Cell selection method, cell reselection method, cell reselection measurement method, communication method, and related product

Abstract

Embodiments of the present application provide a cell selection method, a cell reselection method, a cell reselection measurement method, a communication method, and a related product. The cell selection method comprises: a terminal device performs cell search on at least one candidate cell; and then the terminal device selects a first cell from among the at least one candidate cell on the basis of frequency point priority. The first cell satisfies a first condition, and the first condition comprises: a cell selection receive level value of the first cell and a cell selection quality value of the first cell are both greater than 0. In this example, by selecting the first cell on the basis of priority, a UE has a higher probability of camping on a cell supporting low-power-consumption characteristics as soon as possible, which is beneficial for a UE having power-saving capability or power-saving requirements to achieve power saving.

Description

Cell selection, reselection, reselection measurement, communication methods and related products

[0001] This application claims priority to Chinese Patent Application No. 202411219565.9, filed with the China National Intellectual Property Administration on August 31, 2024, entitled “Cell Selection, Reselection, Reselection Measurement, Communication Method and Related Products”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to a cell selection, cell reselection, cell reselection measurement, communication method and related products. Background Technology

[0003] To reduce the power consumption of terminal devices, a low-power wake-up signal (LP-WUS) has been introduced. The terminal device wakes up the high-power receiver only when LP-WUS is detected; otherwise, the high-power receiver can remain in sleep mode, thus reducing the terminal device's power consumption. However, during cell selection or reselection, the terminal device may select a cell that does not support LP-WUS, preventing it from entering low-power mode and hindering energy saving. Summary of the Invention

[0004] This application discloses a cell selection, cell reselection, cell reselection measurement, communication method, and related products, which can reduce the power consumption of terminal devices.

[0005] Firstly, embodiments of this application provide a cell selection method. This method can be applied to the terminal side, such as a terminal or a communication / processing module within the terminal, or circuits or chips responsible for communication functions within the terminal (e.g., modem chips, also known as baseband chips, or system-on-chip (SoC) chips or system-in-package (SIP) chips containing a modem core), or circuits or chips responsible for processing functions within the terminal (e.g., graphics processing unit (GPU)). Taking the application of this method to a terminal as an example, in this method, the terminal device performs cell search on at least one candidate cell. Furthermore, the terminal device selects a first cell from the at least one candidate cell based on frequency priority. The first cell satisfies a first condition, which includes: the cell selection received level value and the cell selection quality value of the first cell are both greater than 0.

[0006] The cell selection method provided in this example selects a first cell from at least one candidate cell based on frequency priority. The first cell has a cell selection receive level value and a cell selection quality value both greater than 0. Selecting the first cell based on frequency priority increases the probability that the UE will camp on a cell supporting low-power characteristics as quickly as possible, which is beneficial for UEs with energy-saving capabilities or energy-saving needs to achieve energy savings.

[0007] In one possible implementation, the first cell is the cell with the highest frequency priority among at least one candidate cell that meets the first condition. This allows the UE to have a greater probability of camping on a cell that supports low-power features as soon as possible.

[0008] In one possible implementation, the first cell is the cell with the highest frequency priority among at least one candidate cell.

[0009] In another possible implementation, the frequency priority of the first cell is higher than or equal to the highest frequency priority that the network device can configure. In this example, the terminal device can increase the frequency priority of the cell it wishes to camp on, thus further increasing the probability that the UE will camp on a cell that supports low-power features.

[0010] In another possible implementation, the first cell is the cell with the highest frequency priority among at least one candidate cell, and the frequency priority of the first cell is higher than or equal to the highest frequency priority that the network device can configure.

[0011] In one possible implementation, the first cell supports low-power characteristics.

[0012] In one possible implementation, the frequency priority of cells that do not support low-power features among the at least one candidate cell is configured by the network device. In this example, the terminal device can increase the frequency priority of cells that support low-power features, while the frequency priority of cells that do not support low-power features is configured by the network device, thus further increasing the probability that the UE will camp on a cell that supports low-power features.

[0013] In one possible implementation, the terminal device starts a first timer. Then, before the first timer expires, it selects a first cell from at least one candidate cell based on frequency priority. This example implements a fallback mechanism, preventing the terminal device from indefinitely selecting a cell based on frequency priority. If it cannot camp on a cell that supports low power for an extended period, the UE can select a cell that meets the first condition but does not support low power, camping on that cell as early as possible and reducing the terminal's cell search time.

[0014] In one possible implementation, after the first timer expires, the terminal device further performs one or more of the following processes: selects a first cell from at least one candidate cell without considering frequency priority; or performs a cell search on at least one candidate cell based on a first condition; the terminal device enters a state where it camps on any cell; or the terminal device remains in a state where any cell is selected; or the terminal device camps on any suitable cell on a preset RAT. In this example, the terminal can enter a definite state even if no first cell meeting the conditions is found. Furthermore, by designing different UE states, greater flexibility is given to the UE.

[0015] In one possible implementation, the terminal device receives at least one indication message indicating at least one of the following: the duration of a first timer, the start rule of the first timer, the start time of the first timer, and the end time of the first timer. The terminal device then performs a cell search based on this indication message.

[0016] In one possible implementation, the terminal device supports low-power characteristics.

[0017] In one possible implementation, the terminal device enables a low-power mechanism. When the number of cell reselections by the terminal device within a first time interval is less than a cell reselection threshold, the terminal device selects the first cell from at least one candidate cell based on frequency priority. In this example, when the number of cell reselections by the terminal device is low, the cells supporting low-power characteristics have better quality, and the terminal device can enable low-power characteristics to achieve terminal energy saving.

[0018] In another possible implementation, the terminal device enables a low-power mechanism. When the number of cell reselections by the terminal device within a first time interval exceeds a cell reselection threshold, the terminal device does not select the first cell from at least one candidate cell based on frequency priority. In this example, when the terminal device performs a large number of cell reselections, the quality of cells supporting low-power characteristics is poor. To avoid the high power consumption caused by the terminal device's high-power receiver (main receiver) frequently waking up to perform cell measurements (such as same-frequency or different-frequency measurements), the terminal device no longer performs cell reselection or cell selection based on the frequency priority of candidate cells. The terminal can disable the low-power mechanism, reducing the additional power consumption caused by switching between different receivers.

[0019] In another possible implementation, the terminal device enables a low-power mechanism. When the number of cell reselections by the terminal device within a first time interval exceeds a cell reselection threshold, the terminal device selects the first cell from at least one candidate cell based on the aforementioned first condition. In this example, when the terminal device performs a large number of cell reselections, the quality of cells supporting low-power characteristics is poor. This avoids the high power consumption caused by the terminal device's high-power receiver (main receiver) frequently waking up to perform cell measurements (such as same-frequency or different-frequency measurements). The terminal device is not forced to select a cell that supports low-power characteristics. Therefore, when selecting the first cell, only the first condition needs to be met. Cell reselection or cell selection based on the frequency priority of candidate cells is no longer required. The terminal can disable the low-power mechanism, reducing the additional power consumption caused by switching between different receivers.

[0020] Secondly, this application provides a cell reselection method. This method can be applied to the terminal side, such as the terminal or the communication module / processing module in the terminal, or the circuit or chip responsible for communication functions in the terminal (such as a modem chip, also known as a baseband chip, or a system-on-a-chip (SoC) chip or system-in-package (SIP) chip containing a modem core), or the circuit or chip responsible for processing functions in the terminal (such as a graphics processing unit (GPU). Taking the application of this method to a terminal as an example, in this method, the terminal device determines at least one candidate cell, which includes a first cell. The frequency priority of the first cell is higher than that of the serving cell. Furthermore, when the first cell meets a second condition, the terminal device reselects from the serving cell to the first cell, which includes one or more of the following: (1) the first parameter of the first cell is greater than the cell selection quality value of the first cell, and the first parameter of the first cell is greater than the cell selection quality value threshold used when performing the first priority RAT / frequency reselection. (2) The second parameter of the first cell is greater than the cell selection receive level value of the first cell, and the second parameter of the first cell is greater than the cell selection receive level threshold value used when performing first priority RAT / frequency reselection. (3) The cell selection quality value of the first cell is greater than the third parameter of the first cell, and the third parameter of the first cell is less than the cell selection quality value threshold value used when performing first priority RAT / frequency reselection. (4) The cell selection receive level value of the first cell is greater than the fourth parameter of the first cell, and the fourth parameter of the first cell is less than the cell selection receive level threshold value used when performing first priority RAT / frequency reselection.

[0021] In this embodiment of the application, based on the second condition described above, by adjusting the cell selection quality value or the cell selection reception level value of the first cell, or by adjusting the cell selection quality value threshold used by the first cell when performing first priority RAT / frequency point reselection, or by adjusting the cell selection reception level value threshold used by the first cell when performing first priority RAT / frequency point reselection, the UE is more likely to reselect to a cell that supports low power mode, which is beneficial for UE energy saving.

[0022] In one possible implementation, the first parameter is the sum of the cell selection quality value of the first cell and a first offset value, which is predefined or determined based on network device instructions.

[0023] In one possible implementation, the second parameter is the sum of the cell selection receive level of the first cell and a second offset value, which is predefined or determined based on network device instructions.

[0024] In one possible implementation, the third parameter is the difference between the cell selection quality value threshold used when performing first priority RAT / frequency reselection and the third offset value, which is predefined or determined based on network device instructions.

[0025] In one possible implementation, the fourth parameter is the difference between the cell selection receive level threshold used when performing first priority RAT / frequency reselection and the fourth offset value, which is predefined or determined based on network device indication.

[0026] In one possible implementation, the first offset value, the second offset value, the third offset value, and the fourth offset value are all greater than 0.

[0027] This example increases the cell selection quality value or cell selection reception level value of the first cell, or decreases the cell selection quality value threshold used when performing first priority RAT / frequency point reselection, or decreases the cell selection reception level value threshold used when performing first priority RAT / frequency point reselection, making it more likely that the UE will reselect to a cell that supports low power mode, which is beneficial for UE energy saving.

[0028] In one possible implementation, during the first time interval, the first cell satisfies the second condition, and the terminal device resides in the serving cell for a period exceeding a preset duration.

[0029] In one possible implementation, the first cell satisfies (1) or (3) of the second condition, and the terminal device also receives first information indicating the cell selection quality value threshold used by the terminal device in the serving cell when performing a second priority RAT / frequency reselection.

[0030] In one possible implementation, before the terminal device reselects from the serving cell to the first cell, the terminal device performs cell measurement; wherein, if the serving cell meets a third condition, in-frequency measurement is not performed. This third condition includes: the serving cell's fifth parameter is greater than the serving cell's cell selection quality value, the serving cell's fifth parameter is greater than a threshold value for in-frequency measurement of the cell selection quality value, and the serving cell's sixth parameter is greater than the serving cell's cell selection receive level value, and the serving cell's sixth parameter is greater than a threshold value for in-frequency measurement of the cell selection receive level value. Alternatively, the serving cell's cell selection quality value is greater than the serving cell's seventh parameter, the serving cell's seventh parameter is less than a threshold value for in-frequency measurement of the cell selection quality value, and the serving cell's cell selection receive level value is greater than the serving cell's eighth parameter, and the serving cell's eighth parameter is less than a threshold value for in-frequency measurement of the cell selection receive level value.

[0031] In this application embodiment, by increasing the cell selection quality value or cell selection reception level value of the serving cell, it is easier for it to exceed the threshold of the existing protocol adaptation MR; or by decreasing the threshold of the cell selection reception level value of the same frequency measurement, the UE can make more accurate judgments on the cell selection quality value or cell selection reception level value of the serving cell relative to the threshold, so that the UE can make better decisions on whether to perform same frequency measurement, reduce invalid cell measurements, save energy for the UE, and also help in subsequent decisions on whether to perform cell reselection.

[0032] In one possible implementation, the terminal device performs co-frequency measurement when the serving cell meets a fourth condition, which includes one or more of the following: the fifth parameter of the serving cell is greater than the cell selection quality value of the serving cell, and the fifth parameter of the serving cell is less than or equal to the cell selection quality value threshold of the co-frequency measurement; the sixth parameter of the serving cell is greater than the cell selection reception level value of the serving cell, and the sixth parameter of the serving cell is less than or equal to the cell selection reception level value threshold of the co-frequency measurement; the cell selection quality value of the serving cell is less than or equal to the seventh parameter of the serving cell, and the seventh parameter of the serving cell is less than the cell selection quality value threshold of the co-frequency measurement; the cell selection reception level value of the serving cell is less than or equal to the eighth parameter of the serving cell, and the eighth parameter is less than the cell selection reception level value threshold of the co-frequency measurement.

[0033] In this application embodiment, by increasing the cell selection quality value or cell selection reception level value of the serving cell, it is easier for it to exceed the threshold of the existing protocol adaptation MR; or by decreasing the threshold of the cell selection reception level value of the co-frequency measurement, the UE can make more accurate judgments on the cell selection quality value or cell selection reception level value of the serving cell relative to the threshold. This allows the UE to make better decisions on whether to perform co-frequency measurement, avoids the UE from always being in a cell with poor cell quality, is beneficial for UE energy saving, and also helps in subsequent decisions on whether to perform cell reselection.

[0034] In one possible implementation, the fifth parameter of the serving cell is the sum of the cell selection quality value of the serving cell and a fifth offset value, which is predefined or determined based on network device instructions.

[0035] In one possible implementation, the sixth parameter of the serving cell is the sum of the cell selection received level value of the serving cell and the sixth offset value, which is predefined or determined based on network device indication.

[0036] In one possible implementation, the seventh parameter of the serving cell is the difference between a cell selection quality value threshold measured in the same frequency and a seventh offset value, which is predefined or determined based on network device instructions.

[0037] In one possible implementation, the eighth parameter of the serving cell is the difference between a cell selection received level threshold measured in the same frequency and an eighth offset value, which is predefined or determined based on network device indications.

[0038] In one possible implementation, the fifth, sixth, seventh, and eighth offset values ​​are all greater than 0.

[0039] Thirdly, embodiments of this application provide a cell reselection measurement method. This method can be applied to the terminal side, such as the terminal or its communication / processing module, or circuits or chips responsible for communication functions in the terminal (e.g., modem chips, also known as baseband chips, or system-on-a-chip (SoC) chips or system-in-package (SIP) chips containing modem cores), or circuits or chips responsible for processing functions in the terminal (e.g., graphics processing unit (GPU)). Taking the application of this method to a terminal as an example, in this method, the terminal device performs cell measurement; wherein, when the serving cell meets a third condition, co-frequency measurement is not performed. The third condition includes: the fifth parameter of the serving cell is greater than the serving cell's cell selection quality value, the fifth parameter of the serving cell is greater than the cell selection quality value threshold for co-frequency measurement, and the sixth parameter of the serving cell is greater than the serving cell's cell selection receive level value, and the sixth parameter of the serving cell is greater than the cell selection receive level value threshold for co-frequency measurement. Alternatively, the serving cell's cell selection quality value is greater than the serving cell's seventh parameter, the serving cell's seventh parameter is less than the cell selection quality value threshold measured in the same frequency, and the serving cell's cell selection received level value is greater than the serving cell's eighth parameter, the serving cell's eighth parameter is less than the cell selection received level value threshold measured in the same frequency.

[0040] In this application embodiment, by increasing the cell selection quality value or cell selection reception level value of the serving cell, it is easier for it to exceed the threshold of the existing protocol adaptation MR; or by decreasing the threshold of the cell selection reception level value of the co-frequency measurement, the judgment of the cell selection quality value or cell selection reception level value of the serving cell relative to the threshold is more accurate, so that the UE can make a better decision on whether to perform co-frequency measurement, reduce invalid cell measurements, benefit UE energy saving, and also help in the subsequent decision on whether to perform cell reselection.

[0041] In one possible implementation, when the serving cell meets a fourth condition, the terminal device performs a co-frequency measurement, the fourth condition including one or more of the following: the fifth parameter of the serving cell is greater than the cell selection quality value of the serving cell, and the fifth parameter of the serving cell is less than or equal to the cell selection quality value threshold of the co-frequency measurement; the sixth parameter of the serving cell is greater than the cell selection reception level value of the serving cell, and the sixth parameter of the serving cell is less than or equal to the cell selection reception level value threshold of the co-frequency measurement; the cell selection quality value of the serving cell is less than or equal to the seventh parameter of the serving cell, and the seventh parameter of the serving cell is less than the cell selection quality value threshold of the co-frequency measurement; the cell selection reception level value of the serving cell is less than or equal to the eighth parameter of the serving cell, and the eighth parameter is less than the cell selection reception level value threshold of the co-frequency measurement.

[0042] In one possible implementation, the fifth parameter of the serving cell is the sum of the cell selection quality value of the serving cell and a fifth offset value, which is predefined or determined based on network device instructions.

[0043] In one possible implementation, the sixth parameter of the serving cell is the sum of the cell selection received level value of the serving cell and the sixth offset value, which is predefined or determined based on network device indication.

[0044] In one possible implementation, the seventh parameter of the serving cell is the difference between a cell selection quality value threshold measured in the same frequency and a seventh offset value, which is predefined or determined based on network device instructions.

[0045] In one possible implementation, the eighth parameter of the serving cell is the difference between a cell selection received level threshold measured in the same frequency and an eighth offset value, which is predefined or determined based on network device indications.

[0046] In one possible implementation, the fifth, sixth, seventh, and eighth offset values ​​are all greater than 0.

[0047] Fourthly, embodiments of this application provide a method for measuring cell reselection. This method can be applied to the terminal side, such as the terminal or the communication / processing module in the terminal, or the circuits or chips in the terminal responsible for communication functions (such as modem chips, also known as baseband chips, or system-on-a-chip (SoC) chips or system-in-package (SIP) chips containing modem cores), or the circuits or chips in the terminal responsible for processing functions (such as graphics processing units (GPUs)). Taking the application of this method to a terminal as an example, in this method, the terminal device performs cell measurement; wherein, when the serving cell meets the fourth condition, the terminal device performs co-frequency measurement, the fourth condition including one or more of the following: the fifth parameter of the serving cell is greater than the cell selection quality value of the serving cell, and the fifth parameter of the serving cell is less than or equal to the cell selection quality value threshold of the co-frequency measurement; the sixth parameter of the serving cell is greater than the cell selection reception level value of the serving cell, and the sixth parameter of the serving cell is less than or equal to the cell selection reception level value threshold of the co-frequency measurement; the cell selection quality value of the serving cell is less than or equal to the seventh parameter of the serving cell, and the seventh parameter of the serving cell is less than the cell selection quality value threshold of the co-frequency measurement; the cell selection reception level value of the serving cell is less than or equal to the eighth parameter of the serving cell, and the eighth parameter is less than the cell selection reception level value threshold of the co-frequency measurement.

[0048] In this application embodiment, by increasing the cell selection quality value or cell selection reception level value of the serving cell, it is easier for it to exceed the threshold of the existing protocol adaptation MR; or by decreasing the threshold of the cell selection reception level value of the co-frequency measurement, the UE can make more accurate judgments on the cell selection quality value or cell selection reception level value of the serving cell relative to the threshold. This allows the UE to make better decisions on whether to perform co-frequency measurement, avoids the UE from always being in a cell with poor cell quality, is beneficial for UE energy saving, and also helps in subsequent decisions on whether to perform cell reselection.

[0049] In one possible implementation, when the serving cell meets a third condition, no co-frequency measurement is performed. The third condition includes: the serving cell's fifth parameter is greater than its cell selection quality value; the serving cell's fifth parameter is greater than a threshold value for co-frequency measurement of cell selection quality; and the serving cell's sixth parameter is greater than its cell selection receive level value; the serving cell's sixth parameter is greater than a threshold value for co-frequency measurement of cell selection receive level. Alternatively, the serving cell's cell selection quality value is greater than its seventh parameter; the serving cell's seventh parameter is less than a threshold value for co-frequency measurement of cell selection quality; and the serving cell's cell selection receive level value is greater than its eighth parameter; the serving cell's eighth parameter is less than a threshold value for co-frequency measurement of cell selection receive level.

[0050] In this embodiment, the serving cell's cell selection quality value or cell selection reception level value is increased to make it more likely to exceed the threshold for existing protocol-adapted MR; or the threshold for the cell selection reception level value measured in the same frequency is decreased to make it more likely for the serving cell's cell selection quality value or cell selection reception level value to exceed the threshold. In this way, the UE can perform better cell reselection during low-power mode operation, allowing the UE to reselect to a more suitable cell, which is beneficial for UE energy saving.

[0051] For other implementations of this example, please refer to the documentation in the third section, which will not be elaborated here.

[0052] Fifthly, embodiments of this application provide a communication method. This method can be applied to the terminal side, such as a terminal or a communication / processing module within the terminal, or circuits or chips in the terminal responsible for communication functions (such as a modem chip, also known as a baseband chip, or a system-on-a-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip), or circuits or chips in the terminal responsible for processing functions (such as a graphics processing unit (GPU). Taking the application of this method to a terminal as an example, in this method, the terminal device enables a low-power mechanism. When the number of cell reselections by the terminal device is greater than or equal to a cell reselection threshold, or when the terminal device enters a high-speed mobile state, the terminal device exits the low-power mechanism.

[0053] This example demonstrates how, in high UE mobility scenarios, the delay caused by cell reselection is reduced by minimizing the significant wake-up latency introduced by the MR being in a deep sleep state after the UE enters the LP-WUR.

[0054] In one possible implementation, if the number of cell reselections by the terminal device within a preset time period is greater than or equal to the cell reselection number threshold, the terminal device exits the low-power mechanism.

[0055] In one possible implementation, the enabling low-power mechanism includes one or more of the following: activating the low-power mechanism, entering the low-power mechanism, and supporting the monitoring of low-power signals.

[0056] In one possible implementation, the exit from the low-power mechanism includes one or more of the following: deactivating the low-power mechanism, disabling the low-power mechanism, not supporting the monitoring of low-power signals, waking up the main receiver of the terminal device, or waking up the higher-power receiver of the terminal device.

[0057] Sixthly, this application provides a communication method that can be applied to network-side devices, such as network-side access network equipment, modules (e.g., circuits, chips, or chip systems) within the access network equipment, or logical nodes, logical modules, or software capable of implementing all or part of the functions of the access network equipment. Taking the application of this method to an access network equipment as an example, in this method, the access network equipment sends configuration information, which indicates parameters (such as offset values, time intervals, etc., from any of the first to fifth aspects mentioned above) in any implementation.

[0058] In one possible implementation, the access network device receives information from the core network device that indicates the capabilities of the terminal device.

[0059] In another possible implementation, the access network device receives information from the terminal device that indicates the terminal device's capabilities.

[0060] Seventhly, this application provides a communication method that can be applied to core network equipment, such as core network elements or modules (e.g., circuits, chips, or chip systems) within core network elements, or logical nodes, logical modules, or software capable of implementing all or part of the functions of core network elements. Taking the application of this method to core network equipment as an example, in this method, the core network equipment receives information from a terminal device, which indicates the capabilities of the terminal device. Furthermore, the core network equipment sends information to the access network equipment, which also indicates the capabilities of the terminal device.

[0061] Eighthly, this application provides a cell selection device. The communication device has the functions of the first aspect described above. For example, the communication device includes modules, units, or means corresponding to the operations involved in the first aspect. The modules, units, or means can be implemented by software, hardware, or a combination of software and hardware.

[0062] In one implementation, the communication device includes: a first processing module for performing cell search on at least one candidate cell; and a second processing module for selecting a first cell from the at least one candidate cell based on frequency priority. The first cell satisfies a first condition, which includes: both the cell selection receive level value and the cell selection quality value of the first cell are greater than 0.

[0063] For other implementation methods, please refer to the description in the first section, which will not be repeated here.

[0064] Ninthly, this application provides a cell reselection device. The communication device has the functions of the second aspect above. For example, the communication device includes modules, units, or means corresponding to the operations involved in the second aspect above. The modules, units, or means can be implemented by software, hardware, or a combination of software and hardware.

[0065] In one implementation, the communication device includes: a first processing module for determining at least one candidate cell, the at least one candidate cell including a first cell. The frequency priority of the first cell is higher than the frequency priority of the serving cell. A second processing module is configured to reselect from the serving cell to the first cell when the first cell meets a second condition. The second condition is described above and will not be repeated here.

[0066] For other implementation methods, please refer to the second section for details, which will not be elaborated here.

[0067] In a tenth aspect, this application provides a cell reselection measurement device. The communication device has the functions of the third aspect above. For example, the communication device includes modules, units, or means corresponding to the operations involved in the third aspect above. The modules, units, or means can be implemented by software, hardware, or a combination of software and hardware.

[0068] In one implementation, the communication device includes a processing module for performing cell measurements; wherein, when the serving cell meets a third condition, co-frequency measurements are not performed. This third condition is described above and will not be repeated here.

[0069] For other implementation methods, please refer to the description in the third section, which will not be repeated here.

[0070] Eleventhly, this application also provides a communication device that has the functions of the fourth aspect above. For example, the communication device includes modules, units, or means corresponding to the operations involved in the fourth aspect above. These modules, units, or means can be implemented by software, hardware, or a combination of software and hardware.

[0071] In one implementation, the communication device includes a processing module for performing cell measurements; wherein, when the serving cell meets a fourth condition, the terminal device performs co-frequency measurements. This fourth condition is described above and will not be repeated here.

[0072] For other implementation methods, please refer to the description in Section 4, which will not be repeated here.

[0073] In a twelfth aspect, this application also provides a communication device that has the functions of the fifth aspect described above. For example, the communication device includes modules, units, or means that perform the operations involved in the fifth aspect described above. These modules, units, or means can be implemented by software, hardware, or a combination of software and hardware.

[0074] In one implementation, the communication device includes a processing module configured to exit the low-power mechanism when the number of cell reselections of the terminal device is greater than or equal to a cell reselection threshold, or when the terminal device enters a high-speed mobile state.

[0075] For other implementation methods, please refer to the description in Section 5, which will not be repeated here.

[0076] In a thirteenth aspect, this application also provides a communication device that has the functions of the sixth aspect described above. For example, the communication device includes modules, units, or means that perform the operations involved in the sixth aspect described above. These modules, units, or means can be implemented by software, hardware, or a combination of software and hardware.

[0077] In one implementation, the communication device includes: a communication module for sending configuration information indicating parameters (such as offset values, time intervals, etc.) in any of the implementations of the first to fifth aspects.

[0078] For other implementation methods, please refer to the description in Section 5, which will not be repeated here.

[0079] In a fourteenth aspect, this application also provides a communication device that has the functions of the seventh aspect above. For example, the communication device includes modules, units, or means corresponding to the operations involved in the seventh aspect above. These modules, units, or means can be implemented by software, hardware, or a combination of software and hardware.

[0080] In one implementation, the communication device includes: a communication module for receiving information from a terminal device indicating the capabilities of the terminal device. Furthermore, the core network device sends information to the access network device indicating the capabilities of the terminal device.

[0081] In a fifteenth aspect, this application provides a communication device including a processor, the processor being configured to execute a computer program or computer-executable instructions stored in a memory, and / or to cause the device to perform a method provided in any of the possible embodiments of the first to seventh aspects via logic circuitry.

[0082] One possible implementation also includes memory. Alternatively, the memory and processor can be integrated together.

[0083] One possible implementation also includes an interface circuit.

[0084] In one possible implementation, the device is a chip or chip system.

[0085] In a sixteenth aspect, this application provides a computer-readable storage medium storing a computer program that is executed by a processor to implement the method provided in any of the possible embodiments of the first to seventh aspects.

[0086] In a seventeenth aspect, this application provides a computer program product that, when run on a computer, causes the computer to perform a method as provided in any of the possible embodiments of the first to seventh aspects.

[0087] It is understood that the apparatus described in aspects eight through fifteen, the computer storage medium described in aspect sixteen, or the computer program product described in aspect seventeen are all used to perform the methods provided in any of aspects one through seven. Therefore, the beneficial effects they can achieve can be referred to in the beneficial effects described in the corresponding methods, and will not be repeated here. Attached Figure Description

[0088] The accompanying drawings used in the embodiments of this application are described below.

[0089] Figure 1 is a schematic diagram of a wireless communication system provided in an embodiment of this application;

[0090] Figure 2 is a schematic diagram of the principle of OOK modulation provided in the embodiment of this application;

[0091] Figure 3 is a schematic diagram of the OFDM modulation principle provided in the embodiment of this application;

[0092] Figure 4 is a flowchart illustrating a cell selection method provided in an embodiment of this application;

[0093] Figure 5 is a flowchart illustrating a cell reselection method provided in an embodiment of this application;

[0094] Figure 6 is a flowchart illustrating a cell reselection measurement method provided in an embodiment of this application;

[0095] Figure 7 is a flowchart illustrating a communication method provided in an embodiment of this application;

[0096] Figure 8 is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0097] Figure 9 is a schematic diagram of another communication device provided in an embodiment of this application;

[0098] Figure 10 is a schematic diagram of the structure of another communication device provided in an embodiment of this application. Detailed Implementation

[0099] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is for explaining specific embodiments only and is not intended to limit the scope of this application.

[0100] The technology provided in this application can be applied to various communication systems, such as fourth-generation (4G) communication systems (e.g., Long Term Evolution (LTE) systems), fifth-generation (5G) communication systems, wireless local area network (WLAN) systems, satellite communication systems, integrated systems of multiple systems, or future communication systems. Among these, 5G communication systems can also be referred to as new radio (NR) systems.

[0101] In a communication system, a network element can send signals to or receive signals from another network element. These signals can include information, signaling, or data. The term "network element" can also be replaced by an entity, network entity, device, communication equipment, communication module, node, communication node, etc. This application uses a network element as an example for description. For instance, a communication system may include at least one terminal and at least one access network device. The access network device can send downlink signals to the terminal, and / or the terminal can send uplink signals to the access network device. Furthermore, it is understood that if the communication system includes multiple terminals, these terminals can also exchange signals; that is, both the signal-sending network element and the signal-receiving network element can be a terminal.

[0102] Referring to Figure 1, which is a simplified schematic diagram of a wireless communication system provided in an embodiment of this application, the wireless communication system includes a wireless access network 100. The wireless access network 100 can be a future wireless access network or an existing (e.g., 5G or 4G) wireless access network. One or more communication devices (120a-120j, collectively referred to as 120) can be interconnected or connected to one or more network devices (110a, 110b, collectively referred to as 110) within the wireless access network 100. Figure 1 is only a schematic diagram; the wireless communication system may also include other devices, such as core network devices, wireless relay devices, and / or wireless backhaul devices, which are not shown in Figure 1.

[0103] For example, in practical applications, this wireless communication system can simultaneously include multiple network devices (also called access network devices) and multiple communication devices. A network device can simultaneously serve one or more communication devices. A communication device can also simultaneously access one or more network devices. This application embodiment does not limit the number of communication devices and network devices included in the wireless communication system.

[0104] In this context, a network device can be an entity on the network side used to transmit or receive signals. A network device can also be an access device that allows communication devices to wirelessly connect to the wireless communication system; for example, a network device can be a base station. A base station can broadly encompass, or be replaced by, various names including: NodeB, Evolved NodeB (eNB), Next Generation NodeB (gNB), Access Network Equipment in Open Radio Access Network (O-RAN), Relay Station, Access Point, Transmitting and Receiving Point (TRP), Transmitting Point (TP), Main eNB (MeNB), Secondary eNB (SeNB), Multi-mode Radio Node, Home Base Station, Network Controller, Access Node, Radio Node, Access Point (AP), Transmitting Node, Transceiver Node, Baseband Unit (BBU), Remote Radio Unit (RRU), Active Antenna Unit (AAU), Remote Radio Head (RRH), Centralized Unit (CU), Distributed Unit (DU), Radio Unit (RU), Centralized Unit Control Plane (CU control). Network devices can include CU-CP (Comprehensive User Plane) nodes, CU-UP (Comprehensive User Plane) nodes, and positioning nodes. Base stations can be macro base stations, micro base stations, relay nodes, donor nodes, or similar entities, or combinations thereof. Network equipment can also refer to communication modules, modems, or chips installed within the aforementioned devices or apparatuses. Network equipment can also be mobile switching centers and devices that function as base stations in device-to-device (D2D), vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, as well as devices that function as base stations in future communication systems. Network equipment can support networks using the same or different access technologies. The embodiments of this application do not limit the specific technologies or device forms used in the network equipment.

[0105] All or part of the functions of the network device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform). The network device in this application can also be a logical node, logical module, or software capable of implementing all or part of the functions of a network device.

[0106] Network devices can be fixed or mobile. For example, base stations 110a and 110b are stationary and are responsible for wireless transmission and reception in one or more cells from communication device 120. The helicopter or drone 120i shown in Figure 1 can be configured to act as a mobile base station, and one or more cells can move depending on the location of the mobile base station 120i. In other examples, the helicopter or drone (120i) can be configured as a communication device to communicate with base station 110b.

[0107] In this application, the communication device used to implement the above-mentioned network access functions can be an access network device, a network device with some access network functions, or a device capable of supporting the implementation of access network functions, such as a chip system, hardware circuit, software module, or hardware circuit plus software module. This device can be installed in the access network device or used in conjunction with the access network device. In the method of this application, the example of an access network device being used as the communication device to implement the access network device functions is described.

[0108] A communication device can be a user-side entity used to receive or transmit signals, such as a mobile phone. Communication devices can be used to connect people, objects, and machines. Communication devices can communicate with one or more core networks via network devices. Communication devices include handheld devices with wireless connectivity, other processing devices connected to a wireless modem, or vehicle-mounted devices. Communication devices can be portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile devices. Communication equipment 120 can be widely used in various scenarios, such as cellular communication, device-to-device, vehicle-to-everything (V2X), point-to-point (P2P), machine-to-machine (M2M), machine-type communication (MTC), Internet of Things (IoT), virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart cities, drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery and mobility, etc.Examples of communication equipment 120 include: user equipment (UE) conforming to the 3rd generation partnership project (3GPP) standard, fixed equipment, mobile equipment, handheld devices, wearable devices, cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, personal computers, smart books, vehicles, satellites, global positioning system (GPS) devices, drones, helicopters, aircraft, ships, remote control devices, smart home devices, industrial equipment, personal communication service (PCS) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), wireless network cameras, tablets, handheld computers, mobile internet devices (MIDs), wearable devices such as smartwatches, smart point-of-sale (POS) machines, customer-premises equipment (CPE), light UE, reduced capability UE (REDCAP UE), and industrial control equipment. Wireless terminals in various scenarios include those in vehicle-to-everything (V2X) systems, self-driving systems, smart grids, transportation safety systems, smart cities (e.g., smart gas pumps, high-speed rail terminals), and smart homes (e.g., smart speakers, smart coffee machines, smart printers). Communication equipment 120 can be wireless devices or devices used to install on wireless devices, such as communication modules, modems, or chips. Communication equipment can also be vehicle-mounted devices, such as complete vehicle units, on-board modules, on-board chips, on-board units (OBUs), or telematics boxes (T-BOXs). Communication equipment can also be called terminals, terminal equipment, user interfaces (UEs), mobile stations (MS), or mobile terminals (MTs). Communication equipment can also be communication devices in future wireless communication systems.The communication equipment can be used in dedicated network equipment or general-purpose equipment. The embodiments of this application do not limit the specific technology or form of the communication equipment.

[0109] For example, a communication device can be used to act as a base station. For instance, a UE can act as a scheduling entity, providing sidelink signaling between UEs in V2X, D2D, or point-to-point (P2P) scenarios. As shown in Figure 1, cellular phone 120a and car 120b communicate with each other using sidelink signaling. Cellular phone 120a communicates with smart home device 120e without relaying communication signals through base station 110b.

[0110] In this application, the communication device used to implement the functions of the communication equipment can be a terminal, a terminal having some of the functions of the aforementioned communication equipment, or a device capable of supporting the implementation of the functions of the aforementioned communication equipment, such as a chip system. This device can be installed in the terminal or used in conjunction with the terminal. In this application, the chip system can be composed of chips or include chips and other discrete components. The technical solutions provided in this application are described using a terminal or UE as an example of the communication device.

[0111] For example, a wireless communication system typically consists of cells, with a base station managing the cell and providing communication services to multiple mobile stations (MS) within it. The base station includes a base unit (BBU) and a remote unit (RRU). The BBU and RRU can be located in different places; for example, the RRU can be deployed remotely to a high-traffic area, while the BBU is located in a central equipment room. Alternatively, the BBU and RRU can be located in the same equipment room. The BBU and RRU can also be different components within the same rack. For example, a cell can correspond to a carrier or a member carrier.

[0112] It is understood that this application can be applied between network devices and communication devices, between network devices, or between communication devices, that is, between primary devices and secondary devices. The primary device can be a network device or a communication device. When the primary device is a network device, the secondary device can be another network device or a communication device. When the primary device is a communication device, the secondary device can be another communication device.

[0113] Communication between access network devices and terminals follows a specific protocol layer structure. This protocol layer structure can include a control plane protocol layer structure and a user plane protocol layer structure. For example, the control plane protocol layer structure can include the functions of protocol layers such as the radio resource control (RRC) layer, PDCP layer, radio link control (RLC) layer, medium access control (MAC) layer, and physical layer. Similarly, the user plane protocol layer structure can include the functions of protocol layers such as the PDCP layer, RLC layer, MAC layer, and physical layer. In one possible implementation, a service data adaptation protocol (SDAP) layer can be included above the PDCP layer.

[0114] For example, the protocol layer structure between the access network device and the terminal may also include an artificial intelligence (AI) layer for transmitting data related to AI functions.

[0115] Taking data transmission between access network devices and terminals as an example, data transmission needs to pass through user plane protocol layers, such as the SDAP layer, PDCP layer, RLC layer, MAC layer, and physical layer. The SDAP layer, PDCP layer, RLC layer, MAC layer, and physical layer can also be collectively referred to as the access layer. Based on the direction of data transmission, it is divided into sending and receiving; each of these layers is further divided into a sending part and a receiving part. Taking downlink data transmission as an example, after the PDCP layer obtains data from the upper layer, it transmits the data to the RLC layer and MAC layer. The MAC layer then generates a transport block, and finally, it is wirelessly transmitted through the physical layer. Data is encapsulated in corresponding ways at each layer. For example, data received by a layer from the upper layer is considered as the SDU of that layer. After encapsulation by that layer, it becomes a Protocol Data Unit (PDU) and is then passed to the next layer.

[0116] For example, the terminal may also have an application layer and a non-access layer. The application layer can be used to provide services to applications installed on the terminal. For instance, downlink data received by the terminal can be sequentially transmitted from the physical layer to the application layer, and then provided to the application by the application layer; or, the application layer can acquire data generated by the application and sequentially transmit the data to the physical layer for transmission to other communication devices. The non-access layer can be used to forward user data, such as forwarding uplink data received from the application layer to the SDAP layer or forwarding downlink data received from the SDAP layer to the application layer.

[0117] Access network equipment can include CUs and DUs. Multiple DUs can be centrally controlled by a single CU. As an example, the interface between the CU and DU can be called an F1 interface. The control plane (CP) interface can be F1-C, and the user plane (UP) interface can be F1-U. CUs and DUs can be distinguished according to the protocol layer of the wireless network: for example, the functions of the PDCP layer and above are located in the CU, and the functions of protocol layers below the PDCP layer (such as RLC and MAC layers) are located in the DU; or, for another example, the functions of the PDCP layer and above are located in the CU, and the functions of protocol layers below the PDCP layer are located in the DU.

[0118] It is understandable that the above division of CU and DU processing functions according to protocol layers is merely an example. Other division methods are also possible. For instance, CUs or DUs can be divided into those with more protocol layer functions, or they can be divided into those with partial protocol layer processing functions. In one design, some functions of the RLC layer and the protocol layer functions above the RLC layer are located in the CU, while the remaining functions of the RLC layer and the protocol layer functions below the RLC layer are located in the DU. In another design, the functions of CUs or DUs can be divided according to service type or other system requirements, such as latency. Functions that need to meet latency requirements are located in the DU, while functions that do not need to meet this latency requirement are located in the CU. In yet another design, the CU can also have one or more core network functions. For example, the CU can be located on the network side for convenient centralized management. In yet another design, the RU of the DU is remotely located. The RU has radio frequency functionality.

[0119] For example, DU and RU can be partitioned at the physical layer (PHY). For instance, DU can implement higher-level functions in the PHY layer, and RU can implement lower-level functions. Specifically, for transmission, the functions of the PHY layer may include adding cyclic redundancy check (CRC) codes, channel coding, rate matching, scrambling, modulation, layer mapping, precoding, resource mapping, physical antenna mapping, and / or radio frequency (RF) transmission functions. For reception, the functions of the PHY layer may include CRC, channel decoding, rate matching de-scrambling, demodulation, layer mapping de-mapping, channel detection, resource demapping, physical antenna demapping, and / or RF reception functions. The higher-level functions in the PHY layer may include a subset of the PHY layer's functions, for example, functions closer to the MAC layer, while the lower-level functions in the PHY layer may include another subset of the PHY layer's functions, for example, functions closer to the RF functions. For example, higher-level functions in the PHY layer may include adding CRC codes, channel coding, rate matching, scrambling, modulation, and layer mapping, while lower-level functions in the PHY layer may include precoding, resource mapping, physical antenna mapping, and radio frequency transmission functions; or, higher-level functions in the PHY layer may include adding CRC codes, channel coding, rate matching, scrambling, modulation, layer mapping, and precoding, while lower-level functions in the PHY layer may include resource mapping, physical antenna mapping, and radio frequency transmission functions.

[0120] For example, the functionality of a CU can be implemented by a single entity or by different entities. For instance, the functionality of the CU can be further divided, separating the control plane and user plane and implementing them through different entities: a control plane CU entity (i.e., the CU-CP entity) and a user plane CU entity (i.e., the CU-UP entity). These CU-CP and CU-UP entities can be coupled with a DU to jointly complete the functions of the access network device.

[0121] In the above architecture, signaling generated by the CU can be sent to the terminal via the DU, or signaling generated by the terminal can be sent to the CU via the DU. For example, signaling from the RRC or PDCP layer will eventually be processed into physical layer signaling and sent to the terminal, or it can be transformed from received physical layer signaling. Under this architecture, the RRC or PDCP layer signaling can be considered to be sent via the DU, or via the DU and RU.

[0122] For example, any one of DU, CU, CU-CP, CU-UP, and RU can be a software module, a hardware structure, or a combination of software and hardware structures, without limitation. The different entities can exist in different forms, without limitation. For example, DU, CU, CU-CP, and CU-UP are software modules, and RU is a hardware structure. These modules and the methods they execute are also within the scope of protection of this application.

[0123] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an O-RAN system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU.

[0124] It should be understood that the number and type of each device in the communication system shown in Figure 1 are for illustrative purposes only, and this application is not limited thereto. In actual applications, the communication system may include more terminals, more access network devices, and other network elements, such as core network devices and / or network elements used to implement artificial intelligence functions.

[0125] It is understood that all or part of the functions implemented by one or more of the terminals, access network devices, core network devices, or network elements used to implement artificial intelligence functions can be virtualized, that is, implemented through one or more of dedicated or general-purpose processors and corresponding software modules. Among these, the terminals and access network devices involve air interface transmission, and the transmit and receive functions of this interface can be implemented in hardware. Core network devices, such as operation administration and maintenance (OAM) network elements, can also be virtualized. For example, one or more of the functions of the virtualized terminals, access network devices, core network devices, or network elements used to implement artificial intelligence functions can be implemented by cloud devices, such as cloud devices in over-the-top (OTT) systems.

[0126] The method provided in this application can be used for communication between access network devices and terminals, or for communication between other communication devices, such as communication between macro base stations and micro base stations in a wireless backhaul link, or communication between two terminals in a sidelink (SL), etc., without limitation.

[0127] In this application, the phrase "sending information to... (e.g., a terminal)" or the related illustrations in the accompanying drawings can be understood as the destination of the information being the terminal. This can include sending information directly or indirectly to the terminal. Similarly, the phrase "receiving information from... (e.g., a terminal)" or "receiving information from... (e.g., a terminal)" or the related illustrations in the accompanying drawings can be understood as the source of the information being the terminal. This can include receiving information directly or indirectly from the terminal. Information may undergo necessary processing between the source and destination, such as format changes, but the destination can understand the valid information from the source. Similar expressions in this application can be interpreted similarly, and will not be elaborated further here.

[0128] The communication system applicable to the embodiments of this application has been described above. To facilitate understanding of the technical solutions provided by the embodiments of this application, the relevant technical features involved in the embodiments of this application will be explained below. It should be noted that these explanations are intended to make the embodiments of this application easier to understand and should not be considered as a limitation on the scope of protection claimed by this application.

[0129] (1) Wake up radio (WUR)

[0130] Wake-up radio can be understood as a function that reduces the power consumption of terminal devices. For terminal devices, wake-up radio refers to introducing a low-power (LP) interface on top of the traditional main radio (MR) module / circuit. This LP interface is implemented through a simple circuit or chip with low power consumption. The specific form of the LP interface is not limited in the embodiments of this application. For example, the LP interface can be implemented through a wake-up receiver (WUR), a low-power wake-up receiver (LP-WUR), a low-power radio (LR), a wake-up module, or a wake-up circuit. In this document, WUR can refer to a wake-up radio or a wake-up receiver. WUR in this document is interchangeable with LP-WUR, LR, wake-up module, or wake-up circuit.

[0131] The MR (Mobile Receiver) is primarily used for sending and / or receiving data / signaling. If there is no need for sending and / or receiving data / signaling, the MR can be turned off or placed in a sleep state or sleep mode. The WUR (Wake-up Receiver) can be used to wake up a sleep MR, for example, when there is a need for sending and / or receiving data / signaling, the WUR will wake up the MR. This design reduces the power consumption of the terminal device.

[0132] The signal received by the WUR can be called a low-power signal or a low-power wake-up signal (LP-WUS). When the terminal device detects / receives a low-power signal or LP-WUS, it can wake up the MR that is in a dormant state. For ease of description, this article uses LP-WUS as an example of a low-power signal.

[0133] (2) Types of WUR

[0134] LP-WUS bit information can be mapped to time units in various ways, or in other words, LP-WUS bit information can be modulated in various ways. For example, LP-WUS can use OOK modulation, and correspondingly, the WUR in the terminal device receives LP-WUS using envelope detection. As another example, WUS can also be transmitted using OFDM waveforms, and correspondingly, the WUR in the terminal device receives LP-WUS using phase detection. For ease of description, in this embodiment, LP-WUS using OFDM waveform transmission is referred to as LP-WUS using OFDM modulation (which will be described below).

[0135] A WUR that receives LP-WUS using phase detection can be considered as one type of receiver (e.g., called a Type I WUR), while a WUR that receives LP-WUS using envelope detection can be considered as another type of WUR (e.g., called a Type II WUR). The terms Type I and Type II WUR are relative and can be interpreted in various ways. Examples are given below.

[0136] (2.1) The first type of WUR is an OFDM receiver, and the second type of WUR is an OOK receiver.

[0137] (2.2) The first type of WUR is a receiver with both I and Q channels, and the second type of WUR is a receiver with only one of the I and Q channels.

[0138] (2.3) The first type of WUR is a coherent receiver, and the second type of WUR is a non-coherent receiver.

[0139] (2.4) The first type of WUR is a coherent receiver with both I and Q channels, while the second type of WUR is a non-coherent receiver with only one of the I and Q channels.

[0140] (2.5) The first type of WUR receives the signal using phase detection, and the second type of WUR receives the signal using energy / power / amplitude detection. Alternatively, the first type of WUR can / is able to detect phase information, and the second type of WUR can / is able to detect signal energy / power / amplitude.

[0141] (2.6) The first type of WUR can receive complex signals, while the second type of WUR cannot receive complex signals (e.g., the second type of WUR receives real signals).

[0142] (2.7) The first type of WUR has phase detection capability, while the second type of WUR has envelope detection capability or no phase detection capability. Alternatively, the first type of WUR supports receiving signals via phase detection, while the second type of WUR supports receiving signals via envelope detection. In the embodiments of this application, phase detection capability can be interchanged with correlation detection capability and sequence detection capability.

[0143] (2.8) Type I receivers can receive OFDM signals, while Type II receivers cannot receive OFDM signals (e.g., Type II receivers receive OOK signals).

[0144] (3) OOK modulation and OFDM modulation

[0145] OOK modulation uses the presence or absence of a signal to represent digital information. The bit information corresponding to a signal is mapped to at least one time unit through OOK modulation. One time unit corresponds to one bit of information, and the bit information is determined by detecting whether there is a signal in the time unit. A signal in a time unit means that the signal amplitude is not zero; this time unit is also called an ON time unit, or the time unit is in ON mode. Conversely, a signal in a time unit means that the signal amplitude is zero; this time unit is also called an OFF time unit, or the time unit is in OFF mode. Generally, if a sequence is transmitted in a time unit, then that time unit has a signal; if no sequence is transmitted in a time unit, then that time unit has no signal. For a given time unit, being ON or in ON mode can be decoded as 1; conversely, being OFF or in OFF mode can be decoded as 0.

[0146] Please refer to Figure 2, which illustrates the principle of OOK modulation. Figure 2 uses a signal with bit information of 1001 as an example.

[0147] After OOK modulation, the 4-bit information 1001 is sequentially mapped to four time units (e.g., time units 1 to 4). It should be understood that time units 1 and 4 are signal-containing time units, with sequences transmitted on them. Time units 2 and 3 are signal-free time units, with no sequences transmitted on them. When the receiver detects a sequence in time units 1 and 4, it can decode it as 1. When the receiver does not detect a sequence in time units 2 and 3, it can decode it as 0. Combining the decoding of the four time units yields 1001. It can be seen that for OOK modulation, only 1 bit of information can be obtained within a time unit. It can be understood that when the receiver detects a sequence in a time unit, it means the receiver has detected the envelope of the signal in that time unit; correspondingly, when the receiver does not detect a sequence in a time unit, it means the receiver has not detected the envelope of the signal in that time unit.

[0148] Please refer to Figure 3, which illustrates the principle of OFDM modulation. Figure 3 uses an example where the transmitting end stores four sequences (sequences 0 to 3 in the figure). These four sequences can be used to carry 2 bits of information; for example, sequence 0 corresponds to 00, sequence 1 corresponds to 01, sequence 2 corresponds to 10, and sequence 3 corresponds to 11. In a time unit, the corresponding bit information is 01. The access network device can determine the sequence 1 corresponding to bit information 01 based on the above correspondence between the four sequences and bit information. The access network device can then use sequence 1 to scramble this time unit.

[0149] As shown in Figure 3, within a single time unit, in addition to obtaining 1 bit of information through the ON / OFF mode, the sequence information of the ON time unit (2 bits of sequence information in Figure 3) can also be detected. Compared to OOK modulation, OFDM modulation can obtain more bits of information. Therefore, OFDM modulation requires less time-domain resources to transmit signals of the same length of bit information compared to OOK modulation. For example, to transmit signals of the same length of bit information, OFDM modulation requires M symbols, while OOK modulation requires N symbols, where M is less than N, and both M and N are positive numbers.

[0150] The modulation method used for the signal depends on the receiver's capabilities. Taking the aforementioned WUR as an example, if the WUR is a Type I WUR, then the LP-WUS bit information can be carried through the ON / OFF mode of the symbols and the sequence on the ON symbol. If the WUR is a Type II WUR, then the LP-WUS bit information can be carried through the ON / OFF mode of the symbols. The signal corresponding to a Type I WUR can be considered as one type of signal (e.g., called a Type I signal), and the signal corresponding to a Type II WUR can be considered as another type of signal (e.g., called a Type II signal). Since a Type II WUR requires more time-domain resources than a Type I WUR, the Type II signal is longer than the Type I signal; it can be called a "long signal," and the Type I signal a "short signal." The Type I signal can also be called a Type I low-power signal or Type I LP-WUS, and correspondingly, the Type II signal can also be called a Type II low-power signal or Type II LP-WUS. Relatively speaking, the power consumption required for a Type II WUR receiver to receive a Type II signal is greater than the power consumption required for a Type I WUR receiver to receive a Type I signal. Terminal devices using a Type I WUR to receive a Type I signal have greater energy-saving gains. Furthermore, the detection performance of Type II WURs is lower than that of Type I WURs, and the coverage performance supported by Type II WURs is also lower than that supported by Type I WURs. Generally, if a Type II WUR is used to receive signals, coverage enhancement techniques are employed to improve coverage performance. For example, for Type II WURs, coverage performance can be improved by increasing the number of signal repetitions.

[0151] In this embodiment, "time unit" refers to any unit of time. A time unit can be a radio frame, subframe, slot, mini-slot, OFDM symbol, OOK symbol, millisecond (ms), or fractional milliseconds (e.g., 1 / 32ms). Alternatively, a time unit can be multiple slots, multiple subframes, multiple mini-slots, multiple OFDM symbols, several milliseconds (ms), or several fractional milliseconds. A radio frame can include multiple subframes, a subframe can include one or more slots, and a slot can include at least one symbol. Alternatively, a radio frame can include multiple slots, a slot can include at least one symbol, an OFDM symbol can include multiple OOK symbols, and an OOK symbol can include multiple OFDM symbols. For ease of distinction, in this embodiment, the time unit mapped after OOK modulation is called an OOK time unit, and the time unit mapped after OFDM modulation is called an OFDM symbol. For ON mode, the OOK time unit is also called an OOK ON time unit.

[0152] (4) First LP-WUS generation method and second LP-WUS generation method

[0153] The first LP-WUS generation method refers to LP-WUS using OFDM modulation. Terminal equipment supporting the first LP-WUS generation method can be replaced by the terminal equipment supporting the use of at least OOK symbols or sequences on OOK ON symbols to carry LP-WUS bit information. For example, if the LP-WUS bit information includes first and second bits, the first LP-WUS generation method means that the first bit information of the LP-WUS is based on OOK modulation, and the second bit information of the LP-WUS is based on sequence modulation or OFDM modulation. Alternatively, the first LP-WUS generation method means that the first bit information of the LP-WUS is carried using an ON / OFF mode, and the second bit information of the LP-WUS is carried using sequences on OOK symbols or OOK ON symbols. It is understood that LP-WUS generated based on the first LP-WUS generation method can only be received by Type I WURs, and LP-WUS generated based on the first LP-WUS generation method does not need to be retransmitted, or the maximum number of retransmissions of LP-WUS generated based on the first LP-WUS generation method is 1.

[0154] Since the LP-WUS generated using the first LP-WUS generation method is a "short signal" and occupies fewer time-domain resources, from this perspective, the first LP-WUS generation method can also be understood as: an LP-WUS generation method that occupies fewer time-domain resources. The terminal device supporting the first LP-WUS generation method can be replaced by: the terminal device supporting LP-WUS that occupies / uses fewer time-domain resources; the terminal device supporting LP-WUS transmission with fewer time-domain resources; or, the terminal device supporting LP-WUS resource occupancy rate being less than or equal to x1%; or, the terminal device supporting available resource ratio being greater than or equal to x1%, where x1 can be (pre)configured or protocol-defined. In the embodiments of this application, resources include time-domain resources and / or frequency-domain resources.

[0155] Furthermore, the terminal device receives LP-WUS generated using the first LP-WUS generation method with lower power consumption and greater energy-saving gain when using the first type of WUR, making it suitable for scenarios with high load. From this perspective, the first LP-WUS generation method can also be understood as: an LP-WUS generation method with a load rate greater than or equal to y1%, or an LP-WUS generation method with an energy-saving gain greater than or equal to z1%. Here, y1 and z1 can both be (pre)configured or protocol-defined. The terminal device supporting the first LP-WUS generation method can be replaced by: the terminal device supporting LP-WUS with a load rate greater than or equal to y1%, or the terminal device supporting LP-WUS with an energy-saving gain greater than or equal to z1%.

[0156] Similarly, the second LP-WUS generation method refers to LP-WUS using OOK modulation. Terminal device support for the second LP-WUS generation method can be replaced by the terminal device supporting at least the use of ON / OFF mode to carry all bit information of the LP-WUS. For example, if the LP-WUS bit information is the first bit information, the second LP-WUS generation method refers to using ON / OFF mode to carry the first bit information of the LP-WUS. It can be understood that LP-WUS generated based on the second LP-WUS generation method can only be received by Type II WURs, while LP-WUS generated based on the first LP-WUS generation method needs to be repeatedly transmitted, or the maximum number of repeated transmissions of LP-WUS generated based on the second LP-WUS generation method is greater than or equal to 1.

[0157] Since the LP-WUS generated using the second LP-WUS generation method is a "long signal," it occupies more time-domain resources. From this perspective, the second LP-WUS generation method can also be understood as an LP-WUS generation method that occupies more time-domain resources. The terminal device's support for the second LP-WUS generation method can be replaced by: the terminal device supporting LP-WUS that occupies / uses more time-domain resources; the terminal device supporting LP-WUS transmission with more time-domain resources; or the terminal device supporting LP-WUS resource occupancy rate greater than or equal to x2%; or the terminal device supporting available resource ratio greater than or equal to x2%, where x2 can be (pre)configured or protocol-defined. In this embodiment, resources include time-domain resources and / or frequency-domain resources.

[0158] Furthermore, receiving LP-WUS generated by the second LP-WUS generation method using the second type of WUR consumes more power and has a smaller energy-saving gain, making it suitable for scenarios with lower loads. From this perspective, the second LP-WUS generation method can also be understood as: an LP-WUS generation method with a load rate less than or equal to y2%, or an LP-WUS generation method with an energy-saving gain less than or equal to z2%. Here, y2 and z2 can both be (pre)configured or protocol-defined. The terminal device supporting the second LP-WUS generation method can be replaced by: the terminal device supporting LP-WUS with a load rate less than or equal to y2%, or the terminal device supporting LP-WUS with an energy-saving gain less than or equal to z2%.

[0159] It should be noted that the resource utilization statistics mentioned above are based on time-domain resource utilization over a fixed period of time. The available resource ratio statistics mentioned above are based on the average, median, minimum, or maximum value of available resources over a fixed period of time. There are no restrictions on the size of the statistical granularity; for example, the statistical granularity can be a time unit, which can be a month / week / day / h / s / ms / system frame / subframe / half-frame / slot / min-slot / symbol, or even smaller time units, such as further splitting symbols (e.g., 1 / 2 symbol or 1 / 4 symbol, etc.). The frequency-domain resource utilization statistics are based on the UE's maximum bandwidth capacity, or the network's maximum system bandwidth, or the PDSCH's maximum transmission bandwidth, or the PDCCH's maximum transmission bandwidth, or the maximum transmission bandwidth, or the maximum carrier bandwidth, or the maximum bandwidth portion of the BWP, or the maximum transmission bandwidth portion. Here, bandwidth can be understood as radio frequency bandwidth or baseband bandwidth.

[0160] In the embodiments of this application, "the terminal device supports a first LP-WUS generation method," "the terminal device supports an OFDM modulation method," "the terminal device supports an OFDM receiver receiving signals," "the terminal device supports mapping part or all of the signal to at least one time unit, where the signal amplitude in the at least one time unit is not zero," and "the terminal device only supports mapping part or all of the signal to at least one time unit, where the signal amplitude in the at least one time unit is not zero" are interchangeable. "The terminal device supports a second LP-WUS generation method" is interchangeable with "the terminal device supports an OOK modulation method" and "the terminal device supports an OOK receiver receiving signals."

[0161] It should be noted that the specific names of the first LP-WUS generation method and the second LP-WUS generation method are not limited in the embodiments of this application; they essentially refer to two methods of signal generation.

[0162] (5) Community selection process

[0163] 1. The UE performs cell selection through one of the following two procedures:

[0164] a) Initial cell selection (no prior information, it is unknown which radio frequency (RF) channels are NR frequencies):

[0165] (1) The UE should scan all RF channels in the NR band to find a suitable cell based on its capabilities.

[0166] (2) At each frequency, the UE only needs to search for the cell with the strongest signal.

[0167] (3) Once a suitable community is found, it should be selected.

[0168] b) Selecting a cell using stored information:

[0169] (1) This process requires storing frequency information, which comes from previously received measurement control information or previously detected cell parameter information.

[0170] (2) Once the UE finds a suitable cell, the UE should select it.

[0171] (3) If no suitable cell is found, the initial cell selection process should be started.

[0172] It should be noted that, regardless of which process is used to perform cell selection, the priority between different frequencies or RATs provided to the UE through system information or dedicated signaling is not used during the cell selection process.

[0173] 2. Community Selection Criteria

[0174] The criteria for cell selection, commonly known as the S criterion (Srxlev>0 and Squal>0), determine whether a cell is suitable for access by using parameters such as cell reception level and quality.

[0175] Where: Cell selected receive level value Srxlev=Qrxlevmeas–(Qrxlevmin+Qrxlevminoffset)–Pcompensation–Qoffsettemp, that is, cell selected receive level value = measured cell receive level value – (minimum receive level value required by the cell + offset value) – level compensation value – offset temporarily applied to the cell.

[0176] Cell selection quality value Squal = Qqualmeas – (Qqualmin + Qqualminoffset) – Qoffsettemp, that is, cell selection quality value = measured cell quality value – (minimum quality value required by the cell + offset value) – offset temporarily applied to the cell.

[0177] (6) Cell reselection process

[0178] In RRC idle or RRC inactive states, the UE can perform RRM measurements for the serving cell and neighbor cells. RRM measurements are used for cell reselection. Neighbor cell measurements further include one or more of intra-frequency, inter-frequency, or inter-system (RAT) measurements. During measurement, the UE should measure the serving cell and simultaneously measure neighbor cells according to the S-criteria configured by the base station. The UE performs neighbor cell measurements according to the S-criteria as follows: for test frequencies with a priority higher than the serving cell's frequency, the UE should measure them; for test frequencies with a priority equal to or lower than the current serving cell's frequency, if the current measurement result of the serving cell is higher than the threshold corresponding to the S-criteria, the UE does not need to measure these test frequencies; if the current measurement result of the serving cell is lower than or equal to the threshold corresponding to the S-criteria, the UE needs to measure these test frequencies.

[0179] Based on measurement results, the UE can decide whether to remain in the current serving cell (e.g., the cell the UE is currently camped on) or perform cell reselection to ensure the UE camps on a cell with better channel quality. For example, for cells on frequencies with higher reselection priority (also known as high-priority frequencies), if the signal quality value of neighboring cells exceeds a certain threshold within a certain time interval, the UE should perform cell reselection. Therefore, for cells on frequencies with higher reselection priority, even if the serving cell has better signal quality, the UE may still reselect to a cell on a frequency with higher reselection priority. For cells on frequencies with the same reselection priority as the serving cell (also known as equal-priority frequencies), the UE can perform cell reselection according to cell reselection criteria. During cell reselection, the UE starts with the highest-priority cell / frequency and judges according to the cell reselection criteria; if the requirements are not met, it then judges with the next lower-priority cell / frequency and judges according to the cell reselection criteria.

[0180] The criteria for cell reselection are as follows:

[0181] 1) If the system message broadcasts the serving cell low-priority RSRQ threshold (threshServingLowQ), the cell will reselect to a higher-priority NR frequency or inter-system frequency than the serving cell frequency when the following conditions are met: The UE has camped in the current serving cell for more than 1 second, and the cell with a higher-priority NR or EUTRAN RAT / frequency satisfies Squal(signal quality of the current serving cell) > Thresh within the TreselectionRAT time interval. X,HighQ (High-priority RSRQ reselection threshold for different frequencies / systems).

[0182] 2) If threshServingLowQ is not broadcast in the system message, when the following conditions are met, the cell reselection occurs to an NR frequency band or an inter-system frequency band with a higher priority than the serving cell frequency band: The UE has stayed in the current serving cell for more than 1 s, and a cell with a higher priority NR or EUTRAN RAT / frequency band satisfies Srxlev (signal quality of the current serving cell) > Thresh X,HighQ 。

[0183] 3) If threshServingLowQ is broadcast in the system message, when the following conditions are met, the cell reselection occurs to an NR frequency band or an inter-system frequency band with a lower priority than the serving cell frequency band: The UE has stayed in the current serving cell for more than 1 s, and the serving cell satisfies Squal < ThreshServing,LowQ, and a cell with a lower priority NR or EUTRAN RAT / frequency band satisfies Squal > Thresh within the time interval TreselectionRAT X,HighQ 。

[0184] 4) If threshServingLowQ is not broadcast in the system message, when the following conditions are met, the cell reselection occurs to an NR frequency band or an inter-system frequency band with a lower priority than the serving cell frequency band: The UE has stayed in the current serving cell for more than 1 s, and the serving cell satisfies Srxlev < Thresh Serving, LowP and a cell with a lower priority NR or EUTRAN RAT / frequency band satisfies Srxlev > Thresh within the time interval TreselectionRAT X,LowP 。

[0185] If multiple cells with different priorities meet the cell reselection criteria, the cell reselection of a higher priority RAT / frequency band should be prioritized over that of a lower priority RAT / frequency band. If more than one cell meets the above criteria, the UE should reselect the cell in the following way: If the highest priority frequency band is an NR frequency band, select the cell with the highest rank among the cells that meet the conditions under the highest priority frequency band. If the highest priority frequency band is an inter-system frequency band, select the cell with the strongest signal among the cells on the highest priority frequency band that meet the requirements of that system

[0186] For cells operating on the same frequency or with equal priority but operating at different frequencies, cell reselection can be performed based on the R criterion. The R criterion involves calculating a rank (R) value for each neighboring cell and the serving cell based on its signal quality. Cells are then ranked according to their R values. A neighboring cell with an R value greater than that of the serving cell meets the reselection criteria. If multiple neighboring cells meet the criteria, the cell with the best signal quality is selected. For cells operating on frequencies with lower reselection priority (also known as low-priority frequencies), the reselection conditions are more stringent. For example, a reselection condition might be that within a certain time interval, if the signal quality value of the serving cell is below a certain threshold and the signal quality value of a neighboring cell is above a certain threshold, then the UE should perform cell reselection.

[0187] Specifically, the cell ranking criterion Rs of the serving cell satisfies Rs = Qmeas,s + Qhyst – Qoffsettemp, and the neighbor cell ranking criterion Rn satisfies: Rn = Qmeas,n – Qoffset – Qoffsettemp.

[0188] The UE will sort all cells that meet the cell selection criterion S. The conditions for meeting cell selection criterion S are: Srxlev > 0 and Squal > 0. Where Srxlev = Qrxlevmeas – (Qrxlevmin + Qrxlevminoffset) – Pcompensation – Qoffsettemp, and Squal = Qqualmeas – (Qqualmin + Qqualminoffset) – Qoffsettemp. By deriving Qmeas,n and Qmeas,s, and calculating the R value using the average of the RSRP results, the cells are sorted according to the R criterion specified above. If rangeToBestCell is not configured, the UE should reselect to the highest-ranked cell. If rangeToBestCell is configured, the UE should reselect to the cell with the maximum number of beams above the threshold (i.e., absThreshSS-BlocksContegration) within the rangeToBestCell of the highest-ranked cell. If multiple such cells exist, the UE should reselect to the highest-ranked cell among them.

[0189] In all cases, a UE can only reselect to a new cell if the following conditions are met: during the TreselectionRAT time interval, the new cell is preferred over the serving cell according to the cell reselection criteria specified above; and the UE has been camped on the current serving cell for more than 1 second.

[0190] It should be noted that if rangeToBestCell is configured on the NR frequency point but absThreshSS-BlocksConfixation is not configured, the UE will assume that each cell on that frequency point has a beam that is above the threshold.

[0191] In this application embodiment, the terminal device supporting low-power (LP) features means that the terminal device has LP capability / WUR capability. Having WUR capability is equivalent to any of the following descriptions: having the ability to receive low-power signals, or having the ability to receive wake-up signals, or having the ability to receive low-power wake-up signals; or supporting LP-WUS, having LP-WUS monitoring capability, or being configured with WUR or LP-WUS functions; or having energy-saving needs (preference), or having energy-saving interests; or having WUR or LP-WUS functions enabled, or having LP-WUS monitoring enabled; supporting receiving LP signals through an LP receiver / link / interface, or being configured to receive LP signals through an LP receiver / link / interface, or being allowed / activated to receive LP signals through an LP receiver / link / interface. Additionally, "supporting low-power features" can be replaced with "supporting LP-WUS features". "The terminal device supports LP-WUS features" can be understood as "The terminal device has an LP-WUS module", "The terminal device has a low-power receiver", "The terminal device has a simple receiver", "The terminal device has a low-power receiver architecture", "The terminal device supports OOK modulation", "The terminal device only has radio frequency circuits", "The terminal device does not enable baseband related modules", "The terminal device enables LP-WUS", "The terminal device is capable of receiving LP-WUS", "The terminal device is capable of receiving low-power signals", "The terminal device can activate LP-WUS", or "The terminal device has the ability to monitor low-power signals".

[0192] This application does not limit the type of low-power signal in its embodiments. For example, low-power signals can be low-power physical downlink control channel (PDCCH), low-power physical downlink shared channel (PDSCH), low-power physical uplink shared channel (PUSCH), low-power physical uplink control channel (PUCCH), low-power synchronization signal / physical broadcast channel block (SSB), low-power synchronization signal, low-power tracking reference signal (TRS), low-power channel status information reference signal (CSI-RS), low-power positioning signal, low-power sensing communication signal, low-power sounding reference signal (SRS), low-power random access channel (RACH), low-power preamble, low-power contention resolution message, low-power downlink control information (DCI), or low-power uplink control information (UCI), etc.

[0193] The greater the energy-saving demand of a terminal device, the greater the required energy-saving gain. A terminal device with a significant energy-saving demand can be considered to expect to operate in a low-power mode, or to expect to enter a low-power mode, or to support a low-power mode. Conversely, the smaller the energy-saving demand of a terminal device, the lower the required energy-saving gain. A terminal device with a small energy-saving demand can be considered to not need to operate in a low-power mode, or not need to enter a low-power mode.

[0194] "Cell" can be understood as "cell frequency point", "carrier frequency", "carrier frequency point", or "frequency point", and these terms are interchangeable unless otherwise specified. A frequency point can be the center frequency point, carrier frequency, frequency domain position corresponding to a frequency number, frequency band, frequency domain position corresponding to the center of a bandwidth, frequency domain position, the center frequency point of a bandwidth portion, or the frequency domain position corresponding to the center of a bandwidth portion.

[0195] The architecture of the embodiments of this application has been described above. The methods of the embodiments of this application will now be described in detail below. In the embodiments of this application, the executing entity of the method can be a terminal device, a network device, or a module, circuit, or chip within the terminal device or network device. The following description uses a terminal network or network device as an example of the executing entity. When the executing entity is a module, circuit, or chip within the terminal network or network device, receiving / transmitting can be understood as input / output, that is, the module, circuit, or chip communicates with other modules, circuits, or chips in the terminal device or network device. Furthermore, the processing performed by a single executing entity can also be divided into multiple executing entities, which can be logically and / or physically separated. For example, the processing performed by a network device can be divided into execution by at least one of CU, DU, RU, etc.

[0196] Referring to Figure 4, a flowchart illustrating a cell selection method according to an embodiment of this application is shown. Optionally, this method can be applied to the aforementioned communication system, such as the communication system shown in Figure 1. The cell selection method shown in Figure 4 may include steps 401-402. Steps 401-402 are as follows:

[0197] 401. The terminal device performs a cell search on at least one candidate cell.

[0198] The at least one candidate cell can be any cell. Optionally, the at least one candidate cell can be determined based on system messages or dedicated signaling.

[0199] 402. The terminal device selects a first cell from at least one candidate cell based on frequency priority. The first cell satisfies a first condition, which includes that the cell selection received level value and the cell selection quality value of the first cell are both greater than 0.

[0200] In one possible implementation, the frequency priority mentioned above can be configured by the network device through system information or dedicated signaling. For example, the frequency priority can be the priority between different frequencies or RATs.

[0201] In another possible implementation, the frequency priority of the first cell is higher than or equal to the highest frequency priority that the network device can configure. In this example, the terminal device can increase the priority of cells that support low-power modes. The terminal device can increase the frequency priority of the cell it wishes to camp on, thus further increasing the probability that the UE will camp on a cell that supports low-power features.

[0202] For example, in one possible implementation, when the UE supports LP-WUS features and the UE only has OFDM receiver capabilities, the UE will always consider the frequency points / cells that support LP-WUS and support the first LP-WUS generation method (LP-WUS that occupies less time domain resources) as the highest priority.

[0203] In another possible implementation, when the UE supports LP-WUS features and the UE only has OOK receiver capabilities, the UE will always consider the frequency points / cells that support LP-WUS and support the second LP-WUS generation method (LP-WUS that occupies more time domain resources) as the highest priority.

[0204] In another possible implementation, when the UE supports LP-WUS features and has OOK and OFDM receiver capabilities, the UE will always consider the frequency / cell that supports LP-WUS as the highest priority.

[0205] In another possible implementation, when the UE supports LP-WUS features, has OOK receiver and OFDM receiver capabilities, and has a large energy-saving requirement, the UE will always consider the frequency points / cells that support LP-WUS and support the second LP-WUS generation method (LP-WUS that occupies more time domain resources) as the highest priority.

[0206] In another possible implementation, when the UE supports LP-WUS features, has OOK receiver and OFDM receiver capabilities, and has a small energy-saving requirement, the UE will always consider the frequency point / cell that supports LP-WUS and supports the first LP-WUS generation method (LP-WUS that occupies less time domain resources) as the highest priority.

[0207] In another possible implementation, if the network supports not only the first LP-WUS generation method but also the second LP-WUS generation method, then as long as the UE supports the LP-WUS feature, the UE will always consider the frequency point / cell that supports LP-WUS as the highest priority.

[0208] In another possible implementation, when the UE supports the LP-WUS feature, the UE will always consider the frequency / cell that does not support LP-WUS as the lowest priority.

[0209] In another possible implementation, when the UE supports LP-WUS features and has a significant energy-saving requirement, the UE will always consider the frequency / cell that supports LP-WUS as the highest priority.

[0210] In another possible implementation, when the UE supports the LP-WUS feature, the UE will always consider the frequency point / cell that supports LP-WUS, and the frequency point / cell with the smallest frequency point, as the highest priority.

[0211] In another possible implementation, when the UE supports LP-WUS features and the UE only has OFDM receiver capabilities, the UE will always consider the frequency point / cell that supports LP-WUS, supports the first LP-WUS generation method (LP-WUS that occupies less time domain resources), and the frequency point / cell with the smallest frequency point as the highest priority.

[0212] In another possible implementation, the UE will always consider the frequency / cell with the smallest frequency as the highest priority.

[0213] The above description of "first LP-WUS generation method" can also be replaced with "transmitting LP-WUS that occupies less time domain resources," "sending LP-WUS that occupies less time domain resources," or "transmitting LP-WUS using less time domain resources." For example, "supporting the first LP-WUS generation method" can be understood as "supporting the transmission of LP-WUS that occupies less time domain resources." For example, "supporting the first LP-WUS generation method" can be understood as "supporting the transmission of LP-WUS using less time domain resources."

[0214] The phrase "supports the first LP-WUS generation method" can also be replaced with "load greater than x%", "heavy load", "high load", "large load", "resource occupancy rate greater than x%", "time domain resource occupancy rate greater than x%", "frequency domain resource occupancy rate greater than x%", or "available resource ratio less than x%". For example, with a time domain resource occupancy rate greater than x%, x = 70. When the UE supports LP-WUS and only has OFDM receiver capabilities, the UE will always consider frequencies / cells supporting LP-WUS with a time domain resource occupancy rate greater than 70% as having the highest priority. Other descriptions can be applied to this example. The resources mentioned above include time domain resources and / or frequency domain resources. The statistics on the time domain resource occupancy rate are based on the time domain resource occupancy rate over a fixed period. The statistics on the available resource ratio are based on the average, median, minimum, or maximum value of available resources over a fixed period. The statistical granularity can be different time units. For example, the interpretation of a time unit (for all embodiments) can be month / week / day / h / s / ms / system frame / subframe / half frame / slot / min-slot / symbol, or even smaller time units, such as further splitting a symbol. For example, 1 / 2 symbol, 1 / 4 symbol, 1 / 8 symbol, 1 / 16 symbol, etc. The baseline for calculating frequency domain resource occupancy is the UE's maximum bandwidth capacity, or the network's maximum system bandwidth, or the PDSCH's maximum transmission bandwidth, or the PDCCH's maximum transmission bandwidth, or the maximum transmission bandwidth, or the maximum carrier bandwidth, or the maximum bandwidth portion (BWP), or the maximum transmission bandwidth portion. Here, bandwidth can be understood as radio frequency bandwidth or baseband bandwidth. The frequency domain resources occupied by this baseline can be considered 100%.

[0215] The aforementioned second LP-WUS generation method can be understood as follows: the bit information of LP-WUS is based on OOK modulation; it can also be understood as using ON / OFF mode to carry all the bit information of LP-WUS; it can also be understood as LP-WUS based on the second LP-WUS generation method can be received by both envelope detection receiver and sequence detection receiver; it can also be understood as LP-WUS corresponding to the second LP-WUS generation method needs to be repeatedly transmitted, or the maximum number of repeated transmissions is greater than or equal to 1.

[0216] Furthermore, the description of "second LP-WUS generation method" above can also be replaced with "transmitting LP-WUS that occupies more time domain resources," "sending LP-WUS that occupies more time domain resources," or "transmitting LP-WUS using more time domain resources." For example, "supporting the second LP-WUS generation method" can be understood as "supporting the transmission of LP-WUS that occupies more time domain resources." For example, "supporting the second LP-WUS generation method" can be understood as "supporting the transmission of LP-WUS using more time domain resources."

[0217] The phrase "supports the second LP-WUS generation method" can also be replaced with "load less than y%", "light load", "low load", "small load", "resource utilization rate less than y%", "time domain resource utilization rate less than y%", "frequency domain resource utilization rate less than y%", or "available resource ratio greater than y%". For example, with a time domain resource utilization rate of less than y%, x = 30. When the UE supports LP-WUS and only has envelope detection receiver capabilities, the UE will always consider frequencies / cells supporting LP-WUS with a time domain resource utilization rate of less than 30% as having the highest priority. Other descriptions can be applied to this example. The resources mentioned above include time domain resources and / or frequency domain resources. The statistics on the time domain resource utilization rate are based on the time domain resource utilization rate over a fixed period. The statistics on the available resource ratio are based on the average, median, minimum, or maximum value of available resources over a fixed period. The statistical granularity can be different time units. For example, the interpretation of a time unit (for all embodiments) can be month / week / day / h / s / ms / system frame / subframe / half frame / slot / min-slot / symbol, or even smaller time units, such as further splitting a symbol. For example, 1 / 2 symbol, 1 / 4 symbol, 1 / 8 symbol, 1 / 16 symbol, etc. The baseline for calculating frequency domain resource occupancy is the UE's maximum bandwidth capacity, or the network's maximum system bandwidth, or the PDSCH's maximum transmission bandwidth, or the PDCCH's maximum transmission bandwidth, or the maximum transmission bandwidth, or the maximum carrier bandwidth, or the maximum bandwidth portion (BWP), or the maximum transmission bandwidth portion. Here, bandwidth can be understood as radio frequency bandwidth or baseband bandwidth. The frequency domain resources occupied by this baseline can be considered 100%.

[0218] One feasible approach is that if the network supports not only the first LP-WUS generation method but also the second LP-WUS generation method, then as long as the UE supports the LP-WUS feature, the UE will always consider the frequency point / cell that supports LP-WUS as the highest priority.

[0219] In one implementation, the frequency priority is the cell reselection priority; or, the frequency priority is the cell reselection sub-priority; or, the frequency priority is the sum of the cell reselection priority and the cell reselection sub-priority.

[0220] Here, the frequency priority is the priority for cell reselection. Compared to the cell reselection priority and cell reselection sub-priority, the cell's frequency priority can be considered as the absolute priority of cell reselection. This application does not limit the specific implementation of the cell's frequency priority. For example, the cell's frequency priority can be the cell reselection priority, or it can be the cell reselection sub-priority, or the sum of the cell reselection priority and the cell reselection sub-priority can be used as the cell's frequency priority.

[0221] In one implementation, when the frequency priority is the sum of the cell reselection priority and the cell reselection sub-priority, cells supporting low-power characteristics have the same cell reselection priority, and the cell reselection sub-priority corresponding to the cell with the lowest frequency among the cells supporting low-power characteristics is the highest; or, cells supporting low-power characteristics and whose partial or all information of the low-power signal is mapped only to the first time unit (the signal amplitude in the first time unit is not zero) have the same cell reselection priority, and the cell reselection sub-priority corresponding to the cell with the lowest frequency among the aforementioned cells supporting low-power characteristics and whose partial or all information of the low-power signal is mapped only to the first time unit is the highest; or, cells supporting low-power characteristics and whose cells support all bit information of the low-power signal modulated with OOK have the same cell reselection priority, and the cell reselection sub-priority corresponding to the cell with the lowest frequency among the aforementioned cells supporting low-power characteristics and whose cells support all bit information of the low-power signal modulated with OOK is the highest.

[0222] When a cell's frequency priority is the sum of its cell reselection priority and its sub-priorities, the cell reselection priorities of these cells can be treated equally, even though their sub-priorities may differ. This approach, designing priorities at different granularities, offers greater flexibility. Furthermore, prioritizing at different granularities can meet the needs of terminal or network devices with varying levels of complexity.

[0223] Optionally, the terminal device selects a first cell from at least one candidate cell based on frequency priority, including: the terminal device selecting candidate cells that satisfy a first condition from the at least one candidate cell. Then, the terminal device selects the cell with the highest frequency priority from these candidate cells, i.e., determines it as the first cell. Optionally, the terminal device sorts the frequency priorities of these candidate cells that satisfy the first condition from high to low to obtain sorted candidate cells. Then, the terminal device selects the cell with the highest frequency priority from the sorted candidate cells in descending order.

[0224] In one possible implementation, the first cell is the cell with the highest frequency priority among the at least one candidate cells that satisfy the first condition. For example, the cell with the highest frequency priority is selected as the first cell from the candidate cells that satisfy the first condition.

[0225] Understandably, in one possible implementation, the first cell is the cell with the highest frequency priority among at least one candidate cell. That is, among the at least one candidate cell, the first cell has the highest frequency priority, and the first cell also satisfies the first condition mentioned above.

[0226] In another possible implementation, the first cell is the cell with the highest frequency priority among at least one candidate cell, and the frequency priority of the first cell is higher than or equal to the highest frequency priority that the network device can configure. For a description of this part, please refer to the above description; it will not be repeated here.

[0227] In one possible implementation, the first cell supports low-power characteristics. It should be noted that this example uses the first cell supporting low-power characteristics as an illustration; the first cell may also correspond to one or more of the following: supporting a certain LP-WUS generation method, supporting a certain receiver signal reception, the terminal device having (significant) energy-saving requirements, supporting energy-saving gain greater than or equal to a certain threshold, supporting a load rate greater than or equal to a certain threshold, signal quality greater than or equal to a certain threshold, supporting the lowest supported frequency, etc.

[0228] In one possible implementation, the frequency priority of the at least one candidate cell that does not support low-power features is configured by the network device.

[0229] In another possible implementation, the frequency priority of cells that do not support low-power features among the at least one candidate cell can also be adjusted by the UE. For example, the UE can lower the frequency priority of cells that do not support low-power features by a certain value.

[0230] In one possible implementation, a first timer is started before step 402. Before the first timer expires, a first cell is selected from at least one candidate cell based on frequency priority. This example implements a fallback mechanism, preventing the terminal device from indefinitely selecting a cell based on frequency priority. If it cannot camp on a cell that supports low power for an extended period, the UE can select a cell that meets the first condition but does not support low power, camping on that cell as early as possible and reducing the terminal's cell search time.

[0231] Optionally, the first timer may be started when the terminal device performs a cell search on at least one candidate cell. Alternatively, the terminal device may perform a cell search on at least one candidate cell when the first timer is started. Or, at some point after the first timer is started, the first cell among at least one candidate cell may be selected based on frequency priority. This solution does not impose any restrictions on this.

[0232] In one possible implementation, after the first timer expires, one or more of the following are also included: selecting a first cell from at least one candidate cell without considering frequency priority; performing a cell search on at least one candidate cell based on the aforementioned first condition; or the terminal device entering a state of camping on any cell; or the terminal device remaining in a state of selecting any cell; or the terminal device camping on any suitable cell on a preset RAT. In this example, the terminal can enter a definite state even if no first cell meeting the conditions is found. Furthermore, by designing different UE states, greater flexibility is given to the UE.

[0233] In one possible implementation, the UE further receives at least one indication message indicating at least one of the following: the duration of a first timer, the start rule of the first timer, the start time of the first timer, and the end time of the first timer. Then, the UE performs cell search based on the at least one indication message.

[0234] In one possible implementation, if the UE finds a cell that meets the first condition based on frequency priority, then the cell is a suitable Suitable Cell, and the UE can enter the camped normally state, that is, it can camp on this suitable cell.

[0235] In another possible implementation, if the UE does not find the first cell mentioned above, the UE lowers its requirements and does not perform cell search based on frequency priority. The cell that meets the first condition is the suitable cell (Suitable Cell), and the UE enters the camped normally state, that is, it can camp on this suitable cell.

[0236] In another possible implementation, if the UE does not find the first cell mentioned above, i.e., there is no Suitable Cell, the UE can enter the Camped on Any Cell state.

[0237] In another possible implementation, if the UE does not find the first cell mentioned above, i.e., there is no Suitable Cell, then the UE should remain in the Any Cell Selection state.

[0238] In another possible implementation, if the UE does not find the first cell mentioned above, i.e., there is no suitable cell, then the UE is allowed to camp on any suitable cell on the specified RAT.

[0239] In another possible implementation, a search is first performed based on the first condition. If a cell that meets the first condition is found, and that cell has a high priority or meets the low power consumption characteristics, then cell selection is stopped, the UE camps on the suitable Suitable Cell, and the UE enters the camped normally state.

[0240] In another possible implementation, a search is first performed based on the first condition. If a cell that meets the first condition is found, and the cell has a low priority or does not meet the low power consumption characteristics, then the cell is considered an acceptable cell, but the UE does not camp on it. The cell search continues until a cell with a high priority or that meets the low power consumption characteristics is found. The UE then camps on the suitable suitable cell, and the UE enters the camped normally state.

[0241] In another possible implementation, a search is first performed based on the first condition. If a cell that meets the first condition is found, and the cell has a low priority or does not meet the low power consumption characteristics, then the cell is considered an acceptable cell, but the UE does not camp on it. The cell search continues. If all supported frequency points have been searched and no cell with a high priority or that meets the low power consumption characteristics has been found, then the UE camps on the cell with the largest Srxlev and / or Squal value among one or more Acceptable Cells that meet the first condition.

[0242] In another possible implementation, a search is first performed based on the first condition. If a cell that meets the first condition is found, and if the cell has a low priority or does not meet the low power consumption characteristics, then the cell is considered an acceptable cell, but the UE does not camp on it. The cell search continues. If all supported frequency points have been searched and no cell with a high priority or that meets the low power consumption characteristics has been found, then the UE camps on the cell corresponding to the closest frequency point among one or more acceptable cells that meet the first condition.

[0243] In another possible implementation, a search is first performed based on the first condition. If a cell that meets the first condition is found, and if the cell has a low priority or does not meet the low power consumption characteristics, then the cell is considered an acceptable cell, but the UE does not camp on it. The cell search continues. If all supported frequency points have been searched and no cell with a high priority or that meets the low power consumption characteristics has been found, then the UE camps on the first or last acceptable cell found among one or more acceptable cells that meet the first condition.

[0244] In another possible implementation, a search is first performed based on the first condition. If a cell that meets the first condition is found, and the cell has a low priority or does not meet the low power consumption characteristics, the cell search continues. If all supported frequency points have been searched and no cell with a high priority or that meets the low power consumption characteristics has been found, the UE can enter the Camped on Any Cell state.

[0245] In another possible implementation, a search is first performed based on the first condition. If a cell that meets the first condition is found, and the cell has a low priority or does not meet the low power consumption characteristics, the cell search continues. If all supported frequency points have been searched and no cell with a high priority or that meets the low power consumption characteristics has been found, the UE should remain in the Any Cell Selection state.

[0246] In another possible implementation, a search is first performed based on the first condition. If a cell that meets the first condition is found, and the cell has a low priority or does not meet the low power consumption characteristics, the cell search continues. If no cell with a high priority or that meets the low power consumption characteristics is found after searching all supported frequency points, then the UE is allowed to be camped on any suitable cell on the specified RAT.

[0247] In one possible implementation, the terminal device enables a low-power mechanism, and when the number of cell reselections by the terminal device within a first time interval is less than the cell reselection number threshold, the terminal device selects the first cell from at least one candidate cell based on frequency priority.

[0248] In this example, when the number of cell reselections for the terminal device is small, the cell quality supporting low power consumption is good, and the terminal device can enable low power consumption to achieve terminal energy saving.

[0249] In another possible implementation, the terminal device enables a low-power mechanism, and when the number of cell reselections by the terminal device within a first time interval is greater than the cell reselection threshold, the terminal device does not select the first cell from at least one candidate cell based on frequency priority.

[0250] In this example, when the terminal device performs a large number of cell reselections, the quality of cells supporting low-power features is poor. To avoid the high power consumption caused by the terminal device's high-power receiver (main receiver) frequently waking up to perform cell measurements (such as same-frequency or different-frequency measurements), the terminal device no longer performs cell reselection or cell selection based on the frequency priority of candidate cells. The terminal can disable the low-power mechanism to reduce the additional power consumption caused by switching between different receivers.

[0251] In another possible implementation, the terminal device enables a low-power mechanism, and when the number of cell reselections by the terminal device within a first time interval is greater than the cell reselection number threshold, the terminal device selects the first cell from at least one candidate cell based on the aforementioned first condition.

[0252] In this example, when the terminal device performs many cell reselections, the quality of cells supporting low-power characteristics is poor. To avoid the high power consumption caused by the terminal device's high-power receiver (main receiver) frequently waking up to perform cell measurements (such as same-frequency or different-frequency measurements), the terminal device is not forced to select cells that support low-power characteristics. Therefore, when selecting the first cell, only the first condition needs to be met. There is no longer a need to perform cell reselection or cell selection based on the frequency priority of candidate cells. The terminal can disable the low-power mechanism to reduce the additional power consumption caused by switching between different receivers.

[0253] It should be noted that the steps of indicating frequency priority of network devices shown in Figure 4 are not sequential with steps 401 and 402. The illustration is for illustrative purposes only and does not restrict the order of actions.

[0254] The cell selection method provided in this example selects a first cell from at least one candidate cell based on frequency priority. The first cell has a cell selection receive level value and a cell selection quality value both greater than 0. Selecting the first cell based on frequency priority increases the probability that the UE will camp on a cell supporting low-power characteristics as quickly as possible, which is beneficial for UEs with energy-saving capabilities or energy-saving needs to achieve energy savings.

[0255] Current cell reselection criteria involve parameters such as thresholds, which are defined based on measurements of the synchronization signal block (SSB) or channel state information reference signal (CSI-RS) by the main radio (MR). If the UE uses LP-WUR for measurement, considering that LP-WUR has lower accuracy compared to MR, the thresholds and other parameters defined in existing protocols are no longer suitable for LP-WUR. Furthermore, current cell reselection criteria are quite stringent, making it difficult for the UE to reselect to its desired cell. Therefore, this application provides a cell reselection method that can be adapted to UEs with energy-saving capabilities or energy-saving requirements.

[0256] Referring to Figure 5, a flowchart illustrating a cell reselection method according to an embodiment of this application is shown. Optionally, this method can be applied to the aforementioned communication system, such as the communication system shown in Figure 1. The cell reselection method shown in Figure 5 may include steps 501-502. Steps 501-502 are as follows:

[0257] 501. The terminal device determines at least one candidate cell, the at least one candidate cell including a first cell, the frequency priority of the first cell being higher than the frequency priority of the serving cell.

[0258] The terminal equipment resides in the serving cell. The terminal equipment performs cell measurements, and based on these measurements, at least one candidate cell can be identified. Cell measurements include one or more of the following: inter-frequency neighbor cell measurement, inter-system neighbor cell measurement, neighbor cell measurement, serving cell measurement, intra-frequency measurement, or intra-frequency cell measurement. The frequency point measured by the terminal equipment can be one or more of the following: a frequency point indicated by the network device, a cell indicated by the network device, an inter-frequency point selectable by the terminal equipment, an intra-frequency point selectable by the terminal equipment, or an inter-system frequency point selectable by the terminal equipment.

[0259] When a terminal device performs cell reselection, it can select from at least one candidate cell. In one possible implementation, the frequency priority of the at least one candidate cell is configured by the network device. For example, the frequency priority of the at least one candidate cell is configured by the network device through system information or dedicated signaling.

[0260] In another possible implementation, considering energy-saving requirements, before cell reselection, the priority of at least one candidate cell meeting specific conditions can be adjusted to increase the probability that the terminal device will select a WUS-supporting cell during cell reselection. For example, the priority of cells meeting a first preset condition, which is related to the power consumption of the terminal device, can be adjusted to the highest level. Accordingly, at least one candidate cell includes a first cell, which is the highest priority cell when it meets the first preset condition. It should be noted that if a cell's original priority is the highest and the cell meets the aforementioned first preset condition, then the cell's priority does not need to be adjusted. If a cell does not meet the aforementioned first preset condition, then the cell's priority can be lowered or left unchanged.

[0261] The first preset condition mentioned above can be one condition or multiple conditions. For example, the first preset condition may include one or more of the following: supporting low power consumption characteristics, supporting a certain LP-WUS generation method, supporting a certain receiver signal reception, the terminal device having (significant) energy-saving requirements, supporting energy-saving gain greater than or equal to a certain threshold, supporting load rate greater than or equal to a certain threshold, signal quality greater than or equal to a certain threshold, supporting the lowest frequency, etc.

[0262] When there are multiple first preset conditions, if a cell does not meet all of these conditions, its priority may not be adjusted, or its priority may be lowered. This application does not limit the extent of the priority reduction. For example, the adjustment range can be determined based on the performance indicators met. For instance, a condition may correspond to one or more performance indicators. For a cell that does not meet the first preset condition, if the performance indicator corresponding to the first preset condition is very poor, the priority adjustment range is larger; if the performance indicator corresponding to the first preset condition is only relatively poor, the priority adjustment range is smaller. For example, the cell's priority may be lowered by one level.

[0263] If a cell meets all of these conditions, then the cell's priority is adjusted to the highest priority.

[0264] If a cell meets some of these conditions, its priority can be adaptively increased, but not to the highest level, or the priority may remain unchanged, or even decreased. This application does not limit the magnitude of the priority increase. As mentioned above, the magnitude of the priority adjustment can also be determined based on the performance indicators met. For example, if the performance indicators corresponding to some of the met conditions are poor, the priority adjustment will be smaller; for instance, the cell's priority may be increased by one level. If the performance indicators corresponding to some of the met conditions are better, the priority adjustment will be larger. If the performance indicators corresponding to some of the met conditions are poor and few conditions are met, the cell's priority may be decreased.

[0265] The above three schemes are for situations where the first preset condition is multiple conditions. These three schemes can be used in combination, any two of them can be used in combination, or they can be used individually.

[0266] The aforementioned method involves the terminal device increasing the priority of cells that meet the first preset condition to increase the probability of reselecting a cell that supports low-power characteristics. As an alternative implementation, the terminal device can decrease the priority of cells that meet the second preset condition, which also increases the probability of reselecting a cell that supports low-power characteristics. Accordingly, at least one candidate cell includes a second cell; when the second cell meets the second preset condition, it is the cell with the lowest priority. It should be noted that if a cell's original priority is the lowest and the cell meets the second preset condition, then the cell's priority does not need to be adjusted. If a cell does not meet the second preset condition, then the cell's priority can be increased or not adjusted.

[0267] The second preset condition may include one or more conditions. For example, the second preset condition may include one or more of the following: low power consumption is not supported, signal quality is less than or equal to a certain threshold, the highest supported frequency, etc.

[0268] When there are multiple conditions for the second preset condition, if a cell does not meet all of these conditions, then the priority of that cell may not be adjusted, or the priority of that cell may be increased.

[0269] If a cell meets all of these conditions, then the cell's priority is adjusted to the lowest priority.

[0270] If a cell meets some of these conditions, its priority can be adjusted downwards, but not to the lowest level, or the priority can remain unchanged, or even be increased.

[0271] The above three schemes are for situations where the second preset condition has multiple conditions. These three schemes can be used in combination, any two of them can be used together, or they can be used individually.

[0272] It is understandable that network devices are configured with a priority. For the purposes of this application, the priority configured by the network device can also be considered the original priority. In this embodiment, the terminal device adjusts the priority of the first cell to the highest priority; therefore, the priority of the first cell is higher than the priority configured by the network device. This ensures that the first cell has the highest priority among all candidate cells without changing the priorities of other candidate cells. For example, if the maximum priority configured by the network device is 7, and the first cell is the highest priority cell, its priority can be adjusted to 8, making it the highest priority among all candidate cells.

[0273] It should be noted that the priority configured for network devices can be: the highest priority that the network device can be configured with, or the highest priority that the network device is capable of configuring, or the highest priority that the network device is configured for this cell / frequency point. Here, the highest priority can be the highest cell reselection priority, or the highest cell reselection sub-priority, or the sum of the highest cell reselection priority and the highest cell reselection sub-priority.

[0274] Network devices indicate cell priorities to terminal devices. The terminal device may or may not reselect the cell corresponding to the priority indicated by the network device. The specific information indicated by the network device will vary depending on how the cell priorities are implemented.

[0275] When the cell priority corresponds to an integer value, the network device can indicate the cell reselection priority. For example, the network device can send first information to the terminal device to determine the cell reselection priority. Accordingly, the terminal device, upon receiving the first information, can determine the cell reselection priority. Similarly, when the cell priority corresponds to a decimal value, the network device can indicate the cell reselection sub-priority. For example, the network device can send second information to the terminal device to determine the cell reselection sub-priority. Accordingly, the terminal device, upon receiving the second information, can determine the cell reselection sub-priority. When the cell priority corresponds to a value including both integers and decimals, the network device can indicate the cell priority. For example, the network device can send third information to the terminal device to determine the cell priority. Accordingly, the terminal device, upon receiving the third information, can determine the cell priority. The specific signaling, channel, or signal carrying the first, second, or third information is not limited in the embodiments of this application. For example, the first, second, or third information may be carried in one or more of the following: RRC message, DCI, MAC CE, PDCCH, PDSCH, CSI-RS, demodulation reference signal (DMRS), paging message, short message, random access response (RAR), conflict resolution message (i.e., Msg4 in the random access process), master information block (MIB), system information (SI), system information block (SIB), SSB, PBCH, or TPS.

[0276] The terminal device adjusts the priority of some or all of the candidate cells according to a first preset condition and / or a second preset condition. For example, for a cell that meets all the conditions in the first preset condition, the priority of that cell can be adjusted to the highest priority; for a cell that meets all the conditions in the second preset condition, the priority of that cell can be adjusted to the lowest priority; for a cell that meets some of the conditions in the first preset condition, the priority of that cell can be adjusted to the second highest priority; and for a cell that meets some of the conditions in the second preset condition, the priority of that cell can be adjusted to the second lowest priority.

[0277] 502. When the first cell meets the second condition, the terminal device reselects from the serving cell to the first cell. The second condition includes one or more of the following:

[0278] (1) The first parameter of the first cell is greater than the cell selection quality value of the first cell. The first parameter of the first cell is greater than the cell selection quality value threshold used when performing the first priority RAT / frequency point reselection.

[0279] (2) The second parameter of the first cell is greater than the cell selection reception level value of the first cell. The second parameter of the first cell is greater than the cell selection reception level value threshold used when performing the first priority RAT / frequency point reselection.

[0280] (3) The cell selection quality value of the first cell is greater than the third parameter of the first cell, and the third parameter of the first cell is less than the cell selection quality value threshold used when performing the first priority RAT / frequency reselection.

[0281] (4) The cell selection receive level value of the first cell is greater than the fourth parameter of the first cell, and the fourth parameter of the first cell is less than the cell selection receive level value threshold used when performing the first priority RAT / frequency point reselection.

[0282] In other words, when the first cell meets the above condition (1), the terminal device reselects from the serving cell to the first cell. Or, when the first cell meets the above condition (2), the terminal device reselects from the serving cell to the first cell. Or, when the first cell meets the above condition (3), the terminal device reselects from the serving cell to the first cell. Or, when the first cell meets the above condition (4), the terminal device reselects from the serving cell to the first cell. It can be understood that when the first cell meets any one, any two, any three, or any four of the above conditions, the terminal device reselects from the serving cell to the first cell.

[0283] The cell selection quality threshold used in the first priority RAT / frequency reselection can be, for example, the cell selection quality threshold used in a higher priority RAT / frequency reselection.

[0284] In one possible implementation, the UE has low power capability, or the UE enters a low power mode, or the UE supports LP-WUS features, etc.

[0285] The following is a detailed description of the situation under condition (1) above.

[0286] The cell selection quality value Squal for the first cell can be calculated based on the following formula 1: Cell selection quality value Squal = Q qualmeas –(Q qualmin +Q qualminoffset –Qoffset temp ;(Formula 1)

[0287] Among them, Qqualmeas Q is the measured cell quality value. qualmin Q is the minimum quality value required for the community. qualminoffset Qoffset is the minimum quality offset required for the cell. temp This is a temporary offset value applied to the cell.

[0288] In one possible implementation, the first parameter of the first cell is related to the cell selection quality value of the first cell. This can be understood as the first parameter of the first cell being obtained based on the cell selection quality value of the first cell.

[0289] In one possible implementation, the first parameter of the first cell is the sum of the cell selection quality value of the first cell and a first offset value. The first offset value is greater than 0. For example, the first offset value is predefined. Alternatively, the first offset value can be determined based on network device indications, such as through public or private signaling, or configured by core network devices through non-access stratum (NAS) messages.

[0290] It is understandable that the first parameter of the first cell in this example can also be understood as the updated cell selection quality value of the first cell. This scheme does not impose any restrictions on this.

[0291] For example, the first parameter Squal_PS of the first cell can be calculated based on the following formula 2: First parameter Squal_PS = Q qualmeas –(Q qualmin +Q qualminoffset –Qoffset temp +Squal offset ;(Formula 2)

[0292] Among them, Squal offset This is the first offset value.

[0293] The Squal_PS value is greater than the Thresh threshold for cell selection quality value used when performing higher-priority RAT / frequency reselection. X，HighQ .

[0294] In one possible implementation, when the first cell supports low-power characteristics, the network device sends configuration information to the terminal device, which indicates a first offset value. Then, the terminal device obtains the first parameter of the first cell (i.e., the updated cell selection quality value of the first cell) based on this configuration information. The first parameter of the first cell is greater than the Thresh cell selection quality value threshold used when performing higher-priority RAT / frequency reselection. X，HighQ Subsequently, the terminal device reselects from the serving cell to the first cell.

[0295] In another possible implementation, the first parameter of the first cell is the difference between the cell selection quality value of the first cell and a first offset value. This first offset value is less than 0. For a detailed explanation of this part, please refer to the above description; it will not be repeated here.

[0296] In one possible implementation, when the system information broadcasts the cell selection quality threshold threshServingLowQ used by the terminal in the serving cell for second-priority RAT / frequency reselection, and one second has elapsed since the UE camped in the current serving cell, if the UE enters low-power mode, or the UE has low-power capabilities, then cell reselection on a higher-priority NR frequency or inter-RAT frequency than the serving frequency will be performed under the following conditions:

[0297] Within the TreselectionRAT time interval, cells with higher priority NR or EUTRAN RAT / frequency satisfy Squal_PS>Thresh. X，HighQ .

[0298] The cell selection quality threshold used when performing the second priority RAT / frequency reselection can be, for example, the cell selection quality threshold used when performing the lower priority RAT / frequency reselection.

[0299] In this example, based on the cell reselection condition (1) mentioned above, the first parameter of the first cell is greater than the cell selection quality value threshold used when the first cell performs the first priority RAT / frequency point reselection. This increases the probability that the UE can reselect the first cell, making it more likely that the UE will reselect a cell that supports low power mode, which is beneficial for the UE to save energy.

[0300] The following is a detailed description of the situation under condition (2) above.

[0301] The cell selection receive level value Srxlev of the first cell can be calculated based on the following formula 3: Cell selection receive level value Srxlev = Q rxlevmeas –(Q rxlevmin +Q rxlevminoffset )–P compensation –Qoffset temp ;(Formula 3)

[0302] Among them, Q rxlevmeas Q is the measured cell received signal level. rxlevmin Q is the minimum voltage level required for the cell. rxlevminoffset P is the minimum level offset required for the cell. compensation Qoffset is the level compensation value. tempThis is a temporary offset value applied to the cell.

[0303] In one possible implementation, the second parameter of the first cell is related to the cell selection reception level value of the first cell; that is, the second parameter of the first cell is obtained based on the cell selection reception level value of the first cell.

[0304] In one possible implementation, the second parameter is the sum of the cell selection receive level of the first cell and a second offset value, which is predefined or determined based on network device instructions. This second offset value is greater than 0.

[0305] In one possible implementation, the second parameter of the first cell is the sum of the cell selection received level value of the first cell and a second offset value. This second offset value is greater than 0. For example, the second offset value is predefined. Alternatively, the second offset value can be determined based on network device indications, such as through public or private signaling, or configured by the core network device through Non-Access Stratum (NAS) messages.

[0306] It is understandable that the second parameter of the first cell in this example can also be understood as the updated cell selection receive level value of the first cell. This scheme does not impose any restrictions on this.

[0307] For example, the second parameter Srxlev_PS of the first cell can be calculated based on the following formula 4: Srxlev_PS = Q rxlevmeas –(Q rxlevmin +Q rxlevminoffset )–P compensation –Qoffset temp +Srxlev offset ;(Formula 4)

[0308] Among them, Srxlev offset This is the second offset value.

[0309] The Srxlev_PS is greater than the Thresh threshold value for cell selection received level used when performing higher-priority RAT / frequency reselection. X，HighP .

[0310] In one possible implementation, when the first cell supports low-power characteristics, the network device sends configuration information to the terminal device, which indicates a second offset value. Then, the terminal device obtains the second parameter of the first cell (i.e., the updated cell selection receive level value of the first cell) based on this configuration information. The second parameter of the first cell is greater than the Thresh threshold cell selection receive level value used when performing higher-priority RAT / frequency reselection. X，HighPSubsequently, the terminal device reselects from the serving cell to the first cell.

[0311] In another possible implementation, the second parameter of the first cell is the difference between the cell selection receive level value and a second offset value. This second offset value is less than 0. For a detailed explanation of this part, please refer to the above description; it will not be repeated here.

[0312] In one possible implementation, when the system information broadcasts the cell selection receive level threshold threshServingLowP used by a terminal in the serving cell when performing second-priority RAT / frequency reselection, cell reselection will be performed on a cell with a higher-priority NR frequency or inter-RAT frequency if the following conditions are met:

[0313] Within the TreselectionRAT time interval, cells with higher priority RAT / frequency satisfy Srxlev_PS > Thresh. X，HighP Furthermore, one second has elapsed since the UE has been camped on the current serving cell; and the UE has entered low-power mode or has low-power capability, etc.

[0314] In this example, based on the cell reselection condition (2) mentioned above, the second parameter of the first cell is greater than the cell selection receive level threshold used when the first cell performs first priority RAT / frequency point reselection, thereby increasing the probability that the UE can reselect the first cell.

[0315] The following is a detailed description of the situation under condition (3) above.

[0316] In this implementation, the cell selection quality value of the first cell is greater than a third parameter of the first cell, and the third parameter of the first cell is less than the cell selection quality value threshold used when performing first-priority RAT / frequency reselection. In one possible implementation, the third parameter of the first cell is obtained based on the cell selection quality value threshold used when performing first-priority RAT / frequency reselection. For example, the third parameter of the first cell is the sum of the cell selection quality value threshold used when performing first-priority RAT / frequency reselection and a third offset value. This third offset value is less than 0. Exemplarily, this third offset value is predefined. Alternatively, the third offset value may be determined based on network device indications, such as through public or private signaling, or configured by the core network device through non-access stratum (NAS) messages.

[0317] For example, the third parameter Thresh of the first cell X,HighQ _PS can be calculated based on the following formula 5: Thresh, the third parameter of the first cell. X,HighQ _PS = ThreshX,HighQ +ThreshX,HighQ_offset; (Formula 5)

[0318] Among them, Thresh X,HighQ ThreshX,HighQ_offset is the third offset value used when performing first-priority RAT / frequency reselection, representing the cell selection quality threshold. This third offset value is less than 0.

[0319] That is, the third parameter Thresh of the first cell X,HighQ When the _PS value is less than the Thresh threshold used for first-priority RAT / frequency reselection, the cell selection quality value is less than the threshold value used for Thresh. X,HighQ The third parameter of the first cell in this example can also be understood as the cell selection quality threshold used when performing first-priority RAT / frequency reselection after the first cell is updated. This scheme does not impose any restrictions on this.

[0320] In one possible implementation, when the first cell supports low-power characteristics, the network device sends configuration information to the terminal device, which indicates a third offset value. Then, the terminal device obtains the third parameter of the first cell based on this configuration information (i.e., the cell selection quality threshold value used when the first cell performs a first-priority RAT / frequency reselection after the update). The cell selection quality value of the first cell is greater than the updated cell selection quality threshold value Threshold used when performing a higher-priority RAT / frequency reselection. X,HighQ PS. Subsequently, the terminal device reselects from the serving cell to this first cell.

[0321] In another possible implementation, the third parameter of the first cell is the difference between the cell selection quality value threshold used when performing the first priority RAT / frequency reselection and the third offset value. This third offset value is greater than 0. For a detailed explanation of this part, please refer to the above description; it will not be repeated here.

[0322] In one possible implementation, when the system information broadcasts the cell selection quality threshold threshServingLowQ used by the terminal in the serving cell for second-priority RAT / frequency reselection, and one second has elapsed since the UE camped in the current serving cell, if the UE enters low-power mode, or the UE has low-power capabilities, then cell reselection on a higher-priority NR frequency or inter-RAT frequency than the serving frequency will be performed under the following conditions:

[0323] In time interval T reselectionRAT Within the range, cells with higher priority NR or EUTRAN RAT / frequency satisfy Squal>Thresh. X,HighQ _PS.

[0324] In this example, based on the cell reselection condition (3) mentioned above, the cell selection quality value of the first cell is greater than the third parameter of the first cell. The third parameter of the first cell is less than the cell selection quality value threshold used when performing the first priority RAT / frequency point reselection. This increases the probability that the UE can reselect to the first cell, making it more likely that the UE can reselect to a cell that supports low power mode, which is beneficial for the UE to save energy.

[0325] The following is a detailed description of the situation under condition (4) above.

[0326] In this embodiment, the fourth parameter of the first cell is less than the cell selection receive level threshold used when performing first priority RAT / frequency reselection. In one possible implementation, the fourth parameter of the first cell is obtained based on the cell selection receive level threshold used when performing first priority RAT / frequency reselection. For example, the fourth parameter of the first cell is the sum of the cell selection receive level threshold used when performing first priority RAT / frequency reselection and a fourth offset value. This fourth offset value is less than 0. Exemplarily, this fourth offset value is predefined. Alternatively, the fourth offset value may be determined based on network device indications, such as through public or private signaling by the network device, or configured by the core network device through Non-Access Stratum (NAS) messages.

[0327] For example, the fourth parameter Thresh of the first cell X,HighP _PS can be calculated based on the following formula 6: Thresh, the fourth parameter of the first cell. X,HighP _PS = Thresh X,HighP +ThreshX,HighP_offset; (Formula 6)

[0328] Among them, Thresh X,HighP ThreshX,HighP_offset is the fourth offset value, used for cell selection receive level threshold during first-priority RAT / frequency reselection. This fourth offset value is less than 0.

[0329] That is, the fourth parameter Thresh of the first cell X,HighP When the _PS value is less than the Thresh threshold value used for cell selection reception level value when performing first-priority RAT / frequency reselection,... X,HighP The fourth parameter of the first cell in this example can also be understood as the cell selection receive level threshold used when the first cell performs the first priority RAT / frequency reselection after the update. This scheme does not impose any restrictions on this.

[0330] In one possible implementation, when the first cell supports low-power characteristics, the network device sends configuration information to the terminal device, which indicates a fourth offset value. Then, the terminal device obtains the fourth parameter of the first cell based on this configuration information (i.e., the cell selection receive level threshold used when performing first-priority RAT / frequency point reselection). The cell selection receive level of the first cell is greater than the updated cell selection receive level threshold used when performing higher-priority RAT / frequency point reselection. Subsequently, the terminal device reselects from the serving cell to the first cell.

[0331] In another possible implementation, the fourth parameter of the first cell is the difference between the cell selection receive level threshold used during first priority RAT / frequency reselection and the fourth offset value. This fourth offset value is greater than 0. For a detailed explanation of this part, please refer to the above description; it will not be repeated here.

[0332] In one possible implementation, when the system information broadcasts the cell selection receive level threshold threshServingLowP used by a terminal in the serving cell when performing second-priority RAT / frequency reselection, cell reselection will be performed on a cell with a higher-priority NR frequency or inter-RAT frequency if the following conditions are met:

[0333] In time interval T reselectionRAT Within the range, cells with higher priority RAT / frequency satisfy Srxlev > Thresh. X,HighP _PS; and 1 second has elapsed since the UE has been camped on the current serving cell; and the UE has entered low power mode or has low power capability, etc.

[0334] It should be noted that the steps of indicating frequency priority, first offset value, second offset value, third offset value, fourth offset value and the aforementioned thresholds shown in Figure 5 are not sequential with steps 501 and 502. The illustration is for illustrative purposes only and does not restrict the order of actions.

[0335] In this example, based on the cell reselection condition (4) mentioned above, the cell selection reception level of the first cell is greater than the fourth parameter of the first cell. The fourth parameter of the first cell is less than the cell selection reception level threshold used when performing the first priority RAT / frequency point reselection. This increases the probability that the UE can reselect to the first cell, making it more likely that the UE will reselect to a cell that supports low power mode, which is beneficial for the UE to save energy.

[0336] In this embodiment of the application, based on the second condition described above, by adjusting the cell selection quality value or the cell selection reception level value of the first cell, or by adjusting the cell selection quality value threshold used by the first cell when performing first priority RAT / frequency point reselection, or by adjusting the cell selection reception level value threshold used by the first cell when performing first priority RAT / frequency point reselection, the UE is more likely to reselect to a cell that supports low power mode, which is beneficial for UE energy saving.

[0337] This application embodiment also provides a cell reselection measurement method, which can be adapted to UEs with energy-saving capabilities or energy-saving requirements. Referring to FIG6, it is a flowchart illustrating a cell reselection measurement method provided in this application embodiment. Optionally, this method can be applied to the aforementioned communication system, such as the communication system shown in FIG1. ​​The cell reselection measurement method shown in FIG4 may include step 601. Step 601 is as follows:

[0338] 601. The terminal equipment performs cell measurements; however, when the serving cell meets the third condition, co-frequency measurements are not performed. This third condition includes:

[0339] In this case, the terminal equipment resides in the serving cell. The fifth parameter of the serving cell is greater than the cell selection quality value of the serving cell, and the fifth parameter of the serving cell is greater than the cell selection quality value threshold measured on the same frequency; and the sixth parameter of the serving cell is greater than the cell selection reception level value of the serving cell, and the sixth parameter of the serving cell is greater than the cell selection reception level value threshold measured on the same frequency; or,

[0340] The serving cell's cell selection quality value is greater than the serving cell's seventh parameter, which is less than the cell selection quality value threshold measured in the same frequency, and the serving cell's cell selection received level value is greater than the serving cell's eighth parameter, which is less than the cell selection received level value threshold measured in the same frequency.

[0341] The third condition mentioned above will be explained in detail below.

[0342] First, let's introduce (1) and (2) of the third condition.

[0343] (1) The fifth parameter of the serving cell is greater than the cell selection quality value of the serving cell, and the fifth parameter of the serving cell is greater than the threshold of the cell selection quality value measured in the same frequency.

[0344] (2) The sixth parameter of the serving cell is greater than the cell selection reception level value of the serving cell, and the sixth parameter of the serving cell is greater than the threshold value of the cell selection reception level value measured in the same frequency.

[0345] In other words, if the serving cell simultaneously meets both (1) and (2) of the third condition above, the UE will not perform co-frequency measurement.

[0346] In one possible implementation, the UE has low power capability, or the UE enters a low power mode, or the UE supports LP-WUS features, etc.

[0347] In (1): In one possible implementation, the fifth parameter of the serving cell is related to the cell selection quality value of the serving cell. This can be understood as the fifth parameter of the serving cell being obtained based on the cell selection quality value of the serving cell. In one possible implementation, the fifth parameter of the serving cell is the sum of the cell selection quality value of the serving cell and a fifth offset value, which is greater than 0. For example, the fifth offset value is predefined. Or the fifth offset value is determined based on network device indications, such as by the network device through public or private signaling. Or it is configured by the core network device through non-access stratum (NAS) messages, etc.

[0348] For example, the fifth parameter Squal_PS of the serving cell can be calculated based on the following formula 7: The fifth parameter Squal_PS of the serving cell = Squal + offset1; (Formula 7)

[0349] Here, offset1 is the fifth offset value, which is greater than 0.

[0350] In another possible implementation, the fifth parameter of the serving cell is the difference between the cell selection quality value of the serving cell and the fifth offset value, which is less than 0. For a detailed explanation of this part, please refer to the above description; it will not be repeated here.

[0351] In (2), in one possible implementation, the sixth parameter of the serving cell is related to the cell selection receive level of the serving cell. This can be understood as the sixth parameter of the serving cell being obtained based on the cell selection receive level of the serving cell. In one possible implementation, the sixth parameter is the sum of the cell selection receive level of the serving cell and a sixth offset value, which is greater than 0. For example, the sixth offset value is predefined. Or the sixth offset value is determined based on network device indications, such as through public or private signaling. Or it is configured by the core network device through non-access stratum (NAS) messages.

[0352] For example, the sixth parameter Srxlev_PS of the serving cell can be calculated based on the following formula 8: The sixth parameter Srxlev_PS of the serving cell = Srxlev + offset2; (Formula 8)

[0353] Here, offset2 is the sixth offset value, which is greater than 0. Optionally, this sixth offset value can be the same as or different from the fifth offset value mentioned above; this scheme does not impose any restrictions on this.

[0354] In another possible implementation, the sixth parameter is the difference between the cell selection receive level of the serving cell and the sixth offset value, which is less than 0. For a detailed explanation of this part, please refer to the above description; it will not be repeated here.

[0355] In this example, the measurement rule for cell reselection among cells of the same priority and frequency is: if the serving cell satisfies Srxlev_PS>S IntraSearchP and Squal_PS>S IntraSearchQ Then the UE can choose not to perform co-frequency measurement. Where S IntraSearchP For cells measured at the same frequency, select a threshold value for the received level, S IntraSearchQ Select a quality value threshold for cells measured at the same frequency.

[0356] The following section will introduce conditions (3) and (4) of the third condition.

[0357] (3) The cell selection quality value of the serving cell is greater than the seventh parameter of the serving cell, and the seventh parameter of the serving cell is less than the threshold of the cell selection quality value measured in the same frequency.

[0358] (4) The cell selection received level of the serving cell is greater than the eighth parameter of the serving cell, and the eighth parameter of the serving cell is less than the threshold value of the cell selection received level measured in the same frequency.

[0359] In (3), the seventh parameter of the serving cell is less than the cell selection quality value threshold measured in the same frequency. In one possible implementation, the seventh parameter of the serving cell is obtained based on the cell selection quality value threshold measured in the same frequency. For example, the seventh parameter of the serving cell is the difference between the cell selection quality value threshold measured in the same frequency and a seventh offset value, which is greater than 0. For example, the seventh offset value is predefined. Or the seventh offset value is determined based on network device indications, such as by the network device through public signaling or private signaling. Or it is configured by the core network device through non-access stratum (NAS) messages, etc.

[0360] For example, the seventh parameter S of the serving cell IntraSearchQ _PS can be calculated based on the following formula 9: the seventh parameter S of the serving cell IntraSearchQ _PS=S IntraSearchQ –offset3; (Formula 9)

[0361] Here, offset3 is the seventh offset value, which is greater than 0.

[0362] In another possible implementation, the seventh parameter of the serving cell is the sum of the cell selection quality value threshold measured in the same frequency and the seventh offset value, which is less than 0. For a detailed explanation of this part, please refer to the above description; it will not be repeated here.

[0363] In (4), the eighth parameter of the serving cell is less than the cell selection received level threshold measured in the same frequency. In one possible implementation, the eighth parameter of the serving cell is obtained based on the cell selection received level threshold measured in the same frequency. For example, the eighth parameter of the serving cell is the difference between the cell selection received level threshold measured in the same frequency and an eighth offset value, which is greater than 0. For example, the eighth offset value is predefined. Or the eighth offset value is determined based on network device indication, such as by the network device through public signaling or private signaling. Or it is configured by the core network device through non-access stratum (NAS) messages, etc.

[0364] For example, the eighth parameter S of the serving cell IntraSearchP _PS can be calculated based on the following formula 10: The eighth parameter S of the serving cell IntraSearchP _PS=S IntraSearchP –offset4; (Formula 10)

[0365] Here, offset4 is the eighth offset value, which is greater than 0. Optionally, this eighth offset value can be the same as or different from the seventh offset value mentioned above; this scheme does not impose any restrictions on this.

[0366] In another possible implementation, the eighth parameter of the serving cell is the sum of the cell selection received level threshold measured in the same frequency and the eighth offset value, which is less than 0. For a detailed explanation of this part, please refer to the above description; it will not be repeated here.

[0367] In this example, the measurement rule for cell reselection among cells of the same priority and frequency is: if the serving cell satisfies Srxlev>S IntraSearchP _PS and Squal>S IntraSearchQ If _PS is selected, the UE can choose not to perform co-frequency measurement.

[0368] In one possible implementation, a co-frequency measurement is performed when the serving cell meets a fourth condition, which includes one or more of the following:

[0369] The fifth parameter of the serving cell is greater than the cell selection quality value of the serving cell, and the fifth parameter of the serving cell is less than or equal to the cell selection quality value threshold measured in the same frequency.

[0370] The sixth parameter of the serving cell is greater than the cell selection receive level value of the serving cell, and the sixth parameter of the serving cell is less than or equal to the cell selection receive level value threshold measured in the same frequency.

[0371] The cell selection quality value of the serving cell is less than or equal to the seventh parameter of the serving cell, which is less than the threshold of the cell selection quality value measured in the same frequency.

[0372] The cell selection received signal level of the serving cell is less than or equal to the eighth parameter of the serving cell, which is less than the threshold value of the cell selection received signal level measured in the same frequency.

[0373] The fourth condition mentioned above will be explained in detail below.

[0374] First, let's introduce condition (1) of the fourth condition.

[0375] (1) The fifth parameter of the serving cell is greater than the cell selection quality value of the serving cell, and the fifth parameter of the serving cell is less than or equal to the cell selection quality value threshold measured in the same frequency.

[0376] That is, if the serving cell does not satisfy Squal_PS>S IntraSearchQ If so, the UE will perform co-frequency measurement. For a description of the fifth parameter of the serving cell, please refer to the relevant record in the third condition (1) above, which will not be repeated here.

[0377] The following section will introduce condition (2) of the fourth condition.

[0378] (2) The sixth parameter of the serving cell is greater than the cell selection reception level value of the serving cell, and the sixth parameter of the serving cell is less than or equal to the threshold value of the cell selection reception level value measured in the same frequency.

[0379] That is, if the serving cell does not satisfy Srxlev_PS>S IntraSearchP If so, the UE will perform co-frequency measurement. For an introduction to the sixth parameter of the serving cell, please refer to the relevant record in the third condition (2) above, which will not be repeated here.

[0380] The following section will introduce condition (3) of the fourth condition.

[0381] (3) The cell selection quality value of the serving cell is less than or equal to the seventh parameter of the serving cell, and the seventh parameter is less than the threshold of the cell selection quality value measured in the same frequency.

[0382] That is, if the serving cell does not satisfy Squal>S IntraSearchQ If _PS, then the UE performs co-frequency measurement. For an introduction to the seventh parameter of the serving cell, please refer to the relevant record in the third condition (3) above, which will not be repeated here.

[0383] The following section will introduce condition (4) of the fourth condition.

[0384] (4) The cell selection received level value of the serving cell is less than or equal to the eighth parameter of the serving cell, and the eighth parameter is less than the threshold value of the cell selection received level value measured in the same frequency.

[0385] That is, if the serving cell does not satisfy Srxlev>S IntraSearchP If _PS, then the UE performs co-frequency measurement. For an introduction to the eighth parameter of the serving cell, please refer to the relevant record in the third condition (4) above, which will not be repeated here.

[0386] It should be noted that the steps of the network device indicating the fifth offset value, the sixth offset value, the seventh offset value, the eighth offset value, and the aforementioned thresholds shown in Figure 6 are not sequential with step 601. The illustration is for illustrative purposes only and does not restrict the order of actions.

[0387] In this embodiment, the serving cell's cell selection quality value or cell selection reception level value is increased to make it more likely to exceed the threshold for existing protocol-adapted MR; or the threshold for the cell selection reception level value measured in the same frequency is decreased to make it more likely for the serving cell's cell selection quality value or cell selection reception level value to exceed the threshold. In this way, the UE can perform better cell reselection during low-power mode operation, allowing the UE to reselect to a more suitable cell, which is beneficial for UE energy saving.

[0388] It should be noted that the embodiments of this application use the cell reselection measurement method of cells with the same priority and frequency as an example for introduction. Of course, the cell reselection measurement method provided in the embodiments of this application can also be applied to the cell reselection measurement of cells with the same priority but different frequencies and cells with lower priority but different frequencies or different systems, etc., and this solution does not limit it in this regard.

[0389] This application embodiment also provides a communication method that enables the UE to exit the LP-WUS mechanism. Referring to FIG7, a flowchart of a communication method provided by this application embodiment is shown. Optionally, this method can be applied to the aforementioned communication system, such as the communication system shown in FIG1. ​​The communication method shown in FIG7 may include step 701. Step 701 is as follows:

[0390] 701. When the number of cell reselections of the terminal device is greater than or equal to the cell reselection number threshold, or when the terminal device enters a high-speed mobile state, the terminal device exits the low power mode.

[0391] In other words, LP-WUS is not suitable for high-mobility scenarios. When the UE performs cell reselection too frequently, it will exit the LP-WUS mechanism.

[0392] Among these, the terminal device enables the low-power mechanism. This "enable" can also be understood as "activate", "enter", "support", "UE monitors low-power wake-up signal", "UE monitors low-power signal", etc.

[0393] In one possible implementation, the enabling low-power mechanism includes one or more of the following: activating the low-power mechanism, entering the low-power mechanism, supporting the monitoring of low-power signals, the UE monitoring low-power wake-up signals, etc.

[0394] In one possible implementation, if the number of cell reselections by the terminal device within a preset time period is greater than or equal to a cell reselection frequency threshold, the terminal device exits the low-power mode. This preset time period can be predefined or configured by the network device. For example, the preset time period is the time cycle TCRmax.

[0395] In one possible implementation, the cell reselection count threshold is predefined, or it is determined based on instructions from the network device. For example, the cell reselection count threshold is NCR_H.

[0396] In one possible implementation, the exit from the low-power mechanism includes one or more of the following: deactivating the low-power mechanism, disabling the low-power mechanism, not supporting the monitoring of low-power signals, waking up the main receiver of the terminal device, or waking up the higher-power receiver of the terminal device. In one possible implementation, the low-power signal includes a low-power wake-up signal.

[0397] It should be noted that the steps in Figure 7, such as the network device indicating the cell reselection threshold and duration, are not sequential with step 701. The illustration is for illustrative purposes only and does not restrict the order of actions.

[0398] This example demonstrates how, in high UE mobility scenarios, the delay caused by cell reselection is reduced by minimizing the significant wake-up latency introduced by the MR being in a deep sleep state after the UE enters the LP-WUR.

[0399] It should be noted that, in the various embodiments of this application, unless otherwise specified or logically conflicting, the terminology and / or descriptions between the embodiments are consistent and can be mutually referenced. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships. For example, the embodiment shown in FIG4 can be used in combination with one or more of the embodiments shown in FIG5, FIG6, and FIG7. Similarly, the embodiment shown in FIG5 can be used in combination with one or more of the embodiments shown in FIG4, FIG6, and FIG7. Likewise, the embodiment shown in FIG6 can be used in combination with one or more of the embodiments shown in FIG4, FIG5, and FIG7. And so on.

[0400] It should be noted that in the various embodiments of this application, different parameters (such as offset values, time intervals, etc. of (one or more of the first, second, third, fourth, fifth, sixth, seventh, eighth, etc.) can be determined by the network through the same indication information or different indication information.

[0401] It should be noted that in the various embodiments of this application, for the parameters configured by the network device for the terminal device (such as offset values, time intervals, etc., of one or more of the first, second, third, fourth, fifth, sixth, seventh, and eighth parameters), the parameters are reported to the base station or the core network through UE capabilities or UE auxiliary information. Specifically, if the UE reports to the core network, the core network needs to send it to the base station, and the base station then sends it to the UE. If the UE reports to the base station, the base station directly sends it to the UE.

[0402] The methods of the embodiments of this application have been described in detail above, and the apparatus of the embodiments of this application is provided below. It is understood that the division of multiple units or modules in the various apparatus embodiments of this application is only a logical division based on function and is not intended to limit the specific structure of the apparatus. In specific implementations, some functional modules may be subdivided into more smaller functional modules, and some functional modules may be combined into a single functional module. However, regardless of whether these functional modules are subdivided or combined, the general flow executed by the apparatus is the same. For example, some apparatuses include a receiving unit and a transmitting unit. In some designs, the transmitting unit and the receiving unit can also be integrated into a communication unit, which can implement the functions implemented by the receiving unit and the transmitting unit. Typically, each unit corresponds to its own program code (or program instructions). When the program code corresponding to each unit runs on the processor, it causes the unit to be controlled by the processing unit to execute the corresponding flow and thus achieve the corresponding function.

[0403] This application also provides an apparatus for implementing any of the above methods. For example, a cell selection apparatus is provided, including modules (or means) for implementing the steps performed by the terminal device in any of the above methods.

[0404] For example, referring to FIG8, which is a schematic diagram of a cell selection device provided in an embodiment of this application, the cell selection device is used to implement the aforementioned cell selection method, such as the cell selection method shown in FIG4.

[0405] As shown in Figure 8, the device may include a first processing module 801 and a second processing module 802, as detailed below:

[0406] The first processing module 801 is used to perform cell search on at least one candidate cell;

[0407] The second processing module 802 is used to select a first cell from at least one candidate cell based on frequency priority. The first cell satisfies a first condition, which includes that the cell selection received level value and the cell selection quality value of the first cell are both greater than 0.

[0408] For a description of each of the above modules, please refer to the description in the foregoing embodiments, which will not be repeated here.

[0409] For example, this application also provides a cell reselection device including modules (or means) for implementing the steps performed by the terminal device in any of the above methods.

[0410] For example, referring to FIG8, which is a schematic diagram of a cell reselection device provided in an embodiment of this application, the cell reselection device is used to implement the aforementioned cell reselection method, such as the cell reselection method shown in FIG5.

[0411] As shown in Figure 8, the device may include a first processing module 801 and a second processing module 802, as detailed below:

[0412] The first processing module 801 is used to determine at least one candidate cell, the at least one candidate cell including a first cell, the frequency priority of the first cell being higher than the frequency priority of the serving cell;

[0413] The second processing module 802 is configured to reselect from the serving cell to the first cell when the first cell meets a second condition, wherein the second condition includes one or more of the following:

[0414] (1) The first parameter of the first cell is greater than the cell selection quality value of the first cell, and the first parameter of the first cell is greater than the cell selection quality value threshold used when performing the first priority RAT / frequency point reselection;

[0415] (2) The second parameter of the first cell is greater than the cell selection reception level value of the first cell, and the second parameter of the first cell is greater than the cell selection reception level threshold value used when performing the first priority RAT / frequency point reselection;

[0416] (3) The cell selection quality value of the first cell is greater than the third parameter of the first cell, and the third parameter of the first cell is less than the cell selection quality value threshold used when performing the first priority RAT / frequency point reselection.

[0417] (4) The cell selection reception level value of the first cell is greater than the fourth parameter of the first cell, and the fourth parameter of the first cell is less than the cell selection reception level threshold used when performing the first priority RAT / frequency point reselection.

[0418] For a description of each of the above modules, please refer to the description in the foregoing embodiments, which will not be repeated here.

[0419] For example, this application also provides a cell reselection measurement device including modules (or means) for implementing the steps performed by the terminal device in any of the above methods.

[0420] For example, referring to FIG9, which is a schematic diagram of a cell reselection measurement device provided in an embodiment of this application, this cell reselection measurement device is used to implement the aforementioned cell reselection measurement method, such as the cell reselection measurement method shown in FIG6.

[0421] As shown in Figure 9, the device may include a processing module 901, as detailed below:

[0422] Processing module 901 is used to perform cell measurements; wherein, when the serving cell meets a third condition, co-frequency measurements are not performed, the third condition including:

[0423] The serving cell's fifth parameter is greater than the serving cell's cell selection quality value, the serving cell's fifth parameter is greater than the cell selection quality value threshold measured in the same frequency, and the serving cell's sixth parameter is greater than the serving cell's cell selection reception level value, the serving cell's sixth parameter is greater than the cell selection reception level value threshold measured in the same frequency; or, the serving cell's cell selection quality value is greater than the serving cell's seventh parameter, the serving cell's seventh parameter is less than the cell selection quality value threshold measured in the same frequency, and the serving cell's cell selection reception level value is greater than the serving cell's eighth parameter, the serving cell's eighth parameter is less than the cell selection reception level value threshold measured in the same frequency.

[0424] For a description of each of the above modules, please refer to the description in the foregoing embodiments, which will not be repeated here.

[0425] For example, this application also provides a communication device including a module (or means) for implementing the steps performed by the terminal device in any of the above methods.

[0426] For example, referring to FIG9, which is a schematic diagram of a communication device provided in an embodiment of this application, the communication device is used to implement the aforementioned communication method, such as the communication method shown in FIG7.

[0427] As shown in Figure 9, the device may include a processing module 901, as detailed below:

[0428] The processing module 901 is used to exit the low-power mechanism when the number of cell reselections of the terminal device is greater than or equal to the cell reselection number threshold, or when the terminal device enters a high-speed mobile state.

[0429] For a description of each of the above modules, please refer to the description in the foregoing embodiments, which will not be repeated here.

[0430] It should be understood that the division of modules in the above devices is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, modules in a communication device can be implemented by a processor calling software; for example, a communication device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of each module in the device. The processor can be, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the modules in the device can be implemented as hardware circuits. The functionality of some or all units can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC), and the functionality of some or all of the above units is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using a programmable logic device (PLD), such as a field-programmable gate array (FPGA), which can include a large number of logic gates. The connection relationships between the logic gates are configured through configuration files, thereby achieving the functionality of some or all of the above units. All modules of the above device can be implemented entirely through processor-called software, entirely through hardware circuits, or partially through processor-called software with the remaining parts implemented through hardware circuits.

[0431] Referring to FIG10, a hardware structure diagram of another communication device provided in an embodiment of this application is shown. The communication device 1000 shown in FIG10 includes one or more processors 1001 (a processor is illustrated in the figure).

[0432] Processor 1001 is a circuit with signal processing capabilities. In one implementation, processor 1001 can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), microprocessor, graphics processing unit (GPU) (which can be understood as a type of microprocessor), or digital signal processor (DSP). In another implementation, processor 1001 can implement certain functions through the logical relationships of hardware circuits. These logical relationships of hardware circuits are fixed or reconfigurable. For example, processor 1001 can be a hardware circuit implemented as an ASIC or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and configuring the hardware circuit can be understood as the process of the processor loading instructions to implement the functions of some or all of the above modules. Furthermore, it can also be a hardware circuit designed for artificial intelligence, which can be understood as a type of ASIC, such as a neural network processing unit (NPU), tensor processing unit (TPU), or deep learning processing unit (DPU). The processor 1001 is used to execute related programs to implement the functions required by the units in the communication device of this application embodiment, or to execute the communication method of this application method embodiment.

[0433] Optionally, the communication device 1000 may also include a memory (e.g., memory 1003, memory 1004, memory 1005) (shown as dashed lines in the figure). The memory is used to store instructions executed by the processor 1001, or to store input data required by the processor 1001 to execute instructions, or to store data generated after the processor 1001 executes instructions.

[0434] Optionally, the memory may be located within the one or more processors (e.g., memory 1003), or outside the one or more processors (e.g., memory 1004, memory 1005), or may include a storage portion located within the one or more processors and a storage portion located outside the one or more processors.

[0435] In this embodiment, the memory (e.g., memory 1003, memory 1004, memory 1005) may include, but is not limited to, cache, read-only memory (ROM), random access memory (RAM), synchronous dynamic random access memory (SDRAM), hard disk drive (HDD) or solid-state drive (SSD), erasable programmable read-only memory (EPROM), or compact disc read-only memory (CD-ROM), etc. Memory is any other medium capable of carrying or storing desired program code having an instruction or data structure form and accessible by a computer, but is not limited thereto. The memory in this embodiment may also be a circuit or any other device capable of implementing storage functions for storing computer programs or instructions, and / or data.

[0436] Optionally, the communication device 1000 may further include a communication interface 1002 (shown as a dashed line in the figure). The processor 1001 and the communication interface 1002 are coupled to each other. The communication interface 1002 may be a transceiver or interface circuit, bus, module, or other type of communication interface.

[0437] The memory can store programs. When the program stored in the memory is executed by the processor 1001, the processor 1001 and the communication interface 1002 are used to execute the various steps of the communication method of the embodiments of this application.

[0438] As can be seen, each module in the above device can be one or more processors (or processing circuits) configured to implement the above methods, such as: CPU, GPU, NPU, TPU, DPU, microprocessor, DSP, ASIC, FPGA, or a combination of at least two of these processor forms or a portion of the processing circuits in these processors.

[0439] Furthermore, the modules in the above devices can be integrated in whole or in part, or they can be implemented independently. In one implementation, these modules are integrated together as a system-on-a-chip (SOC). The SOC may include at least one processor for implementing any of the above methods or for implementing the functions of the modules of the device. The at least one processor may be of different types, such as CPU and FPGA, CPU and artificial intelligence processor, CPU and GPU, etc.

[0440] It should be noted that although the device 1000 shown in Figure 10 only illustrates the memory, processor, and communication interface, those skilled in the art should understand that in specific implementations, device 1000 may also include other devices necessary for normal operation. Furthermore, depending on specific needs, those skilled in the art should understand that device 1000 may also include hardware devices for implementing other additional functions. Moreover, those skilled in the art should understand that device 1000 may only include the devices necessary for implementing the embodiments of this application, and not necessarily all the devices shown in Figure 10.

[0441] This application also provides a computer-readable storage medium storing instructions that, when executed on a computer or processor, cause the computer or processor to perform one or more steps of any of the above methods.

[0442] This application also provides a computer program product containing instructions. When the computer program product is run on a computer or processor, it causes the computer or processor to perform one or more steps of any of the methods described above.

[0443] It is understood that in this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing a certain instruction information to indicate A, it can be understood that the instruction information carries A, directly indicates A, or indirectly indicates A. In this application, the information indicated by the instruction information is called the information to be instructed. In specific implementation, there are many ways to indicate the information to be instructed, such as, but not limited to, directly indicating the information to be instructed, such as the information to be instructed itself or its index, or indirectly indicating the information to be instructed by indicating other information, wherein there is an association between the other information and the information to be instructed. It is also possible to indicate only a part of the information to be instructed, while the other parts of the information to be instructed are known or agreed upon in advance. For example, the instruction of specific information can also be achieved by using the arrangement order of various information in advance (e.g., as specified by a protocol), thereby reducing the instruction overhead to a certain extent. The information to be instructed can be sent as a whole or divided into multiple sub-information to be sent separately, and the sending period and / or sending time of these sub-information can be the same or different. This application does not limit the specific sending method. The sending period and / or timing of these sub-information messages can be predefined, for example, according to a protocol, or configured by the transmitting device by sending configuration information to the receiving device.

[0444] The term "at least one" as used in this application refers to one or more items. "Multiple items" means two or more items. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. Furthermore, it should be understood that although the terms "first," "second," etc., may be used to describe objects in this application, these objects should not be limited to these terms. These terms are only used to distinguish the objects from each other. "One or more of the following" or similar expressions are used to indicate any combination of the listed items; for example, at least one of A, B, and / or C can represent: A alone, B alone, C alone, A and B simultaneously, B and C simultaneously, A and C simultaneously, and A, B, and C simultaneously, where A, B, and C can be single or multiple.

[0445] The terms "comprising" and "having," and any variations thereof, used in this application as described below, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include other steps or units not listed, or optionally include other steps or units inherent to such processes, methods, products, or apparatus. It should be noted that in this application, words such as "exemplary" or "for example" are used to indicate illustrative, exemplary, or descriptive purposes. Any method or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other methods or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0446] In the embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the division of units is merely a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. The coupling, direct coupling, or communication connection shown or discussed between each other may be indirect coupling or communication connection through some interfaces, apparatuses, or units, and may be electrical, mechanical, or other forms.

[0447] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0448] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. This computer program product includes one or more computer instructions. When these computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in or transmitted through a computer-readable storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available media can be read-only memory (ROM), random access memory (RAM), or magnetic media, such as floppy disks, hard disks, magnetic tapes, magnetic disks, or optical media, such as digital versatile discs (DVDs), or semiconductor media, such as solid-state disks (SSDs).

[0449] The above description is merely a specific implementation of the embodiments of this application, but the protection scope of the embodiments of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiments of this application should be covered within the protection scope of the embodiments of this application. Therefore, the protection scope of the embodiments of this application should be determined by the protection scope of the claims.

Claims

1. A method for selecting a cell, characterized in that, The method includes: Perform a cell search on at least one candidate cell; The first cell among the at least one candidate cells is selected based on frequency priority. The first cell satisfies a first condition, which includes that the cell selection received level value and the cell selection quality value of the first cell are both greater than 0.

2. The method according to claim 1, characterized in that, The first cell is the cell with the highest frequency priority among the at least one candidate cells that meets the first condition.

3. The method according to claim 1 or 2, characterized in that, The first cell is the cell with the highest frequency priority among the at least one candidate cells, and / or the frequency priority of the first cell is higher than or equal to the highest frequency priority that the network device can configure.

4. The method according to any one of claims 1 to 3, characterized in that, The first cell supports low power consumption.

5. The method according to any one of claims 1 to 4, characterized in that, The frequency priority of the at least one candidate cell that does not support low-power characteristics is configured by the network device.

6. The method according to any one of claims 1 to 5, characterized in that, The method further includes: Start the first timer; The selection of the first cell from the at least one candidate cells based on frequency point priority includes: Before the first timer expires, the first cell among the at least one candidate cells is selected based on the frequency priority.

7. The method according to claim 6, characterized in that, After the first timer expires, the method further includes one or more of the following: The first cell among the at least one candidate cells is not selected based on the frequency priority; or, Based on the first condition, perform a cell search on at least one candidate cell; or... The terminal device enters a state where it can reside in any cell. or, The terminal device remains in any cell selection state; or, The terminal device can reside in any suitable cell on the preset RAT.

8. The method according to claim 6 or 7, characterized in that, The method further includes: Receive at least one indication message, the at least one indication message indicating at least one of the following: the duration of the first timer, the start rule of the first timer, the start time of the first timer, and the end time of the first timer.

9. The method according to any one of claims 1 to 8, characterized in that, Terminal devices support low power consumption.

10. The method according to claims 1 to 9, characterized in that, Enabling a low-power mechanism on a terminal device, wherein selecting a first cell from the at least one candidate cells based on frequency priority includes: When the number of cell reselections by the terminal device within the first time interval is less than the cell reselection threshold, the first cell among the at least one candidate cells is selected based on the frequency priority; and / or, When the number of cell reselections by the terminal device within the first time interval exceeds the cell reselection threshold, the first cell among the at least one candidate cells is not selected based on the frequency priority; and / or, When the number of cell reselections by the terminal device within the first time interval is greater than the cell reselection threshold, the first cell among the at least one candidate cells is selected based on the first condition.

11. A cell reselection method, characterized in that, The method includes: At least one candidate cell is determined, the at least one candidate cell including a first cell, the frequency priority of the first cell being higher than the frequency priority of the serving cell; When the first cell meets the second condition, the cell is reselected from the serving cell to the first cell, wherein the second condition includes one or more of the following: (1) The first parameter of the first cell is greater than the cell selection quality value of the first cell, and the first parameter of the first cell is greater than the cell selection quality value threshold used when performing the first priority RAT / frequency point reselection. (2) The second parameter of the first cell is greater than the cell selection receive level value of the first cell, and the second parameter of the first cell is greater than the cell selection receive level value threshold used when performing the first priority RAT / frequency point reselection. (3) The cell selection quality value of the first cell is greater than the third parameter of the first cell, and the third parameter of the first cell is less than the cell selection quality value threshold used when performing the first priority RAT / frequency point reselection. (4) The cell selection reception level value of the first cell is greater than the fourth parameter of the first cell, and the fourth parameter of the first cell is less than the cell selection reception level value threshold used when performing the first priority RAT / frequency point reselection.

12. The method according to claim 11, characterized in that, The first parameter is the sum of the cell selection quality value of the first cell and a first offset value, wherein the first offset value is predefined or determined based on network device instructions; and / or, The second parameter is the sum of the cell selection receive level value of the first cell and a second offset value, wherein the second offset value is predefined or determined based on an instruction from the network device; and / or, The third parameter is the difference between the cell selection quality value threshold used when performing the first priority RAT / frequency reselection and the third offset value, wherein the third offset value is predefined or determined based on the network device indication; and / or, The fourth parameter is the difference between the cell selection receive level threshold used when performing the first priority RAT / frequency point reselection and the fourth offset value, which is predefined or determined based on the network device indication.

13. The method according to claim 12, characterized in that, The first offset value, the second offset value, the third offset value, and the fourth offset value are all greater than 0.

14. The method according to any one of claims 11 to 13, characterized in that, During the first time interval, the first cell satisfies the second condition, and the terminal device resides in the serving cell for a period exceeding a preset duration.

15. The method according to claim 14, characterized in that, If the first cell satisfies condition (1) or (3) of the second condition, the method further includes: Receive first information, which indicates the cell selection quality value threshold used by the terminal device in the serving cell when performing second priority RAT / frequency reselection.

16. The method according to any one of claims 11 to 15, characterized in that, Before reselecting from the serving cell to the first cell, the method further includes: Perform cell measurements; wherein, when the serving cell meets a third condition, in-frequency measurements are not performed, the third condition including: The fifth parameter of the serving cell is greater than the cell selection quality value of the serving cell, the fifth parameter of the serving cell is greater than the cell selection quality value threshold measured on the same frequency, and the sixth parameter of the serving cell is greater than the cell selection reception level value of the serving cell, the sixth parameter of the serving cell is greater than the cell selection reception level value threshold measured on the same frequency; or, The serving cell's cell selection quality value is greater than the serving cell's seventh parameter, the serving cell's seventh parameter is less than the cell selection quality value threshold measured in the same frequency, and the serving cell's cell selection received level value is greater than the serving cell's eighth parameter, the serving cell's eighth parameter is less than the cell selection received level value threshold measured in the same frequency.

17. The method according to claim 16, characterized in that, The cell measurement process further includes performing co-frequency measurement when the serving cell meets a fourth condition, wherein the fourth condition includes one or more of the following: The fifth parameter of the serving cell is greater than the cell selection quality value of the serving cell, and the fifth parameter of the serving cell is less than or equal to the cell selection quality value threshold measured in the same frequency. The sixth parameter of the serving cell is greater than the cell selected receive level value of the serving cell, and the sixth parameter of the serving cell is less than or equal to the threshold value of the cell selected receive level value measured in the same frequency. The cell selection quality value of the serving cell is less than or equal to the seventh parameter of the serving cell, and the seventh parameter of the serving cell is less than the cell selection quality value threshold of the co-frequency measurement. The cell selection received level value of the serving cell is less than or equal to the eighth parameter of the serving cell, and the eighth parameter is less than the threshold value of the cell selection received level value measured in the same frequency.

18. The method according to claim 17, characterized in that, The fifth parameter of the serving cell is the sum of the cell selection quality value and a fifth offset value, wherein the fifth offset value is predefined or determined based on network device indications; and / or, The sixth parameter of the serving cell is the sum of the cell selection received level value and the sixth offset value of the serving cell, wherein the sixth offset value is predefined or determined based on the indication of the network device; And / or, The seventh parameter of the serving cell is the difference between the cell selection quality value threshold measured in the same frequency and the seventh offset value, wherein the seventh offset value is predefined or determined based on the network device indication; And / or, The eighth parameter of the serving cell is the difference between the cell selection received level threshold value measured in the same frequency and the eighth offset value, which is predefined or determined based on the network device indication.

19. The method according to claim 18, characterized in that, The fifth offset value, the sixth offset value, the seventh offset value, and the eighth offset value are all greater than 0.

20. A method for measuring cell reselection, characterized in that, The method includes: Perform cell measurements; wherein, when the serving cell meets a third condition, in-frequency measurements are not performed, the third condition including: The fifth parameter of the serving cell is greater than the cell selection quality value of the serving cell, the fifth parameter of the serving cell is greater than the cell selection quality value threshold measured on the same frequency, and the sixth parameter of the serving cell is greater than the cell selection reception level value of the serving cell, the sixth parameter of the serving cell is greater than the cell selection reception level value threshold measured on the same frequency; or, The serving cell's cell selection quality value is greater than the serving cell's seventh parameter, the serving cell's seventh parameter is less than the cell selection quality value threshold measured in the same frequency, and the serving cell's cell selection received level value is greater than the serving cell's eighth parameter, the serving cell's eighth parameter is less than the cell selection received level value threshold measured in the same frequency.

21. The method according to claim 20, characterized in that, The method further includes: When the serving cell meets the fourth condition, a co-frequency measurement is performed, the fourth condition including one or more of the following: The fifth parameter of the serving cell is greater than the cell selection quality value of the serving cell, and the fifth parameter of the serving cell is less than or equal to the cell selection quality value threshold measured in the same frequency. The sixth parameter of the serving cell is greater than the cell selected receive level value of the serving cell, and the sixth parameter of the serving cell is less than or equal to the threshold value of the cell selected receive level value measured in the same frequency. The cell selection quality value of the serving cell is less than or equal to the seventh parameter of the serving cell, and the seventh parameter is less than the cell selection quality value threshold of the co-frequency measurement. The cell selection received level value of the serving cell is less than or equal to the eighth parameter of the serving cell, and the eighth parameter is less than the threshold value of the cell selection received level value measured in the same frequency.

22. The method according to claim 20 or 21, characterized in that, The fifth parameter is the sum of the cell selection quality value of the serving cell and the fifth offset value, wherein the fifth offset value is predefined or determined based on network device indications; and / or, The sixth parameter is the sum of the cell selection received level value of the serving cell and the sixth offset value, wherein the sixth offset value is predefined or determined based on the indication of the network device; and / or, The seventh parameter is the difference between the cell selection quality value threshold of the co-frequency measurement and the seventh offset value, wherein the seventh offset value is predefined or determined based on the network device indication; and / or, The eighth parameter is the difference between the cell selection received level threshold value and the eighth offset value measured in the same frequency. The eighth offset value is predefined or determined based on the network device indication.

23. The method according to claim 22, characterized in that, The fifth offset value, the sixth offset value, the seventh offset value, and the eighth offset value are all greater than 0.

24. A communication method, characterized in that, The method for enabling low-power mechanisms in terminal devices includes: The low-power mechanism is exited when the number of cell reselections by the terminal device is greater than or equal to the cell reselection threshold, or when the terminal device enters a high-speed mobile state.

25. The method according to claim 24, characterized in that, The step of exiting the low-power mechanism when the number of cell reselections by the terminal device is greater than or equal to the cell reselection number threshold includes: If the number of cell reselections by the terminal device within a preset time period is greater than or equal to the cell reselection number threshold, the low-power mechanism is exited.

26. The method according to claim 24 or 25, characterized in that, The low-power enabling mechanism includes one or more of the following: activating the low-power mechanism, entering the low-power mechanism, and supporting the monitoring of low-power signals.

27. The method according to any one of claims 24 to 26, characterized in that, Exiting the low-power mechanism includes one or more of the following: deactivating the low-power mechanism, disabling the low-power mechanism, not supporting the monitoring of low-power signals, waking up the main receiver of the terminal device, and waking up the higher-power receiver of the terminal device.

28. A communication device, characterized in that, The device includes a processor configured to perform the method as described in any one of claims 1-27 by executing a computer program or computer-executable instructions stored in a memory, and / or by logic circuitry.

29. A computer-readable storage medium, characterized in that, The system contains a computer program that, when executed by a processor, causes the method described in any one of claims 1-27 to be implemented.

30. A computer program product comprising instructions that, when run on a processor, cause the method as described in any one of claims 1-27 to be implemented.

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