminal device can measure the neighboring cells and report the measurement results to the source network device.

[0053] Before step 1, user data can be transmitted between the terminal device and the source network device. User data can be transmitted between the source network device and the UPF.

[0054] As shown in FIG3 , before step 1, the first stage may further include step 0. In step 0, the AMF provides mobility control information (mobility control information provided by the AMF).

[0055] In step 2, the source network device evaluates the measurement results reported by the terminal device and decides whether to trigger a handover (CHO decision).

[0056] In step 3, if the source network device decides to trigger a handover, it may send a handover request (HANDOVER REQUEST) to the target network device and other candidate target network devices.

[0057] In step 4, after receiving the handover request sent by the source network device, the target network device and other candidate target network devices may start admission control according to the service information carried by the source network device.

[0058] In step 5, if the target network device decides to allow the terminal device to switch in, the target network device may send a HANDOVER REQUEST ACKNOWLEDGE message to the source network device. In addition, other candidate target network devices may also send a HANDOVER REQUEST ACKNOWLEDGE message to the source network device.

[0059] In step 6, the source network device sends an RRC reconfiguration message (RRC reconfiguration) of the candidate target network device to the terminal device.

[0060] In step 7, the terminal device sends an RRC reconfiguration complete message to the source network device. At this point, the handover preparation phase is completed.

[0061] Phase 2: Handover Execution (Step 7a-Step 8)

[0062] After step 7, the terminal device may evaluate the CHO conditions.

[0063] In step 7a, the terminal device sends an EARLY STATUS TRANSFER to other candidate target network devices based on the evaluation result.

[0064] After step 7a, the terminal device detaches from the old cell and synchronizes with the new cell (detach from the old cell, synchronize to the new cell).

[0065] In step 8, the conditional handover is completed (CHO handover completion).

[0066] Phase 3: Handover Completed (Steps 8a to 8c)

[0067] In step 8a, the target network device sends a HANDOVER SUCCESS message to the source network device.

[0068] In step 8b, the source network device may forward the buffered data, the data packets being transmitted, the associated sequence number (SN) of the data, etc. to the target network device via SN STATUS TRANSFER.

[0069] After step 8b, user data can be transmitted between the terminal device and the target network device.

[0070] In step 8c, the source network device sends a HANDOVER CANCEL message to the target network device and other candidate target network devices. At this point, the handover is completed.

[0071] The applicant of this application has discovered that when the network equipment has taken NES measures, the process of conditional switching may be affected by NES. For example, in the process of conditional switching in the related art, the terminal device only considers whether the alternative target cell meets the requirements of conditional switching. When a certain alternative target cell meets the requirements of conditional switching, the terminal device will immediately switch to the cell. If the target cell is in a power-saving time period, the terminal device will not be able to send data immediately after switching, resulting in additional data transmission delays. If the source cell is in a non-power-saving time period, and the data transmitted before and after the switch needs to maintain continuity, in order for the recipient to correctly parse the data, a large amount of data needs to be transmitted between the source cell and the target cell, which makes the switching process complicated.

[0072] Figure 4 is a schematic flow chart of a wireless communication method provided by an embodiment of the present application. The method shown in Figure 4 can be executed by a terminal device, and the method shown in Figure 4 includes step S410.

[0073] Step S410: The terminal device performs a first operation according to the first information.

[0074] The first information may include one or more of the following: NES information of the first cell, NES information of the second cell, and a first conditional switching threshold.

[0075] The first cell may be the cell where the terminal device is currently located. That is, the first cell may be the source cell in the conditional switching. If the terminal device has multiple serving cells, the first cell may be any one or more of the multiple cells. For example, if multi-carrier technology (such as carrier aggregation (CA)) is configured before switching, the first cell may be one or more of the cells corresponding to the multi-carrier. For example, the first cell may include: a primary cell (PCell), and / or one or more secondary cells (SCell).

[0076] The second cell may include one or more candidate target cells. For example, the second cell may be a cell that meets a conditional handover requirement. The conditional handover requirement may be related to wireless signal quality.

[0077] The NES information may include one or more of the following information of the corresponding cell: information of the power saving time period and information of the non-power saving time period.

[0078] During the power-saving period of the corresponding cell, the network equipment of the corresponding cell may adopt any method to achieve the power-saving effect. For example, the network equipment may meet one or more of the following: not receiving part or all of the uplink signals, not sending part or all of the downlink signals, reducing the transmit power, and reducing the number of multiple input multiple output (MIMO) layers sent. In some embodiments, the uplink signal and / or the downlink signal may be for data, that is, the uplink signal may be uplink data, and / or the downlink signal may be downlink data. In some embodiments, the uplink signal and / or the downlink signal may not include control information, reference signals, etc. For example, the uplink signal and / or the downlink signal may not include one or more of a random access preamble, a scheduling request (SR), a synchronization block (SSB), etc. Among them, SR is limited to requesting resources for emergency services and high-priority services.

[0079] It should be noted that, in some cases, even if the cell is configured with the NES measure of "not sending downlink data and / or not receiving uplink data", data can still be sent and received between the network device and the terminal device. For example, at the end of the non-power saving time period, there is still data to be sent between the terminal device and the network. Due to some reasons, such as the small amount of data or high priority of these data, these data cannot wait until the next non-power saving time period for transmission. Therefore, the data still needs to be transmitted during the power saving time period. The cell can configure whether to continue sending and receiving data during the power saving time period. For example, for the first cell, it can be configured that "if the current data transmission cannot be completed, the first cell will continue to transmit data with the terminal device after the end of the non-power saving time period of the first cell" or "if the current data transmission cannot be completed, the first cell will stop transmitting data with the terminal device after the end of the non-power saving time period of the first cell"

[0080] Corresponding to the power-saving time period, during the non-power-saving time period of the corresponding cell, the network equipment of the corresponding cell can meet one or more of the following: receiving part or all of the uplink signals that are not received during the power-saving time period, sending part or all of the downlink signals that are not sent during the power-saving time period, restoring the transmission power, and restoring the number of MIMO layers to be sent.

[0081] The information about the power saving period may include one or more of the following information about the power saving period: a start time, an end time, a duration, a period, an offset value, etc. The start time and / or the end time may be considered as a time switching time between a non-power saving period and a power saving period, or the start time and / or the end time may be considered as a state switching time between a non-power saving state and a power saving state.

[0082] The information of the non-power saving period may include one or more of the following information of the non-power saving period: start time, end time, duration, period, offset value, etc. The start time and / or end time may be considered as the time of switching between the non-power saving period and the power saving period, or the start time and / or end time may be considered as the time of switching between the non-power saving state and the power saving state.

[0083] It should be noted that, for the first cell, the terminal device may determine the power-saving time period and / or non-power-saving time period of the first cell based on the system frame number (SFN) of the first cell. For the second cell, the terminal device may determine the power-saving time period and / or non-power-saving time period of the second cell based on the SFN of the first cell, or may determine the power-saving time period and / or non-power-saving time period of the second cell based on the SFN of the second cell.

[0084] It is understood that the start time of the power-saving period and the end time of the non-power-saving period may represent the same time. That is, the start time of the power-saving period may represent the end time of the non-power-saving period, or the end time of the non-power-saving period may represent the start time of the power-saving period. Similarly, the start time of the non-power-saving period and the end time of the power-saving period may represent the same time. That is, the start time of the non-power-saving period may represent the end time of the power-saving period, or the end time of the power-saving period may represent the start time of the non-power-saving period.

[0085] It should be noted that if there are multiple separately configured power-saving time periods, the above-mentioned start time can be determined based on any start time (e.g., earliest or latest) among the multiple power-saving time periods, or the end time can be determined based on any end time (e.g., earliest or latest) among the multiple power-saving time periods. For example, if the first cell is configured with the NES measures of "not receiving uplink data" and "not sending downlink data", the end time can be the end time of "not receiving uplink data" or the end time of "not sending downlink data".

[0086] It should be noted that if the first cell includes multiple cells, the start time of the power-saving time period of the first cell can be determined according to any start time (for example, the earliest or latest) of the multiple power-saving time periods of the multiple cells, or the end time of the power-saving time period of the first cell can be determined according to any end time (for example, the earliest or latest) of the multiple power-saving time periods of the multiple cells. For example, if the terminal device is configured with CA before switching, the start time of the power-saving time period of the first cell may be the latest moment among the start times of the power-saving time periods of the multiple secondary cells. That is, the start time of the power-saving time period of the first cell may be the moment when multiple secondary cells all enter the power-saving state. Alternatively, if the terminal device is configured with CA before switching, the end time of the power-saving time period of the first cell may be the latest moment among the end times of the power-saving time periods of the multiple secondary cells. That is, the end time of the power-saving time period of the first cell may be the moment when multiple secondary cells all enter the non-power-saving state.

[0087] It should be noted that, in the case that the second cell includes multiple candidate target cells, the NES information of the second cell may include part or all of the NES information of each candidate target cell.

[0088] The first conditional handover threshold may be related to the conditional handover requirement. For example, if the conditional handover requirement is related to wireless signal quality, the second cell meets the conditional handover requirement when the wireless signal quality of the second cell is higher than or equal to the first conditional handover threshold and / or the wireless signal quality of the first cell is lower than the first conditional handover threshold.

[0089] It should be noted that the first conditional handover threshold may include one or more thresholds. If the first conditional handover threshold includes multiple thresholds, the terminal device may select at least one threshold from the multiple thresholds for use. For example, the terminal device may select one of the multiple thresholds as a basis for determining whether the candidate target cell meets the conditional handover requirements.

[0090] The first conditional switching threshold may be related to the NES state of the first cell and / or the NES state of the second cell. The first conditional switching threshold may include one or more of the following thresholds: a second conditional switching threshold when the first cell is in a power saving state, a third conditional switching threshold when the first cell is in a non-power saving state, a fourth conditional switching threshold when the second cell is in a power saving state, and a fifth conditional switching threshold when the second cell is in a non-power saving state.

[0091] In some embodiments, the first conditional switching threshold may include one or more of the following information: a numerical value of the first conditional switching threshold, a first difference between the first conditional switching threshold and a reference threshold. That is, the numerical value of the first conditional switching threshold may be directly indicated, and / or the first conditional switching threshold may be indirectly indicated via the first difference. After obtaining the first difference, the terminal device may determine the first conditional switching threshold based on the first difference and the reference threshold. For example, the numerical value of the first conditional threshold may be equal to the sum or difference of the reference threshold and the first difference.

[0092] Optionally, the reference threshold may satisfy one or more of the following: configured by the network device, pre-configured, or specified by a protocol.

[0093] Optionally, the first difference may satisfy one or more of the following: configured by the network device, pre-configured, or specified by a protocol.

[0094] It should be noted that, when the first conditional switching threshold includes multiple thresholds, the multiple thresholds can be configured separately or simultaneously.

[0095] The first operation may be an operation related to conditional handover. For example, the first operation may include one or more of the following: determining a cell that meets the conditional handover requirements, determining a first time point for handover from the first cell to the second cell, and measuring a third cell within a first time period between the second time point and the first time point to determine whether the third cell meets the conditional handover requirements. The second time point is the time point when the terminal device determines that the second cell meets the conditional handover requirements.

[0096] From this, it can be seen that based on the first information, the terminal device can take the first information into consideration when performing operations related to conditional switching, thereby optimizing the conditional switching process to take into account the energy-saving requirements of the network device and the switching requirements of the terminal device.

[0097] The first operation is described in detail below through an embodiment.

[0098] In some embodiments, the first operation may include determining a cell that meets the conditional handover requirement.

[0099] In some implementations, the terminal device may determine a cell that meets the conditional switching requirements based on a first conditional switching threshold.

[0100] For example, the first conditional switching threshold may include a first absolute threshold and a second absolute threshold. If the following conditions are met, the second cell is a cell that meets the conditional switching: the radio signal quality of the first cell is lower than the first absolute threshold 1, and the radio signal quality of the second cell is higher than the second absolute threshold.

[0101] For another example, the first conditional switching threshold may include a relative threshold. If the following condition is met, the second cell is a cell that meets the conditional switching: the difference in radio signal quality between the second cell and the first cell is higher than the relative threshold.

[0102] For another example, the first conditional switching threshold may include a second conditional switching threshold when the first cell is in a power-saving state. That is, when the first cell is in a power-saving state, it can be determined whether the second cell meets the conditional switching requirement based on the first conditional switching threshold. Exemplarily, when the first cell is in a power-saving time period, the conditional switching requirement may be "the wireless signal quality of the first cell is lower than the second conditional switching threshold, and the wireless signal quality of the second cell is higher than the second absolute threshold". Alternatively, when the first cell is in a power-saving time period, the conditional switching requirement may be "the difference in wireless signal quality between the second cell and the first cell is higher than the second conditional switching threshold".

[0103] For another example, the first conditional switching threshold may include a third conditional switching threshold when the first cell is in a non-power saving state. That is, when the first cell is in a non-power saving state, it can be determined whether the second cell meets the conditional switching requirement based on the second conditional switching threshold. Exemplarily, when the first cell is in a non-power saving time period, the conditional switching requirement may be "the wireless signal quality of the first cell is lower than the third conditional switching threshold, and the wireless signal quality of the second cell is higher than the second absolute threshold". Alternatively, when the first cell is in a non-power saving time period, the conditional switching requirement may be "the difference in wireless signal quality between the second cell and the first cell is higher than the third conditional switching threshold".

[0104] For another example, the first conditional switching threshold may include a fourth conditional switching threshold when the second cell is in a power-saving state. That is, when the second cell is in a power-saving state, whether the second cell meets the conditional switching requirement can be determined based on the fourth conditional switching threshold. Exemplarily, when the second cell is in a power-saving time period, the conditional switching requirement may be "the wireless signal quality of the first cell is lower than the first absolute threshold, and the wireless signal quality of the second cell is higher than the fourth conditional switching threshold." Alternatively, when the second cell is in a power-saving time period, the conditional switching requirement may be "the difference in wireless signal quality between the second cell and the first cell is higher than the fourth conditional switching threshold."

[0105] For another example, the first conditional switching threshold may include the fifth conditional switching threshold when the second cell is in a non-power saving state. That is, when the second cell is in a non-power saving state, it can be determined whether the second cell meets the conditional switching requirement based on the fifth conditional switching threshold. Exemplarily, when the second cell is in a non-power saving time period, the conditional switching requirement may be "the wireless signal quality of the first cell is lower than the first absolute threshold, and the wireless signal quality of the second cell is higher than the fifth conditional switching threshold". Alternatively, when the second cell is in a non-power saving time period, the conditional switching requirement may be "the difference in wireless signal quality between the second cell and the first cell is higher than the fifth conditional switching threshold".

[0106] In some embodiments, the first operation may include determining or predicting a first moment of handover from the first cell to the second cell. Alternatively, the first moment may also be referred to as a handover timing. Alternatively, the first moment may be the moment when the terminal device initiates random access (RA) to the second cell. Alternatively, the first moment may be the moment when the terminal device begins handover to the second cell.

[0107] Based on the above-mentioned first operation, the terminal device may not switch to the second cell immediately when it is determined that the second cell meets the requirements of the conditional switching, but may wait until the first moment to perform the switching. Therefore, the terminal device can determine the appropriate conditional switching time to optimize the communication effect. For example, if the second cell is currently in a power-saving time period, the second cell may take the NES measure of "not sending downlink data and / or not receiving uplink data". If the terminal device switches to the second cell immediately, the data cannot be transmitted immediately in the second cell, resulting in additional data transmission delay. This delay may cause the data transmission to fail to meet the quality of service (QoS) requirements of the corresponding radio bearer (RB). Based on the present application, the terminal device may not switch to the second cell immediately, and determine a suitable switching time to meet the QoS requirements corresponding to the data transmission. Alternatively, if the first cell is currently in a non-power-saving time period, and the first cell takes the NES measure of "not sending downlink data and / or not receiving uplink data", then in the non-power-saving time period, the first cell will centrally perform data transmission with the terminal device. If the terminal device switches during a time period of concentrated data transmission, the following situation may exist: the data transmitted before and after the switch needs to maintain continuity, that is, the data transmitted before the switch needs to be combined with the data transmitted after the switch to be correctly parsed. In this case, in order to correctly parse the data, these data need to be transmitted between the first cell and the second cell. Taking into account the NES measures, the centralized transmission of data may result in a large amount of data that needs to be transmitted between the first cell and the second cell, resulting in a complex switching process. Based on the present application, the terminal device may not switch to the second cell immediately, and determine a suitable switching time, thereby avoiding data transmission between cells and simplifying the switching process.

[0108] It should be understood that the above-mentioned technical solution of setting corresponding conditional handover thresholds for different NES states can also achieve similar technical effects. For example, the second conditional handover threshold when the first cell is in a power-saving state can be lower than the third conditional handover threshold when the first cell is in a non-power-saving state. That is, when the first cell is in a power-saving state, a terminal device is more likely to handover to another cell; while when the first cell is in a non-power-saving state, a terminal device is less likely to handover to another cell. Therefore, the present application can reduce the probability of a terminal device performing a conditional handover when the first cell is in a non-power-saving state, thereby, to a certain extent, avoiding the problem of large amounts of data being transmitted between the first and second cells due to handovers in the first cell's non-power-saving state. Alternatively, the fourth conditional handover threshold when the second cell is in a power-saving state can be higher than the fifth conditional handover threshold when the second cell is in a non-power-saving state. That is, when the second cell is in a non-power-saving state, a terminal device is more likely to handover to the second cell; while when the second cell is in a power-saving state, a terminal device is less likely to handover to the second cell. Therefore, the present application can reduce the probability of a terminal device handing over to the second cell when the second cell is in a power-saving state, thereby, to a certain extent, avoiding problems such as data transmission delays caused by handovers to the second cell in the second cell's power-saving state.

[0109] In some embodiments, the first moment can be determined based on one or more of the following information: the first information, the second moment, and whether the terminal device has data to send and / or receive at the second moment.

[0110] As described above, the second moment is the moment when the terminal device determines that the second cell meets the conditional switching requirement. Alternatively, the second moment is the moment when the second cell meets the conditional switching requirement.

[0111] As a possible implementation, the first information may be used to indicate a power saving period of the first cell. If the second time is within the power saving period of the first cell, the first time may be determined based on the second time. In other words, if the time at which the second cell is determined to meet the conditional handover requirements is within the power saving period of the source cell, the time of handover to the second cell may be determined based on the time at which the second cell is determined to meet the conditional handover requirements.

[0112] Exemplarily, the first time may be equal to the second time. In other words, if it is determined that the time when the second cell meets the conditional switching requirement is within the power saving time period of the source cell, the terminal device may immediately switch to the second cell.

[0113] Figure 5 shows an example NES configuration for the first cell. As shown in Figure 5, at time T1, the second cell meets the conditional handover requirements. That is, T1 is the second time. Since T1 is within the power saving period of the first cell, the terminal device can begin the conditional handover process for the second cell at T1.

[0114] For the source cell, if the second moment is within a power-saving period, a large amount of data may not be transmitted between the terminal device and the source cell. Even if the terminal device is immediately handed over to the second cell, no data transmission between the first cell and the second cell is required. Therefore, in this case, the terminal device can immediately perform the handover so that the second cell can serve the terminal device as soon as possible.

[0115] As a possible implementation, the first information may be used to indicate a non-power saving period of the first cell. If the second time is within the non-power saving period of the first cell, the first time may be determined based on the end time of the non-power saving period of the first cell. In other words, if the time at which the second cell meets the conditional handover requirements is within the non-power saving period of the source cell, the time for initiating random access to the second cell may be determined based on the end time of the non-power saving period of the source cell.

[0116] For example, the first moment may be equal to or later than the end moment of the non-power saving period of the first cell. In other words, if it is determined that the moment when the second cell meets the conditional switching requirement is within the non-power saving period of the source cell, the terminal device may wait until the non-power saving period of the first cell ends before switching to the second cell.

[0117] If a terminal device switches to a second cell during a non-power-saving period in the first cell, the aforementioned problem of requiring data transmission between the first cell and the second cell may occur. Based on the present application, the terminal device can wait until the non-power-saving period in the first cell ends before switching to the second cell, thereby minimizing the occurrence of the aforementioned problem.

[0118] Figure 6 shows an example NES configuration for the first cell. As shown in Figure 6, the second cell meets the conditional handover requirements at time T1. Time T1 is within the first cell's non-power-saving period. The non-power-saving period ends at time T2. The terminal device can initiate random access to the second cell starting at time T2.

[0119] It should be noted that if CA is configured for the terminal device before switching and NES is configured in both the primary cell and the secondary cell, the terminal device can determine the first moment based on the NES information of the primary cell, or it can determine the first moment based on the NES information of the secondary cell. For example, the terminal device can use the end time of the non-power saving period of the primary cell as the second moment. Alternatively, the terminal device can use the end time of the non-power saving period of the secondary cell as the second moment.

[0120] In some embodiments, the terminal device may determine the first moment based on whether there is data to be sent and / or received at the second moment.

[0121] Optionally, if the terminal device has no data to send and / or receive at the second moment, the first moment can be determined based on the second moment. If there is no data to send and / or receive at the second moment, the terminal device can determine the first moment based on the second moment without considering whether the first cell is in a non-power-saving time period. Exemplarily, if the terminal device has no data to send and / or receive at the second moment, even if the second moment is in a non-power-saving time period of the first cell, the terminal device can determine the first moment based on the second moment, for example, by immediately switching to the second cell.

[0122] Taking the scenario shown in Figure 5 as an example, if the second cell meets the conditional switching requirements at time T1 and the terminal device has no data to send and / or receive, the terminal device can initiate random access to the second cell starting at time T1.

[0123] It is understandable that if the terminal device has no data to transmit, there will be no problem of transmitting data from the first cell to the second cell after the handover. Therefore, based on the present application, the terminal device can perform the handover as early as possible, thereby switching to a more suitable cell as soon as possible.

[0124] Optionally, if the terminal device has data to send and / or receive at the second moment, the terminal device may postpone the moment of switching to the second cell. Optionally, the first moment may be determined based on the end moment of data transmission and / or reception. For example, the first moment may be equal to or later than the end moment of data transmission and / or reception. In other words, the terminal device may wait until data transmission and / or reception is completed before initiating random access to the second cell. For example, the terminal device may wait until data transmission and / or reception is completed and then immediately initiate random access to the second cell.

[0125] In some embodiments, the situation in which the terminal device has data to send and / or receive at the second moment and the second moment is within the non-power-saving time period of the first cell can be divided into two situations: situation one and situation two.

[0126] In case 1, the end time of data transmission and / or reception is earlier than or equal to the end time of the non-power saving period of the first cell. In case 1, the first time may be equal to or later than the end time of data transmission and / or reception.

[0127] Case 2: The end time of data transmission and / or reception is later than the end time of the non-power saving time period of the first cell. Case 2 can also be further divided into Case 2.1 and Case 2.2. Case 2.1: The terminal device determines that "if the current data transmission cannot be completed, the first cell will continue to transmit data with the terminal device after the end time of the non-power saving time period of the first cell". In Case 2.1, the first moment may be later than or equal to the end time of data transmission and / or reception. Case 2.2: The terminal device determines that "if the current data transmission cannot be completed, the first cell will stop transmitting data with the terminal device after the end time of the non-power saving time period of the first cell". In Case 2.2, the first moment may be equal to the end time of the non-power saving time period of the first cell.

[0128] It should be noted that the terminal device can determine whether situation 2 belongs to situation 2.1 or situation 2.1 based on the protocol provisions and one or more items of the configuration information of the first cell.

[0129] As described above, the first time can be determined based on the NES of the first cell. The following example illustrates that the first time can be determined based on the NES information of the second cell.

[0130] In some embodiments, if the second time is within the non-power saving period of the second cell, the first time can be determined based on the second time. For example, the first time can be equal to the second time. In other words, if it is determined that the second cell meets the conditional handover requirements during the non-power saving period of the second cell, the terminal device can immediately handover to the second cell.

[0131] As shown in Figure 7, at time T1, the second cell meets the conditional switching requirement, and T1 is within the non-power saving time period of the second cell. Therefore, the terminal device can be switched to the second cell at T1.

[0132] In some embodiments, if the second time is within the power saving period of the second cell, the first time can be determined based on the second time and the start time of the non-power saving period of the second cell. It is understood that if it is determined that the second cell meets the conditional handover requirements within the power saving period of the second cell, the terminal device may not immediately handover to the second cell. For example, the terminal device may wait for a period of time before handing over to the second cell.

[0133] Optionally, the first moment may be earlier than the start moment of the non-power saving period of the second cell. For example, the first moment may be a moment randomly selected between the second moment and the start moment of the non-power saving period of the second cell.

[0134] It is understandable that only after the terminal device successfully switches to the second cell can data be transmitted between the terminal device and the network device. The switching process takes some time. In other words, it takes some time from the time the terminal device starts switching to the second cell to the time the terminal device can send and receive data in the second cell. The first moment is earlier than the start time of the non-power-saving time period of the second cell, which allows the terminal device to perform the switching process before the start of the non-power-saving time period of the second cell, thereby sending and receiving data on the second cell as early as possible.

[0135] Illustratively, the first moment may be within a first duration between the start time of the non-power saving period of the second cell. Alternatively, the time difference between the first moment and the start time of the non-power saving period of the second cell is less than or equal to the first duration. The first duration may satisfy one or more of the following: configured by a network device, pre-configured, or specified by a protocol.

[0136] In the case where the first duration is configured by the network device, the network device may be a network device corresponding to the first cell, or a network device corresponding to the second cell. In addition, the network device may configure the first duration for the terminal device through an RRC message such as a conditional handover command, or the network device corresponding to the first cell may configure the first duration for the terminal device through a message such as a MAC CE or a DCI.

[0137] Optionally, the first duration may be the duration required for the terminal device to complete random access (also referred to as an RA threshold). That is, the terminal device may start performing random access in advance before the start moment of the non-power saving time period of the second cell based on the duration required to complete random access, so as to start data transmission and reception as early as possible within the non-power saving time period of the second cell. For example, the time difference between the first moment and the start moment of the non-power saving time period of the second cell may be equal to the first duration. Then, after the terminal device completes random access in the second cell, it may immediately enter the non-power saving time period of the second cell, thereby immediately performing data transmission and reception.

[0138] As shown in Figure 8, the second cell meets the conditional handover requirements at time T1. T1 is within the power saving period of the second cell. The terminal device performs a handover to the second cell at time T2. T2 is the time corresponding to the first duration from the start of the non-power saving period of the second cell. The first duration is the RA threshold, which is the length of time required to complete random access.

[0139] In some embodiments, the terminal device may perform the first operation at a first change moment or a second change moment. The first change moment is the moment when the NES state of the first cell changes; the second change moment is the moment when the NES state of the second cell changes. The moment when the NES state changes may include: the moment when the power-saving state changes to the non-power-saving state, or the moment when the non-power-saving state changes to the power-saving state. In other words, the terminal device may wait for the NES of either the first cell or the second cell to change before determining the time to switch to the second cell. For example, the terminal device may switch to the second cell at the first change moment or the second change moment.

[0140] It should be noted that in the scenario described above, the terminal device can choose to switch to the second cell immediately, or can choose to switch to the second cell at other times according to the embodiment described above. The specific behavior of the terminal device may be specified by the protocol, configured by the network device, or determined according to the implementation of the terminal device. If the specific behavior of the terminal device is configured by the network device, the network device may be the network device corresponding to the first cell or the second cell. In other words, the behavior of the terminal device can be determined by the first cell or the second cell. If the behavior of the terminal device is determined by the second cell, the corresponding configuration information can be forwarded to the terminal device through the network device corresponding to the first cell. In addition, if the specific behavior of the terminal device is configured by the network device, the corresponding configuration information can be carried by one or more of the following messages: RRC message, MAC CE, DCI.

[0141] The above-described embodiments can be implemented individually or in combination. That is, the first information may include only the NES information of the first cell or the NES information of the second cell. Alternatively, the first information may include both the NES information of the first cell and the NES information of the second cell. That is, the terminal device may perform the first operation based only on the NES information of the first cell or the NES information of the second cell. Alternatively, the terminal device may perform the first operation based on both the NES information of the first cell and the NES information of the second cell.

[0142] For example, when performing a first operation based on both the NES information of the first cell and the NES information of the second cell, the terminal device may perform the first operation at the first change moment or the second change moment. This is described in detail below with reference to Table 1. At the second moment, the NES states of the first cell and the second cell may include one of the combinations shown in Table 1.

[0143] Table 1

[0144] For combination 1, the first cell is in a power-saving state, and the second cell is in a non-power-saving state. For example, the first cell cannot transmit data or can only transmit data in a restricted state (such as limiting the number of MIMO layers), while the second cell can transmit data normally. In the case of combination 1, the terminal device can immediately switch to the second cell. That is, the first moment can be equal to the second moment.

[0145] For combination 2, the terminal device can choose to switch to the second cell immediately. Alternatively, the terminal device can choose to wait for the NES status of any cell to change before determining whether to switch to the second cell. Alternatively, the terminal device can wait for a random period of time before determining whether to switch to the second cell immediately, thereby preventing multiple terminal devices from executing conditional handovers simultaneously.

[0146] For combination 3, the terminal device can choose to switch to the second cell immediately. Alternatively, the terminal device can choose to wait for the NES status of any cell to change before determining whether to switch to the second cell. Alternatively, the terminal device can wait for a random period of time before determining whether to switch to the second cell immediately, thereby preventing multiple terminal devices from executing conditional handovers simultaneously.

[0147] For combination 4, the terminal device may choose to transmit data in the first cell, wait until the first cell enters a power saving state, or wait until the data transmission of the terminal device is completed, and then switch to the second cell.

[0148] In some embodiments, the first operation may include: during a first time period between the second moment and the first moment, the terminal device may measure a third cell to determine whether the third cell meets the conditional handover requirement. In other words, during the first time period, the terminal device may also determine whether cells other than the second cell meet the conditional handover requirement, thereby selecting a more appropriate target cell for handover.

[0149] In some embodiments, the terminal device may not measure the third cell during the first time period. That is, during the first time period, the terminal device may not determine whether cells other than the second cell meet the conditional handover requirements and may switch to the second cell at the first moment. It is understood that after the terminal device has selected a target cell, the terminal device may no longer perform measurements, thereby saving energy consumption of the terminal device.

[0150] Optionally, whether the terminal device measures the third cell within the first time period can be indicated by a first indication information. The first indication information may meet one or more of the following: specified by the protocol, configured by the network device, and pre-configured. If the first indication information is configured by the network device, the terminal device can receive the first indication information sent by the network device. The network device can be a network device corresponding to the first cell, or a network device corresponding to the second cell. If the first configuration information is determined by the second cell, the first configuration information can be forwarded to the terminal device through the network device corresponding to the first cell. In addition, if the first configuration information is configured by the network device, the first configuration information can be carried by one or more of the following messages: RRC message, MAC CE, DCI. If the first configuration information is carried in an RRC message, the RRC message can be a conditional switching command.

[0151] In some embodiments, the same first configuration information may be configured for all candidate target cells. For example, as long as any candidate target cell meets the conditional handover requirements, the terminal device no longer measures other candidate target cells. Alternatively, regardless of which candidate target cell meets the conditional handover requirements, the terminal device needs to measure the other candidate target cells.

[0152] In some embodiments, different first configuration information can be configured for different candidate target cells. For example, if the candidate first target cell meets the conditional handover requirements, the determination of whether other candidate target cells meet the conditional handover requirements will continue; if the candidate second target cell meets the conditional handover requirements, the determination of whether other candidate target cells meet the conditional handover requirements will no longer be made. The candidate first target cell or the second target cell can both be the second cell described above.

[0153] In some embodiments, the third cell may meet the conditional handover requirements. In this case, the terminal device can determine that the second or third cell is the access cell or target cell based on one or more of the following information: the first time, the second time, the third time, and the fourth time. In other words, the terminal device can select the actual cell to handover to based on one or more of the above information. The third time is the handover time from the first cell to the third cell. The fourth time is the time when the terminal determines that the third cell meets the conditional handover requirements.

[0154] For example, if the first time is earlier than or equal to the third time, the terminal device may choose to switch to the second cell; and / or if the first time is later than or equal to the third time, the terminal device may choose to switch to the third cell. In other words, the terminal device may select the cell whose access time or switching time is closest to the current time as the cell to be accessed.

[0155] For another example, if the second moment is earlier than or equal to the fourth moment, the terminal device may choose to switch to the second cell; and / or if the second moment is later than or equal to the fourth moment, the terminal device may choose to switch to the third cell. In other words, the terminal device may select the cell that most recently meets the conditional switching requirements as the cell to access.

[0156] It should be noted that the first moment and the third moment are both predicted moments, that is, the first moment is the switching moment predicted by the terminal device to switch from the first cell to the second cell, and the third moment is the switching moment predicted by the terminal device to switch from the first cell to the third cell. Whether the switching is actually performed at the first moment or the third moment is determined based on which cell the terminal device chooses to switch to. For example, if the terminal device chooses to switch to the second cell, the terminal device will switch to the second cell at the first moment and will not switch to the third cell at the third moment. Similarly, if the terminal device chooses to switch to the third cell, the terminal device will switch to the third cell at the third moment and will not switch to the second cell at the second moment.

[0157] The following uses the scenario shown in FIG9 as an example for explanation.

[0158] As shown in Figure 9, the terminal device determines at time T1 that cell A (i.e., the second cell) meets the conditional switching requirements, and the terminal device determines to access cell A at time T1'. Subsequently, the terminal device measures other alternative target cells or the terminal device only measures other alternative target cells with a higher priority than cell A, and determines at time T2 that cell B (i.e., the third cell) meets the conditional switching conditions. The terminal device also determines to access cell B at time T2'. The terminal device can choose to access cell A at time T1' (selecting the cell with the most recent access time as the target cell), or choose to access cell B at time T2' (selecting the cell that meets the conditions most recently as the cell to be accessed).

[0159] It should be noted that the terminal device may also determine whether to access the second or third cell based on other configuration information. This other configuration information may, for example, include priority information related to conditional handover. For example, the terminal device may compare the priorities of the second and third cells and select the cell with the higher priority for access. This other configuration information may, for example, be configured by a network device.

[0160] The present application also provides a communication method shown in FIG10. The method shown in FIG10 can be performed by a network device. The network device can be a network device corresponding to the first cell or a network device corresponding to the second cell. The method shown in FIG10 can include step S1010.

[0161] Step S1010: The network device sends instruction information.

[0162] Optionally, the network device may be a first network device, and the first network device may be a network device corresponding to the first cell. In other words, the first network device may be a network device corresponding to the source cell (source network device). In this case, the first network device may send the indication information to the terminal device.

[0163] Alternatively, the network device may be a second network device, and the second network device may be a network device corresponding to the second cell. In other words, the second network device may be a network device corresponding to the target cell (target network device). In this case, the second network device may send the indication information to the first network device, which in turn sends the indication information to the terminal device. Alternatively, the second network device may directly send the indication information to the terminal device.

[0164] The indication information may include second indication information, wherein the second indication information may be used to indicate the first information.

[0165] The indication information may also include any information configured by the network device as described above. For example, the indication information may include the first indication information as described above.

[0166] The NES information of the second cell may be indicated by third indication information. The first network device may receive the third indication information. The second network device may send the third indication information.

[0167] In some embodiments, the second network device may proactively send the third indication information. Alternatively, the first network device may send a request message to request the second network device to send the third indication information.

[0168] For example, the second network device may provide the third indication information to the first network device when the inter-cell interface is established. After the inter-cell interface is established, if the NES information of the second cell is updated, the second network device may immediately notify the first network device of the third indication information. It should be noted that in this embodiment, the process of exchanging the third indication information between the two network devices may not be performed through the handover preparation process of the terminal device.

[0169] For another example, the second network device may send the third indication information to the first network device during the handover preparation process of the network device.

[0170] For another example, the second network device may send the third indication information to the first network device in the handover preparation process in response to the request message of the first network device.

[0171] The second network device may decide whether to send the third indication information. That is, providing the third indication information to the first cell is optional. For example, when the first network device sends the request message, the second network device may not send the third indication information.

[0172] In some embodiments, if the second network device does not send the third indication information, it may indicate that the second cell does not adopt the NES measure. Alternatively, if the second network device does not send the third indication information, it may indicate that although the second cell adopts the NES measure, it does not want the NES information of the second cell to affect the first operation.

[0173] In some embodiments, if the second network device sends the third indication information, it may indicate that the second cell has taken NES measures.

[0174] As described above, the NES information may include information about power-saving time periods and / or information about non-power-saving time periods. The time periods may be represented by one or more of a period, an offset, a duration, and the like. Based on the received indication information, the terminal device may infer "time period information based on the SFN of the second cell as a reference."

[0175] The first network device may send the received third indication information to the terminal device via indication information.

[0176] In some embodiments, the first network device may send unprocessed third indication information to the terminal device. That is, the indication information may include the unprocessed third indication information. In other words, the first network device may transparently transmit the received third indication information to the terminal device. It will be appreciated that transparent transmission can simplify the implementation of the first network device and reduce the computational workload of the first network device.

[0177] In some embodiments, the first network device may process (e.g., parse) the received third indication information, and send the processed third indication information (i.e., the NES information of the second cell obtained by parsing) to the terminal device via the indication information. If the first network device parses the third indication information, it may send all the NES information to the terminal device, or it may send only a portion of the NES information to the terminal device. For example, after the first network device parses the third indication information, it may extract and send a portion of the NES information related to CHO to the terminal device, and may not send other NES information. A portion of the NES information related to CHO may, for example, include one or more of the following information: "a time period during which the second cell does not send downlink data," "a time period during which the second cell does not receive uplink data," "the second cell reduces the transmission power during certain time periods," "the second cell adjusts the phase of transmitted data during certain time periods," and the like.

[0178] It can be seen from this that the first network device processes the third indication information before sending it, which can reduce the data volume of the indication information sent by the first network device to the terminal device, thereby saving communication resources.

[0179] In some embodiments, if the NES information of the first cell and / or the NES information of the second cell changes, the first network device may send indication information to the terminal device. If the NES information of the first cell and / or the NES information of the second cell does not change, the first network device may not send indication information to the terminal device.

[0180] For example, when the NES information of the second cell changes, the first network device may send indication information to the terminal device to indicate the updated NES information of the second cell.

[0181] Exemplarily, if the first network device transparently transmits the third indication information to the terminal device, the first network device may notify the terminal device of the updated NES information of the second cell through a conditional switching message. If the first network device parses the third indication information and then transmits it to the terminal device, the first network device may notify the terminal device of the updated NES information of the second cell through a conditional switching message, or the first network device may also notify the terminal device of the updated NES information of the second cell through other RRC messages. For example, the updated NES configuration of the second cell may be notified through layer 1 (layer 1, L1) and layer 2 (layer 2, L2) indication messages. The L1 and L2 indication messages may, for example, include: MAC CE and / or DCI, etc. In other words, the indication information may be carried in one or more of the RRC message, MAC CE and DCI. The RRC message may be a conditional switching message.

[0182] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, so for parts not described in detail, reference can be made to the above method embodiments.

[0183] 11 is a schematic structural diagram of a terminal device 1100 provided in an embodiment of the present application. The terminal device 1100 includes an execution unit 1110 .

[0184] The execution unit 1110 is used to perform a first operation based on the first information; wherein the first information includes one or more of the following information: network energy saving NES information of the first cell where the terminal device is located, NES information of the second cell, and a first conditional switching threshold related to the NES status of the first cell and / or the NES status of the second cell; the first operation includes one or more of the following: determining a cell that meets the conditional switching requirements; determining a first moment of switching from the first cell to the second cell; and measuring a third cell within a first time period between the second moment and the first moment to determine whether the third cell meets the conditional switching requirements, the second moment being the moment when the terminal device determines that the second cell meets the conditional switching requirements.

[0185] In some embodiments, the first conditional switching threshold includes one or more of the following information: a value of the first conditional switching threshold; and a first difference between the first conditional switching threshold and a reference threshold.

[0186] In some embodiments, the reference threshold satisfies one or more of the following: configured by the network device, pre-configured, or specified by a protocol.

[0187] In some embodiments, the first conditional switching threshold satisfies one or more of the following: configured by the network device, pre-configured, or specified by a protocol.

[0188] In some embodiments, the first conditional switching threshold includes one or more of the following thresholds: a second conditional switching threshold when the first cell is in a power saving state; a third conditional switching threshold when the first cell is in a non-power saving state; a fourth conditional switching threshold when the second cell is in a power saving state; and a fifth conditional switching threshold when the second cell is in a non-power saving state.

[0189] In some embodiments, the first moment is determined based on one or more of the following information: the first information; the second moment; whether the terminal device has data to send and / or receive at the second moment.

[0190] In some embodiments, the first information is used to indicate a power saving period of the first cell. If the second time is within the power saving period of the first cell, the first time is determined according to the second time.

[0191] In some embodiments, the first information is used to indicate a non-power saving period of the first cell. If the second time is within the non-power saving period of the first cell, the first time is determined according to the end time of the non-power saving period of the first cell.

[0192] In some embodiments, if the terminal device has data to send and / or receive at the second moment, the first moment is determined according to the end moment of the data sending and / or receiving.

[0193] In some embodiments, if the terminal device has no data to send and / or receive at the second moment, the first moment is determined based on the second moment.

[0194] In some embodiments, the first information is used to indicate a non-power saving time period of the second cell. If the second time is within the non-power saving time period of the second cell, the first time is determined according to the second time.

[0195] In some embodiments, the first information is used to indicate the power saving period of the second cell. If the second time is within the power saving period of the second cell, the first time is determined according to the second time and the start time of the non-power saving period of the second cell.

[0196] In some embodiments, the first time is within a first time period before a start time of a non-power saving period of the second cell.

[0197] In some embodiments, the first duration is the duration required for the terminal device to complete random access.

[0198] In some embodiments, the time difference is equal to the first duration.

[0199] In some embodiments, the first duration satisfies one or more of the following: configured by the network device, or specified by a protocol.

[0200] In some embodiments, the moment when the NES state of the first cell changes is the first change moment, and the moment when the NES state of the second cell changes is the second change moment; the terminal device performs the first operation according to the first information, including: at the first change moment or the second change moment, the terminal device performs the first operation according to the first information.

[0201] In some embodiments, the terminal identification 1100 is further used to: receive first indication information; wherein the first indication information is used to indicate whether the terminal device needs to measure the third cell within the first time period.

[0202] In some embodiments, when the third cell meets the conditional switching requirements, the second cell or the third cell is determined as the access cell based on one or more of the following information: the first moment; the second moment; the third moment, the third moment is the switching moment from the first cell to the third cell; the fourth moment, the fourth moment is the moment when the terminal device determines that the third cell meets the conditional switching requirements.

[0203] In some embodiments, the terminal device 1100 is further used to: receive second indication information sent by the network device; wherein the second indication information is used to indicate the first information.

[0204] In an optional embodiment, the execution unit 1110 may be a processor 1310. The network device 1200 may further include a memory 1320 and a transceiver 1330, as specifically shown in FIG13 .

[0205] FIG12 is a schematic structural diagram of a network device 1200 provided in an embodiment of the present application. The network device 1200 may include a sending unit 1210 .

[0206] The sending unit 1210 is used to send indication information; wherein the indication information includes second indication information, the second indication information is used to indicate the first information, and the first information includes one or more of the following information: NES information of the first cell where the terminal device is located, NES information of the second cell, and a first conditional switching threshold related to the NES status of the first cell and / or the NES status of the second cell.

[0207] In some embodiments, when the network device is a network device corresponding to the first cell, the network device 1200 is also used for: the network device corresponding to the first cell receives the third indication information sent by the network device corresponding to the second cell; wherein the third indication information is used to indicate the NES information of the second cell.

[0208] In some embodiments, the network device 1200 is further configured to: the network device corresponding to the first cell sends a request message to request sending third indication information.

[0209] In some embodiments, the indication information includes unprocessed third indication information or processed third indication information.

[0210] In an optional embodiment, the sending unit 1210 may be a transceiver 1330. The network device 1200 may further include a processor 1310 and a memory 1320, as specifically shown in FIG13 .

[0211] Figure 13 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 13 indicate that the unit or module is optional. Apparatus 1300 may be used to implement the method described in the above method embodiment. Apparatus 1300 may be a chip, a terminal device, or a network device.

[0212] The device 1300 may include one or more processors 1310. The processor 1310 may support the device 1300 to implement the method described in the method embodiment above. The processor 1310 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0213] The apparatus 1300 may further include one or more memories 1320. The memories 1320 store programs that can be executed by the processor 1310, causing the processor 1310 to perform the methods described in the above method embodiments. The memories 1320 may be independent of the processor 1310 or integrated into the processor 1310.

[0214] The apparatus 1300 may further include a transceiver 1330. The processor 1310 may communicate with other devices or chips via the transceiver 1330. For example, the processor 1310 may transmit and receive data with other devices or chips via the transceiver 1330.

[0215] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0216] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0217] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal or network device provided in the embodiments of the present application, and the computer program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0218] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0219] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0220] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0221] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0222] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0223] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0224] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0225] In the embodiments of this application, the term "include" can refer to direct inclusion or indirect inclusion. Alternatively, the term "include" in the embodiments of this application can be replaced with "indicates" or "is used to determine." For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B."

[0226] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0227] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely 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, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0228] The units described 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 to achieve the purpose of this embodiment according to actual needs.

[0229] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0230] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0231] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: The terminal device performs a first operation according to the first information; The first information includes one or more of the following information: network energy saving NES information of the first cell where the terminal device is located, NES information of the second cell, and a first conditional switching threshold related to the NES state of the first cell and / or the NES state of the second cell; the first operation includes one or more of the following: Determine a cell that meets the conditional handover requirements; Determine a first time to switch from the first cell to the second cell; and The third cell is measured in a first time period between a second moment and the first moment to determine whether the third cell meets the conditional switching requirement, the second moment being the moment when the terminal device determines that the second cell meets the conditional switching requirement.

2. The method according to claim 1, characterized in that The first conditional switching threshold includes one or more of the following information: a value of the first condition switching threshold; A first difference between the first conditional switching threshold and a reference threshold.

3. The method according to claim 2, characterized in that The reference threshold satisfies one or more of the following: configured by the network device, pre-configured, or specified by the protocol.

4. The method according to claim 2 or 3, characterized in that: The first conditional switching threshold satisfies one or more of the following: configured by a network device, pre-configured, or specified by a protocol.

5. The method according to any one of claims 2 to 4, characterized in that: The first conditional switching threshold includes one or more of the following thresholds: A second conditional switching threshold when the first cell is in a power saving state; A third conditional switching threshold when the first cell is in a non-power saving state; A fourth conditional switching threshold when the second cell is in a power saving state; A fifth conditional switching threshold when the second cell is in a non-power saving state.

6. The method according to any one of claims 1 to 5, characterized in that The first time is determined according to one or more of the following information: the first information; the second moment; Whether the terminal device has data to send and / or receive at the second moment.

7. The method according to claim 6, characterized in that The first information is used to indicate a power saving time period of the first cell. If the second time is within the power saving time period of the first cell, the first time is determined according to the second time.

8. The method according to claim 6, characterized in that The first information is used to indicate a non-power saving time period of the first cell. If the second time is within the non-power saving time period of the first cell, the first time is determined according to an end time of the non-power saving time period of the first cell.

9. The method according to any one of claims 6 to 8, characterized in that: If the terminal device has data to send and / or receive at the second moment, the first moment is determined according to the end moment of the data sending and / or receiving.

10. The method according to any one of claims 6 to 8, characterized in that: If the terminal device has no data to send and / or receive at the second moment, the first moment is determined based on the second moment.

11. The method according to any one of claims 6 to 10, characterized in that: The first information is used to indicate a non-power saving time period of the second cell. If the second moment is within the non-power saving time period of the second cell, the first moment is determined according to the second moment.

12. The method according to any one of claims 6 to 10, characterized in that: The first information is used to indicate the power saving time period of the second cell. If the second moment is within the power saving time period of the second cell, the first moment is determined according to the second moment and the start moment of the non-power saving time period of the second cell.

13. The method according to claim 12, characterized in that The first time is within a first time period before a start time of a non-power saving time period of the second cell.

14. The method according to claim 13, characterized in that The first duration is the duration required for the terminal device to complete random access.

15. The method according to claim 14, characterized in that The time difference is equal to the first duration.

16. The method according to any one of claims 13 to 15, characterized in that The first duration satisfies one or more of the following: configured by the network device, pre-configured, or specified by a protocol.

17. The method according to any one of claims 1 to 16, characterized in that The time when the NES state of the first cell changes is the first change time, and the time when the NES state of the second cell changes is the second change time; The terminal device performing a first operation according to the first information includes: At the first change moment or the second change moment, the terminal device performs a first operation according to the first information.

18. The method according to any one of claims 1 to 17, characterized in that Whether the terminal device needs to measure the third cell within the first time period is indicated by first indication information, and the first indication information satisfies one or more of the following: configured by network equipment, pre-configured, or specified by a protocol.

19. The method according to any one of claims 1 to 18, characterized in that In a case where the third cell meets the conditional switching requirement, determining the second cell or the third cell as the accessed cell according to one or more of the following information: First moment; Second moment; A third moment, the third moment being a switching moment from the first cell to the third cell; The fourth moment is the moment when the terminal device determines that the third cell meets the conditional switching requirements.

20. The method according to any one of claims 1 to 19, characterized in that Also includes: The terminal device receives second indication information; The second indication information is used to indicate the first information.

21. A wireless communication method, characterized in that: The method comprises: The network device sends an indication message; The indication information includes second indication information, the second indication information is used to indicate first information, and the first information includes one or more of the following information: network energy saving NES information of the first cell where the terminal device is located, NES information of the second cell, and a first conditional switching threshold related to the NES status of the first cell and / or the NES status of the second cell.

22. The method according to claim 21, characterized in that In a case where the network device is a network device corresponding to the first cell, the method further includes: The network device corresponding to the first cell receives third indication information sent by the network device corresponding to the second cell; The third indication information is used to indicate the NES information of the second cell.

23. The method according to claim 22, characterized in that The method further comprises: The network device corresponding to the first cell sends a request message to request sending the third indication information.

24. The method according to claim 22 or 23, characterized in that The indication information includes the unprocessed third indication information or the processed third indication information.

25. A terminal device, characterized in that: include: an execution unit, configured to execute a first operation according to the first information; The first information includes one or more of the following information: network energy saving NES information of the first cell where the terminal device is located, NES information of the second cell, and a first conditional switching threshold related to the NES state of the first cell and / or the NES state of the second cell; the first operation includes one or more of the following: Determine a cell that meets the conditional handover requirements; Determine a first time to switch from the first cell to the second cell; and The third cell is measured in a first time period between a second moment and the first moment to determine whether the third cell meets the conditional switching requirement, the second moment being the moment when the terminal device determines that the second cell meets the conditional switching requirement.

26. The terminal device according to claim 25, characterized in that: The first conditional switching threshold includes one or more of the following information: a value of the first condition switching threshold; A first difference between the first conditional switching threshold and a reference threshold.

27. The terminal device according to claim 26, characterized in that: The reference threshold satisfies one or more of the following: configured by the network device, pre-configured, or specified by the protocol.

28. The terminal device according to claim 26 or 27, characterized in that: The first conditional switching threshold satisfies one or more of the following: configured by a network device, pre-configured, or specified by a protocol.

29. The terminal device according to any one of claims 26 to 28, characterized in that: The first conditional switching threshold includes one or more of the following thresholds: A second conditional switching threshold when the first cell is in a power saving state; A third conditional switching threshold when the first cell is in a non-power saving state; A fourth conditional switching threshold when the second cell is in a power saving state; A fifth conditional switching threshold when the second cell is in a non-power saving state.

30. The terminal device according to any one of claims 25 to 29, characterized in that: The first time is determined according to one or more of the following information: the first information; the second moment; Whether the terminal device has data to send and / or receive at the second moment.

31. The terminal device according to claim 30, characterized in that: The first information is used to indicate a power saving time period of the first cell. If the second time is within the power saving time period of the first cell, the first time is determined according to the second time.

32. The terminal device according to claim 30, characterized in that: The first information is used to indicate a non-power saving time period of the first cell. If the second time is within the non-power saving time period of the first cell, the first time is determined according to an end time of the non-power saving time period of the first cell.

33. The terminal device according to any one of claims 30 to 32, characterized in that: If the terminal device has data to send and / or receive at the second moment, the first moment is determined according to the end moment of the data sending and / or receiving.

34. The terminal device according to any one of claims 30 to 32, characterized in that: If the terminal device has no data to send and / or receive at the second moment, the first moment is determined based on the second moment.

35. The terminal device according to any one of claims 30 to 34, characterized in that: The first information is used to indicate a non-power saving time period of the second cell. If the second moment is within the non-power saving time period of the second cell, the first moment is determined according to the second moment.

36. The terminal device according to any one of claims 30 to 35, characterized in that: The first information is used to indicate the power saving time period of the second cell. If the second moment is within the power saving time period of the second cell, the first moment is determined according to the second moment and the start moment of the non-power saving time period of the second cell.

37. The terminal device according to claim 36, characterized in that: The first time is within a first time period before a start time of a non-power saving time period of the second cell.

38. The terminal device according to claim 37, characterized in that: The first duration is the duration required for the terminal device to complete random access.

39. The terminal device according to claim 38, characterized in that: The time difference is equal to the first duration.

40. The terminal device according to any one of claims 37 to 39, characterized in that: The first duration satisfies one or more of the following: configured by the network device, pre-configured, or specified by a protocol.

41. The terminal device according to any one of claims 25 to 40, characterized in that: The time when the NES state of the first cell changes is the first change time, and the time when the NES state of the second cell changes is the second change time; The terminal device performing a first operation according to the first information includes: At the first change moment or the second change moment, the terminal device performs a first operation according to the first information.

42. The terminal device according to any one of claims 25 to 41, characterized in that: Whether the terminal device needs to measure the third cell within the first time period is indicated by first indication information, and the first indication information satisfies one or more of the following: configured by network equipment, pre-configured, or specified by a protocol.

43. The terminal device according to any one of claims 25 to 42, characterized in that: In a case where the third cell meets the conditional switching requirement, determining the second cell or the third cell as the accessed cell according to one or more of the following information: First moment; Second moment; A third moment, the third moment being a switching moment from the first cell to the third cell; The fourth moment is the moment when the terminal device determines that the third cell meets the conditional switching requirements.

44. The terminal device according to any one of claims 25 to 43, characterized in that: Also used for: receiving second indication information; The second indication information is used to indicate the first information.

45. A network device, characterized in that: The network equipment includes: A sending unit, used for sending instruction information; The indication information includes second indication information, the second indication information is used to indicate first information, and the first information includes one or more of the following information: network energy saving NES information of the first cell where the terminal device is located, NES information of the second cell, and a first conditional switching threshold related to the NES status of the first cell and / or the NES status of the second cell.

46. ​​The network device according to claim 45, characterized in that In a case where the network device is a network device corresponding to the first cell, the network device is further configured to: The network device corresponding to the first cell receives third indication information sent by the network device corresponding to the second cell; The third indication information is used to indicate the NES information of the second cell.

47. The network device according to claim 46, characterized in that The network device is also used for: The network device corresponding to the first cell sends a request message to request sending the third indication information.

48. The network device according to claim 46 or 47, characterized in that: The indication information includes the unprocessed third indication information or the processed third indication information.

49. A terminal device, characterized in that: The method comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory so that the terminal device executes the method according to any one of claims 1 to 20.

50. A network device, characterized in that: It comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory so that the network device executes the method as described in any one of claims 21-24.

51. A device, characterized in that The device comprises a processor, configured to call a program from a memory so as to enable the device to execute the method according to any one of claims 1 to 24.

52. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 24.

53. A computer-readable storage medium, characterized in that: A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 24.

54. A computer program product, characterized in that The method comprises a program which causes a computer to execute the method according to any one of claims 1 to 24.

55. A computer program, characterized in that The computer program enables a computer to execute the method according to any one of claims 1 to 24.

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