Paging method and communication device

Abstract

The present application provides a paging method and communication device, the method comprising: a terminal device determining a first paging detection opportunity resource based on a first location area in which the terminal device is currently located and a first correspondence, wherein multiple location areas in the first correspondence correspond to multiple paging detection opportunity resources, and the first location area corresponds to the first paging detection opportunity resource in the first correspondence. The terminal device detects downlink control information from a network device on the first paging detection opportunity resource, and the downlink control information is used to schedule paging messages. This can reduce power consumption of the communication device.

Description

Technical Field

[0001] The present application relates to the field of communications, and more particularly, to a paging method and a communication device. Background Art

[0002] In a mobile communication system, when a network device needs to send downlink data and / or update system information to a terminal device in an idle state, the network device can page the terminal device. The network device can send downlink control information (DCI) for scheduling paging messages on each paging monitoring occasion (PMO) resource in a paging frame (PF) within a paging cycle, so that the DCI sent through different beams on each PMO resource can cover the service range of the network device. The terminal device detects the DCI on each PMO resource in turn to obtain a paging message based on the detected DCI.

[0003] However, for network devices with a large coverage area and a large number of service beams, such as network devices that require hundreds of service beams to cover the coverage area that meets the access conditions, it is necessary to send a DCI for scheduling paging messages of a terminal device on hundreds of PMO resources. Accordingly, the terminal device needs to detect whether the DCI exists on hundreds of PMO resources, and the resource overhead and power consumption are too large. Summary of the Invention

[0004] The embodiments of the present application provide a paging method and a communication device, which can reduce the power consumption of a communication device.

[0005] In a first aspect, a paging method is provided, which can be executed by a terminal device or a module (such as a chip) configured in (or used for) the terminal device. The following description takes the terminal device executing the paging method as an example.

[0006] The method includes: a terminal device determining a first paging detection opportunity resource based on a first location area of ​​a current location of the terminal device and a first correspondence, wherein multiple location areas in the first correspondence correspond to multiple paging detection opportunity resources, and the first location area corresponds to the first paging detection opportunity resource in the first correspondence. The terminal device detects downlink control information from a network device on the first paging detection opportunity resource, wherein the downlink control information is used to schedule a paging message.

[0007] According to the above solution, the terminal device can determine a first PMO resource for the terminal device to detect DCI for scheduling paging messages (hereinafter referred to as paging DCI) based on the location area of ​​the terminal device's current location. The terminal device detects the DCI on the first PMO resource. Compared to the terminal device detecting the paging DCI on each PMO resource, the power consumption of the terminal device can be reduced.

[0008] In combination with the first aspect, in some implementations of the first aspect, the method further includes: the terminal device receives first information from the network device, and the first information is used to indicate the first corresponding relationship.

[0009] According to the above solution, the network device can notify the terminal device of the first correspondence between the location area and the PMO resource through the first information, so that the terminal device can determine the PMO resource for detecting the paging DCI based on the location area and the first correspondence. This can reduce the power consumption of the terminal device and improve resource utilization.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the terminal device receives first information from the network device, including: the terminal device receives a first synchronization signal block, and the terminal device receives a system information block from the network device based on the first synchronization signal block, wherein the system information block includes the first information.

[0011] According to the above solution, the first correspondence relationship can be carried in the system information block, so that the terminal device can obtain the first correspondence relationship based on the system information block broadcast by the network device without establishing a radio resource control (RRC) connection with the network device.

[0012] In conjunction with the first aspect, in certain implementations of the first aspect, the method further includes: the terminal device moves from the first location area to a second location area. The terminal device determines, based on the second location area and the first correspondence, a second paging detection opportunity resource corresponding to the second location area; and the terminal device detects, in the second paging detection opportunity resource, downlink control information for scheduling a paging message.

[0013] According to the above scheme, the terminal device changes the PMO resources in time after the location area changes, reducing the unnecessary power consumption caused by the terminal device detecting the paging DCI on the PMO resources where the corresponding beam cannot cover the current location area, and improving the reliability of paging.

[0014] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: the terminal device sends second information to the network device, the second information being used to indicate the location to which the terminal device moves, or being used to indicate the second location area, wherein the location to which the terminal device moves belongs to the second location area.

[0015] According to the above solution, the terminal device can notify the network device of the location information of the terminal device through the second information, so that the network device can know the current location area of ​​the terminal device. The network device can send a paging DCI to the terminal device only on the PMO resource corresponding to the current location area of ​​the terminal device, which can further reduce the power consumption of the network device and improve resource utilization. However, the present application is not limited to this. The network device can also send a paging DCI for a terminal device on each PMO resource. The terminal device detects the paging DCI on at least the PMO resource corresponding to the location area. Compared with the terminal detecting the paging DCI on each PMO resource, the power consumption of the terminal device can be reduced.

[0016] In a second aspect, a paging method is provided, which can be executed by a network device or a module (such as a chip) configured in (or used for) the network device. The following description will be made using an example of a network device executing the paging method.

[0017] The method includes: a network device determining a first paging detection opportunity resource based on a first location area where a terminal device is currently located and a first correspondence, wherein multiple location areas in the first correspondence correspond to multiple paging detection opportunity resources, and the first location area corresponds to the first paging detection opportunity resource in the first correspondence. Furthermore, the network device sends downlink control information to the terminal device on the first paging detection opportunity resource, wherein the downlink control information is used to schedule a paging message.

[0018] According to the above scheme, the network device can send paging DCI to the terminal device on the PMO resources corresponding to the current location area of ​​the terminal device, which can reduce the power consumption of the network device and improve resource utilization compared to sending paging DCI to the terminal device on each PMO resource.

[0019] In combination with the second aspect, in some implementations of the second aspect, the method further includes: the network device sending first information to the terminal device, where the first information is used to indicate the first corresponding relationship.

[0020] According to the above solution, the network device can determine the PMO resources used by the terminal device to detect paging DCI based on the location area of ​​the terminal device and the first correspondence. The first correspondence between the location area and the PMO resource is notified to the terminal device through the first information, so that the terminal device can also determine the PMO resources used to detect paging DCI based on the location area of ​​the terminal device and the first correspondence. This enables the network device and the terminal device to have a consistent understanding of the PMO resources used by the terminal device to detect paging DCI.

[0021] In combination with the second aspect, in some implementations of the second aspect, the network device sends the first information to the terminal device, including: the network device sends a system information block to the terminal device, where the system information block includes the first information.

[0022] In conjunction with the second aspect, in certain implementations of the second aspect, the method further includes: the network device determining that the terminal device has moved from the first location area to a second location area. The network device determines, based on the second location area and the first correspondence, a second paging detection opportunity resource corresponding to the second location area; and detecting, in the second paging detection opportunity resource, downlink control information for scheduling a paging message.

[0023] In conjunction with the second aspect, in certain implementations of the second aspect, the network device determining that the terminal device has moved from the first location area to the second location area includes: the network device receiving second information from the terminal device, the second information being used to indicate a location to which the terminal device has moved, or being used to indicate the second location area, wherein the location to which the terminal device has moved belongs to the second location area; and the network device determining, based on the second information, that the terminal device has moved from the first location area to the second location area.

[0024] The beneficial effects of the above implementations can be found in the description of the beneficial effects of the implementation corresponding to the first aspect, and will not be repeated here for the sake of brevity. In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the multiple paging detection opportunity resources are paging detection opportunity resources in multiple resource groups, and the interval between two temporally adjacent resource groups is a first time interval, and the first time interval is configured by the network device.

[0025] According to the above solution, the first time interval is spaced between multiple resource groups, which can reduce the probability that other downlink information of the network device cannot be sent in a timely manner due to continuous PMO resources. In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the multiple resource groups include a first resource group and a second resource group that are adjacent in time, and the first time interval between the first resource group and the second resource group includes a synchronization signal block group, and the M synchronization signal blocks in the synchronization signal block group have a one-to-one correspondence with the M paging detection opportunity resources in the first resource group, or the M synchronization signal blocks in the synchronization signal block group have a one-to-one correspondence with the M paging detection opportunity resources in the second resource group.

[0026] According to the above solution, the network device can send the synchronization signal block group corresponding to a PMO resource group before or after the PMO resource group, so that the terminal device can perform downlink time and frequency synchronization calibration based on the synchronization signal block group used by the terminal device for time and frequency synchronization, and then detect the paging DCI on the corresponding PMO resource. This improves the reliability of paging terminal devices.

[0027] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the multiple paging opportunity resources are paging opportunity resources within a paging cycle, and the method also includes: the network device sends and receives third information from the network device to the terminal device, and the third information is used to indicate a first offset, and the first offset is the offset between the starting position of the paging cycle and the system frame with frame number 0, and the first offset is greater than the frame length of the system frame.

[0028] According to the above solution, the first offset is at least greater than the frame length of one system frame, allowing the network device to send the synchronization signal group corresponding to the first PMO resource group before the start of the paging cycle. This allows the terminal device to detect the paging DCI on the corresponding PMO resource after performing downlink time and frequency synchronization calibration based on the synchronization signal block. This improves the reliability of paging terminal devices.

[0029] In a third aspect, a paging method is provided, which can be executed by a terminal device or a module (such as a chip) configured in (or used for) the terminal device. The following description will be given using an example of a terminal device executing the paging method.

[0030] The method includes: a terminal device determining a first paging detection opportunity resource based on a first synchronization signal block and a second correspondence, wherein the first synchronization signal block is used for time and frequency synchronization between the terminal device and a network device, multiple synchronization signal blocks in the second correspondence correspond to multiple paging detection opportunity resources, and the first synchronization signal block corresponds to the first paging detection opportunity resource in the second correspondence. The terminal device detects downlink control information on the first paging detection opportunity resource, and the downlink control information is used to schedule a paging message.

[0031] According to the above solution, the terminal device can determine the PMO resource corresponding to the synchronization signal block used by the terminal device for time and frequency synchronization with the network device (i.e., the synchronization signal block serving the terminal device) based on the second correspondence between the synchronization signal block and the PMO resource, and detect the paging DCI on the PMO resource. Compared with the terminal device detecting the paging DCI on each PMO resource, the power consumption of the terminal device can be reduced.

[0032] In combination with the third aspect, in some implementations of the third aspect, the method further includes: the terminal device receives fourth information from the network device, and the fourth information is used to indicate the second corresponding relationship.

[0033] According to the above solution, the network device can notify the terminal device of the second correspondence between the synchronization signal block and the PMO resource through the fourth information, so that the terminal device can determine the PMO resource for detecting the paging DCI based on the synchronization signal block and the second correspondence. This reduces the power consumption of the terminal device and improves resource utilization.

[0034] In combination with the third aspect, in certain implementations of the third aspect, the terminal device receives the fourth information from the network device, including: the terminal device receives the first synchronization signal block, and the terminal device receives the system information block from the network device based on the first synchronization signal block, and the system information block includes the fourth information.

[0035] According to the above solution, the second corresponding relationship can be carried in the system information block, so that the terminal device can obtain the second corresponding relationship based on the system information block broadcast by the network device without establishing an RRC connection with the network device.

[0036] In conjunction with the third aspect, in certain implementations of the third aspect, the method further includes: the terminal device moves from a first location area to a second location area, the first location area being the location area corresponding to the first synchronization signal block. The terminal device determines, based on the second synchronization signal block corresponding to the second location area and the second correspondence, a second paging detection opportunity resource; and the terminal device detects, in the second paging detection opportunity resource, downlink control information for scheduling a paging message.

[0037] According to the above scheme, the terminal device changes the PMO resources in time after the location area changes, reducing the unnecessary power consumption caused by the terminal device detecting the paging DCI on the PMO resources where the corresponding beam cannot cover the current location area, and improving the reliability of paging.

[0038] In combination with the third aspect, in certain implementations of the third aspect, the method also includes: the terminal device receives the second synchronization signal block in the second location area, and determines that the second location area corresponds to the second synchronization signal block; or, the terminal device determines the second synchronization signal block corresponding to the second location area in the third correspondence based on a third correspondence, wherein the third correspondence is a correspondence between multiple synchronization signal blocks and multiple location areas.

[0039] In conjunction with the third aspect, in certain implementations of the third aspect, the method further includes: the terminal device sending fifth information to the network device, where the fifth information is used to indicate one or more of the following:

[0040] the second synchronization signal block, the location to which the terminal device moves, or the second location area,

[0041] The location to which the terminal device moves belongs to the second location area.

[0042] According to the above scheme, the terminal device can notify the network device of the location information or synchronization signal block of the terminal device through the fifth information, so that the network device can determine the PMO resource used by the current terminal device to detect the paging DCI, and send the paging DCI to the terminal device on the PMO resource, which can further reduce the power consumption of the network device and improve resource utilization.

[0043] In a fourth aspect, a paging method is provided, which can be executed by a network device or a module (such as a chip) configured in (or used for) a network device. The following description will be given using an example of a network device executing the paging method.

[0044] The method includes: a network device determining a first paging detection opportunity resource based on a first synchronization signal block and a second correspondence, wherein multiple synchronization signal blocks in the second correspondence correspond to multiple paging detection opportunity resources, and the first synchronization signal block corresponds to the first paging detection opportunity resource in the second correspondence. Furthermore, the network device sends downlink control information on the first paging detection opportunity resource to a terminal device, the downlink control information being used to schedule a paging message, and the terminal device is a terminal device that is time-frequency synchronized with the network device based on the first synchronization signal block.

[0045] According to the above scheme, the network device can determine the first PMO resource used by the terminal device to detect DCI based on the first synchronization signal block and the second correspondence of the serving terminal device. The network device sends a paging DCI to the terminal device on the first PMO resource, which can reduce the power consumption of the network device and improve resource utilization compared to sending a paging DCI to the terminal device on each PMO resource.

[0046] In combination with the fourth aspect, in some implementations of the fourth aspect, the method further includes: the network device sends fourth information to the terminal device, where the fourth information is used to indicate the second corresponding relationship.

[0047] In combination with the fourth aspect, in certain implementations of the fourth aspect, the network device sends the fourth information to the terminal device, including: the network device sends a system message block to the terminal device, where the system information block includes the fourth information.

[0048] In conjunction with the fourth aspect, in certain implementations of the fourth aspect, the method further includes: determining, by the network device, a second paging detection opportunity based on the second synchronization signal block and the second correspondence, where the second synchronization signal block is a synchronization signal block corresponding to the location to which the terminal device has moved. Furthermore, the network device sends, to the terminal device, downlink control information for scheduling a paging message in the second paging detection opportunity resource.

[0049] In conjunction with the fourth aspect, in certain implementations of the fourth aspect, the method further includes: determining, by the network device, that the terminal device moves from a first location area to a second location area, where the first location area is the location area corresponding to the first synchronization signal block. The network device determines, based on a third correspondence, the second synchronization signal block corresponding to the second location area in the third correspondence, where the third correspondence is a correspondence between multiple synchronization signal blocks and multiple location areas.

[0050] In conjunction with the fourth aspect, in certain implementations of the fourth aspect, the method further includes: the network device receiving fifth information from the terminal device, where the fifth information is used to indicate one or more of the following:

[0051] the second synchronization signal block, the location to which the terminal device moves, or the second location area,

[0052] The location to which the terminal device moves belongs to the second location area. The beneficial effects of the above implementation can be found in the description of the beneficial effects of the corresponding implementation of the first aspect, and will not be repeated here for the sake of brevity.

[0053] In combination with the third aspect or the fourth aspect, in certain implementations of the third aspect or the fourth aspect, the multiple paging detection opportunity resources are paging detection opportunity resources in multiple resource groups, and the interval between two temporally adjacent resource groups is a first time interval, which is configured by the network device.

[0054] In combination with the third aspect or the fourth aspect, in certain implementations of the third aspect or the fourth aspect, the multiple resource groups include a first resource group and a second resource group that are adjacent in time, and the first time interval between the first resource group and the second resource group includes a synchronization signal block group, and the M synchronization signal blocks in the synchronization signal block group correspond one-to-one to the M paging detection opportunity resources in the first resource group, or the M synchronization signal blocks in the synchronization signal block group correspond one-to-one to the M paging detection opportunity resources in the second resource group.

[0055] In combination with the third aspect or the fourth aspect, in certain implementations of the third aspect or the fourth aspect, the multiple paging opportunity resources are paging opportunity resources within a paging cycle, and the method also includes: the terminal device receives third information from the network device, and the third information is used to indicate a first offset, the first offset being the offset between the starting position of the paging cycle and the system frame with frame number 0, and the first offset is greater than the frame length of the system frame.

[0056] In a fifth aspect, a paging method is provided, which can be executed by a terminal device or a module (such as a chip) configured in (or used for) the terminal device. The following description will be given by taking the terminal device executing the paging method as an example.

[0057] The method includes: the terminal device determines a first paging detection opportunity resource based on a first synchronization signal block and a fourth correspondence, wherein the fourth correspondence includes a correspondence between multiple synchronization signal blocks and multiple paging detection opportunity resources in each time period of multiple time periods, the first synchronization signal block is used for time and frequency synchronization between the terminal device and a network device, the first synchronization signal block corresponds to the first paging detection opportunity resource in a first time period of the multiple time periods, and the first time period is the time period in which the terminal device receives the first synchronization signal block. Furthermore, the terminal device detects downlink control information in the first paging detection opportunity resource, and the downlink control information is used to schedule a paging message for the terminal device.

[0058] According to the above scheme, when the location area covered by the synchronization signal identified by the same index of the network device changes over time, the terminal device can determine the PMO resource corresponding to the current service synchronization signal block in the current time period based on the fourth corresponding relationship, and detect the paging DCI on the PMO resource. Compared with the terminal device detecting the paging DCI on each PMO resource, the power consumption of the terminal device can be reduced.

[0059] In combination with the fifth aspect, in some implementations of the fifth aspect, the method further includes: the terminal device receives sixth information from the network device, and the sixth information is used to indicate the fourth corresponding relationship.

[0060] In combination with the fifth aspect, in certain implementations of the fifth aspect, the terminal device receives the sixth information from the network device, including: the terminal device receives the first synchronization signal block; and the terminal device receives the system information block from the network device based on the first synchronization signal block, the system information block including the sixth information.

[0061] In a sixth aspect, a paging method is provided, which can be executed by a network device or a module (such as a chip) configured in (or used for) a network device. The following description will be given by taking the network device executing the paging method as an example.

[0062] The method includes: a network device determining a first paging detection opportunity resource based on a first synchronization signal block and a fourth correspondence, wherein the fourth correspondence includes a correspondence between multiple synchronization signal blocks and multiple paging detection opportunity resources in each time period of multiple time periods, the first synchronization signal block corresponds to the first paging detection opportunity resource in a first time period of the multiple time periods, the first synchronization signal block is used for time and frequency synchronization between a terminal device and a network device, and the first time period is the time period in which the terminal device receives the first synchronization signal;

[0063] The network device sends downlink control information to the terminal device in the first paging detection opportunity resource, where the downlink control information is used to schedule a paging message for the terminal device.

[0064] According to the above scheme, when the location area covered by the synchronization signal identified by the same index of the network device changes over time, the network device can determine the PMO resource corresponding to the service synchronization signal block of the terminal device in the current time period based on the fourth corresponding relationship, and send a paging DCI to the terminal device on the PMO resource. Compared with sending a paging DCI to the terminal device on each PMO resource, it can reduce the power consumption of the network device and improve resource utilization.

[0065] In combination with the sixth aspect, in some implementations of the sixth aspect, the method further includes: the network device sends sixth information to the terminal device, where the sixth information is used to indicate the fourth corresponding relationship.

[0066] In combination with the sixth aspect, in certain implementations of the sixth aspect, the network device sends the sixth information to the terminal device, including: the network device sends a system information block to the terminal device, where the system information block includes the sixth information.

[0067] In combination with the fifth aspect or the sixth aspect, in certain implementations of the fifth aspect or the sixth aspect, the multiple paging detection opportunity resources are paging detection opportunity resources in multiple resource groups, and the interval between two temporally adjacent resource groups is a first time interval, which is configured by the network device.

[0068] In combination with the fifth aspect or the sixth aspect, in certain implementations of the fifth aspect or the sixth aspect, the multiple resource groups include a first resource group and a second resource group that are adjacent in time, and the first time interval between the first resource group and the second resource group includes a synchronization signal block group, and the M synchronization signal blocks in the synchronization signal block group correspond one-to-one to the M paging detection opportunity resources in the first resource group, or the M synchronization signal blocks in the synchronization signal block group correspond one-to-one to the M paging detection opportunity resources in the second resource group.

[0069] In combination with the fifth aspect or the sixth aspect, in certain implementations of the fifth aspect or the sixth aspect, the multiple paging opportunity resources are paging opportunity resources within a paging cycle, and the method also includes: the terminal device receives third information from the network device, and the third information is used to indicate a first offset, the first offset being the offset between the starting position of the paging cycle and the system frame with frame number 0, and the first offset is greater than the frame length of the system frame.

[0070] In the seventh aspect, a communication device is provided. In one design, the device may include a module corresponding to each of the methods / operations / steps / actions described in the first aspect. The module may be a hardware circuit, software, or a combination of a hardware circuit and software. In one design, the device includes: a processing unit, configured to determine a first paging detection opportunity resource based on a first location area where the terminal device is currently located and a first correspondence, wherein multiple location areas in the first correspondence correspond to multiple paging detection opportunity resources, and the first location area corresponds to the first paging detection opportunity resource in the first correspondence. A transceiver unit, configured to receive downlink control information from a network device on the first paging detection opportunity resource, wherein the downlink control information is used to schedule paging messages.

[0071] In combination with the seventh aspect, in some implementations of the seventh aspect, the transceiver unit is further used to receive first information from the network device, and the first information is used to indicate the first corresponding relationship.

[0072] In combination with the seventh aspect, in certain implementations of the seventh aspect, the transceiver unit is specifically used to receive a first synchronization signal block, and the processing unit is specifically used to control the transceiver unit to receive a system information block from the network device based on the first synchronization signal block, where the system information block includes the first information.

[0073] In conjunction with the seventh aspect, in certain implementations of the seventh aspect, the processing unit is further configured to determine that the terminal device has moved from the first location area to a second location area, and, based on the second location area and the first correspondence, determine a second paging detection opportunity resource corresponding to the second location area. The transceiver unit is further configured to receive downlink control information for scheduling a paging message in the second paging detection opportunity resource.

[0074] In combination with the seventh aspect, in certain implementations of the seventh aspect, the transceiver unit is used to send second information to the network device, and the second information is used to indicate the location to which the terminal device moves, or to indicate the second location area, wherein the location to which the terminal device moves belongs to the second location area.

[0075] In an eighth aspect, a communication device is provided. In one design, the device may include a module corresponding to each of the methods / operations / steps / actions described in the second aspect. The module may be a hardware circuit, software, or a combination of a hardware circuit and software. In one design, the device includes: a processing unit for determining a first paging detection opportunity resource based on a first location area where the terminal device is currently located and a first correspondence, wherein multiple location areas in the first correspondence correspond to multiple paging detection opportunity resources, and the first location area corresponds to the first paging detection opportunity resource in the first correspondence. And, a transceiver unit for sending downlink control information to the terminal device on the first paging detection opportunity resource, wherein the downlink control information is used to schedule paging messages.

[0076] In combination with the eighth aspect, in certain implementations of the eighth aspect, the transceiver unit is further used to send first information to the terminal device, where the first information is used to indicate the first corresponding relationship.

[0077] In combination with the eighth aspect, in certain implementations of the eighth aspect, the transceiver unit is specifically used to send a system information block to the terminal device, where the system information block includes the first information.

[0078] In conjunction with the eighth aspect, in certain implementations of the eighth aspect, the processing unit is further configured to determine that the terminal device has moved from the first location area to a second location area, and determine, based on the second location area and the first correspondence, a second paging detection opportunity resource corresponding to the second location area. The transceiver unit is further configured to detect downlink control information for scheduling a paging message in the second paging detection opportunity resource.

[0079] In conjunction with the eighth aspect, in certain implementations of the eighth aspect, the transceiver unit is configured to receive second information from the terminal device, the second information being used to indicate a location to which the terminal device has moved, or being used to indicate the second location area, wherein the location to which the terminal device has moved belongs to the second location area. Furthermore, the processing unit is specifically configured to determine, based on the second information, that the terminal device has moved from the first location area to the second location area.

[0080] In the ninth aspect, a communication device is provided. In one design, the device may include a module corresponding to each of the methods / operations / steps / actions described in the third aspect. The module may be a hardware circuit, software, or a combination of a hardware circuit and software. In one design, the device includes: a processing unit, configured to determine a first paging detection opportunity resource based on a first synchronization signal block and a second correspondence, wherein the first synchronization signal block is used for time and frequency synchronization between the terminal device and the network device, multiple synchronization signal blocks in the second correspondence correspond to multiple paging detection opportunity resources, and the first synchronization signal block corresponds to the first paging detection opportunity resource in the second correspondence. A transceiver unit, configured to receive downlink control information on the first paging detection opportunity resource, wherein the downlink control information is used to schedule paging messages.

[0081] In combination with the ninth aspect, in certain implementations of the ninth aspect, the transceiver unit is further used to receive fourth information from the network device, where the fourth information is used to indicate the second corresponding relationship.

[0082] In combination with the ninth aspect, in certain implementations of the ninth aspect, the transceiver unit is specifically used to receive the first synchronization signal block, and the processing unit is used to control the transceiver unit to receive the system information block from the network device based on the first synchronization signal block, wherein the system information block includes the fourth information.

[0083] In conjunction with the ninth aspect, in certain implementations of the ninth aspect, the processing unit is configured to determine that the terminal device has moved from a first location area to a second location area, where the first location area is the location area corresponding to the first synchronization signal block, and the processing unit is further configured to determine a second paging detection opportunity resource based on the second synchronization signal block corresponding to the second location area and the second correspondence. The transceiver unit is further configured to receive downlink control information for scheduling a paging message in the second paging detection opportunity resource.

[0084] In conjunction with the ninth aspect, in certain implementations of the ninth aspect, the method further includes: the processing unit is further configured to determine, based on the transceiver unit receiving the second synchronization signal block when the terminal device is in the second location area, that the second location area corresponds to the second synchronization signal block. Alternatively, the processing unit is further configured to determine, based on a third corresponding relationship, the second synchronization signal block corresponding to the second location area in the third corresponding relationship, where the third corresponding relationship is a corresponding relationship between multiple synchronization signal blocks and multiple location areas.

[0085] In conjunction with the ninth aspect, in certain implementations of the ninth aspect, the transceiver unit is further configured to send fifth information to the network device, where the fifth information is configured to indicate one or more of the following:

[0086] the second synchronization signal block, the location to which the terminal device moves, or the second location area,

[0087] The location to which the terminal device moves belongs to the second location area.

[0088] In the tenth aspect, a communication device is provided. In one design, the device may include a module corresponding to each of the methods / operations / steps / actions described in the fourth aspect. The module may be a hardware circuit, software, or a combination of a hardware circuit and software. In one design, the device includes: a processing unit, configured to determine a first paging detection opportunity resource based on a first synchronization signal block and a second correspondence, wherein a plurality of synchronization signal blocks in the second correspondence correspond to a plurality of paging detection opportunity resources, and the first synchronization signal block corresponds to the first paging detection opportunity resource in the second correspondence. A transceiver unit, configured to send downlink control information to a terminal device on the first paging detection opportunity resource, the downlink control information being used to schedule paging messages, and the terminal device is a terminal device that is time-frequency synchronized with the network device based on the first synchronization signal block.

[0089] In combination with the tenth aspect, in certain implementations of the tenth aspect, the transceiver unit is further used to send fourth information to the terminal device, where the fourth information is used to indicate the second corresponding relationship.

[0090] In combination with the tenth aspect, in certain implementations of the tenth aspect, the transceiver unit is specifically used to send a system message block to the terminal device, where the system information block includes the fourth information.

[0091] In conjunction with the tenth aspect, in certain implementations of the tenth aspect, the processing unit is further configured to determine a second paging detection opportunity based on the second synchronization signal block and the second correspondence, where the second synchronization signal block is a synchronization signal block corresponding to the location to which the terminal device has moved. Furthermore, the transceiver unit is further configured to send downlink control information for scheduling a paging message to the terminal device in the second paging detection opportunity resource.

[0092] In conjunction with the tenth aspect, in certain implementations of the tenth aspect, the processing unit is further configured to determine that the terminal device has moved from a first location area to a second location area, where the first location area is the location area corresponding to the first synchronization signal block. Furthermore, the processing unit is further configured to determine, based on a third correspondence, the second synchronization signal block corresponding to the second location area in the third correspondence, where the third correspondence is a correspondence between multiple synchronization signal blocks and multiple location areas.

[0093] In conjunction with the tenth aspect, in certain implementations of the tenth aspect, the transceiver unit is further configured to receive fifth information from the terminal device, where the fifth information is configured to indicate one or more of the following:

[0094] the second synchronization signal block, the location to which the terminal device moves, or the second location area,

[0095] The location to which the terminal device moves belongs to the second location area.

[0096] On the eleventh aspect, a communication device is provided. In one design, the device may include a module corresponding to the method / operation / step / action described in the fifth aspect. The module may be a hardware circuit, software, or a combination of a hardware circuit and software. In one design, the device includes: a processing unit, configured to determine a first paging detection opportunity resource based on a first synchronization signal block and a fourth corresponding relationship, wherein the fourth corresponding relationship includes a corresponding relationship between multiple synchronization signal blocks and multiple paging detection opportunity resources in each time period of multiple time periods, the first synchronization signal block is used for time and frequency synchronization between the terminal device and the network device, the first synchronization signal block corresponds to the first paging detection opportunity resource in a first time period of the multiple time periods, and the first time period is the time period to which the terminal device receives the first synchronization signal. And, a transceiver unit, configured to receive downlink control information in the first paging detection opportunity resource, the downlink control information being used to schedule paging messages for the terminal device.

[0097] In combination with the eleventh aspect, in certain implementations of the eleventh aspect, the transceiver unit is further used to receive sixth information from the network device, where the sixth information is used to indicate the fourth corresponding relationship.

[0098] In combination with the eleventh aspect, in certain implementations of the eleventh aspect, the transceiver unit is specifically used to receive the first synchronization signal block; and the processing unit controls the transceiver unit to receive the system information block from the network device based on the first synchronization signal block, and the system information block includes the sixth information.

[0099] In the twelfth aspect, a communication device is provided. In one design, the device may include a module corresponding to the method / operation / step / action described in the sixth aspect. The module may be a hardware circuit, software, or a combination of a hardware circuit and software. In one design, the device includes: a processing unit, configured to determine a first paging detection opportunity resource based on a first synchronization signal block and a fourth corresponding relationship, wherein the fourth corresponding relationship includes a corresponding relationship between multiple synchronization signal blocks and multiple paging detection opportunity resources in each time period of multiple time periods, the first synchronization signal block corresponds to the first paging detection opportunity resource in a first time period of the multiple time periods, the first synchronization signal block is used for time and frequency synchronization between a terminal device and a network device, and the first time period is the time period to which the terminal device receives the first synchronization signal. A transceiver unit, configured to send downlink control information to the terminal device in the first paging detection opportunity resource, the downlink control information being used to schedule a paging message for the terminal device.

[0100] In combination with the twelfth aspect, in certain implementations of the twelfth aspect, the transceiver unit is further used to send sixth information to the terminal device, where the sixth information is used to indicate the fourth corresponding relationship.

[0101] In combination with the twelfth aspect, in certain implementations of the twelfth aspect, the transceiver unit is specifically used to send a system information block to the terminal device, where the system information block includes the sixth information.

[0102] In a thirteenth aspect, a communication device is provided, comprising a processor. The processor can implement the method in any possible implementation of the first, third, or fifth aspects above. Optionally, the communication device further comprises a memory, the processor is coupled to the memory, and can be used to execute instructions in the memory to implement the method in any possible implementation of the first, third, or fifth aspects above. Optionally, the communication device further comprises a communication interface, the processor is coupled to the communication interface. In the embodiment of the present application, the communication interface can be a transceiver, pin, circuit, bus, module, or other type of communication interface, without limitation.

[0103] In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input / output interface.

[0104] In another implementation, the communication device is a chip configured in a terminal device. When the communication device is a chip configured in a terminal device, the communication interface may be an input / output interface.

[0105] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0106] In a fourteenth aspect, a communication device is provided, comprising a processor. The processor can implement the method described in any possible implementation of the second, fourth, or sixth aspects. Optionally, the communication device further comprises a memory, the processor being coupled to the memory and configured to execute instructions in the memory to implement the method described in any possible implementation of the second, fourth, or sixth aspects. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

[0107] In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver or an input / output interface.

[0108] In another implementation, the communication device is a chip configured in a network device. When the communication device is a chip configured in a network device, the communication interface may be an input / output interface.

[0109] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0110] In a fifteenth aspect, a processor is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method of any possible implementation of aspects 1 to 6.

[0111] In a specific implementation, the processor may be one or more chips, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, or various logic circuits. The input signal received by the input circuit may be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter. The input circuit and the output circuit may be the same circuit, which functions as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation of the processor and various circuits.

[0112] In the sixteenth aspect, a computer program product is provided, which includes: a computer program (also referred to as code, or instructions), which, when executed, enables a computer to execute a method in any possible implementation of the above-mentioned first to sixth aspects.

[0113] In the seventeenth aspect, a computer-readable storage medium is provided, which stores a computer program (also referred to as code, or instructions) which, when run on a computer, enables the computer to execute a method in any possible implementation of the above-mentioned first to sixth aspects.

[0114] In certain embodiments of the seventeenth aspect, the computer that executes the method in any possible implementation of the first, third or fifth aspects may be the above-mentioned terminal device, or the computer that executes the method in any possible implementation of the second, fourth or sixth aspects may be the above-mentioned network device.

[0115] In the eighteenth aspect, a communication system is provided, comprising at least one terminal device and at least one network device as mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0116] Figure 1 is a schematic diagram of a communication system provided by an embodiment of the present application;

[0117] Figure 2 Schematic diagram of an NTN network architecture applicable to the embodiment of the present application;

[0118] Figure 2a is another schematic diagram of the NTN network architecture applicable to the embodiment of the present application;

[0119] Figure 3 This is a schematic diagram of PF and PMO resources provided in an embodiment of the present application;

[0120] Figure 4 This is a schematic flow chart of the paging method provided in an embodiment of the present application;

[0121] Figure 5 This is a schematic diagram of the first correspondence provided in an embodiment of the present application;

[0122] Figure 6 Schematic diagram of the coverage of a staring mode satellite provided in an embodiment of the present application;

[0123] Figure 7 Schematic diagram of the coverage of a non-staring mode satellite provided in an embodiment of the present application;

[0124] Figure 8 、 Figure 9is another schematic flow chart of the paging method provided in an embodiment of the present application;

[0125] Figures 10 to 13 is a schematic diagram of a PMO resource group provided in an embodiment of the present application;

[0126] Figure 14 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0127] Figure 15 This is a schematic structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0128] The technical solution in this application will be described below with reference to the accompanying drawings.

[0129] In this application, at least one (item) can also be described as one (item) or multiple (items), and multiple (items) can be two (items), three (items), four (items), or more (items), without limitation. " / " can indicate that the objects associated with each other are in an "or" relationship. For example, A / B can mean A or B. "And / or" can be used to describe that there are three relationships between the associated objects. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. To facilitate the description of the technical solutions of this application, words such as "first," "second," "A," or "B" can be used to distinguish technical features with the same or similar functions. The words "first," "second," "A," or "B" do not limit the quantity or execution order. Moreover, the words "first," "second," "A," or "B" do not necessarily mean different. The words "exemplary" or "for example" are used to indicate an example, instance, or illustration. Any design solution described as "exemplary" or "for example" should not be interpreted as being preferred or advantageous over other designs. The use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0130] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as long term evolution (LTE) systems, 5G systems or new radio (NR) systems, and future communication systems, such as sixth generation mobile communication systems. These communication systems can use non-terrestrial networks (NTN) technology to provide cellular coverage, which is not limited in this application.

[0131] Figure 1 FIG. 1 is a schematic diagram of an architecture of a communication system 100 applicable to an embodiment of the present application. Figure 1As shown, the communication system 100 may include at least one network device (such as Figure 1 110a, 110b, 110c), and may further include at least one terminal (such as Figure 1 120a-120j in FIG). Network devices may be connected to each other via wired or wireless means. Figure 1 This is just a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices.

[0132] In the NTN network, satellites can realize transparent payload transmission or regenerative payload transmission.

[0133] Figure 2 FIG. 1 is a schematic diagram of an NTN network architecture applicable to an embodiment of the present application. Figure 2 As shown, user equipment (UE) communicates with a terrestrial base station via the user-universal terrestrial radio access network (Uu) interface. Satellites enable transparent payload transmission between users and terrestrial base stations. Satellites and NTN gateways can be considered remote radio units (RNNs) of terrestrial base stations, enabling transparent signal forwarding. Satellites only support functions such as RF filtering, frequency conversion, and amplification, leaving the signal waveform unchanged. Satellite forwarding is transparent to terminal devices. Furthermore, terrestrial base stations and the core network (CN) can communicate via the next generation (NG) interface, exchanging core network non-access stratum (NAS) signaling and UE service data via the NG interface.

[0134] Figure 2a is another schematic diagram of the NTN network architecture applicable to the embodiment of the present application, such as Figure 2a As shown, the satellite has some or all functions of the access network equipment, which can be called a satellite base station. It can provide wireless access services and schedule wireless resources for terminal devices that access the network through the satellite base station. The satellite base station communicates with the UE through the Uu interface. Among them, the satellite base station and the CN can communicate through the NG interface, and the satellite base station and the core network can exchange NAS signaling and UE business data through the NG interface. The satellite radio interface (SRI) interface is the feeder link between the NTN gateway and the satellite. Figure 2aIn the NG, the SRI interface can be used as part of the NG interface to realize communication interaction between the satellite and the core network.

[0135] The network device provided in the embodiments of the present application may be an access network device, such as a base station, a Node B, an evolved Node B (eNodeB or eNB), a transmission reception point (TRP), a next generation Node B (gNB) in a fifth generation (5G) mobile communication system, an access network device in an open radio access network (O-RAN or open RAN), a next generation base station in a sixth generation (6G) mobile communication system, or a base station in a future mobile communication system, or an access node in a wireless fidelity (WiFi) system, etc. Alternatively, the network device may be a module or unit that performs part of the functions of a base station, for example, a centralized unit (CU), a distributed unit (DU), a centralized unit control plane (CU-CP) module, or a centralized unit user plane (CU-UP) module, etc. The network device may be a satellite (such as Figure 1 110a in Figure 2 Satellite base stations in the , can also be macro base stations (such as Figure 1 110b in the figure), the access network device can also be a micro base station or an indoor station (such as Figure 1 110c), it may also be a relay node or a donor node, etc. The present application does not limit the specific technology and specific device form used by the access network device.

[0136] In the embodiment of the present application, some or all of the functions of the network device may be on a non-terrestrial network (NTN) platform (NTN platforms include but are not limited to satellites, unmanned aircraft systems (UAS), high altitude platform stations (HAPS), etc.), or some or all of the functions of the network device may be on the ground, and the NTN platform is responsible for forwarding signals between the UE and the access network device.

[0137] The terminal device provided in the embodiment of the present application may also be referred to as a terminal, including but not limited to: user equipment (UE), mobile station, or mobile terminal. The terminal device can be widely used in various scenarios for communication. The scenario includes, for example, but not limited to at least one of the following scenarios: enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), massive machine-type communications (mMTC), device-to-device (D2D), vehicle to everything (V2X), machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, or smart city, etc. The terminal device can be a mobile phone (such as Figure 1 Mobile phones 120a, 120d, 120f), tablet computers, computers with wireless transceiver functions (such as Figure 1 Computers (120g), wearable devices, vehicles (such as Figure 1 120b shown), drones, helicopters, airplanes (such as Figure 1 120c in ), ships, robots, robotic arms, or smart home devices (such as Figure 1 The present application does not limit the specific technology and specific device form adopted by the terminal device.

[0138] Base stations and / or terminal devices can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; on water; or in the air on aircraft, balloons, and satellites. This application does not limit the environments or scenarios in which base stations and terminal devices are located.

[0139] Currently, the terminal device detects the downlink control information (DCI) used to schedule the paging message on the paging frame (PF) within the discontinuous reception (DRX) cycle. The DRX cycle can also be called the paging cycle. Figure 3 As shown, a DRX cycle T can include N PFPFs, one PF is a radio frame, and the system frame number (SFN) of the PF satisfies the following formula:

[0140] (SFN+PF_offset)mod T=(T div N PF )*(UE_ID mod N PF ),

[0141] T div N PF Indicates that a DRX cycle T is divided into N equal parts PF After the system frame group, each system frame group contains the number of system frames. UE_ID is the identifier (ID) of the terminal device, the N PF The first system frame in the (UE_ID mod N)th system group in the system group is PF.

[0142] The network device will configure the DRX cycle T for the terminal device. For example, the cycle T can be 32 radio frames, 64 radio frames, etc., and the network device will also configure the N number for determining the number of paging frames for the terminal device. PF , N PF The value can be T, T / 2, T / 4, T / 8, T / 16.

[0143] A PF includes Ns paging occasions (POs). PO is a collection of physical downlink control channel (PDCCH) monitoring opportunity (PMO) resources. The index i_s of PO satisfies the following formula:

[0144] i_s=floor(UE_ID / N PF )mod Ns

[0145] Where floor(UE_ID / N) represents the result of dividing UE_ID by N and rounding down. Each PO includes PMO resources in S consecutive time slots, where S is the number of synchronization signal blocks and physical broadcast channel (PBCH) blocks actually broadcast in a burst set.

[0146] like Figure 3As shown, S=8, and the PO includes PMO resources located in eight consecutive time slots. That is, the eight time slots from time slot 0 to time slot 7 include PMO resources 0 to PMO resources 7, respectively. These eight PMO resources correspond to the eight SSBs actually broadcast in an SSB burst group. Each PMO resource uses the transmit beam direction of the corresponding SSB to transmit the DCI for scheduling the paging message. This DCI is carried on the PDCCH in the PMO resource. In other words, the PDCCH in each PMO resource uses the transmit beam direction of the corresponding SSB to transmit the DCI for scheduling the paging resource.

[0147] When the network device needs to send a paging message to the terminal device, since the network device is not sure within which SSB beam range the terminal device is located, the network device sends the DCI for scheduling the paging message on each PMO resource in a PO through the corresponding SSB beam direction, so that the DCI covers the service range of the network device. Accordingly, the terminal device detects the DCI sent by the network device for scheduling the paging message on each PMO resource. The network device configures a paging-radio network temporary identifier (P-RNTI) for the terminal device, and the DCI for scheduling the paging message sent by the network device to the terminal device is scrambled by the P-RNTI. The terminal device can detect the DCI for scheduling the paging message of the terminal device based on the P-RNTI. The DCI schedules the PDSCH that carries the paging message. After receiving the DCI, the terminal device receives the paging message on the PDSCH scheduled by the DCI.

[0148] However, for network devices with a large coverage area and a large number of service beams. For example, for network devices in non-terrestrial networks (NTN), taking satellites as network devices in NTN as an example, for low-orbit C-band satellites with an orbital altitude of 508km, the coverage area that can meet the access conditions is about 10,000 square kilometers. When the beam width is 4.6 degrees, about 650 service beams are required to cover the coverage area that meets the access conditions. If the above-mentioned paging method is still used for network devices with a large coverage area and a large number of service beams, the network device needs to send a DCI for scheduling paging messages of a terminal device on hundreds of PMO resources. Accordingly, the terminal device needs to detect whether the DCI exists on hundreds of PMO resources. The power consumption overhead of the terminal device is too large.

[0149] This application provides a paging method in which a terminal device can determine a corresponding PMO resource based on its location, and then detect DCI for scheduling paging messages on the PMO resource corresponding to the terminal device's location. This method can reduce power consumption of the terminal device. Furthermore, the terminal device can report information related to its location to a network device, so that the network device can send the DCI for scheduling paging messages of the terminal device on the PMO resource corresponding to the location based on the terminal device's location. This method can reduce power consumption of the network device and improve resource utilization.

[0150] Figure 4 This is a schematic flowchart of the paging method provided in an embodiment of the present application.

[0151] S401, the terminal device determines a first PMO resource based on a first location area where the terminal device is currently located and a first correspondence, wherein multiple location areas in the first correspondence correspond to multiple PMO resources, and the first location area corresponds to the first PMO resource in the first correspondence.

[0152] The terminal device can obtain the location information of the current location of the terminal device. For example, the terminal device can receive a positioning signal and obtain the location information of the current location of the terminal device according to the positioning signal. The positioning signal can be from Figure 4 The network device shown may be from other network devices used for positioning, such as a positioning satellite. The terminal device may determine, based on the current location information, that the current location of the terminal device is in a first location area among multiple location areas in the first corresponding relationship, and the first location area corresponds to the first PMO resource in the first corresponding relationship. The terminal device may then determine to detect a DCI for scheduling a paging message for the terminal device on the first PMO resource.

[0153] Optionally, the network device sends first information to the terminal device, where the first information is used to indicate the first corresponding relationship. Correspondingly, the terminal device receives the first information from the network device and determines the first corresponding relationship.

[0154] For example Figure 5As shown, the service range of the network device covers location area 0 to location area N, and the network device can determine the first correspondence between the location area and the PMO resource, such as in the first correspondence, location area 0 corresponds to PMO resource 0, location area 1 corresponds to PMO resource 1, ..., location area N corresponds to PMO resource N. The network device configures the PMO resources corresponding to each location area in the coverage area for the terminal device through the first information, where N is a positive integer. The terminal device can determine the first PMO based on the first location area and the first correspondence. This allows a terminal device in a location area to detect paging DCI only on the PMO resource corresponding to the location area, without having to detect paging DCI on each PMO resource, thereby reducing the power consumption of the terminal device.

[0155] Exemplarily, the network device may configure the N location areas for the terminal device in a manner that the longitude coordinates and latitude coordinates are indicated by the first information, and the terminal device determines the N location areas based on the longitude coordinates and latitude coordinates indicated by the first information. Alternatively, the location areas and corresponding identifiers may be predefined in a predefined manner, and the network device may notify the terminal device of the N location areas by indicating the identifiers of the location areas through the first information. The terminal device determines the corresponding N location areas based on the N identifiers indicated in the first information. Alternatively, the network device may indicate the location areas in other ways, which is not limited in this application. It should be noted that different location areas may be of different sizes, and this application does not limit the shape of the location areas, and may be implemented according to specific implementation requirements.

[0156] In one implementation, the first information is carried in a master information block (MIB).

[0157] For example, the terminal device receives the SSB from the network device, obtains the MIB carried on the PBCH in the SSB, and thereby determines the first corresponding relationship based on the first information of the MIB.

[0158] In another embodiment, the first information is carried in a system information block (SIB). Optionally, the terminal device receives the first information from the network device, including: the terminal device receives a first synchronization signal block, and receives a system information block from the network device based on the first synchronization signal block, where the system information block includes the first information.

[0159] For example, the terminal device receives an SSB from a network device, and receives SIB1 according to the MIB in the SSB. For example, the SIB1 includes the first information, and the terminal device determines the first correspondence based on the first information in the SIB1. Alternatively, the SIB1 includes scheduling information of other SIBs that carry other system information (OSI), and the terminal device receives other SIBs based on the scheduling information, and the other SIBs include one or more of SIB2 to SIB9. The first information can be carried as an OSI in at least one SIB from SIB2 to SIB9, and the terminal device determines the first correspondence based on the first information. After determining the first correspondence, the terminal device determines the first PMO resource based on the first location area where the current location is located and the first correspondence. This application is not limited to this.

[0160] S402: The terminal device detects DCI on the first PMO resource, where the DCI is used to schedule a paging message.

[0161] If the network device needs to send a paging message to the terminal device, the network device sends a paging DCI to the terminal device on the first PMO resource. The terminal device can detect the DCI on the first PMO resource. For example, the terminal device scrambles the P-RNTI configured by the network device for the terminal device based on the P-RNTI. For example, the P-RNTI can be used as a decryption code to scramble the cyclic redundancy check (CRC) field in the DCI. The terminal device detects whether there is a P-RNTI-scrambled DCI on the PMO resource. If a P-RNTI-scrambled DCI is detected, the DCI indicates the PDSCH carrying the paging message and the relevant parameters for demodulating and decoding the paging message. The terminal device can determine the PDSCH resource carrying the paging message based on the DCI, and receive the paging message from the network device on the PDSCH resource. If the P-RNTI-scrambled DCI is not detected, the terminal device believes that the network device has not sent the paging DCI.

[0162] If the terminal device detects a paging DCI from the network device on the first PMO resource, the terminal device determines the PDSCH carrying the paging message based on the paging DCI received on the first PMO resource, and thereby receives the paging message from the network device on the PDSCH.

[0163] Optionally, the terminal device moves from the first location area to the second location area. The terminal device determines a second PMO resource corresponding to the second location area based on the second location area and the first correspondence. The terminal device detects a paging DCI in the second PMO resource.

[0164] If the terminal device moves, such as the terminal device moves from the first location area in the first correspondence to the second location area, the terminal device can determine the second PMO resource corresponding to the second location area based on the first correspondence, and the terminal device detects the DCI for scheduling the paging message of the terminal device on the second PMO resource in the second location area.

[0165] exist Figure 4 In the illustrated embodiment, when the network device needs to page the terminal device, it can send a paging DCI on each PMO resource, and the terminal device can detect the paging DCI on the first PMO resource. Alternatively, the network device can determine the first PMO resource based on the first location area where the terminal device is currently located and the first corresponding relationship, and send a paging DCI to the terminal device on the first PMO resource, which can reduce the power consumption of the network device and improve resource utilization. The terminal device can send information 1 to the network device, and the information 1 is used to indicate the location of the terminal device, such as information 1 can be location information of the current location of the terminal device, or the information 1 is used to indicate the first location area. The network device determines that the terminal device is currently located in the first location area through the information 1.

[0166] For example, the information 1 is the location information of the current location of the terminal device. After receiving the information 1, the network device can determine that the terminal device is located in the first location area of ​​multiple location areas in the first corresponding relationship based on the location information of the current location of the terminal device. The network device can then determine the first PMO resource corresponding to the first location area. The network device can then determine that the terminal device detects the DCI for scheduling paging messages on the first PMO resource. The DCI for scheduling paging messages will be referred to as paging DCI hereinafter, but this application does not limit the name of the DCI in the specific implementation. When the network device needs to send a paging message to the terminal device, the network device can send the paging DCI to the terminal device on the first PMO resource.

[0167] For another example, the information 1 is used to indicate a first location area. After receiving the information 1, the network device determines that the terminal device is located in the first location area, and can determine a first PMO resource based on the first correspondence. When the network device needs to send a paging message to the terminal device, the network device can send a paging DCI to the terminal device on the first PMO resource.

[0168] Optionally, after the terminal device moves to the second location area, the terminal device sends second information to the network device, where the second information is used to indicate the location to which the terminal device moves, or the second information is used to indicate the second location area.

[0169] Accordingly, after receiving the second information from the terminal device, the network device determines that the terminal device has moved to the second location area, and the PMO resource used by the terminal device to detect the paging DCI is changed from the first PMO resource to the second PMO resource corresponding to the second location area. When the network device needs to send a paging message to the terminal device, it sends the paging DCI to the terminal device on the second PMO resource.

[0170] Figure 4 The illustrated embodiment can be applied to both scenarios where the network device is a staring mode satellite and scenarios where the network device is a non-staring mode satellite. The network device can determine the PMO resources for the terminal device to detect the paging DCI based on the location area where the terminal device is located, and when the network device needs to send a paging message to the terminal device, the network device can determine the transmitting beam whose beam direction corresponds to the location area where the terminal device is located based on the location area where the terminal device is located, that is, the coverage range of the transmitting beam includes the location area, and the paging DCI is sent to the terminal device on the PMO resources for the terminal device to detect the paging DCI through the transmitting beam, and the paging message is sent to the terminal device on the PDSCH indicated by the paging DCI through the transmitting beam.

[0171] A staring mode satellite means that the coverage of the same synchronization signal block (i.e., the synchronization signal block with the same index identifier) ​​of the satellite is in the same location area in different time periods, that is, the coverage of the synchronization signal block does not change over time. Figure 6 As shown, the service range of the staring mode satellite of the network device includes N SSBs (i.e., an example of a synchronization signal block) to provide access and synchronization services. The corresponding relationship between the SSB of the network device and the location area remains unchanged, that is, the location area covered by the coverage range of the SSB remains unchanged. Figure 6 As shown, SSB 0 corresponds to location area 0, SSB 1 corresponds to location area 1, ..., SSB N corresponds to location area N. If the terminal device is in location area 1, the network device can use a transmission beam consistent with the beam direction of the transmission beam of SSB 1 to send a paging DCI to the terminal device on the PMO resource corresponding to location area 1 and send a paging message on the PDSCH indicated by the paging DCI.

[0172] A non-staring mode satellite is one in which the beam direction (e.g., beam weight) of the same synchronization signal block (i.e., the synchronization signal block with the same index identifier) ​​does not change over time, but the coverage range does change over time. That is, the location area covered by the beam of the same synchronization signal block changes over time. For example Figure 7 As shown, the N SSBs within the service range of the non-staring mode satellite as a network device have different corresponding location areas in the first time period and the second time period, as shown in FIG. Figure 7As shown, in the first time period, SSB0 corresponds to location area 0, SSB 1 corresponds to location area 1, ..., SSB N corresponds to location area N. In the second time period, SSB0 corresponds to location area 1, SSB 1 corresponds to location area 2, ..., SSB N corresponds to location area N+1. If the terminal device is in location area 1 in both the first time period and the second time period, the terminal device and the network device can determine the detection of paging DCI in the PMO resource 1 corresponding to location area 1 based on the first corresponding relationship. If the network device needs to send a paging message to the terminal device in the first time period, the network device can use the beam corresponding to SSB1 whose beam direction covers location area 1 in the first time period to send a paging DCI to the terminal device on the PMO resource 1, and send a paging message on the PDSCH indicated by the paging DCI. The terminal device can detect the paging DCI on the PMO resource 1 and receive the paging message according to the DCI. If the network device needs to send a paging message to the terminal device in the second time period, the network device may use the beam corresponding to SSB2 whose beam direction covers location area 1 in the second time period to send a paging DCI to the terminal device on PMO resource 1, and send a paging message on the PDSCH indicated by the paging DCI. The terminal device may detect the paging DCI on the PMO resource 1 and receive the paging message according to the DCI.

[0173] Figure 8 This is another schematic flowchart of the paging method provided in an embodiment of the present application.

[0174] S801, the terminal device determines the first PMO resource based on the first synchronization signal block and the second correspondence, wherein the multiple synchronization signal blocks in the second correspondence correspond to the multiple paging detection opportunity resources, and the first synchronization signal block corresponds to the first PMO resource in the second correspondence, and the first synchronization signal block is used for the terminal device and the network device to achieve downlink time and frequency synchronization.

[0175] Exemplarily, the synchronization signal block can be an SSB. For example, the network device includes N SSBs within its service range, where N is a positive integer. Each SSB provides network services such as access and synchronization to terminal devices within its beam coverage. The terminal device can achieve downlink time and frequency synchronization with the network device based on SSB1.

[0176] For example, the first synchronization signal block may be a synchronization signal block with the highest signal quality among multiple synchronization signal blocks that the terminal device can receive from the network device. The signal quality of the synchronization signal block may include, but is not limited to, one or more of a received signal strength indicator (RSSI) of the synchronization signal block (such as a synchronization signal in the synchronization signal block), a reference signal receiving power (RSRP), a reference signal receiving quality (RSRQ), or a signal to interference plus noise ratio (SINR).

[0177] The terminal device can determine the first PMO resource corresponding to the first synchronization signal block in the second corresponding relationship, thereby determining to detect the paging DCI on the first PMO resource.

[0178] Optionally, the network device sends fourth information to the terminal device, where the fourth information is used to indicate the second corresponding relationship. Correspondingly, the terminal device receives the fourth information from the network device and determines the second corresponding relationship based on the fourth information.

[0179] The network device can determine the second correspondence between SSB and PMO resources, such as in the second correspondence, SSB 0 corresponds to PMO resource 0, SSB 1 corresponds to PMO resource 1, ..., SSB N corresponds to PMO resource N. The network device configures the PMO resource corresponding to each SSB for the terminal device through the fourth information, and the terminal device within the beam coverage of an SSB can receive the paging DCI on the PMO resource corresponding to the SSB. This allows the terminal device to determine the first PMO resource based on the synchronization signal block with the highest signal quality that it can receive (i.e., the first synchronization signal block) and the second correspondence. This allows the terminal device to detect the paging DCI only on the PMO resource corresponding to the first synchronization signal block, without having to detect the paging DCI on each PMO resource, thereby reducing the power consumption of the terminal device.

[0180] In one implementation, the fourth information is carried in the SIB.

[0181] Optionally, the terminal device receives the fourth information from the network device, including: the terminal device receives a first synchronization signal block, and based on the first synchronization signal block, receives a system information block from the network device, wherein the system information block includes the fourth information.

[0182] As an example but not limitation, the SIB is SIB1 or other SIB that carries OSI. Figure 4 In the illustrated embodiment, the system information block includes the first information, which will not be described in detail here for the sake of brevity.

[0183] S802: The terminal device detects DCI on the first PMO resource, where the DCI is used to schedule a paging message.

[0184] The specific implementation of the above S802 can refer to the above Figure 4 The description of S402 shown is omitted here for the sake of brevity.

[0185] exist Figure 8 In the illustrated embodiment, when a network device needs to page a terminal device, it can send a paging DCI on each PMO resource, and the terminal device can detect the paging DCI on the first PMO resource. Alternatively, the network device determines the first PMO resource for the terminal device to detect the DCI for scheduling the paging message based on the first synchronization signal block and the second correspondence. This can reduce power consumption of the network device and improve resource utilization.

[0186] The terminal device may send information 2 to the network device, and the network device determines that the synchronization signal block used by the terminal device for time and frequency synchronization is the first synchronization signal block based on the information 2. Optionally, the information 2 is used to indicate one or more of the following:

[0187] The first synchronization signal block, the first PMO resource, the location information of the current location of the terminal device, or the first location area,

[0188] The coverage range of the first synchronization signal block is the first location area, or in other words, the first location area is the location area where the terminal device receives the first synchronization signal block.

[0189] For example, information 2 is used to indicate the first synchronization signal block. The terminal device notifies the network device that the synchronization signal block currently used for time and frequency synchronization is the first synchronization signal block. This enables the network device to determine that the PMO resource for the terminal device to detect paging DCI is the first PMO resource based on the first synchronization signal block and the second correspondence between the serving terminal device. This enables the network device and the terminal device to reach a consensus on the PMO resource for the terminal device to detect paging DCI, thereby improving the reliability of paging.

[0190] For another example, information 2 is used to indicate the location information or the first location area of ​​the terminal device's current location. After receiving information 2, the network device can determine that the terminal device is within the coverage of the first synchronization signal block based on the location information or the first location area of ​​the terminal device's current location. Then, based on the first synchronization signal and the second correspondence, determine the first PMO resource for the terminal device to detect the paging DCI. This allows the network device and the terminal device to reach a consensus on the PMO resource for the terminal device to detect the paging DCI.

[0191] Information 2 may also indicate the first synchronization signal block, the first PMO resource, the location information of the current location of the terminal device, or multiple items in the first location area. For example, information 2 may indicate the first synchronization signal block and the first PMO resource, or include the first synchronization signal block and the location information of the current location of the terminal device. This application is not limited to this.

[0192] The terminal device can determine that the first location area corresponds to the first synchronization signal block based on but not limited to the following implementation methods.

[0193] In one embodiment, the synchronization signal block with the strongest signal quality among the synchronization signal blocks received by the terminal device is the first synchronization signal block, and it is determined that the current position of the terminal device or the first position area it is in corresponds to the first synchronization signal block.

[0194] For example, the terminal device can determine that the terminal device is within the beam coverage of the first synchronization signal block based on the synchronization signal block with the highest signal quality among the synchronization signal blocks of the network device that the terminal device can receive as the first synchronization signal block, thereby determining that the current position of the terminal device or the first position area it is in corresponds to the first synchronization signal block.

[0195] In another embodiment, the terminal device determines that the first location area corresponds to the first synchronization signal block based on a third correspondence relationship, wherein the third correspondence relationship is a correspondence relationship between multiple synchronization signal blocks and multiple location areas, and the first location area corresponds to the first synchronization signal block in the third correspondence relationship.

[0196] Optionally, the network device may send information 3 to the terminal device, where the information 3 is used to indicate the third corresponding relationship. Correspondingly, the terminal device receives the information 3 and determines the third corresponding relationship.

[0197] For example, the third correspondence relationship may be as shown in Table 1. The terminal device may determine, based on the location information of the location after movement, that the terminal device is currently located in a first location area of ​​multiple location areas in the third correspondence relationship, thereby determining the first synchronization signal block corresponding to the first location area. The terminal device may then determine, based on the first synchronization signal block and the second correspondence relationship, the second PMO resource corresponding to the second synchronization signal block in the second correspondence relationship.

[0198] Table 1

[0199] Synchronous signal block Location Area First synchronization signal block First location area Second synchronization signal block Second location area … …

[0200] Optionally, the second corresponding relationship may include a third corresponding relationship.

[0201] The second correspondence includes not only the correspondence between the synchronization signal block and the PMO resource, but also the correspondence between the synchronization signal block and the location area, that is, the second correspondence includes the correspondence between the synchronization signal block, the PMO resource and the location area.

[0202] For example, the second correspondence relationship may be as shown in Table 2, wherein the first synchronization signal, the first PMO resource, and the first location area correspond to each other, and the second synchronization signal, the second PMO resource, and the second location area correspond to each other. The terminal device may determine the first location area in the second correspondence relationship based on the location information of the current location, and thereby determine the first PMO resource corresponding to the first location area based on the second correspondence relationship.

[0203] Table 2

[0204] Synchronous signal block PMO Resources Location Area First synchronization signal block First PMO Resource First location area Second synchronization signal block Second PMO Resource Second location area … … …

[0205] After the network device determines the first PMO resource based on the first synchronization signal block and the second correspondence, if the network device needs to send a paging message to the terminal device, the network device sends DCI on the first PMO resource. This DCI is used to schedule the paging message. Accordingly, the terminal device receives DCI from the network device on the first PMO resource. This can reduce power consumption of the network device and the terminal device and improve resource utilization.

[0206] Optionally, the terminal device moves from a first location area to a second location area, where the first location area is a location area corresponding to the first synchronization signal block. The terminal device determines a second PMO resource based on a second synchronization signal block corresponding to the second location area and a second correspondence. The terminal device detects a DCI for scheduling a paging message on the second PMO resource.

[0207] If the beam coverage of the first synchronization signal block is the first location area, and the beam coverage of the second synchronization signal block is the second location area. When the terminal device moves, it moves from the beam coverage of the first synchronization signal block to the beam coverage of the second synchronization signal block. The terminal device can determine the second PMO resource corresponding to the second synchronization signal block based on the second corresponding relationship, thereby determining that the PMO resource for detecting the paging DCI is changed from the first PMO resource to the second PMO resource. The terminal device detects the paging DCI of the terminal device on the second PMO resource within the beam coverage of the second synchronization signal block.

[0208] For example, after moving, the terminal device cannot receive the first synchronization signal block, and the synchronization signal block with the highest signal quality among the synchronization signal blocks that can currently be received is the second synchronization signal block. Or the terminal device can still receive the first synchronization signal block after moving, but the synchronization signal block with the highest signal quality among the synchronization signal blocks that can currently be received is the second synchronization signal block, that is, the signal quality of the first synchronization signal block is lower than the signal quality of the second synchronization signal block. Then the terminal device determines that the synchronization signal block with the highest signal quality among the synchronization signal blocks that can currently be received is the second synchronization signal block, and the terminal device can determine that it has moved from the coverage area of ​​the first synchronization signal block (that is, the first location area) to the coverage area of ​​the second synchronization signal block (that is, the second location area). Therefore, the terminal device determines to detect the paging DCI on the second PMO resource corresponding to the second synchronization signal block. Alternatively, the terminal device can determine, based on the third corresponding relationship, that the position to which the terminal device has moved is in the second location area in the third corresponding relationship, thereby determining the second synchronization signal block corresponding to the second location area in the third corresponding relationship, and then determining the second PMO resource corresponding to the second synchronization signal block based on the second synchronization signal block and the second corresponding relationship.

[0209] Optionally, the terminal device sends fifth information to the network device, where the fifth information is used to indicate one or more of the following:

[0210] A second synchronization signal block, a second PMO resource, a location to which the terminal device moves, or a second location area.

[0211] After the terminal device moves or changes the PMO resource used to detect the paging DCI, it can send a fifth message to the network device so that the network device can determine that the terminal device has moved based on the fifth information and determine the second PMO resource for detecting the paging DCI after the terminal device moves. The specific implementation of the fifth information can refer to the description of information 2 in the previous text, that is, the fifth information and information 2 are two information of the same type (or the same information format) but carry different specific information content.

[0212] The terminal device detects the paging DCI from the network device on the second PMO resource within the coverage of the second synchronization signal. When the network device needs to send a paging message to the terminal device, the network device sends the paging DCI to the terminal device on the second PMO resource, notifying the terminal device of the PDSCH carrying the paging message, so that the terminal device can receive the paging message according to the paging DCI detected on the second PMO resource.

[0213] Figure 8The illustrated embodiment is applicable to scenarios where the network device is a staring mode satellite, that is, the location area covered by the synchronization signal identified by the same index of the network device does not change over time. The terminal device detects the paging DCI on the PMO resource corresponding to the synchronization signal within the coverage range of the synchronization signal used for time and frequency synchronization. When the network device needs to send a paging message to the terminal device, it can use the transmission beam corresponding to the synchronization signal to send the paging DCI to the terminal device on the PMO resource corresponding to the synchronization signal, and send the paging message to the terminal device on the PDSCH indicated by the paging DCI through the transmission beam.

[0214] Figure 9 This is another schematic flowchart of the paging method provided in an embodiment of the present application. Figure 9 The illustrated embodiment provides a solution for a terminal device to detect a paging DCI when the location area covered by the synchronization signal identified by the same index of the network device changes over time. The method includes but is not limited to the following steps:

[0215] S901, the terminal device determines the first PMO resource based on the fourth correspondence and the first synchronization signal block. The fourth correspondence includes the correspondence between multiple synchronization signal blocks and multiple PMO resources in each time period of multiple time periods. The first synchronization signal block is used for the terminal device and the network device to achieve downlink time and frequency synchronization. The first synchronization signal block corresponds to the first PMO resource in the first time period. The first time period is the time period when the terminal device receives the first synchronization signal block.

[0216] For example, network devices are Figure 7 For the non-staring mode satellite shown, the N SSBs within the service range of the network equipment cover different location areas in different time periods. Figure 7As shown, in the first time period, SSB 0 to SSB N correspond to location area 0 to location area N in sequence, and in the second time period, SSB 0 to SSB N correspond to location area 1 to location area N+1 in sequence. The network device can determine the fourth correspondence between each SSB and the PMO resource in different time periods. The network device can determine the fourth correspondence based on the location areas covered by N SSBs in each time period. Exemplarily, the fourth correspondence can be as shown in Table 3, such as the time period from time t0 to time t1 (denoted as [t0, t1), which may include time t0 but not include time t1, but the present application is not limited thereto), SSB 0 to SSB N cover location area 0 to location area N in sequence, then the network device can determine that in the [t0, t1) time period, SSB 0 to SSB N correspond to PMO resource 0 to PMO resource N in sequence, as shown in Table 3. And in the time period from time t1 to time t2 (denoted as the time period [t1, t2), SSB 0 to SSB N sequentially cover location area 1 to location area N+1. Then the network device can determine that in the time period [t1, t2), SSB 0 to SSB N-1 correspond to PMO resource 1 to PMO resource N, and SSB N corresponds to PMO resource 0. It can be understood that the N SSBs correspond to PMO resource 0 to PMO resource N in a cyclic manner in different time periods. Then, in the time period [t2, t3) (not shown in Table 3), SSB 0 to SSBN-2 correspond to PMO resource 2 to PMO resource N, and SSB N-1 and SSB N correspond to PMO resource 0 and PMO resource 1, respectively. The same logic can be applied to other time periods.

[0217] Table 3

[0218]

[0219]

[0220] Optionally, the network device sends sixth information to the terminal device, where the sixth information is used to indicate the fourth corresponding relationship.

[0221] The network device may notify the terminal device of the fourth corresponding relationship through the sixth information, and the terminal device may determine the PMO resources for detecting the paging DCI within the time period based on the SSB currently used for time-frequency synchronization and the time period in which the SSB is received.

[0222] In one implementation, the fourth information is carried in the SIB.

[0223] Optionally, the terminal device receives the sixth information from the network device, including: the terminal device receives a first synchronization signal block, and based on the first synchronization signal block, receives a system information block from the network device, wherein the system information block includes the sixth information.

[0224] As an example but not limitation, the SIB is SIB1 or OSI. Figure 4 In the illustrated embodiment, the system information block includes the first information, which will not be described in detail here for the sake of brevity.

[0225] The following exemplifies how, when the network device indicates the fourth correspondence through the sixth information, the sixth information indicates the time period in the fourth correspondence. It should be understood that the present application is not limited thereto.

[0226] In one example, the sixth information indicates a time period by indicating an absolute time, such as indicating the start time and end time of each time period, or indicating the start time and duration of each time period. In this embodiment of the application, the accuracy of the absolute time and duration of the sixth information is not limited, such as the absolute time and / or duration can be seconds, milliseconds, or microseconds.

[0227] In another example, the sixth information may indicate the start and end times of each time period by indicating an offset from a reference frame. The reference frame may be predefined or preconfigured by the network device. For example, the reference frame is a system frame with a system frame number (SFN) of m, denoted as SFN m, and the sixth information may indicate the number x of time units that the start time of a time period is offset from SFN m, and the number y of time units that the end time is offset from SFN m, where y>x. As an example and not a limitation, the time unit is a system frame, a subframe, a time slot or an OFDM symbol. For example, if the time unit is a system frame, the terminal device may determine that the time period is from SFN m+x to SFN m+y based on the sixth information. Alternatively, the sixth information may indicate the number x of time units that the start time of a time period is offset from SFN m, and the number z of time units that the time period lasts. For example, if the time unit is a system frame, the terminal device may determine that the time period is from SFN m+x to SFN m+x+z based on the sixth information.

[0228] S902: The terminal device detects DCI on the first PMO resource, where the DCI is used to schedule a paging message.

[0229] The specific implementation of the above S902 can refer to the above Figure 4 The description of S402 shown is omitted here for the sake of brevity.

[0230] exist Figure 9In the illustrated embodiment, when a network device needs to page a terminal device, it can send a paging DCI on each PMO resource, and the terminal device can detect the paging DCI on the first PMO resource. Alternatively, the network device determines the first PMO resource for the terminal device to detect the DCI for scheduling the paging message based on the fourth correspondence and the first synchronization signal block. This can reduce power consumption of the network device and improve resource utilization.

[0231] Optionally, the terminal device sends information 4 to the network device, where the information 4 is used to indicate one or more of the following:

[0232] a first synchronization signal block, a first time period, location information of the current location of the terminal device, or a first location area,

[0233] Among them, the first location area is the coverage range of the first synchronization signal, and the location information of the current location of the terminal device belongs to the first location area.

[0234] Correspondingly, the network device receives the information 4 and the fourth corresponding relationship from the terminal device, and determines the first PMO resource for the terminal device to detect the paging DCI.

[0235] For example, the fourth correspondence is shown in Table 4. If the terminal device receives SSB1 within the time period [t0, t1), the terminal device can send information 4 to the network device within the time period [t0, t1) (i.e., an example of the first time period), and the information 4 indicates SSB1 (i.e., an example of the first synchronization signal block). The network device receives the information 4 within the time period [t0, t1), and the network device can determine that the terminal device detects PMO resource 1 (i.e., an example of the first PMO resource) of the paging DCI within the time period [t0, t1) based on the terminal device receiving SSB1 within the time period [t0, t1) and the fourth correspondence.

[0236] For another example, the information 4 sent by the terminal device to the network device may include a first time period and a first synchronization signal block, so that the network device can determine the first PMO resource corresponding to the first synchronization signal block in the first time period in the fourth correspondence relationship based on the fourth correspondence relationship, the first time period and the first synchronization signal block.

[0237] For another example, the information 4 sent by the terminal device to the network device can indicate the current location or the first location area of ​​the terminal device, so that the network device can determine, based on the fourth corresponding relationship, that the terminal device is within the coverage of the first synchronization signal block in the current time period (i.e., the first time period), thereby determining the first PMO resource for the terminal device to detect the paging DCI in the first time period.

[0238] When a network device needs to send a paging message to a terminal device, it sends a paging DCI on the first PMO resource. Accordingly, the terminal device receives DCI from the network device on the first PMO resource. This can reduce power consumption of both the network device and the terminal device, and improve resource utilization.

[0239] In the above embodiment, each location area within the coverage of the network device needs to correspond to a PMO resource, or each synchronization signal block needs to correspond to a PMO resource. The network device transmits a paging DCI on the corresponding PMO resource through the transmission beam in the beam direction corresponding to each location area (such as the transmission beam of the synchronization signal block corresponding to the location area), so that the terminal devices in the corresponding location area can detect their respective paging DCI on the corresponding PMO resource. However, for network devices with a large coverage area, such as satellites in the NTN network as network devices, the number of PMO resources required is more than one hundred. If multiple PMO resources are continuous in the time domain, it will affect the continuity of data communication and cause a large data communication delay. Therefore, the present application proposes that PMO resources can be grouped, and there is a certain time interval between different PMO resource groups. The PMO resources in the same PMO resource group can be located in continuous time units, or can be located in discontinuous time units. The time unit can be an orthogonal frequency division multiplexing (OFDM) symbol group

[0240] Optionally, multiple PMO resources in the above embodiment (such as multiple PMO resources in the first to fourth correspondences in the above embodiment) are PMO resources in multiple resource groups, and the interval between two resource groups adjacent in time is a first time interval, which is configured by the network device.

[0241] For example Figure 10 As shown, taking the subcarrier spacing of 30kHz as an example, every 8 PMO resources form a PMO resource group, as shown in Figure 10 As shown, a system frame includes 20 time slots, and the first time interval between two adjacent PMO resource groups is the frame length of 2 system frames.

[0242] Optionally, the multiple resource groups include a first resource group and a second resource group that are adjacent in time, and a synchronization signal block group is included in a first time interval between the first resource group and the second resource group, and the M synchronization signal blocks in the synchronization signal block group correspond one-to-one to the M PMO resources in the first resource group, or the M synchronization signal blocks in the synchronization signal block group correspond one-to-one to the M PMO resources in the second resource group.

[0243] For example Figure 11As shown, the eight time slots in a system frame with system frame number (SFN) n (denoted as SFN n) each include eight PMO resources in one PMO resource group, and the eight time slots in SFN n+2 each include eight PMO resources in the next PMO resource group. The interval between two adjacent PMO resource groups is two system frame lengths. The first four time slots in SFN n+1 between the two PMO resource groups carry an SSB group. For example, if one time slot carries two SSBs, the SSB group carried by the four time slots includes eight SSBs. The eight SSBs may correspond one-to-one to the eight PMO resources in the PMO resource group in SFN n+2. Figure 11 The SSB group corresponding to the PMO group in SFN n shown can be transmitted in SFN n-1. The network device can send the SSB corresponding to a PMO resource group before the PMO resource group so that the terminal device can perform downlink time and frequency synchronization calibration based on the SSB used for time and frequency synchronization of the terminal device and then detect the paging DCI on the corresponding PMO resource. This improves the reliability of paging terminal devices.

[0244] Optionally, a SIB1 resource group may be included between the synchronization signal group and the temporally adjacent PMO resource group. The SIB1 resource group includes M SIB1s, and the M SIB1s correspond one-to-one to the M SSBs in the synchronization signal block group.

[0245] For example Figure 12 As shown, the first four time slots in SFN n+1 include eight SSBs in an SSB group, and the system frame also includes eight SIB1s corresponding to the eight SSBs. Each SIB1 is transmitted via the beam of the corresponding SSB. The terminal device can determine the time slot where the corresponding SIB1 is located based on the MIB in a received SSB and receive the SIB1. For example, the SIB1 can include paging-related configuration information, including configuration information of PMO resources. When the terminal device has not determined the PMO resource for detecting the paging DCI, it can determine the PMO resource for detecting the paging DCI based on the SIB1, so that the paging DCI can be detected on the corresponding PMO resource in the next system frame.

[0246] Optionally, the time slots where two adjacent PMO resources in the same PMO group are located may be separated by at least one time slot. The at least one time slot may be used to carry OSI, or the at least one time slot may be used for data transmission.

[0247] For example Figure 12As shown, in SFN n and SFN n+2 containing PMO resources, the time slots where two adjacent PMO resources are located are separated by one time slot, and the time domain resources (such as symbols and / or time slots) between the PMO resources can be used to carry OSI and / or for data transmission. And, Figure 12 As shown, in SFN n+1 containing SIB1, the time slots where adjacent SIB1s are located may be separated by one time slot, and the time domain resources (such as symbols and / or time slots) between SIB1s may be used to carry OSI and / or for data transmission, but the present application is not limited thereto.

[0248] Optionally, two adjacent PMO resources in the same PMO group may be respectively included in two adjacent time slots, and the PMO resources in one PMO group may be respectively included in multiple adjacent time slots.

[0249] For example Figure 13 As shown, in SFN n and SFN n+2 containing PMO resources, the 8 PMO resources in the same PMO group are respectively included in 8 consecutive time slots, and the resources other than PMO resources in the SFN containing PMO resources (such as SFN n and SFN n+2) can be used as PDSCH, such as for carrying OSI and / or for service data transmission.

[0250] Optionally, the network device sends third information to the terminal device, where the third information is used to indicate a first offset, which is the offset between the starting position of the paging cycle and the system frame with frame number 0, and the first offset is greater than the frame length of the system frame.

[0251] Accordingly, the terminal device receives third information from the network device. If the third information is included in the paging-related configuration information sent by the network device, the third information indicates a first offset so that the terminal device can determine the starting position of the terminal device's paging cycle based on the first offset and the system frame of SFN 0. The first offset is at least greater than the frame length of one system frame, so that the SSB group corresponding to the first PMO group can be sent before the starting position of the paging cycle.

[0252] For network devices with a larger coverage area, since the number of SSBs that need to cover the service range is large, the corresponding number of PMO resources is also large. The embodiments of the present application provide the following two PMO resource configuration methods.

[0253] Method 1: One SSB burst group includes S SSBs, each L SSB is one SSB group, and one SSB burst group includes SSB groups, one SSB group is located in one system frame, and one paging cycle includes PF, that is, N PF=L, each PF includes L PMO resources corresponding to one SSB group.

[0254] For example, if the number of SSBs included in an SSB burst group is 256, and the network equipment adopts Figure 11 In the transmission mode shown, every 8 SSBs form an SSB group, that is, L=8. 256 SSBs can be divided into 32 groups. Therefore, 32 PFs are required in one paging cycle. One SSB group is located in one system frame. There are two system frames between two adjacent SSB groups. Therefore, 64 system frames are required to complete the transmission of 256 SSBs. It can be seen that the period of an SSB burst group is 64 system frames. Therefore, the paging cycle should also be 64 system frames. The interval between the system frames where each two SSB groups are located is one PF frame. The network device can configure the paging cycle T=64 for the terminal device, and N PF =T / 2=32, then TdivN PF =2, that is, the 64 system frames in a paging cycle are divided into 32 system frame groups, each system frame group includes 2 system frames, and the first system frame in each system frame group is PF. A PF includes PMO resources corresponding to the 8 SSBs in the system frame before the PF, such as Figure 11 The 32 PFs in one paging cycle include 256 PMO resources corresponding to the 256 SSBs in sequence.

[0255] Method 2: One paging cycle includes N PF PF groups, one PF group includes multiple PFs, one PF in a PF group includes L PMO resources corresponding to one SSB group, and one PF group includes PMO resources corresponding one to one to SSBs in an SSB burst group.

[0256] That is to say, in method 2, N PF Used to determine the PF group. Accordingly, N can be increased to meet the above configuration requirements. PF Optional values ​​of T may include, in addition to the optional values ​​described above, one or more optional values ​​of T / 32, T / 64, T / 128, or T / 256. Optional values ​​of the paging cycle T may include 32 system frames, 64 system frames, 128 system frames, and 256 system frames.

[0257] For example, if the number of SSBs included in an SSB burst group is 256, and the network equipment adopts Figure 11 The transmission mode shown in the figure, the network device can configure the paging cycle T = 128, N PF =T / 64, then each cycle includes TdivN PF=2, that is, 2 PF groups. One PF group includes 64 system frames. For example, it can be specified that starting from the second system frame in a PF group, every two system frames are a PF, such as Figure 13 As shown, the first system frame in a PF group is a system frame used by the network device to transmit the first SSB group (SSB 0 to SSB 7) in the SSB burst group. The second system frame is the first PF in the PF group, namely PF0. The PF0 includes PMO resources 0 to PMO resources 7 corresponding one-to-one to the 8 SSBs in the previous system frame. The system frame two system frames apart from the PF0 is the second PF in the PF group, namely PF1. The PF1 includes PMO resources 8 to PMO resources 15 corresponding one-to-one to SSB 8 to SSB 15 in the system frame before PF1. And so on. The last system frame in the PF group is PF31, including PMO resources 248 to PMO resources 255 corresponding one-to-one to SSB 248 to SSB 255 in the last SSB group in the system frame before PF31.

[0258] According to the above two methods, the terminal device can determine the location of the PMO resource corresponding to each SSB in an SSB burst group. The terminal device can determine the location of the PMO resource used by the terminal device to detect the paging DCI based on the location area of ​​the terminal device or the SSB used for time-frequency synchronization. The terminal device detects the paging DCI on the PMO resource in each paging cycle.

[0259] The method provided by the present application is described in detail above in conjunction with the accompanying drawings. The following drawings illustrate the communication apparatus and communication equipment provided by the present application. In order to implement the various functions in the method provided by the present application, each network element may include a hardware structure and / or a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

[0260] Figure 14 This is a schematic block diagram of the communication device provided by this application. Figure 14 As shown, the communication device 1400 may include a transceiver unit 1420 .

[0261] In one possible design, the communication device 1400 may correspond to the terminal device in the above method. When the communication device 1400 corresponds to the terminal device, the communication device 1400 may be a communication device, or the communication device 1400 may be configured in (or used for) a chip in the communication device, or other devices, modules, circuits or units that can implement the method of the terminal device.

[0262] It should be understood that the communication device 1400 may include units for executing the method executed by the terminal device in the above method embodiment. In addition, the units in the communication device 1400 and the above other operations and / or functions are respectively for implementing the corresponding processes of the above method embodiment.

[0263] Optionally, the communication device 1400 may further include a processing unit 1410 , which may be configured to process instructions or data to implement corresponding operations.

[0264] It should also be understood that when the communication device 1400 is a chip configured in (or used in) a terminal device, the transceiver unit 1420 in the communication device 1400 can be the input / output interface or circuit of the chip, and the processing unit 1410 in the communication device 1400 can be the processor in the chip.

[0265] Optionally, the communication device 1400 may further include a storage unit 1430, which may be used to store instructions or data. The processing unit 1410 may execute the instructions or data stored in the storage unit to enable the communication device to perform corresponding operations.

[0266] It should also be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method, and for the sake of brevity, it will not be repeated here.

[0267] In another possible design, the communication device 1400 may correspond to the network device in the above method. When the communication device 1400 corresponds to the network device, the communication device 1400 may be a communication device, or the communication device 1400 may be configured in (or used for) a chip in the communication device, or other devices, modules, circuits or units that can implement the method of the network device.

[0268] It should be understood that the communication device 1400 may include units for executing the method executed by the network device in the above method embodiment. In addition, the units in the communication device 1400 and the above other operations and / or functions are respectively for implementing the corresponding processes in the above method embodiment.

[0269] Optionally, the communication device 1400 may further include a processing unit 1410 , which may be configured to process instructions or data to implement corresponding operations.

[0270] It should also be understood that when the communication device 1400 is a chip configured in (or used in) a network device, the transceiver unit 1420 in the communication device 1400 can be the input / output interface or circuit of the chip, and the processing unit 1410 in the communication device 1400 can be the processor in the chip.

[0271] Optionally, the communication device 1400 may further include a storage unit 1430, which may be used to store instructions or data. The processing unit 1410 may execute the instructions or data stored in the storage unit to enable the communication device to perform corresponding operations.

[0272] It should be understood that the transceiver unit 1420 in the communication device 1400 can be implemented through a communication interface (such as a transceiver, a transceiver circuit, an input / output interface, or a pin, etc.), for example, corresponding to Figure 15 The processing unit 1410 in the communication device 1400 may be implemented by at least one processor, for example, corresponding to Figure 15 The processor 1510 in the communication device 1500 shown in FIG. The processing unit 1410 in the communication device 1400 may also be implemented by at least one logic circuit. The storage unit 1430 in the communication device 1400 may correspond to Figure 15 Memory 1530 in the communication device 1500 shown in FIG.

[0273] Figure 15 1 is a schematic diagram of the structure of the communication device 1500 provided in the embodiment of the present application. Figure 15 As shown, the communication device 1500 includes one or more processors 1510. The processor 1510 can be used for internal processing of the device to implement certain control processing functions. Optionally, the processor 1510 includes instructions 1511. Optionally, the processor 1510 can store data.

[0274] Optionally, the communication device 1500 includes one or more memories 1530 for storing instructions 1531. Optionally, data may also be stored in the memories 1530. The processor and memory may be provided separately or integrated together.

[0275] Optionally, the communication device 1500 may further include a transceiver 1520 and / or an antenna 1540. The transceiver 1520 may be used to send information to or receive information from other devices. The transceiver 1520 may be referred to as a transceiver, a transceiver circuit, an input / output interface, etc., and is used to implement the transceiver functions of the communication device 1500 via the antenna 1540. Optionally, the transceiver 1520 includes a transmitter and a receiver.

[0276] The communication device 1500 can be used for example Figure 1In the communication device of the system shown, the communication apparatus 1500 may correspond to a terminal device or a network device, and the communication apparatus 1500 may be the communication device itself. Alternatively, the communication apparatus 1500 may be configured in the communication device, such as a chip or module configured in the communication device. The communication apparatus 1500 may perform the operations of the terminal device or the network device in the above-described method embodiments.

[0277] In this application, the processor can be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and can implement or execute the various methods, steps, and logic block diagrams of this application. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method in conjunction with this application can be directly implemented as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in the processor.

[0278] In this application, the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or a volatile memory, such as a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory in this application may also be a circuit or any other device that can implement a storage function, for storing program instructions and / or data.

[0279] The present application also provides a processing device, including a processor and a (communication) interface; the processor is used to execute the method provided by the above method embodiment.

[0280] It should be understood that the above-mentioned processing device may be one or more chips. For example, the processing device may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0281] The present application also provides a computer-readable storage medium, which stores a computer program or instruction. When the computer program or instruction is executed, the method performed by the terminal device or network device in the above-mentioned method embodiment is implemented. In this way, the functions described in the above embodiments can be implemented in the form of software functional units and sold or used as independent products. Based on this understanding, the technical solution of the present application can be essentially or in other words, the part that contributes or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory RAM, a magnetic disk or an optical disk.

[0282] According to the method provided by the present application, the present application also provides a computer program product, which includes: computer program code, when the computer program code is executed by one or more processors, the device including the processor executes Figure 4 、 Figure 8 、 Figure 9 The method shown.

[0283] The technical solution provided in this application can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in this application is generated in whole or in part. The above-mentioned computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (DVD)), or a semiconductor medium, etc.

[0284] According to the method provided by the present application, the present application also provides a system, which includes one or more terminal devices mentioned above. The system may further include at least one network device mentioned above.

[0285] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the devices described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the coupling or direct coupling or communication connection between each other shown or discussed can be through some interface, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0286] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A paging method, characterized in that: include: The terminal device determines, based on a first location area where the terminal device is currently located and a first correspondence, a first paging detection opportunity resource, wherein multiple location areas in the first correspondence correspond to multiple paging detection opportunity resources, and the first location area corresponds to the first paging detection opportunity resource in the first correspondence; The terminal device detects downlink control information from a network device on the first paging detection opportunity resource, where the downlink control information is used to schedule a paging message.

2. The method according to claim 1, characterized in that The method further comprises: The terminal device receives first information from the network device, where the first information is used to indicate the first corresponding relationship.

3. The method according to claim 2, characterized in that The terminal device receives first information from the network device, including: The terminal device receives a first synchronization signal block; The terminal device receives a system information block from the network device based on the first synchronization signal block, where the system information block includes the first information.

4. The method according to any one of claims 1 to 3, characterized in that The method further comprises: The terminal device moves from the first location area to the second location area; The terminal device determines, according to the second location area and the first correspondence, a second paging detection opportunity resource corresponding to the second location area; The terminal device detects downlink control information used to schedule paging messages in the second paging detection opportunity resources.

5. The method according to claim 4, characterized in that The method further comprises: The terminal device sends second information to the network device, where the second information is used to indicate the location to which the terminal device has moved, or is used to indicate the second location area. The location to which the terminal device moves belongs to the second location area.

6. The method according to any one of claims 1 to 3 and 5, characterized in that The multiple paging detection opportunity resources are paging detection opportunity resources in multiple resource groups. The interval between two temporally adjacent resource groups is a first time interval, and the first time interval is configured by the network device.

7. The method according to claim 6, characterized in that The multiple resource groups include a first resource group and a second resource group that are adjacent in time, and the first time interval between the first resource group and the second resource group includes a synchronization signal block group, and the M synchronization signal blocks in the synchronization signal block group correspond one-to-one to the M paging detection opportunity resources in the first resource group, or the M synchronization signal blocks in the synchronization signal block group correspond one-to-one to the M paging detection opportunity resources in the second resource group.

8. The method according to any one of claims 1 to 3, 5 and 7, characterized in that The plurality of paging opportunity resources are paging opportunity resources within a paging cycle, and the method further includes: The terminal device receives third information from the network device, where the third information is used to indicate a first offset, where the first offset is the offset between the starting position of the paging cycle and the system frame with frame number 0, and the first offset is greater than the frame length of the system frame.

9. A paging method, characterized in that: include: The network device determines, based on a first location area where the terminal device is currently located and a first correspondence, a first paging detection opportunity resource, wherein multiple location areas in the first correspondence correspond to multiple paging detection opportunity resources, and the first location area corresponds to the first paging detection opportunity resource in the first correspondence; The network device sends downlink control information to the terminal device on the first paging detection opportunity resource, where the downlink control information is used to schedule a paging message.

10. The method according to claim 9, characterized in that The method further comprises: The network device sends first information to the terminal device, where the first information is used to indicate the first corresponding relationship.

11. The method according to claim 10, characterized in that The network device sending first information to the terminal device includes: The network device sends a system information block to the terminal device, where the system information block includes the first information.

12. The method according to any one of claims 9 to 11, characterized in that The method further comprises: The network device determines that the terminal device moves from the first location area to the second location area; The network device determines, according to the second location area and the first correspondence, a second paging detection opportunity resource corresponding to the second location area; The network device detects downlink control information for scheduling a paging message in the second paging detection opportunity resource.

13. The method according to claim 12, characterized in that The network device determining that the terminal device moves from the first location area to the second location area includes: The network device receives second information from the terminal device, where the second information is used to indicate a location to which the terminal device has moved, or is used to indicate the second location area, wherein the location to which the terminal device has moved belongs to the second location area; The network device determines, based on the second information, that the terminal device moves from the first location area to the second location area.

14. The method according to any one of claims 9 to 11 and 13, characterized in that The multiple paging detection opportunity resources are paging detection opportunity resources in multiple resource groups. The interval between two temporally adjacent resource groups is a first time interval, and the first time interval is configured by the network device.

15. The method according to claim 14, characterized in that The multiple resource groups include a first resource group and a second resource group that are adjacent in time, and the first time interval between the first resource group and the second resource group includes a synchronization signal block group, and the M synchronization signal blocks in the synchronization signal block group correspond one-to-one to the M paging detection opportunity resources in the first resource group, or the M synchronization signal blocks in the synchronization signal block group correspond one-to-one to the M paging detection opportunity resources in the second resource group.

16. The method according to any one of claims 9 to 11, 13 and 15, characterized in that The plurality of paging opportunity resources are paging opportunity resources within a paging cycle, and the method further includes: The network device sends third information to the terminal device, where the third information is used to indicate a first offset, where the first offset is the offset between the starting position of the paging cycle and the system frame with frame number 0, and the first offset is greater than the frame length of the system frame.

17. A paging method, characterized in that: include: The terminal device determines a first paging detection opportunity resource according to the first synchronization signal block and the second correspondence, wherein the first synchronization signal block is used for time and frequency synchronization between the terminal device and the network device, multiple synchronization signal blocks in the second correspondence correspond to multiple paging detection opportunity resources, and the first synchronization signal block corresponds to the first paging detection opportunity resource in the second correspondence; The terminal device detects downlink control information on the first paging detection opportunity resource, where the downlink control information is used to schedule a paging message; The method further comprises: The terminal device moves from a first location area to a second location area, where the first location area is a location area corresponding to the first synchronization signal block; The terminal device determines a second paging detection opportunity resource according to the second synchronization signal block corresponding to the second location area and the second correspondence; The terminal device detects downlink control information used to schedule paging messages in the second paging detection opportunity resources.

18. The method according to claim 17, characterized in that The method further comprises: The terminal device receives fourth information from the network device, where the fourth information is used to indicate the second corresponding relationship.

19. The method according to claim 18, characterized in that The terminal device receives fourth information from the network device, including: The terminal device receives the first synchronization signal block; The terminal device receives a system information block from the network device based on the first synchronization signal block, where the system information block includes the fourth information.

20. The method according to claim 17, wherein The method further comprises: The terminal device receives the second synchronization signal block in the second location area, and determines that the second location area corresponds to the second synchronization signal block; or The terminal device determines the second synchronization signal block corresponding to the second location area in the third correspondence based on the third correspondence, wherein the third correspondence is a correspondence between multiple synchronization signal blocks and multiple location areas.

21. The method according to claim 20, characterized in that The method further comprises: The terminal device sends fifth information to the network device, where the fifth information is used to indicate one or more of the following: the second synchronization signal block, the location to which the terminal device moves, or the second location area, The location to which the terminal device moves belongs to the second location area.

22. A paging method, characterized in that: include: The network device determines, according to the first synchronization signal block and the second correspondence, a first paging detection opportunity resource, wherein the plurality of synchronization signal blocks in the second correspondence correspond to the plurality of paging detection opportunity resources, and the first synchronization signal block corresponds to the first paging detection opportunity resource in the second correspondence; The network device sends downlink control information to the terminal device on the first paging detection opportunity resource, where the downlink control information is used to schedule a paging message, and the terminal device is a terminal device that is time-frequency synchronized with the network device according to the first synchronization signal block; The method further comprises: The network device determines a second paging detection opportunity according to a second synchronization signal block and the second correspondence, where the second synchronization signal block is a synchronization signal block corresponding to the position to which the terminal device moves; The network device sends downlink control information for scheduling a paging message to the terminal device in the second paging detection opportunity resource.

23. The method according to claim 22, characterized in that The method further comprises: The network device sends fourth information to the terminal device, where the fourth information is used to indicate the second corresponding relationship.

24. The method according to claim 23, wherein The network device sending fourth information to the terminal device includes: The network device sends a system information block to the terminal device, where the system information block includes the fourth information.

25. The method according to claim 22, wherein The method further comprises: The network device determines that the terminal device moves from a first location area to a second location area, where the first location area is a location area corresponding to the first synchronization signal block; The network device determines the second synchronization signal block corresponding to the second location area in the third correspondence based on the third correspondence, wherein the third correspondence is a correspondence between multiple synchronization signal blocks and multiple location areas.

26. The method according to claim 25, characterized in that The method further comprises: The network device receives fifth information from the terminal device, where the fifth information is used to indicate one or more of the following: the second synchronization signal block, the location to which the terminal device moves, or the second location area, The location to which the terminal device moves belongs to the second location area.

27. A communication device, characterized in that: comprising at least one processor coupled to a memory; The memory is used to store programs or instructions; The at least one processor is configured to execute the program or instructions so as to enable the apparatus to implement the method according to any one of claims 1 to 26.

28. A computer-readable storage medium, characterized in that Instructions are stored, and when the instructions are executed on a computer, the computer is caused to perform the method according to any one of claims 1 to 26.

29. A computer program product, characterized in that Instructions are stored, and when the instructions are executed on a computer, the computer is caused to perform the method according to any one of claims 1 to 26.

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