Abstract: A service packet transmission method and apparatus, the method including receiving, by the source mobile edge computing network element, after a source mobile edge computing network element receives a second uplink service packet, a first uplink service packet sent by a source user plane network element and that is from a target user plane network element, where the second uplink service packet is the last uplink service packet sent by the source mobile edge computing network element to a source application server, sending, by the source mobile edge computing network element, the first uplink service packet to a target mobile edge computing network element, and sending, by the source mobile edge computing network element, first indication information to the target mobile edge computing network element, the first indication information indicating that the sending of the first uplink service packet by the source mobile edge computing network element ends.

Abstract: This application provides a method for controlling disorder of downlink data and an apparatus thereof. The method includes: A control plane network element determines to switch from a first user plane device to a second user plane device, and sends indication information to the second user plane device. The second user plane device buffers, according to the received indication information, downlink data received from a session anchor, and sends the buffered downlink data after reception of an end marker from the first user plane device.

Abstract: A communication method and apparatus are provided. A session management function network element receives first information from an edge application server discovery function network element, where the first information comprises internet protocol (IP) address information of N edge application servers (EASs), and N is an integer greater than or equal to 2. The session management function network element determines an EAS IP address information set based on the IP address information of the N EASs, where the EAS IP address information set comprises IP address information of M EASs, the IP address information of the M EASs corresponds to a same data network access identifier (DNAI), and M is an integer less than or equal to N. The session management function network element sends the EAS IP address information set to the edge application server discovery function network element.

Abstract: The present disclosure provides a communication method and apparatus. The method may include: A terminal device receives a first timer from a network device that indicates a first duration after which the terminal device initiates periodic connection establishment to the network device. The first duration is greater than or equal to a duration of the terminal device in a non-coverage area of a satellite. The terminal device activates the first timer when the terminal device determines that the terminal device leaves a coverage area of the satellite.

Abstract: Embodiments of this application provide a communication method and a communication apparatus. The method includes: A network device sends first information to a terminal device, where the first information indicates at least one second network, the second network is a network in which local traffic routing is allowed by a first public network, the network device is a device of the first public network, and the first network is a home network of the terminal device; the terminal device performs network switching; and the terminal device determines, based on the first information and networks before and after the switching, an application server having an optimal path. In embodiments of this application, the application server is determined based on whether the first information includes the network after the switching, thereby improving communication quality after the network switching and reducing communication latency.

Abstract: A communications method and apparatus, where the method includes: sending, by a session management network element, first indication information when the session management network element determines, based on first information, to establish a first low-latency service flow for a session, wherein the first indication information is used to indicate to set the session to an always-on session. According to solutions of this application, when determining to establish the low-latency service flow, the session management network element flexibly indicates to a terminal apparatus to set the session to the always-on session. This avoids a resource waste caused by setting the session to the always-on session all the time, and avoids a transmission latency caused when the session is not set to the always-on session in time, such that resource utilization and transmission efficiency are improved.

Abstract: A communications method in a roaming scenario and an apparatus are provided. The method includes: obtaining, by a new V-SMF from an old V-SMF, first service information corresponding to first DNAI which is a DNAI corresponding to the location before UE's movement; sending, by the new V-SMF, the first service information to an H-SMF; receiving, by the new V-SMF, a first message comprising the first service information from the H-SMF; and after receiving the first message, sending, by the new V-SMF based on the first message, a session modification command to the UE, wherein the session modification command comprises the first service information and an EAS re-discovery indication, so that the UE re-queries the EAS.

Abstract: The present disclosure relates to quality of service (QoS) information notification methods, devices, and systems. In one example method, a user plane network element obtains a first QoS notification, where the first QoS notification includes first QoS information used to indicate QoS of a target service. The user plane network element sends first indication information to an application network element to which a QoS notification needs to be reported, where the first indication information is used to indicate a second QoS notification, the second QoS notification includes second QoS information of the target service, and the first QoS notification is the same as the second QoS notification, or the second QoS notification is determined based on the first QoS notification.

Abstract: A packet transmission method, including receiving, by a session management function network element, first access network tunnel information and second access network tunnel information that correspond to a first service, and sending a downlink forwarding rule to a user plane function network element, where the downlink forwarding rule includes the first access network tunnel information and the second access network tunnel information, and the downlink forwarding rule indicates the user plane function network element to replicate a received downlink packet of the first service, and send downlink packets of the first service through two paths respectively corresponding to the first access network tunnel information and the second access network tunnel information.

Abstract: This application provides a satellite communication method and an apparatus. The method may include: A session management network element obtains an identifier list. The identifier list includes identification information of one or more terminal devices that access a satellite in a satellite backhaul manner. The session management network element configures a forwarding rule for a user plane network element on the satellite. The forwarding rule is used to offload, to an access network device corresponding to the terminal device, a data packet whose destination address is included in an address of the terminal device corresponding to the identifier list. Based on the foregoing solution, a terminal device that supports local switching in the satellite can perform communication through local switching in the satellite, so that a delay can be reduced and user experience can be improved.

Abstract: This application provides a satellite communication method and apparatus. The method may include: A session management network element obtains first service information, where the service information indicates one or more services supported by a satellite. The session management network element determines, based on the first service information, whether a terminal device is allowed to access the services supported by the satellite. When determining that the terminal device is allowed to access at least one of the services supported by the satellite, the session management network element inserts a user plane network element on the satellite into a user plane path of the terminal device. According to the foregoing solutions, a delay in satellite communication of the terminal device can be reduced, and user experience can be improved.

Abstract: A communication method includes determining, by a policy control function network element, that a category of a backhaul network of a terminal device is a satellite backhaul category. The communication method also includes determining, by the policy control function network element, policy information of the terminal device based on the satellite backhaul category and service deployment information. The service deployment information includes information about a service deployed on a satellite, the policy information includes a correspondence between the service deployed on the satellite and a first-type routing policy, and the first-type routing policy is used for determining a user plane function network element on the satellite as a session anchor of the terminal device. The communication method further includes sending, by the policy control function network element, the policy information to the terminal device.

Abstract: Example network-based adaptive streaming media parameter adjustment methods and apparatuses are disclosed. One example method includes receiving, by an access network device, media QoS information from a session management network element, where the media QoS information includes at least two bit rate indicators and QoS requirement information corresponding to each of the bit rate indicators. The access network device determines, based on a current network condition and the media QoS information, a target bit rate indicator from the at least two bit rate indicators. The target bit rate indicator is sent to a terminal or a video server, where the current network condition meets a network requirement for transmitting streaming media data at a bit rate indicated by the target bit rate indicator.

Abstract: This application provides a network connection configuration method and an apparatus. The method is as follows: After a terminal device obtains network configuration information of an application in the terminal device, the terminal device sends the network configuration information to a core network control plane network element, so that the core network control plane network element may determine a network connection that is of the application and is between the terminal device and the data network and that meets the network configuration information.

Abstract: A communication method and apparatus. One method includes: a session management network element obtains an identifier of a DN accessed by a terminal device and/or an identifier of a network slice accessed by the terminal device. The session management network element determines, based on the identifier of the DN and/or the identifier of the network slice, a service type requested by the terminal device. The session management network element requests, from an access network device on a satellite, tunnel information corresponding to the service type. The session management network element receives, from the access network device, the tunnel information corresponding to the service type.

Abstract: This application provides a communication method and apparatus. The method includes: An EASDF receives an identifier of a target service from a first terminal; the EASDF obtains an address of a same target application server that needs to be accessed by a plurality of terminals including the first terminal to access the target service; and the EASDF sends the address of the target application server to the first terminal. Hence, the EASDF obtains, for a same target service, identifiers (referred to as a UE list) of a plurality of UEs that need to access a same EAS. After UE (for example, UE #1) in the UE list performs an EAS discovery procedure for the target service, the EASDF obtains an address of the target EAS, and sends, to another UE in the list, an address of the target EAS that is the same as an address of the UE #1.

Abstract: This application provides a method for requesting an application function, an apparatus, and a system. The method includes: An enabler server determines, based on first determining information, whether to perform traffic influence in advance. When determining to perform traffic influence in advance, the enabler server sends an application function request message in advance, where the application function request message is for requesting to perform traffic influence for one or more application servers.

Abstract: A method includes obtaining, by a data analytics device, data of a terminal on an access device and data of the terminal on an access and mobility management function device, where the data of the terminal on the access device includes a first identifier, and the access device is an access device, the data of the terminal on the access and mobility management function device includes the first identifier, and the first identifier includes an identifier assigned by the access device to the terminal, associating, by the data analytics device, the data of the terminal on the access device with the data of the terminal on the access and mobility management function device based on the first identifier.

Abstract: Embodiments of this disclosure provide a positioning method, an apparatus, and a system, so that a network side obtains accurate geographical location information of a terminal device in time in a satellite communication scenario. The method includes: After determining that a trigger condition occurs, an access network device sends first location information of a terminal device to a core network device, where the first location information includes a first tracking area identity TAI, and the first TAI is an identifier of a tracking area in which the terminal device is currently located.

Abstract: This application provides a communication method and apparatus. The method may include: A first session management network element determines an offloading point in a visited network based on first information, where the first information indicates that offloading is allowed in the visited network, and the first session management network element is a network element deployed in the visited network; and the first session management network element sends an offloading rule to the offloading point, where the offloading rule is for offloading a packet to the visited network. According to this application, after accessing the visited network through HR roaming, a terminal device may access a service in the visited network by using the offloading point determined by the first session management network element, to implement local offloading in the visited network.