WO2023065826A1 - 一种通信方法及通信装置 - Google Patents

一种通信方法及通信装置 Download PDF

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Publication number
WO2023065826A1
WO2023065826A1 PCT/CN2022/115592 CN2022115592W WO2023065826A1 WO 2023065826 A1 WO2023065826 A1 WO 2023065826A1 CN 2022115592 W CN2022115592 W CN 2022115592W WO 2023065826 A1 WO2023065826 A1 WO 2023065826A1
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WIPO (PCT)
Prior art keywords
terminal
authorization
message
unmanned flight
request message
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PCT/CN2022/115592
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English (en)
French (fr)
Inventor
张成晨
邢玮俊
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华为技术有限公司
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Publication of WO2023065826A1 publication Critical patent/WO2023065826A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/22—Traffic simulation tools or models
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management

Definitions

  • UAM Urban air mobility
  • urban air vehicles can fly within or between cities to carry goods or people.
  • Urban air vehicles can have fixed routes and can also stop at designated stops.
  • Embodiments of the present application provide a communication method and a communication device, which are used to improve the flight safety of urban air vehicles.
  • the embodiment of the present application provides a communication method, which can be used by a session management network element, a mobility management network element, a module (such as a chip) applied to a session management network element, or applied to a mobility management network element Modules (such as chips) to execute.
  • the method includes: receiving a non-access stratum NAS message from a terminal, the terminal being an urban air vehicle; sending a response message rejecting or accepting the NAS message to the terminal according to the subscription information of the terminal, the subscription information indicating whether to allow The terminal performs unmanned flight operations.
  • the urban air vehicle if the urban air vehicle sends a NAS message, the urban air vehicle is allowed to perform unmanned flight business or not allowed to perform unmanned flight business according to the contract information of the urban air vehicle , decide to send a response message rejecting the NAS message or a response message accepting the NAS message to the urban air vehicle.
  • the method effectively controls the unmanned flight service performed by the urban air vehicle, and can prevent the urban air vehicle that cannot perform the unmanned flight service from performing the unmanned flight service, thereby improving the safety of the urban air vehicle during flight .
  • the response message for rejecting the NAS message includes a cause value, where the cause value is to prohibit the unmanned flight service.
  • This method helps to reduce the signaling overhead of the terminal by notifying the terminal of the reason for the rejection, so that the terminal no longer initiates the unmanned flight service.
  • the subscription information it is determined to reject or accept the NAS message.
  • the subscription information indicates that the terminal is not allowed to perform the unmanned flight service, it is determined to reject the NAS message.
  • the NAS message is directly rejected, and there is no need to request the authentication and authorization server to authorize the unmanned flight service of the terminal, which can reduce signaling overhead.
  • the subscription information indicates that the terminal is allowed to perform unmanned flight services
  • the unmanned flight service of the terminal if it is determined that the unmanned flight service of the terminal is allowed, it is also necessary to request the authentication and authorization server to authorize the unmanned flight service of the terminal, and only the authentication and authorization server authorizes the unmanned flight service of the terminal, then It is determined to accept the above NAS message, that is, to allow the unmanned flight service of the terminal, so as to ensure the safety of the urban air vehicle during flight.
  • the subscription information indicates whether the terminal is allowed to perform unmanned flight service if the flight type of the terminal is manned.
  • the subscription information indicates that the terminal is not allowed to perform unmanned flight services if the flight type of the terminal is manned, and the flight type of the terminal is manned, the NAS message is directly rejected. Then request the authentication and authorization server to authorize the unmanned flight service of the terminal, which can reduce signaling overhead.
  • the urban air vehicle if it sends a session management request message, it can decide to send the request message to the city according to the instruction information indicating that the urban air vehicle is allowed to perform unmanned flight business or not allowed to perform unmanned flight business.
  • the air vehicle sends a response message rejecting the session management request message or a response message accepting the session management request message.
  • the method effectively controls the unmanned flight service performed by the urban air vehicle, and can prevent the urban air vehicle that cannot perform the unmanned flight service from performing the unmanned flight service, thereby improving the safety of the urban air vehicle during flight .
  • the indication information it is determined to reject or accept the session management request message.
  • the indication information indicates that the terminal is not allowed to perform the unmanned flight service, it is determined to reject the session management request message.
  • the indication information indicates that the terminal is allowed to perform the unmanned flight service
  • the indication information indicates that the terminal is allowed to perform the unmanned flight service
  • the unmanned flight service of the terminal if it is determined that the unmanned flight service of the terminal is allowed, it is also necessary to request the authentication and authorization server to authorize the unmanned flight service of the terminal, and only the authentication and authorization server authorizes the unmanned flight service of the terminal, then It is determined to accept the above session management request message, that is, to allow the unmanned flight service of the terminal, so that the safety of the urban air vehicle during flight can be guaranteed.
  • the indication information indicates whether the terminal is allowed to perform unmanned flight service if the flight type of the terminal is manned.
  • the terminal determines to reject the session management request information.
  • the terminal is not allowed to perform unmanned flight services, and the flight type of the terminal is a manned type, directly rejecting the session management request message, There is no need to request the authentication and authorization server to authorize the unmanned flight service of the terminal, which can reduce signaling overhead.
  • the indication information indicates that if the flight type of the terminal is manned, the terminal is allowed to perform unmanned flight business, and the flight type of the terminal is manned, send an authorization request to the authentication authorization server message, the authorization request message is used to request authorization for the unmanned flight service of the terminal; receive an authorization response message from the authentication authorization server, the authorization response message indicates authorization failure; determine to reject the session according to the authorization response message Management request message.
  • the indication information indicates that if the flight type of the terminal is manned, the terminal is allowed to perform unmanned flight business, and the flight type of the terminal is manned, send an authorization request to the authentication authorization server message, the authorization request message is used to request authorization for the unmanned flight service of the terminal; receive the authorization response message from the authentication authorization server, the authorization response message indicates that the authorization is successful; according to the authorization response message, determine to accept the session Management request message.
  • the unmanned flight service of the terminal if it is determined that the unmanned flight service of the terminal is allowed, it is also necessary to request the authentication and authorization server to authorize the unmanned flight service of the terminal, and only the authentication and authorization server authorizes the unmanned flight service of the terminal, then It is determined to accept the above session management request message, that is, to allow the unmanned flight service of the terminal, so that the safety of the urban air vehicle during flight can be guaranteed.
  • the session management request message and the indication information from the mobility management network element are received.
  • the embodiment of the present application provides a communication method, which can be used by a session management network element, a mobility management network element, a module (such as a chip) applied to a session management network element, or applied to a mobility management network element Modules (such as chips) to execute.
  • a communication method which can be used by a session management network element, a mobility management network element, a module (such as a chip) applied to a session management network element, or applied to a mobility management network element Modules (such as chips) to execute.
  • the method includes: sending an authentication and authorization request message to an authentication and authorization server, where the authentication and authorization request message is used to request authentication and authorization for a terminal, the terminal being an urban air vehicle; receiving an authentication and authorization response message from the authentication and authorization server, the authentication and authorization
  • the authorization response message includes indication information, the indication information indicates whether the terminal is allowed to perform the unmanned flight service; receive the non-access stratum NAS message from the terminal; according to the indication information, send to the terminal an instruction to reject or accept the NAS message Respond to the message.
  • the urban air vehicle sends a NAS message
  • the urban air vehicle is allowed to perform unmanned flight operations or the first instruction information that the urban air vehicle is not allowed to perform unmanned flight operations , decide to send a response message rejecting the NAS message or a response message accepting the NAS message to the urban air vehicle.
  • the method effectively controls the unmanned flight service performed by the urban air vehicle, and can prevent the urban air vehicle that cannot perform the unmanned flight service from performing the unmanned flight service, thereby improving the safety of the urban air vehicle during flight .
  • the response message for rejecting the NAS message includes a cause value, where the cause value is to prohibit the unmanned flight service.
  • the indication information it is determined to reject or accept the NAS message.
  • the indication information indicates that the terminal is not allowed to perform the unmanned flight service, it is determined to reject the NAS message.
  • the indication information indicates that the terminal is allowed to perform the unmanned flight service
  • the indication information indicates that the terminal is allowed to perform the unmanned flight service
  • the unmanned flight service of the terminal if it is determined that the unmanned flight service of the terminal is allowed, it is also necessary to request the authentication and authorization server to authorize the unmanned flight service of the terminal, and only the authentication and authorization server authorizes the unmanned flight service of the terminal, then It is determined to accept the above NAS message, that is, to allow the unmanned flight service of the terminal, so as to ensure the safety of the urban air vehicle during flight.
  • the indication information indicates whether the terminal is allowed to perform unmanned flight service if the flight type of the terminal is manned.
  • the indication information indicates that if the flight type of the terminal is manned, the terminal is not allowed to perform unmanned flight service, and the flight type of the terminal is manned, it is determined to reject the NAS message.
  • the indication information indicates that if the flight type of the terminal is a manned type, the terminal is allowed to perform unmanned flight business, and the flight type of the terminal is a manned type, send an authorization to the authentication authorization server request message, the authorization request message is used to request authorization of the unmanned flight service of the terminal; receive an authorization response message from the authentication authorization server, the authorization response message indicates authorization failure; according to the authorization response message, determine to reject the NAS message.
  • the indication information indicates that if the flight type of the terminal is a manned type, the terminal is allowed to perform unmanned flight business, and the flight type of the terminal is a manned type, send an authorization to the authentication authorization server request message, the authorization request message is used to request authorization for the unmanned flight service of the terminal; receive the authorization response message from the authentication authorization server, the authorization response message indicates that the authorization is successful; according to the authorization response message, determine to accept the NAS message.
  • the unmanned flight service of the terminal if it is determined that the unmanned flight service of the terminal is allowed, it is also necessary to request the authentication and authorization server to authorize the unmanned flight service of the terminal, and only the authentication and authorization server authorizes the unmanned flight service of the terminal, then It is determined to accept the above NAS message, that is, to allow the unmanned flight service of the terminal, so as to ensure the safety of the urban air vehicle during flight.
  • the NAS message is a session management request message
  • the session management request message requests to establish a session for the unmanned flight service.
  • the embodiment of the present application provides a communication device, which can be a session management network element, a mobility management network element, a module (such as a chip) applied to a session management network element, or a mobility management network element Modules (such as chips).
  • the device has the function of realizing any realization method of the above-mentioned first aspect or any realization method of the third aspect. This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the embodiment of the present application provides a communication device, which may be a session management network element or a module (such as a chip) applied to the session management network element.
  • the device has the function of implementing any implementation method of the second aspect above. This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the embodiment of the present application provides a communication device, including a processor and a memory; the memory is used to store computer instructions, and when the device is running, the processor executes the computer instructions stored in the memory, so that the device executes Any implementation method in the first aspect to the third aspect above.
  • the embodiment of the present application provides a communication device, including a unit or means (means) for performing each step of any implementation method in the above-mentioned first aspect to the third aspect.
  • the embodiment of the present application provides a communication device, including a processor and an interface circuit, the processor is configured to communicate with other devices through the interface circuit, and execute any implementation method in the first aspect to the third aspect above.
  • the processor includes one or more.
  • the embodiment of the present application provides a communication device, including a processor coupled to the memory, and the processor is used to call the program stored in the memory to execute any implementation method in the first aspect to the third aspect above .
  • the memory may be located within the device or external to the device. And there may be one or more processors.
  • the embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores instructions, and when it is run on the communication device, the above-mentioned first to third aspects Any implementation method is executed.
  • the embodiment of the present application also provides a computer program product, the computer program product includes a computer program or instruction, when the computer program or instruction is run by the communication device, any of the above first to third aspects The implementation method is executed.
  • the embodiment of the present application further provides a chip system, including: a processor, configured to execute any implementation method in the first aspect to the third aspect above.
  • Figure 1(a) is a schematic diagram of a 5G network architecture based on a service architecture
  • Figure 1(b) is a schematic diagram of a 5G network architecture based on a point-to-point interface
  • FIG. 2(a) is a schematic flow diagram of a communication method provided by the embodiment of the present application.
  • FIG. 2(b) is a schematic flow diagram of a communication method provided by an embodiment of the present application.
  • FIG. 2(c) is a schematic flow diagram of a communication method provided by an embodiment of the present application.
  • FIG. 2(d) is a schematic flow diagram of a communication method provided by an embodiment of the present application.
  • FIG. 2(e) is a schematic flow diagram of a communication method provided by an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a communication method provided in an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a communication device provided in an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a communication device provided by an embodiment of the present application.
  • Figure 1(a) is a schematic diagram of a 5G network architecture based on a service-based architecture.
  • the fifth generation (the 5th generation, 5G) network architecture shown in Figure 1(a) may include a data network (data network, DN) and one or more of the following network elements: unified data management (unified data management, UDM) network element, unified data repository (unified data repository, UDR), network exposure function (network exposure function, NEF) network element (not shown in the figure), application function (application function, AF) network element, policy control function ( Policy control function (PCF) network element, access and mobility management function (access and mobility management function, AMF) network element, session management function (session management function, SMF) network element, user plane function (user plane function, UPF) ) network elements, wireless access network (radio access network, RAN) equipment, unmanned aerial system (uncrewed aerial system, UAS) service provider (UAS service supplier, USS) server (not shown in the figure, hereinafter referred to as USS ).
  • the wireless access network equipment can be a base station (base station), an evolved base station (evolved NodeB, eNodeB), a transmission reception point (transmission reception point, TRP), and a next generation base station (next generation NodeB, gNB) in a 5G mobile communication system , a next-generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a wireless fidelity (Wireless Fidelity, WiFi) system, etc.; it can also be a module or unit that completes some functions of the base station, for example, It can be a centralized unit (central unit, CU) or a distributed unit (distributed unit, DU).
  • the radio access network equipment may be a macro base station, a micro base station or an indoor station, or a relay node or a donor node.
  • the embodiment of the present application does not limit the specific technology and specific equipment form adopted by the radio access network equipment.
  • a base station is used as an example of a radio access network device for description.
  • the terminal communicating with the RAN may also be called terminal equipment, user equipment (user equipment, UE), mobile station, mobile terminal, and so on.
  • Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things ( internet of things, IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart city, etc.
  • Terminals can be mobile phones, tablet computers, computers with wireless transceiver functions, wearable devices, vehicles, urban air vehicles (such as drones, helicopters, etc.), ships, robots, robotic arms, smart home devices, etc.
  • the embodiment of the present application is described by taking the terminal as an urban air vehicle as an example.
  • the urban air vehicle is a terminal for accessing the network, for example, it may be an urban air traffic UAM loaded with a universal subscriber identity module (USIM) card.
  • USIM universal subscriber identity module
  • Base stations and terminals can be fixed or mobile. Base stations and terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and artificial satellites in the air. The embodiments of the present application do not limit the application scenarios of the base station and the terminal.
  • the AMF network element includes functions such as mobility management and access authentication/authorization. In addition, it is also responsible for transferring user policies between the terminal and the PCF.
  • the SMF network element includes functions such as session management execution, execution of PCF issued control policies, UPF selection, terminal Internet Protocol (internet protocol, IP) address assignment, etc.
  • the UPF network element as the interface with the data network, includes functions such as user plane data forwarding, session/flow-based accounting statistics, and bandwidth limitation.
  • UDM network element including the execution management of subscription data, user access authorization and other functions.
  • UDR including the access function of execution contract data, policy data, application data and other types of data.
  • NEF network elements are used to support the opening of capabilities and events.
  • the AF network element transmits the requirements from the application side to the network side, such as QoS requirements or user status event subscription.
  • the AF can be a third-party functional entity, or an application server deployed by an operator.
  • the PCF network element includes policy control functions such as charging for sessions and service flow levels, QoS bandwidth guarantee, mobility management, and terminal policy decision-making.
  • USS is used to provide services for the safe and effective use of airspace by urban air vehicles, and is responsible for the certification and authorization of urban air vehicles, the authorization of flight plans, the authorization of command and control (C2) communications, and the authorization of unmanned flight operations.
  • C2 communication is the communication between the controller and the urban air vehicle, and the C2 communication is used for the controller to send a control message or a command message to the urban air vehicle.
  • DN is a network outside the operator's network.
  • the operator's network can access multiple DNs, and various services can be deployed on the DN, which can provide data and/or voice services for terminals.
  • DN is a private network of a smart factory.
  • the sensors installed in the workshop of the smart factory can be terminals, and the control server of the sensors is deployed in the DN, and the control server can provide services for the sensors.
  • the sensor can communicate with the control server, obtain instructions from the control server, and transmit the collected sensor data to the control server according to the instructions.
  • DN is a company's internal office network.
  • the mobile phone or computer of the company's employees can be a terminal, and the employee's mobile phone or computer can access information and data resources on the company's internal office network.
  • Npcf, Nudr, Nudm, Naf, Namf, and Nsmf are the service interfaces provided by the above-mentioned PCF, UDR, UDM, AF, AMF, and SMF, respectively, and are used to call corresponding service operations.
  • N1, N2, N3, N4, and N6 are interface serial numbers, and the meanings of these interface serial numbers may refer to the description in FIG. 1(b).
  • Figure 1(b) is a schematic diagram of a 5G network architecture based on a point-to-point interface.
  • the introduction of the functions of the network elements can refer to the introduction of the functions of the corresponding network elements in Figure 1(a), and will not be repeated here.
  • the main difference between Figure 1(b) and Figure 1(a) is that the interface between each control plane network element in Figure 1(a) is a service interface, and each control plane network element in Figure 1(b) The interface between them is a point-to-point interface.
  • N1 the interface between the AMF and the terminal, which can be used to transmit QoS control rules and the like to the terminal.
  • N2 the interface between the AMF and the RAN, which can be used to transfer radio bearer control information from the core network side to the RAN.
  • N3 the interface between the RAN and the UPF, mainly used to transfer the uplink and downlink user plane data between the RAN and the UPF.
  • N4 The interface between SMF and UPF, which can be used to transfer information between the control plane and the user plane, including controlling the distribution of forwarding rules, QoS control rules, traffic statistics rules, etc. Information reporting.
  • N5 the interface between the AF and the PCF, which can be used for sending application service requests and reporting network events.
  • N6 the interface between UPF and DN, used to transfer the uplink and downlink user data flow between UPF and DN.
  • N7 the interface between PCF and SMF, which can be used to deliver protocol data unit (protocol data unit, PDU) session granularity and service data flow granularity control policy.
  • protocol data unit protocol data unit
  • PDU protocol data unit
  • N8 The interface between AMF and UDM, which can be used for AMF to obtain subscription data and authentication data related to access and mobility management from UDM, and for AMF to register terminal current mobility management related information with UDM.
  • N9 a user plane interface between UPF and UPF, used to transmit uplink and downlink user data flows between UPFs.
  • N10 the interface between SMF and UDM, which can be used for SMF to obtain session management-related subscription data from UDM, and for SMF to register terminal current session-related information with UDM.
  • the subscription information includes indication information indicating whether the terminal is allowed to perform the unmanned flight service.
  • the SMF may also request the subscription information of the terminal from the UDM, and then receive the subscription information from the UDM. That is, the SMF obtains the subscription information of the terminal from the UDM.
  • the unmanned flight service of the terminal may also be controlled in combination with the flight type of the terminal, and the flight type may be manned or unmanned.
  • the subscription information of the terminal in the above step 202a indicates whether the terminal is allowed to perform unmanned flight service if the flight type of the terminal is manned.
  • the SMF determines that the terminal's flight type is manned, the SMF determines to reject the above NAS message.
  • the SMF can directly reject the NAS message, and does not need to request the USS to authorize the unmanned flight service of the terminal, which can reduce signaling overhead.
  • the SMF can further send an authorization request to the USS message, the authorization request message is used to request the authorization of the unmanned flight service of the terminal, and then the SMF receives the authorization response message from the USS. If the authorization response message indicates that the authorization fails, the SMF determines to reject the above-mentioned authorization response message according to the authorization response message. NAS message, if the authorization response message indicates that the authorization is successful, the SMF determines to accept the above NAS message according to the authorization response message.
  • the SMF if the SMF allows the unmanned flight service of the terminal, the SMF also needs to request the USS to authorize the unmanned flight service of the terminal. Only when the USS authorizes the unmanned flight service of the terminal, the SMF will accept The above-mentioned NAS message allows the unmanned flight service of the terminal, so as to ensure the safety of urban air vehicles during flight.
  • the SMF can further send an authorization request message to the USS.
  • the authorization request message is used to request authorization for the unmanned flight service of the terminal, and then the SMF receives the authorization request from the USS. If the authorization response message indicates that the authorization fails, the SMF determines to reject the above NAS message according to the authorization response message, and if the authorization response message indicates that the authorization is successful, then the SMF determines to accept the above NAS message according to the authorization response message .
  • the SMF if the SMF allows the unmanned flight service of the terminal, the SMF also needs to request the USS to authorize the unmanned flight service of the terminal.
  • the SMF Only when the USS authorizes the unmanned flight service of the terminal, the SMF will accept The above-mentioned NAS message allows the unmanned flight service of the terminal, so as to ensure the safety of urban air vehicles during flight.
  • the flight type of the terminal is an unmanned type, there is no need to refer to the subscription information of the terminal.
  • an embodiment of the present application provides a communication method, referring to FIG. 2(b), the method includes the following steps:
  • step 201b the terminal sends a NAS message to the AMF, and the AMF receives the NAS message accordingly.
  • the terminal is an urban air vehicle.
  • step 202b the AMF sends a response message of rejecting or accepting the NAS message to the terminal according to the subscription information of the terminal.
  • the terminal receives a response message of rejecting or accepting the NAS message.
  • the AMF may trigger the execution of step 202b according to the indication information.
  • the subscription information indicates whether the terminal is allowed to perform the unmanned flight service.
  • the subscription information includes indication information indicating whether the terminal is allowed to perform the unmanned flight service.
  • the AMF allows the urban air vehicle to perform unmanned flight operations or does not allow the urban air vehicle to perform unmanned flight according to the contract information of the urban air vehicle.
  • the service decides to send a response message rejecting the NAS message or a response message accepting the NAS message to the urban air vehicle.
  • the method effectively controls the unmanned flight service performed by the urban air vehicle, and can prevent the urban air vehicle that cannot perform the unmanned flight service from performing the unmanned flight service, thereby improving the safety of the urban air vehicle during flight .
  • the AMF may request the subscription information of the terminal from the UDM, and then receive the subscription information from the UDM. That is, the AMF acquires the subscription information of the terminal from the UDM.
  • the response message of the rejecting NAS message may carry a reason value, and the reason value is that the unmanned flight service is prohibited.
  • the terminal no longer initiates the unmanned flight service, which helps to reduce the signaling overhead of the terminal.
  • the AMF may also judge whether to reject the above-mentioned NAS message or accept the above-mentioned NAS message according to the subscription information.
  • the method for the AMF to judge whether to reject the NAS message or to accept the above NAS message is similar to the method for the SMF to judge whether to reject the NAS message or to accept the above NAS message in the embodiment corresponding to FIG.
  • the unmanned flight service of the terminal may also be controlled in combination with the flight type of the terminal, and the flight type may be manned or unmanned.
  • the subscription information of the terminal in step 202b above indicates whether the terminal is allowed to perform unmanned flight service if the flight type of the terminal is manned.
  • the method for the AMF to judge whether to reject the NAS message or to accept the above NAS message is similar to the method for the SMF to judge whether to reject the NAS message or to accept the above NAS message in the embodiment corresponding to FIG.
  • an embodiment of the present application provides a communication method. Referring to FIG. 2(c), the method includes the following steps:
  • step 200c the terminal sends an uplink NAS message to the AMF, the uplink NAS message includes a session management request message, and correspondingly, the AMF receives the uplink NAS message.
  • the terminal is an urban air vehicle.
  • step 201c the AMF sends a session management request message and indication information to the SMF, and the SMF receives the session management request message and indication information accordingly.
  • the AMF receives the session management request message, but the AMF cannot parse the session management request message, so the AMF does not know that the session management request message requests to establish a session for the unmanned flight service.
  • the AMF can know whether the terminal is allowed to perform the unmanned flight service. For example, the AMF can obtain the contract information of the terminal, and learn whether the terminal is allowed to perform the unmanned flight service according to the contract information of the terminal. Since the AMF does not know that the session management request message requests to establish a session for the unmanned flight service, the AMF cannot judge whether to reject the session management request message or accept the session management request message.
  • the AMF can send the session management request to the SMF, and at the same time send an indication message to the SMF, which indicates whether the terminal is allowed to perform the unmanned flight service. Since the SMF can parse the session management request message, the SMF can know the session The management request message requests to establish a session for the unmanned flight service, so that the SMF can judge whether to reject the session management request message or accept the session management request message according to the indication information.
  • step 202c the SMF sends a response message of rejecting or accepting the session management request message to the terminal according to the indication information.
  • the terminal receives a response message rejecting or accepting the session management request message.
  • the response message of the rejecting session management request message may carry a reason value, and the reason value is that the unmanned flight service is prohibited .
  • the terminal no longer initiates the unmanned flight service, which helps to reduce the signaling overhead of the terminal.
  • the unmanned flight service of the terminal may also be controlled in combination with the flight type of the terminal, and the flight type may be manned or unmanned.
  • the instruction information in the above step 202c indicates whether the terminal is allowed to perform unmanned flight service if the flight type of the terminal is manned.
  • the method for the SMF to judge whether to reject the above-mentioned session management request message or to accept the above-mentioned session management request message is similar to the method for the SMF to judge whether to reject the above-mentioned NAS message or to accept the above-mentioned NAS message in the embodiment corresponding to FIG. .
  • an embodiment of the present application provides a communication method, referring to FIG. 2(d), the method includes the following steps:
  • the authentication and authorization request message is used to request authentication and authorization for the terminal, where the terminal is an urban air vehicle.
  • the authentication authorization response message includes first indication information, where the first indication information indicates whether the terminal is allowed to perform the unmanned flight service.
  • step 203d the terminal sends a NAS message to the AMF, and the AMF receives the NAS message accordingly.
  • the AMF may trigger the execution of step 204d according to the second indication information.
  • the AMF if the urban air vehicle sends a NAS message, the AMF, according to the instruction from the USS, allows the urban air vehicle to perform unmanned flight operations or the first instruction information that does not allow the urban air vehicle to perform unmanned flight operations, A decision is made to send a response message rejecting the NAS message or a response message accepting the NAS message to the urban air vehicle.
  • the method effectively controls the unmanned flight service performed by the urban air vehicle, and can prevent the urban air vehicle that cannot perform the unmanned flight service from performing the unmanned flight service, thereby improving the safety of the urban air vehicle during flight .
  • the response message of the rejecting NAS message may carry a reason value, and the reason value is that the unmanned flight service is prohibited.
  • the terminal no longer initiates the unmanned flight service, which helps to reduce the signaling overhead of the terminal.
  • the AMF may also judge whether to reject the NAS message or accept the NAS message according to the first indication information.
  • the method for the AMF to judge whether to reject the NAS message or to accept the above NAS message is similar to the method for the SMF to judge whether to reject the NAS message or to accept the above NAS message in the embodiment corresponding to FIG.
  • step 201e the SMF sends an authentication and authorization request message to the USS.
  • the USS receives the authentication authorization request message.
  • step 202e the USS sends an authentication and authorization response message to the SMF.
  • the AMF receives the authentication authorization response message.
  • the authentication authorization response message includes first indication information, where the first indication information indicates whether the terminal is allowed to perform the unmanned flight service.
  • step 203e the terminal sends a NAS message to the SMF, and the SMF receives the NAS message accordingly.
  • the terminal sends the NAS message to the AMF, and then the AMF sends the NAS message to the SMF.
  • the terminal is an urban air vehicle.
  • the SMF may also judge whether to reject the NAS message or accept the NAS message according to the first indication information.
  • the method for the SMF to judge whether to reject the NAS message or to accept the above-mentioned NAS message is similar to the method for the SMF to judge whether to reject the above-mentioned NAS message or to accept the above-mentioned NAS message in the embodiment corresponding to FIG.
  • the unmanned flight service of the terminal may also be controlled in combination with the flight type of the terminal, and the flight type may be manned or unmanned.
  • the first indication information in the above step 204e indicates whether the terminal is allowed to perform unmanned flight service if the flight type of the terminal is manned.
  • the method for the SMF to judge whether to reject the NAS message or to accept the above NAS message is similar to the method for the SMF to judge whether to reject the NAS message or to accept the above NAS message in the embodiment corresponding to FIG.
  • FIG. 3 it is a communication method provided by an embodiment of the present application.
  • the method includes the following steps:
  • the terminal is an urban air vehicle.
  • the USS authenticates and authorizes the terminal. If the terminal is legal, it can further authorize the service of the terminal. If the terminal is illegal, no service authorization will be performed on the terminal. In the embodiment of this application, the USS authentication result of the terminal is valid.
  • the terminal here may be an urban air vehicle connected to the 3GPP network.
  • step 301 is an optional step, and step 301 may not be executed if the terminal is authenticated and authorized during the session establishment process.
  • Step 302 the terminal sends a PDU session management request (PDU session management request) message to the SMF.
  • the SMF receives the PDU session management request message.
  • the PDU session management request message requests to establish a session for the unmanned flight service.
  • the name of the PDU session management request message may be used to request the establishment of a session for the unmanned flight service, or
  • the PDU session management request message includes indication information for requesting to establish a session for the unmanned flight service.
  • step 303 the SMF sends a subscription data request (subscription data request) message to the UDM, and the UDM receives the subscription data request message accordingly.
  • the subscription data request message is used to request session management subscription data of the terminal.
  • the subscription data response message includes session management subscription data, and the session management subscription data includes indication information.
  • the indication information indicates whether the terminal is allowed to perform the unmanned flight service. That is, the instruction information indicates that the terminal is allowed to perform the unmanned flight service, or indicates that the terminal is not allowed to perform the unmanned flight service.
  • the indication information indicates whether the terminal is allowed to perform the unmanned flight service if the flight type of the terminal is a manned type. That is, the indication information indicates that if the flight type of the terminal is manned, the terminal is allowed to perform unmanned flight services, or indicates that if the flight type of the terminal is manned, the terminal is not allowed to perform unmanned flight services.
  • the SMF may acquire the session management subscription data locally.
  • the following steps 305 to 307 are performed. If the indication information in the session management subscription data indicates that the terminal is not allowed to perform the unmanned flight service, perform the following step 308 .
  • the method for the SMF to determine the flight type of the terminal may be, for example: the SMF receives indication information from the AMF, USS or the terminal, the indication information indicates the flight type of the terminal, or the SMF obtains from the session management subscription data in the above step 304 The flight type of the terminal.
  • the method for determining the flight type of the terminal by the SMF described here is also applicable to other embodiments, and details will not be described hereafter.
  • step 305 the SMF sends an authorization request (authorization request) message to the USS.
  • the USS receives the authorization request message.
  • the authorization request message is used to request authorization of the unmanned flight service of the terminal.
  • step 301 the authorization request message is used to request authentication and authorization of the terminal, and to request authorization of the unmanned flight service of the terminal.
  • step 306 the USS sends an authorization response (authorization response) message to the SMF.
  • the SMF receives the authorization response message.
  • the above authorization request message is used to request authentication and authorization of the terminal, and to request authorization of the unmanned flight service of the terminal. If the manned flight service is authorized, the authorization response message indicates the authorization of the terminal's unmanned flight service. If the USS fails to authorize the terminal authentication or determines not to authorize the terminal's unmanned flight service, the authorization response message indicates the terminal authentication. The authorization fails or the unmanned flight service of the terminal is not authorized. In this scenario, if the authorization response message indicates that the terminal authentication and authorization fail, it also implicitly indicates that the terminal is not authorized for the unmanned flight service.
  • the PDU session management response message in the above step 302 is a PDU session establishment request message, then the PDU session management response message is a PDU session establishment response message. If the PDU session management request message in the above step 302 is a PDU session modification request message, then the PDU session management response message is a PDU session modification response message.
  • the PDU session management response message is used to reject the PDU session management request message of the terminal.
  • the PDU session management response message may include a cause value, where the cause value is to prohibit the unmanned flight service.
  • the PDU session management response message may be a PDU session establishment rejection message or a PDU session modification rejection message.
  • the PDU session management response message is used to accept the PDU session management request message of the terminal.
  • the PDU session management response message may be a PDU session establishment accept message or a PDU session modification accept message.
  • the session management subscription data in the above step 304 further includes another indication information, which indicates whether the terminal has aviation capability. If the indication information indicates that the terminal has no aeronautical capability, the subsequent SMF will refuse the terminal to perform the unmanned flight service. If the indication information indicates that the terminal has aviation capability, the subsequent SMF judges to reject or accept the terminal to perform the unmanned flight service according to the method described above.
  • the SMF may also know whether the terminal has the aviation capability through other methods, for example, the AMF sends indication information to the SMF, and the indication information indicates whether the terminal has the aviation capability.
  • the SMF receives the PDU session management request message in step 302 above, it considers that the terminal has aviation capabilities, because the terminal actually sends the PDU session management request message to the AMF first, and then the AMF forwards the PDU session management request message to the SMF , since the AMF does not reject the PDU session management request message, it indicates that the terminal has aviation capability.
  • the SMF judges to reject or accept the terminal to perform the unmanned flight service according to the method described above.
  • the cause value carried in the PDU session management response message in the above step 308 may be that the unmanned flight service is prohibited, Alternatively, C2 communication may be prohibited.
  • step 402 the AMF sends a subscription data request message to the UDM.
  • the UDM receives the subscription data request message.
  • step 403 the UDM sends a subscription data response message to the AMF, and the AMF receives the subscription data response message accordingly.
  • the AMF may refuse The terminal's registration request message, that is, the registration response message is a registration rejection message, and the registration rejection message carries a reason value, and the reason value is that access of a manned type is prohibited. If the AMF rejects the terminal's registration request message, the procedure ends.
  • step 406 the USS sends an authentication authorization response message to the AMF.
  • the AMF receives the authentication authorization response message.
  • the authentication authorization response message indicates that the terminal authentication authorization succeeds or the authentication authorization fails.
  • step 405 and step 406 are optional steps.
  • Step 407 the terminal sends an uplink NAS transmission message to the AMF, and the uplink NAS transmission message includes a PDU session management request message.
  • the AMF receives the uplink NAS transmission message.
  • the uplink NAS transmission message further includes indication information, where the indication information indicates that the PDU session management request message requests to establish a session for the unmanned flight service.
  • step 407 the indication information in the mobile management subscription data indicates that if the flight type of the terminal is a manned type, the terminal is not allowed to perform unmanned flight services, and the AMF determines that the flight type of the terminal is a manned type, then after step 407 The following step 408 is executed, and the flow ends after step 408 .
  • the indication information triggers the AMF to judge whether to reject or accept the PDU session management request message. Specifically, if the indication information in the mobile management subscription data indicates that the terminal is allowed to perform unmanned flight services, or indicates that if the flight type of the terminal is a manned type, the terminal is allowed to perform unmanned flight services and the AMF determines that the terminal’s flight If the flight type of the terminal is manned, or the AMF determines that the flight type of the terminal is unmanned, the following steps 409 to 412 are executed after step 407, and the process ends after step 412.
  • the AMF cannot parse the PDU session management request message , so the AMF cannot know that the PDU session management request message requests to establish a session for the unmanned flight service, then after step 407, the following steps 413 to 416 are executed, and the process ends after step 416.
  • step 408 the AMF sends a downlink NAS transmission message to the terminal.
  • the terminal receives the downlink NAS transmission message.
  • step 409 the AMF sends a PDU session management request message to the SMF.
  • the SMF receives the PDU session management request message.
  • the PDU session management request message is the PDU session management request message in the uplink NAS transmission message in step 407 above.
  • the AMF sends a PDU session context management request message to the SMF, and the PDU session context management request message includes the PDU session management request message.
  • step 410a the SMF sends an authorization request message to the USS.
  • the USS receives the authorization request message.
  • step 410b the USS sends an authorization response message to the SMF.
  • the SMF receives the authorization response message.
  • step 410a and step 410b are the same as the aforementioned step 305 and step 306, and reference may be made to the aforementioned description.
  • step 411 the SMF sends a PDU session management response message to the AMF.
  • the AMF receives the PDU session management response message.
  • the SMF sends a PDU session context management response message to the AMF, and the PDU session context management response message includes the PDU session management response message.
  • the SMF sends a PDU session management response message to the terminal through the AMF.
  • the PDU session management response message is a PDU session management acceptance message, that is, the PDU session management acceptance message is sent to the terminal.
  • the SMF accepts the PDU Session Management Request message.
  • the PDU session management response message is a PDU session management rejection message, that is, the SMF sends a PDU session management rejection message to the terminal, and the PDU session management rejection message
  • the message contains a reason value, which is prohibiting unmanned flight operations. In this case, the SMF rejects the PDU Session Management Request message.
  • step 412 the AMF sends a downlink NAS transmission message to the terminal.
  • the terminal receives the downlink NAS transmission message.
  • the downlink NAS transmission message includes a PDU session management response message.
  • the PDU session management response message is a PDU session management reject message or a PDU session management accept message.
  • step 413 the AMF sends a PDU session management request message and indication information to the SMF.
  • the SMF receives the PDU session management request message and indication information.
  • the AMF sends a PDU session context management request message to the SMF, and the PDU session context management request message includes the PDU session management request message and indication information.
  • the function of the indication information is the same as that of the indication information in the mobile management subscription data in step 403 above.
  • the PDU session management request message is the PDU session management request message in the uplink NAS transmission message in step 407 above.
  • the SMF After receiving the PDU session management request message and the indication information, the SMF needs to judge whether to reject or accept the PDU session management request message according to the indication information. Specifically, if the instruction information indicates that the terminal is not allowed to perform unmanned flight services, or indicates that the terminal is not allowed to perform unmanned flight services if the flight type of the terminal is manned and the SMF determines that the flight type of the terminal is manned person type, the SMF determines to reject the PDU session management request message, and in this case, the following steps 414a and 414b do not need to be performed.
  • the SMF needs to request the USS to authorize the unmanned flight service of the terminal, that is, perform the following steps 414a and 414b. If the USS authorization is successful, the SMF determines to accept the PDU session management request message , if the USS authorization fails, the SMF determines to reject the PDU Session Management Request message.
  • step 414a the SMF sends an authorization request message to the USS.
  • the USS receives the authorization request message.
  • step 414b the USS sends an authorization response message to the SMF.
  • the SMF receives the authorization response message.
  • step 414a and step 414b are the same as the aforementioned step 305 and step 306, and reference may be made to the aforementioned description.
  • step 415 the SMF sends a PDU session management response message to the AMF.
  • the AMF receives the PDU session management response message.
  • the SMF sends a PDU session context management response message to the AMF, and the PDU session context management response message includes the PDU session management response message.
  • the PDU session management response message may be the PDU session management accept message.
  • the PDU session management response message may include a cause value, where the cause value is to prohibit the unmanned flight service.
  • the PDU session management response message may be a PDU session management rejection message.
  • step 416 the AMF sends a downlink NAS transmission message to the terminal.
  • the terminal receives the downlink NAS transmission message.
  • the downlink NAS transmission message includes a PDU session management response message.
  • the AMF judges whether to accept or reject the unmanned flight service requested by the terminal during the terminal registration process, or the SMF judges whether to accept or reject the unmanned flight service requested by the terminal during the session establishment/modification process, which can avoid failure Urban air vehicles that perform unmanned flight operations perform unmanned flight operations, thereby improving the safety of urban air vehicles during flight.
  • the indication information in the above step 403 may also indicate whether the terminal has aviation capabilities in addition to the functions described above. If the indication information indicates that the terminal has no aeronautical capability, the subsequent AMF or SMF will deny the terminal to perform the unmanned flight service. If the indication information indicates that the terminal has aviation capability, the subsequent AMF or SMF judges to reject or accept the terminal to perform the unmanned flight service according to the method described above.
  • the mobile management subscription data in step 403 above further includes another indication information, which indicates whether the terminal has aviation capability. If the indication information indicates that the terminal has no aeronautical capability, the subsequent AMF or SMF will deny the terminal to perform the unmanned flight service. If the indication information indicates that the terminal has aviation capability, the subsequent AMF or SMF judges to reject or accept the terminal to perform the unmanned flight service according to the method described above.
  • the PDU session management request message in step 407 is not a request to establish a session for the unmanned flight service, but a request to establish a session for the first service.
  • the AMF or SMF also needs to judge whether the first service is an unmanned flight service. If the first service is an unmanned flight service, the AMF or SMF judges to reject or accept the execution of the terminal according to the method described above. Unmanned flight business. If the first service is not an unmanned flight service, the AMF or SMF may perform subsequent procedures according to methods in the prior art, such as performing a procedure of establishing or modifying a PDU session.
  • the PDU session management request message in step 407 is used to request the establishment of a session for the unmanned flight service.
  • the PDU session management request message includes indication information, and the indication information is used to request establishment of a session.
  • C2 communication refers to the communication between the terminal and the controller, and the service corresponding to the C2 communication in the embodiment of this application is an unmanned flight service.
  • the AMF or SMF determines that the service corresponding to the C2 communication is an unmanned flight service, and then determines that the PDU session management request message is used to request establishment of a session for the unmanned flight service.
  • the AMF or SMF judges to reject or accept the terminal to perform the unmanned flight service according to the method described above.
  • the service corresponding to C2 communication may or may not be the unmanned flight service.
  • the services corresponding to C2 communication discussed in the embodiments of this application are all unmanned flight services. business.
  • the cause value described in the above-mentioned embodiment corresponding to FIG. 4 may be that the unmanned flight service is prohibited , or it can also prohibit C2 communication.
  • FIG. 5 it is a communication method provided by the embodiment of this application.
  • the method includes the following steps:
  • step 501 the terminal executes a registration process.
  • step 502 the AMF sends an authentication and authorization request message to the USS.
  • the USS receives the authentication authorization request message.
  • the authentication and authorization request message is used to request authentication and authorization for the terminal, that is, to determine whether the terminal is legal.
  • step 503 the USS sends an authentication authorization response message to the AMF.
  • the AMF receives the authentication authorization response message.
  • the authentication authorization response message indicates that the terminal authentication authorization succeeds or the authentication authorization fails.
  • the authentication and authorization response message also includes indication information.
  • the indication information indicates whether the terminal is allowed to perform the unmanned flight service. That is, the instruction information indicates that the terminal is allowed to perform the unmanned flight service, or indicates that the terminal is not allowed to perform the unmanned flight service.
  • the indication information indicates whether the terminal is allowed to perform the unmanned flight service if the flight type of the terminal is a manned type. That is, the indication information indicates that if the flight type of the terminal is manned, the terminal is allowed to perform unmanned flight services, or indicates that if the flight type of the terminal is manned, the terminal is not allowed to perform unmanned flight services.
  • the authentication authorization response message also includes the flight type of the terminal, and the flight type of the terminal is manned or unmanned.
  • Step 504 to step 513 are the same as steps 407 to 416 described above.
  • the AMF judges whether to accept or reject the unmanned flight service requested by the terminal during the terminal registration process, or the SMF judges whether to accept or reject the unmanned flight service requested by the terminal during the session establishment/modification process, which can avoid failure Urban air vehicles that perform unmanned flight operations perform unmanned flight operations, thereby improving the safety of urban air vehicles during flight.
  • the main difference between the embodiment in FIG. 5 and the embodiment in FIG. 4 above is that the embodiment in FIG. 4 above obtains the indication information from the UDM for the AMF to judge whether to allow the communication of the unmanned flight service of the terminal.
  • FIG. 5 An embodiment is to obtain the indication information from the USS.
  • FIG. 6 it is a communication method provided in the embodiment of this application.
  • the method includes the following steps:
  • Step 601 the terminal sends a PDU session establishment request message to the SMF.
  • the SMF receives the PDU session establishment request message.
  • the PDU session establishment request message is used to request establishment of a session of a non-unmanned flight service, or the PDU session establishment request message is used to request establishment of a session of an unmanned flight service.
  • step 602 the SMF sends an authentication and authorization request message to the USS.
  • the USS receives the authentication authorization request message.
  • the authentication and authorization request message is used to request authentication and authorization for the terminal, that is, to determine whether the terminal is legal.
  • step 603 the USS sends an authentication and authorization response message to the SMF.
  • the SMF receives the authentication authorization response message.
  • the authentication authorization response message indicates that the terminal authentication authorization succeeds or the authentication authorization fails.
  • the authentication and authorization response message also includes indication information.
  • the indication information indicates whether the terminal is allowed to perform the unmanned flight service. That is, the instruction information indicates that the terminal is allowed to perform the unmanned flight service, or indicates that the terminal is not allowed to perform the unmanned flight service.
  • the indication information indicates whether the terminal is allowed to perform the unmanned flight service if the flight type of the terminal is a manned type. That is, the indication information indicates that if the flight type of the terminal is manned, the terminal is allowed to perform unmanned flight services, or indicates that if the flight type of the terminal is manned, the terminal is not allowed to perform unmanned flight services.
  • the authentication authorization response message also includes the flight type of the terminal, and the flight type of the terminal is manned or unmanned.
  • step 604 the SMF sends a PDU session establishment response message to the terminal, and correspondingly, the terminal receives the PDU session establishment response message.
  • the PDU session establishment request message in the above step 601 requests to establish a session of the unmanned flight service, the following steps 605 to 607 do not need to be performed.
  • the SMF accepts the PDU session establishment request message
  • the PDU session establishment response message indicates that the session is established successfully or indicates acceptance of the PDU session establishment request message.
  • the SMF rejects the PDU session establishment request message the PDU session establishment response message may contain a cause value, the cause value is that the unmanned flight service is prohibited, and the PDU session establishment response message indicates that the session establishment fails or indicates that the PDU session establishment is rejected request message.
  • the SMF may judge whether to reject or accept the PDU session establishment request message, reference may be made to the description of the embodiment in FIG. 5 above.
  • step 601 If the PDU session establishment request message in the above step 601 is used to request establishment of a non-unmanned flight service session, then the PDU session establishment response message indicates that the session is established successfully, and the following steps 605 to 607 are executed after step 604 .
  • Step 605 the terminal sends a PDU session management request message to the SMF.
  • the SMF receives the PDU session management request message.
  • the SMF After receiving the PDU session management request message and the indication information in step 603, the SMF needs to judge whether to reject or accept the PDU session management request message according to the indication information. Specifically, if the instruction information indicates that the terminal is not allowed to perform unmanned flight services, or indicates that the terminal is not allowed to perform unmanned flight services if the flight type of the terminal is manned and the SMF determines that the flight type of the terminal is manned person type, the SMF determines to reject the PDU session management request message, and in this case, steps 606a and 606b do not need to be performed.
  • the indication information indicates that the terminal is allowed to perform unmanned flight services, or indicates that the terminal is allowed to perform unmanned flight services if the flight type of the terminal is a manned type and the SMF determines that the flight type of the terminal is a manned type, or the SMF If the flight type of the terminal is determined to be unmanned, the SMF needs to request the USS to authorize the unmanned flight service of the terminal. If the USS authorization is successful, the SMF determines to accept the PDU session management request message. If the USS authorization fails, the SMF determines Rejects the PDU Session Management Request message.
  • step 606a the SMF sends an authorization request message to the USS.
  • the USS receives the authorization request message.
  • step 606b the USS sends an authorization response message to the SMF.
  • the SMF receives the authorization response message.
  • step 606a and step 606b are the same as the aforementioned step 305 and step 306, and reference may be made to the aforementioned description.
  • step 607 the SMF sends a PDU session management response message to the terminal, and the terminal receives the PDU session management response message accordingly.
  • the PDU session management response message may be the PDU session management accept message.
  • the PDU session management response message may include a cause value, where the cause value is to prohibit the unmanned flight service.
  • the PDU session management response message may be a PDU session management rejection message.
  • the SMF judges whether to accept or reject the unmanned flight service requested by the terminal during the session establishment/modification process, which can prevent urban air vehicles that cannot perform unmanned flight services from performing unmanned flight services, thereby improving Safety while flying in urban air vehicles.
  • the main difference between the embodiment in FIG. 6 and the embodiment in FIG. 3 above is that the embodiment in FIG. 3 obtains the instruction information from the UDM for the SMF to judge whether to allow the unmanned flight service of the terminal.
  • the implementation in FIG. 6 An example is to obtain the instruction information used by the SMF to determine whether to allow the unmanned flight service of the terminal from the USS.
  • the indication information in the above step 603 may also indicate whether the terminal has aviation capability in addition to the functions described above. If the indication information indicates that the terminal has no aeronautical capability, the subsequent SMF will refuse the terminal to perform the unmanned flight service. If the indication information indicates that the terminal has aviation capability, the subsequent SMF judges to reject or accept the terminal to perform the unmanned flight service according to the method described above.
  • the authentication authorization response message in step 603 above further includes another indication information, which indicates whether the terminal has aviation capability. If the indication information indicates that the terminal has no aeronautical capability, the subsequent SMF will refuse the terminal to perform the unmanned flight service. If the indication information indicates that the terminal has aviation capability, the subsequent SMF judges to reject or accept the terminal to perform the unmanned flight service according to the method described above.
  • the SMF may also know whether the terminal has the aviation capability through other methods, for example, the AMF sends indication information to the SMF, and the indication information indicates whether the terminal has the aviation capability.
  • the SMF receives the PDU session establishment request message in the above step 601
  • it considers that the terminal has aviation capability because the terminal actually sends the PDU session establishment request message to the AMF first, and then the AMF forwards the PDU session establishment request message to the SMF , since the AMF does not reject the PDU session establishment request message, it indicates that the terminal has aviation capability.
  • the SMF judges to reject or accept the terminal to perform unmanned flight business according to the method described above.
  • the PDU session management request message in step 605 is not a request to establish a session for the unmanned flight service, but a request to establish a session for the first service.
  • the SMF also needs to judge whether the first service is an unmanned flight service. If the first service is an unmanned flight service, the SMF judges whether to reject or accept the terminal to perform unmanned flight according to the method described above. business. If the first service is not an unmanned flight service, the SMF may perform subsequent procedures according to methods in the prior art, such as performing a procedure of establishing or modifying a PDU session.
  • the PDU session management request message in the above step 605 is used to request the establishment of a session for the unmanned flight service.
  • the PDU session management request message includes indication information, and the indication information is used to request the establishment of a session A session for C2 communication, or request to modify the session for C2 communication.
  • C2 communication refers to the communication between the terminal and the controller, and the service corresponding to the C2 communication in the embodiment of this application is an unmanned flight service.
  • the SMF determines that the service corresponding to the C2 communication is an unmanned flight service, and then determines that the PDU session management request message is used to request establishment of a session for the unmanned flight service.
  • the SMF judges to reject or accept the terminal to perform the unmanned flight service according to the method described above.
  • the service corresponding to C2 communication may or may not be the unmanned flight service.
  • the services corresponding to C2 communication discussed in the embodiments of this application are all unmanned flight services. business.
  • the cause value described in the embodiment corresponding to FIG. 6 may be that the unmanned flight service is prohibited, Alternatively, C2 communication may be prohibited.
  • the AMF and the SMF include hardware structures and/or software modules corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software with reference to the units and method steps of the examples described in the embodiments disclosed in the present application. Whether a certain function is executed by hardware or computer software drives the hardware depends on the specific application scenario and design constraints of the technical solution.
  • FIG. 7 and FIG. 8 are schematic structural diagrams of a possible communication device provided by an embodiment of the present application. These communication devices can be used to implement the functions of the AMF or SMF in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments.
  • the communication device may be an AMF or an SMF, or may be a module (such as a chip) applied to the AMF or the SMF.
  • a communication device 700 includes a processing unit 710 and a transceiver unit 720 .
  • the communication device 700 is configured to implement the functions of the AMF or the SMF in the foregoing method embodiments.
  • the communication device is used to realize the functions of the above-mentioned AMF or SMF: the transceiver unit 720 is used to receive the non-access stratum NAS message from the terminal, the terminal is an urban air vehicle; the processing unit 710, A response message for rejecting or accepting the NAS message is sent to the terminal through the transceiver unit 720 according to the subscription information of the terminal, where the subscription information indicates whether the terminal is allowed to perform the unmanned flight service.
  • the transceiving unit 720 is further configured to request the subscription information of the terminal from the subscription data management network element; and receive the subscription information from the subscription data management network element.
  • the response message of rejecting the NAS message includes a cause value, where the cause value is to prohibit the unmanned flight service.
  • the processing unit 710 is further configured to determine to reject or accept the NAS message according to the subscription information.
  • the processing unit 710 is specifically configured to determine to reject the NAS message if the subscription information indicates that the terminal is not allowed to perform the unmanned flight service.
  • the processing unit 710 is specifically configured to send an authorization request message to the authentication and authorization server through the transceiver unit 720 if the subscription information indicates that the terminal is allowed to perform unmanned flight services, and the authorization request message requests the terminal to perform unmanned flight services.
  • Authorize the unmanned flight service of the terminal receive an authorization response message from the authentication and authorization server through the transceiver unit 720, the authorization response message indicating authorization failure; determine to reject the NAS message according to the authorization response message.
  • the processing unit 710 is specifically configured to send an authorization request message to the authentication and authorization server through the transceiver unit 720 if the subscription information indicates that the terminal is allowed to perform unmanned flight services, and the authorization request message requests the terminal to perform unmanned flight services.
  • Authorize the unmanned flight service of the terminal receive an authorization response message from the authentication authorization server through the transceiver unit 720, and the authorization response message indicates that the authorization is successful; according to the authorization response message, determine to accept the NAS message.
  • the subscription information indicates whether the terminal is allowed to perform unmanned flight services, including: the subscription information indicates whether the terminal is allowed to perform unmanned flight services if the flight type of the terminal is a manned type .
  • the processing unit 710 is specifically configured to, if the subscription information indicates that the terminal's flight type is manned, the terminal is not allowed to perform unmanned flight services, and the terminal's flight type is manned. Person type, determine to reject the NAS message.
  • the processing unit 710 is specifically configured to allow the terminal to perform unmanned flight services if the subscription information indicates that the flight type of the terminal is manned, and the flight type of the terminal is manned Type, the authorization request message is sent to the authentication authorization server through the transceiver unit 720, and the authorization request message requests the unmanned flight service of the terminal to be authorized; the authorization response message from the authentication authorization server is received through the transceiver unit 720, and the authorization response The message indicates authorization failure; according to the authorization response message, it is determined to reject the NAS message.
  • the processing unit 710 is specifically configured to allow the terminal to perform unmanned flight services if the subscription information indicates that the flight type of the terminal is manned, and the flight type of the terminal is manned Type, the authorization request message is sent to the authentication authorization server through the transceiver unit 720, and the authorization request message requests the unmanned flight service of the terminal to be authorized; the authorization response message from the authentication authorization server is received through the transceiver unit 720, and the authorization response The message indicates that the authorization is successful; according to the authorization response message, it is determined to accept the NAS message.
  • the NAS message is a session management request message
  • the session management request message requests to establish a session for the unmanned flight service.
  • the communication device is used to implement the above-mentioned SMF function: the transceiver unit 720 is used to receive a session management request message and indication information, and the session management request message requests to establish a session for unmanned flight services , the indication information indicates whether the terminal is allowed to perform unmanned flight services, the terminal is an urban air vehicle; the processing unit 710 is configured to send a message of rejecting or accepting the session management request to the terminal through the transceiver unit 720 according to the indication information response message.
  • the response message of rejecting the session management request message includes a cause value, where the cause value is to prohibit the unmanned flight service.
  • the processing unit 710 is further configured to determine to reject or accept the session management request message according to the indication information.
  • the processing unit 710 is specifically configured to determine to reject the session management request message if the indication information indicates that the terminal is not allowed to perform the unmanned flight service.
  • the processing unit 710 is specifically configured to send an authorization request message to the authentication and authorization server through the transceiver unit 720 if the indication information indicates that the terminal is allowed to perform the unmanned flight service, and the authorization request message is used to request Authorize the unmanned flight service of the terminal; receive an authorization response message from the authentication authorization server through the transceiver unit 720, the authorization response message indicating authorization failure; determine to reject the session management request message according to the authorization response message.
  • the processing unit 710 is specifically configured to send an authorization request message to the authentication and authorization server through the transceiver unit 720 if the indication information indicates that the terminal is allowed to perform the unmanned flight service, and the authorization request message is used to request Authorize the unmanned flight service of the terminal; receive an authorization response message from the authentication authorization server through the transceiver unit 720, the authorization response message indicating that the authorization is successful; according to the authorization response message, determine to accept the session management request message.
  • the indication information indicates whether the terminal is allowed to perform the unmanned flight service, including: the indication information indicates whether the terminal is allowed to perform the unmanned flight service if the flight type of the terminal is the manned type .
  • the processing unit 710 is specifically configured to not allow the terminal to perform unmanned flight services if the indication information indicates that the flight type of the terminal is manned, and the flight type of the terminal is manned. type, determine to reject the session management request message.
  • the processing unit 710 is specifically configured to allow the terminal to perform unmanned flight services if the indication information indicates that the flight type of the terminal is manned, and the flight type of the terminal is manned Type, send an authorization request message to the authentication authorization server through the transceiver unit 720, and the authorization request message is used to request authorization for the unmanned flight service of the terminal; receive an authorization response message from the authentication authorization server through the transceiver unit 720, the The authorization response message indicates authorization failure; according to the authorization response message, it is determined to reject the session management request message.
  • the processing unit 710 is specifically configured to allow the terminal to perform unmanned flight services if the indication information indicates that the flight type of the terminal is manned, and the flight type of the terminal is manned Type, send an authorization request message to the authentication authorization server through the transceiver unit 720, and the authorization request message is used to request authorization for the unmanned flight service of the terminal; receive an authorization response message from the authentication authorization server through the transceiver unit 720, the The authorization response message indicates that the authorization is successful; according to the authorization response message, it is determined to accept the session management request message.
  • the transceiving unit 720 is specifically configured to receive the session management request message and the indication information from the mobility management network element.
  • the communication device is used to implement the functions of the above-mentioned AMF or SMF: the transceiver unit 720 is used to send an authentication authorization request message to the authentication authorization server, and the authentication authorization request message is used to request authentication and authorization of the terminal , the terminal is an urban air vehicle; receive an authentication authorization response message from the authentication authorization server, the authentication authorization response message includes indication information, and the indication information indicates whether the terminal is allowed to perform unmanned flight services; receive the authentication authorization response message from the terminal A non-access stratum NAS message; the processing unit 710 is configured to send a response message rejecting or accepting the NAS message to the terminal through the transceiver unit 720 according to the indication information.
  • the response message of rejecting the NAS message includes a cause value, where the cause value is to prohibit the unmanned flight service.
  • the processing unit 710 is specifically configured to determine to reject or accept the NAS message according to the indication information.
  • the processing unit 710 is specifically configured to determine to reject the NAS message if the indication information indicates that the terminal is not allowed to perform the unmanned flight service.
  • the processing unit 710 is specifically configured to send an authorization request message to the authentication and authorization server through the transceiver unit 720 if the indication information indicates that the terminal is allowed to perform the unmanned flight service, and the authorization request message is used for Requesting authorization for the unmanned flight service of the terminal; receiving an authorization response message from the authentication authorization server through the transceiver unit 720, the authorization response message indicating authorization failure; determining to reject the NAS message according to the authorization response message.
  • the processing unit 710 is specifically configured to send an authorization request message to the authentication and authorization server through the transceiver unit 720 if the indication information indicates that the terminal is allowed to perform the unmanned flight service, and the authorization request message is used for Request to authorize the unmanned flight service of the terminal; receive an authorization response message from the authentication authorization server through the transceiver unit 720, the authorization response message indicating that the authorization is successful; according to the authorization response message, determine to accept the NAS message.
  • the indication information indicates whether the terminal is allowed to perform the unmanned flight service, including: the indication information indicates whether the terminal is allowed to perform the unmanned flight service if the flight type of the terminal is the manned type .
  • the processing unit 710 is specifically configured to not allow the terminal to perform unmanned flight services if the indication information indicates that the flight type of the terminal is manned, and the flight type of the terminal is manned. Person type, determine to reject the NAS message.
  • the processing unit 710 is specifically configured to allow the terminal to perform unmanned flight services if the indication information indicates that the flight type of the terminal is manned, and the flight type of the terminal is manned Type, send an authorization request message to the authentication authorization server through the transceiver unit 720, and the authorization request message is used to request authorization for the unmanned flight service of the terminal; receive an authorization response message from the authentication authorization server through the transceiver unit 720, The authorization response message indicates that the authorization is successful; according to the authorization response message, it is determined to accept the NAS message.
  • processing unit 710 and the transceiver unit 720 can be directly obtained by referring to related descriptions in the above method embodiments, and details are not repeated here.
  • the communication device 800 includes a processor 810 and an interface circuit 820 .
  • the processor 810 and the interface circuit 820 are coupled to each other.
  • the interface circuit 820 may be a transceiver or an input/output interface.
  • the communication device 800 may further include a memory 830 for storing instructions executed by the processor 810 or storing input data required by the processor 810 to execute the instructions or storing data generated after the processor 810 executes the instructions.
  • the processor 810 is used to implement the functions of the processing unit 710
  • the interface circuit 820 is used to implement the functions of the transceiver unit 720 .
  • processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and may also be other general processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • CPU central processing unit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor can be a microprocessor, or any conventional processor.
  • the method steps in the embodiments of the present application may be implemented by means of hardware, or may be implemented by means of a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only Memory, registers, hard disk, removable hard disk, CD-ROM or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
  • the storage medium may also be a component of the processor.
  • the processor and storage medium can be located in the ASIC.
  • the ASIC can be located in the base station or the terminal.
  • the processor and the storage medium may also exist in the base station or the terminal as discrete components.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product comprises one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, a base station, user equipment or other programmable devices.
  • the computer program or instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions may be downloaded from a website, computer, A server or data center transmits to another website site, computer, server or data center by wired or wireless means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrating one or more available media.
  • the available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disk; and it may also be a semiconductor medium, such as a solid state disk.
  • the computer readable storage medium may be a volatile or a nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.
  • “at least one” means one or more, and “multiple” means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the contextual objects are an “or” relationship; in the formulas of this application, the character “/” indicates that the contextual objects are a "division” Relationship.

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Abstract

本申请提供一种通信方法及通信装置。该方法包括：收到城市空中交通工具发送的NAS消息，根据该城市空中交通工具的签约信息所指示的允许城市空中交通工具执行无人驾驶飞行业务或不允许城市空中交通工具执行无人驾驶飞行业务，决定向城市空中交通工具发送拒绝NAS消息的响应消息或接受NAS消息的响应消息。该方法对城市空中交通工具执行无人驾驶飞行业务进行有效控制，可以避免不能执行无人驾驶飞行业务的城市空中交通工具去执行无人驾驶飞行业务，从而提升城市空中交通工具飞行时的安全性。

Description

一种通信方法及通信装置
相关申请的交叉引用
本申请要求在2021年10月19日提交中国专利局、申请号为202111215362.9、申请名称为“一种通信方法及通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及通信装置。
背景技术
交通拥挤是城市的常见现象，每年因地面交通拥挤带来的长时间通勤导致严重的经济损失。城市空中交通(urban air mobility，UAM)是未来可能的一种城市交通方式，可以缓解交通拥挤问题。
城市空中交通中，通过城市空中交通工具在城市内或城市间飞行来载物或载人，城市空中交通工具可以有固定的航道，还可以在设置的停靠站点进行停靠。
如何提升城市空中交通工具飞行时的安全性，是目前需要解决的。
发明内容
本申请实施例提供一种通信方法及通信装置，用于提升城市空中交通工具飞行时的安全性。
第一方面，本申请实施例提供一种通信方法，该方法可以由会话管理网元、移动性管理网元、应用于会话管理网元的模块(如芯片)或应用于移动性管理网元中的模块(如芯片)来执行。该方法包括：接收来自终端的非接入层NAS消息，该终端是城市空中交通工具；根据该终端的签约信息，向该终端发送拒绝或接受该NAS消息的响应消息，该签约信息指示是否允许该终端执行无人驾驶飞行业务。
根据上述方案，若城市空中交通工具发送一个NAS消息，根据该城市空中交通工具的签约信息所指示的允许城市空中交通工具执行无人驾驶飞行业务或不允许城市空中交通工具执行无人驾驶飞行业务，决定向城市空中交通工具发送拒绝NAS消息的响应消息或接受NAS消息的响应消息。该方法对城市空中交通工具执行无人驾驶飞行业务进行有效控制，可以避免不能执行无人驾驶飞行业务的城市空中交通工具去执行无人驾驶飞行业务，从而提升城市空中交通工具飞行时的安全性。
作为一种实现方法，向签约数据管理网元请求该终端的签约信息；接收来自该签约数据管理网元的该签约信息。
作为一种实现方法，该拒绝该NAS消息的响应消息包括原因值，该原因值为禁止无人驾驶飞行业务。
该方法，通过向终端告知拒绝的原因，从而终端不再发起无人驾驶飞行业务，有助于 减少终端的信令开销。
作为一种实现方法，根据该签约信息，确定拒绝或接受该NAS消息。
作为一种实现方法，若该签约信息指示不允许该终端执行无人驾驶飞行业务，确定拒绝该NAS消息。
上述方法，若该签约信息指示不允许该终端执行无人驾驶飞行业务，则直接拒绝该NAS消息，不需要再向认证授权服务器请求对该终端的无人驾驶飞行业务进行授权，可以减少信令开销。
作为一种实现方法，若该签约信息指示允许该终端执行无人驾驶飞行业务，向认证授权服务器发送授权请求消息，该授权请求消息请求对该终端的无人驾驶飞行业务进行授权；接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权失败；根据该授权响应消息，确定拒绝该NAS消息。
作为一种实现方法，若该签约信息指示允许该终端执行无人驾驶飞行业务，向认证授权服务器发送授权请求消息，该授权请求消息请求对该终端的无人驾驶飞行业务进行授权；接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权成功；根据该授权响应消息，确定接受该NAS消息。
根据该方法，若确定允许该终端的无人驾驶飞行业务，则还需要请求认证授权服务器对该终端的无人驾驶飞行业务进行授权，只有认证授权服务器授权该终端的无人驾驶飞行业务，则确定接受上述NAS消息，即允许终端的无人驾驶飞行业务，从而可以保障城市空中交通工具在飞行时的安全性。
作为一种实现方法，该签约信息指示若该终端的飞行类型为载人类型，是否允许该终端执行无人驾驶飞行业务。
作为一种实现方法，若该签约信息指示若该终端的飞行类型为载人类型，不允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，确定拒绝该NAS消息。
该方法，若该签约信息指示若该终端的飞行类型为载人类型，不允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，则直接拒绝该NAS消息，不需要再向认证授权服务器请求对该终端的无人驾驶飞行业务进行授权，可以减少信令开销。
作为一种实现方法，若该签约信息指示若该终端的飞行类型为载人类型，允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，向认证授权服务器发送授权请求消息，该授权请求消息请求对该终端的无人驾驶飞行业务进行授权；接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权失败；根据该授权响应消息，确定拒绝该NAS消息。
作为一种实现方法，若该签约信息指示若该终端的飞行类型为载人类型，允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，向认证授权服务器发送授权请求消息，该授权请求消息请求对该终端的无人驾驶飞行业务进行授权；接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权成功；根据该授权响应消息，确定接受该NAS消息。
根据该方法，若确定允许该终端的无人驾驶飞行业务，则还需要请求认证授权服务器对该终端的无人驾驶飞行业务进行授权，只有认证授权服务器授权该终端的无人驾驶飞行业务，则确定接受上述NAS消息，即允许终端的无人驾驶飞行业务，从而可以保障城市空中交通工具在飞行时的安全性。
作为一种实现方法，该NAS消息为会话管理请求消息，该会话管理请求消息请求建立用于无人驾驶飞行业务的会话。
第二方面，本申请实施例提供一种通信方法，该方法可以由会话管理网元或应用于会话管理网元中的模块(如芯片)来执行。该方法包括：接收会话管理请求消息和指示信息，该会话管理请求消息请求建立用于无人驾驶飞行业务的会话，该指示信息指示是否允许终端执行无人驾驶飞行业务，该终端是城市空中交通工具；根据该指示信息，向该终端发送拒绝或接受该会话管理请求消息的响应消息。
根据上述方案，若城市空中交通工具发送一个会话管理请求消息，可以根据指示允许城市空中交通工具执行无人驾驶飞行业务或不允许城市空中交通工具执行无人驾驶飞行业务的指示信息，决定向城市空中交通工具发送拒绝会话管理请求消息的响应消息或接受会话管理请求消息的响应消息。该方法对城市空中交通工具执行无人驾驶飞行业务进行有效控制，可以避免不能执行无人驾驶飞行业务的城市空中交通工具去执行无人驾驶飞行业务，从而提升城市空中交通工具飞行时的安全性。
作为一种实现方法，该拒绝该会话管理请求消息的响应消息包括原因值，该原因值为禁止无人驾驶飞行业务。
该方法，通过向终端告知拒绝的原因，从而终端不再发起无人驾驶飞行业务，有助于减少终端的信令开销。
作为一种实现方法，根据该指示信息，确定拒绝或接受该会话管理请求消息。
作为一种实现方法，若该指示信息指示不允许该终端执行无人驾驶飞行业务，确定拒绝该会话管理请求消息。
作为一种实现方法，若该指示信息指示允许该终端执行无人驾驶飞行业务，向认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权失败；根据该授权响应消息，确定拒绝该会话管理请求消息。
作为一种实现方法，若该指示信息指示允许该终端执行无人驾驶飞行业务，向认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权成功；根据该授权响应消息，确定接受该会话管理请求消息。
根据该方法，若确定允许该终端的无人驾驶飞行业务，则还需要请求认证授权服务器对该终端的无人驾驶飞行业务进行授权，只有认证授权服务器授权该终端的无人驾驶飞行业务，则确定接受上述会话管理请求消息，即允许终端的无人驾驶飞行业务，从而可以保障城市空中交通工具在飞行时的安全性。
作为一种实现方法，该指示信息指示若该终端的飞行类型为载人类型，是否允许该终端执行无人驾驶飞行业务。
作为一种实现方法，若该指示信息指示若该终端的飞行类型为载人类型，不允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，确定拒绝该会话管理请求消息。
该方法，若该签约信息指示若该终端的飞行类型为载人类型，不允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，则直接拒绝该会话管理请求消息，不需要再向认证授权服务器请求对该终端的无人驾驶飞行业务进行授权，可以减少信令开销。
作为一种实现方法，若该指示信息指示若该终端的飞行类型为载人类型，允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，向认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权失败；根据该授权响应消息，确定拒绝该会话管理请求消息。
作为一种实现方法，若该指示信息指示若该终端的飞行类型为载人类型，允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，向认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权成功；根据该授权响应消息，确定接受该会话管理请求消息。
根据该方法，若确定允许该终端的无人驾驶飞行业务，则还需要请求认证授权服务器对该终端的无人驾驶飞行业务进行授权，只有认证授权服务器授权该终端的无人驾驶飞行业务，则确定接受上述会话管理请求消息，即允许终端的无人驾驶飞行业务，从而可以保障城市空中交通工具在飞行时的安全性。
作为一种实现方法，接收来自移动性管理网元的该会话管理请求消息和该指示信息。
第三方面，本申请实施例提供一种通信方法，该方法可以由会话管理网元、移动性管理网元、应用于会话管理网元的模块(如芯片)或应用于移动性管理网元中的模块(如芯片)来执行。该方法包括：向认证授权服务器发送认证授权请求消息，该认证授权请求消息用于请求对终端进行认证授权，该终端是城市空中交通工具；接收来自该认证授权服务器的认证授权响应消息，该认证授权响应消息包括指示信息，该指示信息指示是否允许该终端执行无人驾驶飞行业务；接收来自该终端的非接入层NAS消息；根据该指示信息，向该终端发送拒绝或接受该NAS消息的响应消息。
根据上述方案，若城市空中交通工具发送一个NAS消息，根据来自认证授权服务器的指示允许城市空中交通工具执行无人驾驶飞行业务或不允许城市空中交通工具执行无人驾驶飞行业务的第一指示信息，决定向城市空中交通工具发送拒绝NAS消息的响应消息或接受NAS消息的响应消息。该方法对城市空中交通工具执行无人驾驶飞行业务进行有效控制，可以避免不能执行无人驾驶飞行业务的城市空中交通工具去执行无人驾驶飞行业务，从而提升城市空中交通工具飞行时的安全性。
作为一种实现方法，该拒绝该NAS消息的响应消息包括原因值，该原因值为禁止无人驾驶飞行业务。
该方法，通过向终端告知拒绝的原因，从而终端不再发起无人驾驶飞行业务，有助于减少终端的信令开销。
作为一种实现方法，根据该指示信息，确定拒绝或接受该NAS消息。
作为一种实现方法，若该指示信息指示不允许该终端执行无人驾驶飞行业务，确定拒绝该NAS消息。
作为一种实现方法，若该指示信息指示允许该终端执行无人驾驶飞行业务，向该认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权失败；根据该授权响应消息，确定拒绝该NAS消息。
作为一种实现方法，若该指示信息指示允许该终端执行无人驾驶飞行业务，向该认证 授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权成功；根据该授权响应消息，确定接受该NAS消息。
根据该方法，若确定允许该终端的无人驾驶飞行业务，则还需要请求认证授权服务器对该终端的无人驾驶飞行业务进行授权，只有认证授权服务器授权该终端的无人驾驶飞行业务，则确定接受上述NAS消息，即允许终端的无人驾驶飞行业务，从而可以保障城市空中交通工具在飞行时的安全性。
作为一种实现方法，该指示信息指示若该终端的飞行类型为载人类型，是否允许该终端执行无人驾驶飞行业务。
作为一种实现方法，若该指示信息指示若该终端的飞行类型为载人类型，不允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，确定拒绝该NAS消息。
作为一种实现方法，若该指示信息指示若该终端的飞行类型为载人类型，允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，向该认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权失败；根据该授权响应消息，确定拒绝该NAS消息。
作为一种实现方法，若该指示信息指示若该终端的飞行类型为载人类型，允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，向该认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权成功；根据该授权响应消息，确定接受该NAS消息。
根据该方法，若确定允许该终端的无人驾驶飞行业务，则还需要请求认证授权服务器对该终端的无人驾驶飞行业务进行授权，只有认证授权服务器授权该终端的无人驾驶飞行业务，则确定接受上述NAS消息，即允许终端的无人驾驶飞行业务，从而可以保障城市空中交通工具在飞行时的安全性。
作为一种实现方法，该NAS消息为会话管理请求消息，该会话管理请求消息请求建立用于无人驾驶飞行业务的会话。
第四方面，本申请实施例提供一种通信装置，该装置可以是会话管理网元、移动性管理网元、应用于会话管理网元的模块(如芯片)或应用于移动性管理网元中的模块(如芯片)。该装置具有实现上述第一方面的任意实现方法或第三方面的任意实现方法的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第五方面，本申请实施例提供一种通信装置，该装置可以是会话管理网元或应用于会话管理网元中的模块(如芯片)。该装置具有实现上述第二方面的任意实现方法的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第六方面，本申请实施例提供一种通信装置，包括处理器和存储器；该存储器用于存储计算机指令，当该装置运行时，该处理器执行该存储器存储的计算机指令，以使该装置执行上述第一方面至第三方面中的任意实现方法。
第七方面，本申请实施例提供一种通信装置，包括用于执行上述第一方面至第三方面 中的任意实现方法的各个步骤的单元或手段(means)。
第八方面，本申请实施例提供一种通信装置，包括处理器和接口电路，所述处理器用于通过接口电路与其它装置通信，并执行上述第一方面至第三方面中的任意实现方法。该处理器包括一个或多个。
第九方面，本申请实施例提供一种通信装置，包括与存储器耦合的处理器，该处理器用于调用所述存储器中存储的程序，以执行上述第一方面至第三方面中的任意实现方法。该存储器可以位于该装置之内，也可以位于该装置之外。且该处理器可以是一个或多个。
第十方面，本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在通信装置上运行时，使得上述第一方面至第三方面中的任意实现方法被执行。
第十一方面，本申请实施例还提供一种计算机程序产品，该计算机程序产品包括计算机程序或指令，当计算机程序或指令被通信装置运行时，使得上述第一方面至第三方面中的任意实现方法被执行。
第十二方面，本申请实施例还提供一种芯片系统，包括：处理器，用于执行上述第一方面至第三方面中的任意实现方法。
附图说明
图1(a)为基于服务化架构的5G网络架构示意图；
图1(b)为基于点对点接口的5G网络架构示意图；
图2(a)为本申请实施例提供的一种通信方法的流程示意图；
图2(b)为本申请实施例提供的一种通信方法的流程示意图；
图2(c)为本申请实施例提供的一种通信方法的流程示意图；
图2(d)为本申请实施例提供的一种通信方法的流程示意图；
图2(e)为本申请实施例提供的一种通信方法的流程示意图；
图3为本申请实施例提供的一种通信方法的流程示意图；
图4为本申请实施例提供的一种通信方法的流程示意图；
图5为本申请实施例提供的一种通信方法的流程示意图；
图6为本申请实施例提供的一种通信方法的流程示意图；
图7为本申请实施例提供的一种通信装置示意图；
图8为本申请实施例提供的一种通信装置示意图。
具体实施方式
图1(a)为基于服务化架构的5G网络架构示意图。图1(a)所示的第五代(the 5th generation，5G)网络架构中可包括数据网络(data network，DN)和以下网元中的一个或多个：统一数据管理(unified data management，UDM)网元、统一数据库(unified data repository，UDR)、网络开放功能(network exposure function，NEF)网元(图中未示出)、应用功能(application function，AF)网元、策略控制功能(policy control function，PCF)网元、接入与移动性管理功能(access and mobility management function，AMF)网元、会话管理功能(session management function，SMF)网元、用户面功能(user plane function， UPF)网元、无线接入网(radio access network，RAN)设备、无人机系统(uncrewed aerial system，UAS)服务供应商(UAS service supplier，USS)服务器(图中未示出，以下简称为USS)。
无线接入网设备可以是基站(base station)、演进型基站(evolved NodeB，eNodeB)、发送接收点(transmission reception point，TRP)、5G移动通信系统中的下一代基站(next generation NodeB，gNB)、6G移动通信系统中的下一代基站、未来移动通信系统中的基站或无线保真(wireless fidelity，WiFi)系统中的接入节点等；也可以是完成基站部分功能的模块或单元，例如，可以是集中式单元(central unit，CU)，也可以是分布式单元(distributed unit，DU)。无线接入网设备可以是宏基站，也可以是微基站或室内站，还可以是中继节点或施主节点等。本申请的实施例对无线接入网设备所采用的具体技术和具体设备形态不做限定。为便于说明，在本申请的实施例中，以基站作为无线接入网设备的一个举例进行描述。
与RAN通信的终端也可以称为终端设备、用户设备(user equipment，UE)、移动台、移动终端等。终端可以广泛应用于各种场景，例如，设备到设备(device-to-device，D2D)、车物(vehicle to everything，V2X)通信、机器类通信(machine-type communication，MTC)、物联网(internet of things，IOT)、虚拟现实、增强现实、工业控制、自动驾驶、远程医疗、智能电网、智能家具、智能办公、智能穿戴、智能交通、智慧城市等。终端可以是手机、平板电脑、带无线收发功能的电脑、可穿戴设备、车辆、城市空中交通工具(如无人驾驶机、直升机等)、轮船、机器人、机械臂、智能家居设备等。本申请实施例以终端是城市空中交通工具为例进行说明。其中，城市空中交通工具是一种接入网络的终端，举例来说可以是装载全球用户识别卡(universal subscriber identity module，USIM)卡的城市空中交通UAM。
基站和终端可以是固定位置的，也可以是可移动的。基站和终端可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在空中的飞机、气球和人造卫星上。本申请的实施例对基站和终端的应用场景不做限定。
AMF网元，包含执行移动性管理、接入鉴权/授权等功能。此外，还负责在终端与PCF间传递用户策略。
SMF网元，包含执行会话管理、PCF下发控制策略的执行、UPF的选择、终端的互联网协议(internet protocol，IP)地址分配等功能。
UPF网元，作为和数据网络的接口，包含完成用户面数据转发、基于会话/流级的计费统计，带宽限制等功能。
UDM网元，包含执行管理签约数据、用户接入授权等功能。
UDR，包含执行签约数据、策略数据、应用数据等类型数据的存取功能。
NEF网元，用于支持能力和事件的开放。
AF网元，传递应用侧对网络侧的需求，例如，QoS需求或用户状态事件订阅等。AF可以是第三方功能实体，也可以是运营商部署的应用服务器。
PCF网元，包含负责针对会话、业务流级别进行计费、QoS带宽保障及移动性管理、终端策略决策等策略控制功能。
USS，用于为城市空中交通工具安全和有效使用空域提供服务，负责城市空中交通工具的认证授权、飞行计划授权、命令和控制(command and control，C2)通信的授权、无 人驾驶飞行业务的授权或城市空中交通工具的识别追踪等。其中，C2通信是控制器与城市空中交通工具之间的通信，C2通信用于控制器向城市空中交通工具发送控制消息或命令消息。
DN，是位于运营商网络之外的网络，运营商网络可以接入多个DN，DN上可部署多种业务，可为终端提供数据和/或语音等服务。例如，DN是某智能工厂的私有网络，智能工厂安装在车间的传感器可为终端，DN中部署了传感器的控制服务器，控制服务器可为传感器提供服务。传感器可与控制服务器通信，获取控制服务器的指令，根据指令将采集的传感器数据传送给控制服务器等。又例如，DN是某公司的内部办公网络，该公司员工的手机或者电脑可为终端，员工的手机或者电脑可以访问公司内部办公网络上的信息、数据资源等。
图1(a)中Npcf、Nudr、Nudm、Naf、Namf、Nsmf分别为上述PCF、UDR、UDM、AF、AMF和SMF提供的服务化接口，用于调用相应的服务化操作。N1、N2、N3、N4，以及N6为接口序列号，这些接口序列号的含义可参见图1(b)中的描述。
图1(b)为基于点对点接口的5G网络架构示意图，其中的网元的功能的介绍可以参考图1(a)中对应的网元的功能的介绍，不再赘述。图1(b)与图1(a)的主要区别在于：图1(a)中的各个控制面网元之间的接口是服务化的接口，图1(b)中的各个控制面网元之间的接口是点对点的接口。
在图1(b)所示的架构中，各个网元之间的接口名称及功能如下：
1)、N1：AMF与终端之间的接口，可以用于向终端传递QoS控制规则等。
2)、N2：AMF与RAN之间的接口，可以用于传递核心网侧至RAN的无线承载控制信息等。
3)、N3：RAN与UPF之间的接口，主要用于传递RAN与UPF间的上下行用户面数据。
4)、N4：SMF与UPF之间的接口，可以用于控制面与用户面之间传递信息，包括控制面向用户面的转发规则、QoS控制规则、流量统计规则等的下发以及用户面的信息上报。
5)、N5：AF与PCF之间的接口，可以用于应用业务请求下发以及网络事件上报。
6)、N6：UPF与DN的接口，用于传递UPF与DN之间的上下行用户数据流。
7)、N7：PCF与SMF之间的接口，可以用于下发协议数据单元(protocol data unit，PDU)会话粒度以及业务数据流粒度控制策略。
8)、N8：AMF与UDM间的接口，可以用于AMF向UDM获取接入与移动性管理相关签约数据与鉴权数据，以及AMF向UDM注册终端当前移动性管理相关信息等。
9)、N9：UPF和UPF之间的用户面接口，用于传递UPF间的上下行用户数据流。
10)、N10：SMF与UDM间的接口，可以用于SMF向UDM获取会话管理相关签约数据，以及SMF向UDM注册终端当前会话相关信息等。
11)、N11：SMF与AMF之间的接口，可以用于传递RAN和UPF之间的PDU会话隧道信息、传递发送给终端的控制消息、传递发送给RAN的无线资源控制信息等。
12)、N15：PCF与AMF之间的接口，可以用于下发终端策略及接入控制相关策略。
13)、N35：UDM与UDR间的接口，可以用于UDM从UDR中获取用户签约数据信息。
14)、N36：PCF与UDR间的接口，可以用于PCF从UDR中获取策略相关签约数据以及应用数据相关信息。
可以理解的是，上述网元或者功能既可以是硬件设备中的网络元件，也可以是在专用硬件上运行软件功能，或者是平台(例如，云平台)上实例化的虚拟化功能。可选的，上述网元或者功能可以由一个设备实现，也可以由多个设备共同实现，还可以是一个设备内的一个功能模块，本申请实施例对此不作具体限定。
本申请中的签约数据管理网元、移动性管理网元、会话管理网元、认证授权服务器分别可以是图1(a)或图1(b)中的UDM、AMF、SMF、USS，也可以是未来通信如6G网络中具有上述UDM、AMF、SMF、USS的功能的网元，本申请对此不限定。在本申请的实施例中，以UDM、AMF、SMF、USS分别为签约数据管理网元、移动性管理网元、会话管理网元、认证授权服务器的一个举例进行描述。
需要说明的是，图1(a)或图1(b)中所涉及的各个网元以及网元之间的通信接口的名称是以目前协议中规定的为例进行简单说明的，但并不限定本申请实施例只能够应用于目前已知的通信系统。因此，以目前协议为例描述时出现的标准名称，都是功能性描述，本申请对于网元、接口或信令等的具体名称并不限定，仅表示网元、接口或者信令的功能，可以对应的扩展到其它系统，比如2G、3G、4G、5G或未来通信系统中。
上述图1(a)或图1(b)所示的本申请实施例能够应用的网络架构仅是一种举例说明，适用本申请实施例的网络架构并不局限于此，任何能够实现上述各个网元的功能的网络架构都适用于本申请实施例。
为实现提升城市空中交通工具飞行时的安全性，本申请实施例提供一种通信方法，参考图2(a)，该方法包括以下步骤：
步骤201a，终端向SMF发送非接入层(non access stratum，NAS)消息，相应的，SMF接收该NAS消息。
该终端是城市空中交通工具。
作为一种实现方法，终端经过AMF将该NAS消息转发给SMF，其中终端与AMF之间以及AMF和SMF之间通过不同的消息包含该NAS消息。
作为一种实现方法，该NAS消息是会话管理请求消息，该会话管理请求消息请求建立用于无人驾驶飞行业务的会话。比如，该会话管理请求消息是会话建立请求消息，该会话建立请求消息请求建立一个新的用于无人驾驶飞行业务的会话。再比如，该会话管理请求消息是会话修改请求消息，该会话修改请求消息请求将已有的一个会话建立为用于无人驾驶飞行业务，也可以理解为将已有的一个会话修改为用于无人驾驶飞行业务。这里的会话管理请求消息的作用以及实现方法也适用于本申请其它实施例中的会话管理请求消息，后面不再赘述。
步骤202a，SMF根据终端的签约信息，向终端发送拒绝或接受NAS消息的响应消息。相应的，终端接收拒绝或接受NAS消息的响应消息。
该签约信息指示是否允许终端执行无人驾驶飞行业务。具体的，该签约信息指示允许终端执行无人驾驶飞行业务，或指示不允许终端执行无人驾驶飞行业务。
可选的，该签约信息中包含一个指示信息，该指示信息指示是否允许终端执行无人驾驶飞行业务。
根据上述方案，若城市空中交通工具发送一个NAS消息，SMF根据该城市空中交通 工具的签约信息所指示的允许城市空中交通工具执行无人驾驶飞行业务或不允许城市空中交通工具执行无人驾驶飞行业务，决定向城市空中交通工具发送拒绝NAS消息的响应消息或接受NAS消息的响应消息。该方法对城市空中交通工具执行无人驾驶飞行业务进行有效控制，可以避免不能执行无人驾驶飞行业务的城市空中交通工具去执行无人驾驶飞行业务，从而提升城市空中交通工具飞行时的安全性。
作为一种实现方法，SMF在上述步骤201a之后，在上述步骤202a之前，还可以向UDM请求该终端的签约信息，然后接收来自UDM的签约信息。也即，SMF从UDM获取该终端的签约信息。
作为一种实现方法，若上述步骤202a中SMF向终端发送拒绝NAS消息的响应消息，则该拒绝NAS消息的响应消息中可以携带原因值，该原因值为禁止无人驾驶飞行业务。通过向终端告知拒绝的原因，从而终端不再发起无人驾驶飞行业务，有助于减少终端的信令开销。
作为一种实现方法，在上述步骤202a之前，SMF还可以根据签约信息，判断拒绝上述NAS消息还是接受上述NAS消息。
比如，若终端的签约信息指示不允许终端执行无人驾驶飞行业务，则SMF确定拒绝上述NAS消息。该方法，若终端的签约信息指示不允许终端执行无人驾驶飞行业务，则SMF可以直接拒绝该NAS消息，不需要再向USS请求对该终端的无人驾驶飞行业务进行授权，可以减少信令开销。
再比如，若终端的签约信息指示允许终端执行无人驾驶飞行业务，则SMF可以进一步向USS发送授权请求消息，该授权请求消息用于请求对终端的无人驾驶飞行业务进行授权，然后SMF接收来自USS的授权响应消息，如果该授权响应消息指示授权失败，则SMF根据该授权响应消息，确定拒绝上述NAS消息，如果该授权响应消息指示授权成功，则SMF根据该授权响应消息，确定接受上述NAS消息。根据该方法，若SMF允许该终端的无人驾驶飞行业务，则SMF还需要请求USS对该终端的无人驾驶飞行业务进行授权，只有USS授权该终端的无人驾驶飞行业务，则SMF确定接受上述NAS消息，即允许终端的无人驾驶飞行业务，从而可以保障城市空中交通工具在飞行时的安全性。
作为一种实现方法，本申请实施例中，还可以结合终端的飞行类型，对终端的无人驾驶飞行业务进行控制，该飞行类型可以是载人类型或无人类型。比如，上述步骤202a中的终端的签约信息指示若终端的飞行类型为载人类型，是否允许终端执行无人驾驶飞行业务。
比如，若终端的签约信息指示若终端的飞行类型为载人类型，不允许终端执行无人驾驶飞行业务，且SMF确定该终端的飞行类型是载人类型，则SMF确定拒绝上述NAS消息。该方法，SMF可以直接拒绝该NAS消息，不需要再向USS请求对该终端的无人驾驶飞行业务进行授权，可以减少信令开销。
再比如，若终端的签约信息指示若终端的飞行类型为载人类型，允许终端执行无人驾驶飞行业务，且SMF确定该终端的飞行类型是载人类型，则SMF可以进一步向USS发送授权请求消息，该授权请求消息用于请求对终端的无人驾驶飞行业务进行授权，然后SMF接收来自USS的授权响应消息，如果该授权响应消息指示授权失败，则SMF根据该授权响应消息，确定拒绝上述NAS消息，如果该授权响应消息指示授权成功，则SMF根据该授权响应消息，确定接受上述NAS消息。根据该方法，若SMF允许该终端的无人驾驶飞行业务，则SMF还需要请求USS对该终端的无人驾驶飞行业务进行授权，只有USS授权 该终端的无人驾驶飞行业务，则SMF确定接受上述NAS消息，即允许终端的无人驾驶飞行业务，从而可以保障城市空中交通工具在飞行时的安全性。
再比如，若SMF确定该终端的飞行类型是无人类型，则SMF可以进一步向USS发送授权请求消息，该授权请求消息用于请求对终端的无人驾驶飞行业务进行授权，然后SMF接收来自USS的授权响应消息，如果该授权响应消息指示授权失败，则SMF根据该授权响应消息，确定拒绝上述NAS消息，如果该授权响应消息指示授权成功，则SMF根据该授权响应消息，确定接受上述NAS消息。根据该方法，若SMF允许该终端的无人驾驶飞行业务，则SMF还需要请求USS对该终端的无人驾驶飞行业务进行授权，只有USS授权该终端的无人驾驶飞行业务，则SMF确定接受上述NAS消息，即允许终端的无人驾驶飞行业务，从而可以保障城市空中交通工具在飞行时的安全性。该方法中，若终端的飞行类型是无人类型，则可以不需要参考终端的签约信息。
为实现提升城市空中交通工具飞行时的安全性，本申请实施例提供一种通信方法，参考图2(b)，该方法包括以下步骤：
步骤201b，终端向AMF发送NAS消息，相应的，AMF接收该NAS消息。
该终端是城市空中交通工具。
作为一种实现方法，该NAS消息包括会话管理请求消息和指示信息，该指示信息指示该会话管理请求消息请求建立用于无人驾驶飞行业务的会话。AMF接收该到NAS消息后，可以根据该指示信息，确定该会话管理请求消息请求建立用于无人驾驶飞行业务的会话。
步骤202b，AMF根据终端的签约信息，向终端发送拒绝或接受NAS消息的响应消息。相应的，终端接收拒绝或接受NAS消息的响应消息。
由于AMF根据上述指示信息，获知NAS消息中的会话管理请求消息请求建立用于无人驾驶飞行业务的会话，则AMF可以根据该指示信息，触发执行该步骤202b。
该签约信息指示是否允许终端执行无人驾驶飞行业务。可选的，该签约信息中包含一个指示信息，该指示信息指示是否允许终端执行无人驾驶飞行业务。
根据上述方案，若城市空中交通工具发送一个NAS消息，AMF根据该城市空中交通工具的签约信息所指示的允许城市空中交通工具执行无人驾驶飞行业务或不允许城市空中交通工具执行无人驾驶飞行业务，决定向城市空中交通工具发送拒绝NAS消息的响应消息或接受NAS消息的响应消息。该方法对城市空中交通工具执行无人驾驶飞行业务进行有效控制，可以避免不能执行无人驾驶飞行业务的城市空中交通工具去执行无人驾驶飞行业务，从而提升城市空中交通工具飞行时的安全性。
作为一种实现方法，AMF在上述步骤201b之前的终端注册流程中，可以向UDM请求该终端的签约信息，然后接收来自UDM的签约信息。也即，AMF从UDM获取该终端的签约信息。
作为一种实现方法，若上述步骤202b中AMF向终端发送拒绝NAS消息的响应消息，则该拒绝NAS消息的响应消息中可以携带原因值，该原因值为禁止无人驾驶飞行业务。通过向终端告知拒绝的原因，从而终端不再发起无人驾驶飞行业务，有助于减少终端的信令开销。
作为一种实现方法，在上述步骤202b之前，AMF还可以根据签约信息，判断拒绝上 述NAS消息还是接受上述NAS消息。其中，AMF判断拒绝上述NAS消息还是接受上述NAS消息的方法与上述图2(a)对应的实施例中SMF判断拒绝上述NAS消息还是接受上述NAS消息的方法类似，可参看前述描述。
作为一种实现方法，本申请实施例中，还可以结合终端的飞行类型，对终端的无人驾驶飞行业务进行控制，该飞行类型可以是载人类型或无人类型。比如，上述步骤202b中的终端的签约信息指示若终端的飞行类型为载人类型，是否允许终端执行无人驾驶飞行业务。其中，AMF判断拒绝上述NAS消息还是接受上述NAS消息的方法与上述图2(a)对应的实施例中SMF判断拒绝上述NAS消息还是接受上述NAS消息的方法类似，可参看前述描述。
为实现提升城市空中交通工具飞行时的安全性，本申请实施例提供一种通信方法，参考图2(c)，该方法包括以下步骤：
步骤200c，终端向AMF发送上行NAS消息，该上行NAS消息中包含会话管理请求消息，相应的，AMF接收该上行NAS消息。
该终端是城市空中交通工具。
该会话管理请求消息是终端发送给SMF的，该会话管理请求消息请求建立无人驾驶飞行业务的会话。
步骤201c，AMF向SMF发送会话管理请求消息和指示信息，相应的，SMF接收该会话管理请求消息和指示信息。
AMF收到该会话管理请求消息，但AMF不能解析该会话管理请求消息，因此AMF并不知道该会话管理请求消息请求建立用于无人驾驶飞行业务的会话。另外AMF可以获知是否允许该终端执行无人驾驶飞行业务，比如AMF可以获取该终端的签约信息，根据该终端的签约信息获知是否允许终端执行无人驾驶飞行业务。由于AMF不知道该会话管理请求消息请求建立用于无人驾驶飞行业务的会话，因此AMF无法判断是拒绝该会话管理请求消息还是接受该会话管理请求消息。AMF可以将该会话管理请求发送给SMF，同时还向SMF发送一个指示信息，该指示信息指示是否允许终端执行无人驾驶飞行业务，由于SMF可以解析该会话管理请求消息，因此SMF可以知道该会话管理请求消息请求建立用于无人驾驶飞行业务的会话，从而SMF可以根据该指示信息，判断是拒绝该会话管理请求消息还是接受该会话管理请求消息。
步骤202c，SMF根据指示信息，向终端发送拒绝或接受会话管理请求消息的响应消息。相应的，终端接收拒绝或接受会话管理请求消息的响应消息。
根据上述方案，若城市空中交通工具发送一个会话管理请求消息，SMF可以根据来自AMF的指示允许城市空中交通工具执行无人驾驶飞行业务或不允许城市空中交通工具执行无人驾驶飞行业务的指示信息，决定向城市空中交通工具发送拒绝会话管理请求消息的响应消息或接受会话管理请求消息的响应消息。该方法对城市空中交通工具执行无人驾驶飞行业务进行有效控制，可以避免不能执行无人驾驶飞行业务的城市空中交通工具去执行无人驾驶飞行业务，从而提升城市空中交通工具飞行时的安全性。
作为一种实现方法，若上述步骤202c中SMF向终端发送拒绝会话管理请求消息的响应消息，则该拒绝会话管理请求消息的响应消息中可以携带原因值，该原因值为禁止无人驾驶飞行业务。通过向终端告知拒绝的原因，从而终端不再发起无人驾驶飞行业务，有助 于减少终端的信令开销。
作为一种实现方法，在上述步骤202c之前，SMF还可以根据收到的指示信息，判断拒绝上述会话管理请求消息还是接受上述会话管理请求消息。其中，SMF判断拒绝上述会话管理请求消息还是接受上述会话管理请求消息的方法与上述图2(a)对应的实施例中SMF判断拒绝上述NAS消息还是接受上述NAS消息的方法类似，可参看前述描述。
作为一种实现方法，本申请实施例中，还可以结合终端的飞行类型，对终端的无人驾驶飞行业务进行控制，该飞行类型可以是载人类型或无人类型。比如，上述步骤202c中的指示信息指示若终端的飞行类型为载人类型，是否允许终端执行无人驾驶飞行业务。其中，SMF判断拒绝上述会话管理请求消息还是接受上述会话管理请求消息的方法与上述图2(a)对应的实施例中SMF判断拒绝上述NAS消息还是接受上述NAS消息的方法类似，可参看前述描述。
为实现提升城市空中交通工具飞行时的安全性，本申请实施例提供一种通信方法，参考图2(d)，该方法包括以下步骤：
步骤201d，AMF向USS发送认证授权请求消息。相应的，USS接收该认证授权请求消息。
该认证授权请求消息用于请求对终端进行认证授权，该终端是城市空中交通工具。
步骤202d，USS向AMF发送认证授权响应消息。相应的，AMF接收该认证授权响应消息。
该认证授权响应消息包括第一指示信息，该第一指示信息指示是否允许终端执行无人驾驶飞行业务。
步骤203d，终端向AMF发送NAS消息，相应的，AMF接收该NAS消息。
该终端是城市空中交通工具。
作为一种实现方法，该NAS消息包括会话管理请求消息和第二指示信息，该第二指示信息指示该会话管理请求消息请求建立用于无人驾驶飞行业务的会话。AMF接收该到NAS消息后，可以根据该第二指示信息，确定该会话管理请求消息请求建立用于无人驾驶飞行业务的会话。
步骤204d，AMF根据第一指示信息，向终端发送拒绝或接受NAS消息的响应消息。相应的，终端接收拒绝或接受NAS消息的响应消息。
由于AMF根据上述第二指示信息，获知NAS消息中的会话管理请求消息请求建立用于无人驾驶飞行业务的会话，则AMF可以根据该第二指示信息，触发执行该步骤204d。
根据上述方案，若城市空中交通工具发送一个NAS消息，AMF根据来自USS的指示允许城市空中交通工具执行无人驾驶飞行业务或不允许城市空中交通工具执行无人驾驶飞行业务的第一指示信息，决定向城市空中交通工具发送拒绝NAS消息的响应消息或接受NAS消息的响应消息。该方法对城市空中交通工具执行无人驾驶飞行业务进行有效控制，可以避免不能执行无人驾驶飞行业务的城市空中交通工具去执行无人驾驶飞行业务，从而提升城市空中交通工具飞行时的安全性。
作为一种实现方法，若上述步骤204d中AMF向终端发送拒绝NAS消息的响应消息，则该拒绝NAS消息的响应消息中可以携带原因值，该原因值为禁止无人驾驶飞行业务。通过向终端告知拒绝的原因，从而终端不再发起无人驾驶飞行业务，有助于减少终端的信 令开销。
作为一种实现方法，在上述步骤204d之前，AMF还可以根据第一指示信息，判断拒绝上述NAS消息还是接受上述NAS消息。其中，AMF判断拒绝上述NAS消息还是接受上述NAS消息的方法与上述图2(a)对应的实施例中SMF判断拒绝上述NAS消息还是接受上述NAS消息的方法类似，可参看前述描述。
作为一种实现方法，本申请实施例中，还可以结合终端的飞行类型，对终端的无人驾驶飞行业务进行控制，该飞行类型可以是载人类型或无人类型。比如，上述步骤204d中的第一指示信息指示若终端的飞行类型为载人类型，是否允许终端执行无人驾驶飞行业务。其中，AMF判断拒绝上述NAS消息还是接受上述NAS消息的方法与上述图2(a)对应的实施例中SMF判断拒绝上述NAS消息还是接受上述NAS消息的方法类似，可参看前述描述。
为实现提升城市空中交通工具飞行时的安全性，本申请实施例提供一种通信方法，参考图2(e)，该方法包括以下步骤：
步骤201e，SMF向USS发送认证授权请求消息。相应的，USS接收该认证授权请求消息。
该认证授权请求消息用于请求对终端进行认证授权，该终端是城市空中交通工具。
步骤202e，USS向SMF发送认证授权响应消息。相应的，AMF接收该认证授权响应消息。
该认证授权响应消息包括第一指示信息，该第一指示信息指示是否允许终端执行无人驾驶飞行业务。
步骤203e，终端向SMF发送NAS消息，相应的，SMF接收该NAS消息。
作为一种实现方法，终端向AMF发送该NAS消息，然后AMF将该NAS消息发送给SMF。该终端是城市空中交通工具。
作为一种实现方法，该NAS消息是会话管理请求消息。
步骤204e，SMF根据第一指示信息，向终端发送拒绝或接受NAS消息的响应消息。相应的，终端接收拒绝或接受NAS消息的响应消息。
根据上述方案，若城市空中交通工具发送一个NAS消息，SMF根据来自USS的指示允许城市空中交通工具执行无人驾驶飞行业务或不允许城市空中交通工具执行无人驾驶飞行业务的第一指示信息，决定向城市空中交通工具发送拒绝NAS消息的响应消息或接受NAS消息的响应消息。该方法对城市空中交通工具执行无人驾驶飞行业务进行有效控制，可以避免不能执行无人驾驶飞行业务的城市空中交通工具去执行无人驾驶飞行业务，从而提升城市空中交通工具飞行时的安全性。
作为一种实现方法，若上述步骤204e中SMF向终端发送拒绝NAS消息的响应消息，则该拒绝NAS消息的响应消息中可以携带原因值，该原因值为禁止无人驾驶飞行业务。通过向终端告知拒绝的原因，从而终端不再发起无人驾驶飞行业务，有助于减少终端的信令开销。
作为一种实现方法，在上述步骤204e之前，SMF还可以根据第一指示信息，判断拒绝上述NAS消息还是接受上述NAS消息。其中，SMF判断拒绝上述NAS消息还是接受上述NAS消息的方法与上述图2(a)对应的实施例中SMF判断拒绝上述NAS消息还是接受 上述NAS消息的方法类似，可参看前述描述。
作为一种实现方法，本申请实施例中，还可以结合终端的飞行类型，对终端的无人驾驶飞行业务进行控制，该飞行类型可以是载人类型或无人类型。比如，上述步骤204e中的第一指示信息指示若终端的飞行类型为载人类型，是否允许终端执行无人驾驶飞行业务。其中，SMF判断拒绝上述NAS消息还是接受上述NAS消息的方法与上述图2(a)对应的实施例中SMF判断拒绝上述NAS消息还是接受上述NAS消息的方法类似，可参看前述描述。
下面结合具体示例，对上述实现方法进行说明。
参考图3，为本申请实施例提供的一种通信方法。该方法包括以下步骤：
步骤301，USS对终端进行认证授权。
该终端是城市空中交通工具。
USS对终端进行认证授权，如果该终端是合法的，则可以进一步对该终端进行业务授权。如果该终端是不合法的，则不对该终端进行业务授权。本申请实施例中，USS对该终端认证结果为合法。
这里的终端可以是接入到3GPP网络的城市空中交通工具。
该步骤为可选步骤，如果是在会话建立流程中对终端进行认证授权，则该步骤301可以不执行。
步骤302，终端向SMF发送PDU会话管理请求(PDU session management request)消息。相应的，SMF接收该PDU会话管理请求消息。
该PDU会话管理请求消息请求建立用于无人驾驶飞行业务的会话。比如，该PDU会话管理请求消息是PDU会话建立请求(PDU session establishment request)消息，该PDU会话建立请求消息请求建立一个新的用于无人驾驶飞行业务的PDU会话。再比如，该PDU会话管理请求消息是PDU会话修改请求(PDU session modification request)消息，该PDU会话修改请求消息请求将已有的不是用于无人驾驶飞行业务的PDU会话建立为用于无人驾驶飞行业务的PDU会话，即将PDU会话修改为用于无人驾驶飞行业务。这里的PDU会话管理请求消息的作用以及实现方法也适用于本申请其它实施例中的PDU会话管理请求消息，后面不再赘述。
其中，该PDU会话管理请求消息请求建立用于无人驾驶飞行业务的会话，在具体实现中，可以是该PDU会话管理请求消息的名称用于请求建立用于无人驾驶飞行业务的会话，或者该PDU会话管理请求消息包含一个用于指示请求建立用于无人驾驶飞行业务的会话的指示信息。
步骤303，SMF向UDM发送签约数据请求(subscription datarequest)消息，相应的，UDM接收签约数据请求消息。
该签约数据请求消息用于请求终端的会话管理签约数据。
作为一种实现方法，该签约数据请求消息中包含终端的标识和请求的会话对应的数据网名称(data network name，DNN)和单网络切片选择辅助信息(single network slice selection assistance information，S-NSSAI)，该签约数据请求消息用于请求与该终端的标识以及该(DNN，S-NSSAI)对应的会话管理签约数据。
步骤304，UDM向SMF发送签约数据响应(subscription data response)消息，相应的， SMF接收该签约数据响应消息。
该签约数据响应消息中包含会话管理签约数据，该会话管理签约数据包括指示信息。
作为一种实现方法，该指示信息指示是否允许该终端执行无人驾驶飞行业务。即该指示信息指示允许该终端执行无人驾驶飞行业务，或者指示不允许该终端执行无人驾驶飞行业务。
作为另一种实现方法，该指示信息指示若终端的飞行类型是载人类型，是否允许该终端执行无人驾驶飞行业务。即该指示信息指示若终端的飞行类型是载人类型，允许该终端执行无人驾驶飞行业务，或者指示若终端的飞行类型是载人类型，不允许该终端执行无人驾驶飞行业务。
作为一种实现方法，如果SMF的本地存储有该会话管理签约数据，则上述步骤303和步骤304也可以不需要执行，SMF可以从本地获取该会话管理签约数据。
需要说明的是，作为一种实现方式，若该会话管理签约数据中的指示信息指示“允许该终端执行无人驾驶飞行业务”，仅表示终端可请求无人驾驶飞行业务，并不意味着无人驾驶飞行业务授权成功，需要根据该指示信息向执行无人驾驶飞行业务的实体(如USS)请求授权。这里关于会话管理签约数据中的指示信息的描述同样适用于其他实施例中的签约数据(如会话管理签约数据或移动管理签约数据)中的指示信息。
在一种实现方法中，如果会话管理签约数据中的指示信息指示允许该终端执行无人驾驶飞行业务，则执行以下步骤305至步骤307。如果会话管理签约数据中的指示信息指示不允许该终端执行无人驾驶飞行业务，则执行以下步骤308。
在另一种实现方法中，如果会话管理签约数据中的指示信息指示若终端的飞行类型是载人类型，允许该终端执行无人驾驶飞行业务，且SMF确定该终端的飞行类型是载人类型，则执行以下步骤305至步骤307。如果SMF确定该终端的飞行类型是无人类型，则也执行以下步骤305至步骤307。如果会话管理签约数据中的指示信息指示若终端的飞行类型是载人类型，不允许该终端执行无人驾驶飞行业务，且SMF确定该终端的飞行类型是载人类型，则执行以下步骤308。其中，SMF确定该终端的飞行类型的方法比如可以是：SMF接收来自AMF、USS或终端的指示信息，该指示信息指示该终端的飞行类型，或者SMF从上述步骤304的会话管理签约数据中获取终端的飞行类型。其中，这里描述的SMF确定终端的飞行类型的方法也适用于其他实施例，后面不再赘述。
步骤305，SMF向USS发送授权请求(authorization request)消息。相应的，USS接收该授权请求消息。
如果上述步骤301已经执行，则该授权请求消息用于请求对终端的无人驾驶飞行业务进行授权。
如果上述步骤301没有执行，则该授权请求消息用于请求对终端进行认证授权，以及用于请求对终端的无人驾驶飞行业务进行授权。
步骤306，USS向SMF发送授权响应(authorization response)消息。相应的，SMF接收该授权响应消息。
在一种实现方法中，上述授权请求消息用于请求对终端的无人驾驶飞行业务进行授权，若USS确定对终端的无人驾驶飞行业务进行授权，则该授权响应消息指示授权终端的无人驾驶飞行业务，即授权成功，若USS确定不对终端的无人驾驶飞行业务进行授权，则该授权响应消息指示不授权终端的无人驾驶飞行业务，即授权失败。
在另一种实现方法中，上述授权请求消息用于请求对终端进行认证授权，以及用于请求对终端的无人驾驶飞行业务进行授权，若USS对终端认证授权成功，且确定对终端的无人驾驶飞行业务进行授权，则该授权响应消息指示授权终端的无人驾驶飞行业务，若USS对终端认证授权失败或确定不对终端的无人驾驶飞行业务进行授权，则该授权响应消息指示终端认证授权失败或不授权终端的无人驾驶飞行业务，在这种场景下，若授权响应消息指示终端认证授权失败，也隐含的表示不授权终端的无人驾驶飞行业务。
步骤307，SMF向终端发送PDU会话管理响应消息，相应的，终端接收PDU会话管理响应消息。
如果上述步骤302中的PDU会话管理请求消息是PDU会话建立请求消息，则该PDU会话管理响应消息是PDU会话建立响应消息。如果上述步骤302中的PDU会话管理请求消息是PDU会话修改请求消息，则该PDU会话管理响应消息是PDU会话修改响应消息。
如果上述授权响应消息指示不授权终端的无人驾驶飞行业务，则该PDU会话管理响应消息用于拒绝终端的PDU会话管理请求消息。该PDU会话管理响应消息中可以包含原因值，该原因值是禁止无人驾驶飞行业务。可选的，该PDU会话管理响应消息可以是PDU会话建立拒绝消息或PDU会话修改拒绝消息。
如果上述授权响应消息指示授权终端的无人驾驶飞行业务，则该PDU会话管理响应消息用于接受终端的PDU会话管理请求消息。可选的，该PDU会话管理响应消息可以是PDU会话建立接受消息或PDU会话修改接受消息。
步骤308，SMF向终端发送PDU会话管理响应消息，相应的，终端接收PDU会话管理响应消息。
由于上述步骤304之后，SMF确定不允许该终端执行无人驾驶飞行业务，因此SMF在步骤304之后执行该步骤308，该PDU会话管理响应消息用于拒绝终端的PDU会话管理请求消息。该PDU会话管理响应消息中可以包含原因值，该原因值是禁止无人驾驶飞行业务。可选的，该PDU会话管理响应消息可以是PDU会话建立拒绝消息或PDU会话修改拒绝消息。
根据上述方案，由SMF在会话建立/修改过程中判断接受或拒绝终端请求的无人驾驶飞行业务，可以避免不能执行无人驾驶飞行业务的城市空中交通工具去执行无人驾驶飞行业务，从而提升城市空中交通工具飞行时的安全性。
作为一种实现方法，上述步骤304的指示信息，除了包含前面描述的作用之外，还可以指示该终端是否具有航空能力。如果该指示信息指示该终端没有航空能力，则后续SMF会拒绝该终端执行无人驾驶飞行业务。如果该指示信息指示该终端具有航空能力，则后续SMF根据前面描述的方法，判断拒绝或接受该终端执行无人驾驶飞行业务。
作为另一种实现方法，在上述步骤304的会话管理签约数据中还包含另一个指示信息，该指示信息指示该终端是否具有航空能力。如果该指示信息指示该终端没有航空能力，则后续SMF会拒绝该终端执行无人驾驶飞行业务。如果该指示信息指示该终端具有航空能力，则后续SMF根据前面描述的方法，判断拒绝或接受该终端执行无人驾驶飞行业务。
或者，SMF也可以通过其它方法获知终端是否具有航空能力，比如AMF向SMF发送指示信息，该指示信息指示该终端是否具有航空能力。或者，SMF收到上述步骤302的PDU会话管理请求消息，则认为该终端具有航空能力，这是因为终端实际是先向AMF发送PDU会话管理请求消息，然后AMF向SMF转发该PDU会话管理请求消息，由于AMF 没有拒绝该PDU会话管理请求消息，则表明该终端具有航空能力。当该终端具有航空能力，则SMF根据前面描述的方法，判断拒绝或接受该终端执行无人驾驶飞行业务。
作为一种实现方法，步骤302的PDU会话管理请求消息不是请求建立用于无人驾驶飞行业务的会话，而是用于请求建立第一业务的会话。该情形下，SMF还需要判断该第一业务是否是无人驾驶飞行业务，如果第一业务是无人驾驶飞行业务，则SMF根据前面描述的方法，判断拒绝或接受该终端执行无人驾驶飞行业务。如果第一业务不是无人驾驶飞行业务，则SMF可以按照现有技术的方法，执行后续流程，比如执行建立或修改PDU会话的流程。
作为一种实现方法，上述步骤302的PDU会话管理请求消息用于请求建立用于无人驾驶飞行业务的会话，具体可以是：该PDU会话管理请求消息包括指示信息，该指示信息用于请求建立用于C2通信的会话，或请求将会话修改为用于C2通信，C2通信指的终端与控制器之间的通信，并且本申请实施例中的C2通信对应的业务是一个无人驾驶飞行业务。该情形下，SMF确定该C2通信对应的业务是无人驾驶飞行业务，则确定该PDU会话管理请求消息用于请求建立用于无人驾驶飞行业务的会话。然后，SMF根据前面描述的方法，判断拒绝或接受该终端执行无人驾驶飞行业务。需要说明的是，在实际应用中，C2通信对应的业务可能是无人驾驶飞行业务，也可能不是无人驾驶飞行业务，本申请实施例所讨论的C2通信对应的业务均是无人驾驶飞行业务。
其中，如果上述步骤302的PDU会话管理请求消息包括用于请求建立用于C2通信的会话的指示信息，则上述步骤308的PDU会话管理响应消息携带的原因值可以是禁止无人驾驶飞行业务，或者也可以是禁止C2通信。
参考图4，为本申请实施例提供的一种通信方法。该方法包括以下步骤：
步骤401，终端向AMF发送注册请求消息。相应的，AMF接收该注册请求消息。
可选的，该注册请求消息中包含指示信息，该指示信息指示该终端的飞行类型是无人类型或载人类型。
步骤402，AMF向UDM发送签约数据请求消息。相应的，UDM接收该签约数据请求消息。
签约数据请求消息用于请求终端的移动管理签约数据。
步骤403，UDM向AMF发送签约数据响应消息，相应的，AMF接收该签约数据响应消息。
该签约数据响应消息中包含移动管理签约数据，该移动管理签约数据包括指示信息。
作为一种实现方法，该指示信息指示是否允许该终端执行无人驾驶飞行业务。即该指示信息指示允许该终端执行无人驾驶飞行业务，或者指示不允许该终端执行无人驾驶飞行业务。
作为另一种实现方法，该指示信息指示若终端的飞行类型是载人类型，是否允许该终端执行无人驾驶飞行业务。即该指示信息指示若终端的飞行类型是载人类型，允许该终端执行无人驾驶飞行业务，或者指示若终端的飞行类型是载人类型，不允许该终端执行无人驾驶飞行业务。其中，AMF确定该终端的飞行类型的方法可以参考步骤304中关于SMF确定该终端飞行类型的描述。
作为一种实现方法，如果AMF的本地存储有该移动管理签约数据，则上述步骤402 和步骤403也可以不需要执行，AMF可以从本地获取该移动管理签约数据。
步骤404，AMF向终端发送注册响应消息。相应的，终端接收该注册响应消息。
可选的，注册响应消息可以是注册接受消息。
可选的，如果上述注册请求消息中包含上述指示信息，且该指示信息指示该终端的飞行类型是载人类型，并且上述移动管理签约数据指示该终端的飞行是无人类型，则AMF可以拒绝该终端的注册请求消息，即该注册响应消息是注册拒绝消息，且注册拒绝消息中携带原因值，该原因值为禁止载人类型接入。如果AMF拒绝该终端的注册请求消息，则流程结束。
步骤405，AMF向USS发送认证授权请求消息。相应的，USS接收该认证授权请求消息。
该认证授权请求消息用于请求对终端进行认证授权，即判断终端是否合法。
步骤406，USS向AMF发送认证授权响应消息。相应的，AMF接收该认证授权响应消息。
认证授权响应消息指示终端认证授权成功或认证授权失败。
可选的，该认证授权响应消息中包含终端的飞行类型，该终端的飞行类型是载人类型或无人类型。
上述步骤405和步骤406为可选步骤。
步骤407，终端向AMF发送上行NAS传输消息，该上行NAS传输消息中包含PDU会话管理请求消息。相应的，AMF接收该上行NAS传输消息。
可选的，该上行NAS传输消息中还包含指示信息，该指示信息指示该PDU会话管理请求消息请求建立用于无人驾驶飞行业务的会话。
其中，AMF不会解析PDU会话管理请求消息，而是将PDU会话管理请求消息转发至SMF。
可选的，该上行NAS传输消息中还包含(DNN，S-NSSAI)，则该PDU会话管理请求消息请求建立无人驾驶飞行业务的对应(DNN，S-NSSAI)的会话。
在第一种情形中，如果上述上行NAS传输消息包含指示该PDU会话管理请求消息请求建立用于无人驾驶飞行业务的会话的指示信息，则该指示信息触发AMF判断拒绝或接受该PDU会话管理请求消息。具体的，如果移动管理签约数据中的指示信息指示不允许该终端执行无人驾驶飞行业务，则在步骤407之后执行以下步骤408，且步骤408之后流程结束。或者如果移动管理签约数据中的指示信息指示若终端的飞行类型是载人类型，不允许该终端执行无人驾驶飞行业务，且AMF确定该终端的飞行类型是载人类型，则在步骤407之后执行以下步骤408，且步骤408之后流程结束。
在第二种情形中，如果上述上行NAS传输消息包含指示该PDU会话管理请求消息请求建立用于无人驾驶飞行业务的会话的指示信息，则该指示信息触发AMF判断拒绝或接受该PDU会话管理请求消息。具体的，如果移动管理签约数据中的指示信息指示允许该终端执行无人驾驶飞行业务，或者指示若终端的飞行类型是载人类型允许该终端执行无人驾驶飞行业务且AMF确定该终端的飞行类型是载人类型，或者AMF确定该终端的飞行类型是无人类型，则在步骤407之后执行以下步骤409至步骤412，且步骤412之后流程结束。
在第三种情形中，如果上述上行NAS传输消息不包含指示该PDU会话管理请求消息 请求建立用于无人驾驶飞行业务的会话的指示信息，该情形下，AMF由于不能解析PDU会话管理请求消息，因此AMF不能获知该PDU会话管理请求消息请求建立用于无人驾驶飞行业务的会话，则在步骤407之后执行以下步骤413至步骤416，且步骤416之后流程结束。
步骤408，AMF向终端发送下行NAS传输消息。相应的，终端接收该下行NAS传输消息。
该下行NAS传输消息中包含PDU会话管理请求消息以及原因值，该原因值是禁止无人驾驶飞行业务。
步骤409，AMF向SMF发送PDU会话管理请求消息。相应的，SMF接收该PDU会话管理请求消息。
该PDU会话管理请求消息即为上述步骤407的上行NAS传输消息中的PDU会话管理请求消息。
作为一种实现方式，AMF向SMF发送PDU会话上下文管理请求消息，该PDU会话上下文管理请求消息包含PDU会话管理请求消息。
步骤410a，SMF向USS发送授权请求消息。相应的，USS接收该授权请求消息。
步骤410b，USS向SMF发送授权响应消息。相应的，SMF接收该授权响应消息。
该步骤410a和步骤410b同前述步骤305和步骤306，可参考前述描述。
步骤411，SMF向AMF发送PDU会话管理响应消息。相应的，AMF接收该PDU会话管理响应消息。
作为一种实现方式，SMF向AMF发送PDU会话上下文管理响应消息，该PDU会话上下文管理响应消息包含PDU会话管理响应消息。
SMF通过AMF向终端发送PDU会话管理响应消息。
作为一种实现方法，如果SMF获知USS对终端的无人驾驶飞行业务进行授权，则PDU会话管理响应消息为PDU会话管理接受消息，即向终端发送PDU会话管理接受消息。该情形下，SMF接受PDU会话管理请求消息。
作为一种实现方法，如果SMF获知USS不对终端的无人驾驶飞行业务进行授权，则PDU会话管理响应消息为PDU会话管理拒绝消息，即SMF向终端发送PDU会话管理拒绝消息，该PDU会话管理拒绝消息中包含原因值，该原因值为禁止无人驾驶飞行业务。该情形下，SMF拒绝PDU会话管理请求消息。
步骤412，AMF向终端发送下行NAS传输消息。相应的，终端接收该下行NAS传输消息。
该下行NAS传输消息中包括PDU会话管理响应消息。该PDU会话管理响应消息是PDU会话管理拒绝消息或PDU会话管理接受消息。
步骤413，AMF向SMF发送PDU会话管理请求消息和指示信息。相应的，SMF接收该PDU会话管理请求消息和指示信息。
作为一种实现方式，AMF向SMF发送PDU会话上下文管理请求消息，该PDU会话上下文管理请求消息包含PDU会话管理请求消息和指示信息。
该指示信息的作用与上述步骤403的移动管理签约数据中的指示信息的作用相同。
该PDU会话管理请求消息即为上述步骤407的上行NAS传输消息中的PDU会话管理请求消息。
SMF在接收到PDU会话管理请求消息和指示信息之后，需要根据该指示信息，判断拒绝或接受该PDU会话管理请求消息。具体的，如果该指示信息指示不允许该终端执行无人驾驶飞行业务，或者指示若终端的飞行类型是载人类型不允许该终端执行无人驾驶飞行业务且SMF确定该终端的飞行类型是载人类型，则SMF确定拒绝该PDU会话管理请求消息，且该情形下不需要执行以下步骤414a和步骤414b。如果该指示信息指示允许该终端执行无人驾驶飞行业务，或者指示若终端的飞行类型是载人类型允许该终端执行无人驾驶飞行业务且SMF确定该终端的飞行类型是载人类型，或者SMF确定该终端的飞行类型是无人类型，则SMF需要请求USS对终端的无人驾驶飞行业务进行授权，即执行以下步骤414a和步骤414b，如果USS授权成功，则SMF确定接受PDU会话管理请求消息，如果USS授权失败，则SMF确定拒绝PDU会话管理请求消息。
步骤414a，SMF向USS发送授权请求消息。相应的，USS接收该授权请求消息。
步骤414b，USS向SMF发送授权响应消息。相应的，SMF接收该授权响应消息。
该步骤414a和步骤414b同前述步骤305和步骤306，可参考前述描述。
步骤415，SMF向AMF发送PDU会话管理响应消息。相应的，AMF接收该PDU会话管理响应消息。
作为一种实现方式，SMF向AMF发送PDU会话上下文管理响应消息，该PDU会话上下文管理响应消息包含PDU会话管理响应消息。
如果SMF确定接受PDU会话管理请求消息，该PDU会话管理响应消息可以是该PDU会话管理接受消息。
如果SMF确定拒绝PDU会话管理请求消息，则该PDU会话管理响应消息中可以包含原因值，该原因值为禁止无人驾驶飞行业务。该PDU会话管理响应消息可以是PDU会话管理拒绝消息。
步骤416，AMF向终端发送下行NAS传输消息。相应的，终端接收该下行NAS传输消息。
该下行NAS传输消息中包括PDU会话管理响应消息。
根据上述方案，由AMF在终端注册过程中判断接受或拒绝终端请求的无人驾驶飞行业务，或者由SMF在会话建立/修改过程中判断接受或拒绝终端请求的无人驾驶飞行业务，可以避免不能执行无人驾驶飞行业务的城市空中交通工具去执行无人驾驶飞行业务，从而提升城市空中交通工具飞行时的安全性。
作为一种实现方法，上述步骤403的指示信息，除了包含前面描述的作用之外，还可以指示该终端是否具有航空能力。如果该指示信息指示该终端没有航空能力，则后续AMF或SMF会拒绝该终端执行无人驾驶飞行业务。如果该指示信息指示该终端具有航空能力，则后续AMF或SMF根据前面描述的方法，判断拒绝或接受该终端执行无人驾驶飞行业务。
作为另一种实现方法，在上述步骤403的移动管理签约数据中还包含另一个指示信息，该指示信息指示该终端是否具有航空能力。如果该指示信息指示该终端没有航空能力，则后续AMF或SMF会拒绝该终端执行无人驾驶飞行业务。如果该指示信息指示该终端具有航空能力，则后续AMF或SMF根据前面描述的方法，判断拒绝或接受该终端执行无人驾驶飞行业务。
作为一种实现方法，步骤407的PDU会话管理请求消息不是请求建立用于无人驾驶飞行业务的会话，而是用于请求建立第一业务的会话。该情形下，AMF或SMF还需要判 断该第一业务是否是无人驾驶飞行业务，如果第一业务是无人驾驶飞行业务，则AMF或SMF根据前面描述的方法，判断拒绝或接受该终端执行无人驾驶飞行业务。如果第一业务不是无人驾驶飞行业务，则AMF或SMF可以按照现有技术的方法，执行后续流程，比如执行建立或修改PDU会话的流程。
作为一种实现方法，步骤407的PDU会话管理请求消息用于请求建立用于无人驾驶飞行业务的会话，具体可以是：该PDU会话管理请求消息包括指示信息，该指示信息用于请求建立用于C2通信的会话，或请求将会话修改为用于C2通信，C2通信指的终端与控制器之间的通信，并且本申请实施例中的C2通信对应的业务是一个无人驾驶飞行业务。该情形下，AMF或SMF确定该C2通信对应的业务是无人驾驶飞行业务，则确定该PDU会话管理请求消息用于请求建立用于无人驾驶飞行业务的会话。然后，AMF或SMF根据前面描述的方法，判断拒绝或接受该终端执行无人驾驶飞行业务。需要说明的是，在实际应用中，C2通信对应的业务可能是无人驾驶飞行业务，也可能不是无人驾驶飞行业务，本申请实施例所讨论的C2通信对应的业务均是无人驾驶飞行业务。
其中，如果上述步骤407的PDU会话管理请求消息包括用于请求建立用于C2通信的会话的指示信息，则上述该图4对应的实施例中所描述的原因值可以是禁止无人驾驶飞行业务，或者也可以是禁止C2通信。
参考图5，为本申请实施例提供的一种通信方法。该方法包括以下步骤：
步骤501，终端执行注册流程。
步骤502，AMF向USS发送认证授权请求消息。相应的，USS接收该认证授权请求消息。
该认证授权请求消息用于请求对终端进行认证授权，即判断终端是否合法。
步骤503，USS向AMF发送认证授权响应消息。相应的，AMF接收该认证授权响应消息。
认证授权响应消息指示终端认证授权成功或认证授权失败。
该认证授权响应消息中还包含指示信息。
作为一种实现方法，该指示信息指示是否允许该终端执行无人驾驶飞行业务。即该指示信息指示允许该终端执行无人驾驶飞行业务，或者指示不允许该终端执行无人驾驶飞行业务。
作为另一种实现方法，该指示信息指示若终端的飞行类型是载人类型，是否允许该终端执行无人驾驶飞行业务。即该指示信息指示若终端的飞行类型是载人类型，允许该终端执行无人驾驶飞行业务，或者指示若终端的飞行类型是载人类型，不允许该终端执行无人驾驶飞行业务。
可选的，该认证授权响应消息中还包含终端的飞行类型，该终端的飞行类型是载人类型或无人类型。
步骤504至步骤513，同前述步骤407至步骤416。
需要说明的是，由于在上述步骤502和步骤503中，已经请求USS对终端的合法性进行认证授权，因此在步骤507a至步骤507b，以及步骤511a至步骤511b中，USS不需要再对终端的合法性进行认证授权。
根据上述方案，由AMF在终端注册过程中判断接受或拒绝终端请求的无人驾驶飞行 业务，或者由SMF在会话建立/修改过程中判断接受或拒绝终端请求的无人驾驶飞行业务，可以避免不能执行无人驾驶飞行业务的城市空中交通工具去执行无人驾驶飞行业务，从而提升城市空中交通工具飞行时的安全性。该图5的实施例与上述图4的实施例的主要区别在于：上述图4的实施例是从UDM中获取用于AMF判断是否允许终端的无人驾驶飞行业务的通信的指示信息，图5的实施例是从USS中获取该指示信息。
参考图6，为本申请实施例提供的一种通信方法。该方法包括以下步骤：
步骤601，终端向SMF发送PDU会话建立请求消息。相应的，SMF接收PDU会话建立请求消息。
该PDU会话建立请求消息用于请求建立非无人驾驶飞行业务的会话，或者，该PDU会话建立请求消息用于请求建立无人驾驶飞行业务的会话。
步骤602，SMF向USS发送认证授权请求消息。相应的，USS接收该认证授权请求消息。
该认证授权请求消息用于请求对终端进行认证授权，即判断终端是否合法。
步骤603，USS向SMF发送认证授权响应消息。相应的，SMF接收该认证授权响应消息。
认证授权响应消息指示终端认证授权成功或认证授权失败。
该认证授权响应消息中还包含指示信息。
作为一种实现方法，该指示信息指示是否允许该终端执行无人驾驶飞行业务。即该指示信息指示允许该终端执行无人驾驶飞行业务，或者指示不允许该终端执行无人驾驶飞行业务。
作为另一种实现方法，该指示信息指示若终端的飞行类型是载人类型，是否允许该终端执行无人驾驶飞行业务。即该指示信息指示若终端的飞行类型是载人类型，允许该终端执行无人驾驶飞行业务，或者指示若终端的飞行类型是载人类型，不允许该终端执行无人驾驶飞行业务。
可选的，该认证授权响应消息中还包含终端的飞行类型，该终端的飞行类型是载人类型或无人类型。
步骤604，SMF向终端发送PDU会话建立响应消息，相应的，终端接收该PDU会话建立响应消息。
如果上述步骤601的PDU会话建立请求消息请求建立无人驾驶飞行业务的会话，则不需要执行以下步骤605至步骤607。若SMF接受该PDU会话建立请求消息，则该PDU会话建立响应消息指示会话建立成功或指示接受PDU会话建立请求消息。若SMF拒绝该PDU会话建立请求消息，则该PDU会话建立响应消息中可以包含原因值，该原因值是禁止无人驾驶飞行业务，该PDU会话建立响应消息指示会话建立失败或指示拒绝PDU会话建立请求消息。其中，SMF判断拒绝或接受该PDU会话建立请求消息的方法，可以参考前述图5的实施例的描述。
如果上述步骤601的PDU会话建立请求消息用于请求建立非无人驾驶飞行业务的会话，则该PDU会话建立响应消息指示会话建立成功，且在步骤604之后还执行以下步骤605至步骤607。
步骤605，终端向SMF发送PDU会话管理请求消息。相应的，SMF接收PDU会话 管理请求消息。
SMF在接收到PDU会话管理请求消息和上述步骤603的指示信息之后，需要根据该指示信息，判断拒绝或接受该PDU会话管理请求消息。具体的，如果该指示信息指示不允许该终端执行无人驾驶飞行业务，或者指示若终端的飞行类型是载人类型不允许该终端执行无人驾驶飞行业务且SMF确定该终端的飞行类型是载人类型，则SMF确定拒绝该PDU会话管理请求消息，且该情形下不需要执行步骤606a和步骤606b。如果该指示信息指示允许该终端执行无人驾驶飞行业务，或者指示若终端的飞行类型是载人类型允许该终端执行无人驾驶飞行业务且SMF确定该终端的飞行类型是载人类型，或者SMF确定该终端的飞行类型是无人类型，则SMF需要请求USS对终端的无人驾驶飞行业务进行授权，如果USS授权成功，则SMF确定接受PDU会话管理请求消息，如果USS授权失败，则SMF确定拒绝PDU会话管理请求消息。
步骤606a，SMF向USS发送授权请求消息。相应的，USS接收该授权请求消息。
步骤606b，USS向SMF发送授权响应消息。相应的，SMF接收该授权响应消息。
该步骤606a和步骤606b同前述步骤305和步骤306，可参考前述描述。
步骤607，SMF向终端发送PDU会话管理响应消息，相应的，终端接收该PDU会话管理响应消息。
如果SMF确定接受PDU会话管理请求消息，该PDU会话管理响应消息可以是该PDU会话管理接受消息。
如果SMF确定拒绝PDU会话管理请求消息，则该PDU会话管理响应消息中可以包含原因值，该原因值为禁止无人驾驶飞行业务。该PDU会话管理响应消息可以是PDU会话管理拒绝消息。
根据上述方案，由SMF在会话建立/修改过程中判断接受或拒绝终端请求的无人驾驶飞行业务，可以避免不能执行无人驾驶飞行业务的城市空中交通工具去执行无人驾驶飞行业务，从而提升城市空中交通工具飞行时的安全性。该图6的实施例与上述图3的实施例的主要区别在于：上述图3的实施例是从UDM中获取用于SMF判断是否允许终端的无人驾驶飞行业务的指示信息，图6的实施例是从USS中获取用于SMF判断是否允许终端的无人驾驶飞行业务的指示信息。
作为一种实现方法，上述步骤603的指示信息，除了包含前面描述的作用之外，还可以指示该终端是否具有航空能力。如果该指示信息指示该终端没有航空能力，则后续SMF会拒绝该终端执行无人驾驶飞行业务。如果该指示信息指示该终端具有航空能力，则后续SMF根据前面描述的方法，判断拒绝或接受该终端执行无人驾驶飞行业务。
作为另一种实现方法，在上述步骤603的认证授权响应消息中还包含另一个指示信息，该指示信息指示该终端是否具有航空能力。如果该指示信息指示该终端没有航空能力，则后续SMF会拒绝该终端执行无人驾驶飞行业务。如果该指示信息指示该终端具有航空能力，则后续SMF根据前面描述的方法，判断拒绝或接受该终端执行无人驾驶飞行业务。
或者，SMF也可以通过其它方法获知终端是否具有航空能力，比如AMF向SMF发送指示信息，该指示信息指示该终端是否具有航空能力。或者，SMF收到上述步骤601的PDU会话建立请求消息，则认为该终端具有航空能力，这是因为终端实际是先向AMF发送PDU会话建立请求消息，然后AMF向SMF转发该PDU会话建立请求消息，由于AMF没有拒绝该PDU会话建立请求消息，则表明该终端具有航空能力。当该终端具有航空能 力，则SMF根据前面描述的方法，判断拒绝或接受该终端执行无人驾驶飞行业务。
作为一种实现方法，步骤605的PDU会话管理请求消息不是请求建立用于无人驾驶飞行业务的会话，而是用于请求建立第一业务的会话。该情形下，SMF还需要判断该第一业务是否是无人驾驶飞行业务，如果第一业务是无人驾驶飞行业务，则SMF根据前面描述的方法，判断拒绝或接受该终端执行无人驾驶飞行业务。如果第一业务不是无人驾驶飞行业务，则SMF可以按照现有技术的方法，执行后续流程，比如执行建立或修改PDU会话的流程。
作为一种实现方法，上述步骤605的PDU会话管理请求消息用于请求建立用于无人驾驶飞行业务的会话具体可以是：该PDU会话管理请求消息包括指示信息，该指示信息用于请求建立用于C2通信的会话，或请求将会话修改为用于C2通信，C2通信指的终端与控制器之间的通信，并且本申请实施例中的C2通信对应的业务是一个无人驾驶飞行业务。该情形下，SMF确定该C2通信对应的业务是无人驾驶飞行业务，则确定该PDU会话管理请求消息用于请求建立用于无人驾驶飞行业务的会话。然后，SMF根据前面描述的方法，判断拒绝或接受该终端执行无人驾驶飞行业务。需要说明的是，在实际应用中，C2通信对应的业务可能是无人驾驶飞行业务，也可能不是无人驾驶飞行业务，本申请实施例所讨论的C2通信对应的业务均是无人驾驶飞行业务。
其中，如果上述步骤605的PDU会话管理请求消息包括用于请求建立用于C2通信的会话的指示信息，则该图6对应的实施例中所描述的原因值可以是禁止无人驾驶飞行业务，或者也可以是禁止C2通信。
可以理解的是，为了实现上述实施例中功能，AMF和SMF包括了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本申请中所公开的实施例描述的各示例的单元及方法步骤，本申请能够以硬件或硬件和计算机软件相结合的形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用场景和设计约束条件。
图7和图8为本申请的实施例提供的可能的通信装置的结构示意图。这些通信装置可以用于实现上述方法实施例中AMF或SMF的功能，因此也能实现上述方法实施例所具备的有益效果。在本申请的实施例中，该通信装置可以是AMF或SMF，也可以是应用于AMF或SMF的模块(如芯片)。
如图7所示，通信装置700包括处理单元710和收发单元720。通信装置700用于实现上述方法实施例中AMF或SMF的功能。
在第一个实施例中，该通信装置用于实现上述AMF或SMF的功能：收发单元720，用于接收来自终端的非接入层NAS消息，该终端是城市空中交通工具；处理单元710，用于根据该终端的签约信息，通过收发单元720向该终端发送拒绝或接受该NAS消息的响应消息，该签约信息指示是否允许该终端执行无人驾驶飞行业务。
作为一种可能的实现方法，收发单元720，还用于向签约数据管理网元请求该终端的签约信息；以及接收来自该签约数据管理网元的该签约信息。
作为一种可能的实现方法，该拒绝该NAS消息的响应消息包括原因值，该原因值为禁止无人驾驶飞行业务。
作为一种可能的实现方法，处理单元710，还用于根据该签约信息，确定拒绝或接受 该NAS消息。
作为一种可能的实现方法，处理单元710，具体用于若该签约信息指示不允许该终端执行无人驾驶飞行业务，确定拒绝该NAS消息。
作为一种可能的实现方法，处理单元710，具体用于若该签约信息指示允许该终端执行无人驾驶飞行业务，通过收发单元720向认证授权服务器发送授权请求消息，该授权请求消息请求对该终端的无人驾驶飞行业务进行授权；通过收发单元720接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权失败；根据该授权响应消息，确定拒绝该NAS消息。
作为一种可能的实现方法，处理单元710，具体用于若该签约信息指示允许该终端执行无人驾驶飞行业务，通过收发单元720向认证授权服务器发送授权请求消息，该授权请求消息请求对该终端的无人驾驶飞行业务进行授权；通过收发单元720接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权成功；根据该授权响应消息，确定接受该NAS消息。
作为一种可能的实现方法，该签约信息指示是否允许该终端执行无人驾驶飞行业务，包括：该签约信息指示若该终端的飞行类型为载人类型，是否允许该终端执行无人驾驶飞行业务。
作为一种可能的实现方法，处理单元710，具体用于若该签约信息指示若该终端的飞行类型为载人类型，不允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，确定拒绝该NAS消息。
作为一种可能的实现方法，处理单元710，具体用于若该签约信息指示若该终端的飞行类型为载人类型，允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，通过收发单元720向认证授权服务器发送授权请求消息，该授权请求消息请求对该终端的无人驾驶飞行业务进行授权；通过收发单元720接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权失败；根据该授权响应消息，确定拒绝该NAS消息。
作为一种可能的实现方法，处理单元710，具体用于若该签约信息指示若该终端的飞行类型为载人类型，允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，通过收发单元720向认证授权服务器发送授权请求消息，该授权请求消息请求对该终端的无人驾驶飞行业务进行授权；通过收发单元720接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权成功；根据该授权响应消息，确定接受该NAS消息。
作为一种可能的实现方法，该NAS消息为会话管理请求消息，该会话管理请求消息请求建立用于无人驾驶飞行业务的会话。
在第二个实施例中，该通信装置用于实现上述SMF的功能：收发单元720，用于接收会话管理请求消息和指示信息，该会话管理请求消息请求建立用于无人驾驶飞行业务的会话，该指示信息指示是否允许终端执行无人驾驶飞行业务，该终端是城市空中交通工具；处理单元710，用于根据该指示信息，通过收发单元720向该终端发送拒绝或接受该会话管理请求消息的响应消息。
作为一种可能的实现方法，该拒绝该会话管理请求消息的响应消息包括原因值，该原因值为禁止无人驾驶飞行业务。
作为一种可能的实现方法，处理单元710，还用于根据该指示信息，确定拒绝或接受 该会话管理请求消息。
作为一种可能的实现方法，处理单元710，具体用于若该指示信息指示不允许该终端执行无人驾驶飞行业务，确定拒绝该会话管理请求消息。
作为一种可能的实现方法，处理单元710，具体用于若该指示信息指示允许该终端执行无人驾驶飞行业务，通过收发单元720向认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；通过收发单元720接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权失败；根据该授权响应消息，确定拒绝该会话管理请求消息。
作为一种可能的实现方法，处理单元710，具体用于若该指示信息指示允许该终端执行无人驾驶飞行业务，通过收发单元720向认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；通过收发单元720接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权成功；根据该授权响应消息，确定接受该会话管理请求消息。
作为一种可能的实现方法，该指示信息指示是否允许该终端执行无人驾驶飞行业务，包括：该指示信息指示若该终端的飞行类型为载人类型，是否允许该终端执行无人驾驶飞行业务。
作为一种可能的实现方法，处理单元710，具体用于若该指示信息指示若该终端的飞行类型为载人类型，不允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，确定拒绝该会话管理请求消息。
作为一种可能的实现方法，处理单元710，具体用于若该指示信息指示若该终端的飞行类型为载人类型，允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，通过收发单元720向认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；通过收发单元720接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权失败；根据该授权响应消息，确定拒绝该会话管理请求消息。
作为一种可能的实现方法，处理单元710，具体用于若该指示信息指示若该终端的飞行类型为载人类型，允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，通过收发单元720向认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；通过收发单元720接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权成功；根据该授权响应消息，确定接受该会话管理请求消息。
作为一种可能的实现方法，收发单元720，具体用于接收来自移动性管理网元的该会话管理请求消息和该指示信息。
在第三个实施例中，该通信装置用于实现上述AMF或SMF的功能：收发单元720，用于向认证授权服务器发送认证授权请求消息，该认证授权请求消息用于请求对终端进行认证授权，该终端是城市空中交通工具；接收来自该认证授权服务器的认证授权响应消息，该认证授权响应消息包括指示信息，该指示信息指示是否允许该终端执行无人驾驶飞行业务；接收来自该终端的非接入层NAS消息；处理单元710，用于根据该指示信息，通过收发单元720向该终端发送拒绝或接受该NAS消息的响应消息。
作为一种可能的实现方法，该拒绝该NAS消息的响应消息包括原因值，该原因值为禁止无人驾驶飞行业务。
作为一种可能的实现方法，处理单元710，具体用于根据该指示信息，确定拒绝或接受该NAS消息。
作为一种可能的实现方法，处理单元710，具体用于若该指示信息指示不允许该终端执行无人驾驶飞行业务，确定拒绝该NAS消息。
作为一种可能的实现方法，处理单元710，具体用于若该指示信息指示允许该终端执行无人驾驶飞行业务，通过收发单元720向该认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；通过收发单元720接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权失败；根据该授权响应消息，确定拒绝该NAS消息。
作为一种可能的实现方法，处理单元710，具体用于若该指示信息指示允许该终端执行无人驾驶飞行业务，通过收发单元720向该认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；通过收发单元720接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权成功；根据该授权响应消息，确定接受该NAS消息。
作为一种可能的实现方法，该指示信息指示是否允许该终端执行无人驾驶飞行业务，包括：该指示信息指示若该终端的飞行类型为载人类型，是否允许该终端执行无人驾驶飞行业务。
作为一种可能的实现方法，处理单元710，具体用于若该指示信息指示若该终端的飞行类型为载人类型，不允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，确定拒绝该NAS消息。
作为一种可能的实现方法，处理单元710，具体用于若该指示信息指示若该终端的飞行类型为载人类型，允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，通过收发单元720向该认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；通过收发单元720接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权失败；根据该授权响应消息，确定拒绝该NAS消息。
作为一种可能的实现方法，处理单元710，具体用于若该指示信息指示若该终端的飞行类型为载人类型，允许该终端执行无人驾驶飞行业务，且该终端的飞行类型为载人类型，通过收发单元720向该认证授权服务器发送授权请求消息，该授权请求消息用于请求对该终端的无人驾驶飞行业务进行授权；通过收发单元720接收来自该认证授权服务器的授权响应消息，该授权响应消息指示授权成功；根据该授权响应消息，确定接受该NAS消息。
作为一种可能的实现方法，该NAS消息为会话管理请求消息，该会话管理请求消息请求建立用于无人驾驶飞行业务的会话。
有关上述处理单元710和收发单元720更详细的描述可以直接参考上述方法实施例中相关描述直接得到，这里不加赘述。
如图8所示，通信装置800包括处理器810和接口电路820。处理器810和接口电路820之间相互耦合。可以理解的是，接口电路820可以为收发器或输入输出接口。可选的，通信装置800还可以包括存储器830，用于存储处理器810执行的指令或存储处理器810 运行指令所需要的输入数据或存储处理器810运行指令后产生的数据。
当通信装置800用于实现上述方法实施例时，处理器810用于实现上述处理单元710的功能，接口电路820用于实现上述收发单元720的功能。
可以理解的是，本申请的实施例中的处理器可以是中央处理单元(central processing unit，CPU)，还可以是其它通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。通用处理器可以是微处理器，也可以是任何常规的处理器。
本申请的实施例中的方法步骤可以通过硬件的方式来实现，也可以由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器、闪存、只读存储器、可编程只读存储器、可擦除可编程只读存储器、电可擦除可编程只读存储器、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于基站或终端中。当然，处理器和存储介质也可以作为分立组件存在于基站或终端中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机程序或指令。在计算机上加载和执行所述计算机程序或指令时，全部或部分地执行本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、基站、用户设备或者其它可编程装置。所述计算机程序或指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机程序或指令可以从一个网站站点、计算机、服务器或数据中心通过有线或无线方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是集成一个或多个可用介质的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，例如，软盘、硬盘、磁带；也可以是光介质，例如，数字视频光盘；还可以是半导体介质，例如，固态硬盘。该计算机可读存储介质可以是易失性或非易失性存储介质，或可包括易失性和非易失性两种类型的存储介质。
在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。在本申请的文字描述中，字符“/”，一般表示前后关联对象是一种“或”的关系；在本申请的公式中，字符“/”，表示前后关联对象是一种“相除”的关系。
可以理解的是，在本申请的实施例中涉及的各种数字编号仅为描述方便进行的区分，并不用来限制本申请的实施例的范围。上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定。

Claims (39)

  1. 一种通信方法，其特征在于，包括：
    接收来自终端的非接入层NAS消息，所述终端是城市空中交通工具；
    根据所述终端的签约信息，向所述终端发送拒绝或接受所述NAS消息的响应消息，所述签约信息指示是否允许所述终端执行无人驾驶飞行业务。
  2. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    向签约数据管理网元请求所述终端的签约信息；
    接收来自所述签约数据管理网元的所述签约信息。
  3. 如权利要求1或2所述的方法，其特征在于，所述拒绝所述NAS消息的响应消息包括原因值，所述原因值为禁止无人驾驶飞行业务。
  4. 如权利要求1至3中任一项所述的方法，其特征在于，所述方法还包括：
    根据所述签约信息，确定拒绝或接受所述NAS消息。
  5. 如权利要求4所述的方法，其特征在于，所述根据所述签约信息，确定拒绝所述NAS消息，包括：
    若所述签约信息指示不允许所述终端执行无人驾驶飞行业务，确定拒绝所述NAS消息。
  6. 如权利要求4所述的方法，其特征在于，所述根据所述签约信息，确定拒绝所述NAS消息，包括：
    若所述签约信息指示允许所述终端执行无人驾驶飞行业务，向认证授权服务器发送授权请求消息，所述授权请求消息请求对所述终端的无人驾驶飞行业务进行授权；
    接收来自所述认证授权服务器的授权响应消息，所述授权响应消息指示授权失败；
    根据所述授权响应消息，确定拒绝所述NAS消息。
  7. 如权利要求4所述的方法，其特征在于，所述根据所述签约信息，确定接受所述NAS消息，包括：
    若所述签约信息指示允许所述终端执行无人驾驶飞行业务，向认证授权服务器发送授权请求消息，所述授权请求消息请求对所述终端的无人驾驶飞行业务进行授权；
    接收来自所述认证授权服务器的授权响应消息，所述授权响应消息指示授权成功；
    根据所述授权响应消息，确定接受所述NAS消息。
  8. 如权利要求4所述的方法，其特征在于，所述签约信息指示是否允许所述终端执行无人驾驶飞行业务，包括：
    所述签约信息指示若所述终端的飞行类型为载人类型，是否允许所述终端执行无人驾驶飞行业务。
  9. 如权利要求8所述的方法，其特征在于，所述根据所述签约信息，确定拒绝所述NAS消息，包括：
    若所述签约信息指示若所述终端的飞行类型为载人类型，不允许所述终端执行无人驾驶飞行业务，且所述终端的飞行类型为载人类型，确定拒绝所述NAS消息。
  10. 如权利要求8所述的方法，其特征在于，所述根据所述签约信息，确定拒绝所述NAS消息，包括：
    若所述签约信息指示若所述终端的飞行类型为载人类型，允许所述终端执行无人驾驶飞行业务，且所述终端的飞行类型为载人类型，向认证授权服务器发送授权请求消息，所述授权请求消息请求对所述终端的无人驾驶飞行业务进行授权；
    接收来自所述认证授权服务器的授权响应消息，所述授权响应消息指示授权失败；
    根据所述授权响应消息，确定拒绝所述NAS消息。
  11. 如权利要求8所述的方法，其特征在于，所述根据所述签约信息，确定接受所述NAS消息，包括：
    若所述签约信息指示若所述终端的飞行类型为载人类型，允许所述终端执行无人驾驶飞行业务，且所述终端的飞行类型为载人类型，向认证授权服务器发送授权请求消息，所述授权请求消息请求对所述终端的无人驾驶飞行业务进行授权；
    接收来自所述认证授权服务器的授权响应消息，所述授权响应消息指示授权成功；
    根据所述授权响应消息，确定接受所述NAS消息。
  12. 如权利要求1至11中任一项所述的方法，其特征在于，所述NAS消息为会话管理请求消息，所述会话管理请求消息请求建立用于无人驾驶飞行业务的会话。
  13. 一种通信方法，其特征在于，包括：
    接收会话管理请求消息和指示信息，所述会话管理请求消息请求建立用于无人驾驶飞行业务的会话，所述指示信息指示是否允许终端执行无人驾驶飞行业务，所述终端是城市空中交通工具；
    根据所述指示信息，向所述终端发送拒绝或接受所述会话管理请求消息的响应消息。
  14. 如权利要求13所述的方法，其特征在于，所述拒绝所述会话管理请求消息的响应消息包括原因值，所述原因值为禁止无人驾驶飞行业务。
  15. 如权利要求13或14所述的方法，其特征在于，所述方法还包括：
    根据所述指示信息，确定拒绝或接受所述会话管理请求消息。
  16. 如权利要求15所述的方法，其特征在于，所述根据所述指示信息，确定拒绝所述会话管理请求消息，包括：
    若所述指示信息指示不允许所述终端执行无人驾驶飞行业务，确定拒绝所述会话管理请求消息。
  17. 如权利要求15所述的方法，其特征在于，所述根据所述指示信息，确定拒绝所述会话管理请求消息，包括：
    若所述指示信息指示允许所述终端执行无人驾驶飞行业务，向认证授权服务器发送授权请求消息，所述授权请求消息用于请求对所述终端的无人驾驶飞行业务进行授权；
    接收来自所述认证授权服务器的授权响应消息，所述授权响应消息指示授权失败；
    根据所述授权响应消息，确定拒绝所述会话管理请求消息。
  18. 如权利要求15所述的方法，其特征在于，所述根据所述指示信息，确定接受所述会话管理请求消息，包括：
    若所述指示信息指示允许所述终端执行无人驾驶飞行业务，向认证授权服务器发送授权请求消息，所述授权请求消息用于请求对所述终端的无人驾驶飞行业务进行授权；
    接收来自所述认证授权服务器的授权响应消息，所述授权响应消息指示授权成功；
    根据所述授权响应消息，确定接受所述会话管理请求消息。
  19. 如权利要求15所述的方法，其特征在于，所述指示信息指示是否允许所述终端执 行无人驾驶飞行业务，包括：
    所述指示信息指示若所述终端的飞行类型为载人类型，是否允许所述终端执行无人驾驶飞行业务。
  20. 如权利要求19所述的方法，其特征在于，所述根据所述指示信息，确定拒绝所述会话管理请求消息，包括：
    若所述指示信息指示若所述终端的飞行类型为载人类型，不允许所述终端执行无人驾驶飞行业务，且所述终端的飞行类型为载人类型，确定拒绝所述会话管理请求消息。
  21. 如权利要求19所述的方法，其特征在于，所述根据所述指示信息，确定拒绝所述会话管理请求消息，包括：
    若所述指示信息指示若所述终端的飞行类型为载人类型，允许所述终端执行无人驾驶飞行业务，且所述终端的飞行类型为载人类型，向认证授权服务器发送授权请求消息，所述授权请求消息用于请求对所述终端的无人驾驶飞行业务进行授权；
    接收来自所述认证授权服务器的授权响应消息，所述授权响应消息指示授权失败；
    根据所述授权响应消息，确定拒绝所述会话管理请求消息。
  22. 如权利要求19所述的方法，其特征在于，所述根据所述指示信息，确定接受所述会话管理请求消息，包括：
    若所述指示信息指示若所述终端的飞行类型为载人类型，允许所述终端执行无人驾驶飞行业务，且所述终端的飞行类型为载人类型，向认证授权服务器发送授权请求消息，所述授权请求消息用于请求对所述终端的无人驾驶飞行业务进行授权；
    接收来自所述认证授权服务器的授权响应消息，所述授权响应消息指示授权成功；
    根据所述授权响应消息，确定接受所述会话管理请求消息。
  23. 如权利要求13至22中任一项所述的方法，其特征在于，所述接收会话管理请求消息和指示信息，包括：
    接收来自移动性管理网元的所述会话管理请求消息和所述指示信息。
  24. 一种通信方法，其特征在于，包括：
    向认证授权服务器发送认证授权请求消息，所述认证授权请求消息用于请求对终端进行认证授权，所述终端是城市空中交通工具；
    接收来自所述认证授权服务器的认证授权响应消息，所述认证授权响应消息包括指示信息，所述指示信息指示是否允许所述终端执行无人驾驶飞行业务；
    接收来自所述终端的非接入层NAS消息；
    根据所述指示信息，向所述终端发送拒绝或接受所述NAS消息的响应消息。
  25. 如权利要求24所述的方法，其特征在于，所述拒绝所述NAS消息的响应消息包括原因值，所述原因值为禁止无人驾驶飞行业务。
  26. 如权利要求24或25所述的方法，其特征在于，所述方法还包括：
    根据所述指示信息，确定拒绝或接受所述NAS消息。
  27. 如权利要求26所述的方法，其特征在于，所述根据所述指示信息，确定拒绝所述NAS消息，包括：
    若所述指示信息指示不允许所述终端执行无人驾驶飞行业务，确定拒绝所述NAS消息。
  28. 如权利要求26所述的方法，其特征在于，所述根据所述指示信息，确定拒绝所述 NAS消息，包括：
    若所述指示信息指示允许所述终端执行无人驾驶飞行业务，向所述认证授权服务器发送授权请求消息，所述授权请求消息用于请求对所述终端的无人驾驶飞行业务进行授权；
    接收来自所述认证授权服务器的授权响应消息，所述授权响应消息指示授权失败；
    根据所述授权响应消息，确定拒绝所述NAS消息。
  29. 如权利要求26所述的方法，其特征在于，所述根据所述指示信息，确定接受所述NAS消息，包括：
    若所述指示信息指示允许所述终端执行无人驾驶飞行业务，向所述认证授权服务器发送授权请求消息，所述授权请求消息用于请求对所述终端的无人驾驶飞行业务进行授权；
    接收来自所述认证授权服务器的授权响应消息，所述授权响应消息指示授权成功；
    根据所述授权响应消息，确定接受所述NAS消息。
  30. 如权利要求26所述的方法，其特征在于，所述指示信息指示是否允许所述终端执行无人驾驶飞行业务，包括：
    所述指示信息指示若所述终端的飞行类型为载人类型，是否允许所述终端执行无人驾驶飞行业务。
  31. 如权利要求30所述的方法，其特征在于，所述根据所述指示信息，确定拒绝所述NAS消息，包括：
    若所述指示信息指示若所述终端的飞行类型为载人类型，不允许所述终端执行无人驾驶飞行业务，且所述终端的飞行类型为载人类型，确定拒绝所述NAS消息。
  32. 如权利要求30所述的方法，其特征在于，所述根据所述指示信息，确定拒绝所述NAS消息，包括：
    若所述指示信息指示若所述终端的飞行类型为载人类型，允许所述终端执行无人驾驶飞行业务，且所述终端的飞行类型为载人类型，向所述认证授权服务器发送授权请求消息，所述授权请求消息用于请求对所述终端的无人驾驶飞行业务进行授权；
    接收来自所述认证授权服务器的授权响应消息，所述授权响应消息指示授权失败；
    根据所述授权响应消息，确定拒绝所述NAS消息。
  33. 如权利要求30所述的方法，其特征在于，所述根据所述指示信息，确定接受所述NAS消息，包括：
    若所述指示信息指示若所述终端的飞行类型为载人类型，允许所述终端执行无人驾驶飞行业务，且所述终端的飞行类型为载人类型，向所述认证授权服务器发送授权请求消息，所述授权请求消息用于请求对所述终端的无人驾驶飞行业务进行授权；
    接收来自所述认证授权服务器的授权响应消息，所述授权响应消息指示授权成功；
    根据所述授权响应消息，确定接受所述NAS消息。
  34. 如权利要求24至33中任一项所述的方法，其特征在于，所述NAS消息为会话管理请求消息，所述会话管理请求消息请求建立用于无人驾驶飞行业务的会话。
  35. 一种通信装置，其特征在于，包括用于执行如权利要求1至12中任一项所述方法的模块，或用于执行如权利要求13至23中任一项所述方法的模块，或用于执行如权利要求24至34中任一项所述方法的模块。
  36. 一种通信装置，其特征在于，包括处理器和接口电路，所述接口电路用于接收来自所述通信装置之外的其它通信装置的信号并传输至所述处理器或将来自所述处理器的 信号发送给所述通信装置之外的其它通信装置，所述处理器通过逻辑电路或执行代码指令用于实现如权利要求1至12中任一项所述的方法，或用于实现如权利要求13至23中任一项所述的方法，或用于实现如权利要求24至34中任一项所述的方法。
  37. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得所述装置执行如权利要求1至12中任一项所述的通信方法，或执行如权利要求13至23中任一项所述的通信方法，或执行如权利要求24至34中任一项所述的通信方法。
  38. 一种计算机程序产品，其特征在于，包括计算机程序，当所述计算机程序被通信装置执行时，实现如权利要求1至34中任一项所述的方法。
  39. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序或指令，当所述计算机程序或指令被通信装置执行时，实现如权利要求1至34中任一项所述的方法。
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