Communication method and apparatus

Abstract

The present application relates to a communication method and apparatus. A terminal executes a first AIoT service, wherein the terminal accesses a first cell; during executing the first AIoT service, the terminal sends a first message to a second access network device, wherein the first message is used for continuing or re-establishing an RRC connection; and the terminal determines whether to continue executing the first AIoT service. For example, if the terminal determines to continue executing the first AIoT service, the terminal can continue executing the first AIoT service; or if the terminal determines not to execute the first AIoT service, the terminal can stop executing or no longer execute the first AIoT service. In view of the above, embodiments of the present application provide an AIoT service processing mode in a scenario where a terminal switches an access network device, which clarifies the behavior of the terminal.

Description

Communication method and apparatus

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202411401654.5, filed on September 30, 2024, and entitled "A communication method and apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, and in particular to a communication method and apparatus. BACKGROUND

[0004] With the development of communication technology, the 3rd generation partnership project (3GPP) defines ambient internet of things (A-IoT or AIoT) technology.

[0005] An AIoT device can perform AIoT services with a reader (A-IoT-enabled UE), for example, a network device or a terminal can act as an A-IoT-enabled UE. In the scenario where the terminal acts as an A-IoT-enabled UE, the terminal can access a corresponding base station, for example, the terminal is in a radio resource control (RRC) connected state under the base station.

[0006] In the AIoT service execution, the terminal can occur cell selection or cell reselection. After the terminal occurs cell selection or cell reselection, how to handle the AIoT service is not yet determined. SUMMARY

[0007] Embodiments of the present application provide a communication method and apparatus for providing a processing mode capable of improving AIoT service continuity.

[0008] In a first aspect, a first communication method is provided, which can be applied to a first device. The first device is, for example, a terminal-side device, which is also referred to as a terminal device or a terminal. The terminal device is, for example, a terminal equipment, or another device including a terminal equipment function, or a circuit, or a chip system (or a chip, such as a modem chip, also referred to as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip containing a modem core, or another functional module capable of realizing the function of a terminal equipment, which is, for example, arranged in a terminal equipment. The method comprises: performing a first AIoT service, wherein the terminal accesses a first access network device; in the execution of the first AIoT service, sending a first message to a second access network device, the first message being used to continue or re-establish an RRC connection; and determining whether to continue to perform the first AIoT service. The first cell is, for example, a cell under the first access network device, such as a cell provided or controlled by the first access network device.

[0009] In the embodiments of the present application, in the execution of the first AIoT service, if the terminal requests to continue or re-establish an RRC connection with the second access network device, the terminal can determine whether to continue to perform the first AIoT service. For example, if the terminal determines to continue to perform the first AIoT service, the first AIoT service can be continued to be performed; or if the terminal determines not to perform the first AIoT service, the first AIoT service can be stopped to be performed or not to be performed any more. It can be seen that the embodiments of the present application provide a processing manner for an AIoT service in a scenario where a terminal changes an access network device, and the behavior of the terminal is defined.

[0010] In an optional implementation, the method further comprises: if it is determined to continue to perform the first AIoT service, sending data and / or signaling corresponding to the first AIoT service to the second access network device or a first core network device, the first core network device being a core network device serving the second access network device, or the first core network device being a core network device connected by the second access network device. If the terminal continues to perform the first AIoT service, one or more of a message, data or signaling corresponding to the first AIoT service can be sent to the second access network device or the first core network device, so that the network can obtain the relevant information of the first AIoT service.

[0011] In an optional implementation, the performing the first AIoT service comprises one or more of the following: reporting data and / or signaling corresponding to the first AIoT service; or, transmitting, with an AIoT device, data and / or signaling corresponding to the first AIoT service. For example, the terminal transmitting, with an AIoT device, information related to the first AIoT service, and / or the terminal transmitting, with a network device (including an access network device and / or a core network device), information related to the first AIoT service, can be included in the process of the terminal performing the first AIoT service.

[0012] In an optional implementation, the determining whether to continue performing the first AIoT service comprises: determining whether to continue performing the first AIoT service according to a first region, the first region being determined according to first information, the first information being preconfigured; and / or, determining whether to continue performing the first AIoT service according to a first power, the first power being a remaining power of the terminal. For example, if the terminal is located in the first region, the first AIoT service can be continued to be performed, and if the terminal is not located in the first region, the first AIoT service can not be performed. For another example, if the first power is sufficient, the terminal can continue to perform the first AIoT service, otherwise, the terminal can not perform the first AIoT service, so as to avoid that the first AIoT service is forced to be terminated due to insufficient power of the terminal in the process of performing the first AIoT service.

[0013] In an optional implementation, the method further comprises: receiving first information, the first information being used to indicate whether to continue performing the first AIoT service. For example, the terminal can determine whether to perform the first AIoT service according to the first information, without having to judge by itself according to a power or the like, so as to simplify the implementation of the terminal.

[0014] In an optional implementation, before receiving the first information, the method further comprises: sending, to the second access network device, sixth information, the sixth information being used to request whether to continue performing the first AIoT service; or, sending, to a first core network device, seventh information, the seventh information being used to request whether to continue performing the first AIoT service, the first core network device being a core network device serving the second access network device, or the first core network device being a core network device connected by the second access network device. For example, the terminal can inquire from the second access network device or the first core network device whether to continue performing the first AIoT service, or it can be understood that different network elements can determine whether to continue performing the first AIoT service according to the embodiments of the present application, which is more flexible.

[0015] In an optional implementation, the method further includes: sending, to the second access network device, information of a first area and / or a first identifier, the first area being related to the first AIoT service, the first area being used by the second access network device to determine whether to continue to perform the first AIoT service, and the first identifier being used to indicate the first AIoT service. For example, the terminal can send the information of the first area to the second access network device, so that the second access network device can determine whether to continue to perform the first AIoT service according to the first area. Or the first message can also not include the information of the first area, for example, the terminal does not send the information of the first area to the second access network device, and the second access network device can obtain the information of the first area from the first core network device, and no limitation is made in this regard.

[0016] In an optional implementation, the method further includes: receiving third information, the third information being used to indicate a first radio bearer, the first radio bearer being used to transmit data and / or signaling corresponding to the AIoT service. For example, the network can configure a radio bearer for the terminal, the radio bearer being used to transmit the first AIoT service, so that the first AIoT service can not occupy a bearer of other services.

[0017] In an optional implementation, the method further includes: receiving eighth information, the eighth information being used to indicate a first resource, the first resource being used by the terminal to transmit data and / or signaling corresponding to the first AIoT service with an AIoT device. For example, the second access network device can configure the first resource for the terminal, so that the terminal and the AIoT device can transmit one or more of messages, data, or signaling corresponding to the first AIoT service.

[0018] In a second aspect, a second communication method is provided, which can be applied to a second device. The second device is, for example, a terminal-side device, which is also referred to as a terminal device or a terminal. The terminal device can be introduced with reference to the first aspect. The method includes: performing a first AIoT service, wherein the terminal accesses a first access network device; receiving second information during the performance of the first AIoT service, the second information being used to indicate whether a second access network device has an AIoT capability; if the second access network device does not have the capability, sending a ninth message to a third access network device, the ninth message being used to continue or re-establish an RRC connection, wherein the third access network device has the capability; determining whether to continue to perform the first AIoT service; or, if the second access network device does not have the capability, sending a first message to the second access network device, and releasing or storing data corresponding to the first AIoT service, the ninth message being used to continue or re-establish the RRC connection.

[0019] In the execution of the first AIoT service, if the terminal requests the access network device without AIoT capability to continue or re-establish the RRC connection, the behavior of the terminal is not clear, for example, the terminal cannot determine whether the first AIoT service continues to be executed, nor can it determine how the information related to the first AIoT service should be processed. In this case, the terminal may have problems such as data transmission errors. To this end, the embodiments of the present application make the terminal clear whether the second access network device has AIoT capability through the second information of the access network device, so that the behavior of the terminal is clear, the data transmission of the terminal can be ensured to be accurate, and the continuity of the AIoT service can be improved.

[0020] In an optional implementation, the releasing the data corresponding to the first AIoT service comprises: if the terminal does not access the access network device with AIoT capability when the first time length arrives, releasing the data. The terminal can wait for a first time length, and if the terminal accesses the access network device with AIoT capability within the first time length, the terminal can optionally determine whether to continue to execute the first AIoT service, and the terminal can optionally not release the data corresponding to the first AIoT service, for example, if it is determined to continue to execute the first AIoT service, the terminal can send the data corresponding to the first AIoT service to the access network device with AIoT capability, etc., which can reduce the amount of packet loss.

[0021] In an optional implementation, after storing the data corresponding to the first AIoT service, the method comprises: receiving fourth information indicating that a fourth access network device has the capability; sending a tenth message to the fourth access network device, the tenth message being used to continue or re-establish the RRC connection; and determining whether to continue to execute the first AIoT service. After storing the data corresponding to the first AIoT service, if the terminal searches for the fourth access network device with AIoT capability, it can be determined whether to continue to execute the first AIoT service, thereby improving the continuity of the first AIoT service.

[0022] In an optional implementation, the method further comprises: if the second access network device has the capability, sending the data to the second access network device. If the second access network device has AIoT capability, the terminal can send one or more of the messages, data or signaling corresponding to the first AIoT service to the second access network device.

[0023] In a third aspect, a third communication method is provided, which can be applied to a third device. The third device is, for example, a network side device, which is also referred to as a network device. The network device is, for example, a network equipment, or other equipment including the function of the network equipment, or a circuit, or a chip system (or chip) or other functional module capable of implementing the function of the network equipment, which is, for example, arranged in the network equipment. The network equipment can be a non-ORAN architecture or an ORAN architecture; or the network equipment can be a CU, a DU or a RU under the ORAN architecture. The network equipment is, for example, located on the ground, or the network equipment is, for example, a non-ground device such as a satellite or an aerial vehicle, or is located on a non-ground device such as a satellite or an aerial vehicle. The network device is, for example, a second access network device. The method comprises: receiving sixth information, the sixth information being used to request whether to continue to execute a first AIoT service; and sending second information, the second information being used to indicate whether to continue to execute the first AIoT service.

[0024] In an optional implementation, the method further comprises: receiving fourth information from the terminal or the first access network device, the fourth information being used to indicate a first area, the first area being related to the first AIoT service, and the first area being used to determine whether to continue to execute the first AIoT service.

[0025] In an optional implementation, the method further comprises: sending ninth information to the first access network device, the ninth information being used to request whether to continue to execute the first AIoT service; and receiving tenth information from the first access network device, the tenth information being used to indicate whether to continue to execute the first AIoT service. In this implementation, whether to continue to execute the first AIoT service can be determined by the first access network device.

[0026] In an optional implementation, the method further comprises: sending third information, the third information being used to indicate a first radio bearer, the first radio bearer being used to transmit data and / or signaling corresponding to the AIoT service.

[0027] In an optional implementation, the method further comprises: receiving fifth information, the fifth information being used to indicate that the terminal is authorized as a reader / writer of the first AIoT service.

[0028] In an optional implementation, the method further comprises: if the second information indicates to continue to execute the first AIoT service, receiving data and / or signaling corresponding to the first AIoT service.

[0029] As to the technical effects brought by the third aspect or the partial optional implementation of the third aspect, reference can be made to the introduction of the technical effects of the first aspect or the corresponding implementation, and / or the introduction of the technical effects of the second aspect or the corresponding implementation.

[0030] In a fourth aspect, a fourth communication method is provided, which can be applied to a fourth apparatus. The fourth apparatus is, for example, a network side apparatus, which is also referred to as a network apparatus. The introduction of the network apparatus can be referred to the third aspect. Optionally, the fourth apparatus is, for example, a first core network device. The method comprises: receiving seventh information, the seventh information being used for requesting whether to continue to perform a first AIoT service; and sending eleventh information, the eleventh information being used for indicating whether to continue to perform the first AIoT service.

[0031] In an optional implementation, the method further comprises: sending fifth information, the fifth information being used for indicating that a terminal is authorized as a reader-writer of the first AIoT service.

[0032] In an optional implementation, the method further comprises: sending, to a first access network device, a fifth message, the fifth message comprising a NAS message and comprising first indication information, the first indication information being used for indicating the first AIoT service.

[0033] In an optional implementation, the method further comprises: if the eleventh information indicates to continue to perform the first AIoT service, receiving data and / or signaling corresponding to the AIoT service.

[0034] As to the technical effects brought by the fourth aspect or the partial optional implementation of the fourth aspect, reference can be made to one or more of the following: the introduction of the technical effects of the first aspect or the corresponding implementation, the introduction of the technical effects of the second aspect or the corresponding implementation, or the introduction of the technical effects of the third aspect or the corresponding implementation.

[0035] In a fifth aspect, a fifth communication method is provided, which can be applied to a fifth apparatus. The fifth apparatus is, for example, a network side apparatus, which is also referred to as a network apparatus. The introduction of the network apparatus can be referred to the third aspect. Optionally, the fifth apparatus is, for example, a first access network device. The method comprises: receiving ninth information from a second access network device, the ninth information being used for requesting whether to continue to perform a first AIoT service, wherein the second access network device is an access network device currently camped by a terminal; and sending, to the second access network device, tenth information, the tenth information being used for indicating whether to continue to perform the first AIoT service.

[0036] In an optional implementation, the method further includes: receiving a fifth message, the fifth message including a NAS message and including first indication information, the first indication information being used to indicate the first AIoT service; and configuring AIoT radio resources for the terminal according to the first indication information.

[0037] As to the technical effects brought by the fifth aspect or the optional implementation of the fifth aspect, reference can be made to one or more of the following: the introduction of the technical effects of the first aspect or the corresponding implementation, the introduction of the technical effects of the second aspect or the corresponding implementation, or the introduction of the technical effects of the third aspect or the corresponding implementation.

[0038] The sixth aspect provides a sixth communication method, which can be applied to a sixth device. The sixth device is, for example, a terminal-side device, which is also referred to as a terminal device or a terminal. Reference can be made to the introduction of the terminal device in the first aspect. The method includes: performing a first AIoT service, wherein the terminal accesses a first access network device; during the performance of the first AIoT service, an RLF or a reconfiguration failure or an integrity check failure occurs; and stopping the performance of the first AIoT service.

[0039] In the embodiments of the present application, if the terminal has an RLF or a reconfiguration failure or an integrity check failure, the terminal can stop the first AIoT service that is being performed, so as to reduce the probability of the first AIoT service error.

[0040] In an optional implementation, the method further includes: releasing the configuration corresponding to the first AIoT service and / or releasing a first context of the terminal, the first context being used for the terminal to transmit the first AIoT service with an AIoT device. Since the terminal has stopped the performance of the first AIoT service, the configuration related to the first AIoT service can be released, so as to save the storage space of the terminal.

[0041] In an optional implementation, the configuration includes a configuration of AIoT radio resources used to transmit information of the first AIoT service. The AIoT radio resources are, for example, used to transmit one or more of messages, data or signaling of the first AIoT service between the terminal and an AIoT device.

[0042] In an optional implementation, the method further includes: entering a second cell through cell selection or reselection; and initiating RRC re-establishment in the second cell. The terminal can perform cell selection or cell reselection, so as to recover the communication of the terminal.

[0043] In a seventh aspect, a seventh method for communication is provided, which can be applied to the seventh apparatus. The seventh apparatus is, for example, a terminal-side apparatus, which is also referred to as a terminal apparatus or a terminal. The terminal apparatus can refer to the first aspect. The method comprises: performing a first AIoT service, wherein the terminal accesses a first access network device; during the performing of the first AIoT service, an RLF or a reconfiguration failure or an integrity check failure occurs; and suspending the first AIoT service.

[0044] In the embodiments of the present application, if the terminal has an RLF or a reconfiguration failure or an integrity check failure, the terminal can suspend the first AIoT service being performed, so as to reduce the probability of the first AIoT service error. Moreover, the terminal only suspends the first AIoT service, and does not release the first AIoT service. When the first AIoT service can be continued to be performed, the first AIoT service can be timely resumed, so as to improve the execution efficiency and continuity of the first AIoT service.

[0045] In an optional implementation, the method further comprises: suspending a configuration corresponding to the first AIoT service, and suspending a first context of the terminal. The terminal can suspend the configuration related to the first AIoT service without releasing the configuration, so as to facilitate the recovery of the configuration, improve the execution efficiency of the first AIoT service, and reduce the configuration overhead.

[0046] In an optional implementation, the configuration comprises a configuration of AIoT radio resources for transmitting information of the first AIoT service.

[0047] In an optional implementation, the method further comprises: entering a second cell through cell selection or reselection; initiating RRC re-establishment in the second cell; and receiving an eleventh message from the second cell, the eleventh message being used to indicate to resume the first AIoT service, or to stop performing the first AIoT service, or to indicate a configuration corresponding to the first AIoT service. The terminal can perform cell selection or reselection to resume communication. For example, the terminal enters the second cell, and can perform corresponding processing on the first AIoT service according to the indication of the second cell.

[0048] In an eighth aspect, an eighth communication method is provided, which can be applied to the eighth apparatus. The eighth apparatus is, for example, a terminal-side apparatus, which is also referred to as a terminal apparatus or a terminal. The terminal apparatus can refer to the first aspect. The method comprises: performing a first AIoT service, wherein the terminal accesses a first access network device; during the performance of the first AIoT service, an RLF or a reconfiguration failure or an integrity check failure occurs; performing cell selection or reselection to enter a second cell; and if the second cell is the first cell, continuing to perform the first AIoT service.

[0049] In an optional implementation, the method further comprises: if the second cell is a different cell from the first cell, stopping the performance of the first AIoT service or suspending the first AIoT service.

[0050] If the terminal has an RLF or a reconfiguration failure or an integrity check failure during the performance of the first AIoT service, the terminal can perform cell selection or cell reselection. If the terminal does not change the cell and / or the access network device through the cell selection or the cell reselection, the terminal can continue to perform the first AIoT service, so as to improve the continuity of the first AIoT service. If the terminal changes the cell and / or the access network device through the cell selection or the cell reselection, the terminal can stop or suspend the first AIoT service, so as to reduce the probability of the error of the first AIoT service.

[0051] In a ninth aspect, a ninth communication method is provided, which can be applied to a ninth apparatus. The ninth apparatus is, for example, a terminal-side apparatus, which is also referred to as a terminal apparatus or a terminal. The terminal apparatus can refer to the first aspect. The method comprises: performing a first AIoT service, wherein the terminal accesses a first access network device; during the performance of the first AIoT service, an RLF or a reconfiguration failure or an integrity check failure occurs, and a first timer is started; and during the running of the first timer, the first AIoT service is continued to be performed.

[0052] In the embodiments of the present application, if the terminal has an RLF or a reconfiguration failure or an integrity check failure, the UE can still perform the first AIoT service during the running of the first timer, so as to improve the continuity of the first AIoT service.

[0053] In an optional implementation, the method further includes: during the running of the first timer, performing cell selection or reselection to enter a second cell; initiating RRC reestablishment in the second cell; after the RRC reestablishment succeeds, receiving first configuration information in the second cell; and performing the first AIoT service according to the first configuration information. If the terminal enters the second cell during the running of the first timer, the RRC reestablishment can be initiated in the second cell to communicate in the second cell. In this case, the terminal can perform the first AIoT service according to the corresponding configuration of the second cell, and the continuity of the first AIoT service can be improved.

[0054] In an optional implementation, the method further includes: if the first timer expires, stopping the execution of the first AIoT service or suspending the first AIoT service. When the first timer stops or expires, the terminal can stop or suspend the first AIoT service, so that the execution time of the first AIoT service is more reasonable.

[0055] In a tenth aspect, a communication apparatus is provided. The communication apparatus can be the terminal-side apparatus of any one of the first aspect, the second aspect, or the sixth aspect to the ninth aspect. The communication apparatus has the functions of the terminal-side apparatus. For example, the communication apparatus has the functions of any one of the first aspect, the second aspect, or the sixth aspect to the ninth aspect, and can include modules or units or means corresponding to the operations of any one of the first aspect, the second aspect, or the sixth aspect to the ninth aspect. The modules or units or means can be implemented in software, hardware, or a combination of software and hardware. The communication apparatus can be, for example, a terminal device, another device including a terminal device function, a chip system (or a chip or a circuit) or another functional module that can implement the functions of a terminal device, and the chip system or the functional module can be arranged in a terminal device. In an optional implementation, the communication apparatus includes a baseband device and a radio frequency device. In another optional implementation, the communication apparatus includes a processing unit (also referred to as a processing module) and a transceiver unit (also referred to as a transceiver module). The transceiver unit can implement a sending function and a receiving function. When the transceiver unit implements the sending function, it can be referred to as a sending unit (also referred to as a sending module). When the transceiver unit implements the receiving function, it can be referred to as a receiving unit (also referred to as a receiving module). The sending unit and the receiving unit can be the same functional module, which is referred to as a transceiver unit and can implement the sending function and the receiving function. Alternatively, the sending unit and the receiving unit can be different functional modules, and the transceiver unit refers to these functional modules in general.

[0056] In an optional implementation, the processing unit is configured to perform a first AIoT service, wherein the terminal accesses a first access network device; the transceiver (or the sending unit) is configured to, in the performance of the first AIoT service, send a first message to a second access network device, the first message being used to continue or re-establish an RRC connection; and the processing unit is further configured to determine whether to continue performing the first AIoT service.

[0057] In an optional implementation, the processing unit is configured to perform a first AIoT service, wherein the terminal accesses a first access network device; the transceiver (or the receiving unit) is configured to, in the performance of the first AIoT service, receive second information, the second information being used to indicate whether a second access network device has an AIoT capability; if the second access network device does not have the capability, the transceiver (or the sending unit) is configured to send a ninth message to a third access network device, the ninth message being used to continue or re-establish an RRC connection, wherein the third access network device has the capability; and the processing unit is further configured to determine whether to continue performing the first AIoT service; or the transceiver (or the sending unit) is configured to send a first message to the second access network device, and release or store data corresponding to the first AIoT service, the ninth message being used to continue or re-establish an RRC connection.

[0058] In an optional implementation, the processing unit is configured to perform a first AIoT service, wherein the terminal accesses a first access network device; the processing unit is further configured to, in the performance of the first AIoT service, determine that the terminal has an RLF, a reconfiguration failure, or an integrity check failure; and the processing unit is further configured to stop performing the first AIoT service.

[0059] In an optional implementation, the processing unit is configured to perform a first AIoT service, wherein the terminal accesses a first access network device; the processing unit is further configured to, in the performance of the first AIoT service, determine that the terminal has an RLF, a reconfiguration failure, or an integrity check failure; and the processing unit is further configured to suspend the first AIoT service.

[0060] In an optional implementation, the processing unit is configured to perform a first AIoT service, wherein the terminal accesses a first access network device; the processing unit is further configured to determine that the terminal has an RLF or a reconfiguration failure or an integrity check failure during the performance of the first AIoT service; the processing unit is further configured to perform cell selection or reselection to enter a second cell; and the processing unit is further configured to continue to perform the first AIoT service if the second cell is the first cell.

[0061] In an optional implementation, the processing unit is configured to perform a first AIoT service, wherein the terminal accesses a first access network device; the processing unit is further configured to determine that the terminal has an RLF or a reconfiguration failure or an integrity check failure during the performance of the first AIoT service, and start a first timer; and the processing unit is further configured to continue to perform the first AIoT service during the running of the first timer.

[0062] In an optional implementation, the communication apparatus further includes a storage unit (also referred to as a storage module), and the processing unit is configured to be coupled with the storage unit and execute programs or instructions in the storage unit to enable the communication apparatus to perform the functions of the terminal-side apparatus in any of the first aspect, the second aspect, or the fifth aspect to the ninth aspect.

[0063] In an eleventh aspect, a communication apparatus is provided. The communication apparatus can be the network-side apparatus in the third aspect or the fourth aspect or the fifth aspect. The communication apparatus has the functions of the network-side apparatus. For example, the communication apparatus has the functions of the third aspect or the fourth aspect or the fifth aspect, for example, the communication apparatus includes modules or units or means corresponding to the operations in the third aspect or the fourth aspect or the fifth aspect. The modules or units or means can be implemented in software, hardware or software in combination with hardware. The communication apparatus can be a network device, or another device with network device functions, or a chip system (or a chip or circuit) or another functional module. The chip system or functional module can have the functions of the network device, and can be arranged in the network device. In an optional implementation, the communication apparatus includes a baseband device and a radio frequency device. In another optional implementation, the communication apparatus includes a processing unit (also referred to as a processing module) and a transceiver unit (also referred to as a transceiver module). The transceiver unit can be implemented as described in the tenth aspect.

[0064] In an optional implementation, the transceiver (or the receiving unit) is configured to receive sixth information, where the sixth information is used to request whether to continue to perform the first AIoT service; and the transceiver (or the sending unit) is configured to send second information, where the second information is used to indicate whether to continue to perform the first AIoT service.

[0065] In an optional implementation, the transceiver (or the receiving unit) is configured to receive seventh information, where the seventh information is used to request whether to continue to perform the first AIoT service; and the transceiver (or the sending unit) is configured to send eleventh information, where the eleventh information is used to indicate whether to continue to perform the first AIoT service.

[0066] In an optional implementation, the transceiver (or the receiving unit) is configured to receive ninth information from a second access network device, where the ninth information is used to request whether to continue to perform the first AIoT service, and the second access network device is an access network device currently camped by the terminal; and the transceiver (or the sending unit) is configured to send tenth information to the second access network device, where the tenth information is used to indicate whether to continue to perform the first AIoT service.

[0067] In an optional implementation, the communication apparatus further includes a storage unit (also referred to as a storage module), and the processing unit is coupled to the storage unit and executes programs or instructions in the storage unit to enable the communication apparatus to perform the functions of the network-side device described in the third aspect or the fourth aspect or the fifth aspect.

[0068] In a twelfth aspect, a device is provided, which includes a memory and one or more processors. The memory is configured to store part or all of necessary computer programs or instructions for implementing the functions described in any of the first aspect, the second aspect, or any of the sixth aspect to the ninth aspect. The one or more processors can execute the computer programs or instructions, when the computer programs or instructions are executed, to cause the device to implement the method in any possible design or implementation manner in any of the first aspect, the second aspect, or any of the sixth aspect to the ninth aspect.

[0069] In a possible design, the device can further include interface circuitry, where the processor is configured to communicate with other devices or components through the interface circuitry.

[0070] In a possible design, the device can further include the memory.

[0071] The apparatus can be a terminal, or a communication module in the terminal, or a chip responsible for communication function in the terminal, such as a modem chip (also known as a baseband chip) or a SoC or SIP chip containing a modem module.

[0072] In a thirteenth aspect, an apparatus is provided, which includes a memory and one or more processors. The memory is configured to store part or all of the computer programs or instructions necessary to implement the functions involved in the third aspect or the fourth aspect or the fifth aspect described above. The one or more processors are configured to execute the computer programs or instructions, which, when executed, cause the apparatus to implement the method in any possible design or implementation manner of the third aspect or the fourth aspect or the fifth aspect described above.

[0073] In a possible design, the apparatus can further include an interface circuit, and the processor is configured to communicate with other apparatuses or components through the interface circuit.

[0074] In a possible design, the apparatus can further include the memory.

[0075] The apparatus can be a network device, or a communication module in the network device, or a chip responsible for communication function in the network device, such as a modem chip (also known as a baseband chip) or a SoC or SIP chip containing a modem module.

[0076] In a fourteenth aspect, a communication system is provided, which includes a second access network device, where the second access network device is configured to perform the method performed by the network-side apparatus in the third aspect described above. For example, the second access network device can be implemented by the apparatus in the eleventh aspect or the thirteenth aspect.

[0077] Optionally, the communication system further includes a first core network device, where the first core network device is configured to perform the method performed by the network-side apparatus in the fourth aspect described above. For example, the first core network device can be implemented by the apparatus in the eleventh aspect or the thirteenth aspect.

[0078] Optionally, the communication system further includes a first access network device, where the first access network device is configured to perform the method performed by the network-side apparatus in the fifth aspect described above. For example, the first access network device can be implemented by the apparatus in the eleventh aspect or the thirteenth aspect.

[0079] Optionally, the communication system further includes a terminal device, where the terminal device is configured to perform the method performed by the terminal apparatus in the first aspect described above. For example, the terminal device can be implemented by the apparatus in the sixth aspect or the eighth aspect.

[0080] In a fifteenth aspect, a communication system is provided, comprising a first access network device, wherein the first access network device is configured to perform the method performed by the network-side device in the fourth aspect. For example, the first access network device can be implemented by the apparatus in the seventh aspect or the ninth aspect.

[0081] Optionally, the communication system further comprises a first core network device, wherein the first core network device is configured to perform the method performed by the network-side device in the fifth aspect. For example, the first core network device can be implemented by the apparatus in the seventh aspect or the ninth aspect.

[0082] Optionally, the communication system further comprises a terminal device, wherein the terminal device is configured to perform the method performed by the terminal device in any one of the first aspect, the second aspect, or the sixth aspect to the ninth aspect. For example, the terminal device can be implemented by the apparatus in the tenth aspect or the twelfth aspect.

[0083] In a sixteenth aspect, a computer-readable storage medium is provided, which is configured to store a computer program or instructions, when the computer program or instructions are executed, causing the method performed by the network-side device or the terminal-side device in the above aspects to be implemented.

[0084] In a seventeenth aspect, a computer program product is provided, which comprises instructions, when the computer program or instructions are executed on a computer, causing the method in the above aspects to be implemented.

[0085] In an eighteenth aspect, a chip system is provided, comprising a processor and an interface, wherein the processor is configured to invoke and execute instructions from the interface, so that the chip system implements the method in the above aspects. BRIEF DESCRIPTION OF DRAWINGS

[0086] FIG. 1 and FIG. 2 are schematic diagrams of two structures of an access network device in embodiments of the present application;

[0087] FIG. 3 to FIG. 10 are schematic diagrams of several network architectures applied in embodiments of the present application;

[0088] FIG. 11 to FIG. 13 are schematic diagrams of several protocol stacks applied in embodiments of the present application;

[0089] FIG. 14 to FIG. 17 are several flowcharts of a communication method provided in embodiments of the present application;

[0090] FIG. 18 to FIG. 22 are flowcharts of several communication methods provided in embodiments of the present application;

[0091] FIG. 23 is a schematic diagram of an apparatus provided in embodiments of the present application;

[0092] FIG. 24 is a schematic diagram of another apparatus provided in embodiments of the present application. DETAILED DESCRIPTION

[0093] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the following will further describe the embodiments of the present application with reference to the drawings.

[0094] In the embodiments of the present application, the number of a noun, unless otherwise specified, represents "a singular noun or a plural noun", that is, "one or more". "At least one" means one or more, and "multiple" means two or more. "And / or" describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. For example, A / B represents A or B. "At least one of the following" or similar expressions means any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b, or c represents a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0095] The ordinal numbers "first", "second", and the like mentioned in the embodiments of the present application are used to distinguish a plurality of objects, and are not used to limit the size, content, order, time sequence, priority, or importance of the plurality of objects. In addition, the numbering of the steps in each embodiment introduced in the present application is only used to distinguish different steps, and is not used to limit the order of the steps.

[0096] The following explains some terms or concepts in the embodiments of the present application, so as to facilitate the understanding of those skilled in the art.

[0097] (1) In the embodiments of the present application, the terminal device is a device with wireless transceiving function, which can be a fixed device, a mobile device, a handheld device (such as a mobile phone), a wearable device, a vehicle-mounted device, or a wireless device (such as a communication module, a modem, or a chip system, etc.) built in the above devices. The terminal device is used to connect people, things, machines, etc., and can be widely used in various scenarios, such as but not limited to the following scenarios: sensing scenarios, cellular communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine / machine-type communications (M2M / MTC), internet of things (IoT), virtual reality (VR), augmented reality (AR), industrial control, self driving, remote medical, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, unmanned aerial vehicle, robot, indoor commercial scenarios (such as mobile phone screen projection, file sharing, mobile phone video transmission to VR glasses), etc. When the terminal device is applied to V2X, it can also be referred to as a V2X device, such as a smart car, a digital car, an unmanned car, a self-driving car, a pure EV, a hybrid electric vehicle (HEV), a range extended EV (REEV), a plug-in HEV (PHEV), a new energy vehicle, a road site unit (RSU), etc. The terminal device can also be a device in D2D communication, such as a water meter, a power meter, etc.

[0098] In addition, in the embodiments of the present application, the terminal device can also be a terminal device in an internet of things (IoT) system. The IoT is an important part of future information technology development, and its main technical feature is to connect objects through communication technology and network, so as to realize the intelligent network of man-machine interconnection and object-object interconnection.

[0099] As introduced above, various terminal devices can be considered as vehicle-mounted terminal devices if they are located on a vehicle (for example, placed in or installed in a vehicle), and the vehicle-mounted terminal device is also referred to as an on-board unit (OBU). The terminal device of the present application can also be a vehicle-mounted module, a vehicle-mounted module group, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit built in a vehicle as one or more components or units, and the vehicle can implement the method of the present application through the built-in vehicle-mounted module, vehicle-mounted module group, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit.

[0100] The terminal device can also be referred to as a UE, a terminal, an access station, a UE station, a remote station, a wireless communication device, or a user device, etc.

[0101] In the embodiments of the present application, the device for implementing the function of the terminal device can be a terminal device, which can be a terminal device or a device capable of supporting the terminal device to implement the function, such as a chip system, which can be installed in the terminal device. In the technical solutions provided in the embodiments of the present application, the device for implementing the function of the terminal device is taken as an example of the terminal device to describe the technical solutions provided in the embodiments of the present application.

[0102] (2) The network device in the embodiments of the present application, for example, includes an access network device (or an access network network element) and / or a core network device (or a core network network element). The access network device is a device with wireless transceiving function, used for communicating with the terminal device. The access network device includes but is not limited to a base station (a base transceiver station (BTS), a Node B, an evolved Node B (eNodeB) / eNB, or a next generation Node B (gNodeB) / gNB), a transmission reception point (TRP), a base station evolved in the future of the 3rd generation partnership project (3GPP), an access node in a wireless fidelity (Wi-Fi) system, a wireless relay node, a wireless backhaul node, and the like. The base station can be a macro base station, a micro base station, a pico base station, a micro base station, a relay station, and the like. A plurality of base stations can support a network of the same access technology or a network of different access technologies. A base station can include one or more co-sited or non-co-sited transmission reception points. The access network device can also be a wireless controller, a centralized unit (CU), and / or a distributed unit (DU) in a cloud radio access network (CRAN) scenario. The access network device can also be a server and the like. For example, the network device in the V2X technology can be a road side unit (RSU). The access network device is described below by taking a base station as an example. The base station can communicate with the terminal device or communicate with the terminal device through a relay station. The terminal device can communicate with a plurality of base stations in different access technologies. The core network device is used to implement mobile management, data processing, session management, policy and charging, and the like. The names of devices implementing core network functions in systems of different access technologies can be different, and the embodiments of the present application do not limit this.Taking a 5th generation (5G) system as an example, the core network device includes, for example, an access and mobility management function (AMF), a session management function (SMF), a policy control function (PCF), a user plane function (UPF), and the like.

[0103] In the CU-DU architecture, or in an open RAN (ORAN) system, the access network device can include one or more of a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), and the like. The CU and the DU can be separately arranged, or can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). For a structure of the access network device, refer to FIG. 1. The core network device and the access network device can communicate through a backhaul link; the CU and the DU in the access network device can communicate through a middlehaul link, and the DU and the RU can communicate through a front-haul link.

[0104] Alternatively, another structure of the access network device can refer to FIG. 2. FIG. 2 takes an example of the access network device being implemented by a chip, for example, referred to as a RAN chip. The RAN chip can include a CU, a DU, and a RU. The CU can perform L2 functions, L3 functions, and the like. The DU can perform L1 functions, part of L2 functions, and the like. The RU can perform calculation of L1 and radio frequency (RF) digital part functions, and the like. The CU communicates with the core network device through a backhaul interface. The backhaul interface carries traffic between the CU and the core network device. The CU can include a central processing unit (CPU) of an X86 architecture or an ARM architecture, and an accelerator including a field programmable gate array (FPGA), a graphics processing unit (GPU), or other accelerators, and the like. The CPU and the FPGA, GPU, or other accelerators can communicate through a peripheral component interconnect express (PCIe) interface.

[0105] The CU communicates with the DU through a midhaul interface. The midhaul interface carries traffic between the CU and the DU. The DU can include a CPU of an X86 architecture or an ARM architecture, and an accelerator including an FPGA, a GPU, or other accelerators, and the like. The CPU and the FPGA, GPU, or other accelerators can communicate through a PCIe interface.

[0106] The DU communicates with the RU through a fronthaul interface. The fronthaul interface carries traffic between the DU and the RU. If the access network device adopts an integrated DU, the integrated DU can include the functions of the DU and the RU described above, and the RAN can no longer separately include the RU. The RU can include a RAN fronthaul processing unit (RAN FH processing unit), a digital processing unit, and a radio frequency processing unit (RF processing unit). The RAN FH processing unit is implemented by, for example, an FPGA or an application specific integrated circuit (ASIC). The digital processing unit is implemented by, for example, an FPGA or an ASIC.

[0107] The RU can be connected with an antenna to communicate with the UE through the antenna.

[0108] The CU (or CU-CP and CU-UP), DU or RU can also have different names in different systems, but those skilled in the art can understand their meanings. For example, in an ORAN system, the CU can also be referred to as an open CU (O-CU), the DU can also be referred to as an open DU (O-DU), the CU-CP can also be referred to as an open CU-CP (O-CU-CP), the CU-UP can also be referred to as an open CU-UP (O-CU-UP), and the RU can also be referred to as an open RU (O-RU). For the convenience of description, the CU, CU-CP, CU-UP, DU and RU are taken as examples for description in the embodiments of the present application. Any one of the CU (or CU-CP, CU-UP), DU and RU in the embodiments of the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0109] The CU and the DU can be configured according to the protocol layer functions of the wireless network they implement. For example, the CU is configured to implement the functions of the packet data convergence protocol (PDCP) layer and the protocol layers above the PDCP layer (such as the radio resource control (RRC) layer and / or the service data adaption protocol (SDAP) layer, etc.); the DU is configured to implement the functions of the protocol layers below the PDCP layer (such as one or more of the radio link control (RLC) layer, the media access control (MAC) layer, or the physical (PHY) layer). For another example, the CU is configured to implement the functions of the PDCP layer and the protocol layers above the PDCP layer (such as the RRC layer and / or the SDAP layer), and the DU is configured to implement the functions of the protocol layers below the PDCP layer (such as one or more of the RLC layer, the MAC layer, or the PHY layer).

[0110] The configuration of the above CU and DU is merely an example, and the CU and DU can be configured to have functions as needed. For example, the CU or the DU can be configured to have more protocol layer functions, or the CU or the DU can be configured to have partial processing functions of the protocol layer. For example, partial functions of the RLC layer and functions of protocol layers above the RLC layer are arranged in the CU, and the remaining functions of the RLC layer and functions of protocol layers below the RLC layer are arranged in the DU. For another example, the functions of the CU or the DU can be divided according to a service type or other system requirements, for example, according to a delay requirement. Functions that require to meet a relatively short delay requirement in processing time are arranged in the DU, and functions that do not require to meet the delay requirement are arranged in the CU.

[0111] The DU and the RU can cooperate to jointly implement the functions of the PHY layer. One DU can be connected to one or more RUs. The functions of the DU and the RU can be configured in multiple ways according to design. For example, the DU is configured to implement baseband functions, and the RU is configured to implement intermediate radio frequency functions. For another example, the DU is configured to implement high-layer functions in the PHY layer, and the RU is configured to implement low-layer functions in the PHY layer or implement the low-layer functions and radio frequency functions. The high-layer functions in the PHY layer can include a part of functions of the PHY layer that are closer to the MAC layer, and the low-layer functions in the PHY layer can include another part of functions of the PHY layer that are closer to the intermediate radio frequency side.

[0112] In the embodiments of the present application, the device for implementing the function of the network device can be referred to as a network device, which can be a network element or a network device, or a device capable of supporting the network device or the network element to implement the function, such as a chip system, which can be installed in the network device. In the technical solutions provided in the embodiments of the present application, the device for implementing the function of the network device is taken as an example (for example, the device for implementing the function of the access network device is the access network device, and the device for implementing the function of the core network device is the core network device), and the technical solutions provided in the embodiments of the present application are described.

[0113] (3) AIoT technology.

[0114] With the development of communication technology, the 3GPP defines AIoT technology.

[0115] The devices in the AIoT technology can include network devices and first-type terminal devices, or in other words, the AIoT-based communication system can include network devices and first-type terminal devices. The first-type terminal devices can be terminal devices with the functions of AIoT devices, and can also be referred to as AIoT devices. In this case, the A-IoT-enabled UE and the AIoT device can both be implemented based on the infrastructure in the cellular network. In other words, the A-IoT-enabled UE and the AIoT device can both be devices in the cellular network. For example, the functions of the A-IoT-enabled UE can be implemented by a network device, such as a base station, or the functions of the A-IoT-enabled UE can also be implemented by a terminal device. The AIoT device can also be referred to as a device, and can be implemented by a terminal device in the cellular network, such as a first-type terminal device with extremely low power consumption and extremely low complexity. The network device and the first-type terminal device can perform non-contact data communication, thereby reading information from the first-type terminal device and / or writing information to be stored into the first-type terminal device. The AIoT technology can be used to implement one or more of the following services: inventory, positioning, sensing, or command. For example, the command service can include services for implementing read, write, disable, kill, or lock processes. For application scope, the AIoT technology can be applied to scenarios such as logistics, warehousing, industrial manufacturing, identity recognition, or environmental monitoring.

[0116] The 3GPP-defined IoT technology with extremely low power consumption and extremely low complexity can be understood as an extension of radio frequency identification (RFID) in 3GPP. Although the IoT technology and RFID have some similar principles, such as similar inventory service processes, the IoT technology in 3GPP introduces more valuable scenarios.

[0117] The AIoT technology is based on the cellular network communication infrastructure, and can include A-IoT-enabled UEs and passive AIoT devices or semi-passive terminal devices or active AIoT devices. The main services of the AIoT technology (referred to as AIoT services) include: inventory, positioning, sensing, or command. Typical application scenarios of the AIoT technology include logistics, warehousing, industrial manufacturing, identity recognition, environmental monitoring, and the like.

[0118] The inventorying service is to access, by the A-IoT-enabled UE, to the AIoT device within the coverage of the A-IoT-enabled UE. The AIoT device that succeeds in the access can send an identity of the AIoT device (an identity that can be recognized by the network, such as an electronic product code (EPC) in RFID) to the A-IoT-enabled UE. The inventorying service can also be referred to as a counting operation, and can obtain the identity of the tag. The tag can also be referred to as an electronic tag or a tag device, etc. For example, a tag is implemented by an AIoT device, and the tag can also be referred to as an AIoT tag, or can have other names. For example, the A-IoT-enabled UE can obtain the identity of the tag by using a query, an acknowledgement (ACK), or the like. In order to facilitate the counting of the tag, the tag can correspond to four session identities (session IDs), and each session identity corresponds to two inventorying states: A and B. The inventorying state is indicated by an inventorying flag (sessInventoried flag). When the A-IoT-enabled UE selects a tag, a select command sent by the A-IoT-enabled UE to the tag can carry one of the four session identities; and the tag that receives the select command can store the session identity. When the A-IoT-enabled UE performs the inventorying service on the tag, a query command sent to the tag includes the session identity. If the query command received by the tag includes the session identity, the tag can flip the inventorying state corresponding to the session identity from A to B. If the A-IoT-enabled UE sends a query command again to perform the inventorying service, since the inventorying state in the tag is B, the tag will not respond to the A-IoT-enabled UE, thereby avoiding that the same tag is counted multiple times in one round of inventorying period.

[0119] The positioning service is to position the location of the tag by using some positioning signals.

[0120] In the sensing service, the tag can report sensing data to the network device, and the sensing data can include temperature data, etc.

[0121] The command can include some operation instructions. It can be understood that the command service can include at least one of a read service, a write service, a disable service, or a lock service.

[0122] Read service, one or more of the following can be read from the memory of the tag: EPC, tag identifier (TID), or the content stored in the reserved area or user storage area of the tag, etc.

[0123] Write service, the memory of the tag can be written. For example, the network device issues a downlink instruction and data, and the downlink instruction can instruct the tag to write the data to the memory of the tag.

[0124] Disable service, the AIoT device can be temporarily disabled or permanently disabled.

[0125] Inactivate service, the tag can never work again.

[0126] Lock service, the information of the tag can be locked, and the read service or write service of the tag can be prevented. Alternatively, the lock service can also lock the storage area of the tag, and the read service or write service of the storage area can be prevented or allowed.

[0127] The above is only an example, and the AIoT technology can also include other services or operations, which will not be listed one by one here.

[0128] (4) Classification of AIoT devices.

[0129] The AIoT device can be divided into three categories: device A, device B, and device C.

[0130] Device A (for example, a passive device, similar to a passive tag or a passive tag) has no energy storage and cannot independently generate a signal, and uses backscatter to transmit a signal.

[0131] Device B (for example, a semi-passive device, similar to a semi-passive tag or a semi-passive tag) has energy storage but cannot independently generate a signal, uses backscatter to transmit a signal, and the energy stored by the device B can amplify the reflected signal.

[0132] Device C (for example, an active device, similar to an active tag or an active tag) has energy storage, can independently generate a signal, and has an active radio frequency element for transmission.

[0133] For the AIoT device as device A or device B, the AIoT device needs to obtain a carrier signal from the outside for backscattering communication. For the AIoT device as device C, a carrier can be generated by itself, and thus active communication can be performed without relying on an external device / node.

[0134] In addition, the following three types of AIoT devices are further defined: device 1, device 2a, and device 2b

[0135] device 1, a peak power consumption of about 1 microwatt (μW). With energy storage function. Initial sampling frequency offset (SFO) reaches 10 parts per million (ppm). Cannot amplify downlink (DL) signals and uplink (UL) signals. Needs to obtain a carrier signal from the outside for backscattering communication to perform uplink transmission.

[0136] device 2a, a peak power consumption of less than or equal to a few hundred μW. With energy storage function. SFO reaches 10 X ppm. Can amplify DL signals and / or UL signals. Needs to obtain a carrier signal from the outside for backscattering communication to perform uplink transmission.

[0137] device 2b, a peak power consumption of less than or equal to a few hundred μW. With energy storage function. SFO reaches 10 X ppm. Can amplify DL signals and / or UL signals. Can generate a carrier by itself, and thus active communication can be performed without relying on a carrier provided by an external device / node.

[0138] The AIoT device in the embodiments of the present application can be an AIoT device in any of the above classifications, or can be an AIoT device in other classification manners, which is not limited.

[0139] It is introduced above that both the network device and the terminal device can be an A-IoT-enabled UE. In the scenario that the terminal device is an A-IoT-enabled UE, the terminal device can access a corresponding network device, for example, the terminal device is in an RRC connected state under the network device. Wherein, the terminal device in the RRC connected state means that the terminal device has an RRC connection with the access network device, or an RRC connection is established.

[0140] In the AIoT service execution, the terminal device can perform cell selection / cell reselection, resulting in replacement of an access network device or replacement of a cell. The target cell of the terminal device and the source cell of the terminal device can belong to different access network devices, or the target access network device of the terminal device and the source access network device can be different access network devices. In this case, how the AIoT service should be handled is currently inconclusive.

[0141] In view of this, in the embodiments of the present application, in the first AIoT service execution, if the terminal device requests the second access network device to continue or re-establish a radio resource control (RRC) connection, the terminal device can determine whether to continue to execute the first AIoT service. The terminal device is, for example, an A-IoT-enabled UE in the first AIoT service. For example, if the terminal device determines to continue to execute the first AIoT service, the first AIoT service can be continued to be executed, thereby improving the continuity of the first AIoT service; or if the terminal device determines not to execute the first AIoT service, the first AIoT service can be stopped to be executed or no longer be executed. The no longer being executed can also be understood as not continuing to be executed or being stopped to be executed. It can be seen that the embodiments of the present application provide a processing manner for the AIoT service in the scenario of cell selection or cell reselection of the terminal device, and the behavior of the terminal device is clear, and the continuity of the AIoT service is improved.

[0142] The communication method provided by the embodiments of the present application can be applied to a fourth generation (4G) communication system, such as a long term evolution (LTE) communication system, and can also be applied to a fifth generation (5G) communication system, such as a 5G new radio (NR) communication system, or to various communication systems evolved after 5G, such as a future communication system. The method provided by the embodiments of the present application can also be applied to a bluetooth system, a wireless fidelity (Wifi) system, a long range radio (LoRa) system, or a vehicle-to-everything (V2X) system. The method provided by the embodiments of the present application can also be applied to a terrestrial network (TN), and can also be applied to a non-terrestrial network (NTN), such as a satellite communication system, for example, can be applied to a transparent satellite architecture, a backhaul satellite architecture, or a regenerative satellite architecture, and the like, without limitation.

[0143] FIG. 3 to FIG. 5 are schematic diagrams of several communication systems applicable to embodiments of the present application. FIG. 3 is a topology 1 architecture; FIG. 5 is a topology 2 architecture; and FIG. 7 is a topology 3 architecture. As shown in FIG. 3, an access network device (e.g., gNB) can be directly connected to an AIoT core network (AIoT CN, AIoT function), which can be a core network element or a core network function or a core network node or a core network device. The AIoT function can be AIoT device (e.g., there can be an upper layer between the AIoT function and the AIoT device, for transmitting one or more of AIoT messages, data, or signaling, which can be transparently transmitted by the access network device). The interface between the access network device and the AIoT function is a first interface, and correspondingly, XXAP can be an application protocol on the first interface (or XX interface), for providing signaling services between the access network device and the AIoT function, and one or more of the AIoT messages, data, or signaling exchanged between the two can be included in the XXAP message (msg).

[0144] As shown in FIG. 4, the access network device and the AIoT function are not directly connected, and therefore there is no first interface between the access network device and the AIoT function in FIG. 3. In FIG. 4, the information exchange between the access network device and the AIoT function needs to be forwarded through the AMF.

[0145] As shown in FIG. 5, the AMF connected to the access network device can be an enhanced AMF, which can serve both UE and AIoT device. There is an upper layer between the AMF and the AIoT device, for transmitting one or more of AIoT messages, data, or signaling, which can be transparently transmitted by the access network device. Optionally, the AIoT function can be the AMF, or it can be understood that the AMF has the function of the AIoT function.

[0146] Optionally, the AIoT function can also be referred to as a tag management function (TMF) or an ambient IoT management function (AIoT function), or it can also have other names.

[0147] The reader shown in any one of FIG. 3 to FIG. 5 is implemented by, for example, a UE, such as an A-IoT-enabled UE in AIoT service, and the AIoT device shown in any one of FIG. 3 to FIG. 5 is, for example, an AIoT device. The UE and the AIoT device can perform AIoT service. By performing the AIoT service, corresponding data and the like can be generated, and the UE can send the data to a network device serving the UE or can not send the data. Since the UE can report the data and the like generated by performing the AIoT service with the AIoT device to the network device, it can also be considered that the network device, the UE, and the AIoT device can perform the AIoT service, or it can be understood that network elements participating in the execution of the AIoT service can include the network device, the UE, and the AIoT device. The network device can include one or more of the following: a first access network device, a second access network device, or a core network device.

[0148] The AIoT network architecture can include topology 1 to topology 4.

[0149] FIG. 6 is a schematic diagram of the composition of AIoT network architecture topology 1 according to an embodiment of the present application. As shown in FIG. 6, in topology 1, the AIoT device directly communicates with the network device in both directions. The communication between the network device and the AIoT device includes data and / or signaling of the AIoT service. The topology 1 includes a network device sending to the AIoT device and a network device receiving from the AIoT device, that is, there is uplink / downlink data / signaling between the network device and the AIoT device.

[0150] FIG. 7 is a schematic diagram of the composition of AIoT network architecture topology 2 according to an embodiment of the present application. As shown in FIG. 7, in topology 2, the AIoT device communicates with the intermediate node in both directions. The intermediate node can be a repeater, an IAB node, a UE, etc., and can implement AIoT. The intermediate node transmits one or more of messages, data, or signaling of the AIoT service between the network device and the AIoT device.

[0151] FIG. 8 and FIG. 9 are two schematic diagrams of the composition of AIoT network architecture topology 3 according to an embodiment of the present application. In topology 3, as shown in FIG. 8, the AIoT device sends one or more of messages, data, or signaling to the network device and receives one or more of messages, data, or signaling from the auxiliary node; or as shown in FIG. 9, the AIoT device receives one or more of messages, data, or signaling from the network device and sends one or more of messages, data, or signaling to the auxiliary node. In topology 3, the auxiliary node can be a repeater, an IAB, a UE, etc., and these devices can implement AIoT.

[0152] FIG. 10 is a schematic diagram of a composition of an AIoT network architecture topology 4 according to embodiments of the present application. As shown in FIG. 10, in the topology 4, AIoT devices communicate with UEs in a bidirectional manner. The communication between the UEs and the AIoT devices includes one or more of messages, data, or signaling of AIoT traffic.

[0153] The network device shown in any one of FIGS. 6-9 is, for example, an access network device, such as a base station.

[0154] Embodiments of the present application can be applied to the network architecture of the above-described topology 2 or topology 4, and the UE functions as an A-IoT-enabled UE to perform AIoT traffic.

[0155] Under the topology 2 architecture, there are currently three solutions available for transmitting one or more of messages, data, or signaling related to AIoT traffic.

[0156] Solution 1: RRC based solution. The A-IoT-enabled UE refers to a UE that functions as an A-IoT-enabled UE.

[0157] The protocol stack corresponding to solution 1 can refer to FIG. 11. In the figure, the AIoT device includes AIoT radio protocol layers that communicate with the A-IoT-enabled UE. The A-IoT-enabled UE includes AIoT radio protocol layers that communicate with the AIoT device, and includes an RRC layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, a media access control (MAC) layer, and a physical (PHY) layer that communicate with the access network device. The access network device includes an RRC layer, a PDCP layer, an RLC layer, a MAC layer, and a PHY layer that communicate with the A-IoT-enabled UE; and further includes an XXAP layer, a stream control transmission protocol (SCTP) layer, an internet protocol (IP) layer, a layer 2 (L2), and a layer 1 (L1) that communicate with the AIoT core network device. The AIoT core network device includes an XXAP layer, an SCTP layer, an IP layer, an L2, and an L1 that communicate with the access network device. The AIoT core network device is, for example, an AIoT F, or an AMF that can perform AIoT services or implement AIoT functions.

[0158] The access network device can further send the relevant information to the A-IoT-enabled UE through an RRC message of the A-IoT-enabled UE after receiving the AIoT service related request from the AIoT core network device through the XXAP. The access network device can further transmit the relevant information to the AIoT core network device through the XXAP after receiving the AIoT service related data / signaling from the A-IoT-enabled UE through the RRC.

[0159] Solution 2: NAS based solution.

[0160] The protocol stack corresponding to solution 2 can refer to FIG. 12. In FIG. 12, the AIoT device includes AIoT radio protocol layers for communication with the A-IoT-enabled UE. The A-IoT-enabled UE includes AIoT radio protocol layers for communication with the AIoT device, NAS layers for communication with the AIoT core network device, and 5G-access network protocol layers (AN protocol layers) for communication with the access network device. The access network device includes 5G-AN protocol layers for communication with the A-IoT-enabled UE, and further includes next generation application protocol (NGAP) layers, SCTP layers, IP layers, L2, and L1 for communication with the AIoT core network device. The AIoT core network device includes NAS layers for communication with the A-IoT-enabled UE, and further includes NGAP layers, SCTP layers, IP layers, L2, and L1 for communication with the access network device. The AIoT core network device can be, for example, a TMF, or an AMF capable of performing AIoT services or implementing AIoT functions.

[0161] For solution 2, it can be understood that one or more of the AIoT service related messages, data, or signaling between the AIoT core network device and the A-IoT-enabled UE are carried on the DL NAS packet or the UL NAS packet of the A-IoT-enabled UE (where the access network device can transparently transmit the NAS packet), and the access network device can process the NAS packet of the A-IoT-enabled UE through the existing DL NAS Transport message (DL NAS Transport msg) and / or UL NAS Transport msg on the NGAP interface.

[0162] Solution 3: User plane (UP) based solution

[0163] The protocol stack corresponding to solution 3 can refer to FIG. 13. Among them, the AIoT device includes AIoT radio protocol layers for communication with the A-IoT-enabled UE. The A-IoT-enabled UE includes AIoT radio protocol layers for communication with the AIoT device, PDU layers for communication with the core network device, and includes 5G-AN protocol layers for communication with the access network device. The access network device includes 5G-AN protocol layers for communication with the A-IoT-enabled UE; also includes GPRS tunneling protocol user plane (GTP-U) layers, user datagram protocol (UDP) layers, IP layers, L2, and L1 for communication with the core network device. The core network device includes PDU layers for communication with the A-IoT-enabled UE, and also includes GTP-U layers, UDP layers, SCTP layers, IP layers, L2, and L1 for communication with the access network device. Among them, the core network device is, for example, a core network user plane device, such as a UPF. The core network device can communicate with the AIoT core network device, or can communicate with the AIoT core network device through other network elements (such as AMF). The AIoT core network device is, for example, a TMF, or an AMF capable of performing AIoT services or implementing AIoT functions, etc. For example, the core network device can send one or more of AIoT service related messages, data or signaling from the A-IoT-enabled UE or the access network device to the AIoT core network device; the core network device can send one or more of AIoT service related messages, data or signaling from the AIoT core network device to the A-IoT-enabled UE or the access network device.

[0164] The AIoT service related data / signaling between the AIoT core network device and the A-IoT-enabled UE can be carried on the PDU Session of the A-IoT-enabled UE (the access network device can be transparently transmitted), and the access network device can process the user plane data of the A-IoT-enabled UE through a next generation user plane (NG-U), general packet radio service (GPRS) tunneling protocol user plane (GTP-U) or the like.

[0165] Among them, FIG. 11, FIG. 12, FIG. 13 are only exemplary protocol stacks corresponding to the above three solutions, or any one or more of the above three solutions can also correspond to other forms of protocol stacks, which are not limited.

[0166] In the embodiments of the present application, when the UE as the A-IoT-enabled UE adopts the solution 1, the network architecture shown in any one of FIG. 3 to FIG. 5 can be used; when the UE as the A-IoT-enabled UE adopts the solution 2, the network architecture shown in any one of FIG. 3 to FIG. 5 can be used; when the UE as the A-IoT-enabled UE adopts the solution 3, the network architecture shown in any one of FIG. 3 to FIG. 5 can be used.

[0167] The network architecture and the communication process described in the embodiments of the present application are used 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 by the embodiments of the present application. Those skilled in the art can know that, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0168] The method provided by the embodiments of the present application will be described below with reference to the accompanying drawings. In the corresponding drawings of the various embodiments of the present application, the steps indicated by the dashed lines are optional steps. In the various embodiments of the present application, the first AIoT service may, for example, include one or more of the following: inventory (or inventory service), read (or read service), write (or write service), disable (or disable service), deactivation operation (or deactivation service), lock operation (or lock service), or positioning operation (or positioning service). Alternatively, the first AIoT service can also include other services, which are not limited.

[0169] The various embodiments of the present application can be applied to the network architecture shown in any one of FIGS. 3-10. For example, the UE described in the various embodiments of the present application can be an A-IoT-enabled UE, an IoT-enabled UE, an intermediate node, or a UE reader, which can be a reader / writer shown in any one of FIGS. 3-5, or an intermediate node shown in FIG. 7, or an auxiliary node shown in FIG. 8 or FIG. 9, or a UE shown in FIG. 10; the second access network device described in the various embodiments of the present application can be a target access network device of the UE, and the first access network device described in the various embodiments of the present application can be an original access network device of the UE, for example, the access network device shown in any one of FIGS. 3-5 can be the first access network device or the second access network device, or the network device shown in any one of FIGS. 6-9 can be the first access network device or the second access network device; the first core network device described in the various embodiments of the present application can be an AIoT core network device, which serves AIoT devices, for example, the first core network device is an AIoT F shown in any one of FIGS. 3-4, or an AMF shown in FIG. 5; the AIoT device described in the various embodiments of the present application can be an AIoT device shown in any one of FIGS. 3-10. In the various embodiments of the present application, the A-IoT-enabled UE can also be referred to as a reader or a reader / writer.

[0170] The first communication method is provided in the embodiments of the present application, and please refer to FIGS. 14-17 for several flowcharts of the method.

[0171] S1401, the UE performs a first AIoT service.

[0172] For example, the UE accesses the first access network device, for example, the UE is within the coverage of the first access network device. For example, the UE accesses a first cell, which can be a cell provided or controlled by the first access network device. The UE can be in an RRC connected state.

[0173] For example, the server can send a service request, thereby triggering the first AIoT service. There can be different ways for the server to trigger the first AIoT service. The server can be an external server, for example, an IoT server, a user server, or a factory server, etc., which can have an AIoT service or an AIoT function.

[0174] If the transmission of the first AIoT service adopts the solution 1 introduced in the foregoing, that is, one or more of the messages, data or signaling related to the first AIoT service is transmitted between the UE and the network based on RRC, the server can send a service request (for example, referred to as service request 1) to the first core network device, and the service request 1 can request the first AIoT service. For details, refer to S1402a. When the first AIoT service is an inventory service, the service request 1 can be replaced by an inventory request. When the first AIoT service is a command, the service request 1 can be replaced by a command or a command request. The first core network device receives the service request 1, and can send a service request (for example, referred to as service request 2) to the first access network device, and the service request 2 can request the first AIoT service. For details, refer to S1402b. The first access network device receives the service request 2, and can send a service request (for example, referred to as service request 3) to the UE, and the service request 3 can request the first AIoT service. For details, refer to S1402c. The UE receives the service request 3, and can perform the first AIoT service with the AIoT device. The number of the AIoT devices is one or more, and the AIoT device is, for example, a device related to the first AIoT service. For example, the first AIoT service is an inventory service, and the AIoT device can be a device to be inventoried.

[0175] Optionally, the service request 2 can include one or more of the following: information of the first area, the first identifier, and a device identification.

[0176] The first area can be an area related to the first AIoT service, or the first area is an execution area of the first AIoT service. For example, the first AIoT service is an inventory service, and the first area can be an inventory area corresponding to the inventory service.

[0177] The first identifier is, for example, a service ID corresponding to the first AIoT service, or a session ID corresponding to the first AIoT service, or a task ID corresponding to the first AIoT service, or a transaction ID corresponding to the first service, or other identifier corresponding to the first AIoT service. The first identifier can be used to indicate or identify the first AIoT service.

[0178] Optionally, the service request 3 can comprise one or more of the following: information of the first area, the first identity, or the device identity. The device identity can be used to identify, indicate or recognize one or a group or all of the AIoT devices, for example, the device identity can be a mask, or a group ID, etc.

[0179] Alternatively, if the transmission of the first AIoT service adopts the solution 2 introduced above, i.e., one or more of the messages, data or signaling related to the first AIoT service are transmitted between the UE and the network based on NAS, the server can send a service request, for example, referred to as service request 1, to the first core network device, the service request 1 can request the first AIoT service, for which reference can be made to S1402a, when the first AIoT service is the inventory service, the service request 1 can be replaced by Inventory Request; when the first AIoT service is the Command, the service request 1 can be replaced by Command or Command Request; the first core network device receiving the first service request can send a fifth message to the UE, the fifth message can request the first AIoT service, wherein the fifth message is transmitted through the first access network device, the NAS message in the fifth message can reach the UE, for which reference can be made to S1402d; the UE receiving the NAS message can then perform the first AIoT service with the AIoT device. The fifth message is for example XXAP message or NGAP message, the fifth message can comprise the NAS message and first indication information, the first access network device can decode / recognize the first indication information, for example, the first access network device can configure AIoT radio resource for the UE according to the first indication information. The NAS message can comprise the service request 1. The first indication information can request or indicate the first AIoT service. The first indication information is also referred to as AIoT indication, or can also have other names. Optionally, the service request 1 can comprise one or more of the following: information of the first area, the first identity, or the device identity.

[0180] Or, if the transmission of the first AIoT service adopts the solution 3 introduced in the foregoing, i.e., the UE and the network transmit one or more of the messages, data or signaling related to the first AIoT service based on the PDU session, the server can send a service request, e.g., referred to as service request 1, to the first core network device, the service request 1 can request the first AIoT service, for details, refer to S1402a, when the first AIoT service is the inventory service, the service request 1 can be replaced by the Inventory Request; when the first AIoT service is the Command, the service request 1 can be replaced by the Command or the Command Request; the first core network device receives the service request 1, and can send a service request 2 to the second core network device, the service request 2 is, for example, the service request 1, or a message generated by the first core network device according to the service request 1, for details, refer to S1402e; the second core network device receives the service request 2, and can send a sixth message to the UE, the sixth message can request the first AIoT service, wherein the sixth message reaches the UE through the first access network device, for details, refer to S1402f; the UE receives the service request, and can perform the first AIoT service with the AIoT device. Wherein, the second core network device is, for example, a core network user plane device, e.g., a UPF. The sixth message is, for example, a core network user plane message, e.g., a message transmitted through a PDU session. Optionally, the service request 1 can include one or more of the following: information of the first area, the first identifier, or the device identifier. Optionally, the service request 2 can include one or more of the following: information of the first area, the first identifier, or the device identifier. Optionally, the sixth message can include one or more of the following: information of the first area, the first identifier, or the device identifier. For example, the sixth message includes the service request 2.

[0181] Wherein, no matter which solution the first AIoT service adopts, from the sending of the service request 1 by the server, it can be considered that the first AIoT service has started to be executed. That is, the execution of the first AIoT service can include one or more of the following processes: the UE and the AIoT device transmit one or more of the messages, data or signaling related to the first AIoT service, the UE and the network device (e.g., the access network device and / or the AIoT core network device) transmit one or more of the messages, data or signaling related to the first AIoT service, or the network device and the server transmit one or more of the messages, data or signaling related to the first AIoT service.

[0182] S1403. In the execution of the first AIoT service, or when the first AIoT service has not been executed completely, the UE sends a first message to the second access network device. Correspondingly, the second access network device receives the first message. The first message can request to continue or reestablish the RRC connection, for example, the RRC connection between the UE and the second access network device. For example, the first message can be an RRC reestablishment request (RRCReestablishmentRequest) message.

[0183] Optionally, the UE sending the first message to the second access network device includes that the UE sending the first message to the second cell. For example, the original serving cell of the UE is the first cell, and the first cell is a cell provided or controlled by the first access network device; and the second cell is a cell provided or controlled by the second access network device. The first access network device and the second access network device are different access network devices.

[0184] Optionally, the execution of the first AIoT service or the first AIoT service not being executed completely can be that the information interaction between the UE and the AIoT device has not been completed. For example, the first AIoT service is the inventory service, and the execution of the first AIoT service or the first AIoT service not being executed completely can mean that the UE has not finished inventorying the AIoT device.

[0185] Alternatively, the execution of the first AIoT service or the first AIoT service not being executed completely can also mean that the information interaction between the UE and the AIoT device has been completed, but the UE has not reported part or all of the information of the first AIoT service to the network. For example, the first AIoT service is the inventory service, and the execution of the first AIoT service or the first AIoT service not being executed completely can mean that the UE has finished inventorying the AIoT device, but the UE has not sent part or all of the information of the first AIoT service to the first access network device or the AIoT core network device. The information of the first AIoT service can include one or more of the messages, data, or signaling related to the first AIoT service.

[0186] In the embodiments of the present application, the UE sending the first message can be because the UE has a radio link failure (RLF) or a reconfiguration failure or an integrity check failure in the first cell or the first access network device, and then the UE can send the first message to the second access network device or the second cell.

[0187] Alternatively, the UE sending the first message can also be due to other reasons, and embodiments of the present application do not limit the reason for the UE sending the first message.

[0188] Optionally, the first message is, for example, an RRC Reestablishment Request message, or UE Assistance Information (UAI), or other RRC message sent by the UE to the network. Optionally, the first message can further include one or more of the following: the first identifier, information of the first area, or information of the first power. The meanings of these items will be described later.

[0189] S1404, the UE determines whether to perform (or, continue to perform) the first AIoT service. Hereinafter, an example of the UE determining whether to continue to perform the first AIoT service is described.

[0190] The execution of the first AIoT service includes one or more of the following: reporting (or, sending) one or more of the messages, data or signaling corresponding to the first AIoT service to the network, transmitting one or more of the messages, data or signaling corresponding to the first AIoT service to the AIoT device, or being an A-IoT-enabled UE of the first AIoT service. Therefore, in S1404, the UE determining whether to continue to perform the first AIoT service can include the UE determining whether to continue to perform one or more of the above. Any one of FIGS. 14-17 includes S1401, S1402a-S1402f, S1403 and S1404.

[0191] The UE determining whether to continue to perform the first AIoT service can be in different ways, for example, as follows.

[0192] I. The first optional implementation of the UE determining whether to continue to perform the first AIoT service.

[0193] In the first optional implementation, the UE determines by itself whether to continue to perform the first AIoT service. For example, the UE can determine by itself whether to continue to perform the first AIoT service when sending the first message, or can determine by itself whether to continue to perform the first AIoT service after sending the first message, or can determine by itself whether to continue to perform the first AIoT service after completing the RRC reestablishment (for example, when the first message is an RRC Reestablishment Request message).

[0194] For example, the UE can determine whether to continue performing the first AIoT service according to the first region, and / or can determine whether to continue performing the first AIoT service according to the first power, and / or can also determine whether to continue performing the first AIoT service according to other factors.

[0195] For example, the UE can determine whether to continue performing the first AIoT service according to the first region, and / or can determine whether to continue performing the first AIoT service according to the first power, and / or can also determine whether to continue performing the first AIoT service according to other factors.

[0196] For example, if the coverage of the second access network has intersection with the first region, the first AIoT service can be continued to be performed; or if the coverage of the second access network has no intersection with the first region, the first AIoT service can not be continued to be performed, for example, the first AIoT service can be stopped to be performed. If the coverage of the second access network has no intersection with the first region, it indicates that the coverage of the second access network device does not meet the region requirement of the first AIoT service, even if the first AIoT service is continued to be performed, it can be failed to be performed or an expected execution result can not be obtained. Therefore, in this case, the first AIoT service can not be performed, so as to reduce invalid execution process and reduce device power consumption.

[0197] For example, if the coverage of the second access network has intersection with the first region, the first AIoT service can be continued to be performed; or if the coverage of the second access network has no intersection with the first region, the first AIoT service can not be continued to be performed, for example, the first AIoT service can be stopped to be performed. If the coverage of the second access network has no intersection with the first region, it indicates that the coverage of the second access network device does not meet the region requirement of the first AIoT service, even if the first AIoT service is continued to be performed, it can be failed to be performed or an expected execution result can not be obtained. Therefore, in this case, the first AIoT service can not be performed, so as to reduce invalid execution process and reduce device power consumption.

[0198] Alternatively, in another optional implementation, the UE determines whether to continue performing the first AIoT service according to the first region, the location of the UE, and the coverage of the second access network device. For example, if the coverage of the second access network intersects with the first region, and the UE is located in the intersection, the UE can continue to perform the first AIoT service; or if the coverage of the second access network does not intersect with the first region, the UE can not continue to perform the first AIoT service, for example, can stop performing the first AIoT service; or if the coverage of the second access network intersects with the first region, but the UE is not located in the intersection, the UE can not continue to perform the first AIoT service, for example, can stop performing the first AIoT service. If the UE as an A-IoT-enabled UE is not located in the intersection, it indicates that the location of the UE does not meet the region requirement of the first AIoT service, and even if the UE continues to perform the first AIoT service, it may fail to perform or obtain the expected execution result. Therefore, in this case, the UE can not have to perform the first AIoT service, so as to reduce invalid execution process and reduce device power consumption.

[0199] In the above implementations, the UE can determine its location by itself, or can be positioned by a network device (for example, the first access network device or the second access network device, etc.), and the network device can send the location information of the UE to the UE.

[0200] Regarding the first region, the UE can determine according to the first information, for example, pre-configuration or indication. For example, according to the foregoing description, the first information is, for example, the service request 3, or the information of the first region included in the service request 3. Alternatively, the first information is, for example, the NAS message from the first core network device (and transmitted via the second access network device), or the service request 1 included in the NAS message, or the information of the first region included in the NAS message. Alternatively, the first information is, for example, the sixth message from the second core network device (and transmitted via the second access network device), or the information of the first region included in the sixth message.

[0201] For example, if the first power is greater than or equal to the first power threshold, the UE can continue to perform the first AIoT service; or if the first power is less than the first power threshold, the UE can not continue to perform the first AIoT service, for example, can stop performing the first AIoT service. If the first power is less than the first power threshold, it indicates that the UE is insufficient in power, and the remaining power can not be able to support the UE to continue to perform the first AIoT service, and therefore the UE can stop performing the first AIoT service.

[0202] II. The UE determines whether to continue performing the first AIoT service according to a second alternative implementation.

[0203] In the second alternative implementation, the UE can determine whether to continue performing the first AIoT service according to first information. The first information is, for example, information received by the UE, which can come from the first access network device, the second access network device, or the first core network device. If the first information comes from the first access network device, the first information can be delivered to the UE via the second access network device; or if the first information comes from the first core network device, the first information can be delivered to the UE via the second access network device, or via the second core network device and the second access network device. Different sources of the first information indicate different devices for determining whether to continue performing the first AIoT service. For example, if the first access network device determines whether to continue performing the first AIoT service, the first information can be generated and sent by the first access network device, or it can be understood that the first information comes from the first access network device; or if the second access network device determines whether to continue performing the first AIoT service, the first information can be generated and sent by the second access network device, or it can be understood that the first information comes from the second access network device; or if the first core network device determines whether to continue performing the first AIoT service, the first information can be generated and sent by the first core network device, or it can be understood that the first information comes from the first core network device. The following describes these ways respectively, which can also be regarded as different sub- implementations of the second alternative implementation in which the UE determines whether to continue performing the first AIoT service.

[0204] 1. The first sub-implementation of the second alternative implementation, which can correspond to FIG. 14.

[0205] In the first sub-implementation, the second access network device determines whether to continue performing the first AIoT service. Optionally, the UE can also send sixth information to the second access network device, which can be used to request whether to continue performing the first AIoT service. After receiving the sixth information, the second access network device can determine whether to continue performing the first AIoT service, which can be referred to as S1405 in FIG. 14. Optionally, the sixth information can be included in the first message, or it can be included in other messages, such as UAI or other RRC messages. FIG. 14 takes the sixth information included in the first message as an example. Optionally, the UE can also send a first identifier to the second access network device, which can be included in the first message or other messages, such as UAI or other RRC messages. For example, the UE can send information of the first area and / or the first identifier to the second access network device.

[0206] The second access network device determines whether to perform the first AIoT service in a manner similar to that of the UE, for example, the second access network device can also determine whether to perform the first AIoT service according to the first area and / or the first power and other factors, and details are not repeated. If the second access network device determines whether to continue to perform the first AIoT service according to the first area, the information of the first area needs to be obtained. The second access network device can obtain the information of the first area from the terminal, or the second access network device can also obtain the information of the first area from the first access network device. The information of the first area can also be referred to as first area information, which can indicate the first area. For example, the second access network device can receive the information of the first area from the terminal, so that the second access network device obtains the information of the first area from the terminal. Alternatively, the information of the first area can be included in the first message or other messages.

[0207] For another example, the second access network device receives the first message, and can send a retrieve UE context request message to the first access network device to request to retrieve the context of the UE, for which reference can be made to S1406 in FIG. 14; the first access network device can send a retrieve UE context response message to the second access network device, for which reference can be made to S1407 in FIG. 14. The retrieve UE context response message can include the context of the UE, and optionally, the information of the first area, so that the second access network device obtains the information of the first area from the first access network device. If the second access network device obtains the information of the first area through the first message, S1405 can occur before S1406-S1407, or after S1406-S1407, or simultaneously with S1406-S1407. Alternatively, if the second access network device obtains the information of the first area through the retrieve UE context response message, S1405 can occur after S1406-S1407. FIG. 14 takes S1405 occurring after S1406-S1407 as an example.

[0208] Taking the first message as an RRC reestablishment request message as an example, the UE can perform random access (RA) with the second access network device to access the second access network device before sending the RRC reestablishment message. The random access procedure can occur before S1404.

[0209] The second access network device sends the first information, and correspondingly, the UE receives the first information. For details, refer to S1408 in FIG. 14. The first information can indicate to continue to perform the first AIoT service, or indicate not to continue to perform or stop performing the first AIoT service. The UE can determine whether to continue to perform the first AIoT service according to the first information. Optionally, the first information is, for example, an RRC reestablishment (RRCReestablishement) message, or another message, or the first information is included in the RRC reestablishment message or the other message (for example, the first information is one or more information elements (IEs) in the RRC reestablishment message or the other message). For example, the first message is an RRC reestablishment request message, and the first information can be the RRC reestablishment message or the other message. For another example, the first message is a UAI or another message, and the first information can be the corresponding message or information in the message. Optionally, the first information can further include the first identifier. Alternatively, the first information does not include the first identifier, but the first information and the first identifier can be included in the same message.

[0210] In the embodiments of the present application, it can be considered that S1404 includes S1405-S1408; or it can also be considered that S1404 occurs after S1408. FIG. 14 takes the case that S1404 occurs after S1408 as an example.

[0211] Optionally, after receiving the RRC reestablishment message, the UE can further send an RRC reestablishment complete (RRCReestablishmentComplete) message to the second access network device. For details, refer to S1409 in FIG. 14.

[0212] Optionally, the second access network device receiving the RRC reestablishment complete message can further send a path switch request message to the first core network device to request switching of a transmission path of data corresponding to the UE. For this, reference can be made to S1410 in FIG. 14. The first core network device receiving the PATH SWITCH REQUEST message can send a path switch request acknowledgment (PATH SWITCH REQUEST ACKNOWLEDGE) message to the second access network device to confirm or reject switching of the transmission path of data corresponding to the UE. For this, reference can be made to S1411 in FIG. 14. Optionally, the path switch request acknowledgment message can include fifth information. The fifth information can indicate that the UE is authorized as an A-IoT-enabled UE for the first AIoT service, or indicate that the UE is authorized to perform the first AIoT service, or indicate that the UE is authorized as an A-IoT-enabled UE for the first AIoT, or indicate that the UE is authorized to communicate with the AIoT device, or indicate that the UE is authorized to transmit one or more of messages, data, or signaling related to the first AIoT service with the AIoT device. Optionally, the first AIoT service indicated by the fifth information can also be replaced by an AIoT service, that is, the fifth information can not be specific to a particular AIoT service, but can be generally applicable to various AIoT services. The fifth information can also be referred to as an A-IoT-enabled UE authorization indication, or can also have other names, such as an authorization (or indication) of the UE to communicate with the AIoT device, or an authorization of the UE to perform (or conduct) the AIoT service (or the first AIoT service).

[0213] Optionally, the second access network device can further send eighth information to the UE. The eighth information can indicate first resources. The first resources can be used for the UE to transmit one or more of messages, data, or signaling corresponding to the first AIoT service with the AIoT device, or for the UE to communicate with the AIoT device. For example, the first resources include wireless resources between the UE and the AIoT device. Optionally, the first resources are AIoT wireless resources configured by the second access network device for the UE, for example, the second access network device can configure the AIoT wireless resources for the UE according to the first indication information.

[0214] 2. A second sub-implementation of the second optional implementation, which can correspond to FIG. 15.

[0215] In a second sub-embodiment, the first access network device determines whether to continue performing the first AIoT service. Optionally, the UE can further send sixth information to the second access network device, and the sixth information can be used to request whether to continue performing the first AIoT service. Optionally, the sixth information can be included in the first message, or can be included in other messages, for example, included in the UAI or other RRC messages. FIG. 15 takes the sixth information included in the first message as an example. Optionally, the UE can further send the first identifier to the second access network device, for example, the first identifier is included in the first message, or included in other messages, for example, included in the UAI or other RRC messages. For example, the UE can send the information of the first area and / or the first identifier to the second access network device. Optionally, the first message is, for example, an RRC reestablishment request message, or a UAI, or can be other messages. Optionally, the first message can further include one or more of the following: the first identifier, the information of the first area, or the information of the first power.

[0216] Taking the first message as an RRC reestablishment request message as an example, optionally, before the UE sends the RRC reestablishment message, the UE can perform random access with the second access network device to access the second access network device. Wherein, the random access procedure can occur before S1404.

[0217] After the second access network device receives the sixth information, the second access network device can send ninth information to the first access network device, and correspondingly, the first access network device receives the ninth information, which can be referred to as S1501 in FIG. 15. The ninth information can request or inquire whether to continue performing the first AIoT service. Optionally, the ninth information can further include the first identifier and / or the information of the first power.

[0218] After the first access network device receives the ninth information, the first access network device can determine whether to continue performing the first AIoT service, which can be referred to as S1502 in FIG. 15. The first access network device determines whether to perform the first AIoT service in a manner similar to that of the UE, for example, the first access network device can also determine whether to perform the first AIoT service according to the first area and / or the first power, and will not be described in detail. Wherein, if the first access network device determines whether to continue performing the first AIoT service according to the first area, the first area information needs to be obtained. The first access network device can obtain the first area information from the first core network device, which can be referred to as the foregoing description.

[0219] The first access network device sends tenth information to the second access network device, and correspondingly, the second access network device receives the tenth information. For details, refer to S1503 in FIG. B. The tenth information can indicate to continue to perform the first AIoT service, or to not continue to perform or stop performing the first AIoT service. Optionally, the ninth information is included in a third message, for example, the third message is a RETRIEVE UE CONTEXT REQUEST message; and the tenth information is included in a fourth message, for example, the fourth message is a RETRIEVE UE CONTEXT RESPONSE message. For example, the third message can also be used to request the context of the UE, and the fourth message can include the context of the UE. Alternatively, the third message and the fourth message can also be other messages between access network devices. FIG. 15 takes the case that the ninth information is included in the third message and the tenth information is included in the fourth message as an example.

[0220] The second access network device sends the first information, and correspondingly, the UE receives the first information. For details, refer to S1408 in FIG. 15. For example, the second access network device receives the fourth message, and can send the first information. The first information can indicate to continue to perform the first AIoT service, or to not continue to perform or stop performing the first AIoT service. The UE can determine whether to continue to perform the first AIoT service according to the first information. For more details about the first information, refer to the related content of the first sub-embodiment.

[0221] In the embodiments of the present application, it can be considered that S1404 includes S1408 and S1501-S1503; or it can also be considered that S1404 occurs after S1408. FIG. 15 takes the case that S1404 occurs after S1408 as an example.

[0222] Optionally, the UE receives the RRC reestablishment message, and can also send an RRC reestablishment complete message to the second access network device. For details, refer to S1409 in FIG. 15.

[0223] Optionally, the second access network device receives the RRC reestablishment complete message, and can also send a PATH SWITCH REQUEST message to the first core network device to request to switch the transmission path of the data corresponding to the UE. For details, refer to S1410 in FIG. 15. The first core network device receives the PATH SWITCH REQUEST message, and can send a PATH SWITCH REQUEST ACKNOWLEDGE message to the second access network device to confirm or reject to switch the transmission path of the data corresponding to the UE. For details, refer to S1411 in FIG. 15. Optionally, the PATH SWITCH REQUEST ACKNOWLEDGE message can include fifth information. For details about the fifth information, refer to the first sub-embodiment.

[0224] Optionally, the second access network device can further send eighth information to the UE, the eighth information can be used for the UE to transmit one or more of messages, data or signaling corresponding to the first AIoT service with the AIoT device, or for the UE to communicate with the AIoT device.

[0225] 3. The third sub-implementation of the second optional implementation, which can correspond to FIG. 16.

[0226] In the third sub-implementation, the first core network device determines whether to continue to perform the first AIoT service. Optionally, the UE can further send sixth information to the second access network device, the sixth information can be used to request whether to continue to perform the first AIoT service. Optionally, the sixth information can be included in the first message, or can be included in other messages, such as UAI or other RRC messages. FIG. 16 takes the sixth information included in the first message as an example. Optionally, the UE can further send a first identifier to the second access network device, such as the first identifier included in the first message, or included in other messages, such as UAI or other RRC messages. For example, the UE can send the information of the first area and / or the first identifier to the second access network device. Optionally, the first message is, for example, an RRC reestablishment request message, or a UAI, or can be other messages. Optionally, the first message can further include one or more of the following: the first identifier, the information of the first area, or the information of the first power.

[0227] Taking the first message as an RRC reestablishment request message as an example, optionally, before the UE sends the RRC reestablishment message, the UE can perform random access with the second access network device to access the second access network device. The random access procedure can occur before S1404.

[0228] After the second access network device receives the sixth information, the second access network device can send seventh information to the first core network device, and correspondingly, the first core network device receives the seventh information, which can be referred to as S1601 in FIG. 16. The seventh information can request or inquire whether to continue to perform the first AIoT service. Optionally, the seventh information can be included in the seventh message, which is taken as an example in FIG. 16. Optionally, the seventh message can further include the first identifier and / or the information of the first power.

[0229] After the first core network device receives the seventh information, the first core network device can determine whether to continue to perform the first AIoT service. The first core network device can determine whether to perform the first AIoT service in a similar manner to the UE, such as the first core network device can also determine whether to perform the first AIoT service according to the first area and / or the first power, and the like, which will not be described in detail.

[0230] The first core network device sends eleventh information to the second access network device, and correspondingly, the second access network device receives the eleventh information. For details, refer to S1602 in FIG. 16. Optionally, the eleventh information is included in the eighth message, for example. FIG. 16 is used as an example. The eleventh information can indicate to continue to perform the first AIoT service, or to not continue to perform or stop performing the first AIoT service. Optionally, the seventh message is, for example, a PATH SWITCH REQUEST message, and the eighth message is, for example, a PATH SWITCH REQUEST ACKNOWLEDGE message. For example, the seventh message can also be used to request to switch the path corresponding to the UE, and the eighth message can confirm or reject the switching of the path of the UE. Alternatively, the seventh message and the eighth message can also be other messages between the second access network device and the first core network device. Optionally, the eighth message can also include the fifth information. For details of the fifth information, refer to the first sub-embodiment.

[0231] The second access network device sends the first information, and correspondingly, the UE receives the first information. For details, refer to S1408 in FIG. 16. For example, the second access network device receives the eighth message, and then can send the first information. The first information can indicate to continue to perform the first AIoT service, or to not continue to perform or stop performing the first AIoT service. The first information is, for example, an RRC message or included in an RRC message.

[0232] In the embodiments of the present application, it can be considered that S1404 includes S1408 and S1601-S1602; or it can also be considered that S1404 occurs after S1408. FIG. 16 is used as an example in which S1404 occurs after S1408.

[0233] Optionally, the second access network device receives the first message, and can also send a RETRIEVE UE CONTEXT REQUEST message to the first access network device to request to obtain the context of the UE. For details, refer to S1406 in FIG. 16. The first access network device can send a RETRIEVE UE CONTEXT RESPONSE message to the second access network device. For details, refer to S1407 in FIG. 16. The RETRIEVE UE CONTEXT RESPONSE message can include the context of the UE.

[0234] For example, the first message is an RRC reestablishment request message. Optionally, the second access network device receives the first message, and can also send an RRC reestablishment message to the UE. For details, refer to S1603 in FIG. 16.

[0235] Optionally, the UE receives the RRC reestablishment message, and can further send an RRC reestablishment complete message to the second access network device, which can be referred to as S1409 in FIG. 16. For example, the second access network device can send the seventh message to the first core network device after receiving the RRC reestablishment message. For example, the second access network device receives the first message, and can send a RETRIEVE UE CONTEXT REQUEST message to the first access network device; after receiving the RETRIEVE UE CONTEXT RESPONSE message, sends the RRC reestablishment message to the UE; and after receiving the RRC reestablishment complete message from the UE, sends the seventh message to the first core network device.

[0236] Optionally, the second access network device can further send eighth information to the UE, and the eighth information can be used for the UE to communicate with the AIoT device, or for the UE to transmit one or more of messages, data or signaling corresponding to the first AIoT service to the AIoT device.

[0237] 4. A fourth sub-implementation of the second optional implementation, which can correspond to FIG. 17.

[0238] In the fourth sub-implementation, the first core network device determines whether to continue to perform the first AIoT service. Optionally, the UE can send seventh information to the first core network device, and the first core network device receives the seventh information, which can be referred to as S1701 in FIG. 17. The seventh information can request or inquire whether to continue to perform the first AIoT service. Optionally, the seventh information can be included in the second message, which is taken as an example in FIG. 17. Optionally, the second message is, for example, a NAS message, which can be transparently transmitted via the second access network device. Optionally, the second message can further include information of the first identifier and / or the first power. Optionally, if the UE communicates with the network by using the protocol stack shown in solution 3, the second message can reach the second core network device, and the second core network device forwards the second message to the first core network device.

[0239] The first core network device receives the seventh information, and can determine whether to continue to perform the first AIoT service, which can be referred to as S1702 in FIG. 17. The first core network device can determine whether to perform the first AIoT service in a manner similar to that of the UE, for example, the first core network device can also determine whether to perform the first AIoT service according to the first area and / or the first power, and the like, and thus no more details are provided herein.

[0240] The first core network device sends first information to the UE, and correspondingly, the UE receives the first information. For details, refer to S1703 in FIG. 17. The first information can indicate to continue to perform the first AIoT service, or indicate not to continue to perform or stop performing the first AIoT service. The UE can determine whether to continue to perform the first AIoT service according to the first information. Optionally, the first information is, for example, a NAS message or is included in a NAS message, and the NAS message can be transparently transmitted via the second access network device. Optionally, if the UE communicates with the network by using the protocol stack shown in solution 3, the first information can be sent to the second core network device first, and then the second core network device forwards the first information to the UE.

[0241] In an embodiment of the present application, it can be considered that S1404 includes S1701-S1703; or it can also be considered that S1404 occurs after S1703. FIG. 17 takes S1404 including S1701-S1703 as an example.

[0242] Optionally, the UE can also perform random access with the second access network device to access the second access network device. The random access procedure can occur before S1404.

[0243] Optionally, after receiving the first message, the second access network device can send a RETRIEVE UE CONTEXT REQUEST message to the first access network device to request to obtain the context of the UE. For details, refer to S1406 in FIG. 17. The first access network device can send a RETRIEVE UE CONTEXT RESPONSE message to the second access network device. For details, refer to S1407 in FIG. 17. The RETRIEVE UE CONTEXT RESPONSE message can include the context of the UE. After receiving the RETRIEVE UE CONTEXT RESPONSE message, the second access network device can send an RRC reestablishment message to the UE. For details, refer to S1603 in FIG. 17. After receiving the RRC reestablishment message, the UE can send an RRC reestablishment complete message to the second access network device. For details, refer to S1409 in FIG. 17.

[0244] Optionally, the second access network device receives the RRC reestablishment complete message, and can send a PATH SWITCH REQUEST message to the first core network device to request switching of a transmission path of data corresponding to the UE. For details, refer to S1410 in FIG. 17. The first core network device receives the PATH SWITCH REQUEST message, and can send a PATH SWITCH REQUEST ACKNOWLEDGE message to the second access network device to confirm or reject switching of the transmission path of data corresponding to the UE. For details, refer to S1411 in FIG. 17. Optionally, the PATH SWITCH REQUEST ACKNOWLEDGE message can include fifth information. For details of the fifth information, refer to the first sub-embodiment.

[0245] Optionally, the second access network device can also send eighth information to the UE. The eighth information can be used for the UE to transmit one or more of messages, data or signaling corresponding to the first AIoT service with the AIoT device, or for the UE to communicate with the AIoT device.

[0246] Optionally, S1406-S1407, S1409-S1411, S1603 and the like can occur before S1701.

[0247] In the embodiments of the present application, whether to continue to perform the first AIoT service can be determined by a network element such as the UE, the first access network device, the second access network device or the first core network device, which is flexible.

[0248] As an optional embodiment, one or more of messages, data or signaling corresponding to the first AIoT service transmitted between the UE and the second access network device can be multiplexed with an existing radio bearer (RB) between the UE and the second access network device, for example, an existing data radio bearer (DRB) and / or signaling radio bearer (SRB) between the UE and the second access network device. Alternatively, the second access network device can configure a dedicated RB for the UE to transmit AIoT services, which can be referred to as a dedicated RB. The dedicated RB can be used to transmit AIoT services, which can include the first AIoT service and / or other AIoT services of the UE. The dedicated RB can include a dedicated DRB and / or a dedicated SRB. For example, the second access network device can send third information to the UE, and the UE receives the third information. For details, refer to S1421 in any one of FIGS. 14-17. The third information can indicate a first RB, which is the dedicated RB. The third information is, for example, an RRC message or included in an RRC message.

[0249] If the UE determines to continue or stop performing the first AIoT service according to the first information, the UE can continue to perform the first AIoT service. For example, the UE can continue to transmit one or more of the messages, data or signaling related to the first AIoT service to the AIoT device, and / or the UE can continue to send one or more of the messages, data or signaling related to the first AIoT service to the network device (e.g., the second access network device and / or the first core network device).

[0250] Or, if the UE determines to continue or stop performing the first AIoT service according to the first information, the UE can continue to perform the first AIoT service. For example, the UE can continue to transmit one or more of the messages, data or signaling related to the first AIoT service to the AIoT device, and / or the UE can continue to send one or more of the messages, data or signaling related to the first AIoT service to the network device (e.g., the second access network device and / or the first core network device).

[0251] For example, the UE can send information A to the second access network device, the information A can comprise one or more of the messages, data or signaling related to the first AIoT service, which can be referred to as S1422 in any one of FIG. 14 to FIG. 17. Taking the first AIoT service as an inventory service for example, the information A is, for example, an inventory report corresponding to the inventory service. The information A is sent, for example, through an RRC message. The second access network device receiving the information A can send information B to the first core network device, which can be referred to as S1423 in any one of FIG. 14 to FIG. 17. The information B is, for example, the information A, or information generated by the second access network device according to the information A. The information B is sent, for example, through an XXAP or NGAP message. The information B can comprise one or more of the messages, data or signaling related to the first AIoT service. Optionally, if the UE adopts solution 1, S1422 can be performed.

[0252] For another example, the UE can send information C to the first core network device, the information C can comprise one or more of the messages, data or signaling related to the first AIoT service, which can be referred to as S1424 in any one of FIG. 14 to FIG. 17. Taking the first AIoT service as an inventory service for example, the information C is, for example, an inventory report corresponding to the inventory service. The information C is sent, for example, through a NAS message, or through a PDU session. Optionally, if the UE adopts solution 2, S1424 can be performed, and the information C can be sent through a NAS message. Or, if the UE adopts solution 3, S1424 can be performed, and the information C can be sent through a PDU session.

[0253] In the embodiments of the present application, in the execution of the first AIoT service, if the UE as the A-IoT-enabled UE requests the second access network device to continue or re-establish the RRC connection, the UE can determine whether to continue to execute the first AIoT service. For example, if the UE determines to continue to execute the first AIoT service, the first AIoT service can be continued to be executed, and the continuity of the first AIoT service can be improved; or if the UE determines not to execute the first AIoT service, the execution of the first AIoT service can be stopped or no longer executed, and the probability of failure of the first AIoT service can be reduced, and the power consumption of the UE can also be saved. It can be seen that the embodiments of the present application provide a processing manner for the AIoT service in the scenario of changing the access network device of the cell, and the behavior of the UE is specified.

[0254] The embodiments of the present application provide a second communication method, please refer to FIG. 18, which is a flowchart of the method.

[0255] S1801, the UE executes the first AIoT service.

[0256] More details about S1801 can be referred to S1401 in the embodiments shown in any one of FIGS. 14-17, and can also be referred to S1402a-S1402f in the embodiments shown in any one of FIGS. 14-17.

[0257] S1802, in the execution of the first AIoT service, the second access network device sends second information, and correspondingly, the UE receives the second information.

[0258] The second information can indicate whether the second access network device is AIoT service, or indicate whether the second access network device has AIoT capability. Optionally, in various embodiments of the present application, having AIoT capability is also understood as AIoT capability or AIoT, for example, being able to execute AIoT service; not having AIoT capability is also understood as not AIoT capability or not AIoT, for example, being unable to execute AIoT service. Hereinafter, taking the second information indicating whether the second access network device has AIoT capability as an example. The AIoT service of one access network device can include supporting any AIoT service, or include supporting a specific AIoT service. In the embodiments of the present application, if one access network device supports AIoT service, the first AIoT service can be supported.

[0259] In the execution of the first AIoT service, or when the first AIoT service has not been executed, the UE can send a first message to the second access network device. Correspondingly, the second access network device receives the first message. The first message can request to continue or re-establish an RRC connection, for example, an RRC connection between the UE and the second access network device. Optionally, the UE sending the first message to the second access network device, for example, includes the UE sending the first message to the second cell. For example, the original serving cell of the UE is the first cell, and the first cell is a cell provided or controlled by the first access network device; the second cell is a cell provided or controlled by the second access network device. The first access network device and the second access network device are different access network devices.

[0260] Optionally, for the understanding of the execution of the first AIoT service or the first AIoT service not being executed, reference can be made to the related introduction of S1403 in the embodiments shown in any one of FIGS. 14-17.

[0261] In the embodiments of the present application, the UE sending the first message can be because the UE has RLF in the first cell or the first access network device, or has reconfiguration failure, or has integrity check failure, etc., and then the UE can send the first message to the second access network device or the second cell.

[0262] Alternatively, the UE sending the first message can also be due to other reasons, and the embodiments of the present application do not limit the reasons for the UE sending the first message.

[0263] The UE changes to the second access network device, or changes to the second cell under the second access network device, and the capability of the second access network device can be the same as or different from the capability of the first access network device. The first access network device AIoT, or has the capability of AIoT; but the second access network device does not necessarily AIoT, or does not necessarily have the capability of AIoT. Therefore, the second access network device can send second information to indicate whether the second access network device has the capability of AIoT; and the UE can determine whether the second access network device has the capability of AIoT according to the second information. Optionally, the second information can be sent by broadcasting, for example, the second information is included in the system information or other broadcast messages.

[0264] Among them, the UE can receive the second information after sending the first message; or the UE can also receive the second information before sending the first message; or the UE can also receive the second information before accessing the second cell or the second access network device; or the UE can also receive the second information after accessing the second cell or the second access network device.

[0265] For example, the UE receives the second information before sending the first message or before accessing the second cell or before accessing the second access network device, and if the second information indicates that the second access network device has the AIoT capability, the UE can send the first message to the second access network device. Alternatively, the UE can continue to perform the first AIoT service after reestablishing or continuing the RRC connection with the second access network device. Alternatively, the UE can determine whether to continue to perform the first AIoT service after reestablishing or continuing the RRC connection with the second access network device, and if it is determined to continue to perform the first AIoT service, the UE can continue to perform the first AIoT service; if it is determined not to continue to perform or to stop performing the first AIoT service, the UE can stop performing the first AIoT service. The UE can determine whether to perform the first AIoT service in the manner shown in any one of the embodiments shown in FIGS. 14-17, and thus will not be described in detail. Alternatively, the UE can release the information related to the first AIoT service, which can have been generated by the UE when performing the first AIoT service in the first access network device. Alternatively, the UE can store the information related to the first AIoT service, or the UE can send the information related to the first AIoT service to the second access network device. For example, if the UE continues to perform the first AIoT service, the UE can send the information related to the first AIoT service to the second access network device; or if the UE does not continue to perform or stops performing the first AIoT service, the UE can store or release the information related to the first AIoT service; or even if the UE does not continue to perform or stops performing the first AIoT service, the UE can send the information related to the first AIoT service to the second access network device because the second access network device has the AIoT capability. The information related to the first AIoT service can include one or more of the messages, data or signaling related to the first AIoT service. Taking the first AIoT service as an inventory service as an example, the information related to the first AIoT service can include an inventory report.

[0266] For example, the UE receives the second information after sending the first message or after accessing the second cell or after accessing the second access network device, and if the second information indicates that the second access network device has the AIoT capability, the UE can continue to perform the first AIoT service. Alternatively, the UE can first determine whether to continue to perform the first AIoT service, and if it is determined to continue to perform the first AIoT service, the UE can continue to perform the first AIoT service; if it is determined not to continue to perform or to stop performing the first AIoT service, the UE can stop performing the first AIoT service. Alternatively, the UE can release the information related to the first AIoT service, which can have been generated by the UE in performing the first AIoT service in the first access network device. Alternatively, the UE can store the information related to the first AIoT service, or the UE can send the information related to the first AIoT service to the second access network device. For example, if the UE continues to perform the first AIoT service, the UE can send the information related to the first AIoT service to the second access network device; or if the UE does not continue to perform or stops performing the first AIoT service, the UE can store or release the information related to the first AIoT service; or even if the UE does not continue to perform or stops performing the first AIoT service, the UE can send the information related to the first AIoT service to the second access network device because the second access network device has the AIoT capability.

[0267] For example, the UE receives the second information before sending the first message or before accessing the second cell or before accessing the second access network device, and if the second information indicates that the second access network device does not have the AIoT capability, the UE can have different processing manners.

[0268] As the first optional processing manner of the UE, the UE can not send the first message to the second access network device, or can not access the second cell or the second access network device, or the UE can not access any cell under the second access network device. For example, the UE can send a ninth message to the third access network device, which can be referred to as S1803. The ninth message can be used to continue or re-establish the RRC connection, which can be the RRC connection between the UE and the third access network device. Optionally, the UE sends the ninth message to the third access network device, for example, the UE sends the ninth message to the third cell, and the third cell is a cell provided or controlled by the third access network device. Among them, the third access network device can have AIoT capability (for example, the UE can receive information B from the third access network device, and the information B can indicate that the third access network device has AIoT capability. The implementation of the information B is similar to the second information). That is, if the second access network device does not have AIoT capability, the UE can not re-establish or continue the RRC connection with the second access network device, but reselects the access network device with AIoT capability, thereby improving the probability of continuing the first AIoT service.

[0269] After the UE sends the ninth message to the third access network device or accesses the third cell or the third access network device, the UE can continue to execute the first AIoT service. Alternatively, after the UE sends the ninth message to the third access network device or accesses the third cell or the third access network device, the UE can first determine whether to continue to execute the first AIoT service, which can be referred to as S1804. If it is determined to continue to execute the first AIoT service, the UE can continue to execute the first AIoT service; if it is determined not to continue to execute or stop to execute the first AIoT service, the UE can stop to execute the first AIoT service. The determination manner of the UE can refer to the manner of the UE determining whether to execute the first AIoT service in the embodiments shown in any one of FIGS. 14-17, which will not be described in detail here.

[0270] If the second information indicates that the second access network device has no AIoT capability, as a second optional processing manner of the UE, the UE can still send the first message to the second access network device or access the second cell or access the second access network device, for which reference can be made to S1805. For example, the UE has no other optional cell or access network device, or other services provided by the second access network device can meet the demand of the UE, etc., so that the UE can still send the first message to the second access network device or access the second cell or access the second access network device even if the second access network device has no AIoT capability. In this case, the first AIoT service cannot continue to be executed. If the UE has generated one or more of the corresponding messages, data or signaling in executing the first AIoT service under the first access network device, the UE can release the first AIoT service related information, or the UE can store the first AIoT service related information, for which reference can be made to S1806. Among them, the UE can first send the first message to the second access network device or access the second cell or access the second access network device, and then release or store the first AIoT service related information; or the UE can first release or store the first AIoT service related information, and then send the first message to the second access network device or access the second cell or access the second access network device; or the UE sends the first message to the second access network device or accesses the second cell or accesses the second access network device, and releases or stores the first AIoT service related information, both of which can be executed simultaneously. Among them, the first AIoT service related information can include one or more of the first AIoT service related messages, data or signaling.

[0271] As an optional implementation for the UE to store the first AIoT service related information, the UE can store the first AIoT service related information for a first time duration, for example, the UE can maintain the first time duration by using a timer or a counter, etc. The starting time of the timer or the counter is, for example, when the UE leaves the first cell, or when the UE successfully accesses the second cell, or when the UE disconnects from the first cell, or when the UE determines that the second access network device has no AIoT capability (for example, when the second information is received), or when the UE sends the first message. When the first time duration has not arrived, the UE can continue to perform cell measurement to determine whether there is a switchable target cell. When the first time duration arrives, if the UE has not sent a message for continuing or re-establishing the RRC connection to the AIoT capable access network device, the UE can release the first AIoT service related information to save storage space. Alternatively, before the first time duration arrives, if the UE sends a message for continuing or re-establishing the RRC connection to the AIoT capable access network device, or the UE accesses the AIoT capable access network device, for example, the UE sends a message for continuing or re-establishing the RRC connection to the fifth access network device, or the UE accesses the fifth access network device or the fifth cell, the fifth cell is a cell provided or controlled by the fifth access network device, and the fifth access network device has AIoT capability, then optionally, the UE can not release the first AIoT service related information. For example, the UE can send the first AIoT service related information to the fifth access network device. For details about the UE sending a message to the fifth access network device (or the fifth cell), etc., please refer to the relevant description of the UE sending the first message to the second access network device. For example, the UE receives information D from the fifth access network device, the information D indicates that the fifth access network device has AIoT capability, then the UE can send the first message to the fifth access network device, or can access the fifth access network device or the fifth cell.

[0272] For example, if the UE sends a message for continuing or re-establishing the RRC connection to the fifth access network device, or the UE accesses the fifth access network device or the fifth cell, the UE can continue to perform the first AIoT service. Alternatively, after the UE sends a message for continuing or re-establishing the RRC connection to the fifth access network device, or the UE accesses the fifth access network device or the fifth cell, the UE can first determine whether to continue to perform the first AIoT service. If it is determined to continue to perform the first AIoT service, the UE can continue to perform the first AIoT service; if it is determined not to continue to perform or to stop performing the first AIoT service, the UE can stop performing the first AIoT service. If the UE continues to perform the first AIoT service, the UE can send the first AIoT service related information to the fifth access network device; or if the UE does not continue to perform or stops performing the first AIoT service, the UE can not send the first AIoT service related information to the fifth access network device, for example, the UE can continue to store the first AIoT service related information, or can also release the first AIoT service related information; or even if the UE does not continue to perform or stops performing the first AIoT service, the UE can send the first AIoT service related information to the fifth access network device. The determination manner of the UE can refer to the manner of determining whether to perform the first AIoT service in the embodiments shown in any one of FIGS. 14-17, which will not be described herein.

[0273] As another optional implementation of the UE storing the first AIoT service related information, the UE can store the first AIoT service related information in a time-unaware manner, for example, until the UE sends a message for continuing or re-establishing the RRC connection to the AIoT capable access network device, or until the UE accesses the AIoT capable access network device. For example, after the UE stores the first AIoT service related information, the UE can continue to perform cell measurement to determine whether there is a target cell. For example, the UE sends a message for continuing or re-establishing the RRC connection to the AIoT capable access network device (e.g., the fourth access network device), or the UE accesses the AIoT capable access network device (e.g., the fourth access network device) or the fourth cell, which is a cell provided or controlled by the fourth access network device, and the fourth access network device is AIoT capable, then optionally, the UE can not release the first AIoT service related information. For example, the UE can send the first AIoT service related information to the fourth access network device. For details about the UE sending the message for continuing or re-establishing the RRC connection to the fourth access network device, etc., please refer to the relevant introduction of the UE sending the first message to the second access network device. For example, the UE receives the fourth information from the fourth access network device, and the fourth information indicates that the fourth access network device is AIoT capable, then the UE can send a message for continuing or re-establishing the RRC connection to the fourth access network device, or the UE can access the fourth access network device or the fourth cell.

[0274] For example, if the UE sends a message for continuing or re-establishing the RRC connection to the fourth access network device, or the UE accesses the fourth access network device or the fourth cell, the UE can continue to perform the first AIoT service. Alternatively, after the UE sends the message for continuing or re-establishing the RRC connection to the fourth access network device, or the UE accesses the fourth access network device or the fourth cell, the UE can first determine whether to continue to perform the first AIoT service. If it is determined to continue to perform the first AIoT service, the UE can continue to perform the first AIoT service; if it is determined not to continue to perform or to stop performing the first AIoT service, the UE can stop performing the first AIoT service. If the UE continues to perform the first AIoT service, the UE can send the first AIoT service related information to the fourth access network device; or if the UE does not continue to perform or stops performing the first AIoT service, the UE can not send the first AIoT service related information to the fourth access network device, for example, the UE can continue to store the first AIoT service related information, or can also release the first AIoT service related information; or even if the UE does not continue to perform or stops performing the first AIoT service, the UE can send the first AIoT service related information to the fourth access network device. The determination manner of the UE can refer to the manner of determining whether to perform the first AIoT service in the embodiments shown in any one of FIGS. 14-17, which will not be described herein.

[0275] Optionally, if the UE and the network perform the first AIoT service by using the solution 1 described above, and the first AIoT service needs the support of the access network device, the solution of the embodiment of the present application can be performed. Alternatively, if the UE and the network perform the first AIoT service by using the solution 2 or the solution 3 described above, the information related to the first AIoT service can be sent through the NAS message or the PDU session, and the access network device only transmits the information related to the first AIoT service and does not need the AIoT service. Therefore, if the UE and the network perform the first AIoT service by using the solution 2 or the solution 3 described above, the solution of the embodiment of the present application can not be performed. For example, if the UE and the network perform the first AIoT service by using the solution 2 or the solution 3 described above, after the UE sends the first message to the second access network device, the UE can continue to perform the first AIoT service. Alternatively, after the UE sends the first message to the second access network device, the UE can first determine whether to continue to perform the first AIoT service. If it is determined to continue to perform the first AIoT service, the UE can continue to perform the first AIoT service; if it is determined not to continue to perform or stop to perform the first AIoT service, the UE can stop to perform the first AIoT service. If the UE continues to perform the first AIoT service, the UE can send the information related to the first AIoT service to the first core network device; or if the UE does not continue to perform or stop to perform the first AIoT service, the UE can not send the information related to the first AIoT service to the first core network device, for example, the UE can store the information related to the first AIoT service, or can also release the information related to the first AIoT service; or even if the UE does not continue to perform or stop to perform the first AIoT service, the UE can send the information related to the first AIoT service to the first core network device. The determination manner of the UE can refer to the manner in which the UE determines whether to perform the first AIoT service in the embodiment shown in any one of FIGS. 14 to 17, and details are not described herein.

[0276] In the execution of the first AIoT service, if the UE requests the access network device without AIoT capability to continue or re-establish the RRC connection, the behavior of the UE is not clear, for example, the UE cannot determine whether the first AIoT service continues to be performed, and cannot determine how the information related to the first AIoT service should be processed. In this case, the UE can have problems such as data transmission error. Therefore, the second information of the access network device makes the UE clear whether the second access network device has AIoT capability, the behavior of the UE is clear, the data transmission of the UE can be ensured to be accurate, and the continuity of the AIoT service can be improved.

[0277] The third communication method is provided in the embodiments of the present application, and a flowchart of the method is shown in FIG. 19.

[0278] S1901, the UE performs the first AIoT service.

[0279] More details about S1901 can be referred to S1401 in any of the embodiments shown in FIG. 14-17, and can also be referred to S1402a-S1402f in any of the embodiments shown in FIG. 14-17.

[0280] S1902, during the execution of the first AIoT service, the UE occurs RLF.

[0281] For example, the UE occurs RLF in the first cell or the first access network device. Alternatively, S1902 can also be replaced by, during the execution of the first AIoT service, the UE occurs reconfiguration failure, for example, the UE occurs reconfiguration failure in the first cell or the first access network device. Alternatively, S1902 can also be replaced by, during the execution of the first AIoT service, the UE occurs integrity check failure, for example, the UE occurs integrity check failure in the first cell or the first access network device.

[0282] S1903, the UE stops performing the first AIoT service.

[0283] Optionally, performing the first AIoT service includes one or more of the following: reporting one or more of messages, data or signaling corresponding to the first AIoT service to the network, transmitting one or more of messages, data or signaling corresponding to the first AIoT service to the AIoT device, or being an A-IoT-enabled UE of the first AIoT service. Therefore, in S1903, the UE stops performing the first AIoT service can include that the UE stops performing one or more of the above.

[0284] The UE transmits one or more of messages, data, or signaling corresponding to the first AIoT traffic with the AIoT device, for example, the UE transmits one or more of messages, data, or signaling corresponding to the first AIoT traffic according to a configuration corresponding to the first AIoT traffic and / or a first context. The configuration corresponding to the first AIoT traffic can include, for example, an AIoT AS (Access Stratum) configuration, which can be used to configure the UE to perform AIoT traffic (e.g., the first AIoT traffic) with the AIoT device according to the AIoT AS configuration. Optionally, the AIoT AS configuration can include, for example, a configuration of AIoT radio resources, which can be used for the UE to communicate with the AIoT device, for example, to transmit one or more of messages, data, or signaling corresponding to the AIoT traffic (e.g., the first AIoT traffic) with the AIoT device. Optionally, in various embodiments of the present application, the AIoT AS configuration can be replaced by an AIoT radio configuration or an AIoT radio interface configuration, etc.

[0285] The first context is a context of the UE, which can be used for communication between the UE and the AIoT device, for example, the first context is related to the AIoT traffic (e.g., the first AIoT traffic). For example, the first context can be used for the UE to transmit one or more of messages, data, or signaling corresponding to the AIoT traffic (e.g., the first AIoT traffic) with the AIoT device. Optionally, the UE can also correspond to a second context, which can be used for communication between the UE and a network device (e.g., an access network device and / or a core network device). For example, the context of the UE can include the first context and the second context.

[0286] As an optional implementation, the UE can release the configuration corresponding to the first AIoT traffic, and / or release the first context. For example, the UE can release the AIoT AS configuration, and / or release the first context. Since the UE has stopped performing the first AIoT traffic, the UE can release the configuration and / or the context related to the first AIoT traffic, thereby saving the storage space of the UE.

[0287] Optionally, the UE can perform cell selection or cell reselection to resume the communication. For example, the UE enters a second cell, e.g., a cell provided or controlled by a second access network device, through the cell selection or the cell reselection. Optionally, the UE can initiate RRC reestablishment in the second cell to reestablish the RRC connection with the second cell. Before the cell selection or the cell reselection, the UE accesses a first cell, e.g., a cell provided or controlled by a first access network device. The first access network device and the second access network device can be the same access network device or different access network devices. If the first access network device and the second access network device are the same access network device, the first cell and the second cell can be the same cell or different cells. If the first access network device and the second access network device are different access network devices, the first cell and the second cell can be different cells. That is, the embodiments of the present application do not limit the cell selection or the cell reselection process of the UE. The UE can select or reselect to the original cell, or select or reselect to a new cell under the original access network device, or select or reselect to a new cell under a new access network device.

[0288] In the embodiments of the present application, if the RLF, the reconfiguration failure or the integrity check failure occurs, the UE can stop the first AIoT service being executed to reduce the probability of the first AIoT service error.

[0289] The fourth communication method is provided in the embodiments of the present application. Please refer to FIG. 20 for the flowchart of the method.

[0290] S2001, the UE executes the first AIoT service.

[0291] For more information about S2001, please refer to S1401 in the embodiments shown in any one of FIG. 14 to FIG. 17, and also refer to S1402a to S1402f in the embodiments shown in any one of FIG. 14 to FIG. 17.

[0292] S2002, during the execution of the first AIoT service, the UE occurs the RLF.

[0293] For example, the UE has RLF in the first cell or the first access network device. Or S2002 can also be replaced by that the UE has reconfiguration failure in the first AIoT service execution, for example, the UE has reconfiguration failure in the first cell or the first access network device. Or S2002 can also be replaced by that the UE has integrity check failure in the first AIoT service execution, for example, the UE has integrity check failure in the first cell or the first access network device.

[0294] S2003, the UE suspends the first AIoT service.

[0295] Optionally, performing the first AIoT service includes one or more of the following: reporting one or more of messages, data or signaling corresponding to the first AIoT service to the network, transmitting one or more of messages, data or signaling corresponding to the first AIoT service with the AIoT device, or being an A-IoT-enabled UE of the first AIoT service. Therefore, in S2003, the UE suspending the first AIoT service can include the UE suspending one or more of the above.

[0296] In the transmitting one or more of messages, data or signaling corresponding to the first AIoT service with the AIoT device, for example, the UE transmits one or more of messages, data or signaling corresponding to the first AIoT service according to the configuration corresponding to the first AIoT service and / or the first context. For the configuration corresponding to the first AIoT service and the features of the context of the UE, refer to S1902 in the embodiment shown in FIG. 19.

[0297] As an optional implementation, the UE can suspend the configuration corresponding to the first AIoT service and / or suspend the first context. For example, the UE can suspend the AIoT AS configuration and / or suspend the first context. Since the UE only suspends the first AIoT service and does not stop performing the first AIoT service, the UE can suspend the configuration and / or context related to the first AIoT service, similar to "live protection". If the UE continues to perform the first AIoT service subsequently, the UE can continue to perform the first AIoT service by resuming using the configuration and / or context related to the first AIoT service, without having to reconfigure again, which can improve the execution efficiency of the first AIoT service and reduce configuration overhead.

[0298] Optionally, the UE can perform cell selection or cell reselection to resume the communication. For example, the UE enters a second cell, e.g., a cell provided or controlled by a second access network device, by cell selection or cell reselection. Optionally, the UE can initiate RRC reestablishment in the second cell to reestablish the RRC connection with the second cell. Before the cell selection or cell reselection, the UE accesses a first cell, e.g., a cell provided or controlled by a first access network device. The first access network device and the second access network device can be the same access network device or different access network devices. If the first access network device and the second access network device are the same access network device, the first cell and the second cell can be the same cell or different cells. If the first access network device and the second access network device are different access network devices, the first cell and the second cell can be different cells. That is, the embodiments of the present application do not limit the cell selection or reselection process of the UE. The UE can select or reselect to the original cell, or select or reselect to a new cell under the original access network device, or select or reselect to a new cell under a new access network device.

[0299] After the UE enters the second cell, the UE can optionally receive an eleventh message from the second cell (or the second access network device). The eleventh message can indicate to resume the first AIoT service, or indicate to stop the first AIoT service, or indicate the configuration corresponding to the first AIoT service, etc.

[0300] The second access network device and the first access network device are the same access network device. In this scenario, the eleventh message indicates to resume the first AIoT service, or indicates to stop the first AIoT service. For example, the second access network device does not release or remove the configuration corresponding to the first AIoT service, or the second access network device reconfigures the configuration corresponding to the first AIoT service, and the second access network device can send the eleventh message to indicate to resume the first AIoT service. For another example, the second access network device releases or removes the configuration corresponding to the first AIoT service, and the second access network device can send the eleventh message to indicate to stop the first AIoT service.

[0301] Alternatively, the second access network device is different from the first access network device. In this scenario, the eleventh message can indicate to stop the first AIoT service, or indicate the configuration corresponding to the first AIoT service, or indicate to resume the first AIoT service, and the like. For example, if the second access network device does not have the AIoT capability, and / or the second access network device determines that the first AIoT service cannot be performed according to the first area, the second access network device can indicate to stop the first AIoT service through the eleventh message. For another example, if the second access network device has the AIoT capability, and / or the second access network device determines that the first AIoT service can be performed according to the first area, the second access network device can indicate the configuration corresponding to the first AIoT service through the eleventh message, which can be understood as that the second access network device configures the UE with parameters for performing the first AIoT service, so that the UE can continue to perform the first AIoT service.

[0302] The first area can be an area related to the first AIoT service. For example, the first AIoT service is a stocktaking service, and the first area can refer to a stocktaking area. The second access network device determines whether the first AIoT service can be continued according to the first area, for example, if the UE moves out of the first area, the first AIoT service cannot be continued; or if the UE does not move out of the first area (or, the UE is located in the first area), the first AIoT service can be continued.

[0303] Optionally, if the second access network device indicates the UE to stop performing the first AIoT service, the UE can stop performing the first AIoT service. For example, the UE can also release the configuration corresponding to the first AIoT service, and / or release the first context. The introduction related to the UE stopping performing the first AIoT service, and releasing, and the like can refer to the embodiment shown in FIG. 19.

[0304] Optionally, if the second access network device indicates the UE to resume the first AIoT service, the UE can continue to perform the first AIoT service. For example, the UE can resume the configuration corresponding to the first AIoT service and / or the first context which are suspended, so as to perform the first AIoT service according to the configuration corresponding to the first AIoT service and / or the first context.

[0305] Optionally, if the second access network device indicates the configuration corresponding to the first AIoT service, the UE can release the configuration corresponding to the first AIoT service and / or the first context which are suspended, and perform the first AIoT service according to the configuration indicated by the second access network device.

[0306] In the embodiments of the present application, if the RLF, the reconfiguration failure or the integrity check failure occurs, the UE can suspend the first AIoT service being executed, so as to reduce the probability of the first AIoT service error. Moreover, the UE only suspends the first AIoT service, for example, does not release the configuration related to the first AIoT service, and the like. When the UE can continue to execute the first AIoT service, the UE does not need to reconfigure, but only resumes the related configuration that is suspended, so as to improve the execution efficiency of the first AIoT service.

[0307] The fifth communication method is provided in the embodiments of the present application, and a flowchart of the method is shown in FIG. 21.

[0308] S2101, the UE executes the first AIoT service.

[0309] For more details about S2101, refer to S1401 in the embodiments shown in any one of FIGS. 14-17, and refer to S1402a-S1402f in the embodiments shown in any one of FIGS. 14-17.

[0310] S2102, in the execution of the first AIoT service, the UE occurs RLF.

[0311] For example, the UE occurs RLF in the first cell or the first access network device. Alternatively, in the execution of the first AIoT service, the UE occurs reconfiguration failure, for example, the UE occurs reconfiguration failure in the first cell or the first access network device. Alternatively, in the execution of the first AIoT service, the UE occurs integrity check failure, for example, the UE occurs integrity check failure in the first cell or the first access network device.

[0312] S2103, the UE performs cell selection or cell reselection, and enters the second cell.

[0313] The UE can perform cell selection or cell reselection to recover the communication. For example, through the cell selection or the cell reselection, the UE enters the second cell, and the second cell is provided or controlled by the second access network device. Optionally, the UE can initiate RRC reestablishment in the second cell to reestablish the RRC connection with the second cell.

[0314] S2104, if the second cell is different from the first cell, the UE stops executing the first AIoT service, or suspends the first AIoT service.

[0315] The first cell accessed by the UE before performing cell selection or cell reselection is a cell provided or controlled by a first access network device. The first access network device and the second access network device can be the same access network device or different access network devices. If the first access network device and the second access network device are the same access network device, the first cell and the second cell can be the same cell or different cells. If the first access network device and the second access network device are different access network devices, the first cell and the second cell can be different cells. That is, the embodiments of the present application do not limit the cell selection or reselection process of the UE. The UE can select or reselect to the original cell, or select or reselect to a new cell under the original access network device, or can select or reselect to a new cell under a new access network device.

[0316] S2104 can include, if the second cell is a different cell from the first cell, and / or if the first access network device and the second access network device are different access network devices, the UE can stop performing the first AIoT service or suspend the first AIoT service. It can be understood that if the UE changes the cell and / or changes the access network device, the UE can stop performing the first AIoT service or can suspend the first AIoT service. Optionally, for the UE to stop performing the first AIoT service, and optional related processing (such as releasing the corresponding configuration, etc.) of stopping performing the first AIoT service, please refer to the introduction of the embodiment shown in FIG. 19. For the UE to suspend performing the first AIoT service, and optional related processing (such as suspending the corresponding AIoT configuration, etc.) of suspending performing the first AIoT service, please refer to the introduction of the embodiment shown in FIG. 20.

[0317] Optionally, if the second cell is the same cell as the first cell, the UE can continue to perform the first AIoT service. For example, the UE can continue to perform the first AIoT service using the configuration corresponding to the first AIoT service and / or the first context, etc. For features of the configuration corresponding to the first AIoT service and / or the first context, please refer to the introduction of the embodiment shown in FIG. 19.

[0318] In the embodiments of the present application, if the UE changes the cell and / or the access network device, the first AIoT service can be stopped or suspended to reduce the probability of error of the first AIoT service.

[0319] The sixth communication method is provided in the embodiments of the present application, please refer to FIG. 22 for the flowchart of the method.

[0320] S2201, the UE performs the first AIoT service.

[0321] More details about S2201 can be referred to S1401 in any of the embodiments of FIG. 14 to FIG. 17, and can also be referred to S1402a-S1402f in any of the embodiments of FIG. 14 to FIG. 17.

[0322] S2202, in the first AIoT service execution, the UE has RLF, the UE starts a first timer. For example, the UE can start the first timer when or after the RLF occurs, and the first timer can be used for the UE to execute the first AIoT service.

[0323] For example, the UE has RLF in the first cell or the first access network device. Alternatively, the "RLF of the UE" in S2202 can be replaced by reconfiguration failure of the UE, for example, the UE has reconfiguration failure in the first cell or the first access network device. Alternatively, the "RLF of the UE" in S2202 can be replaced by integrity check failure of the UE, for example, the UE has integrity check failure in the first cell or the first access network device.

[0324] S2203, during running of the first timer, the UE continues to execute the first AIoT service.

[0325] It can be understood that although the UE has RLF or reconfiguration failure or integrity check failure, etc., since the first AIoT service has not been completed, the UE can continue to execute the first AIoT service during running of the first timer, so as to reduce the impact on the first AIoT service and maximize the continuity of the first AIoT service. During running of the first timer, for example, the UE can continue to execute the first AIoT service using the configuration corresponding to the first AIoT service and / or the first context, etc., and the features of the configuration corresponding to the first AIoT service and / or the first context, etc. can be referred to the introduction of the embodiment shown in FIG. 19.

[0326] Optionally, in the case of RLF or reconfiguration failure or integrity check failure, the UE can perform cell selection or cell reselection in addition to starting the first timer to restore communication. For example, through cell selection or cell reselection, the UE enters a second cell, for example, a cell provided or controlled by a second access network device.

[0327] The UE accesses the first cell before performing cell selection or cell reselection. The first cell is a cell provided or controlled by the first access network device. The first access network device and the second access network device can be the same access network device or different access network devices. If the first access network device and the second access network device are the same access network device, the first cell and the second cell can be the same cell or different cells. If the first access network device and the second access network device are different access network devices, the first cell and the second cell can be different cells. That is, the embodiments of the present application do not limit the cell selection or reselection process of the UE. The UE can select or reselect to the original cell, or select or reselect to a new cell under the original access network device, or can select or reselect to a new cell under a new access network device.

[0328] Optionally, the UE can initiate RRC reestablishment in the second cell to reestablish the RRC connection with the second cell. When or after the RRC reestablishment is successful, the UE can stop the first timer. Optionally, after the UE stops the first timer, the UE can stop performing the first AIoT service or suspend the first AIoT service. Optionally, after the RRC reestablishment is successful, the UE can receive an eleventh message from the second cell (or the second access network device), and the eleventh message can indicate to resume the first AIoT service, or indicate to stop the first AIoT service, or indicate the configuration corresponding to the first AIoT service, and the related content can be referred to the related description of the embodiment shown in FIG. 20.

[0329] If the first timer expires (the first timer can expire when the RRC reestablishment process has not been completed, or can expire when the RRC reestablishment process has not been performed, or can expire when the cell reselection or cell selection is performed, or can expire when the cell reselection or cell selection has not been performed, and the like, which is not limited), the UE can stop performing the first AIoT service or suspend the first AIoT service. Optionally, the UE stopping performing the first AIoT service and the optional related processing (such as releasing the corresponding configuration, and the like) of stopping performing the first AIoT service can be referred to the description of the embodiment shown in FIG. 19. The UE suspending performing the first AIoT service and the optional related processing (such as suspending the corresponding configuration, and the like) of suspending performing the first AIoT service can be referred to the description of the embodiment shown in FIG. 20.

[0330] In the embodiments of the present application, if the UE has RLF, reconfiguration failure or integrity check failure, the UE can still perform the first AIoT service during the running of the first timer to improve the continuity of the first AIoT service. When the first timer stops or times out, the UE can stop or suspend the first AIoT service, so that the execution time of the first AIoT service is more reasonable.

[0331] Optionally, in various embodiments of the present application, if the access network device (for example, the first access network device and / or the second access network device) is a CU DU separation architecture, after the CU receives the xxAP / NGAP message sent by the core network device (for example, the first core network device or the second core network device), the CU can forward the xxAP message / NGAP to the DU through the F1AP message, or send the AIoT related information contained in the xxAP / NGAP message to the DU through the F1AP message. After the DU receives the RRC message sent by the UE, the DU can forward the RRC message to the CU through the F1AP message, or send the AIoT information contained in the RRC message to the CU through the F1AP message.

[0332] In this scheme, the XXAP / NGAP message transmitted on the F1 interface F1AP and the xxAP / NGAP message transmitted on the XX / NG interface can be different, that is, the CU can perform relevant processing on the message, which can include one or more of the following: deleting, filtering, mapping, modifying, or adding auxiliary information. Based on this scheme, the access network device under the CU-DU separation architecture can also implement the method provided in various embodiments of the present application.

[0333] FIG. 23 shows a structural schematic diagram of a communication apparatus provided in an embodiment of the present application. The communication apparatus 2300 can be the UE or the circuitry of the UE in the embodiments described with reference to any one of FIGs. 14-17, 18-22, for implementing the methods corresponding to the UE in the above method embodiments. Alternatively, the communication apparatus 2300 can be the second access network device or the circuitry of the second access network device in the embodiments described with reference to any one of FIGs. 14-17, 18-22, for implementing the methods corresponding to the second access network device in the above method embodiments. Alternatively, the communication apparatus 2300 can be the first access network device or the circuitry of the first access network device in the embodiments described with reference to any one of FIGs. 14-17, 18-22, for implementing the methods corresponding to the first access network device in the above method embodiments. Alternatively, the communication apparatus 2300 can be the first core network device or the circuitry of the first core network device in the embodiments described with reference to any one of FIGs. 14-17, 18-22, for implementing the methods corresponding to the first core network device in the above method embodiments. Alternatively, the communication apparatus 2300 can be the second core network device or the circuitry of the second core network device in the embodiments described with reference to any one of FIGs. 14-17, 18-22, for implementing the methods corresponding to the second core network device in the above method embodiments. For example, one circuitry can be a chip system.

[0334] The communication apparatus 2300 includes at least one processor 2301. The processor 2301 can be used for internal processing of the apparatus, to implement certain control processing functions. Optionally, the processor 2301 includes instructions. Optionally, the processor 2301 can store data. Optionally, different processors can be independent devices, can be located in different physical locations, and can be located on different integrated circuits. Optionally, different processors can be integrated in one or more processors, for example, integrated on one or more integrated circuits.

[0335] Optionally, the communication apparatus 2300 includes one or more memories 2303 for storing instructions. Optionally, the memories 2303 can also store data. The processor and the memory can be separately provided, or integrated together.

[0336] Optionally, the communication apparatus 2300 includes a communication line 2302 and at least one communication interface 2304. Since the memory 2303, the communication line 2302, and the communication interface 2304 are all optional, they are all represented by dashed lines in FIG. 23.

[0337] Optionally, the communication device 2300 can also include a transceiver and / or an antenna. The transceiver can be configured to transmit information to other devices or receive information from other devices. The transceiver can be referred to as a transceiver, transceiver circuit, input / output interface, etc., and can be configured to implement the transceiving function of the communication device 2300 through the antenna. Optionally, the transceiver includes a transmitter and a receiver. Illustratively, the transmitter can be configured to generate a radio frequency signal from a baseband signal, and the receiver can be configured to convert a radio frequency signal into a baseband signal.

[0338] The processor 2301 can include a general purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs of the solutions of the present application.

[0339] The communication line 2302 can include a path for transmitting information between the above-mentioned components.

[0340] The communication interface 2304 can be configured to communicate with other devices or communication networks using any transceiver-type device, such as an Ethernet, a radio access network (RAN), a wireless local area network (WLAN), a wired access network, etc.

[0341] The memory 2303 can 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, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, a magnetic disk storage or other magnetic storage devices, or any other medium capable of storing desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to this. The memory 2303 can exist independently, and is connected to the processor 2301 through the communication line 2302. Alternatively, the memory 2303 can be integrated with the processor 2301.

[0342] The memory 2303 is configured to store computer-executable instructions for implementing the solutions of the present application, and the processor 2301 is configured to control the execution of the computer-executable instructions stored in the memory 2303. The processor 2301 is configured to execute the steps performed by the first access network device or the second access network device or the first core network device or the second core network device or the UE in the embodiments shown in any one of FIGS. 14-17 and FIGS. 18-22, by executing the computer-executable instructions stored in the memory 2303.

[0343] Optionally, the computer-executable instructions in the embodiments of the present application can also be referred to as application program codes, and the embodiments of the present application are not limited in this regard.

[0344] In specific implementation, as an embodiment, the processor 2301 can include one or more CPUs, such as CPU0 and CPU1 in FIG. 23.

[0345] In specific implementation, as an embodiment, the communication apparatus 2300 can include multiple processors, such as the processor 2301 and the processor 2305 in FIG. 23. Each of these processors can be a single-CPU processor or a multi-CPU processor. The processor herein can refer to one or more devices, circuits, and / or processing cores for processing data (for example, computer program instructions).

[0346] When the apparatus shown in FIG. 23 is a chip, for example, a chip of the first access network device or a chip of the second access network device or a chip of the first core network device or a chip of the second core network device or a chip of the UE, the chip includes the processor 2301 (may also include the processor 2305), the communication line 2302, and the communication interface 2304, and optionally, the chip includes the memory 2303. Specifically, the communication interface 2304 can be an input interface, a pin, or a circuit, etc. The memory 2303 can be a register, a cache, etc. The processor 2301 and the processor 2305 can be a general-purpose CPU, a microprocessor, an ASIC, or one or more integrated circuits for executing programs for controlling the communication method of any of the above embodiments.

[0347] The embodiments of the present application can divide the functional modules of the apparatus according to the above method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be realized in the form of hardware or in the form of a software functional module. In the embodiments of the present application, the division of the modules is illustrative and is only a logical function division. In actual implementation, another division manner can be used. For example, in the case of dividing each functional module according to each function, FIG. 21 is a schematic diagram of an apparatus 2400. The apparatus 2400 can be the first access network device or the second access network device or the first core network device or the second core network device or the UE, or a chip in the first access network device or a chip in the second access network device or a chip in the first core network device or a chip in the second core network device or a chip in the UE. The apparatus 2400 includes a processing unit 2402 and a transceiver unit 2401.

[0348] It should be understood that the apparatus 2400 can be used to implement the steps performed by the first access network device or the second access network device or the first core network device or the second core network device or the UE in the communication method of the embodiments of the present application. The related features can be referred to the embodiments shown in any one of FIGS. 14-17 and FIGS. 18-22, which will not be described herein.

[0349] Optionally, the functions / implementation processes of the transceiver unit 2401 and the processing unit 2402 in FIG. 24 can be realized by the processor 2301 in FIG. 23 invoking computer-executable instructions stored in the memory 2303. Alternatively, the functions / implementation processes of the processing unit 2402 in FIG. 24 can be realized by the processor 2301 in FIG. 23 invoking computer-executable instructions stored in the memory 2303, and the functions / implementation processes of the transceiver unit 2401 in FIG. 24 can be realized by the communication interface 2304 in FIG. 23.

[0350] Optionally, when the apparatus 2400 is a chip or circuit, the function / implementation process of the transceiver unit 2401 can also be implemented through a pin or circuit, etc. Optionally, the transceiver unit 2401 can include a sending unit and / or a receiving unit, the sending unit is used to implement the sending function, and the receiving unit is used to implement the receiving function; or the transceiver unit 2401 can be an integral module, which can implement the sending function and / or the receiving function. Optionally, the transceiver unit 2401 can be implemented through a transceiver.

[0351] The application further provides a computer readable storage medium, which stores a computer program or instructions, when the computer program or instructions are executed, the method executed by the first access network device or the second access network device or the first core network device or the second core network device or the UE in the foregoing method embodiments is implemented. In this way, the functions described in the above embodiments can be implemented in the form of software function units and sold or used as independent products. Based on this understanding, the technical solutions of the application can be embodied in the form of a software product in essence or the part that contributes or part of the technical solutions. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the application. The storage medium includes a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk, and various media that can store program codes.

[0352] The application further provides a computer program product, which includes computer program codes, when the computer program codes are executed on a computer, the computer executes the method executed by the first access network device or the second access network device or the first core network device or the second core network device or the UE in any of the foregoing method embodiments.

[0353] The embodiments of the application further provide a processing apparatus, which includes a processor and an interface; the processor is used to execute the method executed by the first access network device or the second access network device or the first core network device or the second core network device or the UE related to any of the foregoing method embodiments.

[0354] In the embodiments described above, all or some of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or some of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded into and executed by a computer, all or some of the procedures or functions described in the embodiments of the present application are performed. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from a website, a computer, a server or a data center to another website, computer, server or data center through a wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media sets. The available media can be a magnetic medium (for example, floppy disk, hard disk, magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, solid state disk (SSD)) and the like.

[0355] The various illustrative logical blocks, modules, circuits, and algorithms described in connection with the embodiments disclosed herein can be implemented or performed by a general purpose processor, a digital signal processor (DSP), an ASIC, a field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the described functions. The general purpose processor can be a microprocessor, optionally, the general purpose processor can also be any conventional processor, controller, microcontroller, or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

[0356] The steps of methods or algorithms described in the embodiments of the present application can be directly embedded in hardware, a software unit executed by a processor, or a combination of both. The software unit can be stored in a RAM, a flash memory, a ROM, an erasable programmable read-only memory (EPROM), an EEPROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium in the art. The storage medium can be connected to the processor, so that the processor can read information from, and write information to, the storage medium. Alternatively, the storage medium can be integrated into the processor. The processor and the storage medium can be located in an ASIC. The ASIC can be located in a terminal device. Alternatively, the processor and the storage medium can also be located in different components of the terminal device.

[0357] These computer program instructions can also be loaded onto a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable data processing device to generate a computer implemented process such that the instructions executed by the computer or other programmable device provide steps for implementing the functions specified in the flowchart block or blocks and / or the block or blocks in the block diagrams.

[0358] The contents in various embodiments of the present application can be mutually referred to. If there is no special description and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be mutually referred to. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0359] It can be understood that, in the embodiments of the present application, the first access network device and / or the second access network device and / or the first core network device and / or the second core network device and / or the UE can perform part or all of the steps in the embodiments of the present application. These steps or operations are only examples, and other operations or modifications of various operations can also be performed in the embodiments of the present application. In addition, the various steps can be performed in different orders according to the embodiments of the present application, and it is possible that not all operations in the embodiments of the present application are performed.

Claims

1. A communication method characterized by comprising: The method is applied to a terminal or a chip in the terminal, and the method comprises: performing a first AIoT service, wherein the terminal accesses a first access network device; in the first AIoT service performing, sending a first message to a second access network device, the first message being used for continuing or re-establishing a radio resource control (RRC) connection; determining whether to continue performing the first AIoT service.

2. The method of claim 1, wherein, The method further comprises: if it is determined to continue performing the first AIoT service, sending data and / or signaling corresponding to the first AIoT service to the second access network device or a first core network device, the first core network device being a core network device connected by the second access network device.

3. The method according to claim 1 or 2, characterized in that, performing the first AIoT service, comprising one or more of the following: reporting data and / or signaling corresponding to the first AIoT service; or transmitting, with an AIoT device, data and / or signaling corresponding to the first AIoT service.

4. The method according to any one of claims 1 to 3, characterized in that, determining whether to continue performing the first AIoT service, comprising: determining whether to continue performing the first AIoT service according to a first area, the first area being determined according to first information, the first information being preconfigured; and / or determining whether to continue performing the first AIoT service according to a first power, the first power being a remaining power of the terminal.

5. The method according to any one of claims 1 to 3, characterized in that, The method further comprises: receiving first information, the first information being used for indicating whether to continue performing the first AIoT service.

6. The method of claim 5, wherein, Before receiving the first information, the method further comprises: sending sixth information to the second access network device, the sixth information being used for requesting whether to continue performing the first AIoT service; or sending seventh information to a first core network device, the seventh information being used for requesting whether to continue performing the first AIoT service, the first core network device being a core network device connected by the second access network device.

7. The method according to any one of claims 1 to 6, characterized in that, The method further comprises: sending information of a first area and / or a first identifier to the second access network device, the first area being related to the first AIoT service, the first area being used for the second access network device to determine whether to continue performing the first AIoT service, and the first identifier being used for indicating the first AIoT service.

8. The method according to any one of claims 1 to 7, characterized in that, The method further comprises: receiving third information, the third information being used for indicating a first radio bearer, the first radio bearer being used for transmitting data and / or signaling corresponding to the first AIoT service.

9. The method according to any one of claims 1 to 8, characterized in that, The method further comprises: receiving eighth information, the eighth information being used for indicating a first resource, the first resource being used for the terminal to transmit, with an AIoT device, data and / or signaling corresponding to the first AIoT service.

10. A communication method characterized by comprising: The method is applied to a terminal or a chip in the terminal, and the method comprises: performing a first AIoT service, wherein the terminal accesses a first access network device; in the first AIoT service performing, receiving second information, the second information being used for indicating whether a second access network device has an AIoT capability; if the second access network device does not have the capability, sending a ninth message to a third access network device, the ninth message being used for continuing or re-establishing an RRC connection, wherein the third access network device has the capability; determining whether to continue to perform the first AIoT service; or, sending a first message to the second access network device, and releasing or storing data corresponding to the first AIoT service, the ninth message being used for continuing or re-establishing an RRC connection.

11. The method of claim 10, wherein, releasing the data corresponding to the first AIoT service comprises: when a first time duration arrives, if the terminal does not switch to an access network device with an AIoT capability, releasing the data.

12. The method of claim 10, wherein, after storing the data corresponding to the first AIoT service, the method comprises: receiving fourth information, the fourth information indicating that a fourth access network device has the capability; sending a tenth message to the fourth access network device, the tenth message being used for continuing or re-establishing an RRC connection; determining whether to continue to perform the first AIoT service.

13. The method of claim 10, wherein, The method further comprises: if the second access network device has the capability, sending the data to the second access network device.

14. A communication method, comprising: The method is applied to a second access network device or a chip in the second access network device, and the method comprises: receiving sixth information, the sixth information being used for requesting whether to continue to perform a first AIoT service; sending second information, the second information being used for indicating whether to continue to perform the first AIoT service.

15. The method of claim 14, wherein, The method further comprises: receiving fourth information from a terminal or a first access network device, the fourth information being used for indicating a first area, the first area being related to the first AIoT service, and the first area being used for determining whether to continue to perform the first AIoT service.

16. The method of claim 14, wherein, The method further comprises: sending ninth information to a first access network device, the ninth information being used for requesting whether to continue to perform the first AIoT service; receiving tenth information from the first access network device, the tenth information being used for indicating whether to continue to perform the first AIoT service.

17. The method according to any one of claims 14 to 16, characterized in that, The method further comprises: sending third information, the third information being used for indicating a first radio bearer, the first radio bearer being used for transmitting data and / or signaling corresponding to an AIoT service.

18. The method according to any one of claims 14 to 17, characterized in that, The method further comprises: receiving fifth information, the fifth information being used for indicating that a terminal is authorized to be a reader-writer of the first AIoT service.

19. The method according to any one of claims 14 to 18, characterized in that, The method further comprises: if the second information indicates that the first AIoT service is continued to be performed, receiving data and / or signaling corresponding to the first AIoT service.

20. A method of communication, comprising: The method is applied to a first core network device or a chip in the first core network device, and the method comprises: receiving seventh information, the seventh information being used for requesting whether to continue to perform a first AIoT service; sending eleventh information, the eleventh information being used for indicating whether to continue to perform the first AIoT service.

21. The method of claim 20, wherein, The method further comprises: sending fifth information, the fifth information being used for indicating that a terminal is authorized to be a reader-writer of the first AIoT service.

22. The method of claim 20 or 21, wherein, The method further comprises: sending a fifth message to the first access network device, the fifth message comprising a NAS message, and comprising first indication information indicating the first AIoT service.

23. The method according to any one of claims 20 to 22, characterized in that, The method further comprises: if the eleventh information indicates to continue the first AIoT service, receiving data and / or signaling corresponding to the AIoT service.

24. A method of communication, comprising: The method is applied to a first access network device or a chip in the first access network device, and the method comprises: receiving ninth information for requesting whether to continue the first AIoT service, wherein the second access network device is an access network device currently camped by the terminal; sending tenth information for indicating whether to continue the first AIoT service.

25. The method of claim 24, wherein, The method further comprises: receiving a fifth message, the fifth message comprising a NAS message, and comprising first indication information indicating the first AIoT service; configuring AIoT radio resources for the terminal according to the first indication information.

26. A communications device, characterized by The communication apparatus comprises a module for performing the method of any one of claims 1-9, or a module for performing the method of any one of claims 10-13, or a module for performing the method of any one of claims 14-19, or a module for performing the method of any one of claims 20-23, or a module for performing the method of any one of claims 24-25.

27. A communications device, characterized by The communication apparatus comprises a processor configured to perform the method of any one of claims 1-9, or the method of any one of claims 10-13, or the method of any one of claims 14-19, or the method of any one of claims 20-23, or the method of any one of claims 24-25.

28. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer programs or instructions which, when executed, cause the method of any one of claims 1-9 to be performed, or the method of any one of claims 10-13 to be performed, or the method of any one of claims 14-19 to be performed, or the method of any one of claims 20-23 to be performed, or the method of any one of claims 24-25 to be performed.

29. A computer program product, characterised in that, The computer program product comprises computer programs or instructions which, when executed, cause the method of any one of claims 1-9 to be performed, or the method of any one of claims 10-13 to be performed, or the method of any one of claims 14-19 to be performed, or the method of any one of claims 20-23 to be performed, or the method of any one of claims 24-25 to be performed.

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