Method, device and system for obtaining transmission parameters

Abstract

The present invention provides a method, apparatus, and system for obtaining transmission parameters, which relate to the field of communications technology and are beneficial for improving the reliability of communication systems. The method includes: a terminal device obtaining transmission parameters of a network device, where the transmission parameters are used to indicate the location information of the network device; the terminal device determining, based on the transmission parameters, a cell reselection intra-frequency and / or inter-frequency measurement threshold; or, based on the transmission parameters, a radio link failure threshold; or, based on the transmission parameters, a connection state intra-frequency and / or inter-frequency measurement threshold.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular to a method, device and system for obtaining transmission parameters. Background Art

[0002] In existing communication systems, terminal devices perform mobility management based on cell reselection, cell switching, and wireless link failure recovery processes. When a terminal device is in an idle state, the terminal device can trigger measurements based on the cell priority of the cell currently providing service (referred to as the serving cell), the cell priority of the neighboring cell, and the cell reselection measurement threshold, and then perform cell reselection. When a terminal device is in a connected state, the terminal device can trigger measurements based on the channel status of the serving cell and the connection state measurement threshold, and then perform cell switching. The terminal device can also trigger the wireless link failure recovery process based on the channel status of the serving cell and the wireless link failure threshold, and then restore the connection with the serving cell or establish a connection with a new cell.

[0003] For places where base stations cannot be deployed, such as the ocean, desert, and air, non-terrestrial networks (NTNs) have been introduced. By deploying base stations or part of base station functions on flying platforms such as satellites, they provide seamless coverage for terminal devices and improve the reliability of the communication system.

[0004] However, compared with terrestrial networks (TN), since satellites are constantly moving, when the distance between the satellite and the terminal device changes, the channel state corresponding to the terminal device will change more drastically, affecting processes such as cell reselection or cell handover, and reducing the reliability of the communication system. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a method, device and system for obtaining transmission parameters, which are conducive to improving the reliability of the communication system.

[0006] In the first aspect, an embodiment of the present application provides a method for obtaining transmission parameters, the method comprising: a terminal device obtains the transmission parameters of a network device, the transmission parameters being used to indicate location information of the network device; the terminal device determines a cell reselection co-frequency and / or hetero-frequency measurement threshold based on the transmission parameters; or, the terminal device determines a wireless link failure threshold based on the transmission parameters; or, the terminal device determines a connection state co-frequency and / or hetero-frequency measurement threshold based on the transmission parameters.

[0007] Based on the first aspect, the terminal device can dynamically determine the cell reselection co-frequency and / or inter-frequency measurement threshold, the radio link failure threshold, or the connected state co-frequency and / or inter-frequency measurement threshold based on the location information of the network device. By appropriately adopting different thresholds in different network device location scenarios, the terminal device can avoid triggering cell reselection co-frequency and / or inter-frequency measurements, connected state co-frequency and / or inter-frequency measurements, or detecting radio link failure too early or too late. This improves the reliability of the communication system while also facilitating energy conservation in the terminal device.

[0008] In one possible design, the transmission parameters include the distance between the terminal device and the network device, and the terminal device determines the cell reselection co-frequency and / or inter-frequency measurement threshold based on the transmission parameters, including: if the change in distance per unit time is less than or equal to a first threshold, the terminal device uses the first threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold; or, if the change in distance per unit time is greater than the first threshold, the terminal device uses the second threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold; wherein the first threshold is less than the second threshold.

[0009] Based on this possible design, when the distance between the terminal device and the network device becomes smaller and smaller, the terminal device can use a first threshold with a lower threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold to avoid the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement too early, which is beneficial to energy saving of the terminal device; when the distance between the terminal device and the network device becomes larger and larger, the second threshold with a higher threshold is used as the cell reselection co-frequency and / or inter-frequency measurement threshold to avoid the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement too late, thereby improving the reliability of the communication system.

[0010] In one possible design, the transmission parameters include the elevation angle of the network device relative to the center of the service cell corresponding to the terminal device, and the terminal device determines the cell reselection co-frequency and / or inter-frequency measurement threshold based on the transmission parameters, including: the terminal device determines the cell reselection co-frequency and / or inter-frequency measurement threshold corresponding to the elevation angle from a mapping relationship between the elevation angle and the cell reselection co-frequency and / or inter-frequency measurement threshold based on the elevation angle.

[0011] Based on this possible design, as the elevation angle between the network device and the center of the service cell continues to change, the channel state of the terminal device continues to change. The terminal device can avoid triggering the cell reselection co-frequency and / or inter-frequency measurement too early or too late by using different cell reselection co-frequency and / or inter-frequency measurement thresholds at different elevation angles, thereby improving the reliability of the communication system and benefiting the energy saving of the terminal device.

[0012] In one possible design, the transmission parameters include the distance between the terminal device and the network device. The terminal device determines the wireless link failure threshold based on the transmission parameters, including: if the change in distance per unit time is less than or equal to the second threshold, the terminal device uses the third threshold as the wireless link failure threshold; or, if the change in distance per unit time is greater than the second threshold, the terminal device uses the fourth threshold as the wireless link failure threshold; wherein the third threshold is greater than the fourth threshold.

[0013] Based on this possible design, when the distance between the terminal device and the network device becomes smaller and smaller, the terminal device can use the third threshold with a higher threshold as the wireless link failure threshold to avoid the terminal device triggering the wireless link failure recovery process too early, which is beneficial to energy saving of the terminal device; when the distance between the terminal device and the network device becomes larger and larger, the fourth threshold with a lower threshold is used as the wireless link failure threshold to avoid the terminal device triggering the wireless link failure recovery process too late, thereby improving the reliability of the communication system.

[0014] In one possible design, the transmission parameters include the elevation angle of the network device relative to the center of the service cell corresponding to the terminal device, and the terminal device determines the connection state co-frequency and / or heterofrequency measurement threshold based on the transmission parameters, including: the terminal device determines the connection state co-frequency and / or heterofrequency measurement threshold corresponding to the elevation angle from the mapping relationship between the elevation angle and the connection state co-frequency and / or heterofrequency measurement threshold based on the elevation angle.

[0015] Based on this possible design, as the elevation angle between the network device and the center of the service cell continues to change, the channel state of the terminal device continues to change. The terminal device uses different connection state same-frequency and / or different-frequency measurement thresholds at different elevation angles, which can avoid the terminal device triggering the connection state same-frequency and / or different-frequency measurement too early or too late, thereby improving the reliability of the communication system and benefiting the energy saving of the terminal device.

[0016] In one possible design, the terminal device periodically updates the cell reselection same-frequency and / or different-frequency measurement threshold, the radio link failure threshold or the connected state same-frequency and / or different-frequency measurement threshold.

[0017] Based on this possible design, the terminal device can periodically update the cell reselection same-frequency and / or different-frequency measurement threshold, the wireless link failure threshold or the connection state same-frequency and / or different-frequency measurement threshold, so that the terminal device can reasonably adjust the above thresholds during the communication process, thereby improving the reliability of the communication system and benefiting the energy saving of the terminal device.

[0018] In one possible design, when the terminal device determines that the terminal device is located at the edge of the service cell, the terminal device performs cell reselection same-frequency and / or different-frequency measurements; or, the terminal device performs connected state same-frequency measurements.

[0019] Based on this possible design, the terminal device can trigger cell reselection of co-frequency and / or heterofrequency measurement, or trigger connected state co-frequency measurement when the terminal device is located at the edge of the service cell, so as to avoid unnecessary power consumption caused by the inability to find a suitable neighboring cell when the terminal device starts cell reselection of co-frequency and / or heterofrequency measurement, or connected state co-frequency measurement in the center of the service cell, thereby facilitating energy saving of the terminal device. At the same time, it can also save the number of times the terminal device triggers cell reselection of co-frequency and / or heterofrequency measurement, or connected state co-frequency measurement, improve the flexibility of cell reselection of co-frequency and / or heterofrequency measurement, or connected state co-frequency measurement, and improve the efficiency of cell reselection of co-frequency and / or heterofrequency measurement, or connected state co-frequency measurement.

[0020] In one possible design, when the terminal device determines that the distance between the network device and the center of the service cell is the shortest, the terminal device performs cell reselection co-frequency and / or inter-frequency measurements based on the cell reselection co-frequency and / or inter-frequency measurement threshold.

[0021] Based on this possible design, the terminal device can determine whether to trigger cell reselection of co-frequency and / or inter-frequency measurement according to the cell reselection of co-frequency and / or inter-frequency measurement threshold when the distance between the network device and the center of the service cell is closest, thereby saving the number of times the terminal device triggers cell reselection of co-frequency and / or inter-frequency measurement, improving the flexibility of cell reselection of co-frequency and / or inter-frequency measurement, and improving the efficiency of cell reselection of co-frequency and / or inter-frequency measurement.

[0022] In one possible design, the terminal device determines whether to trigger connected state co-frequency and / or heterofrequency measurements based on the indication information sent by the network device based on the position of the terminal device in the service cell. When the indication information is used to indicate the triggering of connected state co-frequency and / or heterofrequency measurements, the terminal device performs connected state co-frequency and / or heterofrequency measurements based on the connected state co-frequency and / or heterofrequency measurement threshold.

[0023] Based on this possible design, the network device can instruct the terminal device to trigger the connection state co-frequency and / or heterofrequency measurement according to the connection state co-frequency and / or heterofrequency measurement threshold when the terminal device is located at the edge of the service cell, so as to avoid unnecessary power consumption caused by the inability to find a suitable neighboring cell when the terminal device starts the connection state co-frequency and / or heterofrequency measurement in the center of the service cell, thereby facilitating energy saving of the terminal device. At the same time, it can also save the number of times the terminal device triggers the connection state co-frequency and / or heterofrequency measurement, improve the flexibility of the connection state co-frequency and / or heterofrequency measurement, and improve the efficiency of the connection state co-frequency and / or heterofrequency measurement.

[0024] In a second aspect, a terminal device is provided, which can implement the functions performed by the terminal device in the first aspect or the possible design of the first aspect, and the functions can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. For example, a receiving module and a processing module. The receiving module is used to obtain the transmission parameters of the network device, and the transmission parameters are used to indicate the location information of the network device; the processing module is used to determine the cell reselection same-frequency and / or different-frequency measurement threshold based on the transmission parameters; or, the processing module is used to determine the wireless link failure threshold based on the transmission parameters; or, the processing module is used to determine the connection state same-frequency and / or different-frequency measurement threshold based on the transmission parameters.

[0025] Among them, the specific implementation method of the terminal device can refer to the behavioral function of the terminal device in the method for obtaining transmission parameters provided by the first aspect or any possible design of the first aspect. Based on the terminal device described in the second aspect, the terminal device can dynamically determine the cell reselection co-frequency and / or heterofrequency measurement threshold, the wireless link failure threshold or the connection state co-frequency and / or heterofrequency measurement threshold according to the location information of the network device. By reasonably adopting different thresholds in different network device location scenarios, the terminal device can avoid triggering the cell reselection co-frequency and / or heterofrequency measurement, the connection state co-frequency and / or heterofrequency measurement, or the detection of wireless link failure too early or too late. While improving the reliability of the communication system, it is also beneficial to energy saving of the terminal device.

[0026] In one possible design, the transmission parameters include the distance between the terminal device and the network device, and the processing module is specifically used to: if the change in distance per unit time is less than or equal to a first threshold, the processing module uses the first threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold; or, if the change in distance per unit time is greater than the first threshold, the processing module uses the second threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold; wherein the first threshold is less than the second threshold.

[0027] Based on this possible design, when the distance between the terminal device and the network device becomes smaller and smaller, the terminal device can use a first threshold with a lower threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold to avoid the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement too early, which is beneficial to energy saving of the terminal device; when the distance between the terminal device and the network device becomes larger and larger, the second threshold with a higher threshold is used as the cell reselection co-frequency and / or inter-frequency measurement threshold to avoid the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement too late, thereby improving the reliability of the communication system.

[0028] In one possible design, the transmission parameters include the elevation angle of the network device relative to the center of the service cell corresponding to the terminal device, and the processing module is specifically used to: determine the cell reselection co-frequency and / or inter-frequency measurement threshold corresponding to the elevation angle from the mapping relationship between the elevation angle and the cell reselection co-frequency and / or inter-frequency measurement threshold.

[0029] Based on this possible design, as the elevation angle between the network device and the center of the service cell continues to change, the channel state of the terminal device continues to change. The terminal device can avoid triggering the cell reselection co-frequency and / or inter-frequency measurement too early or too late by using different cell reselection co-frequency and / or inter-frequency measurement thresholds at different elevation angles, thereby improving the reliability of the communication system and benefiting the energy saving of the terminal device.

[0030] In one possible design, the transmission parameters include the distance between the terminal device and the network device, and the processing module is specifically used to: if the change in distance per unit time is less than or equal to the second threshold, the processing module uses the third threshold as the wireless link failure threshold; or, if the change in distance per unit time is greater than the second threshold, the processing module uses the fourth threshold as the wireless link failure threshold; wherein the third threshold is greater than the fourth threshold.

[0031] Based on this possible design, when the distance between the terminal device and the network device becomes smaller and smaller, the terminal device can use the third threshold with a higher threshold as the wireless link failure threshold to avoid the terminal device triggering the wireless link failure recovery process too early, which is beneficial to energy saving of the terminal device; when the distance between the terminal device and the network device becomes larger and larger, the fourth threshold with a lower threshold is used as the wireless link failure threshold to avoid the terminal device triggering the wireless link failure recovery process too late, thereby improving the reliability of the communication system.

[0032] In one possible design, when the transmission parameters include the elevation angle of the network device relative to the center of the service cell corresponding to the terminal device, the processing module is specifically used to: determine the connection state same-frequency and / or different-frequency measurement threshold corresponding to the elevation angle from the mapping relationship between the elevation angle and the connection state same-frequency and / or different-frequency measurement threshold according to the elevation angle.

[0033] Based on this possible design, as the elevation angle between the network device and the center of the service cell continues to change, the channel state of the terminal device continues to change. The terminal device uses different connection state same-frequency and / or different-frequency measurement thresholds at different elevation angles, which can avoid the terminal device triggering the connection state same-frequency and / or different-frequency measurement too early or too late, thereby improving the reliability of the communication system and benefiting the energy saving of the terminal device.

[0034] In one possible design, the processing module is also used to: periodically update the cell reselection same-frequency and / or different-frequency measurement threshold, the wireless link failure threshold or the connected state same-frequency and / or different-frequency measurement threshold.

[0035] Based on this possible design, the terminal device can periodically update the cell reselection same-frequency and / or different-frequency measurement threshold, the wireless link failure threshold or the connection state same-frequency and / or different-frequency measurement threshold, so that the terminal device can reasonably adjust the above thresholds during the communication process, thereby improving the reliability of the communication system and benefiting the energy saving of the terminal device.

[0036] In one possible design, the processing module is also used to perform cell reselection same-frequency and / or different-frequency measurements when it is determined that the terminal device is located at the edge of the service cell; or, to perform connected state same-frequency measurements.

[0037] Based on this possible design, the terminal device can trigger cell reselection of co-frequency and / or heterofrequency measurement, or trigger connected state co-frequency measurement when the terminal device is located at the edge of the service cell, so as to avoid unnecessary power consumption caused by the inability to find a suitable neighboring cell when the terminal device starts cell reselection of co-frequency and / or heterofrequency measurement, or connected state co-frequency measurement in the center of the service cell, thereby facilitating energy saving of the terminal device. At the same time, it can also save the number of times the terminal device triggers cell reselection of co-frequency and / or heterofrequency measurement, or connected state co-frequency measurement, improve the flexibility of cell reselection of co-frequency and / or heterofrequency measurement, or connected state co-frequency measurement, and improve the efficiency of cell reselection of co-frequency and / or heterofrequency measurement, or connected state co-frequency measurement.

[0038] In one possible design, the processing module is also used to perform cell reselection co-frequency and / or inter-frequency measurements based on the cell reselection co-frequency and / or inter-frequency measurement threshold when it is determined that the distance between the network device and the center of the service cell is the shortest.

[0039] Based on this possible design, the terminal device can determine whether to trigger cell reselection of co-frequency and / or inter-frequency measurement according to the cell reselection of co-frequency and / or inter-frequency measurement threshold when the distance between the network device and the center of the service cell is closest, thereby saving the number of times the terminal device triggers cell reselection of co-frequency and / or inter-frequency measurement, improving the flexibility of cell reselection of co-frequency and / or inter-frequency measurement, and improving the efficiency of cell reselection of co-frequency and / or inter-frequency measurement.

[0040] In one possible design, the processing module is also used to determine whether to trigger connection-state co-frequency and / or hetero-frequency measurements based on the indication information sent by the network device based on the position of the terminal device in the service cell. When the indication information is used to indicate the triggering of connection-state co-frequency and / or hetero-frequency measurements, connection-state co-frequency and / or hetero-frequency measurements are performed according to the connection-state co-frequency and / or hetero-frequency measurement threshold.

[0041] Based on this possible design, the network device can instruct the terminal device to trigger the connection state co-frequency and / or heterofrequency measurement according to the connection state co-frequency and / or heterofrequency measurement threshold when the terminal device is located at the edge of the service cell, so as to avoid unnecessary power consumption caused by the inability to find a suitable neighboring cell when the terminal device starts the connection state co-frequency and / or heterofrequency measurement in the center of the service cell, thereby facilitating energy saving of the terminal device. At the same time, it can also save the number of times the terminal device triggers the connection state co-frequency and / or heterofrequency measurement, improve the flexibility of the connection state co-frequency and / or heterofrequency measurement, and improve the efficiency of the connection state co-frequency and / or heterofrequency measurement.

[0042] In a third aspect, a terminal device is provided. The terminal device may be a terminal device or a chip or system-on-chip in the terminal device. The terminal device may implement the functions performed by the terminal device in each of the above aspects or possible designs, and the functions may be implemented through hardware. In one possible design, the terminal device may include a transceiver and a processor. The transceiver and processor may be used to support the terminal device in implementing the functions described in the first aspect or any possible design of the first aspect. For example, the transceiver may be used to obtain transmission parameters of a network device, where the transmission parameters indicate the location information of the network device; the processor may be used to determine a cell reselection intra-frequency and / or inter-frequency measurement threshold based on the transmission parameters; or the processor may be used to determine a radio link failure threshold based on the transmission parameters; or the processor may be used to determine a connected state intra-frequency and / or inter-frequency measurement threshold based on the transmission parameters. In another possible design, the terminal device may further include a memory for storing necessary computer-executable instructions and data for the terminal device. When the terminal device is in operation, the transceiver and processor execute the computer-executable instructions stored in the memory, causing the terminal device to perform the method for obtaining transmission parameters described in the first aspect or any possible design of the first aspect.

[0043] Among them, the specific implementation method of the terminal device can refer to the behavioral function of the terminal device in the method for obtaining transmission parameters provided by the first aspect or any possible design of the first aspect.

[0044] In a fourth aspect, a method for obtaining transmission parameters is provided, the method comprising: the terminal device obtains the channel state measured by the terminal device in the corresponding service cell; the terminal device determines the cell reselection same-frequency and / or different-frequency measurement threshold based on the channel state; or, the terminal device determines the wireless link failure threshold based on the channel state; or, the terminal device determines the connection state same-frequency and / or different-frequency measurement threshold based on the channel state.

[0045] Based on the fourth aspect, the terminal device can dynamically determine the cell reselection co-frequency and / or inter-frequency measurement threshold, the radio link failure threshold, or the connected state co-frequency and / or inter-frequency measurement threshold based on the terminal device's channel state. By reasonably adopting different thresholds under different channel states, the terminal device can avoid triggering cell reselection co-frequency and / or inter-frequency measurements, connected state co-frequency and / or inter-frequency measurements, or detecting radio link failure too early or too late, thereby improving the reliability of the communication system and also facilitating energy conservation of the terminal device.

[0046] In one possible design, the terminal device determines the cell reselection same / different frequency measurement threshold based on the channel status, including: if the change in the channel status per unit time is greater than or equal to the third threshold, the terminal device uses the fifth threshold as the cell reselection same / different frequency measurement threshold; or, if the change in the channel status per unit time is less than the third threshold, the terminal device uses the sixth threshold as the cell reselection same / different frequency measurement threshold; wherein the fifth threshold is less than the sixth threshold.

[0047] Based on this possible design, the terminal device can use the fifth threshold with a lower threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold when the channel state of the terminal device is getting better and better, so as to avoid the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement too early, which is beneficial to energy saving of the terminal device; when the channel state of the terminal device is getting worse and worse, the sixth threshold with a higher threshold is used as the cell reselection co-frequency and / or inter-frequency measurement threshold, so as to avoid the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement too late, thereby improving the reliability of the communication system.

[0048] In one possible design, the terminal device determines the wireless link failure threshold based on the channel state, including: if the change in the channel state per unit time is greater than or equal to the fourth threshold, the terminal device uses the seventh threshold as the wireless link failure threshold; or, if the change in the channel state per unit time is less than the fourth threshold, the terminal device uses the eighth threshold as the wireless link failure threshold; wherein the seventh threshold is greater than the eighth threshold.

[0049] Based on this possible design, the terminal device can use the seventh threshold with a higher threshold as the wireless link failure threshold when the channel state of the terminal device is getting better and better, so as to avoid the terminal device triggering the wireless link failure recovery process too early, which is beneficial to energy saving of the terminal device; when the channel state of the terminal device is getting worse and worse, the eighth threshold with a lower threshold is used as the wireless link failure threshold, so as to avoid the terminal device triggering the wireless link failure recovery process too late, thereby improving the reliability of the communication system.

[0050] In one possible design, the terminal device determines the connection state same-frequency and / or different-frequency measurement threshold based on the channel state, including: if the change in the channel state per unit time is greater than or equal to the fifth threshold, the terminal device uses the ninth threshold as the connection state same-frequency and / or different-frequency measurement threshold; or, if the change in the channel state per unit time is less than the fifth threshold, the terminal device uses the tenth threshold as the connection state same-frequency and / or different-frequency measurement threshold; wherein the ninth threshold is less than the tenth threshold.

[0051] Based on this possible design, the terminal device can use the ninth threshold with a lower threshold as the connection state same-frequency and / or different-frequency measurement threshold when the channel state of the terminal device is getting better and better, so as to avoid the terminal device triggering the connection state same-frequency and / or different-frequency measurement too early, which is beneficial to energy saving of the terminal device; when the channel state of the terminal device is getting worse and worse, the tenth threshold with a higher threshold is used as the connection state same-frequency and / or different-frequency measurement threshold, so as to avoid the terminal device triggering the connection state same-frequency and / or different-frequency measurement too late, thereby improving the reliability of the communication system.

[0052] In a fifth aspect, a terminal device is provided, which can implement the functions performed by the terminal device in the fourth aspect or the possible design of the fourth aspect, and the functions can be implemented by hardware executing the corresponding software. The hardware or software includes one or more modules corresponding to the above functions. For example, a processing module. The processing module is used to obtain the channel state measured by the terminal device in the corresponding service cell; the processing module is also used to determine the cell reselection co-frequency and / or inter-frequency measurement threshold based on the channel state; or, the processing module is also used to determine the wireless link failure threshold based on the channel state; or, the processing module is also used to determine the connection state co-frequency and / or inter-frequency measurement threshold based on the channel state.

[0053] Among them, the specific implementation method of the terminal device can refer to the behavioral function of the terminal device in the method for obtaining transmission parameters provided by the fourth aspect or any possible design of the fourth aspect. Based on the terminal device described in the fifth aspect, the terminal device can dynamically determine the cell reselection co-frequency and / or heterofrequency measurement threshold, the wireless link failure threshold or the connection state co-frequency and / or heterofrequency measurement threshold according to the channel state of the terminal device. By reasonably adopting different thresholds under different channel states, the terminal device can avoid triggering the cell reselection co-frequency and / or heterofrequency measurement, the connection state co-frequency and / or heterofrequency measurement, or the detection of wireless link failure too early or too late. While improving the reliability of the communication system, it is also beneficial to energy saving of the terminal device.

[0054] In one possible design, the processing module is specifically used to: if the change in the channel state per unit time is greater than or equal to the third threshold, the processing module uses the fifth threshold as the cell reselection same / different frequency measurement threshold; or, if the change in the channel state per unit time is less than the third threshold, the processing module uses the sixth threshold as the cell reselection same / different frequency measurement threshold; wherein the fifth threshold is less than the sixth threshold.

[0055] Based on this possible design, the terminal device can use the fifth threshold with a lower threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold when the channel state of the terminal device is getting better and better, so as to avoid the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement too early, which is beneficial to energy saving of the terminal device; when the channel state of the terminal device is getting worse and worse, the sixth threshold with a higher threshold is used as the cell reselection co-frequency and / or inter-frequency measurement threshold, so as to avoid the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement too late, thereby improving the reliability of the communication system.

[0056] In one possible design, the processing module is specifically used to: if the change in the channel state per unit time is greater than or equal to the fourth threshold, the processing module uses the seventh threshold as the wireless link failure threshold; or, if the change in the channel state per unit time is less than the fourth threshold, the processing module uses the eighth threshold as the wireless link failure threshold; wherein the seventh threshold is greater than the eighth threshold.

[0057] Based on this possible design, the terminal device can use the seventh threshold with a higher threshold as the wireless link failure threshold when the channel state of the terminal device is getting better and better, so as to avoid the terminal device triggering the wireless link failure recovery process too early, which is beneficial to energy saving of the terminal device; when the channel state of the terminal device is getting worse and worse, the eighth threshold with a lower threshold is used as the wireless link failure threshold, so as to avoid the terminal device triggering the wireless link failure recovery process too late, thereby improving the reliability of the communication system.

[0058] In one possible design, the processing module is specifically used to: if the change in the channel state per unit time is greater than or equal to the fifth threshold, the processing module uses the ninth threshold as the connection state same-frequency and / or different-frequency measurement threshold; or, if the change in the channel state per unit time is less than the fifth threshold, the processing module uses the tenth threshold as the connection state same-frequency and / or different-frequency measurement threshold; wherein the ninth threshold is less than the tenth threshold.

[0059] Based on this possible design, the terminal device can use the ninth threshold with a lower threshold as the connection state same-frequency and / or different-frequency measurement threshold when the channel state of the terminal device is getting better and better, so as to avoid the terminal device triggering the connection state same-frequency and / or different-frequency measurement too early, which is beneficial to energy saving of the terminal device; when the channel state of the terminal device is getting worse and worse, the tenth threshold with a higher threshold is used as the connection state same-frequency and / or different-frequency measurement threshold, so as to avoid the terminal device triggering the connection state same-frequency and / or different-frequency measurement too late, thereby improving the reliability of the communication system.

[0060] In a sixth aspect, a terminal device is provided. The terminal device may be a terminal device or a chip or system-on-chip in the terminal device. The terminal device may implement the functions performed by the terminal device in each of the above aspects or possible designs, and the functions may be implemented through hardware. In one possible design, the terminal device may include: a processor. The processor may be used to support the terminal device in implementing the functions involved in the above fourth aspect or any possible design of the fourth aspect. For example, the processor may be used to obtain the channel state measured by the terminal device in the corresponding serving cell; the processor may be used to determine the cell reselection intra-frequency and / or inter-frequency measurement threshold based on the channel state; or the processor may be used to determine the radio link failure threshold based on the channel state; or the processor may be used to determine the connected state intra-frequency and / or inter-frequency measurement threshold based on the channel state. In another possible design, the terminal device may further include a memory for storing computer-executable instructions and data necessary for the terminal device. When the terminal device is in operation, the processor executes the computer-executable instructions stored in the memory, causing the terminal device to perform the method for obtaining transmission parameters as described in the above fourth aspect or any possible design of the fourth aspect.

[0061] Among them, the specific implementation method of the terminal device can refer to the behavioral function of the terminal device in the method for obtaining transmission parameters provided by the fourth aspect or any possible design of the fourth aspect.

[0062] In the seventh aspect, an embodiment of the present application provides a method for obtaining transmission parameters, the method comprising: a network device sends a transmission parameter for indicating the location information of the network device to a terminal device; so that the terminal device determines the cell reselection same-frequency and / or different-frequency measurement threshold based on the transmission parameter; or, determines the wireless link failure threshold based on the transmission parameter; or, determines the connection state same-frequency and / or different-frequency measurement threshold based on the transmission parameter.

[0063] Based on the seventh aspect, the network device indicates the terminal's location information to the terminal device, so that the terminal device can dynamically determine the cell reselection co-frequency and / or inter-frequency measurement threshold, the wireless link failure threshold, or the connected state co-frequency and / or inter-frequency measurement threshold based on the network device's location information. This allows the terminal device to reasonably adopt different thresholds in different network device location scenarios, avoiding the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement, the connected state co-frequency and / or inter-frequency measurement, or detecting the wireless link failure too early or too late. While improving the reliability of the communication system, it is also beneficial to energy saving of the terminal device.

[0064] In one possible design, the transmission parameters include the distance between the terminal device and the network device, so that when the change in the distance of the terminal device per unit time is less than or equal to a first threshold, the first threshold is used as the cell reselection co-frequency and / or inter-frequency measurement threshold; or, when the change in the distance per unit time is greater than the first threshold, the second threshold is used as the cell reselection co-frequency and / or inter-frequency measurement threshold; wherein the first threshold is less than the second threshold.

[0065] Based on this possible design, when the distance between the terminal device and the network device becomes smaller and smaller, the terminal device can use a first threshold with a lower threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold to avoid the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement too early, which is beneficial to energy saving of the terminal device; when the distance between the terminal device and the network device becomes larger and larger, the terminal device can use a second threshold with a higher threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold to avoid the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement too late, thereby improving the reliability of the communication system.

[0066] In one possible design, the transmission parameters include the elevation angle of the network device relative to the center of the service cell corresponding to the terminal device, so that the terminal device determines the cell reselection co-frequency and / or inter-frequency measurement threshold corresponding to the elevation angle from the mapping relationship between the elevation angle and the cell reselection co-frequency and / or inter-frequency measurement threshold.

[0067] Based on this possible design, as the elevation angle between the network device and the center of the service cell continues to change, the channel state of the terminal device continues to change. The terminal device can avoid triggering the cell reselection co-frequency and / or inter-frequency measurement too early or too late by using different cell reselection co-frequency and / or inter-frequency measurement thresholds at different elevation angles, thereby improving the reliability of the communication system and benefiting the energy saving of the terminal device.

[0068] In one possible design, the transmission parameters include the distance between the terminal device and the network device, so that when the change in the distance of the terminal device per unit time is less than or equal to the second threshold, the third threshold is used as the wireless link failure threshold; or, when the change in the distance per unit time is greater than the second threshold, the fourth threshold is used as the wireless link failure threshold; wherein the third threshold is greater than the fourth threshold.

[0069] Based on this possible design, when the distance between the terminal device and the network device becomes smaller and smaller, the terminal device can use the third threshold with a higher threshold as the wireless link failure threshold to avoid the terminal device triggering the wireless link failure recovery process too early, which is beneficial to energy saving of the terminal device; when the distance between the terminal device and the network device becomes larger and larger, the terminal device can use the fourth threshold with a lower threshold as the wireless link failure threshold to avoid the terminal device triggering the wireless link failure recovery process too late, thereby improving the reliability of the communication system.

[0070] In one possible design, the transmission parameters include the elevation angle of the network device relative to the center of the service cell corresponding to the terminal device, so that the terminal device determines the connection state same-frequency and / or different-frequency measurement threshold corresponding to the elevation angle from the mapping relationship between the elevation angle and the connection state same-frequency and / or different-frequency measurement threshold.

[0071] Based on this possible design, as the elevation angle between the network device and the center of the service cell continues to change, the channel state of the terminal device continues to change. The terminal device uses different connection state same-frequency and / or different-frequency measurement thresholds at different elevation angles, which can avoid the terminal device triggering the connection state same-frequency and / or different-frequency measurement too early or too late, thereby improving the reliability of the communication system and benefiting the energy saving of the terminal device.

[0072] In one possible design, the network device determines the position of the terminal device in the service cell; and sends indication information to the terminal device based on the position of the terminal device in the service cell, so that the terminal device determines whether to trigger the connection state co-frequency and / or heterofrequency measurement based on the indication information, wherein, when the indication information is used to indicate the triggering of the connection state co-frequency and / or heterofrequency measurement, the terminal device performs the connection state co-frequency and / or heterofrequency measurement based on the connection state co-frequency and / or heterofrequency measurement threshold.

[0073] Based on this possible design, the network device can instruct the terminal device to trigger the connection state co-frequency and / or heterofrequency measurement according to the connection state co-frequency and / or heterofrequency measurement threshold when the terminal device is located at the edge of the service cell, so as to avoid unnecessary power consumption caused by the inability to find a suitable neighboring cell when the terminal device starts the connection state co-frequency and / or heterofrequency measurement in the center of the service cell, thereby facilitating energy saving of the terminal device. At the same time, it can also save the number of times the terminal device triggers the connection state co-frequency and / or heterofrequency measurement, improve the flexibility of the connection state co-frequency and / or heterofrequency measurement, and improve the efficiency of the connection state co-frequency and / or heterofrequency measurement.

[0074] In an eighth aspect, a network device is provided, which can implement the functions performed by the network device in the seventh aspect or the possible design of the seventh aspect, and the functions can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. For example, a sending module. The sending module is used to send transmission parameters for indicating the location information of the network device to the terminal device; so that the terminal device determines the cell reselection co-frequency and / or inter-frequency measurement threshold based on the transmission parameters; or, determines the wireless link failure threshold based on the transmission parameters; or, determines the connection state co-frequency and / or inter-frequency measurement threshold based on the transmission parameters.

[0075] Among them, the specific implementation method of the network device can refer to the behavioral function of the network device in the method for obtaining transmission parameters provided by the seventh aspect or any possible design of the seventh aspect. Based on the network device described in the eighth aspect, the network device can indicate the location information of the terminal to the terminal device, so that the terminal device can dynamically determine the cell reselection same-frequency and / or different-frequency measurement threshold, the wireless link failure threshold or the connection state same-frequency and / or different-frequency measurement threshold according to the location information of the network device. In this way, the terminal device can reasonably adopt different thresholds when the network device is in different location scenarios, avoiding the terminal device from triggering the cell reselection same-frequency and / or different-frequency measurement, the connection state same-frequency and / or different-frequency measurement or detecting the wireless link failure too early or too late, while improving the reliability of the communication system, it is also beneficial to energy saving of the terminal device.

[0076] In one possible design, the transmission parameters include the distance between the terminal device and the network device, so that when the change in the distance of the terminal device per unit time is less than or equal to a first threshold, the first threshold is used as the cell reselection co-frequency and / or inter-frequency measurement threshold; or, when the change in the distance per unit time is greater than the first threshold, the second threshold is used as the cell reselection co-frequency and / or inter-frequency measurement threshold; wherein the first threshold is less than the second threshold.

[0077] Based on this possible design, when the distance between the terminal device and the network device becomes smaller and smaller, the terminal device can use a first threshold with a lower threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold to avoid the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement too early, which is beneficial to energy saving of the terminal device; when the distance between the terminal device and the network device becomes larger and larger, the terminal device can use a second threshold with a higher threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold to avoid the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement too late, thereby improving the reliability of the communication system.

[0078] In one possible design, the transmission parameters include the elevation angle of the network device relative to the center of the service cell corresponding to the terminal device, so that the terminal device determines the cell reselection co-frequency and / or inter-frequency measurement threshold corresponding to the elevation angle from the mapping relationship between the elevation angle and the cell reselection co-frequency and / or inter-frequency measurement threshold.

[0079] Based on this possible design, as the elevation angle between the network device and the center of the service cell continues to change, the channel state of the terminal device continues to change. The terminal device can avoid triggering the cell reselection co-frequency and / or inter-frequency measurement too early or too late by using different cell reselection co-frequency and / or inter-frequency measurement thresholds at different elevation angles, thereby improving the reliability of the communication system and benefiting the energy saving of the terminal device.

[0080] In one possible design, the transmission parameters include the distance between the terminal device and the network device, so that when the change in the distance of the terminal device per unit time is less than or equal to the second threshold, the third threshold is used as the wireless link failure threshold; or, when the change in the distance per unit time is greater than the second threshold, the fourth threshold is used as the wireless link failure threshold; wherein the third threshold is greater than the fourth threshold.

[0081] Based on this possible design, when the distance between the terminal device and the network device becomes smaller and smaller, the terminal device can use the third threshold with a higher threshold as the wireless link failure threshold to avoid the terminal device triggering the wireless link failure recovery process too early, which is beneficial to energy saving of the terminal device; when the distance between the terminal device and the network device becomes larger and larger, the terminal device can use the fourth threshold with a lower threshold as the wireless link failure threshold to avoid the terminal device triggering the wireless link failure recovery process too late, thereby improving the reliability of the communication system.

[0082] In one possible design, the transmission parameters include the elevation angle of the network device relative to the center of the service cell corresponding to the terminal device, so that the terminal device determines the connection state same-frequency and / or different-frequency measurement threshold corresponding to the elevation angle from the mapping relationship between the elevation angle and the connection state same-frequency and / or different-frequency measurement threshold.

[0083] Based on this possible design, as the elevation angle between the network device and the center of the service cell continues to change, the channel state of the terminal device continues to change. The terminal device uses different connection state same-frequency and / or different-frequency measurement thresholds at different elevation angles, which can avoid the terminal device triggering the connection state same-frequency and / or different-frequency measurement too early or too late, thereby improving the reliability of the communication system and benefiting the energy saving of the terminal device.

[0084] In one possible design, the network device also includes a processing module, wherein the processing module is used to determine the position of the terminal device in the service cell; the sending module is also used to send indication information to the terminal device according to the position of the terminal device in the service cell, so that the terminal device determines whether to trigger the connection state co-frequency and / or heterofrequency measurement according to the indication information, wherein, when the indication information is used to indicate the triggering of the connection state co-frequency and / or heterofrequency measurement, the terminal device performs the connection state co-frequency and / or heterofrequency measurement according to the connection state co-frequency and / or heterofrequency measurement threshold.

[0085] Based on this possible design, the network device can instruct the terminal device to trigger the connection state co-frequency and / or heterofrequency measurement according to the connection state co-frequency and / or heterofrequency measurement threshold when the terminal device is located at the edge of the service cell, so as to avoid unnecessary power consumption caused by the inability to find a suitable neighboring cell when the terminal device starts the connection state co-frequency and / or heterofrequency measurement in the center of the service cell, thereby facilitating energy saving of the terminal device. At the same time, it can also save the number of times the terminal device triggers the connection state co-frequency and / or heterofrequency measurement, improve the flexibility of the connection state co-frequency and / or heterofrequency measurement, and improve the efficiency of the connection state co-frequency and / or heterofrequency measurement.

[0086] In a ninth aspect, a network device is provided. The network device may be a network device or a chip or system-on-chip within the network device. The network device may implement the functions performed by the network device in each of the above aspects or possible designs, and the functions may be implemented through hardware. In one possible design, the network device may include a transceiver. The transceiver may be used to support the network device in implementing the functions described in the seventh aspect or any possible design of the seventh aspect. For example, the transceiver may be used to send transmission parameters indicating the location information of the network device to a terminal device, so that the terminal device determines a cell reselection intra-frequency and / or inter-frequency measurement threshold based on the transmission parameters; or determines a radio link failure threshold based on the transmission parameters; or determines a connected state intra-frequency and / or inter-frequency measurement threshold based on the transmission parameters. In another possible design, the network device may further include a processor and a memory, the memory being used to store computer-executable instructions and data necessary for the terminal device. When the network device is in operation, the transceiver and processor execute the computer-executable instructions stored in the memory, so that the network device performs the method for obtaining transmission parameters described in the seventh aspect or any possible design of the seventh aspect.

[0087] Among them, the specific implementation method of the network device can refer to the behavioral function of the network device in the method for obtaining transmission parameters provided by the seventh aspect or any possible design of the seventh aspect.

[0088] In the tenth aspect, a computer-readable storage medium is provided, which stores computer instructions or programs. When the computer instructions or programs are run on a computer, the computer executes the method for obtaining transmission parameters as described in the first aspect or any possible design of the first aspect, or executes the method for obtaining transmission parameters as described in the fourth aspect or any possible design of the fourth aspect, or executes the method for obtaining transmission parameters as described in the seventh aspect or any possible design of the seventh aspect.

[0089] In the eleventh aspect, a computer program product comprising instructions is provided, which, when run on a computer, enables the computer to execute the method for obtaining transmission parameters as described in the first aspect or any possible design of the first aspect, or execute the method for obtaining transmission parameters as described in the fourth aspect or any possible design of the fourth aspect, or execute the method for obtaining transmission parameters as described in the seventh aspect or any possible design of the seventh aspect.

[0090] In the twelfth aspect, a chip system is provided, comprising one or more processors and one or more memories; the one or more memories are coupled to the one or more processors, and computer program code or computer instructions are stored in the one or more memories; when the one or more processors execute the computer program code or computer instructions, the chip system executes the method for obtaining transmission parameters as described in the first aspect or any possible design of the first aspect, or executes the method for obtaining transmission parameters as described in the fourth aspect or any possible design of the fourth aspect, or executes the method for obtaining transmission parameters as described in the seventh aspect or any possible design of the seventh aspect.

[0091] Among them, the technical effects brought about by any one of the design methods in aspects 10 to 12 can refer to the technical effects brought about by any one of the possible designs in aspects 1 to 2 above, or refer to the technical effects brought about by any one of the possible designs in aspects 4 to 5 above, or refer to the technical effects brought about by any one of the possible designs in aspects 7 to 8 above, and no further details will be given.

[0092] In the thirteenth aspect, a communication system is provided, which includes the terminal device as described in any one of the second to third aspects, or includes the terminal device as described in any one of the fifth to sixth aspects, and the network device as described in any one of the eighth to ninth aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0093] Figure 1a A schematic diagram of a satellite trajectory provided in an embodiment of the present application;

[0094] Figure 1b A schematic diagram of a channel state of a terminal device provided in an embodiment of the present application;

[0095] Figure 1 A schematic diagram of a communication system provided in an embodiment of the present application;

[0096] Figure 1c A schematic diagram of a communication architecture of a communication system provided in an embodiment of the present application;

[0097] Figure 1d A schematic diagram of a communication architecture of a communication system provided in an embodiment of the present application;

[0098] Figure 1e A schematic diagram of a communication architecture of a communication system provided in an embodiment of the present application;

[0099] Figure 2 A structural diagram of a communication device provided in an embodiment of the present application;

[0100] Figure 3 A flow chart of a method for obtaining transmission parameters provided in an embodiment of the present application;

[0101] Figure 3a A schematic diagram of an elevation angle provided in an embodiment of the present application;

[0102] Figure 3b A structural diagram of a serving cell provided in an embodiment of the present application;

[0103] Figure 3c A flow chart of a method for obtaining transmission parameters provided in an embodiment of the present application;

[0104] Figure 4 A flow chart of a method for obtaining transmission parameters provided in an embodiment of the present application;

[0105] Figure 4a A flow chart of a method for obtaining transmission parameters provided in an embodiment of the present application;

[0106] Figure 5 A flow chart of a method for obtaining transmission parameters provided in an embodiment of the present application;

[0107] Figure 5a A flow chart of a method for obtaining transmission parameters provided in an embodiment of the present application;

[0108] Figure 6 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0109] Figure 7 A schematic diagram of the structure of a network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0110] Before describing the embodiments of the present application, the technical terms involved in the embodiments of the present application are described.

[0111] In a communication system, cells supporting the same communication system are referred to as intra-system cells, while cells supporting different communication systems are referred to as inter-system cells. For cells supporting the same communication system, if adjacent cells share the same center frequency, they are referred to as intra-frequency cells; otherwise, they are referred to as inter-frequency cells.

[0112] Serving cell: refers to the cell that currently provides communication services to the terminal device. The serving cell can also be described as the cell where the terminal device currently resides.

[0113] Idle state: When the terminal device does not establish a communication connection with the network device through the random access process, the terminal device is said to be in an idle state. The idle state may refer to the absence of a radio resource control (RRC) connection between the terminal device and the network device. The idle state may also be called the RRC_idle state. When the terminal device is in the idle state, the context of the terminal device is not saved in the network device, there is no non-access stratum (NAS) signaling connection between the terminal device and the core network device (such as the mobility management network element), there is no N2 connection between the network device and the core network device (such as the mobility management network element), and the core network device saves the context of the terminal device. The network device does not know whether the terminal device is within the coverage of the network device. The core network device does not know which network device the terminal device is within the coverage or management scope, and the network device does not know which network device can be used to locate or find the terminal device.

[0114] Connected state: When a terminal device establishes a communication connection with a network device through a random access process, the terminal device is said to be in a connected state. The connected state may include an RRC connected state or a connection management (CM) connected state. Specifically, the RRC connected state may refer to the existence of an RRC connection between the terminal device and the network device, the CM connected state may refer to the existence of a NAS signaling connection between the terminal device and the core network device (such as a mobility management network element), and the existence of an N2 connection between the network device and the core network device. When the terminal device is in the RRC connected state and the CM connected state, the network device and the core network device both save the context of the terminal device. The network device knows that the terminal device is within the coverage of the network device or within the management scope of the network device. The core network device knows through which network device the terminal device can be located or found. In the connected state, the terminal device can transmit downlink data and / or uplink data with the network device.

[0115] Cell reselection: When the terminal device is in an idle state, it can change the cell through cell reselection. For example, assuming that the terminal device is in the coverage of the serving cell and the neighboring cell at the same time during the movement, the terminal device can reside in the neighboring cell through cell reselection when the cell reselection conditions are met to obtain better communication services. Among them, cell reselection can include cell reselection same-frequency measurement of the same system, cell reselection different-frequency measurement of the same system, and / or cell reselection different-system measurement of different systems. It should be noted that cell reselection same-frequency measurement can also be described as idle same-frequency measurement, cell reselection different-frequency measurement can also be described as idle different-frequency measurement, and cell reselection different-system measurement can also be described as idle different-system measurement, without limitation.

[0116] Specifically, the terminal device may determine whether it needs to switch from the serving cell to the neighboring cell based on the cell priority of the serving cell, the cell priority of the neighboring cell, and the cell reselection intra-frequency and / or inter-frequency measurement threshold.

[0117] For example, referring to Table 1 below, for neighboring cells whose cell priority is higher than that of the serving cell, no matter how good the channel state of the terminal device in the serving cell is, the terminal device must unconditionally start the cell reselection inter-frequency measurement and cell reselection inter-system measurement. For neighboring cells whose cell priority is equal to that of the serving cell, the terminal device can measure the channel state of the terminal device in the serving cell. When the channel state of the serving cell is less than or equal to the cell reselection same-frequency measurement threshold, the cell reselection same-frequency measurement is started; when the channel state of the serving cell is less than or equal to the cell reselection inter-frequency measurement threshold, the cell reselection inter-frequency measurement is started. For neighboring cells whose cell priority is lower than that of the serving cell, the terminal device can compare the channel state of the terminal device in the serving cell with the cell reselection inter-frequency measurement threshold. If the channel state is less than or equal to the cell reselection inter-frequency measurement threshold, the cell reselection inter-frequency measurement and cell reselection inter-system measurement are started. It should be noted that the cell reselection same-frequency measurement threshold can also be described as the idle state same-frequency measurement threshold, and the cell reselection inter-frequency measurement threshold can also be described as the idle state inter-frequency measurement threshold.

[0118] When performing the above-mentioned cell reselection measurement, the terminal device may receive a system message from a neighboring cell and determine whether it is necessary to switch from the serving cell to the neighboring cell based on the system information of the neighboring cell. For example, taking the cell priority of the neighboring cell as an example, where the cell priority of the neighboring cell is higher than the cell priority of the serving cell, and assuming that the system information of the neighboring cell indicates that the neighboring cell has no access restriction, the terminal device may switch from the serving cell to the neighboring cell; if the system information of the neighboring cell indicates that the neighboring cell has reached the access limit, the terminal device continues to reside in the current serving cell.

[0119] Table 1

[0120]

[0121] Channel state: It can also be described as signal quality, channel quality, etc., without limitation, and can include one or more parameters such as reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), signal to noise ratio (SNR), signal to interference plus noise ratio (SINR), etc., and may also include other parameters used to indicate the signal quality of the terminal device in the serving cell, without limitation.

[0122] For example, when RSRP is used to indicate or measure the channel state, the cell reselection intra-frequency measurement threshold may be SIntraSearchP, and the cell reselection inter-frequency measurement threshold may be SnonIntraSearchP. When RSRQ is used to indicate or measure the channel state, the cell reselection intra-frequency measurement threshold may be SIntraSearchQ, and the cell reselection inter-frequency measurement threshold may be SnonIntraSearchQ.

[0123] It should be noted that the lower the cell reselection co-frequency and / or inter-frequency measurement threshold, the more difficult it is for the terminal device to trigger the cell reselection co-frequency and / or inter-frequency measurement. That is, when the channel state of the terminal device is very poor, its channel state-related parameters will be lower than the measurement threshold, and the cell reselection co-frequency and / or inter-frequency measurement will be triggered.

[0124] Cell switching: When the terminal device is in a connected state, it can change the cell through cell switching. For example, assuming that the terminal moves from the coverage of the serving cell to the coverage of the neighboring cell during the movement, the terminal device can switch from the current serving cell to the neighboring cell through cell switching to obtain better communication services. Among them, cell switching can include connection state same-frequency measurement of the same system, connection state different-frequency measurement of the same system, and / or connection state different-system measurement of different systems.

[0125] Specifically, the network device may carry the measurement configuration information in the MeasConfig element of the radio resource control connection reconfiguration (RRC connection reconfigurtion) message and send it to the terminal device, wherein the measurement configuration information includes information such as the object that the terminal device needs to measure, the cell list, the reporting method, the measurement identifier, and the event parameters. It should be noted that the description of the measurement configuration information can specifically refer to the description of the measurement configuration information in the existing communication protocol and will not be repeated here.

[0126] After receiving the measurement configuration information, the terminal device can measure the serving cell and determine whether it is necessary to perform measurements on the neighboring cells based on the s-MeasureConfig in the RRCconnection reconfigurtion message. If so, the neighboring cells are measured to obtain measurement results. The measurement results can be the channel states measured by the terminal device based on the synchronization signal block (SSB) or the physical broadcast channel block (PBCH block) or the channel state information-reference signal (CSI-RS). When the measurement report conditions are met, the terminal device can fill in the measurement results into a measurement report message and send it to the network device. The measurement report conditions can be periodic measurement reports or measurement reports triggered by events.

[0127] Specifically, when the terminal device triggers a measurement report based on an event, the event trigger reporting configuration may include various event categories and threshold values, the duration for meeting the trigger conditions (time to trigger), and the type of reference signal (such as SSB or CSI-RS), etc., without restriction.

[0128] For example, referring to Table 2, the terminal device may trigger a measurement report according to the following A1 event or A2 event:

[0129] Table 2

[0130]

[0131] Among them, the A1 event is used to stop the connected state inter-frequency and inter-system measurement, and is triggered when the channel status is higher than the connected state inter-frequency measurement threshold; the A2 event is used to start the connected state inter-frequency and inter-system measurement, and is triggered when the channel status is lower than the connected state inter-frequency measurement threshold; Ms is the measurement result of the serving cell, Hys is the hysteresis parameter of the A1 event or A2 event, and Thresh is the connected state inter-frequency measurement threshold.

[0132] It should be noted that the lower the connection state same-frequency and / or different-frequency measurement threshold, the more difficult it is for the terminal device to trigger the connection state same-frequency and / or different-frequency measurement. That is, when the channel state of the terminal device is very poor, its channel state-related parameters will be lower than the measurement threshold, and the connection state same-frequency and / or different-frequency measurement will be triggered.

[0133] Radio link failure recovery process: When the terminal device or network device finds that the channel state is poor, or cannot decode the physical downlink control channel (PDCCH) and the physical downlink shared channel (PDSCH), and cannot receive an acknowledgement frame (ACK) or a non-acknowledgement frame (NACK), the terminal device can use a time-out mechanism to avoid the terminal device waiting for feedback indefinitely. For example, when the radio link failure (RLF) threshold is met, the terminal device may consider that a radio link failure has occurred, triggering an infinite link failure recovery process, and then restore the connection with the serving cell or establish a connection with a new cell.

[0134] Among them, the radio link failure threshold may include one or more of the following: physical layer reporting threshold (Qin, Qout), physical layer failure detection times and timer, radio link control (RLC) layer maximum retransmission times, media access control (MAC) layer random access preamble maximum transmission times.

[0135] Specifically, for the physical layer reporting threshold, the physical layer can evaluate the link quality of the radio link. When the link quality is lower than Qout, the physical layer can report radio link desynchronization to the upper layer. When the link quality is higher than Qin, the physical layer can report radio link synchronization to the upper layer. Regarding the number of physical layer failure detections and timers, the number of physical layer failure detections can use the N310 counter, and the physical layer failure detection timer can use the T310 timer. The N310 counter is used to indicate the maximum number of consecutive radio link desynchronization indications received. When the N310 counter reaches the maximum number, the T310 timer is triggered to start. After the T310 timer starts, if no consecutive N311 radio link synchronization indications are received within the timer, the radio link is determined to have failed. Regarding the maximum number of RLC layer retransmissions, if the terminal device's retransmission count at the RLC layer reaches the maximum number of RLC retransmissions, the radio link is determined to have failed. Regarding the maximum number of MAC layer random access preamble transmissions, if the number of MAC layer random access preamble transmissions reaches the maximum number of transmissions, the radio link is determined to have failed.

[0136] It should be noted that the higher the wireless link failure threshold, the more detection times or retransmission times or preamble code transmission times are required before confirming the failure of the wireless link, which means that it is more difficult for the terminal device to trigger the wireless link failure recovery process, that is, the terminal device will only trigger the wireless link failure recovery process when the link quality of the wireless link is very poor.

[0137] In non-terrestrial networks (NTNs), base stations, or portions of base station functionality, can be deployed on flying platforms such as satellites to provide seamless coverage for end devices. However, because satellites are constantly moving, the changing distance between the satellite and the end device can cause the corresponding channel state to fluctuate more dramatically.

[0138] For example, Figure 1a As shown in the figure, when the satellite passes through points A, B, and C in sequence according to its trajectory, the terminal device UE located in the serving cell a may experience the following Figure 1b In the process shown in FIG1 , in which the channel state gradually improves and then gradually deteriorates, if the cell reselection co-frequency and / or inter-frequency measurement threshold and the connected state co-frequency and / or inter-frequency measurement threshold are set low, or the wireless link failure threshold is set high, as the satellite moves farther and farther away from the terminal device, the cell reselection co-frequency and / or inter-frequency measurement and the connected state co-frequency and / or inter-frequency measurement or the wireless link failure detection cannot be triggered in time, which leads to the inability to perform cell reselection, cell handover, and wireless link failure recovery in a timely manner, resulting in low reliability of the communication system. If the cell reselection co-frequency and / or inter-frequency measurement threshold, the connection state co-frequency and / or inter-frequency measurement threshold are set high, or the infinite link failure threshold is set low, when the satellite is getting closer to the terminal device, the channel state of the terminal device at a certain moment may be poor, but as the satellite gets closer to the terminal device, the channel state of the terminal may soon improve. If the terminal device triggers cell reselection co-frequency and / or inter-frequency measurement, connection state co-frequency and / or inter-frequency measurement, or detects infinite link failure at this time, it will cause the terminal device to trigger cell reselection co-frequency and / or inter-frequency measurement, connection state co-frequency and / or inter-frequency measurement, or detect infinite link failure too early, which is not conducive to energy saving of the terminal device. In particular, if the following occurs: Figure 1b If the channel conditions suddenly deteriorate, as shown by point D, the terminal device may trigger a measurement. However, as the satellite approaches the terminal device, the channel conditions may quickly improve, making measurement unnecessary. Fluctuating channel conditions may cause the terminal device to perform frequent measurements, which is detrimental to energy conservation. Therefore, determining the appropriate thresholds for intra- and / or inter-frequency measurements during cell reselection, intra- and / or inter-frequency measurements during connected state, or radio link failure thresholds is a pressing issue.

[0139] It should be noted that when the radio link failure threshold includes the physical layer reporting threshold (Qin, Qout), the lower the physical layer reporting threshold (Qin, Qout) is set, the higher the radio link failure threshold. When the radio link failure threshold includes the number of physical layer failure detections and a timer, the higher the parameters of the number of physical layer failure detections and the timer are set, the higher the radio link failure threshold. When the radio link failure threshold includes the maximum number of RLC layer retransmissions, the higher the RLC layer maximum retransmissions are set, the higher the radio link failure threshold. When the radio link failure threshold includes the maximum number of MAC layer random access preamble transmissions, the higher the maximum number of MAC layer random access preamble transmissions is set, the higher the radio link failure threshold.

[0140] To solve this problem, an embodiment of the present application provides a method for obtaining transmission parameters, wherein the terminal device can dynamically determine the cell reselection co-frequency and / or heterofrequency measurement threshold, the wireless link failure threshold, or the connection state co-frequency and / or heterofrequency measurement threshold based on the location information of the network device. By reasonably adopting different thresholds in different network device location scenarios, the terminal device can avoid triggering the cell reselection co-frequency and / or heterofrequency measurement, the connection state co-frequency and / or heterofrequency measurement, or the detection of wireless link failure too early or too late, which improves the reliability of the communication system and is also beneficial to energy saving of the terminal device.

[0141] The following describes in detail the implementation of the embodiments of the present application in conjunction with the accompanying drawings.

[0142] The method for obtaining transmission parameters provided in the embodiment of the present application can be used in any communication system, which can be a third generation partnership project (3GPP) communication system, for example, a long term evolution (LTE) system, or a fifth generation (5G) mobile communication system, a new radio (NR) system, an NR V2X system, and other next-generation communication systems, or a non-3GPP communication system without limitation.

[0143] The method for obtaining transmission parameters provided in the embodiment of the present application can be applied to communication scenarios where the distance between the terminal device and the network device is constantly changing.

[0144] Below Figure 1 Taking this as an example, the method for obtaining transmission parameters provided in an embodiment of the present application is described.

[0145] Figure 1 A schematic diagram of a communication system provided in an embodiment of the present application is shown in FIG. Figure 1As shown, the communication system may be an NTN communication system, and the NTN communication system may include at least one terminal device and at least one network device.

[0146] in, Figure 1 The terminal device can be located within the cell coverage of the network device. The terminal device can communicate with the network device through the uplink (UL) or downlink (DL) over the air interface. For example, the terminal can send uplink data to the network device through the uplink physical layer shared channel (PUSCH) in the UL direction; and the network device can send downlink data to the terminal device through the downlink physical layer shared channel (PDSCH) in the DL direction.

[0147] Figure 1 The terminal device in the specification can be called user equipment (UE) or mobile station (MS) or mobile terminal (MT). Figure 1 The terminal device in the "terminal device" can be a mobile phone, tablet computer, or computer with wireless transceiver capabilities. It can also be a virtual reality (VR) terminal, augmented reality (AR) terminal, wireless terminal used in industrial control, wireless terminal used in autonomous driving, wireless terminal used in telemedicine, wireless terminal used in smart grids, wireless terminal used in smart cities, wireless terminal used in smart homes, in-vehicle terminal, vehicle-to-vehicle (V2V) communication capability, intelligent connected vehicle, drone with UAV-to-UAV (U2U) communication capability, and so on, without limitation.

[0148] Figure 1 The network equipment in the system may include an access network device and a flight platform, wherein the access network device may be carried on the flight platform; or, the access network device may be distributedly carried on the flight platform based on a distributed unit (DU); or, the access network device may also be set on the ground, and the terminal device and the access network device may communicate by forwarding signals through the flight platform.

[0149] For example, refer to Figure 1c ,When the access network equipment is carried on the flight platform, Figure 1 The communication system shown can be Figure 1c The communication architecture shown in Figure 1c As shown, the access network device and the flight platform move synchronously, and the access network device and the flight platform can be regarded as a whole.

[0150] Reference Figure 1d ,When the access network equipment is distributed and carried on the flight platform based on DU, Figure 1 The communication system shown can be Figure 1d The communication architecture shown in Figure 1d As shown, the access network device may include an access network device DU and an access network device central unit (CU). The access network device DU may be carried on a flight platform, and the access network device CU may be set on the ground. The terminal device may establish a communication connection with the access network device CU through the access network device DU. It should be noted that Figure 1d The communication architecture in can be seen as Figure 1c A special case of the communication architecture shown.

[0151] Reference Figure 1e , when the access network equipment is set up on the ground, Figure 1 The communication system shown can be Figure 1e The communication architecture shown in Figure 1e As shown, the terminal device and the access network device can communicate through the flight platform to forward signals. Specifically, the flight platform can provide the terminal device with a wireless access transmission / reception point (TRP). The TRP can transparently transmit data between the terminal device and the access network device, thereby achieving a communication connection between the terminal device and the access network device.

[0152] The above-mentioned access network equipment can be any device with wireless transceiver functions, which is mainly used to implement wireless physical control functions, resource scheduling and wireless resource management, wireless access control and mobility management functions. Specifically, the network device can be a device that supports wired access or a device that supports wireless access. Exemplarily, the network device can be an access network (AN) / radio access network (RAN) device, which is composed of multiple 5G-AN / 5G-RAN nodes. 5G-AN / 5G-RAN nodes can be: access point (AP), base station (nodeB, NB), enhanced base station (enhance nodeB, eNB), next generation base station (NR nodeB, gNB), transmission reception point (TRP), transmission point (TP) or some other access node.

[0153] The flight platform may be a satellite, a drone, or other aircraft. For example, depending on the altitude of the flight platform, the flight platform may include a low-orbit satellite, a medium-orbit satellite, a geosynchronous orbit satellite, an unmanned aerial system platform, or a high-orbit satellite.

[0154] In addition, the above Figure 1c to Figure 1e In the embodiment, the communication system may further include a core network device and a data network (DN), wherein the terminal device may communicate with the data network through the network device and the core network device.

[0155] The core network equipment can be used to send the data of the terminal device sent by the network equipment to the data network. Specifically, the core network equipment may include mobility management network elements, session management network elements, policy control network elements, user plane network elements, application function network elements and other network elements, without limitation.

[0156] The data network may be a carrier network that provides data transmission services to the terminal device, such as a carrier network that provides IP Multimedia Service (IMS) to the terminal device. An application server (AS) may be deployed in the DN to provide data transmission services to the terminal device.

[0157] When implementing it specifically, Figure 1 As shown, for example, each terminal device and network device can use Figure 2 The structure shown, or including Figure 2 Parts shown. Figure 2This is a schematic diagram of the composition of a communication device 200 provided in an embodiment of the present application. The communication device 200 can be a terminal device or a chip or system on chip in a terminal device; it can also be a network device or a chip or system on chip in a network device. Figure 2 As shown, the communication device 200 includes a processor 201 , a transceiver 202 and a communication line 203 .

[0158] Furthermore, the communication device 200 may further include a memory 204 , wherein the processor 201 , the memory 204 and the transceiver 202 may be connected via a communication line 203 .

[0159] The processor 201 is a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 201 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.

[0160] Transceiver 202 is used to communicate with other devices or other communication networks. The other communication networks may be Ethernet, radio access networks (RAN), wireless local area networks (WLAN), etc. Transceiver 202 may be a module, circuit, transceiver, or any device capable of communication.

[0161] The communication line 203 is used to transmit information between the components included in the communication device 200.

[0162] The memory 204 is used to store instructions, where the instructions may be computer programs.

[0163] The memory 204 may be a read-only memory (ROM) or other type of static storage device that can store static information and / or instructions, or a random access memory (RAM) or other type of dynamic storage device that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0164] It should be noted that the memory 204 can exist independently of the processor 201 or can be integrated with the processor 201. The memory 204 can be used to store instructions, program code, or some data. The memory 204 can be located within the communication device 200 or outside the communication device 200, without limitation. The processor 201 is configured to execute the instructions stored in the memory 204 to implement the method for obtaining transmission parameters provided in the following embodiments of the present application.

[0165] In one example, the processor 201 may include one or more CPUs, such as Figure 2 CPU0 and CPU1 in.

[0166] As an optional implementation, the communication device 200 includes multiple processors, for example, Figure 2 In addition to the processor 201, a processor 207 may also be included.

[0167] As an optional implementation, the communication apparatus 200 further includes an output device 205 and an input device 206. For example, the input device 206 is a keyboard, a mouse, a microphone, a joystick, or the like, and the output device 205 is a display screen, a speaker, or the like.

[0168] It should be noted that the communication device 200 can be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system or a computer with a plurality of CPUs. Figure 2 In addition, Figure 3 The structure shown in the figure does not constitute a limitation on the communication device, except Figure 2 In addition to the components shown, the communication device may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0169] In the embodiment of the present application, the chip system can be composed of chips, or can include chips and other discrete devices.

[0170] In addition, the actions and terms involved in the various embodiments of this application can refer to each other without limitation. The message names or parameter names in the messages exchanged between the various devices in the embodiments of this application are only examples, and other names can also be used in specific implementations without limitation.

[0171] The following combination Figure 1 The communication system shown in the figure describes the method for obtaining transmission parameters provided in the embodiment of the present application, wherein the terminal device can be any terminal device in the communication system, and the network device can be any network device that communicates with the terminal device in the communication system. The terminal device and the network device described in the following embodiments can all have Figure 2 Parts shown.

[0172] Among them, when the terminal device is in idle state, the terminal device and the network device can use the following Figure 3 The method shown in the figure determines the cell reselection same-frequency and / or different-frequency measurement threshold. When the terminal device is in the connected state, the terminal device and the network device can use the following Figure 4 Alternatively, the terminal device and the network device may also use the following method to determine the wireless link failure threshold: Figure 5 The method shown determines the connected state same-frequency and / or different-frequency measurement thresholds.

[0173] Figure 3 A flow chart of a method for obtaining transmission parameters provided in an embodiment of the present application is shown as follows: Figure 3 As shown, when the terminal device is in an idle state, the method may include:

[0174] Step 301: The terminal device obtains the transmission parameters of the network device.

[0175] In one possible design, the transmission parameters of the network device include the distance between the terminal device and the network device.

[0176] When the terminal device is in an idle state, the terminal device can determine the distance between the terminal device and the network device at a certain moment based on the location information of the network device and the location information of the terminal device.

[0177] Specifically, the terminal device may receive the location information of the network device sent by the network device. Optionally, the location information of the network device is in the transmission parameters sent by the network device.

[0178] For example, when the network device includes a flight platform, the location information of the network device may be ephemeris information. Ephemeris information may be a precise position or trajectory table indicating the time-varying movement of a space vehicle (e.g., a flight platform), describing the position and velocity of the space vehicle. Based on the received ephemeris information, the terminal device can utilize the mathematical relationships between the six orbital parameters in Kepler's laws to determine various parameters of the space vehicle, such as time, position, and velocity.

[0179] It should be noted that the specific description of the terminal device determining the position information of the space flight object based on the ephemeris information can refer to the existing technology and will not be repeated here.

[0180] Specifically, the terminal device may also determine the location information of the terminal device according to its own positioning unit.

[0181] The positioning unit may be a global positioning system (GPS) unit, a Beidou navigation satellite system (BDS) unit, or any other positioning unit that can position the terminal device, without limitation.

[0182] In another possible design, the transmission parameters of the network device include an elevation angle of the network device relative to the center of a service cell corresponding to the terminal device.

[0183] In which, when the terminal device is in an idle state, the terminal device can determine the altitude angle of the network device relative to the center of the service cell corresponding to the terminal device at a certain moment based on the location information of the network device, the location information of the terminal device, and the location information of the center of the service cell corresponding to the terminal device.

[0184] Specifically, the terminal device can determine the location information of the network device and the location information of the terminal device with reference to the above description. The terminal device can also receive the location information of the center of the serving cell sent by the network device. The location information of the center of the serving cell and the location information of the network device can be included in the transmission parameters, or sent to the terminal device separately via two pieces of information.

[0185] For example, refer to Figure 3a , the terminal device UE can receive the location information of the network device and the location information of the coverage center O of the service cell sent by the network device, and determine its own location information. According to the location information of the network device, the location information of the terminal device, and the location information of the coverage center O, the angle α formed by the straight line between the network device and the terminal device and the straight line between the terminal device and the coverage center O is determined as the altitude angle of the network device relative to the center of the service cell corresponding to the terminal device.

[0186] It should be noted that when the absolute value of the difference between the altitude angle value and 90 degrees is smaller, the distance between the terminal device and the network device is closer; when the absolute value of the difference between the altitude angle value and 90 degrees is larger, the distance between the terminal device and the network device is farther.

[0187] Step 302: The terminal device determines the cell reselection intra-frequency and / or inter-frequency measurement threshold according to the transmission parameters.

[0188] Among them, for neighboring cells that are co-frequency cells with the serving cell, the terminal device can determine the cell reselection co-frequency measurement threshold based on the transmission parameters; for neighboring cells that are hetero-frequency cells or hetero-system cells with the serving cell, the terminal device can determine the cell reselection hetero-frequency measurement threshold based on the transmission parameters.

[0189] Specifically, the terminal device can receive a cell list sent by the network device and determine the neighboring cells based on the cell list; the cell list may include the cell information of the service cell and the cell information of the neighboring cells of the service cell, and the cell information may include the cell identification, frequency information, etc., without restriction.

[0190] In one possible design, the transmission parameters include the distance between the terminal device and the network device, and the terminal device determines the cell reselection same-frequency and / or different-frequency measurement threshold based on the change in distance per unit time.

[0191] Exemplarily, when the change in distance per unit time is less than or equal to a first threshold, the terminal device may use the first threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold; or, when the change in distance per unit time is greater than the first threshold, the terminal device may use the second threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold; wherein the first threshold is less than the second threshold.

[0192] The unit time may be the difference between the times when the terminal device determines the distance between the terminal device and the network device twice in a row. When the terminal device periodically determines the distance between the terminal device and the network device, the unit time may also be described as the period during which the terminal device determines the distance between the terminal device and the network device.

[0193] For example, taking the time corresponding to the first time the terminal device determines the distance between the terminal device and the network device as t1, and the time corresponding to the second time the terminal device determines the distance between the terminal device and the network device as t2, the terminal device can determine (t2-t1) as the unit time.

[0194] For another example, taking the example of the terminal device determining the distance between the terminal device and the network device with a period of 10 seconds, the terminal device may determine 10 seconds as the unit time.

[0195] Based on the above description of unit time, the change in distance per unit time can be described as the difference between the distance between the terminal device and the network device determined by the terminal device for the second time and the distance between the terminal device and the network device determined by the terminal device for the first time within the unit time. When the terminal device periodically determines the distance between the terminal device and the network device, the change in distance per unit time can also be described as the difference between the distance between the terminal device and the network device determined by the terminal device in the current period and the distance between the terminal device and the network device determined by the terminal device in the previous period.

[0196] For example, assuming the distance between the terminal device and the network device is D, and the unit time is (t2-t1) as described above, assuming the terminal device determines the distance between the terminal device and the network device as D1 at time t1 and D2 at time t2, the terminal device can use (D2-D1) as the change in distance per unit time (t2-t1). Alternatively, the terminal device can use the ratio of (D2-D1) to (t2-t1), i.e., (D2-D1) / (t2-t1), as the change in distance per unit time, where the unit time can be understood as 1 second or other time lengths.

[0197] For another example, taking the distance between the terminal device and the network device as D, and the terminal device determining the distance between the terminal device and the network device with a period of 10s as an example, assuming that the terminal device determines the distance between the terminal device and the network device as D2 in the current period, and determines the distance between the terminal device and the network device as D1 in the previous period, the terminal device can use (D2-D1) as the change in distance within a unit time of 10s.

[0198] Specifically, the terminal device may determine the change in distance per unit time based on the distance between the terminal device and the network device in step 301 .

[0199] Specifically, the terminal device can determine whether the distance between the terminal device and the network device is getting closer or farther away based on the change in distance per unit time and a first threshold. When the change in distance per unit time is less than or equal to the first threshold, it can be determined that the distance between the terminal device and the network device is getting closer; when the change in distance per unit time is greater than the first threshold, it can be determined that the distance between the terminal device and the network device is getting farther away. The first threshold can be 0.

[0200] For example, taking the first threshold as 0, and the terminal device determines that the distance between the terminal device and the network device is 10km at time t1, and determines that the distance between the terminal device and the network device is 8km at time t2, and assuming that the difference between time t2 and time t1 represents unit time, the terminal device can use (8km-10km)=-2km as the change in distance within unit time (t2-t1). Since -2km is less than 0, it can be determined that the distance between the terminal device and the network device is getting closer during the time period from t1 to t2.

[0201] For another example, taking the first threshold as 0, and the terminal device determines that the distance between the terminal device and the network device is 8km at time t2, and determines that the distance between the terminal device and the network device is 15km at time t3, the terminal device can use (15km-8km)=7km as the change in distance within the unit time (t3-t2). Since 7km is greater than 0, it can be determined that the distance between the terminal device and the network device is getting farther and farther during the time period from t2 to t3.

[0202] Optionally, the first threshold is greater than 0. When the first threshold is greater than 0, if the change in distance per unit time is greater than the first threshold, it can be determined that the distance between the terminal device and the network device is getting farther and farther.

[0203] For example, taking the first threshold as 2km as an example, assuming that the terminal device determines that the distance between the terminal device and the network device is 7km at time t1, and determines that the distance between the terminal device and the network device is 13km at time t2, the terminal device can use (13km-7km)=6km as the change in distance within the unit time (t2-t1). Since 6km is greater than 2km, it can be determined that the distance between the terminal device and the network device is getting farther and farther during the time period from t1 to t2.

[0204] Optionally, the first threshold is less than 0. When the first threshold is less than 0, if the change in distance per unit time is less than or equal to the first threshold, it can be determined that the distance between the terminal device and the network device is getting closer.

[0205] For example, taking the first threshold of -2km as an example, assuming that the terminal device determines that the distance between the terminal device and the network device is 7km at time t1, and determines that the distance between the terminal device and the network device is 4km at time t2, the terminal device can use (4km-7km)=-3km as the change in distance within the unit time (t2-t1). Since -3km is less than -2km, it can be determined that the distance between the terminal device and the network device is getting closer during the time period from t1 to t2.

[0206] It should be noted that, when the unit time is constant, the greater the absolute value of the distance change within the unit time, the faster the distance between the terminal device and the network device changes.

[0207] When the distance between the terminal device and the network device is getting closer, the terminal device can use a first threshold with a lower threshold as the cell reselection intra-frequency and / or inter-frequency measurement threshold, thereby preventing the terminal device from triggering the cell reselection intra-frequency and / or inter-frequency measurement too early, which is beneficial to energy saving of the terminal device. When the distance between the terminal device and the network device is getting farther, the terminal device can use a second threshold with a higher threshold as the cell reselection intra-frequency and / or inter-frequency measurement threshold, thereby preventing the terminal device from triggering the cell reselection intra-frequency and / or inter-frequency measurement too late, thereby improving the reliability of the communication system.

[0208] Exemplarily, the terminal device may determine the first threshold and the second threshold in any one of the following ways:

[0209] Method 1: The first threshold and the second threshold are pre-configured.

[0210] Optionally, the terminal device receives the first threshold and the second threshold sent by the network device.

[0211] Specifically, the terminal device may receive system information (SI) sent by the network device, where the SI includes a first threshold and a second threshold.

[0212] Alternatively, the terminal device determines the first threshold or the second threshold according to a preconfigured communication protocol.

[0213] It should be noted that for neighboring cells that are co-frequency cells with the serving cell, the first and second thresholds are both co-frequency measurement thresholds for cell terminals. For neighboring cells that are inter-frequency cells or inter-system cells with the serving cell, the first and second thresholds are both inter-frequency measurement thresholds for cell reselection.

[0214] Method 2: The first threshold and the second threshold are determined by the terminal device through calculation.

[0215] The terminal device may determine the first threshold and the second threshold according to a preset measurement threshold and an offset.

[0216] Specifically, the terminal device may use the difference between the preset measurement threshold and the offset as the first threshold, and the sum of the preset measurement threshold and the offset as the second threshold; or, the terminal device may use the difference between the preset measurement threshold and the offset as the first threshold, and the preset measurement threshold as the second threshold; or, the terminal device may use the preset measurement threshold as the first threshold, and the sum of the preset measurement threshold and the offset as the second threshold, without restriction.

[0217] Optionally, the terminal device receives a preset measurement threshold sent by the network device; or, the terminal device determines the preset measurement threshold according to a pre-configured communication protocol; or, the terminal device determines the preset measurement threshold on its own without restriction.

[0218] Optionally, the terminal device receives the offset sent by the network device; or, the terminal device determines the offset according to a pre-configured communication protocol; or the terminal device determines the offset on its own without restriction.

[0219] Optionally, the preset threshold value and the offset may be sent in the same message, or may be sent to the terminal device via different messages.

[0220] It should be noted that for neighboring cells that are co-frequency cells with the serving cell, the preset measurement threshold is the preset co-frequency measurement threshold, the offset is the co-frequency offset, and the calculated first and second thresholds are both co-frequency measurement thresholds for cell reselection. For neighboring cells that are inter-frequency cells or inter-system cells with the serving cell, the preset measurement threshold is the preset inter-frequency measurement threshold, the offset is the inter-frequency offset, and the calculated first and second thresholds are both inter-frequency measurement thresholds for cell reselection.

[0221] When determining the first threshold and the second threshold, the terminal device can obtain the first threshold 1 and the second threshold 1 based on the preset same-frequency measurement threshold and the same-frequency offset, and obtain the first threshold 2 and the second threshold 2 based on the preset different-frequency measurement threshold and the different-frequency offset, wherein the first threshold 1 and the second threshold 1 are the cell reselection same-frequency measurement thresholds, and the first threshold 2 and the second threshold 2 are the cell reselection different-frequency measurement thresholds.

[0222] In another possible design, the transmission parameters include an elevation angle of the network device relative to the center of the service cell corresponding to the terminal device, and the terminal device determines the cell reselection same-frequency and / or different-frequency measurement threshold based on the elevation angle.

[0223] Specifically, the terminal device can determine the cell reselection co-frequency and / or inter-frequency measurement threshold corresponding to the current elevation angle based on the elevation angle of the network device relative to the center of the service cell from the pre-stored mapping relationship between the elevation angle and the cell reselection co-frequency and / or inter-frequency measurement threshold.

[0224] Exemplarily, referring to Table 3 below, the terminal may pre-store a mapping relationship between the elevation angle range and the cell reselection intra-frequency and / or inter-frequency measurement threshold.

[0225] Table 3

[0226] Altitude angle range 1 Cell reselection intra-frequency and / or inter-frequency measurement threshold 1 Altitude angle range 2 Cell reselection intra-frequency and / or inter-frequency measurement threshold 2 Altitude angle range 3 Cell reselection intra-frequency and / or inter-frequency measurement threshold 3 Altitude range 4 Cell reselection intra-frequency and / or inter-frequency measurement threshold 4

[0227] Among them, the mapping relationship between the elevation angle and the cell reselection co-frequency and / or inter-frequency measurement threshold may include a mapping relationship between the elevation angle and the cell reselection co-frequency measurement threshold, and / or a mapping relationship between the elevation angle and the cell reselection inter-frequency measurement threshold. For a neighboring cell that is a co-frequency cell with the serving cell, the terminal device may determine the cell reselection co-frequency measurement threshold corresponding to the current elevation angle based on the mapping relationship between the elevation angle and the cell reselection co-frequency measurement threshold. For a neighboring cell that is an inter-frequency cell with the serving cell, the terminal device may determine the cell reselection inter-frequency measurement threshold corresponding to the current elevation angle based on the mapping relationship between the elevation angle and the cell reselection inter-frequency measurement threshold.

[0228] Optionally, the terminal device receives and stores the mapping relationship between the elevation angle and the cell reselection co-frequency and / or inter-frequency measurement threshold sent by the network device; or, the terminal device determines and stores the mapping relationship between the elevation angle and the cell reselection co-frequency and / or inter-frequency measurement threshold according to a pre-configured communication protocol.

[0229] The terminal may receive system information sent by the network device and determine a mapping relationship between the elevation angle and the cell reselection co-frequency and / or inter-frequency measurement threshold based on the system information. The system information includes a mapping relationship between the elevation angle and the cell reselection co-frequency and / or inter-frequency measurement threshold.

[0230] It should be noted that the terminal device can determine the distance between the terminal device and the network device, or the changing trend of the distance, based on the altitude angle. When the absolute value of the difference between the altitude angle value and 90 degrees is smaller, the distance between the terminal device and the network device is closer; when the absolute value of the difference between the altitude angle value and 90 degrees is larger, the distance between the terminal device and the network device is farther. When the absolute value of the difference between the altitude angle value and 90 degrees gradually decreases, the distance between the terminal device and the network device is getting closer; when the absolute value of the difference between the altitude angle value and 90 degrees gradually increases, the distance between the terminal device and the network device is getting farther.

[0231] For example, taking the example of the elevation angle determined by the terminal device at time t1 being 60° and the elevation angle determined at time t2 being 30°, since |60°-90°|<|30°-90°|, the terminal device can determine that compared to time t1, the distance between the terminal device and the network device at time t2 is farther, and during the time period from t1 to t2, the distance between the terminal device and the network device is getting farther and farther.

[0232] For another example, taking the altitude angle determined by the terminal device at time t2 as 30° and the altitude angle determined at time t3 as 90°, since |30°-90°|>|90°-90°|, the terminal device can determine that compared to time t2, the distance between the terminal device and the network device at time t3 is closer, and in the time period from t2 to t3, the distance between the terminal device and the network device is getting closer and closer.

[0233] When the absolute value of the difference between the elevation angle value and 90 degrees is smaller, the cell reselection co-frequency and / or inter-frequency measurement threshold can be set lower, thereby preventing the terminal device from triggering the cell reselection co-frequency and / or inter-frequency measurement too early, which is beneficial to energy saving of the terminal device. When the absolute value of the difference between the elevation angle value and 90 degrees is larger, the cell reselection co-frequency and / or inter-frequency measurement threshold can be set higher, thereby preventing the terminal device from triggering the cell reselection co-frequency and / or inter-frequency measurement too late, thereby improving the reliability of the communication system.

[0234] When the elevation angle value gradually approaches 90 degrees, that is, the absolute value of the difference between the elevation angle value and 90 degrees gradually becomes smaller, the cell reselection co-frequency and / or inter-frequency measurement threshold can be set lower, thereby preventing the terminal device from triggering the cell reselection co-frequency and / or inter-frequency measurement too early, which is beneficial to energy saving of the terminal device. When the elevation angle value gradually moves away from 90 degrees, that is, the absolute value of the difference between the elevation angle value and 90 degrees gradually becomes larger, the cell reselection co-frequency and / or inter-frequency measurement threshold can be set higher, thereby preventing the terminal device from triggering the cell reselection co-frequency and / or inter-frequency measurement too late, thereby improving the reliability of the communication system.

[0235] Step 303: The terminal device determines whether to trigger cell reselection intra-frequency and / or inter-frequency measurement according to the cell reselection intra-frequency and / or inter-frequency measurement threshold.

[0236] Among them, the terminal device can determine whether to trigger cell reselection co-frequency and / or inter-frequency measurement based on the above description of cell reselection and the channel state measured by the terminal device in the serving cell and the cell reselection co-frequency and / or inter-frequency measurement threshold.

[0237] Specifically, the terminal device may trigger cell reselection intra-frequency and / or inter-frequency measurement when the channel status of the terminal device is lower than a cell reselection intra-frequency and / or inter-frequency measurement threshold.

[0238] Based on the above Figure 3 With the method shown, a terminal device can dynamically determine the cell reselection co-frequency and / or inter-frequency measurement threshold based on the network device's location information, improving the flexibility of determining the cell reselection co-frequency and / or inter-frequency measurement threshold. By appropriately adopting different thresholds in different network device location scenarios, the terminal device can avoid triggering cell reselection co-frequency and / or inter-frequency measurements too early or too late. This improves the reliability of the communication system while also facilitating energy conservation for the terminal device.

[0239] above Figure 3In the method shown, the terminal device can determine whether to trigger cell reselection co-frequency and / or inter-frequency measurement based on the channel state of the terminal device and the cell reselection co-frequency and / or inter-frequency measurement threshold based on the above step 303. The terminal device can also determine whether to trigger cell reselection co-frequency and / or inter-frequency measurement based on the location of the terminal device in the serving cell based on the following step 304; or the terminal device can also determine whether to trigger cell reselection co-frequency and / or inter-frequency measurement based on the cell reselection co-frequency and / or inter-frequency measurement threshold based on the distance between the network device and the center of the serving cell based on the following step 305.

[0240] Step 304: The terminal device determines whether to trigger cell reselection intra-frequency and / or inter-frequency measurement based on the location of the terminal device in the serving cell.

[0241] Specifically, the terminal device may trigger cell reselection for same-frequency and / or different-frequency measurements when the terminal device is located at the edge of a serving cell.

[0242] Exemplarily, the terminal device may determine whether the terminal device is located at the edge of the serving cell based on the location information of the terminal device and the coverage information of the serving cell (eg, the location information of the center of the serving cell and the coverage radius of the serving cell).

[0243] For example, refer to Figure 3b The terminal device UE can determine the distance d between the terminal device UE and the coverage center O of the service cell based on the location information of the terminal device UE and the location information of the coverage center O of the service cell, and when the distance d is greater than a preset threshold, it is determined that the terminal device is located at the edge of the service cell, wherein the preset threshold is less than or equal to the coverage radius r of the service cell.

[0244] Optionally, the terminal device receives coverage information of the service cell sent by the network device, wherein the coverage information of the service cell includes location information of the center of the service cell and the coverage radius of the service cell.

[0245] Among them, the terminal device can determine the coverage information of the service cell based on the system information sent by the network device.

[0246] Optionally, the terminal device receives a preset threshold corresponding to the service cell sent by the network device.

[0247] Among them, the terminal device can determine the preset threshold of the service cell based on the broadcast message sent by the network device.

[0248] Optionally, the terminal device also determines the coverage information of the serving cell and / or the preset threshold of the serving cell according to a pre-configured communication protocol.

[0249] Based on the above step 304, the terminal device can trigger the cell reselection of co-frequency and / or inter-frequency measurement when the terminal device is located at the edge of the service cell, avoiding unnecessary power consumption caused by the inability to find a suitable neighboring cell when the terminal device starts the cell reselection of co-frequency and / or inter-frequency measurement in the center of the service cell, thereby facilitating energy saving of the terminal device. At the same time, it can also save the number of times the terminal device triggers the cell reselection of co-frequency and / or inter-frequency measurement, improve the flexibility of the cell reselection of co-frequency and / or inter-frequency measurement, and improve the efficiency of the cell reselection of co-frequency and / or inter-frequency measurement.

[0250] Step 305: The terminal device determines whether to trigger cell reselection intra-frequency and / or inter-frequency measurement based on the distance between the network device and the center of the serving cell and the cell reselection intra-frequency and / or inter-frequency measurement threshold.

[0251] Specifically, the terminal device can determine whether to trigger cell reselection co-frequency and / or inter-frequency measurement according to the cell reselection co-frequency and / or inter-frequency measurement threshold when the distance between the network device and the center of the serving cell is minimum.

[0252] Exemplarily, the terminal device may record the location information of the network device based on the location information of the network device and the location information of the center of the service cell when the distance between the network device and the center of the service cell is minimum. When the network device moves to the position corresponding to the location information, it determines whether to trigger cell reselection of co-frequency and / or inter-frequency measurement based on the current channel status and the cell reselection co-frequency and / or inter-frequency measurement threshold.

[0253] For example, refer to Figure 1a Taking the network device set on the satellite as an example, assuming that the terminal device determines that the distance between the network device and the center of the service cell is the minimum based on the location information of the network device and the location information of the center of the service cell, the network device is located at point B. Then, each time the network device moves to point B, the terminal device can determine whether to trigger cell reselection co-frequency and / or inter-frequency measurement based on the channel state measured at point B and the cell reselection co-frequency and / or inter-frequency measurement threshold.

[0254] In another example, when the network device moves periodically, the terminal device can record the current position in the cycle when the distance between the network device and the center of the serving cell is minimized based on the location information of the network device and the location information of the center of the serving cell. When the network device moves periodically, it can determine whether to trigger cell reselection co-frequency and / or inter-frequency measurement based on the position in the cycle corresponding to the moment when the distance between the network device and the center of the serving cell is minimized, the channel state corresponding to the position, and the cell reselection co-frequency and / or inter-frequency measurement threshold.

[0255] For example, taking the network device performing periodic movement according to a 10-hour cycle as an example, assuming that the network device is closest to the center of the service cell at the 5th hour of each cycle, the network device can determine whether to trigger cell reselection co-frequency and / or inter-frequency measurement at the 5th hour of each cycle based on the channel state measured at that moment and the cell reselection co-frequency and / or inter-frequency measurement threshold.

[0256] Based on the above step 305, the terminal device can determine whether to trigger cell reselection of co-frequency and / or inter-frequency measurement according to the cell reselection co-frequency and / or inter-frequency measurement threshold when the distance between the network device and the center of the service cell is the shortest, thereby saving the number of times the terminal device triggers cell reselection of co-frequency and / or inter-frequency measurement, improving the flexibility of cell reselection of co-frequency and / or inter-frequency measurement, and improving the efficiency of cell reselection of co-frequency and / or inter-frequency measurement.

[0257] It should be noted that the terminal device can determine whether to trigger cell reselection intra-frequency and / or inter-frequency measurement based on one or more of the above steps 303, 304 or 305, without limitation.

[0258] When the terminal device determines whether to trigger cell reselection of same-frequency and / or different-frequency measurements based on multiple methods in the above-mentioned steps 303, 304 or 305, there is no restriction on the order of execution between the at least two steps used to determine whether to trigger cell reselection of same-frequency and / or different-frequency measurements. Part of the at least two steps can be executed first, and then the remaining steps of the at least two steps can be executed, or the at least two steps can be executed simultaneously without restriction.

[0259] Based on the above Figure 3 The method shown, such as Figure 3c As shown, the above steps 301 and 302 can also be replaced by the following steps 301a and 302a, that is, the terminal device can determine the cell reselection same-frequency and / or different-frequency measurement threshold based on the channel status of the terminal device in the service cell based on the following steps 301a and 302a.

[0260] Figure 3c A flow chart of a method for obtaining transmission parameters provided in an embodiment of the present application is shown as follows: Figure 3c As shown, when the terminal device is in an idle state, the method may include:

[0261] Step 301a: The terminal device measures the channel state of the terminal device in the serving cell.

[0262] Among them, the channel status may include one or more parameters such as RSRP, RSRQ, SNR, SINR, etc., and may also include other parameters used to indicate the channel status of the terminal device in the serving cell, without limitation.

[0263] Specifically, the specific process of the terminal device measuring the channel state can refer to the process of the terminal device measuring the channel state in the prior art, and will not be described in detail.

[0264] Step 302a: The terminal device determines the cell reselection intra-frequency and / or inter-frequency measurement threshold according to the channel status.

[0265] Specifically, the terminal device may determine the cell reselection same-frequency / different-frequency measurement threshold according to the amount of change in the channel state within a unit time.

[0266] Exemplarily, when the amount of change in the channel state per unit time is greater than or equal to the third threshold, the terminal device may use the fifth threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold; or, when the amount of change in the channel state per unit time is less than the third threshold, the terminal device may use the sixth threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold; wherein the fifth threshold is less than the sixth threshold.

[0267] The unit time may be the difference between the times when the terminal device determines the channel state twice in a row. When the terminal device determines the channel state periodically, the unit time may also be described as the period for the terminal device to determine the channel state.

[0268] For example, taking the time corresponding to the first time the terminal device determines the channel state as t1 and the time corresponding to the second time the terminal device determines the channel state as t2, the terminal device can determine (t2-t1) as the unit time.

[0269] For another example, taking the example of the terminal device determining the channel status with a period of 10 seconds, the terminal device may determine 10 seconds as the unit time.

[0270] Based on the above description of unit time, the change in channel state per unit time can be described as the difference between the second channel state determined by the terminal device and the first channel state determined by the terminal device within the unit time. When the terminal device periodically determines the channel state, the change in channel state per unit time can also be described as the difference between the channel state determined by the terminal device in the current period and the channel state determined by the terminal device in the previous period.

[0271] For example, taking RSRP as an example to characterize the channel state of the terminal device, and the unit time being (t2-t1) as mentioned above, assuming that the terminal device determines that the channel state is RSRP1 at time t1 and determines that the channel state is RSRP2 at time t2, the terminal device can use (RSRP2-RSRP1) as the change in the channel state within the unit time (t2-t1).

[0272] For another example, taking RSRP as an example to characterize the channel state of a terminal device, and the terminal device determines the channel state with a period of 10s, assuming that the terminal device determines the channel state to be RSRP2 in the current period and the channel state to be RSRP1 in the previous period, the terminal device can use (RSRP2-RSRP1) as the change in the channel state within a unit time of 10s.

[0273] Specifically, the terminal device may determine the amount of change in the channel state per unit time based on the channel state measured by the terminal device in step 301a above.

[0274] Specifically, the terminal device can determine whether the channel state of the terminal device is getting better or worse based on the change in the channel state per unit time and the third threshold value. When the change in the channel state per unit time is greater than or equal to the third threshold value, it can be determined that the channel state of the terminal device is getting better; when the change in the channel state per unit time is less than the third threshold value, it can be determined that the channel state of the terminal device is getting worse. Among them, the channel state of the terminal device is getting better and better can also be understood as the distance between the terminal device and the network device is getting closer and closer, and the channel state of the terminal device is getting worse and worse can also be understood as the distance between the terminal device and the network device is getting farther and farther, without limitation. The third threshold value can be 0.

[0275] For example, taking the third threshold as 0 and using RSRP to characterize the channel state of the terminal device as an example, assuming that the terminal device determines that the RSRP is 10dBm at time t1 and determines that the RSRP is 8dBm at time t2, the terminal device can use (8dBm-10dBm)=-2dBm as the change in the channel state within the unit time (t2-t1). Since -2dBm is less than 0, it can be determined that the channel state is getting worse in the time period from t1 to t2.

[0276] For another example, taking the third threshold as 0 and using RSRP to characterize the channel state of the terminal device, assuming that the terminal device determines that the RSRP is 8dBm at time t2 and determines that the RSRP is 15dBm at time t3, the terminal device can use (15dBm-8dBm)=7dBm as the change in the channel state within the unit time (t3-t2). Since 7dBm is greater than 0, it can be determined that the channel state is getting better and better in the time period from t2 to t3.

[0277] Optionally, the third threshold is greater than 0. When the third threshold is greater than 0, if the change in the channel state per unit time is greater than the third threshold, it can be determined that the channel state is getting better.

[0278] For example, taking the third threshold as 2dBm and using RSRP to characterize the channel state of the terminal device, assuming that the terminal device determines that the RSRP is 7dBm at time t1 and determines that the RSRP is 13dBm at time t2, the terminal device can use (13dBm-7dBm)=6dBm as the change in the channel state within the unit time (t2-t1). Since 6dBm is greater than 2dBm, it can be determined that the channel state is getting better and better during the time period from t1 to t2.

[0279] Optionally, the third threshold is less than 0. When the third threshold is less than 0, if the change in the channel state per unit time is less than or equal to the third threshold, it can be determined that the channel state is getting worse.

[0280] For example, taking the third threshold as -2dBm and using RSRP to characterize the channel state of the terminal device as an example, assuming that the terminal device determines that the RSRP is 7dBm at time t1 and determines that the RSRP is 4dBm at time t2, the terminal device can use (4dBm-7dBm)=-3dBm as the change in the channel state within the unit time (t2-t1). Since -3dBm is less than -2dBm, it can be determined that the channel state is getting worse in the time period from t1 to t2.

[0281] It should be noted that, when the unit time is constant, the larger the absolute value of the change in the channel state within the unit time, the faster the channel state changes.

[0282] When the channel status of the terminal device is getting better and better, the terminal device can use the fifth threshold with a lower threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold, thereby avoiding the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement too early, which is beneficial to energy saving of the terminal device. When the channel status of the terminal device is getting worse and worse, the terminal device can use the sixth threshold with a higher threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold, thereby avoiding the terminal device triggering the cell reselection co-frequency and / or inter-frequency measurement too late, thereby improving the reliability of the communication system.

[0283] Specifically, the manner in which the terminal device determines the fifth threshold and the sixth threshold may refer to the manner in which the first threshold and the second threshold are determined in step 302, and details thereof will not be repeated.

[0284] Optionally, the first threshold is the same as the fifth threshold, and the second threshold is the same as the sixth threshold.

[0285] It should be noted that the description of the fifth threshold can refer to the description of the first threshold in the above step 302, and the description of the sixth threshold can refer to the description of the second threshold in the above step 302, which will not be repeated here.

[0286] Based on the above Figure 3cWith the illustrated method, a terminal device can dynamically determine the cell reselection intra-frequency and / or inter-frequency measurement threshold based on the terminal device's channel status, thereby increasing flexibility in determining the cell reselection intra-frequency and / or inter-frequency measurement threshold. By appropriately adopting different thresholds based on the terminal device's different channel states, the terminal device can avoid triggering intra-frequency and / or inter-frequency cell reselection measurements too early or too late. This improves communication system reliability while also facilitating energy conservation for the terminal device.

[0287] Figure 4 A flow chart of a method for obtaining transmission parameters provided in an embodiment of the present application is shown as follows: Figure 4 As shown, when the terminal device is in a connected state, the method may include:

[0288] Step 401: The terminal device obtains the transmission parameters of the network device.

[0289] In one possible design, the transmission parameters of the network device include the distance between the terminal device and the network device.

[0290] When the terminal device is in a connected state, the terminal device can determine the distance between the terminal device and the network device at a certain moment based on the location information of the network device and the location information of the terminal device.

[0291] Specifically, the specific description of how the terminal device determines the distance between the terminal device and the network device can refer to the description of how the terminal device determines the distance between the terminal device and the network device in step 301 above, which will not be repeated here.

[0292] Step 402: The terminal device determines a wireless link failure threshold based on the transmission parameters.

[0293] In one possible design, the transmission parameters include the distance between the terminal device and the network device, and the terminal device determines the wireless link failure threshold based on the change in distance per unit time.

[0294] Exemplarily, when the change in distance per unit time is less than or equal to the second threshold, the terminal device may use the third threshold as the wireless link failure threshold; or, when the change in distance per unit time is greater than the second threshold, the terminal device may use the fourth threshold as the wireless link failure threshold; wherein the third threshold is greater than the fourth threshold.

[0295] The description of the unit time and the change of the distance within the unit time may refer to the description of the unit time and the change of the distance within the unit time in step 302 above, and will not be repeated here.

[0296] Specifically, the terminal device may determine the change in distance per unit time based on the distance between the terminal device and the network device in step 401 .

[0297] Specifically, the terminal device may determine whether the distance between the terminal device and the network device is getting closer or farther away based on the change in distance per unit time and a second threshold. When the change in distance per unit time is less than or equal to the second threshold, it can be determined that the distance between the terminal device and the network device is getting closer; when the change in distance per unit time is greater than the second threshold, it can be determined that the distance between the terminal device and the network device is getting farther away. The second threshold may be 0.

[0298] For example, taking the second threshold as 0, and the terminal device determines that the distance between the terminal device and the network device is 10km at time t1, and determines that the distance between the terminal device and the network device is 8km at time t2, the terminal device can use (8km-10km)=-2km as the change in distance within the unit time (t2-t1). Since -2km is less than 0, it can be determined that the distance between the terminal device and the network device is getting closer during the time period from t1 to t2.

[0299] For another example, taking the second threshold as 0, and the terminal device determines that the distance between the terminal device and the network device is 8km at time t2, and determines that the distance between the terminal device and the network device is 15km at time t3, the terminal device can use (15km-8km)=7km as the change in distance within the unit time (t3-t2). Since 7km is greater than 0, it can be determined that the distance between the terminal device and the network device is getting farther and farther during the time period from t2 to t3.

[0300] Optionally, the second threshold is greater than 0. When the second threshold is greater than 0, if the change in distance per unit time is greater than the second threshold, it can be determined that the distance between the terminal device and the network device is getting farther and farther.

[0301] For example, taking the second threshold of 2km as an example, assuming that the terminal device determines that the distance between the terminal device and the network device is 7km at time t1, and determines that the distance between the terminal device and the network device is 13km at time t2, the terminal device can use (13km-7km)=6km as the change in distance within the unit time (t2-t1). Since 6km is greater than 2km, it can be determined that the distance between the terminal device and the network device is getting farther and farther during the time period from t1 to t2.

[0302] Optionally, the second threshold is less than 0. When the second threshold is less than 0, if the change in distance per unit time is less than or equal to the second threshold, it can be determined that the distance between the terminal device and the network device is getting closer.

[0303] For example, taking the second threshold of -2km as an example, assuming that the terminal device determines that the distance between the terminal device and the network device is 7km at time t1, and determines that the distance between the terminal device and the network device is 4km at time t2, the terminal device can use (4km-7km)=-3km as the change in distance within the unit time (t2-t1). Since -3km is less than -2km, it can be determined that the distance between the terminal device and the network device is getting closer during the time period from t1 to t2.

[0304] It should be noted that, when the unit time is constant, the greater the absolute value of the distance change within the unit time, the faster the distance between the terminal device and the network device changes.

[0305] As the distance between the terminal device and the network device decreases, the terminal device may use a third threshold with a higher threshold as the radio link failure threshold, thereby preventing the terminal device from triggering cell reselection and intra-frequency and / or inter-frequency measurements too early, which is beneficial to energy conservation of the terminal device. As the distance between the terminal device and the network device increases, the terminal device may use a fourth threshold with a lower threshold as the radio link failure threshold, thereby preventing the terminal device from triggering cell reselection and intra-frequency and / or inter-frequency measurements too late, which improves the reliability of the communication system.

[0306] Exemplarily, the terminal device may determine the third threshold and the fourth threshold from at least two pre-configured groups of radio link failure thresholds.

[0307] Specifically, when the radio link failure threshold includes a physical layer reporting threshold, the terminal device may determine a group of radio link failure thresholds with lower physical layer reporting thresholds as the third threshold, and determine a group of radio link failure thresholds with higher physical layer reporting thresholds as the fourth threshold. When the radio link failure threshold includes the number of physical layer failure detections and a timer, the terminal device may determine a group of radio link failure thresholds with higher parameters of the number of physical layer failure detections and the timer as the third threshold, and determine a group of radio link failure thresholds with lower parameters of the number of physical layer failure detections and the timer as the fourth threshold. When the radio link failure threshold includes the maximum number of RLC layer retransmissions, the terminal device may determine a group of radio link thresholds with higher maximum number of RLC layer retransmissions as the third threshold, and determine a group of radio link failure thresholds with lower maximum number of RLC layer retransmissions as the fourth threshold. When the wireless link failure threshold includes the maximum number of times the MAC layer random access preamble code is sent, the terminal device can determine a group of wireless link thresholds with a higher maximum number of times the MAC layer random access preamble code is sent as the third threshold, and determine a group of wireless link failure thresholds with a lower maximum number of times the MAC layer random access preamble code is sent as the fourth threshold.

[0308] Optionally, the terminal device receives at least two sets of wireless link failure thresholds sent by the network device.

[0309] The terminal device may determine at least two sets of wireless link failure thresholds based on the system information sent by the network device.

[0310] Step 403: The terminal device determines whether to trigger the radio link failure process according to the radio link failure threshold.

[0311] Among them, the terminal device can determine whether to trigger the radio link failure process based on the above description of the radio link failure process and according to the channel state and radio link failure threshold measured by the terminal device in the serving cell.

[0312] Specifically, the terminal device may trigger a wireless link failure process when the channel status of the terminal device meets a wireless link failure threshold.

[0313] Based on the above Figure 4 With the method shown, terminal devices can dynamically determine the radio link failure threshold based on the location information of network devices, improving flexibility in determining the radio link failure threshold. By appropriately adopting different thresholds in different network device location scenarios, the terminal device can avoid triggering the radio link failure process too early or too late. This improves the reliability of the communication system while also facilitating energy conservation for the terminal device.

[0314] Based on the above Figure 4 The method shown, such as Figure 4a As shown, the above steps 401 and 402 can also be replaced by the following steps 401a and 402a, that is, the terminal device can determine the wireless link failure threshold based on the channel status of the terminal device in the serving cell based on the following steps 401a and 402a.

[0315] Figure 4a A flow chart of a method for obtaining transmission parameters provided in an embodiment of the present application is shown as follows: Figure 4a As shown, when the terminal device is in a connected state, the method may include:

[0316] Step 401a: The terminal device measures the channel state of the terminal device in the serving cell.

[0317] Specifically, the description of step 401a can refer to the specific description of step 301a above, and will not be repeated here.

[0318] Step 402a: The terminal device determines a wireless link failure threshold according to the channel status.

[0319] Specifically, the terminal device may determine the wireless link failure threshold according to the amount of change in the channel state per unit time.

[0320] Exemplarily, when the change in the channel state per unit time is greater than or equal to the fourth threshold, the terminal device may use the seventh threshold as the wireless link failure threshold; or, when the change in the channel state per unit time is less than the fourth threshold, the terminal device may use the eighth threshold as the wireless link failure threshold; wherein the seventh threshold is greater than the eighth threshold.

[0321] The description of the unit time and the description of the change amount of the channel state within the unit time may refer to the description of the unit time and the change amount of the channel state within the unit time in the above step 302a, and will not be repeated here.

[0322] Specifically, the terminal device may determine the amount of change in the channel state per unit time based on the channel state measured by the terminal device in step 401a.

[0323] Specifically, the terminal device can determine whether the channel state of the terminal device is getting better or worse based on the change in the channel state per unit time and the fourth threshold. When the change in the channel state per unit time is greater than or equal to the fourth threshold, it can be determined that the channel state of the terminal device is getting better; when the change in the channel state per unit time is less than the fourth threshold, it can be determined that the channel state of the terminal device is getting worse. Among them, the channel state of the terminal device is getting better and better can also be understood as the distance between the terminal device and the network device is getting closer and closer, and the channel state of the terminal device is getting worse and worse can also be understood as the distance between the terminal device and the network device is getting farther and farther, without limitation. The fourth threshold can be 0.

[0324] For example, taking the fourth threshold as 0 and using RSRP to characterize the channel state of the terminal device as an example, assuming that the terminal device determines that the RSRP is 10dBm at time t1 and determines that the RSRP is 8dBm at time t2, the terminal device can use (8dBm-10dBm)=-2dBm as the change in the channel state within the unit time (t2-t1). Since -2dBm is less than 0, it can be determined that the channel state is getting worse during the time period from t1 to t2.

[0325] For another example, taking the fourth threshold as 0 and using RSRP to characterize the channel state of the terminal device, assuming that the terminal device determines that the RSRP is 8dBm at time t2 and determines that the RSRP is 15dBm at time t3, the terminal device can use (15dBm-8dBm)=7dBm as the change in the channel state within the unit time (t3-t2). Since 7dBm is greater than 0, it can be determined that the channel state is getting better and better in the time period from t2 to t3.

[0326] Optionally, the fourth threshold is greater than 0. When the fourth threshold is greater than 0, if the change in the channel state per unit time is greater than the fourth threshold, it can be determined that the channel state is getting better.

[0327] For example, taking the fourth threshold as 2dBm and using RSRP to characterize the channel state of the terminal device as an example, assuming that the terminal device determines that the RSRP is 7dBm at time t1 and determines that the RSRP is 13dBm at time t2, the terminal device can use (13dBm-7dBm)=6dBm as the change in the channel state within the unit time (t2-t1). Since 6dBm is greater than 2dBm, it can be determined that the channel state is getting better and better during the time period from t1 to t2.

[0328] Optionally, the fourth threshold is less than 0. When the fourth threshold is less than 0, if the change in the channel state per unit time is less than or equal to the fourth threshold, it can be determined that the channel state is getting worse.

[0329] For example, taking the fourth threshold as -2dBm and using RSRP to characterize the channel state of the terminal device as an example, assuming that the terminal device determines that the RSRP is 7dBm at time t1 and determines that the RSRP is 4dBm at time t2, the terminal device can use (4dBm-7dBm)=-3dBm as the change in the channel state within the unit time (t2-t1). Since -3dBm is less than -2dBm, it can be determined that the channel state is getting worse in the time period from t1 to t2.

[0330] It should be noted that, when the unit time is constant, the larger the absolute value of the change in the channel state within the unit time, the faster the channel state changes.

[0331] As the terminal device's channel status improves, the terminal device can use the higher seventh threshold as the radio link failure threshold, thereby preventing the terminal device from triggering radio link failure too early and facilitating energy conservation. As the terminal device's channel status deteriorates, the terminal device can use the lower eighth threshold as the radio link failure threshold, thereby preventing the terminal device from triggering radio link failure too late and improving the reliability of the communication system.

[0332] Specifically, the manner in which the terminal device determines the seventh threshold and the eighth threshold may refer to the manner in which the fourth threshold and the fifth threshold are determined in step 402, and details thereof will not be repeated.

[0333] Optionally, the fourth threshold is the same as the seventh threshold, and the fifth threshold is the same as the eighth threshold.

[0334] It should be noted that the description of the seventh threshold can refer to the description of the fourth threshold in the above step 402, and the description of the eighth threshold can refer to the description of the fifth threshold in the above step 402, which will not be repeated here.

[0335] Based on the above Figure 4aWith the illustrated method, a terminal device can dynamically determine a radio link failure threshold based on its channel status, improving flexibility in determining the radio link failure threshold. By appropriately using different thresholds based on the terminal device's channel status, the terminal device can avoid triggering the radio link failure process too early or too late. This improves communication system reliability while also facilitating energy conservation.

[0336] Figure 5 A flow chart of a method for obtaining transmission parameters provided in an embodiment of the present application is shown as follows: Figure 5 As shown, when the terminal device is in a connected state, the method may include:

[0337] Step 501: The terminal device obtains the transmission parameters of the network device.

[0338] In one possible design, the transmission parameters of the network device include an elevation angle of the network device relative to the center of a service cell corresponding to the terminal device.

[0339] In which, when the terminal device is in a connected state, the terminal device can determine the altitude angle of the network device relative to the center of the service cell corresponding to the terminal device at a certain moment based on the location information of the network device, the location information of the terminal device, and the location information of the center of the service cell corresponding to the terminal device.

[0340] Specifically, the specific description of the terminal device determining the elevation angle of the network device relative to the center of the service cell corresponding to the terminal device can refer to the description of the terminal device determining the elevation angle of the network device relative to the center of the service cell corresponding to the terminal device in the above step 301, and will not be repeated here.

[0341] Step 502: The terminal device determines the connected state same-frequency and / or different-frequency measurement threshold according to the transmission parameters.

[0342] Specifically, the terminal device can determine the connection state same-frequency and / or different-frequency measurement threshold corresponding to the current elevation angle based on the elevation angle of the network device relative to the center of the service cell from the pre-stored mapping relationship between the elevation angle and the connection state same-frequency and / or different-frequency measurement threshold.

[0343] Exemplarily, referring to Table 4 below, the terminal may pre-store a mapping relationship between the elevation angle range and the connected state same-frequency and / or different-frequency measurement thresholds.

[0344] Table 4

[0345] Altitude angle range 1 Connected state same-frequency and / or different-frequency measurement threshold 1 Altitude angle range 2 Connected state same-frequency and / or different-frequency measurement threshold 2 Altitude angle range 3 Connected state same-frequency and / or different-frequency measurement threshold 3 Altitude range 4 Connected state same-frequency and / or different-frequency measurement threshold 4

[0346] Among them, the mapping relationship between the elevation angle and the connection state same-frequency and / or different-frequency measurement threshold may include the mapping relationship between the elevation angle and the connection state same-frequency measurement threshold, and / or the mapping relationship between the elevation angle and the connection state different-frequency measurement threshold. For a neighboring cell that is a same-frequency cell as the serving cell, the terminal device can determine the connection state same-frequency measurement threshold corresponding to the current elevation angle based on the mapping relationship between the elevation angle and the connection state same-frequency measurement threshold. For a neighboring cell that is a different-frequency cell or a different-system cell as the serving cell, the terminal device can determine the connection state different-frequency measurement threshold corresponding to the current elevation angle based on the mapping relationship between the elevation angle and the connection state different-frequency measurement threshold.

[0347] Optionally, the terminal device receives and stores the mapping relationship between the elevation angle and the connection state same-frequency and / or different-frequency measurement threshold sent by the network device; or, the terminal device determines and stores the mapping relationship between the elevation angle and the connection state same-frequency and / or different-frequency measurement threshold according to a pre-configured communication protocol.

[0348] The terminal may receive system information sent by the network device and determine a mapping relationship between the elevation angle and the connection state same-frequency and / or different-frequency measurement thresholds based on the system information. The system information includes a mapping relationship between the elevation angle and the connection state same-frequency and / or different-frequency measurement thresholds.

[0349] It should be noted that the terminal device can determine the distance between the terminal device and the network device, or the changing trend of the distance, based on the altitude angle. When the absolute value of the difference between the altitude angle value and 90 degrees is smaller, the distance between the terminal device and the network device is closer; when the absolute value of the difference between the altitude angle value and 90 degrees is larger, the distance between the terminal device and the network device is farther. When the absolute value of the difference between the altitude angle value and 90 degrees gradually decreases, the distance between the terminal device and the network device is getting closer; when the absolute value of the difference between the altitude angle value and 90 degrees gradually increases, the distance between the terminal device and the network device is getting farther.

[0350] For example, taking the example of the elevation angle determined by the terminal device at time t1 being 60° and the elevation angle determined at time t2 being 30°, since |60°-90°|<|30°-90°|, the terminal device can determine that compared to time t1, the distance between the terminal device and the network device at time t2 is farther, and during the time period from t1 to t2, the distance between the terminal device and the network device is getting farther and farther.

[0351] For another example, taking the altitude angle determined by the terminal device at time t2 as 30° and the altitude angle determined at time t3 as 90°, since |30°-90°|>|90°-90°|, the terminal device can determine that compared to time t2, the distance between the terminal device and the network device at time t3 is closer, and in the time period from t2 to t3, the distance between the terminal device and the network device is getting closer and closer.

[0352] When the absolute value of the difference between the elevation angle value and 90 degrees is smaller, the connection state same-frequency and / or different-frequency measurement threshold can be set lower, thereby preventing the terminal device from triggering the connection state same-frequency and / or different-frequency measurement too early, which is beneficial to energy saving of the terminal device. When the absolute value of the difference between the elevation angle value and 90 degrees is larger, the connection state same-frequency and / or different-frequency measurement threshold can be set higher, thereby preventing the terminal device from triggering the connection state same-frequency and / or different-frequency measurement too late, thereby improving the reliability of the communication system.

[0353] When the elevation angle value gradually approaches 90 degrees, that is, the absolute value of the difference between the elevation angle value and 90 degrees gradually becomes smaller, the connection state same-frequency and / or different-frequency measurement threshold can be set lower, thereby preventing the terminal device from triggering the connection state same-frequency and / or different-frequency measurement too early, which is beneficial to energy saving of the terminal device. When the elevation angle value gradually moves away from 90 degrees, that is, the absolute value of the difference between the elevation angle value and 90 degrees gradually becomes larger, the connection state same-frequency and / or different-frequency measurement threshold can be set higher, thereby preventing the terminal device from triggering the connection state same-frequency and / or different-frequency measurement too late, thereby improving the reliability of the communication system.

[0354] Step 503: The terminal device determines whether to trigger the connected state same-frequency and / or different-frequency measurement according to the connected state same-frequency and / or different-frequency measurement threshold.

[0355] Specifically, the terminal device may trigger the connected state same-frequency and / or different-frequency measurement when the channel state of the terminal device is lower than the connected state same-frequency and / or different-frequency measurement threshold.

[0356] In one possible design, the terminal determines whether to trigger the connected state same-frequency measurement based on the channel status and the connected state same-frequency threshold.

[0357] Specifically, the terminal device may measure the channel state of the terminal device in the serving cell, and when the channel state is less than the connected state intra-frequency measurement threshold, the connected state intra-frequency measurement is triggered.

[0358] Optionally, the terminal device triggers connected state same-frequency measurement when the terminal device is located at the edge of the service cell.

[0359] Optionally, when the distance between the network device and the center of the serving cell is minimum, the terminal device determines whether to trigger connected state same-frequency and / or different-frequency measurement based on the channel state and the connected state same-frequency measurement threshold.

[0360] In another possible design, the terminal device determines whether to trigger the connection state same-frequency and / or different-frequency measurement based on the channel status and the connection state same-frequency and / or different-frequency measurement threshold, and reports the determination result to the network device.

[0361] Specifically, the terminal device can trigger the connection state same frequency and / or different frequency measurement when the channel state is less than or equal to the connection state same frequency and / or different frequency measurement threshold, and report the triggered connection state same frequency and / or different frequency measurement to the network device in the form of an event.

[0362] For example, taking the example of the terminal device reporting to the network device whether the connection state heterofrequency measurement is triggered, the terminal device can report to the network device whether the terminal device triggers the connection state heterofrequency measurement through the A1 event and the A2 event; wherein, referring to the above Table 2, the A1 event is used to stop the connection state heterofrequency and heterosystem measurement, and is triggered when the channel status is higher than the connection state heterofrequency measurement threshold; the A2 event is used to start the connection state heterofrequency and heterosystem measurement, and is triggered when the channel status is lower than the connection state heterofrequency measurement threshold.

[0363] Based on the above Figure 5 With the method shown, a terminal device can dynamically determine the connection state co-frequency and / or inter-frequency measurement threshold based on the network device's location information, improving the flexibility of determining the connection state co-frequency and / or inter-frequency measurement threshold. By appropriately adopting different thresholds in different network device location scenarios, the terminal device can avoid triggering the connection state co-frequency and / or inter-frequency measurement too early or too late, thereby improving the reliability of the communication system and also facilitating energy conservation of the terminal device.

[0364] above Figure 5 In the method shown, the terminal device can determine whether to trigger connected state same-frequency and / or inter-frequency measurement based on the channel state of the terminal device and the connected state same-frequency and / or inter-frequency measurement threshold based on the above step 503. The terminal device can also determine whether to trigger connected state same-frequency and / or inter-frequency measurement based on the indication information sent by the network device based on the position of the terminal device in the serving cell based on the following step 504.

[0365] Step 504: The terminal device determines whether to trigger connected state same-frequency and / or different-frequency measurements according to the indication information sent by the network device based on the position of the terminal device in the serving cell.

[0366] Specifically, the network device may send indication information for triggering connected state same-frequency and / or different-frequency measurements to the terminal device when the terminal device is located at the edge of the serving cell.

[0367] Exemplarily, the terminal device may send first information to the network device and receive indication information sent by the network device, and determine whether to trigger connected state same-frequency and / or different-frequency measurements according to the indication information.

[0368] The first information is used to indicate the location of the terminal device in the service cell, and the indication information is used to indicate whether to trigger the connected state same-frequency and / or different-frequency measurement.

[0369] Optionally, the terminal device carries its own location information in the first information and sends it to the network device. The network device determines whether the terminal device is located at the edge of the serving cell based on the location information of the terminal device, the location information of the center of the serving cell, and the coverage radius of the serving cell. When it is determined that the terminal device is at the edge of the serving cell, indication information is sent to the terminal device to instruct the terminal device to trigger connected state same-frequency and / or different-frequency measurements.

[0370] Specifically, the specific process of the network device determining whether the terminal device is located at the edge of the serving cell can refer to the specific process of the terminal device determining whether the terminal device is located at the edge of the serving cell in the above step 304, which will not be repeated.

[0371] Optionally, the terminal device carries the location of the terminal device in the service cell in the first information and sends it to the network device. When the first information is used to indicate that the terminal device is located at the edge of the service cell, the network device sends an indication information to the terminal device to instruct the terminal device to trigger the same-frequency and / or different-frequency measurement in the connected state.

[0372] Specifically, the specific process of the terminal device determining the position of the terminal device in the serving cell can refer to the above step 304 and will not be described in detail.

[0373] It should be noted that when the terminal device sends the first information to the network device, it can be in the form of reporting an event.

[0374] For example, taking the example of a terminal device reporting the location of the terminal device in the serving cell to the network device, the reporting event may include one or more of the following events:

[0375] Event 1: used to indicate that the distance between the terminal device and the center of the serving cell is less than a preset threshold. The network device can determine that the terminal device is located at the center of the serving cell based on Event 1.

[0376] Event 2: used to indicate that the distance between the terminal device and the center of the serving cell is greater than a preset threshold. The network device can determine that the terminal device is located at the edge of the serving cell based on Event 2.

[0377] Event 3: indicates that the absolute value of the difference between the distance between the terminal device and the center of the serving cell and a preset threshold is greater than a preset offset value. Based on Event 3, the network device can determine that the terminal device has moved away from the cell center.

[0378] It should be noted that the reporting event can also be other events used to indicate the location of the terminal device in the service cell, without limitation.

[0379] Based on the above step 504, the terminal device can trigger the connection state co-frequency and / or heterofrequency measurement when the terminal device is located at the edge of the service cell, so as to avoid unnecessary power consumption caused by the inability to find a suitable neighboring cell when the terminal device starts the connection state co-frequency and / or heterofrequency measurement in the center of the service cell, thereby facilitating energy saving of the terminal device. At the same time, it can also save the number of times the terminal device triggers the connection state co-frequency and / or heterofrequency measurement, improve the flexibility of the connection state co-frequency and / or heterofrequency measurement, and improve the efficiency of the connection state co-frequency and / or heterofrequency measurement.

[0380] It should be noted that the terminal device can determine whether to trigger the connected state same-frequency and / or different-frequency measurement based on one or more of the above steps 503 and 504, without limitation.

[0381] When the terminal device determines whether to trigger connected state same-frequency and / or different-frequency measurements based on the above steps 503 and 504, there is no restriction on the execution order between steps 503 and 504. Step 503 can be executed first, and then step 504, or step 504 can be executed first, and then step 503, or these two steps can be executed at the same time without restriction.

[0382] Based on the above Figure 5 The method shown, such as Figure 5a As shown, the above steps 501 and 502 can also be replaced by the following steps 501a and 502a, that is, the terminal device can determine the connection state same-frequency and / or different-frequency measurement threshold based on the channel status of the terminal device in the service cell based on the following steps 501a and 502a.

[0383] Figure 5a A flow chart of a method for obtaining transmission parameters provided in an embodiment of the present application is shown as follows: Figure 5a As shown, when the terminal device is in a connected state, the method may include:

[0384] Step 501a: The terminal device measures the channel state of the terminal device in the serving cell.

[0385] Specifically, the description of step 501a can refer to the specific description of step 301a above, and will not be repeated here.

[0386] Step 502a: The terminal device determines a connected state same-frequency and / or different-frequency measurement threshold according to the channel status.

[0387] Specifically, the terminal device may determine the connected state same-frequency and / or different-frequency measurement threshold according to the amount of change in the channel state within a unit time.

[0388] Exemplarily, when the change in the channel state per unit time is greater than or equal to the fifth threshold, the terminal device may use the ninth threshold as the connection state same-frequency and / or different-frequency measurement threshold; or, when the change in the channel state per unit time is less than the fifth threshold, the terminal device may use the tenth threshold as the connection state same-frequency and / or different-frequency measurement threshold; wherein the ninth threshold is less than the tenth threshold.

[0389] The description of the unit time and the description of the change amount of the channel state within the unit time can refer to the description of the unit time and the change amount of the channel state within the unit time in the above step 302a, and will not be repeated here.

[0390] Specifically, the terminal device may determine the amount of change in the channel state per unit time based on the channel state measured by the terminal device in step 501a.

[0391] Specifically, the terminal device can determine whether the channel state of the terminal device is getting better or worse based on the change in the channel state per unit time and the fifth threshold. When the change in the channel state per unit time is greater than or equal to the fifth threshold, it can be determined that the channel state of the terminal device is getting better; when the change in the channel state per unit time is less than the fifth threshold, it can be determined that the channel state of the terminal device is getting worse. Among them, the channel state of the terminal device is getting better and better can also be understood as the distance between the terminal device and the network device is getting closer and closer, and the channel state of the terminal device is getting worse and worse can also be understood as the distance between the terminal device and the network device is getting farther and farther, without restriction. The fifth threshold can be 0.

[0392] For example, taking the fifth threshold as 0 and using RSRP to characterize the channel state of the terminal device, assuming that the terminal device determines that the RSRP is 10dBm at time t1 and determines that the RSRP is 8dBm at time t2, the terminal device can use (8dBm-10dBm)=-2dBm as the change in the channel state within the unit time (t2-t1). Since -2dBm is less than 0, it can be determined that the channel state is getting worse during the time period from t1 to t2.

[0393] For another example, taking the fifth threshold as 0 and using RSRP to characterize the channel state of the terminal device, assuming that the terminal device determines that the RSRP is 8dBm at time t2 and determines that the RSRP is 15dBm at time t3, the terminal device can use (15dBm-8dBm)=7dBm as the change in the channel state within the unit time (t3-t2). Since 7dBm is greater than 0, it can be determined that the channel state is getting better and better in the time period from t2 to t3.

[0394] Optionally, the fifth threshold is greater than 0. When the fifth threshold is greater than 0, if the change in the channel state per unit time is greater than the fifth threshold, it can be determined that the channel state is getting better.

[0395] For example, taking the fifth threshold as 2dBm and using RSRP to characterize the channel state of the terminal device, assuming that the terminal device determines that the RSRP is 7dBm at time t1 and determines that the RSRP is 13dBm at time t2, the terminal device can use (13dBm-7dBm)=6dBm as the change in the channel state within the unit time (t2-t1). Since 6dBm is greater than 2dBm, it can be determined that the channel state is getting better and better during the time period from t1 to t2.

[0396] Optionally, the fifth threshold is less than 0. When the fifth threshold is less than 0, if the change in the channel state per unit time is less than or equal to the fifth threshold, it can be determined that the channel state is getting worse.

[0397] For example, taking the fifth threshold as -2dBm and using RSRP to characterize the channel state of the terminal device as an example, assuming that the terminal device determines that the RSRP is 7dBm at time t1 and determines that the RSRP is 4dBm at time t2, the terminal device can use (4dBm-7dBm)=-3dBm as the change in the channel state within the unit time (t2-t1). Since -3dBm is less than -2dBm, it can be determined that the channel state is getting worse in the time period from t1 to t2.

[0398] It should be noted that, when the unit time is constant, the larger the absolute value of the change in the channel state within the unit time, the faster the channel state changes.

[0399] Specifically, the manner in which the terminal device determines the ninth threshold and the tenth threshold may refer to the manner in which the terminal device determines the first threshold and the second threshold in step 302, and details thereof will not be repeated.

[0400] Based on the above Figure 5a According to the method shown, when the channel state of the terminal device is getting better and better, the terminal device can adopt the ninth threshold with a lower threshold as the connection state same-frequency and / or different-frequency measurement threshold to avoid the terminal device triggering the connection state same-frequency and / or different-frequency measurement too early, which is beneficial to energy saving of the terminal device; when the channel state of the terminal device is getting worse and worse, the tenth threshold with a higher threshold is adopted as the connection state same-frequency and / or different-frequency measurement threshold to avoid the terminal device triggering the connection state same-frequency and / or different-frequency measurement too late, thereby improving the reliability of the communication system.

[0401] Based on the above Figures 3 to 5According to the method shown, the terminal device can periodically update the cell reselection co-frequency and / or hetero-frequency measurement threshold, the wireless link failure threshold or the connected state co-frequency and / or hetero-frequency measurement threshold after determining the cell reselection co-frequency and / or hetero-frequency measurement threshold, the wireless link failure threshold or the connected state co-frequency and / or hetero-frequency measurement threshold, so as to improve the accuracy of the cell reselection co-frequency and / or hetero-frequency measurement threshold, the wireless link failure threshold or the connected state co-frequency and / or hetero-frequency measurement threshold, thereby improving the accuracy of the cell reselection, wireless link failure response process or cell switching, and improving the reliability of the communication system.

[0402] Exemplarily, the terminal device may use a timer to periodically update the cell reselection same-frequency and / or different-frequency measurement threshold, the radio link failure threshold, or the connected state same-frequency and / or different-frequency measurement threshold.

[0403] Specifically, the terminal device can set a first timer for the cell reselection same-frequency and / or different-frequency measurement threshold. After the first timer times out, refer to the above Figure 3 The terminal device may also set a second timer for the radio link failure threshold. After the second timer times out, refer to the above Figure 4 The terminal device may also set a third timer for the connection state same frequency and / or different frequency measurement threshold, and after the third timer times out, refer to the above Figure 5 The connected state same-frequency and / or different-frequency measurement thresholds are re-determined in the manner of determining the connected state same-frequency and / or different-frequency measurement thresholds in the embodiment of the present invention.

[0404] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between devices. It is understandable that, in order to realize the above functions, each device includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0405] The embodiments of the present application can divide the functional modules of each device according to the above method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods.

[0406] In the case of dividing each functional module into corresponding functional modules, Figure 6 A terminal device 60 is shown. The terminal device 60 may include a transceiver module 601 and a processing module 602. Exemplarily, the terminal device 60 may be a terminal device, or may be a chip used in a terminal device, or other combined device or component having the aforementioned terminal device functions. When the terminal device 60 is a terminal device, the transceiver module 601 may be a transceiver, which may include an antenna and a radio frequency circuit, etc., and the processing module 602 may be a processor (or processing circuit), such as a baseband processor, which may include one or more CPUs. When the terminal device 60 is a component having the aforementioned terminal device functions, the transceiver module 601 may be a radio frequency unit, and the processing module 602 may be a processor (or processing circuit), such as a baseband processor. When the terminal device 60 is a system-on-chip (SoC), the transceiver module 601 may be the input / output interface of the chip (e.g., a baseband chip), and the processing module 602 may be the processor (or processing circuit) of the SoC, which may include one or more central processing units. It should be understood that the transceiver module 601 in the embodiment of the present application can be implemented by a transceiver or a transceiver-related circuit component, and the processing module 602 can be implemented by a processor or a processor-related circuit component (or, referred to as a processing circuit).

[0407] For example, the transceiver module 601 can be used to perform Figure 3-Figure 5 All transceiver operations performed by the terminal device in the embodiment shown, and / or other processes used to support the technology described herein. The processing module 602 can be used to perform Figure 3-Figure 5 All operations except the sending and receiving operations performed by the terminal device in the illustrated embodiment, and / or other processes for supporting the technology described herein.

[0408] Specifically, the transceiver module 601 is used to obtain transmission parameters of the network device, where the transmission parameters are used to indicate location information of the network device.

[0409] The processing module 602 is configured to determine a cell reselection intra-frequency and / or inter-frequency measurement threshold based on the transmission parameters; or

[0410] The processing module 602 is configured to determine a radio link failure threshold based on the transmission parameters; or

[0411] The processing module 602 is configured to determine a connected state same-frequency and / or different-frequency measurement threshold according to the transmission parameters.

[0412] In one possible design, the transmission parameters include the distance between the terminal device and the network device, and the processing module 602 is specifically used to: if the change in distance per unit time is less than or equal to a first threshold, the processing module 602 uses the first threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold; or, if the change in distance per unit time is greater than the first threshold, the processing module 602 uses the second threshold as the cell reselection co-frequency and / or inter-frequency measurement threshold; wherein the first threshold is less than the second threshold.

[0413] In one possible design, the transmission parameters include the elevation angle of the network device relative to the center of the service cell corresponding to the terminal device, and the processing module 602 is specifically used to: determine the cell reselection co-frequency and / or inter-frequency measurement threshold corresponding to the elevation angle from the mapping relationship between the elevation angle and the cell reselection co-frequency and / or inter-frequency measurement threshold.

[0414] In one possible design, the transmission parameters include the distance between the terminal device and the network device, and the processing module 602 is specifically used to: if the change in distance per unit time is less than or equal to the second threshold, the processing module 602 uses the third threshold as the wireless link failure threshold; or, if the change in distance per unit time is greater than the second threshold, the processing module 602 uses the fourth threshold as the wireless link failure threshold; wherein the third threshold is greater than the fourth threshold.

[0415] In one possible design, when the transmission parameters include the elevation angle of the network device relative to the center of the service cell corresponding to the terminal device, the processing module 602 is specifically used to: determine the connection state same-frequency and / or different-frequency measurement threshold corresponding to the elevation angle from the mapping relationship between the elevation angle and the connection state same-frequency and / or different-frequency measurement threshold according to the elevation angle.

[0416] In one possible design, the processing module 602 is also used to periodically update the cell reselection same-frequency and / or different-frequency measurement threshold, the wireless link failure threshold or the connected state same-frequency and / or different-frequency measurement threshold.

[0417] In one possible design, the processing module 602 is further used to perform cell reselection same-frequency and / or different-frequency measurements when it is determined that the terminal device is located at the edge of the service cell; or, to perform connected state same-frequency measurements.

[0418] In one possible design, the processing module 602 is also used to perform cell reselection co-frequency and / or inter-frequency measurements based on the cell reselection co-frequency and / or inter-frequency measurement threshold when it is determined that the distance between the network device and the center of the service cell is the shortest.

[0419] In one possible design, the processing module 602 is also used to determine whether to trigger connection-state co-frequency and / or hetero-frequency measurements based on the indication information sent by the network device based on the position of the terminal device in the service cell. When the indication information is used to indicate the triggering of connection-state co-frequency and / or hetero-frequency measurements, connection-state co-frequency and / or hetero-frequency measurements are performed according to the connection-state co-frequency and / or hetero-frequency measurement threshold.

[0420] As another possible implementation method, Figure 6 The processing module 602 in the terminal device 60 may also be used to:

[0421] The processing module 602 is also used to obtain the channel state measured by the terminal device in the corresponding service cell; the processing module 602 is also used to determine the cell reselection same-frequency and / or different-frequency measurement threshold based on the channel state; or, the processing module 602 is also used to determine the wireless link failure threshold based on the channel state; or, the processing module 602 is also used to determine the connection state same-frequency and / or different-frequency measurement threshold based on the channel state.

[0422] In one possible design, the processing module 602 is specifically used to: if the change in the channel state per unit time is greater than or equal to the third threshold, the processing module 602 uses the fifth threshold as the cell reselection same / different frequency measurement threshold; or, if the change in the channel state per unit time is less than the third threshold, the processing module 602 uses the sixth threshold as the cell reselection same / different frequency measurement threshold; wherein the fifth threshold is less than the sixth threshold.

[0423] In one possible design, the processing module 602 is specifically used to: if the change in the channel state per unit time is greater than or equal to the fourth threshold, the processing module 602 uses the seventh threshold as the wireless link failure threshold; or, if the change in the channel state per unit time is less than the fourth threshold, the processing module 602 uses the eighth threshold as the wireless link failure threshold; wherein the seventh threshold is greater than the eighth threshold.

[0424] In one possible design, the processing module 602 is specifically used to: if the change in the channel state per unit time is greater than or equal to the fifth threshold, the processing module uses the ninth threshold as the connection state same-frequency and / or different-frequency measurement threshold; or, if the change in the channel state per unit time is less than the fifth threshold, the processing module uses the tenth threshold as the connection state same-frequency and / or different-frequency measurement threshold; wherein the ninth threshold is less than the tenth threshold.

[0425] As another possible implementation method, Figure 6The transceiver module 601 in the embodiment can be replaced by a transceiver, which can integrate the functions of the transceiver module 601; the processing module 602 can be replaced by a processor, which can integrate the functions of the processing module 602. Figure 6 The terminal device 60 shown may also include a memory. When the transceiver module 601 is replaced by a transceiver and the processing module 602 is replaced by a processor, the terminal device 60 involved in the embodiment of the present application may be Figure 2 The communication device shown.

[0426] In the case of dividing each functional module into corresponding functional modules, Figure 7 A network device 70 is shown. The network device 70 may include a transceiver module 701 and a processing module 702. Exemplarily, the network device 70 may be a network device, or a chip used in a network device, or other combined device or component having the aforementioned network device functions. When the network device 70 is a network device, the transceiver module 701 may be a transceiver, which may include an antenna and a radio frequency circuit, etc., and the processing module 702 may be a processor (or processing circuit), such as a baseband processor, which may include one or more CPUs. When the network device 70 is a component having the aforementioned network device functions, the transceiver module 701 may be a radio frequency unit, and the processing module 702 may be a processor (or processing circuit), such as a baseband processor. When the network device 70 is a system-on-chip (SoC), the transceiver module 701 may be the input / output interface of the chip (e.g., a baseband chip), and the processing module 702 may be the system-on-chip's processor (or processing circuit), which may include one or more central processing units. It should be understood that the transceiver module 701 in the embodiment of the present application can be implemented by a transceiver or a transceiver-related circuit component, and the processing module 702 can be implemented by a processor or a processor-related circuit component (or, referred to as a processing circuit).

[0427] For example, the transceiver module 701 can be used to perform Figure 3-Figure 5 All transceiver operations performed by the network device in the embodiment shown, and / or other processes used to support the technology described herein. The processing module 710 can be used to perform Figure 3-Figure 5 All operations except for the transceiver operations performed by the network devices in the illustrated embodiment, and / or other processes for supporting the technology described herein.

[0428] Specifically, the transceiver module 701 is used to send transmission parameters for indicating the location information of the network device to the terminal device; so that the terminal device determines the cell reselection same-frequency and / or different-frequency measurement threshold based on the transmission parameters; or, determines the wireless link failure threshold based on the transmission parameters; or, determines the connection state same-frequency and / or different-frequency measurement threshold based on the transmission parameters.

[0429] In one possible design, the transmission parameters include the distance between the terminal device and the network device, so that when the change in the distance of the terminal device per unit time is less than or equal to a first threshold, the first threshold is used as the cell reselection co-frequency and / or inter-frequency measurement threshold; or, when the change in the distance per unit time is greater than the first threshold, the second threshold is used as the cell reselection co-frequency and / or inter-frequency measurement threshold; wherein the first threshold is less than the second threshold.

[0430] In one possible design, the transmission parameters include the elevation angle of the network device relative to the center of the service cell corresponding to the terminal device, so that the terminal device determines the cell reselection co-frequency and / or inter-frequency measurement threshold corresponding to the elevation angle from the mapping relationship between the elevation angle and the cell reselection co-frequency and / or inter-frequency measurement threshold.

[0431] In one possible design, the transmission parameters include the distance between the terminal device and the network device, so that when the change in the distance of the terminal device per unit time is less than or equal to the second threshold, the third threshold is used as the wireless link failure threshold; or, when the change in the distance per unit time is greater than the second threshold, the fourth threshold is used as the wireless link failure threshold; wherein the third threshold is greater than the fourth threshold.

[0432] In one possible design, the transmission parameters include the elevation angle of the network device relative to the center of the service cell corresponding to the terminal device, so that the terminal device determines the connection state same-frequency and / or different-frequency measurement threshold corresponding to the elevation angle from the mapping relationship between the elevation angle and the connection state same-frequency and / or different-frequency measurement threshold.

[0433] In one possible design, the processing module 702 is used to determine the position of the terminal device in the service cell; the transceiver module 701 is also used to send indication information to the terminal device according to the position of the terminal device in the service cell, so that the terminal device determines whether to trigger the connection state co-frequency and / or heterofrequency measurement according to the indication information, wherein, when the indication information is used to indicate the triggering of the connection state co-frequency and / or heterofrequency measurement, the terminal device performs the connection state co-frequency and / or heterofrequency measurement according to the connection state co-frequency and / or heterofrequency measurement threshold.

[0434] As another possible implementation method, Figure 7 The transceiver module 701 in the embodiment can be replaced by a transceiver, which can integrate the functions of the transceiver module 701; the processing module 702 can be replaced by a processor, which can integrate the functions of the processing module 702. Figure 7 The network device 70 shown may also include a memory. When the transceiver module 701 is replaced by a transceiver and the processing module 702 is replaced by a processor, the network device 70 involved in the embodiment of the present application may be Figure 2 The communication device shown.

[0435] The embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the above-mentioned method embodiments can be completed by a computer program to instruct the relevant hardware, and the program can be stored in the above-mentioned computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned method embodiments. The computer-readable storage medium can be an internal storage unit of the terminal (including the data sending end and / or the data receiving end) of any of the above-mentioned embodiments, such as the hard disk or memory of the terminal. The above-mentioned computer-readable storage medium can also be an external storage device of the above-mentioned terminal, such as a plug-in hard disk equipped on the above-mentioned terminal, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc. Further, the above-mentioned computer-readable storage medium can also include both the internal storage unit of the above-mentioned terminal and an external storage device. The above-mentioned computer-readable storage medium is used to store the above-mentioned computer program and other programs and data required by the above-mentioned terminal. The above-mentioned computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0436] It should be noted that the terms "first" and "second" in the specification, claims, and drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products, or devices.

[0437] It should be understood that in the present application, "at least one (item)" refers to one or more, "more than one" refers to two or more, "at least two (items)" refers to two or three and more than three, and "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0438] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0439] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0440] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0441] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0442] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0443] The above is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for obtaining transmission parameters, characterized in that: include: The terminal device obtains a transmission parameter of the network device, where the transmission parameter is used to indicate location information of the network device; The terminal device determines a cell reselection intra-frequency and / or inter-frequency measurement threshold according to the transmission parameter; or The terminal device determines a wireless link failure threshold according to the transmission parameter; or The terminal device determines, according to the transmission parameters, a connection state same-frequency and / or different-frequency measurement threshold; The transmission parameter includes the distance between the terminal device and the network device; The terminal device determines, according to the transmission parameter, the cell reselection intra-frequency and / or inter-frequency measurement threshold, including: The change in the distance per unit time is less than or equal to a first threshold, and the terminal device uses the first threshold as the cell reselection intra-frequency and / or inter-frequency measurement threshold; or If the change in the distance within the unit time is greater than the first threshold, the terminal device uses the second threshold as the intra-frequency and / or inter-frequency measurement threshold for cell reselection; wherein the first threshold is less than the second threshold; The transmission parameter includes a distance between the terminal device and the network device, and the terminal device determines the wireless link failure threshold according to the transmission parameter, including: The change in the distance per unit time is less than or equal to the second threshold, and the terminal device uses the third threshold as the radio link failure threshold; or The change in the distance within the unit time is greater than the second threshold, and the terminal device uses the fourth threshold as the wireless link failure threshold; wherein the third threshold is greater than the fourth threshold.

2. The method according to claim 1, characterized in that The transmission parameter includes an elevation angle of the network device relative to a center of a serving cell corresponding to the terminal device, and the terminal device determines, based on the transmission parameter, a same-frequency and / or different-frequency measurement threshold for cell reselection, including: The terminal device determines the cell reselection same-frequency and / or different-frequency measurement threshold corresponding to the elevation angle from a mapping relationship between the elevation angle and the cell reselection same-frequency and / or different-frequency measurement threshold according to the elevation angle.

3. The method according to claim 1 or 2, characterized in that When the transmission parameter includes an elevation angle of the network device relative to a center of a serving cell corresponding to the terminal device, the terminal device determines the connected state same-frequency and / or inter-frequency measurement threshold according to the transmission parameter, including: The terminal device determines the connection state same-frequency and / or different-frequency measurement threshold corresponding to the elevation angle from a mapping relationship between the elevation angle and the connection state same-frequency and / or different-frequency measurement threshold according to the elevation angle.

4. The method according to claim 1 or 2, characterized in that The method further comprises: The terminal device periodically updates the cell reselection same-frequency and / or different-frequency measurement threshold, the radio link failure threshold or the connected state same-frequency and / or different-frequency measurement threshold.

5. A terminal device, characterized in that: include: A receiving module, configured to obtain a transmission parameter of a network device, wherein the transmission parameter is used to indicate location information of the network device; a processing module, configured to determine a cell reselection intra-frequency and / or inter-frequency measurement threshold based on the transmission parameters; or The processing module is configured to determine a radio link failure threshold based on the transmission parameter; or The processing module is configured to determine a connected state same-frequency and / or different-frequency measurement threshold according to the transmission parameters; The transmission parameter includes the distance between the terminal device and the network device, and the processing module is specifically configured to: The change in the distance per unit time is less than or equal to a first threshold, and the processing module uses the first threshold as the cell reselection intra-frequency and / or inter-frequency measurement threshold; or If the change in the distance within the unit time is greater than the first threshold, the processing module uses the second threshold as the intra-frequency and / or inter-frequency measurement threshold for cell reselection; wherein the first threshold is less than the second threshold; The transmission parameter includes a distance between the terminal device and the network device, and the processing module is further specifically configured to: The change in the distance per unit time is less than or equal to the second threshold, and the processing module uses the third threshold as the radio link failure threshold; or If the change in the distance within the unit time is greater than the second threshold, the processing module uses the fourth threshold as the wireless link failure threshold; wherein the third threshold is greater than the fourth threshold.

6. The terminal device according to claim 5, characterized in that The transmission parameter includes an elevation angle of the network device relative to a center of a serving cell corresponding to the terminal device, and the processing module is specifically configured to: According to the elevation angle, the cell reselection intra-frequency and / or inter-frequency measurement threshold corresponding to the elevation angle is determined from a mapping relationship between the elevation angle and the cell reselection intra-frequency and / or inter-frequency measurement threshold.

7. The terminal device according to claim 5 or 6, characterized in that: When the transmission parameter includes an elevation angle of the network device relative to a center of a serving cell corresponding to the terminal device, the processing module is specifically configured to: According to the elevation angle, the connection state same-frequency and / or different-frequency measurement threshold corresponding to the elevation angle is determined from a mapping relationship between the elevation angle and the connection state same-frequency and / or different-frequency measurement threshold.

8. The terminal device according to claim 5 or 6, characterized in that: The processing module is further configured to: The cell reselection intra-frequency and / or inter-frequency measurement threshold, the radio link failure threshold, or the connected state intra-frequency and / or inter-frequency measurement threshold is periodically updated.

9. A terminal device, characterized in that: The terminal device includes one or more processors and a transceiver; the one or more processors and the transceiver support the terminal device to execute the method for obtaining transmission parameters as described in any one of claims 1-4.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions or programs. When the computer instructions or programs are executed on a computer, the computer is caused to execute the method for obtaining transmission parameters according to any one of claims 1 to 4.

11. A chip, characterized in that: The method comprises a processor and a communication interface, wherein the processor is used to read instructions to execute the method for obtaining transmission parameters according to any one of claims 1 to 4.

12. A communication system, characterized in that: The system includes terminal equipment and network equipment; The terminal device is configured to obtain a transmission parameter of a network device, the transmission parameter being used to indicate location information of the network device; and is further configured to determine a cell reselection intra-frequency and / or inter-frequency measurement threshold based on the transmission parameter; or, the terminal device is configured to determine a radio link failure threshold based on the transmission parameter; or, the terminal device is configured to determine a connected state intra-frequency and / or inter-frequency measurement threshold based on the transmission parameter; The transmission parameter includes the distance between the terminal device and the network device; The terminal device determines, according to the transmission parameter, the cell reselection intra-frequency and / or inter-frequency measurement threshold, including: The change in the distance per unit time is less than or equal to a first threshold, and the terminal device uses the first threshold as the cell reselection intra-frequency and / or inter-frequency measurement threshold; or If the change in the distance within the unit time is greater than the first threshold, the terminal device uses the second threshold as the intra-frequency and / or inter-frequency measurement threshold for cell reselection; wherein the first threshold is less than the second threshold; The transmission parameter includes a distance between the terminal device and the network device, and the terminal device determines the wireless link failure threshold according to the transmission parameter, including: The change in the distance per unit time is less than or equal to the second threshold, and the terminal device uses the third threshold as the radio link failure threshold; or If the change in the distance per unit time is greater than the second threshold, the terminal device uses the fourth threshold as the radio link failure threshold; wherein the third threshold is greater than the fourth threshold; The network device is used to send the transmission parameters to the terminal device.

Images