Communication method and device

Abstract

A communication method and apparatus for providing an energy-saving CHO configuration and enabling scheme. The method comprises the following steps: receiving energy-saving condition switching CHO configuration information from network equipment, wherein the energy-saving CHO configuration information comprises a CHO trigger condition and information of at least one candidate cell; when it is determined that the first condition is met, a target cell is selected from the at least one candidate cell, and the target cell is a cell meeting the CHO triggering condition; the first condition comprises at least one of the following items: cell discontinuous transmission configuration activation; or the discontinuous reception configuration of the cell is activated. Through the scheme, the terminal equipment can clearly start the energy-saving CHO when the energy-saving configuration is activated, so that an energy-saving CHO scheme is provided when the energy-saving configuration is activated, the terminal equipment can be conveniently and quickly switched to other cells from a source cell when the energy-saving technology is not supported, and the energy-saving effect of the source cell is ensured.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0002] Cell discontinuous transmission (cell DTX) technology and cell discontinuous reception (cell DRX) technology are two important ways to save energy for network equipment. Among them, cell DTX enables the network to perform downlink transmission with terminal equipment only in a specified time period, and not perform downlink transmission in other time periods, so that the corresponding shutdown technology can be adopted to achieve energy saving of network equipment. Cell DRX enables the network to receive uplink signals in a specified time period, and stop uplink service transmission with terminal equipment at other times, so as to achieve energy saving of network equipment.

[0003] The base station can configure cell DTX parameters and cell DRX parameters for the terminal devices in the cell. After receiving the configuration, the terminal device can directly activate the cell DTX configuration and cell DRX configuration, or the terminal device can activate the cell DTX configuration and cell DRX configuration after receiving the activation signaling sent by the base station, so that the terminal device can interact with the base station for signals according to the shutdown time of the base station.

[0004] Conditional handover (CHO) means that during the mobility handover process of the terminal device, before the wireless environment between the terminal device and the source base station further deteriorates, the source base station can send a handover command to the terminal device in advance. The handover command includes the wireless parameter configuration of the candidate target base station and the triggering conditions for the handover execution, so that the terminal device knows in advance how to access the target base station. After the terminal device finds a base station that meets the handover triggering conditions among the candidate target base stations, it can independently decide to initiate the handover execution.

[0005] In a cell where energy-saving technology is enabled, in order to enable terminal devices that do not support energy-saving technology to switch to other cells so as not to affect the energy-saving effect of the current cell, the base station can configure energy-saving CHO for the terminal devices in the cell. Compared with ordinary CHO, energy-saving CHO can make it easier for terminal devices to switch to other cells, but there is no solution for when the terminal devices should execute energy-saving CHO. Summary of the invention

[0006] The present application provides a communication method and apparatus for providing an energy-saving CHO configuration and activation solution.

[0007] In a first aspect, the present application provides a communication method, the execution subject of the method may be a terminal device or a chip, a chip system or a circuit located in the terminal device, and the method may be implemented by the following steps: receiving energy-saving condition switching CHO configuration information from a network device, the energy-saving CHO configuration information including a CHO trigger condition and information of at least one candidate cell; when it is determined that a first condition is met, selecting a target cell from the at least one candidate cell, the target cell being a cell that meets the CHO trigger condition; the first condition includes at least one of the following: activation of the cell discontinuous transmission configuration; or activation of the cell discontinuous reception configuration.

[0008] In the above method, the terminal device can clearly specify when which energy-saving configuration is activated to enable energy-saving CHO, thereby providing an energy-saving CHO solution when the energy-saving configuration is activated, so that the terminal device can quickly switch from the source cell to other cells when the energy-saving technology is not supported, thereby ensuring the energy-saving effect of the source cell.

[0009] In one possible design, when it is determined that the first condition is met, before selecting the target cell from the at least one candidate cell, the method also includes: receiving indication information from the network device, the indication information being used to indicate the first condition.

[0010] Through this design, the network device can indicate the first condition to the terminal device to flexibly instruct the terminal device to enable energy-saving CHO when which energy-saving configuration is activated.

[0011] In one possible design, the energy-saving CHO configuration information also includes indication information, and the indication information is used to indicate the first condition.

[0012] Through this design, the network device can indicate the first condition to the terminal device through the energy-saving CHO configuration information, saving signaling.

[0013] In one possible design, before determining that the first condition is satisfied and selecting the target cell from the at least one candidate cell, the method also includes: receiving first configuration information from the network device, the first configuration information being used to indicate the discontinuous transmission configuration of the cell and / or the discontinuous reception configuration of the cell.

[0014] In one possible design, the determination that the first condition is satisfied includes: receiving a first signaling from the network device, the first signaling being used to indicate activation of an energy-saving configuration corresponding to the first condition, the energy-saving configuration corresponding to the first condition being a discontinuous transmission configuration of the cell, and / or a discontinuous reception configuration of the cell.

[0015] Through this design, when the terminal device receives the first signaling sent by the network device, and the first signaling is used to activate the energy-saving configuration corresponding to the first condition, the terminal device can determine that the first condition is met and enable the energy-saving CHO, so that the energy-saving CHO can be enabled by activating the signaling of the energy-saving configuration.

[0016] In one possible design, the CHO trigger condition includes information about multiple measurement events when the discontinuous transmission configuration of the cell is activated, and information about multiple measurement events when the discontinuous reception configuration of the cell is activated.

[0017] Through this design, the CHO trigger condition in the energy-saving CHO configuration information may include information about measurement events corresponding to activation of different energy-saving configurations, so that different CHO trigger conditions can be set for different energy-saving configurations, thereby more flexibly realizing cell switching of terminal equipment.

[0018] In one possible design, the information of the measurement event includes at least one of a threshold value, a bias value, a time delay, and an amplitude delay.

[0019] In one possible design, the energy-saving CHO configuration information also includes time information; and selecting the target cell from the at least one candidate cell includes: selecting the target cell from the at least one candidate cell within a timing duration indicated by the time information.

[0020] Through this design, the terminal device can select a target cell from at least one candidate cell according to the CHO trigger condition within the timing duration indicated by the time information in the energy-saving CHO configuration information, thereby limiting the time for the terminal device to search for the target cell and preventing the terminal device from being unable to find the target cell for a long time and unable to stop searching.

[0021] In one possible design, the method also includes: when the timing duration indicated by the time information ends, determining that there is no target cell that meets the CHO trigger condition in the at least one candidate cell, and sending a first message to the network device, wherein the first message is used to indicate that the terminal device has failed to switch cells.

[0022] Through this design, when the terminal device cannot complete the cell switching within the timing period, it can notify the network device of the cell switching failure so that the network device can adjust the cell switching strategy in time.

[0023] In one possible design, after sending the first message to the network device, the method further includes: receiving a second signaling from the network device, the second signaling being used to instruct the terminal device to switch to the first cell.

[0024] In one possible design, after sending the first message to the network device, the method further includes: receiving a third signaling from the network device, the third signaling being used to indicate an update of the energy-saving CHO configuration information.

[0025] Through the above design, when the terminal device cannot complete the cell switching within the timing time, after notifying the network device of the cell switching failure, the network device can adjust the energy-saving CHO configuration in time, or directly instruct the terminal device to switch to the first cell, thereby ensuring the efficiency of the cell switching.

[0026] In one possible design, the method also includes: receiving a fourth signaling from the network device within the timing duration indicated by the time information, the fourth signaling being used to indicate deactivation of the energy-saving configuration corresponding to the first condition; the energy-saving configuration corresponding to the first condition is the discontinuous transmission configuration of the cell, and / or the discontinuous reception configuration of the cell; stopping selecting the target cell from the at least one candidate cell after the timing duration indicated by the time information ends; or stopping selecting the target cell from the at least one candidate cell after receiving the fourth signaling.

[0027] Through this design, when the terminal device receives a signal from the network device instructing to activate the energy-saving configuration corresponding to the first condition within the timing period, the terminal device can immediately stop searching for the target cell, or the terminal device can continue to search for the target cell and switch within the timing period, and stop searching for the target cell after the timing period ends, thereby flexibly realizing the activation and deactivation of the energy-saving CHO.

[0028] In one possible design, the first configuration information includes the cell identifier of the cell that activates the cell's discontinuous transmission configuration by default and / or activates the cell's discontinuous reception configuration by default; or the first configuration information includes the cell identifier of the cell that activates the cell's discontinuous transmission configuration and / or activates the cell's discontinuous reception configuration non-by default.

[0029] In one possible design, before receiving the first configuration information from the network device, the method also includes: receiving a fifth signaling from the network device, the fifth signaling including a cell identifier of a cell that activates the cell discontinuous transmission configuration by default and / or activates the cell discontinuous reception configuration by default; or the fifth signaling includes a cell identifier of a cell that activates the cell discontinuous transmission configuration and / or activates the cell discontinuous reception configuration by non-default.

[0030] Through the above design, the network device can set the cell with the energy-saving configuration activated by default, and indicate to the terminal device the cell with the cell DTX configuration activated by default and / or the cell DRX configuration activated by default, so that the terminal device can clearly know which cells need to activate the energy-saving configuration by default when receiving the energy-saving configuration.

[0031] In the second aspect, the present application provides a communication method, the execution subject of the method can be a network device or a chip, chip system or circuit located in the network device, and the method can be implemented by the following steps: sending energy-saving condition switching CHO configuration information to the terminal device, the energy-saving CHO configuration information includes a CHO trigger condition, information of at least one candidate cell and indication information, and the indication information is used to indicate a first condition; wherein the first condition is a condition for starting the terminal device to select a target cell from the at least one candidate cell according to the CHO trigger condition; the first condition includes at least one of the following: cell discontinuous transmission configuration activation; or cell discontinuous reception configuration activation.

[0032] In the above method, when the network device sends the energy-saving CHO configuration information to the terminal device, the network device can carry indication information in the energy-saving CHO configuration information to indicate the terminal device when which energy-saving configuration is activated to enable the energy-saving CHO, thereby clarifying the enabling conditions of the energy-saving CHO.

[0033] In one possible design, the method further includes: sending first configuration information to the terminal device, the first configuration information being used to indicate a cell discontinuous transmission configuration and / or a cell discontinuous reception configuration.

[0034] In one possible design, the method also includes: sending a first signaling to the terminal device, the first signaling is used to indicate activation of an energy-saving configuration corresponding to the first condition, the energy-saving configuration corresponding to the first condition is a discontinuous transmission configuration of the cell, and / or a discontinuous reception configuration of the cell.

[0035] In one possible design, the CHO trigger condition includes information about multiple measurement events when the discontinuous transmission configuration of the cell is activated, and information about multiple measurement events when the discontinuous reception configuration of the cell is activated.

[0036] In one possible design, the information of the measurement event includes at least one of a threshold value, a bias value, a time delay, and an amplitude delay.

[0037] In one possible design, the energy-saving CHO configuration information also includes time information, and the time information is used to instruct the terminal device to select the target cell from the at least one candidate cell according to the CHO trigger condition within a timing duration indicated by the time information.

[0038] In one possible design, the method further includes: receiving a first message from the terminal device, the first message being used to indicate that the terminal device has failed to switch cells.

[0039] In one possible design, after receiving the first message from the terminal device, the method further includes: sending a second signaling to the terminal device, wherein the second signaling is used to instruct the terminal device to switch to the first cell.

[0040] In one possible design, after receiving the first message from the terminal device, the method further includes: sending a third signaling to the terminal device, where the third signaling is used to indicate an update of the energy-saving CHO configuration information.

[0041] In one possible design, the method also includes: sending a fourth signaling to the terminal device, the fourth signaling being used to indicate deactivation of an energy-saving configuration corresponding to the first condition; the energy-saving configuration corresponding to the first condition is a discontinuous transmission configuration of the cell, and / or a discontinuous reception configuration of the cell.

[0042] In one possible design, the first configuration information includes the cell identifier of the cell that activates the cell's discontinuous transmission configuration by default and / or activates the cell's discontinuous reception configuration by default; or the first configuration information includes the cell identifier of the cell that activates the cell's discontinuous transmission configuration and / or activates the cell's discontinuous reception configuration non-by default.

[0043] In one possible design, before sending the first configuration information to the terminal device, the method also includes: sending a fifth signaling to the terminal device, the fifth signaling including a cell identifier of a cell that activates the cell's discontinuous transmission configuration by default and / or activates the cell's discontinuous reception configuration by default; or the fifth signaling includes a cell identifier of a cell that activates the cell's discontinuous transmission configuration by non-default and / or activates the cell's discontinuous reception configuration by non-default.

[0044] In a third aspect, the present application further provides a communication device, which is a terminal device or a chip in a terminal device. The communication device has the function of implementing any of the methods provided in the first aspect above. The communication device can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0045] In one possible design, the communication device includes: a processor, which is configured to support the communication device to perform the corresponding functions of the terminal device in the method shown above. The communication device may also include a memory, which can be coupled to the processor and stores the necessary program instructions and data of the communication device. Optionally, the communication device also includes an interface circuit, which is used to support communication between the communication device and equipment such as a service satellite, such as the transmission and reception of data or signals. Exemplarily, the communication interface can be a transceiver, circuit, bus, module or other type of communication interface.

[0046] In one possible design, the communication device includes corresponding functional modules, which are respectively used to implement the steps in the above method. The functions can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0047] In one possible design, the structure of the communication device includes a processing unit (or processing unit) and a communication unit (or communication unit). These units can execute the corresponding functions of the terminal device in the above method example. For details, please refer to the description of the method provided in the first aspect, which will not be repeated here.

[0048] In a fourth aspect, the present application further provides a communication device, which is a network device or a chip in a network device. The communication device has the function of implementing any method provided in the second aspect above. The communication device can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0049] In one possible design, the communication device includes: a processor, which is configured to support the communication device to perform the corresponding functions of the network device in the method shown above. The communication device may also include a memory, which can be coupled to the processor and stores the necessary program instructions and data of the communication device. Optionally, the communication device also includes an interface circuit, which is used to support communication between the communication device and a terminal device or other device, such as the transmission and reception of data or signals. Exemplarily, the communication interface can be a transceiver, circuit, bus, module or other type of communication interface.

[0050] In one possible design, the communication device includes corresponding functional modules, which are respectively used to implement the steps performed by the network device in the above method. The functions can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0051] In one possible design, the structure of the communication device includes a processing unit (or processing unit) and a communication unit (or communication unit). These units can perform the corresponding functions of the network device in the above method example. For details, please refer to the description of the method provided in the second aspect, which will not be repeated here.

[0052] In a fifth aspect, a communication device is provided, comprising a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or to send signals from the processor to other communication devices outside the communication device, and the processor is used to implement the method in the aforementioned first aspect and any possible design through logic circuits or execution code instructions.

[0053] In a sixth aspect, a communication device is provided, comprising a processor and an interface circuit, the interface circuit being used to receive signals from other communication devices outside the communication device and transmit them to the processor or to send signals from the processor to other communication devices outside the communication device, the processor being used to implement the method in the aforementioned second aspect and any possible design through logic circuits or execution code instructions.

[0054] In the seventh aspect, a computer-readable storage medium is provided, which stores a computer program or instruction. When the computer program or instruction is executed by a processor, the method of any one of the first and second aspects and any possible design is implemented.

[0055] In an eighth aspect, a computer program product storing instructions is provided, which, when executed by a processor, implements the method in any one of the first and second aspects and any possible design.

[0056] In a ninth aspect, a chip system is provided, the chip system including a processor and a memory, for implementing the method in any of the first to second aspects and any possible design. The chip system may be composed of a chip, or may include a chip and other discrete devices.

[0057] In a tenth aspect, a communication system is provided, the system comprising the apparatus described in the first aspect (such as a terminal device) and the apparatus described in the second aspect (such as a network device).

[0058] The technical effects that can be achieved by the technical solutions of any of the third to tenth aspects mentioned above can be described with reference to the technical effects that can be achieved by the technical solutions of the first to second aspects mentioned above, and the repeated parts will not be repeated. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 is a schematic diagram of a cell DTX;

[0060] Figure 2 A schematic diagram of a CHO process;

[0061] Figure 3 is a schematic diagram of a communication system applicable to an embodiment of the present application;

[0062] Figure 4 A flow chart of a communication method provided in an embodiment of the present application;

[0063] Figure 5 A schematic diagram of a signaling structure provided for an embodiment of the present application;

[0064] Figure 6 A flow chart of a communication method provided in an embodiment of the present application;

[0065] Figure 7 A flow chart of a communication method provided in an embodiment of the present application;

[0066] Figure 8 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0067] Fig. 9 A schematic diagram of the structure of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. Among them, in the description of the embodiments of the present application, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0069] It should be understood that in the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can represent: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c can be single or multiple.

[0070] The following introduces terms or background related to the embodiments of the present application:

[0071] 1. The terminal device involved in the embodiments of the present application is an entity on the user side for receiving or transmitting signals. The terminal device may be a device that provides voice and / or data connectivity to the user, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device may also be other processing devices connected to a wireless modem. The terminal device may communicate with a radio access network (RAN). The terminal device may also be referred to as a wireless terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a mobile station, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, or a user equipment (UE), etc. The terminal device may be a mobile terminal, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device, which exchanges language and / or data with a wireless access network. For example, the terminal device may also be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), etc. Common terminal devices include, for example, mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices such as smart watches, smart bracelets, pedometers, etc., but the embodiments of the present application are not limited thereto.

[0072] 2. The network device involved in the embodiments of the present application is an entity on the network side for transmitting or receiving signals. For example, the network device can be an evolutionary Node B (eNB or e-NodeB) in LTE, a new radio controller (NR controller), a gNode B (gNB) in a 5G system, a centralized unit, a new wireless base station, a radio frequency remote module, a micro base station, a relay, a distributed unit, a transmission reception point (TRP) or a transmission point (TP) or any other wireless access device, but the embodiments of the present application are not limited thereto. The network device can cover one or more cells.

[0073] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0074] 3. Cell discontinuous transmission (cell DTX), cell discontinuous reception (cell DRX):

[0075] The cell managed by the network device performs downlink transmission with the terminal device in a specified time period, and does not perform downlink transmission in other time periods, so as to achieve energy saving of the network device. Figure 1 Schematic diagram of a cell DTX. Figure 1As shown, cell 1 adopts a periodic cell DTX configuration. The cell DTX configuration has an activation period and an inactive period. The activation period is the time period when the cell DTX is turned on (cell DTXon). The inactive period is the time period when the cell DTX is turned off (off). In the time period of cell DTX on, cell 1 performs downlink transmission, including transmission of downlink service data with the terminal device. In the time period of cell DTX off, cell 1 at least stops the transmission of downlink service data between the terminal device. In some scenarios, in the time period of cell DTX off, certain signals that need to be sent periodically are also stopped, such as at least one of a synchronization signal block (SSB), a downlink channel state information reference signal (CSI-RS), or semi-persistent scheduling (SPS). It can be understood that the longer the time period of cell DTX off, the longer the shutdown time that the network device can take, and the deeper the shutdown depth, so as to obtain better energy saving effect. However, it will increase the delay of service transmission of the terminal device.

[0076] Similarly, cell DRX means that cell 1 adopts cell DRX configuration, and the cell DRX configuration has an activation period and an inactivation period. The activation period is the time period when cell DRX is turned on (cell DRX on). The inactivation period is the time period when cell DRX is turned off (off). During the cell DRX on period, cell 1 receives uplink signals, including the transmission of uplink service data with the terminal device; during the cell DRX off period, cell 1 at least stops the transmission of uplink service data with the terminal device.

[0077] The network device can send cell DTX configuration information to the terminal device in cell 1. After receiving the cell DTX configuration information, the terminal device can directly activate the cell DTX configuration, or receive the activation signaling sent by the network device to activate the cell DTX configuration. Similarly, the network device can also send cell DRX configuration information to the terminal device in cell 1. After receiving the cell DRX configuration information, the terminal device can directly activate the cell DRX configuration, or receive the activation signaling sent by the network device to activate the cell DRX configuration. After the terminal device activates the cell DTX configuration and / or the cell DRX configuration, data can be exchanged with the network device according to the activation period and inactivation period of the cell DTX of the network device, and / or the activation period and inactivation period of the cell DRX.

[0078] It should be noted that cell DTX and cell DRX can be used together or separately. For example, the network device can enable cell DTX and cell DRX at the same time, or enable either of them separately.

[0079] 4. Conditional handover (CHO)

[0080] CHO means that during the UE's mobility switching process, before the wireless environment between the terminal device and the source base station further deteriorates, the source base station can send a switching command (with the wireless parameter configuration of the candidate base station and the triggering conditions for the switching execution) to the terminal device in advance, so that the terminal device knows in advance how to access the target base station. After the terminal device finds the target base station that meets the switching triggering conditions among the candidate base stations, it can independently decide to initiate the switching execution and switch to the target base station. Compared with ordinary handover (HO), this can save the following two signalings: the signaling that the terminal device reports the measurement information of the target base station to the source base station; after the source base station receives the measurement information, it sends a switching command to instruct the terminal device to switch to the target base station. CHO increases the chance of successful message transmission, prevents the measurement report from failing to report to the base station or the switching command issued by the base station from failing to reach the terminal device, and can greatly improve the success rate of the switching.

[0081] Illustratively, the CHO process can be as follows Figure 2 As shown:

[0082] S201, a source base station sends an RRC reconfiguration message to a UE, where the RRC reconfiguration message carries CHO configuration information corresponding to a plurality of candidate cells.

[0083] In CHO, the network can configure one or more candidate cells for the UE. If the network configures multiple candidate cells for the UE, the network can send the CHO configuration information corresponding to the multiple candidate cells to the UE through one radio resource control (RRC) message or multiple RRC messages. The above RRC message can reuse the existing RRC reconfiguration message. For example, the RRC message can be an RRC reconfiguration message carrying a synchronization reconfiguration information element (reconfiguration with sync), or the RRC message can also be an RRC connection reconfiguration message carrying a mobility control information information element (mobility control info). The CHO configuration information may include a CHO triggering condition (or execution condition), relevant information of the candidate cell (e.g., a cell radio network temporary identifier (C-RNTI) allocated by the candidate cell to the terminal device, physical random access channel (RACH) resource information required to access the candidate cell, a cell global identification code (CGI) of the candidate cell, and / or a physical cell identifier (PCI) of the candidate cell, and frequency information corresponding to the candidate cell (wherein the frequency information includes one or more of the following: an absolute frequency of a synchronization signal / physical broadcast channel block (SS / PBCH block, SSB) (e.g., absoluteFrequencySSB), an absolute frequency position of a reference resource module (common RB0) (e.g., absoluteFrequencyPointA), a frequency bandwidth list (e.g., frequencyBandList), a subcarrier space (SCS) specific carrier list (e.g., scs-SpecificCarrierList), etc.), optionally, the relevant information of the candidate cell may also include resource information corresponding to the candidate cell (e.g., physical layer configuration parameters, media access control (MAC) control (MAC) layer configuration parameters, radio link control (RLC) layer configuration parameters, packet data convergence protocol (PDCP) layer configuration parameters, service data adaption protocol (SDAP) layer configuration parameters, RRC layer configuration parameters, etc.).

[0084] In addition, the CHO triggering condition (or execution condition) may include a CHO execution event type and a corresponding threshold value, and a candidate cell may be configured with one or more CHO execution conditions. For example, Table 1 is an example of a CHO triggering condition:

[0085] Table 1 Example of CHO execution events

[0086]

[0087]

[0088] Among them, Ms in Table 1 represents the measurement result of the serving cell, Mn represents the measurement result of the neighboring cell, Hys represents the amplitude hysteresis of the measurement result, Thresh, Thresh1, and Thresh2 represent threshold values, TimeTOTrigger represents the time hysteresis, that is, the duration for satisfying the switching condition, Ofn represents the frequency offset of the neighboring cell, Ocn represents the cell offset (cell individual offset, CIO) of the neighboring cell, Ofs represents the frequency offset of the serving cell, Ocs represents the CIO of the serving cell, and Off represents the offset of the measurement result.

[0089] S202, the UE decodes the RRC reconfiguration message, and if the decoding is successful, sends an RRC reconfiguration completion message to the source base station.

[0090] S203: The UE determines whether the candidate cell meets the handover triggering / execution condition according to the RRC reconfiguration message, and uses the candidate cell that meets the handover triggering / execution condition as the target cell.

[0091] Specifically, the UE may determine whether the CHO triggering / execution condition is met according to the CHO configuration information.

[0092] The UE can measure the measurement object according to the CHO configuration information, and compare the measurement result with the CHO trigger condition to determine whether the CHO trigger condition is met. Among them, the measurement objects mainly include SSB frequency, SSB subcarrier spacing, SSB measurement timing configuration (SMTC) configuration, whitelist cells and blacklist cells. The SMTC configuration can effectively instruct the UE to search for the time window of SSB to reduce unnecessary measurement power consumption of the UE. The whitelist cell and blacklist cell are lists of cells to be measured configured by the network equipment. For cells included in the blacklist, the UE will no longer perform event measurement and measurement reporting on them, while the whitelist cell is a cell at which the UE will perform event measurement and measurement reporting at its measurement frequency. Each measurement report has a separate identifier (reportConfigId), and the types of measurement reports can be divided into event-triggered reports and periodic triggered reports.

[0093] In one example, for example, corresponding to candidate cell A, the configured CHO measurement event type is an A3 event, and the configured corresponding threshold value is a first threshold value, then, when the cell signal quality of candidate cell A is higher than the first threshold value of the cell signal quality of the serving cell, it can be considered that candidate cell A meets the CHO trigger condition, and the candidate cell A can be determined as the target cell, and the signal quality can include at least one of reference signal received power (reference signal received power, RSRP), reference signal received quality (reference signal received quality, RSRQ), and signal to interference plus noise ratio (signal to interference plus noise ratio, SINR), for example, the signal quality includes RSRP and RSRQ, or the signal quality includes RSRP and SINR, or others, which are not limited to this). In another example, for example, corresponding to candidate cell B, if the configured CHO measurement event type is an A5 event, and the configured corresponding threshold value is a second threshold value and a third threshold value, then when the cell signal quality of candidate cell B is higher than the second threshold value, and the cell signal quality of the serving cell is lower than the third threshold value, it can be considered that candidate cell B meets the CHO trigger condition, and the candidate cell B can be determined as the target cell.

[0094] S204, the UE performs a random access process with the determined target cell.

[0095] S205, the UE sends an RRC reconfiguration complete message to the target cell to notify the target base station that the conditional handover is completed.

[0096] In a cell supporting energy-saving configuration, in order to enable UE that does not support energy-saving technology to switch to other cells so as not to affect the energy-saving effect of the current cell, a CHO execution condition in an energy-saving cell is proposed, which is referred to as energy-saving CHO in the embodiment of the present application. The energy-saving CHO configuration can be pre-configured to the UE instead of being configured to the UE when CHO needs to be executed, but there is no solution for when the terminal device executes the energy-saving CHO.

[0097] Based on the above problems, the embodiments of the present application provide a communication method and apparatus to solve the problem of the timing of executing energy-saving CHO. In one embodiment, the terminal device executes energy-saving CHO when determining that a first condition is met; the first condition includes activation of the cell discontinuous transmission configuration and / or activation of the cell discontinuous reception configuration.

[0098] The technical solution provided in the embodiments of the present application can be applied to the fourth generation mobile communication technology (the 4th generation, 4G) system, such as the LTE system, or can be applied to the 5G system, such as the new radio (new radio, NR) system, or can also be applied to the next generation mobile communication system or other future communication systems, such as the sixth generation mobile communication technology (the 6th generation, 6G) system, etc., without specific limitation. The technical solution provided in the embodiments of the present application can be applied to the SL transmission process, such as the D2D scenario, such as the LTE-D2D scenario or the NR-D2D scenario, etc., or can be applied to the V2X scenario, such as the NR-V2X scenario, etc. For example, it can be used in the fields of intelligent driving, assisted driving, or intelligent connected vehicles.

[0099] For example, Figure 3 is a schematic diagram of a communication system applicable to an embodiment of the present application. The communication system may include at least one network device, such as Figure 3 The network device 101, the network device 102 and the network device 103 are shown. The communication system 100 may also include at least one terminal device. Figure 3 In the example, three terminal devices are taken, namely, terminal device 104, terminal device 105, and terminal device 106. Network device 101 can use wireless resources to communicate with terminal device 104, terminal device 105, and terminal device 106 respectively, and provide network services for the terminal devices. The network device can manage one or more cells, such as Figure 3 As shown, the network device 101 manages the cell 107 and the network device 102 manages the cell 108. The coverage of different cells is different. For example, the network device 101 can communicate with the terminal device 104 in the cell 107 through the cell 107.

[0100] In some embodiments, the communication system may further include core network equipment, such as AMF or UPF, etc. Figure 3 This is only an example of a communication system applicable to the embodiment of the present application. Figure 3 The device form does not represent the actual form of network devices and terminal devices.

[0101] In order to better introduce the embodiments of the present application, the communication method provided by the embodiments of the present application is introduced below in conjunction with the accompanying drawings.

[0102] Embodiment 1:

[0103] Figure 4 A flow chart of a communication method provided in an embodiment of the present application. The communication method can be executed by a network device and a terminal device. Figure 4 , the method comprises the following steps:

[0104] S401: The network device sends energy-saving CHO configuration information to the terminal device.

[0105] Optionally, the energy-saving CHO configuration information includes a CHO triggering condition and information of at least one candidate cell, wherein the CHO triggering condition refers to a condition that triggers the terminal device to switch to a target cell, and the target cell is a cell that meets the CHO triggering condition in at least one candidate cell.

[0106] In an embodiment of the present application, the CHO trigger condition may include information about multiple measurement events when the cell discontinuous transmission configuration is activated and information about multiple measurement events when the cell discontinuous reception configuration is activated. The information of the measurement event may, for example, include at least one of a threshold value, a bias value, a time hysteresis, and an amplitude hysteresis. In implementation, the CHO trigger condition may include multiple measurement events configured when the cell DTX configuration is activated and the threshold value or bias value corresponding to each measurement event, and multiple measurement events configured when the cell DRX configuration is activated and the threshold value or bias value corresponding to each measurement event; or the CHO trigger condition may be respectively for the same measurement event, the threshold value or bias value corresponding to the cell DTX configuration when activated, and the threshold value or bias value corresponding to the cell DRX configuration when activated.

[0107] For example, the CHO triggering condition may include: when the cell DTX configuration is activated, the bias value configured for the measurement event A3 is 1, and the threshold value configured for the measurement event A4 is 2; when the cell DRX configuration is activated, the bias value configured for the measurement event A3 is 3.

[0108] For another example, the CHO triggering condition may include: for measurement event A3, when the cell DTX configuration is activated, the configured bias value is 1, and when the cell DRX configuration is activated, the configured bias value is 3.

[0109] Optionally, the energy-saving CHO configuration information may further include indication information, where the indication information is used to indicate a first condition. The first condition is a condition for the terminal device to determine whether to enable the energy-saving CHO. Specifically, the first condition is used to indicate when which energy-saving configuration is activated, the terminal device can enable the energy-saving CHO. It should be noted that in the embodiments of the present application, enable, activate and enable can be used interchangeably.

[0110] In one implementation, the indication information may occupy n bits in the energy-saving CHO configuration information to indicate when which energy-saving configuration is activated, the terminal device can enable the energy-saving CHO. For example, assuming that the indication information occupies 2 bits in the energy-saving CHO configuration information, when the indication information is 00, it means that the energy-saving CHO can be enabled when the cell DTX configuration is activated; when the indication information is 01, it means that the energy-saving CHO can be enabled when the cell DRX configuration is activated; when the indication information is 10, it means that the energy-saving CHO can be enabled when both the cell DTX configuration and the cell DRX configuration are activated; when the indication information is 11, it means that the energy-saving CHO can be enabled when any of the energy-saving configurations in the cell DTX configuration and the cell DRX configuration is activated, or the indication information may indicate other mechanisms for enabling the energy-saving CHO, which is not limited in the embodiments of the present application.

[0111] In another implementation manner, the indication information may be in an enumeration manner, enumerating when which energy-saving configuration is activated, the energy-saving CHO can be enabled. For example, the indication information may be {cell DTX, cell DRX, both, or other}, indicating that the energy-saving CHO can be enabled when the cell DTX configuration is activated or the cell DRX configuration is activated or both the cell DTX configuration and the cell DRX configuration are activated. Of course, the indication information may also indicate other mechanisms for enabling the energy-saving CHO, which is not limited in the embodiments of the present application.

[0112] It can be understood that the energy-saving CHO configuration information includes the indication information only as an example and not a limitation. The network device can also send the indication information to the terminal device through other signaling, which is not limited in the embodiment of the present application.

[0113] In some embodiments of the present application, the first condition may also be pre-configured to the terminal device, so that the terminal device may also know when which energy-saving configuration is activated to enable energy-saving CHO. For example, the first condition is that the cell DTX configuration is activated. Then the terminal device may enable energy-saving CHO when determining that the cell DTX configuration is activated.

[0114] In addition, it should be noted that Figure 4As shown, the network device can also configure common CHO configuration information for the terminal device. The common CHO configuration information may include CHO trigger conditions and information of at least one candidate cell. When the terminal device does not activate any energy-saving configuration, the terminal device can determine whether to perform cell switching based on the common CHO configuration information.

[0115] S402: The network device sends first configuration information to the terminal device.

[0116] The first configuration information is used to indicate the discontinuous transmission configuration of the cell and / or the discontinuous reception configuration of the cell.

[0117] Optionally, when the first configuration information is used to indicate the cell DTX configuration, it may include at least one of the cell DTX cycle, the duration of the activation period, and the start time interval. When the first configuration information is used to indicate the cell DRX configuration, it may include at least one of the cell DRX cycle, the duration of the activation period, and the start time interval. The start time interval is used to indicate the time interval between the time of activating the cell DTX configuration or activating the cell DRX configuration and the frame start point of the subframe indicating the activation of the cell DTX configuration or activating the cell DRX configuration. Of course, the first configuration information can also be used to indicate the cell DTX configuration and the cell DRX configuration.

[0118] S403: The network device sends a first signaling to the terminal device.

[0119] The first signaling is used to indicate activation of the energy-saving configuration corresponding to the first condition.

[0120] In an embodiment of the present application, the network device may send a signaling for activating the energy saving configuration to the terminal device. For example, the signaling for activating the cell DTX configuration / cell DRX configuration may be as follows: Figure 5 Reference Figure 5 , the signaling can be used to activate and deactivate the cell DTX configuration or cell DRX configuration of multiple cells. For example, 1 bit in block 1 (Block 1) in the signaling is used to indicate whether the cell DTX configuration of cell 1 is activated and deactivated, and 1 bit in block 1 (Block 1) is used to indicate whether the cell DRX configuration of cell 1 is activated and deactivated; 1 bit in block M (Block M) in the signaling is used to indicate whether the cell DTX configuration of cell M is activated and deactivated, and 1 bit in block M (Block M) is used to indicate whether the cell DRX configuration of cell M is activated and deactivated.

[0121] It should be noted that S403 is an optional step. After receiving the first configuration information, the terminal device may activate the energy-saving configuration corresponding to the first configuration information by default without the network device instructing to activate the energy-saving configuration through the first signaling.

[0122] S404: When the terminal device determines that the first condition is met, the terminal device selects a target cell from at least one candidate cell, where the target cell is a cell that meets the CHO triggering condition in the energy-saving CHO configuration information.

[0123] In an optional implementation, when the terminal device receives the first signaling, since the first signaling is used to activate the energy-saving configuration corresponding to the first condition, the terminal device can determine that the first condition is met, that is, the energy-saving configuration corresponding to the first condition has been activated, and the terminal device can enable energy-saving CHO.

[0124] In another optional implementation, the terminal device may determine whether the first condition is met based on whether the energy-saving configuration is activated. For example, assuming that the first condition is that the cell DTX configuration is activated, when the terminal device determines that the current cell DTX configuration is activated, it can be determined that the first condition is met, and the terminal device can enable energy-saving CHO.

[0125] Specifically, the terminal device enables energy-saving CHO as follows: the terminal device measures a measurement event for at least one candidate cell according to the CHO trigger condition in the energy-saving CHO configuration information, and compares the measurement result with the threshold value or bias value corresponding to the measurement event. If the terminal device can determine a target cell that meets the CHO trigger condition from at least one candidate cell, the terminal device can initiate random access to the target cell, thereby switching to the target cell.

[0126] It should be noted that the embodiment of the present application does not limit the execution order between S401 and S402.

[0127] In one case, the terminal device first receives the first configuration information. If the terminal device has not received the energy-saving CHO configuration information at this time, the terminal device can judge whether to perform cell switching based on ordinary CHO or HO until the terminal device receives the energy-saving CHO configuration information. If the terminal device has activated the energy-saving configuration corresponding to the first condition when receiving the energy-saving CHO configuration information, the terminal device can enable the energy-saving CHO; if the terminal device has not activated the energy-saving configuration corresponding to the first condition when receiving the energy-saving CHO configuration information, the terminal device can judge whether to perform cell switching based on ordinary CHO or HO before activating the energy-saving configuration corresponding to the first condition, and can enable the energy-saving CHO after activating the energy-saving configuration corresponding to the first condition.

[0128] In another case, the terminal device first receives the energy-saving CHO configuration information and then receives the first configuration information; or the terminal device receives the energy-saving CHO configuration information and the first configuration information at the same time, then the terminal device enables the energy-saving CHO after determining that the energy-saving configuration corresponding to the first condition is activated.

[0129] Through the communication method provided in the above embodiment, the terminal device can clearly specify when which energy-saving configuration is activated to enable the energy-saving CHO, thereby providing different CHO solutions for when the energy-saving configuration is activated and when the energy-saving configuration is not activated, so as to facilitate the terminal device to quickly switch from the source cell to other cells when the energy-saving technology is not supported, thereby ensuring the energy-saving effect of the source cell.

[0130] Embodiment 2

[0131] Figure 6 A flow chart of a communication method provided in an embodiment of the present application. The communication method can be executed by a network device and a terminal device. Figure 6 , the method comprises the following steps:

[0132] S601: The network device sends energy-saving CHO configuration information to the terminal device.

[0133] The energy-saving CHO configuration information includes CHO trigger conditions and information of at least one candidate cell. The energy-saving CHO configuration information also includes time information, which is used to instruct the terminal device to select a target cell from at least one candidate cell according to the CHO trigger conditions within the timing duration indicated by the time information.

[0134] S602: The network device sends first configuration information to the terminal device.

[0135] The first configuration information is used to indicate the discontinuous transmission configuration of the cell and / or the discontinuous reception configuration of the cell.

[0136] S603: The network device sends a first signaling to the terminal device.

[0137] The first signaling is used to indicate activation of the energy-saving configuration corresponding to the first condition.

[0138] It should be noted that S603 is an optional step. After receiving the first configuration information, the terminal device can activate the energy-saving configuration corresponding to the first configuration information by default, without the network device instructing to activate the energy-saving configuration through the first signaling.

[0139] S604: When the terminal device determines that the first condition is met, the terminal device selects a target cell from at least one candidate cell within the timing duration according to the time information, and the target cell is a cell that meets the CHO trigger condition in the energy-saving CHO configuration information.

[0140] Optionally, the first condition may be at least one of activation of cell discontinuous transmission configuration and activation of cell discontinuous reception configuration.

[0141] In an optional implementation, when the terminal device determines that the first condition is met, it can start a timer according to the time information, select a target cell from at least one candidate cell according to the CHO trigger condition within the timing duration corresponding to the timer, and stop searching for the target cell after the timer times out.

[0142] S605: Within the timing duration, the network device sends a fourth signaling to the terminal device.

[0143] The fourth signaling is used to instruct deactivation of the energy-saving configuration corresponding to the first condition.

[0144] S606: The terminal device stops selecting a target cell from at least one candidate cell after the timing duration indicated by the time information ends; or stops selecting a target cell from the at least one candidate cell after receiving the fourth signaling.

[0145] When the terminal device receives the fourth signaling sent by the network device within the timing period, the terminal device can immediately stop selecting the target cell from at least one candidate cell, or the terminal device can continue to enable energy-saving CHO, and determine the target cell from at least one candidate cell according to the CHO trigger condition in the energy-saving CHO configuration information and perform cell switching until the timing period ends.

[0146] It should be noted that when the terminal device stops selecting a target cell from at least one candidate cell immediately after receiving the fourth signaling, if the terminal device still needs to switch cells, the cell switching may continue according to the normal CHO or HO.

[0147] S607: When the timing duration indicated by the time information ends, the terminal device determines that there is no target cell that meets the CHO trigger condition in at least one candidate cell, and sends a first message to the network device.

[0148] The first message is used to indicate that the terminal device fails to switch cells.

[0149] In an embodiment of the present application, the terminal device selects a target cell from at least one candidate cell within a timing duration. If the terminal still fails to determine the target cell from at least one candidate cell after the timing duration ends, it means that there is no target cell that meets the CHO trigger condition in at least one candidate cell, and the terminal device fails to switch cells. The terminal device can notify the network device of the failure to switch cells through a first message.

[0150] S608: The network device sends a second signaling to the terminal device, where the second signaling is used to instruct the terminal device to switch to the first cell; or the network device sends a third signaling to the terminal device, where the third signaling is used to instruct to update the energy-saving CHO configuration information.

[0151] In an optional implementation, after receiving the first message sent by the terminal device, the network device may send a second signaling to the terminal device to instruct the terminal device to switch to the first cell, so that the terminal device no longer needs to select a target cell from the candidate cells and switch, but can directly switch to the first cell according to the second signaling.

[0152] In another optional implementation, after receiving the first message sent by the terminal device, the network device can determine that the terminal device has failed to determine the target cell within the timing period. This may be because the CHO trigger condition in the energy-saving CHO configuration information has high requirements, which causes the terminal device to be unable to find the target cell that meets the CHO trigger condition. The network device can send a third signaling to the terminal device, and the third signaling is used to indicate the update of the energy-saving CHO configuration information. For example, if the threshold value or bias value corresponding to the measurement event in the CHO trigger condition in the updated energy-saving CHO configuration information is lower, the terminal device can more easily find the target cell that meets the CHO trigger condition according to the updated energy-saving CHO configuration information, and then complete the cell switching.

[0153] Through the communication method provided in the above embodiment, the terminal device can select the target cell from at least one candidate cell according to the CHO trigger condition within the timing duration indicated by the time information in the energy-saving CHO configuration information, thereby limiting the time for the terminal device to search for the target cell. When the terminal device cannot complete the cell switching within the timing duration, it can notify the network device of the cell switching failure. The network device can then adjust the energy-saving CHO configuration in time, or directly instruct the terminal device to switch to the first cell, thereby ensuring the efficiency of the cell switching.

[0154] Embodiment three:

[0155] In some scenarios, when the network device configures cell DTX / cell DRX for the terminal device, it can configure the same cell DTX configuration parameters / cell DRX configuration parameters for multiple cells in the cell group of the terminal device. When the cell DTX configurations / cell DRX configurations of multiple cells are the same, the network device can indicate to the terminal device which cells' cell DTX / cell DRX are activated by default.

[0156] Figure 7 A flow chart of a communication method provided in an embodiment of the present application. The communication method can be executed by a network device and a terminal device. Figure 7, the method comprises the following steps:

[0157] S701: The network device sends first configuration information to the terminal device.

[0158] The first configuration information is used to indicate the discontinuous transmission configuration of the cell and / or the discontinuous reception configuration of the cell.

[0159] In this embodiment, the first configuration information may also include the cell identifier of the cell with the default activated cell discontinuous transmission configuration and / or the default activated cell discontinuous reception configuration; or the first configuration information includes the cell identifier of the cell with the non-default activated cell discontinuous transmission configuration and / or the non-default activated cell discontinuous reception configuration.

[0160] Among them, the cell with default activated cell DTX configuration and / or default activated cell DRX configuration means that the terminal device automatically activates the cell DTX configuration and / or cell DRX configuration when it is in the cell, without the need for the network device to send signaling again to indicate the activation of the cell DTX configuration and / or cell DRX configuration. For the cell with non-default activated cell DTX configuration and / or non-default activated cell DRX configuration, other signaling instructions are required to activate the cell DTX configuration and / or cell DRX configuration later.

[0161] Optionally, the network device may further send a fifth signaling to the terminal device, the fifth signaling including a cell identifier of a cell with a default activated cell discontinuous transmission configuration and / or a default activated cell discontinuous reception configuration; or the fifth signaling including a cell identifier of a cell with a non-default activated cell discontinuous transmission configuration and / or a non-default activated cell discontinuous reception configuration. The fifth signaling may be signaling sent by the network device before sending the first configuration information to the terminal device.

[0162] S702: The terminal device determines a cell with a default activated cell discontinuous transmission configuration and / or a default activated cell discontinuous reception configuration.

[0163] After receiving the first configuration information or the fifth signaling, the terminal device can determine the cell with the default activated cell DTX configuration and / or the default activated cell DRX configuration, and when in the cell with the default activated cell DTX configuration and / or the default activated cell DRX configuration, upon receiving the cell DTX configuration information and / or cell DRX configuration information corresponding to the cell, the terminal device automatically activates the cell DTX configuration and / or cell DRX configuration.

[0164] Through the communication method provided in the above embodiment, the network device can set the cell with the energy-saving configuration activated by default, and indicate to the terminal device the cell with the cell DTX configuration activated by default and / or the cell DRX configuration activated by default, so that the terminal device can clearly know which cells need to activate the energy-saving configuration by default when receiving the energy-saving configuration.

[0165] Based on the same inventive concept as the method embodiment, the present application embodiment provides a communication device, the structure of which can be as follows: Figure 8 As shown, it includes a communication unit 801 and a processing unit 802.

[0166] In one embodiment, the communication device can be used to implement Figure 4 , Figure 6 or Figure 7 In the embodiment of the method executed by the terminal device, the device may be the terminal device itself, or a chip or chipset in the terminal device or a part of the chip used to execute the function of the related method. Among them, the processing unit 802 is used to receive energy-saving condition switching CHO configuration information from the network device through the communication unit 801, and the energy-saving CHO configuration information includes CHO triggering conditions and information of at least one candidate cell; when it is determined that the first condition is met, select a target cell from the at least one candidate cell, and the target cell is a cell that meets the CHO triggering condition; the first condition includes at least one of the following: cell discontinuous transmission configuration activation; or cell discontinuous reception configuration activation.

[0167] Exemplarily, the processing unit 802 is further used to: when it is determined that the first condition is met, before selecting the target cell from the at least one candidate cell, receive indication information from the network device through the communication unit 801, wherein the indication information is used to indicate the first condition.

[0168] Exemplarily, the energy-saving CHO configuration information further includes indication information, where the indication information is used to indicate the first condition.

[0169] Exemplarily, the processing unit 802 is also used to: before determining that the first condition is satisfied and selecting the target cell from the at least one candidate cell, receive first configuration information from the network device through the communication unit 801, wherein the first configuration information is used to indicate the discontinuous transmission configuration of the cell and / or the discontinuous reception configuration of the cell.

[0170] Exemplarily, the processing unit 802 is specifically used to: receive a first signaling from the network device through the communication unit 801, the first signaling is used to indicate activation of the energy-saving configuration corresponding to the first condition, the energy-saving configuration corresponding to the first condition is the discontinuous transmission configuration of the cell, and / or the discontinuous reception configuration of the cell.

[0171] Exemplarily, the CHO triggering condition includes information of multiple measurement events when the discontinuous transmission configuration of the cell is activated, and information of multiple measurement events when the discontinuous reception configuration of the cell is activated.

[0172] Exemplarily, the information of the measurement event includes at least one of a threshold value, a bias value, a time delay, and an amplitude delay.

[0173] Exemplarily, the energy-saving CHO configuration information further includes time information; the processing unit 802 is specifically configured to: select a target cell from the at least one candidate cell within a timing duration indicated by the time information.

[0174] Exemplarily, the processing unit 802 is also used to: when the timing duration indicated by the time information ends, determine that there is no target cell that meets the CHO trigger condition in the at least one candidate cell, and send a first message to the network device through the communication unit 801, wherein the first message is used to indicate that the terminal device has failed to switch cells.

[0175] Exemplarily, the processing unit 802 is further used to: after sending a first message to the network device through the communication unit 801, receive a second signaling from the network device through the communication unit 801, wherein the second signaling is used to instruct the terminal device to switch to the first cell.

[0176] Exemplarily, the processing unit 802 is further configured to: after sending the first message to the network device through the communication unit 801, receive a third signaling from the network device through the communication unit 801, wherein the third signaling is used to instruct to update the energy-saving CHO configuration information.

[0177] Exemplarily, the processing unit 802 is also used to: receive a fourth signaling from the network device through the communication unit 801 within the timing duration indicated by the time information, the fourth signaling being used to indicate deactivation of the energy-saving configuration corresponding to the first condition; the energy-saving configuration corresponding to the first condition is the discontinuous transmission configuration of the cell, and / or the discontinuous reception configuration of the cell; stop selecting the target cell from the at least one candidate cell after the timing duration indicated by the time information ends; or stop selecting the target cell from the at least one candidate cell after receiving the fourth signaling.

[0178] Exemplarily, the first configuration information includes the cell identifier of the cell that activates the cell's discontinuous transmission configuration by default and / or activates the cell's discontinuous reception configuration by default; or the first configuration information includes the cell identifier of the cell that activates the cell's discontinuous transmission configuration by non-default and / or activates the cell's discontinuous reception configuration by non-default.

[0179] Exemplarily, the processing unit 802 is also used to: before receiving the first configuration information from the network device through the communication unit 801, receive the fifth signaling from the network device through the communication unit 801, the fifth signaling including the cell identifier of the cell that activates the cell discontinuous transmission configuration by default and / or activates the cell discontinuous reception configuration by default; or the fifth signaling includes the cell identifier of the cell that activates the cell discontinuous transmission configuration and / or activates the cell discontinuous reception configuration by non-default.

[0180] In one embodiment, the communication device can be used to implement Figure 4 , Figure 6 or Figure 7 In the embodiment of the method executed by the network device, the device may be the network device itself, or a chip or chipset in the network device or a part of the chip used to execute the function of the related method. Wherein, the processing unit 802 is used to send energy-saving condition switching CHO configuration information to the terminal device through the communication unit 801, and the energy-saving CHO configuration information includes a CHO trigger condition, information of at least one candidate cell and indication information, and the indication information is used to indicate a first condition; wherein the first condition is a condition for starting the terminal device to select a target cell from the at least one candidate cell according to the CHO trigger condition; the first condition includes at least one of the following: cell discontinuous transmission configuration activation; or cell discontinuous reception configuration activation.

[0181] Exemplarily, the processing unit 802 is further used to: send first configuration information to the terminal device through the communication unit 801, where the first configuration information is used to indicate the cell discontinuous transmission configuration and / or the cell discontinuous reception configuration.

[0182] Exemplarily, the processing unit 802 is also used to: send a first signaling to the terminal device through the communication unit 801, the first signaling is used to indicate activation of the energy-saving configuration corresponding to the first condition, the energy-saving configuration corresponding to the first condition is the discontinuous transmission configuration of the cell, and / or the discontinuous reception configuration of the cell.

[0183] Exemplarily, the CHO triggering condition includes information of multiple measurement events when the discontinuous transmission configuration of the cell is activated, and information of multiple measurement events when the discontinuous reception configuration of the cell is activated.

[0184] Exemplarily, the information of the measurement event includes at least one of a threshold value, a bias value, a time delay, and an amplitude delay.

[0185] Exemplarily, the energy-saving CHO configuration information further includes time information, and the time information is used to instruct the terminal device to select the target cell from the at least one candidate cell according to the CHO trigger condition within a timing duration indicated by the time information.

[0186] Exemplarily, the processing unit 802 is further used to: receive a first message from the terminal device through the communication unit 801, where the first message is used to indicate that the terminal device fails to switch cells.

[0187] Exemplarily, the processing unit 802 is further used to: after receiving a first message from the terminal device through the communication unit 801, send a second signaling to the terminal device through the communication unit 801, wherein the second signaling is used to instruct the terminal device to switch to the first cell.

[0188] Exemplarily, the processing unit 802 is further used for: after receiving the first message from the terminal device through the communication unit 801, sending a third signaling to the terminal device through the communication unit 801, wherein the third signaling is used to instruct to update the energy-saving CHO configuration information.

[0189] Exemplarily, the processing unit 802 is also used to: send a fourth signaling to the terminal device through the communication unit 801, and the fourth signaling is used to indicate deactivation of the energy-saving configuration corresponding to the first condition; the energy-saving configuration corresponding to the first condition is the discontinuous transmission configuration of the cell, and / or the discontinuous reception configuration of the cell.

[0190] Exemplarily, the first configuration information includes the cell identifier of the cell that activates the cell's discontinuous transmission configuration by default and / or activates the cell's discontinuous reception configuration by default; or the first configuration information includes the cell identifier of the cell that activates the cell's discontinuous transmission configuration by non-default and / or activates the cell's discontinuous reception configuration by non-default.

[0191] Exemplarily, the processing unit 802 is also used to: before sending the first configuration information to the terminal device through the communication unit 801, send a fifth signaling to the terminal device through the communication unit 801, the fifth signaling including the cell identifier of the cell that activates the cell discontinuous transmission configuration by default and / or activates the cell discontinuous reception configuration by default; or the fifth signaling includes the cell identifier of the cell that activates the cell discontinuous transmission configuration and / or activates the cell discontinuous reception configuration by non-default.

[0192] The division of modules in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present application may be integrated into a processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. It is understood that the functions or implementations of each module in the embodiments of the present application may further refer to the relevant description of the method embodiment.

[0193] In one possible approach, the communication device may be as follows Fig. 9 As shown, the device can be a communication device or a chip in a communication device, wherein the communication device can be a terminal device in the above embodiment or a network device in the above embodiment. The device includes a processor 901 and a communication interface 902, and can also include a memory 903. Among them, the processing unit 802 can be the processor 901. The communication unit 801 can be the communication interface 902. Optionally, the processor 901 and the memory 903 can also be integrated together.

[0194] The processor 901 may be a CPU, or a digital processing unit, etc. The communication interface 902 may be a transceiver, or an interface circuit such as a transceiver circuit, or a transceiver chip, etc. The device further includes: a memory 903 for storing programs executed by the processor 901. The memory 903 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as a random-access memory (RAM). The memory 903 is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0195] The processor 901 is used to execute the program code stored in the memory 903, specifically to execute the actions of the processing unit 802, which will not be described in detail in this application. The communication interface 902 is specifically used to execute the actions of the communication unit 801, which will not be described in detail in this application.

[0196] The specific connection medium between the communication interface 902, the processor 901 and the memory 903 is not limited in the embodiment of the present application. Fig. 9 In the embodiment, the memory 903, the processor 901 and the communication interface 902 are connected via a bus 904. Fig. 9The connections between other components are shown in bold lines, which are only for illustration and are not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig. 9 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0197] An embodiment of the present invention further provides a computer-readable storage medium for storing computer software instructions required to be executed by the above-mentioned processor, which includes a program required to be executed by the above-mentioned processor.

[0198] The present application also provides a communication system, including a Figure 4 , Figure 6 or Figure 7 In the embodiment of the terminal device function communication device and for realizing Figure 4 , Figure 6 or Figure 7 The communication device of the network device function in the embodiment.

[0199] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0200] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0201] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1A function specified in one or more boxes.

[0202] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0203] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: The method comprises: Receiving energy-saving condition switching CHO configuration information from a network device, wherein the energy-saving CHO configuration information includes a CHO triggering condition and information of at least one candidate cell; When it is determined that the first condition is met, selecting a target cell from the at least one candidate cell, the target cell being a cell that meets the CHO triggering condition; The first condition includes at least one of the following: The cell discontinuous transmission configuration is activated; or The cell discontinuous reception configuration is activated.

2. The method according to claim 1, characterized in that When the first condition is determined to be satisfied, before selecting a target cell from the at least one candidate cell, the method further includes: Receive indication information from the network device, where the indication information is used to indicate the first condition.

3. The method according to claim 1 or 2, characterized in that Before determining that the first condition is satisfied and selecting a target cell from the at least one candidate cell, the method further includes: First configuration information is received from the network device, where the first configuration information is used to indicate the discontinuous transmission configuration of the cell and / or the discontinuous reception configuration of the cell.

4. The method according to claim 3, characterized in that The determining that the first condition is satisfied includes: A first signaling is received from the network device, where the first signaling is used to indicate activation of an energy-saving configuration corresponding to the first condition, where the energy-saving configuration corresponding to the first condition is a discontinuous transmission configuration of the cell and / or a discontinuous reception configuration of the cell.

5. The method according to any one of claims 1 to 4, characterized in that: The CHO triggering condition includes information of multiple measurement events when the discontinuous transmission configuration of the cell is activated, and information of multiple measurement events when the discontinuous reception configuration of the cell is activated.

6. The method according to claim 5, characterized in that The information of the measurement event includes at least one of a threshold value, an offset value, a time delay, and an amplitude delay.

7. The method according to any one of claims 1 to 6, characterized in that: The energy-saving CHO configuration information also includes time information; The selecting a target cell from the at least one candidate cell comprises: Within the timing duration indicated by the time information, a target cell is selected from the at least one candidate cell.

8. The method according to claim 7, characterized in that The method further comprises: When the timing duration indicated by the time information ends, it is determined that there is no target cell that meets the CHO trigger condition in the at least one candidate cell, and a first message is sent to the network device, where the first message is used to indicate that the terminal device has failed to switch cells.

9. The method according to claim 8, characterized in that After sending the first message to the network device, the method further includes: Receive a second signaling from the network device, where the second signaling is used to instruct the terminal device to switch to the first cell.

10. The method according to claim 8, characterized in that After sending the first message to the network device, the method further includes: A third signaling is received from the network device, where the third signaling is used to instruct to update the energy-saving CHO configuration information.

11. The method according to any one of claims 6 to 10, characterized in that: The method further comprises: receiving, within the timing duration indicated by the time information, a fourth signaling from the network device, the fourth signaling being used to instruct deactivation of an energy-saving configuration corresponding to the first condition; the energy-saving configuration corresponding to the first condition being the cell discontinuous transmission configuration and / or the cell discontinuous reception configuration; After the timing duration indicated by the time information ends, stop selecting a target cell from the at least one candidate cell; or After receiving the fourth signaling, stop selecting a target cell from the at least one candidate cell.

12. The method according to claim 3 or 4, characterized in that: The first configuration information includes a cell identifier of a cell in which the cell discontinuous transmission configuration and / or the cell discontinuous reception configuration is activated by default; or The first configuration information includes a cell identifier of a cell for which the cell discontinuous transmission configuration is not activated by default and / or the cell discontinuous reception configuration is not activated by default.

13. The method according to claim 3 or 4, characterized in that Before receiving the first configuration information from the network device, the method further includes: receiving a fifth signaling from the network device, the fifth signaling including a cell identifier of a cell for which the discontinuous transmission configuration of the cell is activated by default and / or the discontinuous reception configuration of the cell is activated by default; or The fifth signaling includes a cell identifier of a cell for which the cell discontinuous transmission configuration is not activated by default and / or the cell discontinuous reception configuration is not activated by default.

14. A communication method, characterized in that: The method comprises: Sending energy-saving condition switching CHO configuration information to the terminal device, where the energy-saving CHO configuration information includes a CHO triggering condition, information of at least one candidate cell, and indication information, where the indication information is used to indicate the first condition; The first condition is a condition for starting the terminal device to select a target cell from the at least one candidate cell according to the CHO trigger condition; the first condition includes at least one of the following: The cell discontinuous transmission configuration is activated; or The cell discontinuous reception configuration is activated.

15. The method according to claim 14, characterized in that The method further comprises: Sending first configuration information to the terminal device, where the first configuration information is used to indicate a cell discontinuous transmission configuration and / or a cell discontinuous reception configuration.

16. The method according to claim 15, characterized in that The method further comprises: A first signaling is sent to the terminal device, where the first signaling is used to indicate activation of an energy-saving configuration corresponding to the first condition, where the energy-saving configuration corresponding to the first condition is a discontinuous transmission configuration of the cell and / or a discontinuous reception configuration of the cell.

17. The method according to any one of claims 14 to 16, characterized in that: The CHO triggering condition includes information of multiple measurement events when the discontinuous transmission configuration of the cell is activated, and information of multiple measurement events when the discontinuous reception configuration of the cell is activated.

18. The method according to claim 17, characterized in that The information of the measurement event includes at least one of a threshold value, an offset value, a time delay, and an amplitude delay.

19. The method according to any one of claims 14 to 18, characterized in that: The energy-saving CHO configuration information further includes time information, where the time information is used to instruct the terminal device to select the target cell from the at least one candidate cell according to the CHO trigger condition within a timing duration indicated by the time information.

20. The method of claim 19, wherein: The method further comprises: A first message is received from the terminal device, where the first message is used to indicate that the terminal device fails to switch cells.

21. The method of claim 20, wherein: After receiving the first message from the terminal device, the method further includes: A second signaling is sent to the terminal device, where the second signaling is used to instruct the terminal device to switch to the first cell.

22. The method of claim 20, wherein: After receiving the first message from the terminal device, the method further includes: A third signaling is sent to the terminal device, where the third signaling is used to instruct to update the energy-saving CHO configuration information.

23. The method according to any one of claims 19 to 22, characterized in that: The method further comprises: A fourth signaling is sent to the terminal device, where the fourth signaling is used to indicate deactivation of the energy-saving configuration corresponding to the first condition; the energy-saving configuration corresponding to the first condition is the discontinuous transmission configuration of the cell and / or the discontinuous reception configuration of the cell.

24. The method according to claim 15 or 16, characterized in that The first configuration information includes a cell identifier of a cell in which the cell discontinuous transmission configuration and / or the cell discontinuous reception configuration is activated by default; or The first configuration information includes a cell identifier of a cell for which the cell discontinuous transmission configuration is not activated by default and / or the cell discontinuous reception configuration is not activated by default.

25. The method according to claim 15 or 16, characterized in that Before sending the first configuration information to the terminal device, the method further includes: Sending a fifth signaling to the terminal device, where the fifth signaling includes a cell identifier of a cell in which the discontinuous transmission configuration of the cell is activated by default and / or the discontinuous reception configuration of the cell is activated by default; or The fifth signaling includes a cell identifier of a cell for which the cell discontinuous transmission configuration is not activated by default and / or the cell discontinuous reception configuration is not activated by default.

26. A communication device, characterized in that: The method comprises a unit or module for executing the method according to any one of claims 1 to 13, or comprises a unit or module for executing the method according to any one of claims 14 to 25.

27. A communication device, characterized in that: The apparatus comprises a processor and a memory, the processor being coupled to the memory; The memory is used to store programs or instructions; The processor is used to call the program or instruction to enable the communication device to execute the method according to any one of claims 1-13, or execute the method according to any one of claims 14-25.

28. A computer-readable storage medium, characterized in that: The storage medium stores a computer program or an instruction. When the computer program or the instruction is executed by the communication device, the method according to any one of claims 1 to 13 or the method according to any one of claims 14 to 25 is implemented.

29. A computer program product, characterized in that The computer program product comprises a computer program or instructions, and when the computer program or instructions are executed by a communication device, the method according to any one of claims 1 to 13, or the method according to any one of claims 14 to 25 is executed.

30. A chip, characterized in that: The chip is used to read a computer program stored in a memory to execute the method of any one of claims 1-13, or to execute the method of any one of claims 14-25.

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