Communication method, and apparatus

Abstract

Provided in the present application are a communication method and an apparatus, which can solve the problem of access failure caused when a terminal tries to access a current cell, so as to reduce the impact of access failure on a terminal service as much as possible. The present application can be applied to a 4G system, a 5G system, and a future communication system, such as a 6G system. The method comprises: receiving first information; and, according to the first information, executing camp determination by means of a main radio (MR) and / or a low-power radio (LR), the camp determination comprising: determining whether the terminal can camp on or access a first cell, and / or determining whether the capability of the terminal conforms to a configuration of the first cell.

Description

Communication method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on June 30, 2023, with application number 202310809909.0 and application name “Communication Method and Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and in particular to a communication method and device. Background Art

[0003] Currently, a terminal in a radio resource control (RRC) idle state (RRC_IDLE) or an RRC inactive state (RRC_INACTIVE) can periodically monitor paging of the cell in which it resides.

[0004] To reduce terminal power consumption, the industry has introduced the low power wake-up signal (LP-WUS) mechanism. Using this mechanism, terminals can use their internal low power receiver (LP-WUR / LR) to handle some tasks, while their main circuit / main link (MR) handles other tasks. For example, when there is no data or service, the MR can remain off or enter a sleep state, reducing the UE's standby power consumption.

[0005] Currently, terminals can move between cells. When a terminal moves into the coverage area of ​​a cell and needs to access the cell, it can wake up the Mobile Relay Manager (MR) and attempt to access the current cell through the MR. In some cases, access to the current cell may fail, impacting the terminal's services.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a communication method and apparatus that can solve the problem of a terminal attempting to access a current cell but resulting in access failure, thereby minimizing the impact of the access failure on the terminal's services.

[0008] To achieve the above objectives, this application adopts the following technical solutions:

[0009] In a first aspect, a communication method is provided that can be applied to a terminal or a component capable of supporting terminal functions (such as a chip system). Taking application in a terminal as an example, the communication method includes: receiving first information and, based on the first information, performing a residency determination via a main circuit MR and / or a low-power circuit LR; the residency determination includes: determining whether the terminal can reside in or access a first cell, and / or determining whether the terminal's capabilities meet the configuration of the first cell.

[0010] Compared to the related art, when the terminal moves within a certain area (such as area A shown in Figure 3), the terminal or MR may not perceive the change of the cell, and the terminal may reside in a cell that cannot be resided, affecting the terminal's service. In the present application, when the terminal moves within a certain area, the MR and / or LR can perform a residency determination, so that the terminal can promptly determine whether the current cell can be accessed or resided, and select a suitable cell for residency or access in a timely manner based on the result of the residency determination, thereby avoiding the terminal trying to enter the connected state in an inappropriate cell and failing, and reducing the probability of terminal service interruption or delay.

[0011] In one possible design, the method also includes: if a first condition is met, residing in or accessing the first cell; the first condition includes at least one of the following conditions: the first cell can be resided by the terminal, the first cell can be accessed by the terminal, and the capability of the terminal is consistent with the configuration of the first cell.

[0012] It can be understood that if the terminal determines that the first condition is met through the residence determination, it means that the terminal can normally reside or access the first cell, or the terminal has a high probability of successfully residing or accessing the first cell, which can be regarded as the residence determination of the first cell being passed, and the terminal resides or accesses the first cell.

[0013] In one possible design, the method also includes: if a second condition is met, performing cell reselection; the second condition includes at least one of the following conditions: the first cell cannot be resided by the terminal, the first cell cannot be accessed by the terminal, and the capability of the terminal does not comply with the configuration of the first cell.

[0014] In one possible design, it also includes: accessing a second cell, where the second cell is the cell determined for performing cell reselection.

[0015] In this way, when the terminal cannot reside in or access the first cell, the terminal can select a second cell that can reside or access through cell reselection to meet the terminal's residency or access requirements and reduce the probability of terminal service interruption or failure.

[0016] In one possible design, accessing the second cell includes: if the terminal is in an inactivated state and the second cell belongs to the notification area RNA based on the wireless access network of the terminal, sending a wireless resource control RRC recovery request message to the second cell, and the RRC recovery request message is used to restore the connection with the second cell; or, if the terminal is in an inactivated state and the second cell does not belong to the RNA of the terminal, sending an RRC establishment request message to the second cell, and the RRC establishment request message is used to request to establish a connection with the second cell; or, if the terminal is in an idle state, sending an RRC establishment request message to the second cell, and the RRC establishment request message is used to request to establish a connection with the second cell.

[0017] In this way, when the terminal is unable to reside in or access the first cell, the terminal can select a second cell that it can reside in or access through cell reselection to meet the terminal's residency or access needs, reducing the probability of terminal service interruption or failure. In addition, for a terminal in an RRC inactive state, when the terminal selects another cell, the terminal can determine whether the cell belongs to its RNA, so that the terminal can determine whether it should subsequently perform RRC connection recovery or RRC connection establishment. This can ensure that the inactive terminal initiates the correct connection process for different types of cells, thereby improving the success rate of the connection.

[0018] In one possible design, accessing the first cell includes: if the terminal is in an inactivated state and the first cell belongs to the notification area RNA based on the wireless access network of the terminal, sending a wireless resource control RRC recovery request message to the first cell, and the RRC recovery request message is used to restore the connection with the first cell; or, if the terminal is in an inactivated state and the first cell does not belong to the RNA of the terminal, sending an RRC establishment request message to the first cell, and the RRC establishment request message is used to request to establish a connection with the first cell; or, if the terminal is in an idle state, sending an RRC establishment request message to the first cell, and the RRC establishment request message is used to request to establish a connection with the first cell.

[0019] In this application, the terminal can restore or establish a connection with the first cell according to its own state and / or whether the first cell is located in the RNA, which can ensure that the terminal initiates the correct connection establishment or recovery process and improve the success rate of the connection.

[0020] In one possible design, performing a residency determination by the main circuit MR or the low power circuit LR according to the first information includes:

[0021] A residency decision is performed by the MR according to the first information.

[0022] In an embodiment of the present application, when the terminal moves within a certain area, a residence determination can be performed through the MR, which can improve the efficiency of the residence determination, facilitate the terminal to promptly determine whether the current cell can be accessed or resided, and promptly select a suitable cell for residency or access based on the result of the residence determination, thereby avoiding the terminal trying to enter a connected state in an inappropriate cell and failing, and reducing the probability of terminal service interruption or delay.

[0023] In one possible design, the method also includes: determining cell change information through the LR; the cell change information includes at least one of the following information: information on whether the cell has changed, information on the currently resided cell, and information on the cell resided or accessed; sending the cell change information to the MR through the LR; performing a residency decision based on the first information through the MR, including: performing a residency decision based on the first information through the MR according to the cell change information.

[0024] In this way, the terminal records the information of the cell it has recently moved to through the LR. In this way, during the movement of the terminal, the terminal can learn the cell it has recently moved to based on the above information, so as to perform the residency decision on the new cell in a timely and efficient manner, reducing the probability of terminal service interruption.

[0025] In one possible design, performing a residence determination according to the first information by the MR includes: if a third condition is met, performing a residence determination according to the first information by the MR; the third condition includes at least one of the following conditions: the terminal has not performed a residence determination on the first cell, the time interval between the last time the terminal performed a residence determination on the first cell exceeds a threshold, and the terminal leaves the first cell after performing a residence determination on the first cell.

[0026] Since the parameters of the cell may change, if the time interval between the last time the terminal performed a residence determination on the first cell exceeds a threshold, or the terminal leaves the first cell after performing a residence determination on the first cell, in order to avoid the impact of the parameter change of the first cell after the last residence determination, the terminal can re-perform the residence determination on the first cell through the MR to improve the accuracy of the residence determination.

[0027] In one possible design, receiving the first information includes: receiving the first information through the LR, the first information including at least one of the following information: cell prohibition indication information, specific same-frequency reselection indication information, half-duplex indication, public land mobile network PLMN information, cell special use indication information, tracking area information, frequency band information, spectrum emission requirement information, carrier bandwidth, bandwidth part BWP information, frequency offset indication information; performing a residency decision through the main circuit MR or the low power consumption circuit LR according to the first information, including: performing a residency decision through the LR according to the first information.

[0028] In the present application, the terminal can perform the residency determination through the LR without specifically turning on the MR to perform the residency determination, thereby reducing the unnecessary MR turning-on frequency and thus reducing the extra power consumption.

[0029] In one possible design, performing cell reselection includes: performing cell reselection through the MR, or performing cell reselection through the LR.

[0030] In one possible design, based on the first information, a residency decision is performed through the main circuit MR and the low-power circuit LR, including: performing a residency decision through the LR based on the second information; performing a residency decision through the MR based on third information; or, performing a residency decision through the MR based on the second information; performing a residency decision through the LR based on the third information; wherein the second information is part of the first information, and the third information includes information in the first information other than the second information.

[0031] Optionally, if the LR has performed a residency determination based on the second information in the first information, then when it is necessary to enter the connected state, the MR may perform a residency determination based on at least one piece of information in the first information other than the second information. That is to say, the third information may only include information in the first information other than the second information, and the MR no longer performs a residency determination based on the second information. For example, the MR performs a residency determination based on the information corresponding to index 7-11 shown in Table 1-2, and no longer performs a residency determination based on the information corresponding to index 1-6. For another example, the MR performs a residency determination based on the information corresponding to index 7-9 shown in Table 1-2. In this way, the complexity and computational complexity of the MR's residency determination can be reduced, and the efficiency of the residency determination can be improved.

[0032] Alternatively, the MR may perform a residency determination based on at least one piece of information in the first information other than the second information, as well as at least a portion of the second information. For example, the MR may perform a residency determination based on the information corresponding to indexes 7-11 and indexes 1-3 shown in Table 1-2. In this way, the MR can incorporate more information to perform a residency determination, thereby improving the accuracy of the residency determination result.

[0033] In one possible design, the second information includes at least one item of information: cell prohibition indication information, specific same-frequency reselection indication information, half-duplex indication, public land mobile network PLMN information, cell special use indication information, and tracking area information; the third information includes at least one item of the following information: frequency band information, spectrum emission requirement information, carrier bandwidth, bandwidth part BWP information, and frequency offset indication information.

[0034] In one possible design, residing in or accessing the first cell includes: residing in or accessing the first cell through the MR. In this way, the MR can efficiently reside in or access the first cell, reducing the impact on terminal services.

[0035] In one possible design, accessing the second cell includes: accessing the second cell through the MR.

[0036] In a possible design, it also includes: waking up the MR; performing a residency determination through the MR based on the first information, including: performing a residency determination through the awakened MR based on the first information.

[0037] In a possible design, it also includes: receiving a wake-up signal, where the wake-up signal is used to page the terminal; and waking up the MR, including: waking up the MR according to the wake-up signal.

[0038] In one possible design, waking up the MR includes: waking up the MR when data transmission is performed or a service is executed.

[0039] In an embodiment of the present application, the MR can determine whether it is necessary to perform a residency determination before entering the connected state in response to the wake-up condition (such as receiving a wake-up signal or transmitting data) based on the cell change information from the LR, so that the terminal can respond more accurately and avoid unnecessary operations that bring additional complexity and delay. It can be seen that for the terminal of the LP-WUS mechanism, the MR will be awakened by the terminal responding to the wake-up signal or data transmission requirements, and the MR will perform the residency determination, which can enable the terminal to determine whether to enter the connected state in the current cell or select another cell to enter the connected state, thereby avoiding the connection failure or connection delay caused by the terminal directly attempting to enter the connected state in the current cell.

[0040] In one possible design, performing cell reselection includes: if any one or more of the following information satisfies a second condition: cell prohibition indication information, specific same-frequency reselection indication information, half-duplex indication, public land mobile network (PLMN) information, cell special use indication information, and tracking area information, then performing cell reselection after determining to reside. Thus, if the one or more information of the current cell satisfies the second condition, the terminal determines that the current cell is unlikely to send a paging message to the terminal, and the terminal may not be able to receive a paging message if it continues to reside in the current cell. Therefore, the terminal can promptly change to another cell to reside in so that it can be paged normally by the network side.

[0041] Alternatively, if any one or more of the frequency band information, spectrum emission requirement information, carrier bandwidth, bandwidth portion BWP information, and frequency offset indication information satisfies the second condition, then after receiving a paging call for the terminal, or when performing data transmission, or when executing a service, cell reselection is performed. It can be understood that if the one or more information of the current cell satisfies the second condition, it means that it may not affect the terminal's reception of paging in the current cell, but the terminal is likely to be unable to access the current cell or enter a connected state on the current cell. Therefore, the terminal can reselect the cell when it needs to enter a connected state later. If the terminal does not need to enter a connected state, it can temporarily monitor paging in the current cell. In this way, if it is determined that it does not affect the terminal's reception of paging in the current cell, cell reselection may not be performed if the terminal does not enter a connected state, thereby reducing the power consumption of the terminal.

[0042] The second condition includes at least one of the following conditions: the first cell cannot be camped by the terminal, the first cell cannot be accessed by the terminal, and the capability of the terminal does not comply with the configuration of the first cell.

[0043] In one possible design, the residency determination is performed by the main circuit MR and / or the low-power circuit LR, including: periodically waking up the MR and performing the residency determination by the MR; or waking up the MR by an event trigger and performing the residency determination by the MR; the event includes at least one of the following: data to be transmitted, measurement to be performed, service to be performed, received wake-up signal, reference signal quality below a threshold, wake-up signal decoding failure, reference signal decoding failure, system information update indication, earthquake and tsunami warning ETWS, commercial mobile alert CMAS.

[0044] In this application, the terminal of the LP-WUS mechanism can periodically or event-triggeredly wake up the MR and perform a residency decision through the MR, so that when the terminal cannot reside in or access the current cell, it can select another cell that can be resided or accessed. On the one hand, it can prevent the terminal from residing in a cell that does not send a paging message to the terminal, resulting in the terminal being unable to be paged. On the other hand, it can prevent the terminal from directly attempting to enter the connected state in an inaccessible cell, resulting in the inability to establish or restore the connection, affecting the service performance of the terminal.

[0045] In a possible design, it also includes: if the first condition is met, the MR is turned off or switched to a sleep state; the first condition includes at least one of the following conditions: the second cell can be resided by the terminal, the second cell can be accessed by the terminal, and the capability of the terminal is consistent with the configuration of the second cell.

[0046] If the first condition is met, it means that the camping determination is passed, and the terminal can continue to camp on the current first cell. In addition, the terminal can turn off the MR or switch the MR to a sleep state to reduce the power consumption of the terminal.

[0047] In a possible design, it also includes: if the second condition is met, performing cell reselection through the MR; turning off the MR or switching the MR to a sleep state; the second condition includes at least one of the following conditions: the second cell cannot be resided by the terminal, the second cell cannot be accessed by the terminal, and the capability of the terminal does not comply with the configuration of the second cell.

[0048] If the second condition is met, meaning the stay determination fails and the terminal cannot continue to stay in the current first cell, the terminal can search for other suitable cells for stay or access through the MR, such as reselecting to the second cell. In this method, the terminal can perform cell reselection through the MR. After the terminal performs the stay determination through the MR, if the MR determines that the stay determination fails, the terminal first performs cell reselection through the MR, and then shuts down the MR or puts it into a sleep state. This minimizes unnecessary MR wakeup time and reduces additional power consumption.

[0049] In a possible design, it also includes: if the second condition is met, turning off the MR or switching the MR to a sleep state; performing cell reselection through the LR; the second condition includes at least one of the following conditions: the second cell cannot be resided by the terminal, the second cell cannot be accessed by the terminal, and the capability of the terminal does not comply with the configuration of the second cell.

[0050] In this method, the terminal performs cell reselection via the LR. The terminal can then perform a residency determination on the MR. If the MR determines that the residency determination has failed, the terminal can shut down the MR or put it into a sleep state. In other words, after the terminal performs a residency determination on the MR, if the MR determines that the residency determination has failed, the terminal can directly shut down the MR or put it into a sleep state, and then perform cell reselection via the LR. This eliminates the need to wait for cell reselection before shutting down or putting the MR into a sleep state, thereby reducing terminal power consumption.

[0051] In a second aspect, a communication device is provided, which can be applied to a terminal or a component capable of supporting terminal functions (such as a chip system). Taking application in a terminal as an example, the device includes: a transceiver module for receiving first information, where the first information is used for a residency determination; a processing module for performing a residency determination based on the first information via a main circuit MR and / or a low-power circuit LR; the residency determination includes determining whether the terminal can reside in or access a first cell, and / or determining whether the terminal's capabilities meet the configuration of the first cell.

[0052] In one possible design, the MR may integrate some of the functions of the transceiver module and some of the functions of the processing module. The LR may integrate some of the functions of the transceiver module and some of the functions of the processing module. In this application, references to "a processing module configured to perform an operation" may, unless otherwise specified, refer to the processing module in the MR performing the operation, the processing module in the LR performing the operation, or another processing module in the terminal performing the operation.

[0053] In one possible design, the processing module is also used to: reside in or access the first cell if a first condition is met; the first condition includes at least one of the following conditions: the first cell can be resided by the terminal, the first cell can be accessed by the terminal, and the capability of the terminal is consistent with the configuration of the first cell.

[0054] In one possible design, the processing module is also used to: perform cell reselection if a second condition is met; the second condition includes at least one of the following conditions: the first cell cannot be resided by the terminal, the first cell cannot be accessed by the terminal, and the capability of the terminal does not comply with the configuration of the first cell.

[0055] In one possible design, the processing module is further used to: access a second cell, where the second cell is the cell determined to perform cell reselection.

[0056] In one possible design, accessing the second cell includes: if the terminal is in an inactivated state and the second cell belongs to the notification area RNA based on the wireless access network of the terminal, sending a wireless resource control RRC recovery request message to the second cell, and the RRC recovery request message is used to restore the connection with the second cell; or, if the terminal is in an inactivated state and the second cell does not belong to the RNA of the terminal, sending an RRC establishment request message to the second cell, and the RRC establishment request message is used to request to establish a connection with the second cell; or, if the terminal is in an idle state, sending an RRC establishment request message to the second cell, and the RRC establishment request message is used to request to establish a connection with the second cell.

[0057] In one possible design, accessing the first cell includes: if the terminal is in an inactivated state and the first cell belongs to the notification area RNA based on the wireless access network of the terminal, sending a wireless resource control RRC recovery request message to the first cell, and the RRC recovery request message is used to restore the connection with the first cell; or, if the terminal is in an inactivated state and the first cell does not belong to the RNA of the terminal, sending an RRC establishment request message to the first cell, and the RRC establishment request message is used to request to establish a connection with the first cell; or, if the terminal is in an idle state, sending an RRC establishment request message to the first cell, and the RRC establishment request message is used to request to establish a connection with the first cell.

[0058] In one possible design, performing a residency decision according to the first information by the main circuit MR or the low power circuit LR includes: performing a residency decision according to the first information by the MR.

[0059] In one possible design, the LR includes a processing module, and the processing module in the LR is used to determine cell change information; the cell change information includes at least one of the following information: information on whether the cell has changed, information on the currently resident cell, and information on the cell resident or accessed; the LR also includes a transceiver module, and the transceiver module in the LR is used to send the cell change information to the MR; performing a residency determination according to the first information by the MR includes: performing a residency determination according to the first information by the MR based on the cell change information.

[0060] In one possible design, performing a residence determination according to the first information by the MR includes: if a third condition is met, performing a residence determination according to the first information by the MR; the third condition includes at least one of the following conditions: the terminal has not performed a residence determination on the first cell, the time interval between the last time the terminal performed a residence determination on the first cell exceeds a threshold, and the terminal leaves the first cell after performing a residence determination on the first cell.

[0061] In one possible design, receiving the first information includes: receiving the first information through the LR, the first information including at least one of the following information: cell prohibition indication information, specific same-frequency reselection indication information, half-duplex indication, public land mobile network PLMN information, cell special use indication information, tracking area information, frequency band information, spectrum emission requirement information, carrier bandwidth, bandwidth part BWP information, frequency offset indication information; performing a residency decision through the main circuit MR or the low power consumption circuit LR according to the first information, including: performing a residency decision through the LR according to the first information.

[0062] In one possible design, performing cell reselection includes: performing cell reselection through the MR, or performing cell reselection through the LR.

[0063] In one possible design, based on the first information, a residency decision is performed through the main circuit MR and the low-power circuit LR, including: performing a residency decision through the LR based on the second information; performing a residency decision through the MR based on third information; or, performing a residency decision through the MR based on the second information; performing a residency decision through the LR based on the third information; wherein the second information is part of the first information, and the third information includes information in the first information other than the second information.

[0064] In one possible design, the second information includes at least one item of information: cell prohibition indication information, specific same-frequency reselection indication information, half-duplex indication, public land mobile network PLMN information, cell special use indication information, and tracking area information; the third information includes at least one item of the following information: frequency band information, spectrum emission requirement information, carrier bandwidth, bandwidth part BWP information, and frequency offset indication information.

[0065] In one possible design, the MR includes a processing module, and the processing module is used to reside in or access the first cell, including: the processing module in the MR is used to reside in or access the first cell.

[0066] In one possible design, accessing the second cell includes: accessing the second cell through the MR.

[0067] In one possible design, the processing module is further used to: wake up the MR; and perform a residency determination through the MR based on the first information, including: performing a residency determination through the woken MR based on the first information.

[0068] The processing module for waking up the MR may be a processing module in the terminal LR, or may be other processing modules in the terminal, and this application does not impose any limitation on this.

[0069] In one possible design, the transceiver module is further used to: receive a wake-up signal, where the wake-up signal is used to page the terminal; and wake up the MR, including: waking up the MR according to the wake-up signal.

[0070] In one possible design, waking up the MR includes: waking up the MR when data transmission is performed or a service is executed.

[0071] In one possible design, cell reselection is performed, including: if the second condition is met according to any one or more of the cell prohibition indication information, specific same-frequency reselection indication information, half-duplex indication, public land mobile network PLMN information, cell special use indication information, and tracking area information, then cell reselection is performed after the residence determination; or, if the second condition is met according to any one or more of the frequency band information, spectrum emission requirement information, carrier bandwidth, bandwidth part BWP information, and frequency offset indication information, then cell reselection is performed after receiving a paging call for the terminal, or when transmitting data, or when executing a service; the second condition includes at least one of the following conditions: the first cell cannot be resided by the terminal, the first cell cannot be accessed by the terminal, and the capability of the terminal does not comply with the configuration of the first cell.

[0072] In one possible design, the residency determination is performed by the main circuit MR and / or the low-power circuit LR, including: periodically waking up the MR and performing the residency determination by the MR; or waking up the MR by an event trigger and performing the residency determination by the MR; the event includes at least one of the following: data to be transmitted, measurement to be performed, service to be performed, received wake-up signal, reference signal quality below a threshold, wake-up signal decoding failure, reference signal decoding failure, system information update indication, earthquake and tsunami warning ETWS, commercial mobile alert CMAS.

[0073] In one possible design, the processing module is also used to: if a first condition is met, turn off the MR or switch the MR to a sleep state; the first condition includes at least one of the following conditions: the second cell can be resided by the terminal, the second cell can be accessed by the terminal, and the capability of the terminal is consistent with the configuration of the second cell.

[0074] In one possible design, the processing module in the MR is further configured to: perform cell reselection if the second condition is met; and the processing module is further configured to shut down the MR or switch the MR to a sleep state. The processing module configured to shut down the MR may be a processing module in the MR or another processing module, such as a processing module in the LR.

[0075] The second condition includes at least one of the following conditions: the second cell cannot be camped by the terminal, the second cell cannot be accessed by the terminal, and the capability of the terminal does not comply with the configuration of the second cell.

[0076] In one possible design, the processing module is further used to: if a second condition is met, shut down the MR or switch the MR to a sleep state; the processing module in the LR is also used to perform cell reselection; the second condition includes at least one of the following conditions: the second cell cannot be resided by the terminal, the second cell cannot be accessed by the terminal, and the capability of the terminal does not comply with the configuration of the second cell.

[0077] It should be noted that the transceiver module described in the second aspect may include a receiving module and a transmitting module. The receiving module is used to receive data and / or signaling from a terminal device; the transmitting module is used to transmit data and / or signaling to the terminal device. This application does not specifically limit the specific implementation of the transceiver module.

[0078] Optionally, the communication device described in the second aspect may further include a storage module, wherein the storage module stores a program or instruction. When the processing module executes the program or instruction, the communication device described in the second aspect may execute the method described in the first aspect.

[0079] In a third aspect, a communication device is provided, comprising: a processor configured to execute the communication method as described in any possible implementation manner of the first aspect.

[0080] Optionally, the communication device may further include a memory, the processor is coupled to the memory, and the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory, so that the communication device executes the method described in the first aspect.

[0081] In one possible design, the communication device described in the third aspect may further include a transceiver. The transceiver may be a transceiver circuit or an input / output port. The transceiver may be used for the communication device to communicate with other communication devices.

[0082] In the present application, the communication device described in the third aspect may be a terminal device, or may be a component in the form of a chip or a chip system.

[0083] In a fourth aspect, a communication system is provided, which includes a network device and a terminal device according to any design method of any of the above aspects.

[0084] In a fifth aspect, a computer-readable storage medium is provided, comprising: the computer-readable storage medium includes a computer program or instructions; when the computer program or instructions are run on a computer, the computer executes the communication method described in any possible implementation method of the first aspect.

[0085] In a sixth aspect, a computer program product is provided, comprising a computer program or instructions, which, when executed on a computer, enables the computer to execute the communication method described in any possible implementation of the first aspect.

[0086] In addition, the technical effects of the technical solutions of the second to sixth aspects can refer to the technical effects of the communication method described in any possible implementation method of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] FIG1 is a schematic diagram of a paging mechanism provided in an embodiment of the present application;

[0088] FIG2 is a schematic diagram of a main circuit and a low-power circuit provided in an embodiment of the present application;

[0089] FIG3 is a schematic diagram of a scenario of a communication method provided in an embodiment of the present application;

[0090] FIG4 is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0091] FIG5 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0092] FIG6 is a flow chart of a communication method according to an embodiment of the present application;

[0093] Figures 7 to 9 are schematic diagrams of scenarios of the communication method provided in the embodiments of the present application;

[0094] Figures 10 to 14 are flowcharts of a communication method according to an embodiment of the present application;

[0095] FIG15 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0096] FIG16 is a schematic structural diagram of a chip system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0097] First, the technical terms involved in the embodiments of this application are introduced:

[0098] 1. Paging

[0099] The network can notify a UE in RRC idle state (RRC_IDLE) or RRC inactive state (RRC_INACTIVE) to receive a paging message through paging. Alternatively, the network can send a short message to a UE in RRC idle state, RRC inactive state, or RRC connected state (RRC_CONNECTED) through paging to indicate system information (SI) update or earthquake and tsunami warning system / commercial mobile alert service (ETWS / CMAS).

[0100] The UE can calculate its own paging occasion (PO) based on its UE identification information and paging-related parameters according to the calculation formula specified in the protocol. As shown in Figure 1, a UE in the RRC idle state or RRC inactive state monitors its own PO in each paging cycle to determine whether the network is paging the UE.

[0101] The PO positions calculated by different UEs may be the same or different, and there may be multiple UEs monitoring the same PO.

[0102] During the paging process, the network selects a certain paging range and sends paging downlink control information (DCI) within the PO.

[0103] The paging range is the area where the network sends paging messages. This area can be determined by the network. For example, for a UE in RRC Idle state, the network can use the UE's registration area as the paging range. For another example, for a UE in RRC Inactive state, the network can use the UE's radio access network-based notification area (RNA) as the paging range.

[0104] The paging DCI includes scheduling information of the paging message and / or the short message. The scheduling information of the paging message may include frequency domain resource location information for scheduling the paging message, time domain resource location information for scheduling the paging message, and other scheduling information.

[0105] For example, the contents of the paging DCI are shown in the following table:

[0106] Table 1-1

[0107] In some examples, if the paging DCI contains scheduling information for a paging message (excluding short messages), after the UE receives the paging DCI from the network, it may receive and decode the paging message on the corresponding time domain resources and frequency domain resources of the physical downlink shared channel (PDSCH) according to the scheduling information. If, after decoding the paging message, the UE determines that the paging message does not contain the UE's identifier, which means that the paging message is not a page for itself, the UE ignores the paging message. Conversely, if the paging message contains the UE's identifier, which means that the network is paging the UE, the UE determines subsequent operations based on other content in the paging message.

[0108] In some examples, if the paging DCI contains a short message (excluding the scheduling information of the paging message), after the UE receives the paging DCI from the network, it can receive at least one of the following information according to the instructions of the short message: updated system information, earthquake and tsunami warnings, and commercial mobile alerts.

[0109] In some examples, if the paging DCI includes scheduling information of the paging message and a short message, after the UE receives the paging DCI from the network, it can receive the paging message and at least one of the following information according to the paging DCI: updated system information, earthquake and tsunami warning, and commercial mobile alert.

[0110] 2. Types of paging

[0111] Depending on the network element that triggers the paging, the paging may include CN paging triggered by the core network (CN) and RAN paging triggered by the radio access network (RAN).

[0112] The network can initiate CN paging for UEs in RRC idle state. Correspondingly, UEs in RRC idle state need to monitor CN paging. As a possible implementation method, when the UE receives and decodes a paging message, the UE verifies whether the UE identification information in the paging message matches its own 5G system temporary mobile user identity (5G system-temporary mobile subscription identifier, 5G-S-TMSI). If it matches, the UE initiates a radio resource control (RRC) connection establishment process (RRC setup) to establish an RRC connection with the network.

[0113] CN paging or RAN paging can be initiated for UEs in RRC inactive state. Accordingly, UEs in RRC inactive state need to monitor CN paging and RAN paging. As a possible implementation method, when the UE receives and decodes a paging message, the UE verifies whether the UE identification information in the paging message matches its own 5G-S-TMSI or inactive-radio network temporary identifier (I-RNTI). If the UE identification information in the paging message matches the 5G-S-TMSI of the UE, the UE first enters the RRC idle state and then initiates the RRC connection establishment process to establish an RRC connection with the network. If the UE identification information in the paging message matches the I-RNTI of the UE, the UE initiates the RRC connection recovery process (RRC resume) to restore the RRC connection with the network.

[0114] 3. Wake-up signal (WUS)

[0115] To help UEs save energy, the industry is introducing power-saving signals, of which the wake-up signal (WUS) is a type of power-saving signal. WUS can be of various types, including DCI, physical layer signals, sequences, media access control elements (MAC CEs), and RRC signaling.

[0116] For the paging process, as shown in Figure 1, the network can send a WUS before or on the PO to indicate whether the UE needs to monitor the PO or receive paging messages in the future, so as to avoid the UE from unnecessarily monitoring or receiving the PO or paging messages. For example, if the current network does not page a certain UE, the network can send a WUS before the PO to indicate that the UE does not need to monitor the associated PO, and the UE does not monitor the associated PO according to the WUS. Alternatively, the network may not send a WUS before the PO, and the UE does not detect / receive the WUS, so the UE does not monitor the associated PO.

[0117] One WUS may be associated with one or more POs, that is, the network may instruct the UE to monitor or not monitor one or more POs through one WUS.

[0118] 4. Ultra-low power wake-up signal (LP-WUS)

[0119] In order to achieve lower power consumption, 3GPP currently proposes a low power-wake-up signal (LP-WUS) mechanism.

[0120] In this mechanism, the UE detects and processes WUS through a dedicated receiver for wake-up signals. The dedicated receiver for wake-up signals can be called an ultra-low power receiver (low power-wake up radio, LP-WUR / LR), an ultra-low power module (low power-wake up module), an ultra-low power circuit / ultra-low power link, an auxiliary circuit / auxiliary link, an auxiliary communication module, etc. In the embodiments of the present application, the dedicated receiver for wake-up signals is collectively referred to as LR, but this does not constitute a limitation on the name and implementation of the receiver.

[0121] Compared with MR, LR has a simpler circuit and lower power consumption. After the introduction of LR, when there is no data / service transmission, the main circuit / main link (main radio, MR) of the UE can remain closed or in sleep state to reduce the standby power consumption of the UE. As shown in Figure 2, LR is used to monitor the wake-up signal, and after receiving the wake-up signal, wake up the MR according to the instruction of the wake-up signal to transmit data or services. In the embodiment of the present application, MR can also be referred to as the main communication module, etc., and is called MR in the following description of the embodiment of the present application, but it does not constitute a limitation.

[0122] 5. RRC idle state (RRC_IDLE)

[0123] When the terminal is in the RRC idle state, the terminal device does not retain radio resource control (RRC), context and other information. The RRC context is a parameter for establishing communication between the terminal device and the network device. The RRC context may include security context, terminal device capability information, etc. At the same time, the terminal device has not established a connection with the core network device. Generally speaking, a terminal device in the RRC idle state only wakes up periodically to receive paging messages. In the embodiments of the present application, the UE in the idle state may also be referred to as an idle UE.

[0124] 6. RRC inactive state (RRC_INACTIVE)

[0125] When the terminal device is in the RRC inactive state, the RRC context is retained between the terminal device and the network device. At the same time, the terminal device also establishes a connection with the core network device, that is, the core network device is in CN_CONNECTED (core network connected state). At this time, the process of switching to the connected state for data reception is relatively fast, and no additional core network signaling overhead is generated. In addition, the terminal device in the RRC inactive state will also enter the sleep state. Therefore, the RRC inactive state can meet the requirements of reducing connection delay, reducing signaling overhead and power consumption. In the embodiment of the present application, the UE in the inactive state can also be referred to as an inactive UE.

[0126] 7. RRC connected state (RRC_CONNECTED)

[0127] When the terminal device is in the RRC connected state, the terminal device has established an RRC context. The parameters required to establish communication between the terminal device and the network device have been acquired by both communicating parties. The network device allocates a cell radio network temporary identifier (C-RNTI) to the connected terminal device. At the same time, the terminal device also establishes a connection with the core network device. At this time, if the terminal device is transmitting data, it can be in a continuous reception state until the data transmission is completed and enters a waiting state, and it can switch to a connected state discontinuous reception (DRX) to save power consumption. If there is more data to be transmitted later, the terminal device can return to the continuous reception state again. At this time, since the RRC context has been established, the switching time required for the terminal device to leave the connected state DRX and prepare for continuous reception is much shorter than the time to switch from the RRC idle state to the RRC connected state. In the embodiment of the present application, the UE in the connected state can also be referred to as a connected UE.

[0128] In related technologies, for the LP-WUS mechanism, when a UE moves within a certain range and has no data, services, or other operations, the mobile address relay (MR) can remain powered off or in sleep mode. The mobile address relay (LR) can sense the UE's movement (e.g., cell changes), or it can detect whether the UE leaves the specified range without sensing the UE's movement.

[0129] The above-mentioned certain range may be a tracking area (TA) of the UE, a registration area (registration area), a network configured area (eg, one or more cells designated by the network), RNA, etc. The certain range may be referred to as LR coverage.

[0130] As shown in Figure 3, the LR's coverage area A includes cells 1 to 4. When a UE moves between cells 1 to 4, if there is no data, service, or other operation requiring MR operation, the MR can remain dormant (or powered off), leaving only the LR operational. In this scenario, because the UE or MR are unaware of the cell change, the UE may camp on a cell it cannot camp on, or the MR, after waking up, may attempt to access an inaccessible cell, causing the UE to fail to access the network and impacting UE services.

[0131] For example, for a reduced capability (RedCap) terminal (UE), the cell barring indication information broadcast by a cell for UEs with one receiving channel (1Rx branch) is "barred". If the network side adopts a paging range optimization mechanism, the network side assumes that the RedCap UE of the 1Rx branch will not reside in the cell. Therefore, when paging the UE, the cell does not send a paging message for the 1Rx branch RedCap UE. If the 1Rx branch RedCap UE resides in the cell, the RedCap UE cannot receive the paging message, affecting the service of the RedCap UE.

[0132] For example, the UE receives a paging message in the current cell and needs to enter the RRC connected state in response to the paging message. However, because the UE's capabilities do not meet the spectrum transmission requirements, bandwidth and other configurations of the current cell (the network configuration exceeds the UE capabilities), the UE cannot access the cell, or the UE cannot work normally after accessing the cell.

[0133] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as the new radio (NR) system of the fifth generation (5G) mobile communication system, future communication systems such as the sixth generation (6G) mobile communication system, or other similar systems that require resident determination by MR and / or LR. The embodiments of the present application are not limited to the applicable communication systems.

[0134] The embodiments of the present application will present various aspects, embodiments, or features around a system that may include multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the figures. Furthermore, combinations of these solutions may also be used.

[0135] Additionally, in the embodiments of this application, words such as "exemplarily" and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as an "exemplary" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of the word "exemplary" is intended to present concepts in a concrete manner.

[0136] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. A and B can be singular or plural. Furthermore, the character " / " as used herein generally indicates an "or" relationship between the associated objects, but it may also indicate an "and / or" relationship. For specific understanding, please refer to the context.

[0137] In the embodiments of the present application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and / or c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0138] In the embodiments of the present application, the terms "information," "signal," "message," "channel," and "signaling" may sometimes be used interchangeably. It should be noted that, when the distinction between them is not emphasized, the meanings they intend to convey are the same. The terms "of," "corresponding," and "corresponding" may sometimes be used interchangeably. It should be noted that, when the distinction between them is not emphasized, the meanings they intend to convey are the same.

[0139] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0140] Figure 1 is a schematic diagram of the architecture of a communication system applicable to the communication method provided in an embodiment of the present application. To facilitate understanding of the embodiment of the present application, the communication system shown in Figure 1 is first used as an example to describe in detail a communication system applicable to the embodiment of the present application. It should be noted that the solutions in the embodiment of the present application can also be applied to other mobile communication systems, and the corresponding names can also be replaced with the names of corresponding functions in other mobile communication systems.

[0141] As shown in FIG1 , the communication system includes an access network device and a terminal device (referred to as a terminal for short).

[0142] The terminal device is a terminal that accesses the communication system and has a wireless transceiver function, or a chip or chip system that can be set in the terminal. The terminal device can also be called a user device, an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. For example, the terminal device can be a mobile phone, a tablet computer, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical care, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a vehicle-mounted terminal, an RSU with terminal function, etc. The terminal device of the present application can also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit built into the vehicle as one or more components or units. The vehicle can implement the communication method provided by the present application through the built-in vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit.

[0143] The above-mentioned access network device is an access network located in the above-mentioned communication system, and is a device with wireless transceiver functions or a chip (system) or other parts or components that can be set in the device. Access network equipment includes, but is not limited to, evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB, or home Node B, HNB), baseband unit (BBU), wireless relay node, wireless backhaul node, transmission point (TRP or transmission point, TP), etc. It can also be 5G, such as gNB or ng-eNB in ​​NR system, or transmission point (TRP or TP), one or a group of (including multiple antenna panels) antenna panels of a base station in 5G system, or it can also be a network node constituting a gNB or transmission point, such as a baseband unit (BBU), or a distributed unit (DU), a road side unit (RSU) with base station function, etc. The UE's serving base station, gNB, can be used to provide the UE with 5G NR user plane and control plane protocol functions. The UE's serving base station, ng-eNB, can be used to provide the UE with 4G evolved universal terrestrial radio access (E-UTRA) user plane and control plane protocol functions.

[0144] For example, if the access network device is a gNB, the gNB and the UE can communicate. For example, the gNB can send paging messages and information related to camping determination to the UE. Furthermore, the UE can send an RRC Establishment Request message to the gNB to request establishment of a connection with the gNB. Alternatively, the UE can send an RRC Resume Request message to the gNB to request restoration of the connection with the gNB.

[0145] It should be understood that Figure 4 is a simplified schematic diagram for ease of understanding, and the communication system may also include other network devices and / or other terminal devices. For example, the communication system may also include core network devices in the core network. For example, it may include the access and mobility management function (AMF) and user plane function (UPF) in the 5G core network (5G core network, 5GC).

[0146] Figure 5 is a schematic diagram of the structure of a communication device that can be used to execute the communication method provided in an embodiment of the present application. The communication device can be a network device (such as an access network device or a core network device), or a chip (system) applicable to a network device, or a terminal, or a chip (system) applied to a terminal, or other components or assemblies.

[0147] As shown in Figure 5, the communication device 200 may include a processor 201 and a memory 202. Optionally, the communication device 200 may further include a transceiver 203. The processor 201 is coupled to the memory 202 and the transceiver 203, for example, via a communication bus.

[0148] The following is a detailed introduction to the various components of the communication device 200 in conjunction with FIG5 :

[0149] Processor 201 is the control center of communication device 200 and can be a single processor or a collective term for multiple processing elements. For example, processor 201 can be one or more central processing units (CPUs), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present application, such as one or more digital signal processors (DSPs) or one or more field programmable gate arrays (FPGAs).

[0150] The processor 201 may execute various functions of the communication device 200 by running or executing software programs stored in the memory 202 and calling data stored in the memory 202 .

[0151] In a specific implementation, as an embodiment, the processor 201 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG5 .

[0152] In a specific implementation, as an embodiment, the communication device 200 may also include multiple processors, such as the processor 201 and the processor 204 shown in FIG5 . Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor herein may refer to one or more communication devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0153] The memory 202 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or 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 202 may be integrated with the processor 201 or exist independently and be coupled to the processor 201 via an input / output port (not shown in FIG5 ) of the communication device 200, which is not specifically limited in this embodiment of the present application.

[0154] The memory 202 is used to store the software program for executing the solution of the present application, and the execution is controlled by the processor 201. The above specific implementation can refer to the following method embodiment, which will not be repeated here.

[0155] The transceiver 203 is used for communication with other communication devices. For example, if the communication device 200 is a terminal device, the transceiver 203 can be used to communicate with a network device. For another example, if the communication device 200 is a network device, the transceiver 203 can be used to communicate with the terminal device. In addition, the transceiver 203 may include a receiver and a transmitter (not shown separately in FIG5 ). The receiver is used to implement a receiving function, and the transmitter is used to implement a transmitting function. The transceiver 203 can be integrated with the processor 201 or exist independently and be coupled to the processor 201 via an input / output port (not shown in FIG5 ) of the communication device 200, which is not specifically limited in the embodiments of the present application.

[0156] It should be noted that the structure of the communication device 200 shown in FIG5 does not constitute a limitation on the communication device. An actual communication device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0157] Figure 6 is a flow chart of a communication method according to an embodiment of the present application. This communication method can be applied to the communication between the network device and the terminal device shown in Figure 4.

[0158] As shown in FIG6 , the communication method includes the following steps:

[0159] S101: A terminal receives first information, where the first information is used for residence determination.

[0160] As a possible implementation manner, the first cell broadcasts the first information, and the terminal may receive the first information broadcast by the first cell.

[0161] Optionally, the first cell periodically sends the first information. The embodiment of the present application may also send the first information in other ways, which is not limited thereto.

[0162] Optionally, the first information includes at least one of the following information: cell prohibition indication information, specific same-frequency reselection indication information, half-duplex indication, PLMN information, cell special use indication information, tracking area information, frequency band information, spectrum emission requirement information, carrier bandwidth, bandwidth part BWP information, and frequency offset indication information.

[0163] Table 1-2

[0164] The residency determination includes determining whether the terminal can reside in or access the first cell, and / or determining whether the terminal's capabilities meet the configuration of the first cell. The terminal's capabilities meeting the configuration of the first cell can also be understood as the terminal's capabilities meeting the parameters of the first cell. For example, the terminal's bandwidth capability meets the bandwidth of the first cell.

[0165] For example, the first cell may be the cell to which the terminal is currently moving. For example, if the terminal moves from cell 4 to cell 5 in Figure 3, the first cell is cell 5. The terminal receives the first information and uses it to determine whether to reside in cell 5. For example, the terminal may determine whether it can reside in or access cell 5. Alternatively, the terminal may determine whether its capabilities meet the configuration of cell 5.

[0166] At least one item of the first information is introduced as follows:

[0167] Cell bar indication information (cell bar indication): The cell broadcasts a cell bar indication field (cellBarred), which is used to indicate whether the cell is barred (barred) or not barred (notBarred).

[0168] As a possible implementation manner, if the cell barring indication field indicates that the cell is barred, the terminal considers that it cannot reside in or access the cell.

[0169] Optionally, there may be different cell barring indication fields for UEs with different characteristics or different types. For example, a terminal using non-terrestrial network (NTN) access technology can determine whether the current cell supports the terminal's residency or access using NTN technology based on the NTN-specific cell barring indication field. For another example, a terminal using integrated access and backhaul (IAB) technology can determine whether the current cell supports the terminal's residency or access based on the IAB-specific cell barring indication field. For another example, a reduced capability (RedCap) terminal (UE) can determine whether the current cell supports the terminal's residency or access based on the RedCap-specific cell barring indication field.

[0170] Optionally, for RedCap UEs with one receive channel (1Rx branch) and two receive channels (2Rx branches), the cell barring indications can be independent of each other. In other words, one cell barring indication field can be used to indicate whether the current cell of a RedCap UE in the 1Rx branch supports the UE's residency or access. Another cell barring indication field can be used to indicate whether the current cell of a RedCap UE in the 2Rx branches supports the UE's residency or access.

[0171] For example, for RedCap UE, if the cell barring indication information broadcast by a certain cell for 1Rx branch UE is "barred", then the cell will not send paging for 1Rx branch RedCap UE subsequently. If the 1Rx branch RedCap UE resides in the cell, the RedCap UE cannot receive the paging, which affects the service of the RedCap UE. In an embodiment of the present application, the terminal may perform a residency determination based on the cell barring indication information in the first information sent by the first cell, and only continue to reside in the first cell if it is determined that the cell barring indication information of the first cell indicates notBarred. Otherwise, the terminal performs cell reselection to avoid the terminal residing in a cell that does not send paging for the terminal.

[0172] Specific intra-frequency reselection indicator: The cell supporting RedCap broadcasts the intra-frequency reselection indication field for RedCap UE. This field is used to indicate whether the RedCap UE is allowed to reselect to other cells with the same frequency as the current cell if it cannot stay in or access the current cell.

[0173] As a possible implementation, if the first information broadcast by the current cell does not include the intra-frequency reselection indication field, it indicates that the current cell does not support RedCap UEs, and the current cell subsequently does not send paging for RedCap UEs. The RedCap UE may determine that the RedCap UE cannot reside in or access the current cell based on the first information not including the intra-frequency reselection indication field.

[0174] Half duplex indication: A cell supporting RedCap broadcasts a half duplex support indication field for RedCap UEs. This field is used to indicate that the current cell supports half duplex.

[0175] As a possible implementation, if the first information broadcast by the current cell does not include the half-duplex support indication field, it indicates that the current cell does not support half-duplex, and the current cell will not subsequently send paging to RedCap UEs. Therefore, a half-duplex RedCap UE can determine that it cannot camp on or access the cell based on the first information not including this field.

[0176] Public land mobile network (PLMN) information: The cell broadcasts PLMN information, which may include the identity information of one or more PLMNs to which the cell belongs.

[0177] In some cases, if the PLMN information broadcast by the cell does not contain a PLMN that is the same as the selected PLMN, registered PLMN, or equivalent PLMN of a terminal, the cell will not subsequently send paging to the terminal.

[0178] As a possible implementation, if the PLMN information broadcast by the cell does not contain a PLMN that is identical to the terminal's selected PLMN, and does not contain a PLMN that is identical to the terminal's registered PLMN, the terminal determines that it cannot reside in or access the cell. Conversely, if the PLMN information broadcast by the cell contains a PLMN that is identical to the terminal's selected PLMN, a PLMN that is identical to the terminal's registered PLMN, or a PLMN that is identical to the terminal's equivalent PLMN, the terminal determines that it can reside in or access the cell.

[0179] Cell Special Use Indication Information: The cell broadcasts a cell special use indication field, which is used to indicate that the cell is reserved for a special use. Optionally, special uses may include but are not limited to: reserved for operators (cellReservedForOperatorUse), reserved for other uses (cellReservedForOtherUse), and reserved for future uses (cellReservedForFutureUse).

[0180] As a possible implementation, if a cell broadcasts the cell special use indication field, it means that the cell has been reserved for special use. The cell can be called a special use cell, and the terminal (or some specific terminals) is determined not to be able to reside in or access the cell.

[0181] Some specific terminals may refer to terminals that do not need to reside in a special purpose cell, or may refer to terminals that are not related to a special purpose, terminals that do not meet / do not satisfy a special purpose, or terminals that are not used for a special purpose.

[0182] Tracking area information: Tracking area information includes tracking area code information or tracking area list information.

[0183] As a possible implementation, for one or more PLMNs to which a cell belongs, the cell broadcasts information about the tracking area identifiers of the cell in each PLMN, or broadcasts information about the tracking area list of the cell in each PLMN. The tracking area list may include one or more tracking area identifiers.

[0184] In some cases, if a cell does not broadcast the tracking area identifier (or tracking area list) corresponding to a terminal's PLMN, the cell will not subsequently send paging to the terminal. The terminal's PLMN includes one or more of the selected PLMN, equivalent PLMN, and registered PLMN.

[0185] As a possible implementation, if the cell does not broadcast the tracking area identifier or tracking area list corresponding to the terminal's selected PLMN, the terminal's registered PLMN, or the terminal's equivalent PLMN, the terminal determines that it cannot reside in or access the cell. Alternatively, none of the PLMNs corresponding to the tracking area identifier (or tracking area list) broadcast by the cell are the terminal's PLMN.

[0186] Frequency band information: A cell broadcasts information about one or more frequency bands to which the cell belongs, for example, an uplink frequency band list (FrequencyBandList) and / or a downlink frequency band list.

[0187] As a possible implementation manner, if the frequency band broadcast by the cell does not include a frequency band supported by the terminal, the terminal determines that it cannot reside in or access the cell.

[0188] Optionally, for a time division duplex (TDD) system, the terminal may determine whether a frequency band supported by the terminal is in the downlink frequency band list broadcast by the cell. If the frequency band supported by the terminal is not in the downlink frequency band list, the terminal determines that it cannot reside in or access the cell. Conversely, if the frequency band supported by the terminal is in the downlink frequency band list, the terminal determines that it can reside in or access the cell.

[0189] Optionally, for a frequency division duplex (FDD) system, the terminal may determine whether a frequency band supported by the terminal is in the uplink frequency band list broadcast by the cell. If the frequency band supported by the terminal is not in the uplink frequency band list, the terminal determines that it cannot reside in or access the cell. If a frequency band supported by the terminal is in the uplink frequency band list and the frequency band is not a downlink-only band, the terminal determines that it can reside in or access the cell. If a frequency band supported by the terminal is in the uplink frequency band list and the frequency band is a downlink-only band, the terminal determines that it cannot reside in or access the cell.

[0190] Spectrum emission requirement information: A cell broadcasts the emission parameters of one or more frequency bands to which the cell belongs. The emission parameters of the frequency band are used to indicate the emission requirements of a terminal when operating on the frequency band.

[0191] As a possible implementation, if the terminal does not support the corresponding transmission parameters broadcast by the cell for all frequency bands supported by the terminal, the terminal is determined to be unable to reside in or access the cell. For example, if the terminal supports frequency bands 1-3, and the cell broadcasts transmission parameters for frequency band 1 as A, frequency band 2 as B, and frequency band 3 as C, if the terminal does not meet the transmission parameters broadcast by the cell when operating on frequency bands 1-3, the terminal is determined to be unable to reside in or access the cell.

[0192] Carrier bandwidth: The cell broadcast uplink carrier bandwidth and / or downlink carrier bandwidth.

[0193] As a possible implementation manner, if the channel bandwidth supported by the terminal is greater than the carrier bandwidth broadcast by the cell, the terminal determines that it cannot reside in / access the cell.

[0194] Bandwidth part (BWP) information: The cell broadcasts the bandwidth of the initial uplink BWP and / or the bandwidth of the initial downlink BWP.

[0195] As a possible implementation manner, if the channel bandwidth supported by the terminal is smaller than the initial BWP bandwidth broadcast by the cell, the terminal determines that it cannot reside in or access the cell.

[0196] Frequency shift indication information: The cell broadcasts a 7.5kHz frequency shift indication field (frequency shift 7p5khz), which is used to indicate that the NR uplink transmission is shifted 7.5kHz to the LTE raster.

[0197] As a possible implementation manner, if the cell has broadcast a 7.5 kHz frequency offset indication field, but the terminal does not support the 7.5 kHz frequency offset, the terminal determines that it cannot reside in or access the cell.

[0198] S102: The terminal performs a residency determination through the main circuit MR and / or the low power circuit LR according to the first information.

[0199] As a possible implementation, if at least one of the following conditions is met, the terminal performs a residency determination:

[0200] The first cell is a cell for which a residency determination has not been performed; a certain period of time has passed since the last residency determination was performed on the first cell; and the terminal has already visited other cells since the last residency determination was performed on the first cell. "The terminal has visited a cell" can be understood as meaning that the terminal has resided in, accessed, or connected to a cell, and this embodiment of the application does not impose any limitation thereto.

[0201] On the contrary, if any of the above conditions is not met, the terminal may not perform the residency determination.

[0202] Optionally, as shown in FIG7 , the terminal may perform a residency decision based on the first information via the MR. Alternatively, as shown in FIG8 , the terminal may perform a residency decision based on the first information via the LR. Alternatively, as shown in FIG9 , the terminal may perform a residency decision via both the LR and the MR, such that the LR performs a residency decision based on partial information (the second information) in the first information, and the MR performs a residency decision based on third information in the first information (e.g., information in the first information other than the second information).

[0203] In the embodiment of the present application, the terminal can promptly perform a residency determination through the LR and / or MR based on the first information used for residency determination. In this way, it can be determined whether the terminal can reside in or access the current cell (such as the first cell), so as to determine whether to subsequently access the current cell or reselect a cell to access a new cell. In this way, it can avoid the terminal directly attempting to access the current cell and failing, which affects the service experience of the terminal.

[0204] Optionally, as shown in FIG10 , the method may further include the following step S201; or execute S202 and S203:

[0205] S201: If a first condition is met, the terminal resides in or accesses the first cell.

[0206] The first condition includes at least one of the following conditions: the first cell can be camped on by the terminal, the first cell can be accessed by the terminal, and the capability of the terminal complies with the configuration of the first cell.

[0207] If the first condition is satisfied after the camp determination, the terminal can camp on or access the first cell normally, or the probability of the terminal successfully camping on or accessing the first cell is high, which means that the camp determination for the first cell has passed. The terminal then camps on or accesses the first cell. As a possible implementation, the terminal camps on or accesses the first cell via the MR. Alternatively, the terminal can camp on the first cell via the LR.

[0208] As an example of a possible implementation, the terminal accessing the first cell through the MR may be implemented as follows:

[0209] If the terminal is in an inactive state and the first cell belongs to the RNA of the terminal, an RRC resume request message is sent to the first cell through the MR. The RRC resume request message is used to restore the connection with the first cell. As shown in Figure 3, if the inactive terminal moves from cell 1 to cell 3, the first cell is cell 3. If cell 3 belongs to the RNA of the terminal and the terminal has not moved out of the range of the RNA, the terminal sends an RRC resume request message to cell 3 to restore the RRC connection with cell 3.

[0210] The terminal sending the RRC recovery request message to the first cell can be understood as the terminal sending the RRC recovery request message to the network device (such as a base station) covering the first cell. Similarly, in the embodiment of the present application, the terminal sending a message to the cell can be understood as the terminal sending the message to the network device (such as a base station) covering the cell.

[0211] Alternatively, the terminal accesses the first cell through the MR, which can be implemented as follows: if the terminal is in an inactive state and the first cell does not belong to the RNA of the terminal, an RRC setup request message is sent to the first cell through the MR, and the RRC setup request message is used to request to establish a connection with the first cell. In this case, as a possible implementation method, the inactive terminal can enter the idle state and send an RRC setup request message to the first cell through the MR. As shown in Figure 3, if the inactive terminal moves from cell 3 to cell 4, the first cell is cell 4, and if cell 4 is not in the RNA of the terminal, the terminal sends an RRC setup request message to cell 4 to establish an RRC connection with cell 4.

[0212] Alternatively, the terminal accesses the first cell through the MR, which can be implemented as follows: if the terminal is in an idle state, an RRC establishment request message is sent to the first cell through the MR, where the RRC establishment request message is used to request establishment of a connection with the first cell.

[0213] Alternatively, the terminal accessing the first cell through the MR can be implemented as follows: before initiating the RRC connection establishment process, the terminal can first enter the RRC idle state from the RRC inactive state. In other words, the terminal can send an RRC establishment request message in the idle state or send an RRC establishment request message in the inactive state.

[0214] In the embodiment of the present application, the terminal can restore or establish a connection with the first cell according to its own state and / or whether the first cell is located within the RNA, thereby ensuring that the terminal initiates a correct connection establishment or restoration process and improving the success rate of the connection.

[0215] S202: If the second condition is met, the terminal performs cell reselection.

[0216] The second condition includes at least one of the following conditions: the first cell cannot be camped by the terminal, the first cell cannot be accessed by the terminal, and the capability of the terminal does not comply with the configuration of the first cell.

[0217] The terminal's capabilities do not conform to the configuration of the first cell. For example, the terminal's capabilities may not conform to the spectrum emission requirements or bandwidth configuration of the first cell. The terminal cannot access the first cell, or the terminal cannot operate normally after accessing the first cell. This embodiment of the application does not limit the situation where the terminal's capabilities do not conform to the cell configuration.

[0218] If the terminal determines through the residency determination that the second condition is met, it means that the terminal cannot normally reside in or access the first cell, or the probability of failure of the terminal to reside in or access the first cell is high, which can be regarded as failing the residency determination for the first cell. The terminal then performs cell reselection and selects a new second cell for residency or access. As shown in Figure 3, if the terminal moves to cell 4 and the residency determination determines that it cannot reside in or access cell 4, the terminal performs cell reselection and selects a cell other than cell 4 for residency or access.

[0219] The cell selected by cell reselection may be a cell that satisfies at least one of the following conditions: the cell belongs to the selected PLMN of the terminal, the cell belongs to the stand-alone non-public network (SNPN) selected by the terminal, the cell belongs to the registered PLMN of the terminal, the cell belongs to the SNPN registered by the terminal, the cell belongs to the equivalent PLMN of the terminal, and the cell meets the S criterion for cell selection.

[0220] The S criterion may refer to a cell receiving power Srxlev>0dB and a received signal quality Squal>0dB.

[0221] S203: The terminal resides in or accesses the second cell.

[0222] As a possible implementation manner, the terminal performs cell reselection, and after selecting the second cell, can reside in or access the second cell through the MR, or can reside in the second cell through the LR.

[0223] As a possible implementation manner, accessing the second cell may be implemented as follows:

[0224] If the terminal is in an inactive state and the second cell belongs to the notification area RNA based on the radio access network of the terminal, a radio resource control RRC recovery request message is sent to the second cell through the MR, and the RRC recovery request message is used to restore the connection with the second cell.

[0225] Alternatively, if the terminal is in an inactive state and the second cell does not belong to the RNA of the terminal, an RRC establishment request message is sent to the second cell through the MR, where the RRC establishment request message is used to request establishment of a connection with the second cell.

[0226] In one or more embodiments of the present application, the inactive terminal may enter an idle state and send an RRC establishment request message to the second cell through the MR.

[0227] Alternatively, if the terminal is in an idle state, an RRC establishment request message is sent to the second cell through the MR, where the RRC establishment request message is used to request establishment of a connection with the second cell.

[0228] In this way, when the terminal cannot reside in or access the first cell, the terminal can select a second cell that can reside or access through cell reselection to meet the terminal's residency or access requirements and reduce the probability of terminal service interruption or failure.

[0229] In addition, for a terminal in an RRC inactive state, when the terminal selects another cell, the terminal can determine whether the cell belongs to its RNA, so that the terminal can determine whether it should perform RRC connection recovery or RRC connection establishment subsequently. This can ensure that the inactive terminal initiates the correct connection process for different types of cells, thereby improving the success rate of the connection.

[0230] Taking the terminal performing residency determination through MR as an example, FIG11 shows an example of the method flow of an embodiment of the present application. As shown in FIG11 , the method includes the following steps:

[0231] S301: A terminal receives first information through an MR, where the first information is used for residence determination.

[0232] In the embodiment corresponding to FIG11 , the specific implementation of some steps is not expanded in detail. For this part, reference may be made to the corresponding steps of other embodiments and no further description will be given.

[0233] The order between S301 and other steps is not limited. For example, S301 can be executed before S305, or can be executed simultaneously with S305.

[0234] S302. The terminal determines cell change information through the LR.

[0235] S302 is an optional step.

[0236] The cell change information includes at least one of the following information: information on whether the cell has changed, information on the currently resident cell, and information on the resident or previously accessed cell.

[0237] As a possible implementation manner, the terminal may sense the change of the cell through the LR and record the cell change information through the LR.

[0238] As a possible implementation, if the cell that the terminal has passed through has changed within a certain period of time, the LR records "cell changed". Conversely, if the cell that the terminal has passed through has not changed, the LR records "cell not changed" or does not record it.

[0239] For example, assuming that the UE activates LR in cell 1, after the UE moves to cell 2, the LR records "the cell has changed". The UE subsequently moves to cell 3, and the LR still records "the cell has changed". The UE subsequently moves back to cell 1, and the LR records "the cell has not changed", or the LR removes the previously recorded "the cell has changed". It can be seen that based on the cell (which can be called the reference cell) where the UE activates LR within a certain period of time, if the UE subsequently moves to another cell, the UE records "the cell has changed" through the LR. If the UE moves back to the reference cell within this period of time, the LR records "the cell has not changed".

[0240] For example, Table 2 shows an example of cell change information recorded by the LR:

[0241] Table 2

[0242] As shown in Table 2, the terminal records the information of reference cell 1 and whether the cell has changed through the LR. In this way, during the movement of the terminal, the terminal can know whether the current cell has changed relative to the reference cell 1 based on the above information.

[0243] Similarly, based on the cell where the UE is located when MR is turned off within a certain period of time, if the UE subsequently moves to another cell, the UE records "cell changed" in the LR. If the UE moves back to the reference cell within the same period of time, the LR records "cell unchanged".

[0244] Alternatively, as a possible implementation, the UE may record, through the LR, information about the cell in which the UE is currently residing. Optionally, the cell information may be cell identification information, such as a physical cell identifier (PCI) of the cell, a cell global identifier (CGI) of the cell, and the like.

[0245] For example, assuming that the UE activates LR (or deactivates MR) in cell 1, the LR records the information of cell 1. Subsequently, the UE moves to cell 2, and the LR records the information of cell 2. Subsequently, the UE moves back to cell 1, and the LR records the information of cell 1. In other words, the UE can record the information of the cell to which it has most recently moved. For example, Table 3 shows an example of cell change information recorded by the LR:

[0246] Table 3

[0247] As shown in Table 3, the terminal records the information of the cell it has recently moved to through the LR. In this way, during the movement of the terminal, the terminal can learn the cell it has recently moved to based on the above information, so as to make a stay decision on the new cell in a timely manner, reducing the probability of terminal service interruption.

[0248] Alternatively, as a possible implementation manner, the UE records information of each cell that the UE has experienced through the LR.

[0249] Optionally, the cell information recorded by the LR may be sorted according to certain rules, for example, the information of the cell to which the user has moved most recently is placed at the end or the beginning of the recorded information.

[0250] For example, assuming that the UE activates LR (or deactivates MR) in cell 1, the LR records the information of cell 1. Subsequently, the UE moves to cell 2, and the LR adds the information of cell 2 to the recorded information. Optionally, the information of cell 2 may be located after the information of cell 1. Subsequently, the UE moves back to cell 1 again, and the LR adds the information of cell 1 to the recorded information. The recorded information includes the information of cell 1, cell 2, and cell 1. For example, Table 4 shows an example of cell change information recorded by the LR:

[0251] Table 4

[0252] S303: The terminal wakes up the main circuit based on the wake-up condition.

[0253] Optionally, the terminal receives a wake-up signal through the LR, and the LR wakes up the MR according to the wake-up signal. In other words, the wake-up condition is that the LR receives the wake-up signal.

[0254] Optionally, the wake-up signal may be, but is not limited to, LP-WUS. The wake-up signal is used to paging the terminal, and the wake-up signal used to paging the terminal may be referred to as a first wake-up signal.

[0255] Exemplarily, if the LR detects, receives, or successfully decodes an LP-WUS, the LR wakes up the MR. Optionally, the LR wakes up the MR only if the LR determines that the LP-WUS is paged for the terminal. Otherwise, the LR does not wake up the MR to avoid unnecessary power consumption caused by waking up the MR.

[0256] Optionally, the wake-up condition may also be: data transmission or service execution. That is, the MR is woken up when the terminal needs to perform data transmission or service execution.

[0257] Alternatively, the wake-up condition may be other conditions, for example, the terminal wakes up the MR in response to a received paging message. The embodiment of the present application does not limit the wake-up condition, and any condition indicating that the terminal needs to enter the connected state can be used as a condition for waking up the MR.

[0258] When at least one of the above wake-up conditions is met, the terminal needs to enter the connected state to process services, data, or perform corresponding operations in response to the wake-up signal (such as receiving earthquake and tsunami warnings). Accordingly, the terminal determines that the wake-up condition is met, which can be understood as the terminal determining that the terminal needs to enter the connected state. When it is determined that the terminal needs to enter the connected state, the terminal performs the following steps to make a residency determination in a timely manner, and determines whether to enter the connected state in the current first cell or in the reselected second cell according to the result of the residency determination, so as to avoid the terminal directly attempting to access the current first cell, resulting in access failure or access delay.

[0259] The above example uses LR waking up MR as an example. In the embodiment of the present application, the method for LR to wake up MR is not limited. For example, LR may send a signal or current to MR to wake up MR, or LR may use other methods to wake up MR.

[0260] In other embodiments, the MR may also be awakened by other modules / programs / components in the terminal other than the LR. For example, when data transmission or service execution is required, the MR may be awakened by other modules in the terminal.

[0261] In the embodiment of the present application, waking up the MR may refer to turning on the MR, or triggering the MR to exit a sleep state (or sleep mode), or triggering the MR to enter a wake-up state (or wake-up mode).

[0262] S304. The terminal sends the cell change information to the MR through the LR.

[0263] As a possible implementation, if the LR records cell change information, it can send the cell change information to the MR when waking up the MR or after waking up the MR. This allows the MR to detect the terminal's cell change and perform a camp-on decision on the terminal's current primary cell based on the terminal's cell change. This shortens the time it takes for the terminal to enter the connected state and improves communication efficiency.

[0264] S304 is an optional step.

[0265] S305: The terminal performs a residency determination according to the first information through the MR.

[0266] Optionally, after being awakened, the MR may determine whether the first cell it currently resides in is the same as the cell it last resided in based on the cell change information. Alternatively, the MR may determine whether the first cell it currently resides in is the same as the cell it last resided in based on the cell change information.

[0267] In the embodiment of the present application, after the MR is awakened, the awakened MR performs a residency determination on the first cell according to the first information.

[0268] For example, if the MR determines, based on the cell change information, that the terminal is currently located in the cell 4 shown in FIG. 3 , the MR may perform a camping determination on the cell 4 based on the first information.

[0269] As a possible implementation manner, if the third condition is met, the terminal performs a residency decision according to the first information through the MR.

[0270] Among them, the third condition includes at least one of the following conditions: the terminal has not performed a residence judgment on the first cell, the time interval between the terminal and the last time the terminal performed a residence judgment on the first cell exceeds a threshold, and the terminal leaves the first cell after performing a residence judgment on the first cell.

[0271] Since the parameters of the cell may change, if the time interval between the last time the terminal performed a residence determination on the first cell exceeds a threshold, or the terminal leaves the first cell after performing a residence determination on the first cell, in order to avoid the impact of the parameter change of the first cell after the last residence determination, the terminal can re-perform the residence determination on the first cell through the MR to improve the accuracy of the residence determination.

[0272] In an embodiment of the present application, the MR can determine whether it is necessary to perform a residency determination before entering the connected state in response to the wake-up condition (such as receiving a wake-up signal or transmitting data) based on the cell change information from the LR, so that the terminal can respond more accurately and avoid unnecessary operations that bring additional complexity and delay. It can be seen that for the terminal of the LP-WUS mechanism, the MR will be awakened by the terminal responding to the wake-up signal or data transmission requirements, and the MR will perform the residency determination, which can enable the terminal to determine whether to enter the connected state in the current cell or select another cell to enter the connected state, thereby avoiding the connection failure or connection delay caused by the terminal directly attempting to enter the connected state in the current cell.

[0273] As another possible implementation, steps related to "recording cell change information" may be omitted. For example, steps S302 and S304 may be omitted from the process of FIG11 . In this case, the MR may perform a residency determination each time it is awakened, or based on other triggering conditions, such as performing a residency determination before transmitting data.

[0274] After the residency determination, if the residency determination is passed (the first condition is met), the following step S306 is executed; otherwise, if the residency determination is not passed (the second condition is met), the following steps S307 and S308 are executed.

[0275] S306. The terminal accesses the first cell.

[0276] Taking the example of a terminal receiving a wake-up signal and needing to enter a connected state, in some cases, if the first cell is accessible to the terminal through the above-mentioned residence determination, the terminal enters a connected state for the first cell in order to perform subsequent operations in response to the wake-up signal. As an example, the terminal can access the first cell through an MR.

[0277] S307: The terminal performs cell reselection.

[0278] Optionally, the terminal performs cell reselection through the MR.

[0279] Exemplarily, after the MR performs the camp determination, if the camp determination fails, which means that the first cell cannot be camped on or accessed, the MR performs cell reselection.

[0280] S308. The terminal accesses the second cell.

[0281] Taking the example of a terminal transmitting data and needing to enter a connected state, in some cases, if the first cell cannot be accessed by the terminal through the above-mentioned residence determination, the terminal performs cell reselection (such as reselecting to a second cell) and attempts to enter a connected state in the second cell in order to send data to the second cell.

[0282] As an example, the terminal may perform cell reselection through the MR and access the reselected second cell.

[0283] Compared to the related art, when the terminal moves within a certain area (area A as shown in Figure 3), the terminal or the MR may not perceive the change of the cell, and the terminal may reside in a cell that cannot be resided, affecting the terminal's service. In the embodiment of the present application, when the terminal moves within a certain area, when the terminal needs to enter the connected state, the MR can perform a residency determination, which can improve the efficiency of the residency determination, facilitate the terminal to promptly determine whether the current cell can be accessed or resided, and promptly select a suitable cell for residency or access based on the result of the residency determination, thereby avoiding the terminal trying to enter the connected state in an inappropriate cell and failing, and reducing the probability of terminal service interruption or delay.

[0284] Taking the terminal performing residency determination through the LR as an example, FIG12 shows an example of a method flow in an embodiment of the present application. As shown in FIG12 , the method includes the following steps:

[0285] S401: A terminal receives first information through an LR, where the first information is used for residence determination.

[0286] As a possible implementation manner, the first cell broadcasts the first information, and the terminal may receive the first information broadcast by the first cell.

[0287] Alternatively, the first cell sends the first information via LP-WUS.

[0288] Alternatively, the first cell sends the first information through other signals or signaling.

[0289] In the embodiment corresponding to FIG12 , the specific implementation of some steps is not expanded in detail. For this part, reference may be made to the corresponding steps of other embodiments, which are described uniformly here and will not be repeated.

[0290] S402: The terminal performs a residency decision according to the first information through the LR.

[0291] For the specific implementation of the LR performing the residency determination according to the first information, reference may be made to the relevant steps of other embodiments (such as step S102), which will not be described in detail here.

[0292] Optionally, after the LR performs the residency determination, it can send the result of the residency determination to the MR so that the MR knows whether the first cell can be resided or accessed, so that the MR can determine whether to enter the connected state in the current first cell or in the reselected cell, so as to improve the efficiency of entering the connected state.

[0293] S403: The terminal wakes up the main circuit based on the wake-up condition.

[0294] Optionally, the wake-up condition may include at least one of the following conditions: receiving a wake-up signal; receiving a wake-up signal and the wake-up signal paging the terminal; requiring data transmission; or requiring service execution. The wake-up signal here is used to page the terminal, and the wake-up signal used to paging the terminal may be referred to as a first wake-up signal.

[0295] If at least one of the above wake-up conditions is met, the terminal needs to enter the connected state to process services and data, or perform corresponding operations in response to the wake-up signal (such as receiving earthquake and tsunami warnings). Accordingly, the terminal's determination that the wake-up condition is met can be understood as the terminal's determination that the terminal needs to enter the connected state. If it is determined that the terminal needs to enter the connected state, the terminal performs the following steps to make a residency determination.

[0296] Regarding the specific implementation of the terminal waking up the MR, reference may be made to the relevant steps of other embodiments (eg, step S303 ).

[0297] For example, after receiving the wake-up signal, the LR wakes up the MR so that the MR can respond to the wake-up signal and enter the connected state. For another example, when the terminal has data to transmit, it wakes up the MR so that the terminal can transmit the data through the MR.

[0298] The embodiment of the present application does not limit the execution order between S403 and S402. For example, in FIG8 , the LR first performs the residency determination and wakes up the MR after the residency determination is completed. Alternatively, the terminal wakes up the MR during the residency determination.

[0299] S404: The terminal accesses the first cell.

[0300] If the first condition is met, meaning the above-mentioned stay determination is passed, the terminal may attempt to enter the connected state on the current first cell in response to the wake-up signal or data transmission requirement. As an example, the terminal may attempt to enter the connected state on the first cell through the woken-up MR.

[0301] S405: The terminal performs cell reselection.

[0302] If the second condition is met, which means that the above-mentioned stay determination fails, the terminal can attempt to perform cell reselection (such as reselecting to the second cell) in response to the wake-up signal or data transmission demand, and enter the connected state on the reselected second cell.

[0303] Optionally, the terminal performs cell reselection through the awakened MR, or performs cell reselection through the LR. For example, after the LR determines that the current first cell is not camped on or accessible, or when the terminal wakes up the MR in response to paging (such as receiving a wake-up signal), the LR can notify the MR of the camp determination result (pass or fail), or the LR can notify the MR to perform cell reselection, or the LR can trigger the MR to perform cell reselection.

[0304] The embodiment of the present application does not limit the execution order of step S406 and step S404.

[0305] After determining that the first cell is inaccessible or unavailable for camping on, the terminal may perform cell reselection. Alternatively, if the terminal performs cell reselection before waking up the MR and selects a cell other than the first cell (e.g., cell 3), the terminal will monitor the wake-up signal from the reselected cell 3 and no longer monitor the wake-up signal from the first cell before reselection. The terminal may wake up the MR based on the wake-up signal monitored in cell 3.

[0306] As a possible implementation, if any one or more of the cell barring indication information, specific same-frequency reselection indication information, half-duplex indication, public land mobile network (PLMN) information, cell special purpose indication information, and tracking area information satisfies the second condition (residence determination fails), then cell reselection is performed after the stay determination. Because based on one or more of the information corresponding to indexes 1-6 in Table 1-2, if the one or more information of the current cell satisfies the second condition, the terminal determines that the current cell is likely not to send a paging message to the terminal, and the terminal may not be able to receive a paging message if it continues to stay in the current cell. Therefore, the terminal can promptly change a cell to stay in so that it can be paged normally by the network side.

[0307] In other words, after the terminal determines that the first cell cannot be camped on or accessed based on one or more pieces of information corresponding to indexes 1-6 in Table 1-2, it can promptly perform cell reselection.

[0308] Alternatively, after waking up the MR, the terminal may perform cell reselection when it needs to enter a connected state.

[0309] As a possible implementation method, if any one or more of the frequency band information, spectrum emission requirement information, carrier bandwidth, bandwidth part BWP information, and frequency offset indication information meets the second condition, then cell reselection is performed when it is necessary to enter the connected state. Because based on one or more of the information corresponding to indexes 7 to 11 shown in Table 1-2, if the one or more information of the current cell meets the second condition, it means that it may not affect the terminal's reception of paging in the current cell, but the terminal is likely to be unable to access the current cell or unable to enter the connected state on the current cell. Therefore, the terminal can reselect the cell when it needs to enter the connected state later. If the terminal does not need to enter the connected state, it can temporarily monitor the paging in the current cell. In this way, if it is determined that it does not affect the terminal's reception of paging in the current cell, cell reselection can be omitted if the terminal does not enter the connected state, thereby reducing the power consumption of the terminal.

[0310] For example, after the terminal determines that the first cell is not resident or accessible based on one or more of the information corresponding to indexes 7 to 11 shown in Table 1-2, the terminal may perform cell reselection through the MR after receiving a paging message for the terminal (such as receiving a wake-up signal). For another example, after the terminal determines that the first cell is not resident or accessible based on one or more of the information corresponding to indexes 7 to 11 shown in Table 1-2, the terminal may perform cell reselection through the MR when performing data transmission or service execution.

[0311] S406. The terminal accesses the second cell.

[0312] Exemplarily, the terminal performs cell reselection through the LR, and the LR may notify the MR of information of the reselected cell (eg, reselection to the second cell), so that the MR accesses the second cell.

[0313] Or, illustratively, when the terminal performs cell reselection (such as reselecting to the second cell) through the MR, the MR accesses the second cell.

[0314] In an embodiment of the present application, a terminal using the LP-WUS mechanism can receive the first information through the LR. The terminal performs a residency determination on the current first cell based on the first information through the LR. In this way, if the current first cell cannot be resided or accessed, the terminal can select another available cell to reside or connect to. On the one hand, this can prevent the terminal from residing on a cell that does not send a paging message for the terminal, resulting in the terminal being unable to be paged. On the other hand, this can prevent the terminal from attempting to enter a connected state in an inaccessible cell and failing, resulting in an inability to establish or restore a connection and affecting the terminal's services.

[0315] In addition, the terminal performs residence determination through the LR, and does not need to specifically open the MR to perform residence determination, which reduces the unnecessary MR opening frequency and thus can reduce additional power consumption.

[0316] Taking the example of a terminal collaboratively performing residency determination through MR and LR, FIG13 shows an example of a method flow of an embodiment of the present application. As shown in FIG13 , the method includes the following steps:

[0317] S501: A terminal receives second information through an LR, where the second information is used for residence determination.

[0318] The second information is part of the first information. For a detailed description of the first information, please refer to other embodiments (such as the description in S101).

[0319] Exemplarily, the second information includes at least one item of information: cell barring indication information, specific same-frequency reselection indication information, half-duplex indication, public land mobile network PLMN information, cell special use indication information, and tracking area information.

[0320] S502: The terminal performs a residency decision according to the second information through the LR.

[0321] Exemplarily, the LR performs residency determination based on the information corresponding to indexes 1-6 shown in Table 1-2.

[0322] In this way, the LR performs a stay decision based on part of the information in the first information (the six items of information corresponding to indexes 1-6 shown in Table 1-2), thereby ensuring that the terminal receives the paging message in the cell as much as possible.

[0323] S503: The terminal performs cell reselection.

[0324] This step is optional. If the LR determines that the residency determination is passed, it means that the current first cell can be resided or accessed, and this step does not need to be performed. On the contrary, if the residency determination is not passed, it means that the first cell cannot be resided, and the terminal can perform cell reselection.

[0325] Optionally, the terminal may perform cell reselection via the MR or LR. For example, if the LR determines that the first cell cannot be camped on, the LR notifies / requests / instructs the MR to perform cell reselection. For another example, if the LR determines that the first cell cannot be camped on, the LR performs cell reselection.

[0326] S504: The terminal determines the cell change information through the LR.

[0327] For the specific implementation of this step, please refer to the relevant steps in other embodiments (such as S302).

[0328] S505: The terminal wakes up the main circuit based on the wake-up condition.

[0329] For the specific implementation of this step, please refer to the relevant steps in other embodiments (such as S303).

[0330] S506: The terminal sends cell change information to the MR via the LR.

[0331] For the specific implementation of this step, please refer to the relevant steps in other embodiments (such as S304).

[0332] S507: The terminal receives third information through the MR, and the third information is used for residence determination.

[0333] S508: The terminal performs a stay decision according to the cell change information and the third information through the MR.

[0334] The third information includes information in the first information excluding the second information.

[0335] Exemplarily, the third information includes at least one of the following information: frequency band information, spectrum emission requirement information, carrier bandwidth, bandwidth part BWP information, and frequency offset indication information.

[0336] As a possible implementation method, the above-mentioned LR has performed a residency determination based on the second information in the first information. Then, when it is necessary to enter the connected state, the MR can perform a residency determination based on at least one information in the first information except the second information. That is to say, the third information can only include information in the first information except the second information, and the MR no longer performs a residency determination based on the second information. For example, the MR performs a residency determination based on the information corresponding to index 7-11 shown in Table 1-2, and no longer performs a residency determination based on the information corresponding to index 1-6. For another example, the MR performs a residency determination based on the information corresponding to index 7-9 shown in Table 1-2. In this way, the complexity and computational complexity of the MR's execution of the residency determination can be reduced, and the execution efficiency of the residency determination can be improved.

[0337] Alternatively, the MR may perform a residency determination based on at least one piece of information in the first information other than the second information, as well as at least a portion of the second information. For example, the MR may perform a residency determination based on the information corresponding to indexes 7-11 and indexes 1-3 shown in Table 1-2. In this way, the MR can incorporate more information to perform a residency determination, thereby improving the accuracy of the residency determination result.

[0338] If the first condition is met after the residence determination, the residence determination is passed, and the terminal can execute the following step S509; otherwise, the second condition is met, the residence determination is not passed, and the terminal can execute the following steps S510 and S511.

[0339] S509: The terminal accesses the first cell.

[0340] As an example, the terminal accesses the first cell through the MR. It should be noted that the specific implementation of the terminal accessing the first cell is not limited to this.

[0341] S510: The terminal performs cell reselection.

[0342] S511. The terminal accesses the second cell.

[0343] As an example, the terminal accesses the first cell through the MR. It should be noted that the specific implementation of the terminal accessing the first cell is not limited to this.

[0344] In this embodiment of the present application, the LR performs a residency determination based on part of the information in the first message (the second information) to ensure that the terminal resides in a cell where paging can be received. Subsequently, when the terminal needs to enter a connected state, the MR performs a residency determination based on part of the information in the first message (the third information) to ensure that the terminal selects the correct cell for access.

[0345] The above example uses the LR receiving the second information and the MR receiving the third information. In other embodiments, the LR may receive the first information and perform a residency determination based on the second information in the first information. Alternatively, the MR may receive the first information and perform a residency determination based on the third information in the first information.

[0346] In the above example, the LR performs the residency decision based on the second information and the MR performs the residency decision based on the third information. In other embodiments, the terminal may perform the residency decision based on the second information through the MR and the third information through the LR.

[0347] An embodiment of the present application further provides a communication method, in which a terminal may periodically or event-triggeredly perform a camp determination through an MR, so that the terminal determines whether a current first cell is accessible or camped on. In this way, the terminal can promptly change cells when the first cell is not accessible or camped on. As shown in FIG14 , the method may include:

[0348] S601: A terminal receives first information through an MR, where the first information is used for residence determination.

[0349] S602: The terminal wakes up the MR periodically, or wakes up the MR when triggered by an event.

[0350] The event includes at least one of the following: data to be transmitted, measurement to be performed, service to be performed, reception of a wake-up signal, reference signal quality below a threshold, wake-up signal decoding failure, reference signal decoding failure, inability to receive or detect a reference signal, reception of a system information update indication, reception of an ETWS, or reception of a CMAS alert. The wake-up signal here is used to send a notification to the terminal, which may include but is not limited to at least one of the following: a system information update indication, an ETWS, or a CMAS alert. The wake-up signal used to send a notification to the terminal may be referred to as a second wake-up signal.

[0351] In the embodiment of the present application, receiving a wake-up signal can be understood as detecting the wake-up signal, or as successfully decoding the wake-up signal. Similarly, receiving certain information can be understood as detecting the information, or as successfully decoding the information.

[0352] S603: The terminal performs a residency determination through the MR.

[0353] In the case that the MR is periodically awakened, the MR is periodically turned on and performs a residence determination according to the first information.

[0354] Optionally, the period for the MR to perform the residency determination may be configured by the network, pre-configured, specified by a protocol, or determined by the terminal itself.

[0355] When the MR is awakened by an event, the MR performs a camping decision after waking up to determine whether the current first cell is camped on or accessible.

[0356] It should be noted that the terminal periodically or event-triggeredly wakes up the MR regardless of the current state of the terminal. When there is no need to enter the connected state, the terminal can also wake up the MR periodically or in response to an event.

[0357] S604: If the first condition is met, the terminal turns off the MR or switches the MR to a sleep state.

[0358] The first condition includes at least one of the following conditions: the second cell can be camped on by the terminal, the second cell can be accessed by the terminal, and the capability of the terminal complies with the configuration of the second cell.

[0359] If the first condition is met, it means that the camping determination is passed, and the terminal can continue to camp on the current first cell. In addition, the terminal can turn off the MR or switch the MR to a sleep state to reduce the power consumption of the terminal.

[0360] S605: If the second condition is met, the terminal performs cell reselection.

[0361] The second condition includes at least one of the following conditions: the second cell cannot be camped by the terminal, the second cell cannot be accessed by the terminal, and the capability of the terminal does not comply with the configuration of the second cell.

[0362] Meeting the second condition means that the camp determination fails and the terminal cannot continue to camp on the current first cell. The terminal can search for other suitable cells (suitable cells) that can be camped or accessed through the MR, such as searching and reselecting to the second cell.

[0363] Optionally, the cell reselection is performed by the LR or the cell reselection is performed by the MR.

[0364] S606: The terminal turns off the MR or switches the MR to a sleep state.

[0365] In some cases, if the terminal performs cell reselection via the LR, the terminal can perform a residency determination on the MR. If the MR determines that the residency determination has failed, the terminal can shut down the MR or put it into a sleep state. That is, after S603, if the MR determines that the residency determination has failed (the second condition is met), it directly executes S606 (shutting down the MR) and performs cell reselection via the LR. This eliminates the need to wait for cell reselection before shutting down or putting the MR into a sleep state, thereby reducing terminal power consumption.

[0366] Alternatively, if the terminal performs cell reselection through the MR, then after S603, if the MR determines that the stay determination fails, the cell reselection is first performed through the MR, and then S606 is performed (turning off the MR or switching to a sleep state), which can minimize unnecessary wake-up time of the MR and reduce additional power consumption overhead.

[0367] In the embodiments of the present application, a terminal using the LP-WUS mechanism can periodically or event-triggeredly wake up the MR and perform a residency determination through the MR. This allows the terminal to select another cell that can be resided or accessed if the current cell is unavailable for residency or access. This prevents the terminal from residing in a cell that does not send a paging message to the terminal, which results in the terminal being unable to be paged. Furthermore, this prevents the terminal from attempting to enter a connected state directly in an inaccessible cell, which could result in a connection failure or failure to establish or restore a connection, thus impacting the terminal's service performance.

[0368] It should be understood that in the above embodiments, the terminal and / or network device can perform some or all of the steps in each embodiment. These steps or operations are merely examples, and the embodiments of the present application can also perform other operations or variations of various operations. In addition, each step can be performed in the different orders presented in each embodiment, and it is possible not to perform all the operations in the embodiments of the present application. Moreover, the size of the sequence number of each step does not mean the order of execution, and the execution order of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0369] Figure 15 is an example of another structural diagram of a communication device provided in an embodiment of the present application. The communication device can perform the functions of the terminal device in the communication method of the embodiment of the present application. For ease of illustration, Figure 15 only shows the main components of the communication device.

[0370] As shown in FIG15 , the communication device 900 includes a main circuit (MR) and a low power consumption circuit (LR).

[0371] Optionally, the MR includes a transceiver module 901a and a processing module 902a. The LR includes a transceiver module 901b and a processing module 902b.

[0372] The processing module 902a in the MR may include at least one of a central processing unit (CPU), an application processor (AP), or a communication processor (CP), or may be a functional module integrated into any of the aforementioned processors, or may be a module with other processing functions. This embodiment of the present application does not limit the specific implementation form of the processing module. The processing module 902a may perform operations or data processing related to the control and / or communication of at least one of the other components of the user communication device. Similarly, the processing module 902b in the LR may perform operations or data processing related to the control and / or communication of at least one of the other components of the user communication device.

[0373] The storage module 1303 may include a volatile memory and / or a non-volatile memory. The storage module is used to store at least one related instruction or data of other modules of the device.

[0374] The transceiver module 901a in the MR is used to support the device to communicate with other devices (via a communication network). For example, the communication module can be connected to the network via wireless communication or wired communication to communicate with other devices. The wireless communication can adopt at least one of cellular communication protocols, such as Long Term Evolution (LTE), Advanced Long Term Evolution (LTE-A), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Universal Mobile Telecommunications System (UMTS), Wireless Broadband (WiBro), or Global System for Mobile Communications (GSM). Wireless communication may include, for example, short-range communication. Short-range communication may include at least one of Wireless Fidelity (Wi-Fi), Bluetooth, Near Field Communication (NFC), Magnetic Stripe Transmission (MST), or GNSS. Similarly, the transceiver module 901b in the MR is used to support the communication device 900 to communicate with other devices.

[0375] An embodiment of the present application also provides a chip system, as shown in Figure 16, which includes at least one processor 1401 and at least one interface circuit 1402. The processor 1401 and the interface circuit 1402 can be interconnected via lines. For example, the interface circuit 1402 can be used to receive signals from other devices (such as a memory of a communication device). For another example, the interface circuit 1402 can be used to send signals to other devices (such as the processor 1401). Exemplarily, the interface circuit 1402 can read instructions stored in the memory and send the instructions to the processor 1401. When the instruction is executed by the processor 1401, the communication device can perform the various steps in the above embodiments. Of course, the chip system can also include other discrete devices, which is not specifically limited in the embodiment of the present application.

[0376] An embodiment of the present application also provides a computer storage medium, which includes computer instructions. When the computer instructions are executed on the above-mentioned communication device, the communication device executes the various functions or steps executed by the mobile phone in the above-mentioned method embodiment.

[0377] The embodiment of the present application further provides a computer program product, which, when executed on a computer, enables the computer to execute the functions or steps executed by the mobile phone in the above method embodiment.

[0378] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0379] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of modules or 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 device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0380] Units described as separate components may or may not be physically separate, and components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0381] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0382] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0383] The above content is only a specific embodiment of this application, but the scope of protection of this application is not limited to this. Any changes or replacements 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 communication method, characterized in that: include: receiving first information, wherein the first information is used for residence determination; According to the first information, a residence determination is performed by the main circuit MR and / or the low power consumption circuit LR; The camping determination includes: determining whether the terminal can camp on or access the first cell, and / or determining whether the capability of the terminal complies with the configuration of the first cell.

2. The method according to claim 1, characterized in that The method further comprises: If the first condition is met, residing in or accessing the first cell; The first condition includes at least one of the following conditions: the first cell can be camped by the terminal, the first cell can be accessed by the terminal, and the capability of the terminal complies with the configuration of the first cell.

3. The method according to claim 1, characterized in that The method further comprises: If the second condition is met, cell reselection is performed; The second condition includes at least one of the following conditions: the first cell cannot be camped by the terminal, the first cell cannot be accessed by the terminal, and the capability of the terminal does not conform to the configuration of the first cell.

4. The method according to claim 3, characterized in that Also includes: Access a second cell, where the second cell is a cell determined for performing cell reselection.

5. The method according to claim 3 or 4, characterized in that: Accessing the second cell includes: If the terminal is in an inactive state, and the second cell belongs to a notification area RNA based on a radio access network of the terminal, sending a radio resource control RRC recovery request message to the second cell, where the RRC recovery request message is used to restore a connection with the second cell; Alternatively, if the terminal is in an inactive state and the second cell does not belong to the RNA of the terminal, sending an RRC establishment request message to the second cell, where the RRC establishment request message is used to request establishment of a connection with the second cell; Alternatively, if the terminal is in an idle state, an RRC establishment request message is sent to the second cell, where the RRC establishment request message is used to request to establish a connection with the second cell.

6. The method according to claim 3 or 4, characterized in that: Accessing the first cell includes: If the terminal is in an inactive state and the first cell belongs to a notification area RNA based on a radio access network of the terminal, sending a radio resource control RRC recovery request message to the first cell, where the RRC recovery request message is used to restore a connection with the first cell; Alternatively, if the terminal is in an inactive state and the first cell does not belong to the RNA of the terminal, sending an RRC establishment request message to the first cell, where the RRC establishment request message is used to request establishment of a connection with the first cell; Alternatively, if the terminal is in an idle state, an RRC establishment request message is sent to the first cell, where the RRC establishment request message is used to request to establish a connection with the first cell.

7. The method according to any one of claims 1 to 6, characterized in that: According to the first information, the main circuit MR or the low power circuit LR performs a residence determination, including: A residence decision is performed by the MR according to the first information.

8. The method according to claim 7, characterized in that The method further comprises: Determine the cell change information by the LR; the cell change information includes at least one of the following information: information on whether the cell has changed, information on the currently resident cell, and information on the resident or accessed cell; Sending the cell change information to the MR through the LR; The performing of the residence determination according to the first information by the MR includes: performing the residence determination according to the first information by the MR according to the cell change information.

9. The method according to claim 7 or 8, characterized in that: Performing a residency determination according to the first information by the MR includes: if a third condition is met, performing a residency determination according to the first information by the MR; The third condition includes at least one of the following conditions: the terminal has not performed a residence decision on the first cell, the time interval between the last time the terminal performed a residence decision on the first cell exceeds a threshold, and the terminal leaves the first cell after performing a residence decision on the first cell.

10. The method according to any one of claims 1 to 6, characterized in that: Receiving first information, including: The first information is received by the LR, wherein the first information includes at least one of the following information: cell barring indication information, Specific same-frequency reselection indication information, half-duplex indication, public land mobile network PLMN information, cell special use indication information, tracking area information, frequency band information, spectrum emission requirement information, carrier bandwidth, bandwidth part BWP information, frequency offset indication information; According to the first information, the main circuit MR or the low power circuit LR performs a residence determination, including: The LR performs a residence decision according to the first information.

11. The method according to claim 10, characterized in that Perform cell reselection, including: The cell reselection is performed by the MR, or the cell reselection is performed by the LR.

12. The method according to any one of claims 1 to 6, characterized in that: According to the first information, the main circuit MR and the low power circuit LR perform a residence determination, including: Performing a residency decision according to the second information by the LR; performing a residency decision according to the third information by the MR; Alternatively, the MR performs a residency decision according to the second information; the LR performs a residency decision according to the third information; The second information is part of the first information, and the third information includes information in the first information except the second information.

13. The method according to claim 12, characterized in that The second information includes at least one item of information: cell prohibition indication information, specific same-frequency reselection indication information, half-duplex indication, public land mobile network PLMN information, cell special use indication information, and tracking area information; the third information includes at least one item of the following information: frequency band information, spectrum emission requirement information, carrier bandwidth, bandwidth part BWP information, and frequency offset indication information.

14. The method according to any one of claims 1 to 13, characterized in that: Residing in or accessing the first cell includes: The first cell is camped on or accessed through the MR.

15. The method according to claim 4, characterized in that Accessing the second cell includes: Access the second cell through the MR.

16. The method according to any one of claims 1 to 15, characterized in that: Also includes: awakening the MR; Performing a residency determination by the MR according to the first information includes: performing a residency determination by the awakened MR according to the first information.

17. The method according to claim 16, characterized in that Also includes: receiving a wake-up signal, where the wake-up signal is used to page the terminal; Waking up the MR includes: waking up the MR according to the wake-up signal.

18. The method according to claim 16, characterized in that Waking up the MR includes: waking up the MR when data transmission is performed or a service is executed.

19. The method according to any one of claims 1 to 18, characterized in that: Perform cell reselection, including: If the second condition is met according to any one or more of the cell prohibition indication information, the specific same-frequency reselection indication information, the half-duplex indication, the public land mobile network PLMN information, the cell special use indication information, and the tracking area information, then after the camp determination, the cell reselection is performed; or, if the second condition is satisfied according to any one or more of the frequency band information, the spectrum emission requirement information, the carrier bandwidth, the bandwidth part BWP information, and the frequency offset indication information, performing cell reselection after receiving a paging for the terminal, or when transmitting data, or when executing a service; The second condition includes at least one of the following conditions: the first cell cannot be camped by the terminal, the first cell cannot be accessed by the terminal, and the capability of the terminal does not conform to the configuration of the first cell.

20. The method according to any one of claims 1 to 6, characterized in that: The residency decision is performed by the main circuit MR and / or the low power circuit LR, including: Periodically waking up the MR and performing a residency decision through the MR; Or, the MR is woken up by an event triggering the MR to perform a residency decision; the event includes at least one of the following: data to be transmitted, measurement to be performed, service to be performed, reception of a wake-up signal, reference signal quality below a threshold, wake-up signal decoding failure, reference signal decoding failure, system information update indication, earthquake and tsunami warning ETWS, commercial mobile alert CMAS.

21. The method according to claim 20, characterized in that Also includes: If the first condition is met, shutting down the MR or switching the MR to a sleep state; The first condition includes at least one of the following conditions: the second cell can be camped by the terminal, the second cell can be accessed by the terminal, and the capability of the terminal complies with the configuration of the second cell.

22. The method according to claim 20, characterized in that Also includes: If the second condition is met, performing cell reselection through the MR; Turning off the MR or switching the MR to a sleep state; The second condition includes at least one of the following conditions: the second cell cannot be camped by the terminal, the second cell cannot be accessed by the terminal, and the capability of the terminal does not conform to the configuration of the second cell.

23. The method according to claim 20, characterized in that Also includes: If the second condition is met, shutting down the MR or switching the MR to a sleep state; performing cell reselection by the LR; The second condition includes at least one of the following conditions: the second cell cannot be camped by the terminal, the second cell cannot be accessed by the terminal, and the capability of the terminal does not conform to the configuration of the second cell.

24. A communication device, characterized in that: The communication device comprises means for performing the method according to any one of claims 1-23.

25. A communication device, characterized in that: The communication device comprises a processor configured to execute the method according to any one of claims 1-23.

26. A computer-readable storage medium, characterized in that: The computer-readable storage medium comprises instructions, and when the instructions are executed by a processor, the method according to any one of claims 1 to 23 is implemented.

27. A computer program product, characterized in that The computer program product comprises instructions, and when the instructions are executed by a processor, the method according to any one of claims 1 to 23 is implemented.

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