Session processing method, equipment and core network function during handover

Abstract

The present application discloses a method, apparatus, device and core network function for session processing during a switching process, which belongs to the field of communications. The method for session processing during a switching process includes: sending a switching indication and a first non-access layer NAS information to a network side device, wherein the first NAS information is used to activate or establish a protocol data unit PDU session. By adopting an embodiment of the present application, by sending a NAS information for establishing or activating a PDU session to a network side device while issuing a switching indication of an access network device for switching access, a PDU session can be established or activated at the same time during the switching process, thereby improving the switching efficiency without affecting data transmission.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a session processing method, terminal equipment, access network equipment and core network functions during a switching process. Background Art

[0002] Multicast service is a service that transmits data from one source to multiple destinations, such as Multimedia Broadcast Multicast Service (MBMS). Through multicast service, the same data content only needs to be transmitted once to reach multiple users, thus saving network resources.

[0003] At present, when a user equipment (UE, also called a terminal device) receives multicast service data, access network equipment switching occurs. When an independent transmission mode is required to transmit data at a target location, a protocol data unit (PDU) session can only be established before switching the access network equipment, which affects the switching efficiency. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a session processing method, apparatus, device and core network function during a switching process, so as to solve the problem of low switching efficiency.

[0005] In a first aspect, a session processing method in a switching process is provided, which is applied to a terminal device, and the method includes:

[0006] A switching indication and first non-access layer NAS information are sent to a network side device, where the first NAS information is used to activate or establish a protocol data unit PDU session.

[0007] In a second aspect, a session processing device in a switching process is provided, the device comprising:

[0008] The sending module is used to send a switching indication and first non-access layer NAS information to a network side device, where the first NAS information is used to activate or establish a protocol data unit PDU session.

[0009] In a third aspect, a session processing method in a handover process is provided, which is applied to a core network function, and the method includes:

[0010] Obtain a switching indication and first non-access layer NAS information, where the first NAS information is used to activate or establish a protocol data unit PDU session; send the switching indication to the first access network device to which the terminal device is currently connected, or send a switching request to the second access network device.

[0011] In a fourth aspect, a session processing device in a switching process is provided, the device comprising:

[0012] An acquisition module is used to obtain a switching indication and a first non-access layer NAS information, wherein the first NAS information is used to activate or establish a protocol data unit PDU session; a sending module is used to send the switching indication to a first access network device to which the terminal device is currently connected, or to send a switching request to a second access network device.

[0013] In a fifth aspect, a session processing method in a switching process is provided, which is applied to a first access network device, and the method includes:

[0014] Receive a switching indication and a first non-access layer NAS information from a terminal device, and send the first non-access layer NAS information to a core network function or a second access network device; or, according to the switching indication received from the core network function, initiate a switching operation to the core network function or the second access network device, wherein the switching indication is obtained by the core network function based on the received first NAS information or a first NAS container, and the first NAS container is generated based on the switching indication and the first NAS information; wherein the first NAS information is used to activate or establish a protocol data unit PDU session.

[0015] In a sixth aspect, a session processing device in a switching process is provided, the device comprising:

[0016] A transmission module, used to receive a switching indication and a first non-access layer NAS information from a terminal device, and send the first non-access layer NAS information to a core network function or a second access network device; a processing module, used to initiate a switching operation to the core network function or the second access network device according to the switching indication received from the core network function, wherein the switching indication is obtained by the core network function based on the received first NAS information or a first NAS container, and the first NAS container is generated based on the switching indication and the first NAS information; wherein the first NAS information is used to activate or establish a protocol data unit PDU session.

[0017] In a seventh aspect, a session processing method in a switching process is provided, which is applied to a second access network device, and the method includes:

[0018] Update the air interface resource information according to the received session service parameters or multicast service parameters, and send the air interface resource information to the first access network device, the session service parameters or the multicast service parameters are determined by the core network function based on the received first non-access layer NAS information; and / or receive second NAS information from the core network function or the first access network device, and send the second NAS information to the first access network device, the second NAS information is used to respond to the first NAS information; wherein the first NAS information is used to activate or establish a protocol data unit PDU session.

[0019] In an eighth aspect, a session processing device in a switching process is provided, the device comprising: a transmission module, configured to perform at least one of the following operations:

[0020] Update air interface resource information according to the received session service parameters or multicast service parameters, and send the air interface resource information to the first access network device, the session service parameters or the multicast service parameters are determined by the core network function based on the received first non-access layer NAS information; receive second NAS information from the core network function or the first access network device, and send the second NAS information to the first access network device, the second NAS information is used to respond to the first NAS information; wherein the first NAS information is used to activate or establish a protocol data unit PDU session.

[0021] In the ninth aspect, a terminal device is provided, comprising: a memory, a processor, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect.

[0022] In the tenth aspect, a network side device is provided, comprising: a memory, a processor, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the third aspect, the fifth aspect, or the seventh aspect.

[0023] In the eleventh aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect, the third aspect, the fifth aspect or the seventh aspect are implemented.

[0024] In the twelfth aspect, a computer program product is provided, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect, the third aspect, the fifth aspect or the seventh aspect.

[0025] In the thirteenth aspect, a chip is provided, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run terminal device or network side device programs or instructions to implement the steps of the method described in the first aspect, the third aspect, the fifth aspect or the seventh aspect.

[0026] In the embodiment of the present application, by sending NAS information for establishing or activating a PDU session to the network side device while issuing a switching indication of the access network device for switching access, a PDU session can be established or activated at the same time during the switching process. In this way, the switching efficiency can be improved without affecting data transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0028] Figure 1 A block diagram showing a wireless communication system to which the embodiments of the present application can be applied;

[0029] Figure 2 It is a flow chart of a session processing method in a switching process in an embodiment of the present application;

[0030] Figure 3 It is a flowchart of another session processing method in a switching process in an embodiment of the present application;

[0031] Figure 4 It is a flowchart of a session processing method in a switching process in another embodiment of the present application;

[0032] Figure 5 It is a flowchart of another method for processing a session in a switching process in an embodiment of the present application;

[0033] Figure 6 It is a schematic diagram of a process of switching access network equipment and establishing or activating a PDU session in an embodiment of the present application;

[0034] Figure 7 This is another schematic diagram of the process of switching access network equipment and establishing or activating a PDU session in an embodiment of the present application;

[0035] Figure 8 This is a schematic diagram of another process of switching access network equipment and establishing or activating a PDU session in an embodiment of the present application;

[0036] Fig. 9 It is another schematic diagram of the process of switching access network equipment and establishing or activating a PDU session in an embodiment of the present application;

[0037] Fig.10 It is another schematic diagram of the process of switching access network equipment and establishing or activating a PDU session in an embodiment of the present application;

[0038] Fig.11 It is another schematic diagram of the process of switching access network equipment and establishing or activating a PDU session in an embodiment of the present application;

[0039] Fig.12 It is another schematic diagram of the process of switching access network equipment and establishing or activating a PDU session in an embodiment of the present application;

[0040] Fig.13 It is a structural diagram of a session processing device in a switching process in an embodiment of the present application;

[0041] Fig.14 It is a structural diagram of another session processing device in a switching process in an embodiment of the present application;

[0042] Fig.15 It is a structural diagram of a session processing device in a switching process in another embodiment of the present application;

[0043] Fig.16 It is a structural diagram of another session processing device in a switching process in an embodiment of the present application;

[0044] Fig.17 It is a structural diagram of a communication device in an embodiment of the present application;

[0045] Fig.18 It is a schematic diagram of the structure of a terminal device in an embodiment of the present application;

[0046] Fig.19 It is a structural diagram of a network side device in an embodiment of the present application. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0049] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. However, the following description describes a New Radio (NR) system for illustrative purposes, and the NR terminology is used in most of the following descriptions, although these technologies can also be applied to applications other than NR system applications, such as the 6th generation (6 th Generation, 6G) communication system.

[0050] Figure 1A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can also be called a terminal device or a user terminal (User Equipment, UE), and the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), a wearable device (Wearable Device) or a vehicle-mounted device (Vehicle UE, VUE), a pedestrian terminal (Pedestrian UE, PUE) and other terminal side devices, and the wearable device includes: a bracelet, a headset, glasses, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 can be a base station or a core network, wherein the base station can be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a B node, an evolved B node (eNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting and receiving point (Transmitting Receiving Point, TRP) or some other suitable term in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

[0051] The following describes in detail the session processing method in the switching process provided by the embodiment of the present application through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0052] See also Figure 2 As shown, an embodiment of the present application provides a session processing method in a switching process, which is executed by a terminal device, and the method includes the following process steps:

[0053] Step 201: Send a switching indication and first Non-Access-Stratum (NAS) information to a network side device, where the first NAS information is used to activate or establish a protocol data unit (PDU) session.

[0054] In the embodiment of the present application, by sending NAS information for establishing or activating a PDU session to a network side device while issuing a switching indication of an access network device for switching access, a PDU session can be established or activated at the same time during the switching process. In this way, the switching efficiency is improved without affecting data transmission.

[0055] Optionally, the switching indication is used to instruct the terminal device to switch from the currently connected first access network device to the second access network device. The network side device may include a core network function and the first access network device. And the switching indication includes at least one of the following: measurement report, candidate cell information, message type information and indication information.

[0056] The message type information is specifically the type information of the message carrying the first NAS information. The terminal device switches through at least one implicit indication of the measurement report, candidate cell information and message type information, and switches through the explicit indication of the indication information.

[0057] Optionally, the session processing method in the switching process of the embodiment of the present application may further include the following contents:

[0058] A first non-access stratum NAS container is sent to the network side device, where the first NAS container is generated based on the switching indication and the first NAS information. It can be understood that the switching indication and the first NAS information can be sent to the network side device together through a NAS container, that is, the switching indication and the NAS container containing the first NAS information are not sent independently, that is, they are sent in a bundle.

[0059] Optionally, the session processing method in the switching process of the embodiment of the present application may also include the following content: sending multicast service identification information to the network side device.

[0060] Further optionally, the session processing method in the switching process of the embodiment of the present application may also include the following contents:

[0061] A first non-access layer NAS container is sent to the network side device, where the first NAS container is generated based on at least two of the following: the switching indication; the first NAS information; and the multicast service identification information. That is, at this time, at least two of the switching indication, the first NAS information, and the multicast service identification information can be sent to the network side device together through the NAS container.

[0062] Optionally, when only the first NAS information and the multicast service identification information are sent to the network side device through the NAS container, at this time, the switching indication and the NAS container containing the first NAS information and the multicast service identification information are sent independently.

[0063] Optionally, the session processing method in the switching process of the embodiment of the present application may further include the following contents:

[0064] Receive multicast service data indicated by the multicast service identification information sent by the network side device through the PDU session.

[0065] It can be understood that in this embodiment, the transmission of multicast data is implemented through a channel applicable only to the terminal device, rather than through a channel shared by multiple terminal devices.

[0066] Optionally, the session processing method in the switching process of the embodiment of the present application may further include the following contents:

[0067] Receive second NAS information sent by the network side device; wherein the second NAS information is used to respond to the first NAS information.

[0068] Further optionally, the second NAS information may also be included in a corresponding second NAS container for transmission. Further optionally, the second NAS information or the second NAS container may be sent together with a switching command sent by a network side device to instruct the terminal device to switch from the currently connected first access network device to the second access network device, for example, the second NAS information or the second NAS container is carried by the switching command.

[0069] See also Figure 3 As shown, an embodiment of the present application provides a session processing method in a switching process, which is performed by a core network function, wherein the core network function includes one or more of an access and mobility management function (Access and Mobility Management Function, AMF), a session management function (Session Management Function, SMF) and a user plane function (UserPlane Function, UPF). Specifically, the method includes the following process steps:

[0070] Step 301: Obtain a switching indication and first non-access layer NAS information, where the first NAS information is used to activate or establish a protocol data unit PDU session.

[0071] Step 303: Send the switching indication to the first access network device to which the terminal device is currently connected, or send a switching request to the second access network device.

[0072] In the embodiment of the present application, after receiving the switching indication and the first non-access layer NAS information, the core network function can forward the switching indication to the first access network device currently accessed by the terminal device, or send a responsive switching request to the second non-access network device to which the terminal device is to be switched, and receive NAS information for establishing or activating a PDU session while implementing the forwarding of the switching indication or issuing the switching request. In this way, a PDU session can be established or activated simultaneously during the switching process to improve the switching efficiency without affecting data transmission.

[0073] Optionally, the session processing method in the switching process of the embodiment of the present application may further include the following contents:

[0074] Reserve core network session resources corresponding to the PDU session; and send the core network session resources to the second access network device.

[0075] Optionally, the core network session resources may be used for the second access network device to reserve corresponding wireless session resources, where the wireless session resources include air interface resources and downlink receiving tunnel resources corresponding to the core network session resources.

[0076] Optionally, the session processing method in the switching process of the embodiment of the present application may further include the following contents:

[0077] Sending a session service parameter or a multicast service parameter to the first access network device or the second access network device; wherein the session service parameter or the multicast service parameter is used by the first access network device to update air interface resource information; or, the session service parameter or the multicast service parameter is used by the second access network device to update air interface resource information.

[0078] Optionally, in the session processing method during the switching process of an embodiment of the present application, the above-mentioned multicast service parameters or the session service parameters are associated with the PDU session.

[0079] Further optionally, the above-mentioned session service parameters include at least one of the following: PDU session identification information; flow identification information; quality of service (Quality of Service, QoS) parameter information.

[0080] Further optionally, the above-mentioned multicast service parameters include at least one of the following: multicast service identification information; multicast service flow identification information; QoS parameter information.

[0081] Optionally, in the session processing method during the handover process of the embodiment of the present application, the handover indication and the first NAS information are obtained through the received first non-access layer NAS container.

[0082] Optionally, the session processing method in the switching process of the embodiment of the present application may also include the following content: obtaining multicast service identification information.

[0083] Further optionally, at least two of the following are acquired through the received first non-access layer NAS container: the switching indication; the first NAS information; and the multicast service identification information.

[0084] Optionally, in the session processing method during the switching process of the embodiment of the present application, the above-mentioned switching indication includes at least one of the following: measurement report, candidate cell information, message type information and indication information.

[0085] Optionally, in the session processing method in the handover process of the embodiment of the present application, the obtaining of the handover indication in the above step 301 may be performed as the following different specific contents:

[0086] In one example, the switching indication sent by the terminal device is received.

[0087] In another example, the switching indication sent by the first access network device or the second access network device is received.

[0088] Optionally, the session processing method in the switching process of the embodiment of the present application may further include the following contents:

[0089] Send second NAS information to the first access network device or the second access network device, where the second NAS information is used to respond to the first NAS information.

[0090] Optionally, in the session processing method during the switching process of the embodiment of the present application, a second NAS container may be first generated based on the second NAS information, and the second NAS container may be sent to the first access network device or the second access network device.

[0091] Optionally, the session processing method in the switching process of the embodiment of the present application may further include the following contents:

[0092] Sending multicast service data to the terminal device, wherein the multicast service data is associated with the PDU session. That is, the multicast data service can be sent to the terminal device through the PDU session, and the multicast data service can be indicated by the multicast service identification information.

[0093] See also Figure 4 As shown, an embodiment of the present application provides a session processing method in a switching process, which is executed by a first access network device, and the first access network device is a source access network device to which a terminal device initially accesses. The method includes the following process steps:

[0094] Step 401: Receive a switching indication and first non-access layer NAS information from a terminal device, and send the first non-access layer NAS information to a core network function or a second access network device; or, according to a switching indication received from the core network function, initiate a switching operation to the core network function or the second access network device, wherein the switching indication is obtained by the core network function based on the received first NAS information or a first NAS container, and the first NAS container is generated based on the switching indication and the first NAS information; wherein the first NAS information is used to activate or establish a protocol data unit PDU session.

[0095] In an embodiment of the present application, the first access network device to which the terminal device is currently connected can forward the switching instruction issued by the terminal device to the core network function, or initiate a switching operation based on the switching instruction issued by the terminal device forwarded by the core network function, and forward the NAS information used to establish or activate the PDU session to the core network function while implementing the forwarding of the switching instruction or initiating the switching operation. In this way, the PDU session can be established or activated at the same time during the switching process to improve the switching efficiency without affecting data transmission.

[0096] Optionally, in the session processing method during the switching process of the embodiment of the present application, the above-mentioned switching indication includes at least one of the following: measurement report, candidate cell information, message type information and indication information.

[0097] Optionally, in the session processing method in the handover process of the embodiment of the present application, after receiving the handover indication from the terminal device or the core network function, the method may further include the following contents:

[0098] Receive a session service parameter or a multicast service parameter sent by the core network function; update air interface resource information according to the session service parameter or the multicast service parameter; and send the updated air interface resource information to the second access network device.

[0099] The specific composition of the session service parameters and the multicast service parameters can be found in the corresponding description in the core network function side, which will not be repeated here.

[0100] Optionally, the session processing method in the switching process of the embodiment of the present application may further include the following contents:

[0101] Receive second NAS information sent by the core network function or the second access network device, wherein the second NAS information is used to respond to the first NAS information; and send the second NAS information to the terminal device.

[0102] See also Figure 5As shown, an embodiment of the present application provides a session processing method in a switching process, which is executed by a second access network device, and the second access network device is a target access network device accessed after the terminal device switches, and the method includes the following process steps:

[0103] Step 501: Update air interface resource information according to the received session service parameters or multicast service parameters, and send the air interface resource information to the first access network device, the session service parameters or the multicast service parameters are determined by the core network function based on the received first non-access layer NAS information; and / or receive second NAS information from the core network function or the first access network device, and send the second NAS information to the first access network device, the second NAS information is used to respond to the first NAS information; wherein the first NAS information is used to activate or establish a protocol data unit PDU session.

[0104] In an embodiment of the present application, the second access network device to which the terminal device is to be switched can provide air interface resource information for the first access network device to which the terminal device is currently connected according to the session service parameters or multicast service parameters provided by the core network function, and / or receive the second NAS information sent by the core network function or the first access network device in response to the first NAS information, so as to establish or activate the PDU session at the same time during the switching process, thereby improving the switching efficiency without affecting the data transmission. The session service parameters or multicast service parameters are determined by the core network function based on the first NAS information provided by the terminal device for activating or establishing the protocol data unit PDU session.

[0105] Optionally, the session processing method in the switching process of the embodiment of the present application may further include the following contents:

[0106] Receive the first NAS information, and send the first NAS information to the core network function.

[0107] Optionally, the first NAS information may be carried in a session update request and sent to the core network function. Further optionally, the session service parameter or multicast service parameter may be carried in a session update response sent by the core network function and corresponding to the session update request.

[0108] Combine the following Figures 6 to 12 The schematic diagram of multi-party interaction shown describes in detail the process of switching access network devices and establishing or activating PDU sessions in an embodiment of the present application, specifically taking the core network function as one or more of AMF, SMF and UPF, and the access network device as a base station as an example, wherein the source gNB corresponds to the above-mentioned first access network device, and the target gNB corresponds to the above-mentioned second access network device.

[0109] See also Figure 6 As shown, the embodiment of the present application provides a process of switching access network equipment and establishing or activating a PDU session, including but not limited to the following process steps:

[0110] S601: The terminal UE sends a message to the source base station source gNB, such as a measurement report, carrying NAS container1, where the NAS container1 contains a NAS message for activating or establishing a PDU session, such as a Service Request or PDU Session Establishment Request message. The NAS container1 may carry multicast service identification information, and the measurement report message may also carry a measurement report or candidate cell information. The terminal may decide whether to carry the NAS container1 based on network configuration or pre-configuration.

[0111] S602: The Source gNB decides to perform a handover operation, selects a target gNB (based on measurement reports or candidate cell information, or autonomously), and sends a handover notification message to the core network, such as a HandoverRequired message, carrying NAS container1. The Source gNB may decide not to carry NAS container1, for example, based on the information of the target gNB (whether the target gNB is a non-enhanced gNB).

[0112] S603: The core network function CN NF parses NAS container1 and reserves core network session resources, such as notifying UPF to reserve an uplink tunnel. The core network function can decide whether to reserve core network session resources, that is, whether to use a tunnel dedicated to the terminal to send multicast data at the target base station. The core network can decide how to reserve session resources based on the recorded multicast services that the terminal is participating in.

[0113] S604: The CN NF sends a handover request to the target gNB, such as a Handover Request message, which may carry core network session resource information obtained based on the PDU session information or multicast service identification information in NAS container1, or multicast service parameters (such as multicast service identification, and / or multicast service QoS information) obtained based on the multicast service identification information in NAS container1.

[0114] S605: The target base station reserves session resources, including air interface resources and downlink receiving tunnel resources corresponding to the core network session resource information in S304.

[0115] S606: The target base station returns a handover response to the CN NF, such as a Handover Response message, which may carry the wireless session resources obtained in S605.

[0116] S607: The CN NF receives the wireless session resources and uses the downlink receiving tunnel resource information in the wireless session resources to update the core network session resources, such as notifying the UPF of the downlink receiving tunnel resource information.

[0117] S608: After S606, the CN NF sends a handover command to the source base station, such as a Handover Command message, which carries the air interface resource information in the received wireless session resources and may also carry NAS container2, which contains a response to the NAS message in NAS container1, such as a Service Accept message or a PDUSession Establishment message.

[0118] S609: The source base station sends a handover command to the user terminal UE, carrying the received air interface resource information, and may carry NAS container2.

[0119] S610: The UE accesses the target base station according to the received air interface resource information, and sends a handover completion message, such as a Handover Confirm message, to the target base station.

[0120] S611: The target base station sends a session update message to the CN NF.

[0121] S612: The core network sends multicast data to the UE through the tunnel corresponding to the session resource information (not a channel shared by multiple terminals, but a channel used only for the UE).

[0122] In another embodiment, S606 does not include the downlink receiving tunnel information, but S611 includes the downlink receiving tunnel information, so that S607 is executed after S611.

[0123] In another embodiment, the core network function carries NAS container2 in S604, and the target gNB forwards NAS container2 to the core network function in S606. The core network function then sends NAScontainer2 in S608. The purpose of this is to encrypt and secure NAS container2 through the target gNB.

[0124] Optionally, in this embodiment, the core network sends multicast data through a shared channel with the source base station, and the source base station distributes the multicast data to the terminal in a broadcast manner or a point-to-point manner.

[0125] See also Figure 7 As shown, the embodiment of the present application provides another process of switching access network equipment and establishing or activating a PDU session, including but not limited to the following process steps:

[0126] S701: The terminal UE sends a message to the source base station source gNB, such as a measurement report, carrying NAS container1, where the NAS container1 contains a NAS message for activating or establishing a PDU session, such as a Service Request or PDU Session Establishment Request message. The NAS container1 may carry multicast service identification information, and the measurement report message may also carry a measurement report or candidate cell information. The terminal may decide whether to carry the NAS container1 based on network configuration or pre-configuration.

[0127] S702: The Source gNB decides to perform a handover operation, selects a target gNB (based on measurement reports or candidate cell information, or autonomously), and sends a handover request message, such as a HandoverRequest message, to the target gNB, carrying NAS container 1. The Source gNB may decide not to carry NAS container 1, for example, based on the information of the target gNB (whether the target gNB is a non-enhanced gNB).

[0128] S703: The target gNB sends a session update to the core network function CN NF, carrying NAS container1.

[0129] S704: The core network function CN NF parses NAS container1 and reserves core network session resources, such as notifying UPF to reserve an uplink tunnel. The core network function can decide whether to reserve core network session resources, that is, whether to use a tunnel dedicated to the terminal to send multicast data at the target base station. The core network can decide how to reserve session resources based on the recorded multicast services that the terminal is participating in.

[0130] S705: The CN NF sends a session update response to the target gNB, which may carry the core network session resource information obtained based on the PDU session information or multicast service identification information in NAS container1, or carry the multicast service parameters (such as multicast service identification and / or multicast service QoS information) obtained based on the multicast service identification information in NAScontainer1, and may also carry NAS container2, which includes the response to the NAS message in NAS container1, such as Service Accept message or PDU Session Establishment message.

[0131] S706: The target base station reserves session resources, including air interface resources corresponding to the core network session resource information in S705, and may include downlink receiving tunnel resources corresponding to the core network session resource information.

[0132] S707: The target base station returns a handover response to the source base station, such as returning a Handover Response message, which carries air interface resource information and may carry NAS container2.

[0133] S708: The source base station sends a handover command to the user terminal UE, carrying the received air interface resource information and may carry NAS container2.

[0134] S709: The UE accesses the target base station according to the received air interface resource information, and sends a handover completion message, such as a Handover Confirm message, to the target base station.

[0135] S710: The target base station sends a session update message to the CN NF, carrying the downlink receiving tunnel resource information in S706, or reserves the downlink receiving tunnel resources at this time and carries the downlink receiving tunnel resource information in the message sent to the CN NF.

[0136] S711: CN NF receives the downlink receiving tunnel resource information and updates the core network session resources, for example, notifying UPF of the downlink receiving tunnel resource information.

[0137] S712: The core network sends multicast data to the UE through the tunnel corresponding to the session resource information (not a channel shared by multiple terminals, but a channel used only for the UE).

[0138] Optionally, in this embodiment, the core network sends multicast data through a shared channel with the source base station, and the source base station distributes the multicast data to the terminal in a broadcast manner or a point-to-point manner.

[0139] See also Figure 8As shown, the embodiment of the present application provides another process of switching access network equipment and establishing or activating a PDU session, including but not limited to the following process steps:

[0140] S801: The terminal UE sends a message to the source base station source gNB, such as a measurement report, carrying NAS container1, where the NAS container1 contains a NAS message for activating or establishing a PDU session, such as a Service Request or PDU Session Establishment Request message. The NAS container1 may carry multicast service identification information, and the measurement report message may also carry a measurement report or candidate cell information. The terminal may decide whether to carry the NAS container1 based on network configuration or pre-configuration.

[0141] S802: Source gNB sends a session update request to the core network function, carrying NAS container 1. The source base station may decide not to perform this step, for example, based on the information of the target base station (whether the target base station is a non-enhanced base station).

[0142] S803: The core network function CN NF parses NAS container1, and may carry the PDU session information or multicast service identification information in NAS container1 to obtain session service parameters, such as session identification (PDU Session ID), service flow identification (QFI), service quality identification (5QI) and other information, or carry the multicast service parameters (such as multicast service identification, and / or multicast service QoS information) obtained based on the multicast service identification information in NAS container1, and return a session update response to the source base station, carrying the session service parameters or multicast service parameters.

[0143] S804: The core network function CN NF reserves core network session resources, such as notifying the UPF to reserve an uplink tunnel. The core network function can decide whether to reserve core network session resources, that is, decide whether to use a tunnel dedicated to the terminal to send multicast data in the target base station. This step can be performed before S803.

[0144] S805: The Source gNB updates the air interface resource information according to the session service parameters after step 3, so that the air interface resource information includes the air interface resource information corresponding to the session service parameters in step 3.

[0145] S806: Source gNB decides to perform a handover operation, selects a target gNB (based on measurement reports or candidate cell information, or autonomously), and sends a handover notification message, such as a HandoverRequired message, to the core network.

[0146] S807: The CN NF sends a handover request to the target gNB, such as a Handover Request message.

[0147] S808: The target base station reserves session resources.

[0148] S809: The target base station returns a handover response to the CN NF, such as a Handover Response message.

[0149] S810: The CN NF sends a handover command to the source base station, such as a Handover Command message, which carries the air interface resource information in the received wireless session resources and may also carry NAS container2, where NAS container2 includes a response to the NAS message in NAScontainer1, such as a Service Accept message or a PDU Session Establishment message.

[0150] S811: The source base station sends a handover command to the user terminal UE, carrying the received air interface resource information and may carry NAS container2.

[0151] S812: The UE accesses the target base station according to the received air interface resource information, and sends a handover completion message, such as a Handover Confirm message, to the target base station.

[0152] S813: The target base station sends a session update message to the CN NF.

[0153] S814: CN NF updates core network session resources, such as notifying UPF of downlink receiving tunnel resource information.

[0154] S815: The core network sends multicast data to the UE through the tunnel corresponding to the session resource information (not a channel shared by multiple terminals, but a channel used only for the UE).

[0155] In another embodiment, the core network function carries NAS container2 in S807, and the target gNB forwards NAS container2 to the core network function in S809. The core network function then sends NAScontainer2 in S810. The purpose of this is to encrypt and secure NAS container2 through the target gNB.

[0156] Optionally, in this embodiment, the core network sends multicast data through a shared channel with the source base station, and the source base station distributes the multicast data to the terminal in a broadcast manner or a point-to-point manner.

[0157] See also Fig. 9 As shown, the embodiment of the present application provides another process of switching access network equipment and establishing or activating a PDU session, including but not limited to the following process steps:

[0158] S901: The terminal UE sends a message to the source base station source gNB, such as a measurement report, carrying NAS container1, where the NAS container1 contains a NAS message for activating or establishing a PDU session, such as a Service Request or PDU Session Establishment Request message. The NAS container1 may carry multicast service identification information, and the measurement report message may also carry a measurement report or candidate cell information. The terminal may decide whether to carry the NAS container1 based on network configuration or pre-configuration.

[0159] S902: Source gNB sends a session update request to the core network function, carrying NAS container 1. The source base station may decide not to perform this step, for example, based on the information of the target base station (whether the target base station is a non-enhanced base station).

[0160] S903: The core network function CN NF parses NAS container1, which may carry session service parameters obtained based on the PDU session information or multicast service identification information in NAS container1, such as session identification (PDU Session ID), service flow identification (QoS Flow Identifier, QFI), service quality identification (5G QoS Identifier, 5QI) and other information, or carry multicast service parameters obtained based on the multicast service identification information in NAS container1 (such as multicast service identification, and / or multicast service QoS information), and return a session update response to the source base station, carrying session service parameters or multicast service parameters, and may also carry NAS container2, which includes a response to a NAS message in NAS container1, such as a Service Accept message or a PDU Session Establishment message.

[0161] S904: The core network function CN NF reserves core network session resources, such as notifying the UPF to reserve an uplink tunnel. The core network function can decide whether to reserve core network session resources, that is, decide whether to use a tunnel dedicated to the terminal to send multicast data in the target base station. This step can be performed before S903.

[0162] S905: The Source gNB updates the air interface resource information according to the session service parameters after S903, so that the air interface resource information includes the air interface resource information corresponding to the session service parameters in S903.

[0163] S906: Source gNB decides to perform a handover operation, selects a target gNB (based on measurement reports or candidate cell information, or autonomously), and sends a handover request message to the target gNB, such as a HandoverReqest message, which may carry NAS container2.

[0164] S907: The target base station reserves session resources.

[0165] S908: The target base station returns a handover response to the source base station, such as returning a Handover Response message, which carries air interface resource information and may carry NAS container2.

[0166] S909: The source base station sends a handover command to the user terminal UE, carrying the received air interface resource information and may carry NAS container2.

[0167] S910: The UE accesses the target base station according to the received air interface resource information, and sends a handover completion message, such as a Handover Confirm message, to the target base station.

[0168] S911: The target base station sends a session update message to the CN NF.

[0169] S912: CN NF updates core network session resources, such as notifying UPF of downlink receiving tunnel resource information.

[0170] S913: The core network sends multicast data to the UE through the tunnel corresponding to the session resource information (not a channel shared by multiple terminals, but a channel used only for the UE).

[0171] In another embodiment, NAS container2 is not carried in S906 and S908, that is, it is not forwarded through the target gNB, but is directly forwarded by the source gNB to the UE.

[0172] Optionally, in this embodiment, the core network sends multicast data through a shared channel with the source base station, and the source base station distributes the multicast data to the terminal in a broadcast manner or a point-to-point manner.

[0173] See also Fig.10 As shown, the embodiment of the present application provides another process of switching access network equipment and establishing or activating a PDU session, including but not limited to the following process steps:

[0174] S1001: The terminal UE sends a message to the source base station source gNB, such as a measurement report, carrying NAS container1, where the NAS container1 contains a NAS message for activating or establishing a PDU session, such as a Service Request or PDU Session Establishment Request message. The NAS container1 may carry multicast service identification information, and the measurement report message may also carry a measurement report or candidate cell information. The terminal may decide whether to carry the NAS container1 based on network configuration or pre-configuration.

[0175] S1002: The Source gNB decides to perform a handover operation and selects a target gNB (based on measurement reports or candidate cell information, or autonomously). In the case where there is direct communication between the source gNB and the target gNB, the source gNB still sends a handover notification message to the core network, such as a Handover Required message, carrying NAScontainer1. The source gNB may decide not to carry NAS container1, for example, based on the information of the target gNB (whether the target gNB is a non-enhanced gNB).

[0176] S1003: The core network function CN NF parses NAS container1 and reserves core network session resources, such as notifying UPF to reserve an uplink tunnel. The core network function can decide whether to reserve core network session resources, that is, decide whether to send multicast data using a tunnel dedicated to the terminal at the target base station.

[0177] S1004: CN NF sends a handover request to the target gNB, such as sending a Handover Request message.

[0178] S1005: The target base station reserves session resources.

[0179] S1006: The target base station returns a handover response to the CN NF, such as a Handover Response message.

[0180] S1007: The CN NF sends a handover command to the source base station, such as a Handover Command message, which carries the air interface resource information in the received wireless session resources and may also carry NAS container2, where NAS container2 includes a response to the NAS message in NAScontainer1, such as a Service Accept message or a PDU Session Establishment message.

[0181] Step S1008: the source base station sends a handover command to the user terminal UE, carrying the received air interface resource information, and may carry NAS container2.

[0182] S1009: The UE accesses the target base station according to the received air interface resource information, and sends a handover completion message, such as a Handover Confirm message, to the target base station.

[0183] S1010: The target base station sends a session update message to the CN NF.

[0184] S1011: CN NF sends a session update request to the target base station, which may carry session service parameters obtained based on the PDU session information or multicast service identification information in NAS container1, such as session identification (PDU Session ID), service flow identification (QFI), service quality identification (5QI) and other information, or carry multicast service parameters obtained based on the multicast service identification information in NAS container1 (such as multicast service identification, and / or multicast service QoS information).

[0185] S1012: The target base station notifies the terminal UE to reserve air interface resources.

[0186] S1013: The terminal UE returns a confirmation that resources are reserved for the target base station.

[0187] S1014: The target base station reserves session resources, including downlink receiving tunnel resources corresponding to the core network session resource information in S1011, and the target base station returns a session update response to the CN NF, carrying the downlink receiving tunnel resources.

[0188] S1015: CN NF uses the downlink receiving tunnel resources in step S1014 to update the core network session resources, for example, notifying UPF of the downlink receiving tunnel resource information.

[0189] S1016: The core network sends multicast data to the UE through the tunnel corresponding to the session resource information (not a channel shared by multiple terminals, but a channel used only for the UE).

[0190] In another embodiment, S1003 is executed after S1010.

[0191] In another embodiment, the core network function carries NAS container2 in S1004, and the target gNB forwards NAS container2 to the core network function in S1006. The core network function then sends NAScontainer2 in S1007. The purpose of this is to encrypt and secure NAS container2 through the target gNB.

[0192] Optionally, in this embodiment, the core network sends multicast data through a shared channel with the source base station, and the source base station distributes the multicast data to the terminal in a broadcast manner or a point-to-point manner.

[0193] See also Fig.11 As shown, the embodiment of the present application provides another process of switching access network equipment and establishing or activating a PDU session, including but not limited to the following process steps:

[0194] S1101: The terminal UE sends a NAS message to the core network function (such as AMF or SMF), carrying a multicast service identifier (such as TMGI). The NAS message is used to activate or establish a PDU session (therefore carrying a PDU Session ID), such as a ServiceRequest or PDU Session Establishment Request message. The message may also carry a measurement report or candidate cell information, and may also carry multicast service identifier information.

[0195] S1102: The core network function CN NF parses the NAS message, obtains session service parameters based on the PDU session information or multicast service identification information in the NAS message, such as session identification (PDU Session ID), service flow identification (QFI), service quality identification (5QI) and other information, or obtains multicast service parameters (such as multicast service identification and / or multicast service QoS information) based on the multicast service identification information in the NAS message, and sends a message to the source base station, carrying the session service parameters or multicast service parameters, and may also carry NAS container2, which includes a response to the NAS message in S1101, such as a Service Accept message, a Reject message, or a PDU Session Establishment message, and also carries a received measurement report.

[0196] S1103: The core network function CN NF reserves core network session resources, such as notifying the UPF to reserve an uplink tunnel. The core network function can decide whether to reserve core network session resources, that is, decide whether to send multicast data using a tunnel dedicated to the terminal at the target base station. This step can be performed before step S1102.

[0197] S1104: The Source gNB updates the air interface resource information according to the session service parameters after S1102, so that the air interface resource information includes the air interface resource information corresponding to the session service parameters in S802.

[0198] S1105: Source gNB decides to perform a handover operation, selects a target gNB (based on measurement reports or candidate cell information, or autonomously, or based on a multicast service identifier, that is, try to select a target gNB that has provided the corresponding multicast service), and sends a handover notification message to the core network, such as a Handover Required message. The message may carry a multicast service identifier, such as when the selected target gNB is an enhanced one.

[0199] S1106: The CN NF sends a handover request to the target gNB, such as a Handover Request message.

[0200] S1107: The target base station reserves session resources.

[0201] S1108: The target base station returns a handover response to the CN NF, such as a Handover Response message.

[0202] S1109: The CN NF sends a handover command to the source base station, such as a Handover Command message, which carries the air interface resource information in the received wireless session resources and may also carry NAS container2 (if not carried in S1102).

[0203] S1110: The source base station sends a handover command to the user terminal UE, carrying the received air interface resource information, and may carry NAS container2.

[0204] S1111: The UE accesses the target base station according to the received air interface resource information, and sends a handover completion message, such as a Handover Confirm message, to the target base station.

[0205] S1112: The target base station sends a session update message to the CN NF.

[0206] S1113: CN NF updates core network session resources, such as notifying UPF of downlink receiving tunnel resource information.

[0207] S1114: The core network sends multicast data to the UE through the tunnel corresponding to the session resource information (not a channel shared by multiple terminals, but a channel used only for the UE).

[0208] In another embodiment, the core network function carries NAS container2 in S1106, and the target gNB forwards NAS container2 to the core network function in S1108. The core network function then sends NAScontainer2 in S1109. The purpose of this is to encrypt and secure NAS container2 through the target gNB.

[0209] Optionally, in this embodiment, the core network sends multicast data through a shared channel with the source base station, and the source base station distributes the multicast data to the terminal in a broadcast manner or a point-to-point manner.

[0210] See also Fig.12As shown, the embodiment of the present application provides another process of switching access network equipment and establishing or activating a PDU session, including but not limited to the following process steps:

[0211] S1201: The terminal UE sends a NAS message to the core network function (such as AMF or SMF), carrying a multicast service identifier (such as TMGI). The NAS message is used to activate or establish a PDU session (therefore carrying a PDU Session ID), such as a ServiceRequest or PDU Session Establishment Request message. The message may also carry a measurement report or candidate cell information, and may also carry multicast service identifier information.

[0212] S1202: The core network function CN NF parses the NAS message, obtains session service parameters based on the PDU session information or multicast service identification information in the NAS message, such as session identification (PDU Session ID), service flow identification (QFI), service quality identification (5QI) and other information, or obtains multicast service parameters (such as multicast service identification and / or multicast service QoS information) based on the multicast service identification information in the NAS message, and sends a message to the source base station, carrying the session service parameters or multicast service parameters, and may also carry NAS container2, which includes a response to the NAS message in S1201, such as a Service Accept message, a Reject message, or a PDU Session Establishment message, and also carries a received measurement report.

[0213] S1203: The core network function CN NF reserves core network session resources, such as notifying the UPF to reserve an uplink tunnel. The core network function can decide whether to reserve core network session resources, that is, decide whether to use a tunnel dedicated to the terminal to send multicast data at the target base station. This step can be performed before S1202.

[0214] S1204: Source gNB decides to perform a handover operation and selects a target gNB (based on the measurement report or candidate cell information, or autonomously, or based on the multicast service identifier, that is, try to select a target gNB that has provided the corresponding multicast service). After S1202, Source gNB updates the air interface resource information according to the session service parameters, so that the air interface resource information contains the air interface resource information corresponding to the session service parameters in S1202.

[0215] S1205: The Source gNB sends a handover request message to the target base station, such as a Handover Reqest message, which may carry NAS container2 and may also carry a multicast service identifier, such as when the selected target base station is an enhanced one.

[0216] S1206: The target base station reserves session resources.

[0217] S1207: The target base station returns a handover response to the source base station, such as returning a Handover Response message, which carries air interface resource information and may carry NAS container2.

[0218] S1208: The source base station sends a handover command to the user terminal UE, carrying the received air interface resource information, and may carry NAS container2.

[0219] S1209: The UE accesses the target base station according to the received air interface resource information, and sends a handover completion message, such as a Handover Confirm message, to the target base station.

[0220] S1210: The target base station sends a session update message to the CN NF.

[0221] S1211: CN NF updates core network session resources, such as notifying UPF of downlink receiving tunnel resource information.

[0222] S1212: The core network sends multicast data to the UE through the tunnel corresponding to the session resource information (not a channel shared by multiple terminals, but a channel used only for the UE).

[0223] Optionally, in this embodiment, the core network sends multicast data through a shared channel with the source base station, and the source base station distributes the multicast data to the terminal in a broadcast manner or a point-to-point manner.

[0224] It should be noted that the session processing method during the switching process provided by the embodiment of the present application and executed by the terminal device may be executed by a session processing device during the switching process, or a control module in the session processing device during the switching process for executing the session processing method during the switching process. In the embodiment of the present application, the session processing device during the switching process executing the session processing method during the switching process is taken as an example to illustrate the session processing device during the switching process provided by the embodiment of the present application.

[0225] See also Fig.13 As shown, the embodiment of the present application provides a session processing device 1300 in a switching process, which is applied to a terminal device. The session processing device 1300 in the switching process includes:

[0226] The sending module 1301 is configured to send a first non-access stratum NAS container to the network side device, where the first NAS container is generated based on the switching indication and the first NAS information.

[0227] Optionally, in the session processing device 1300 in the switching process of the embodiment of the present application, the above-mentioned switching indication includes at least one of the following: measurement report, candidate cell information, message type information and indication information.

[0228] Optionally, in the session processing device 1300 in the switching process of the embodiment of the present application, the sending module 1301 may also be used to:

[0229] A non-access layer NAS container is sent to the network side device, where the NAS container includes the switching indication and the first NAS information.

[0230] Optionally, in the session processing device 1300 during the switching process of the embodiment of the present application, the sending module 1301 may also be used to: send multicast service identification information to the network side device.

[0231] Optionally, in the session processing device 1300 in the switching process of the embodiment of the present application, the sending module 1301 may also be used to:

[0232] A first non-access layer NAS container is sent to the network side device, where the first NAS container is generated based on at least two of the following: the switching indication; the first NAS information; and the multicast service identification information.

[0233] Optionally, the session processing device 1300 in the switching process of the embodiment of the present application may further include:

[0234] A receiving module is used to receive the multicast service data indicated by the multicast service identification information sent by the network side device through the PDU session.

[0235] Optionally, in the session processing device 1300 in the switching process of the embodiment of the present application, the receiving module may also be used to:

[0236] Receive second NAS information sent by the network side device; wherein the second NAS information is used to respond to the first NAS information.

[0237] In the embodiment of the present application, by sending NAS information for establishing or activating a PDU session to a network side device while issuing a switching indication of an access network device for switching access, a PDU session can be established or activated at the same time during the switching process. In this way, the switching efficiency is improved without affecting data transmission.

[0238] The session processing device in the switching process in the embodiment of the present application can be a device, or a component, integrated circuit, or chip in a terminal device. The device can be a mobile terminal or a non-mobile terminal. Exemplarily, the mobile terminal can include but is not limited to the types of terminals 11 listed above, and the non-mobile terminal can be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0239] The session processing device in the switching process in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0240] The session processing device provided in the switching process of the embodiment of the present application can achieve Figure 2 , Figures 6 to 12 The various related processes implemented in the method embodiment shown achieve the same technical effect and will not be described again here to avoid repetition.

[0241] It should be noted that the session processing method in the switching process provided by the embodiment of the present application and executed by the core network function can be executed by a session processing device in the switching process, or a control module in the session processing device in the switching process for executing the session processing method in the switching process. In the embodiment of the present application, the session processing device in the switching process executing the session processing method in the switching process is taken as an example to illustrate the session processing device in the switching process provided by the embodiment of the present application.

[0242] See also Fig.14 As shown, an embodiment of the present application provides a session processing device 1400 in a switching process, which is applied to a core network function. The session processing device 1400 in the switching process includes: an acquisition module 1401 and a sending module 1403.

[0243] Among them, the acquisition module 1401 is used to obtain a switching indication and a first non-access layer NAS information, and the first NAS information is used to activate or establish a protocol data unit PDU session; the sending module 1403 is used to send the switching indication to the first access network device to which the terminal device is currently connected, or to send a switching request to the second access network device.

[0244] Optionally, the session processing device 1400 in the switching process of the embodiment of the present application may also include a processing module for reserving core network session resources corresponding to the PDU session; and the sending module 1403 may also be used to: send the core network session resources to the second access network device.

[0245] Optionally, in the session processing device 1400 in the switching process of the embodiment of the present application, the sending module 1403 may also be used to:

[0246] Sending a session service parameter or a multicast service parameter to the first access network device or the second access network device; wherein the session service parameter or the multicast service parameter is used by the first access network device to update air interface resource information; or, the session service parameter or the multicast service parameter is used by the second access network device to update air interface resource information.

[0247] Optionally, in the session processing device 1400 during the switching process of the embodiment of the present application, the above-mentioned session service parameters or the multicast service parameters are associated with the PDU session.

[0248] Optionally, in the session processing device 1400 during the switching process of the embodiment of the present application, the above-mentioned session service parameters include at least one of the following: PDU session identification information; flow identification information; service quality QoS parameter information.

[0249] Optionally, in the session processing device 1400 during the switching process of the embodiment of the present application, the above-mentioned multicast service parameters include at least one of the following: multicast service identification information; multicast service flow identification information; QoS parameter information.

[0250] Optionally, in the session processing device 1400 during the handover process of the embodiment of the present application, the handover indication and the first NAS information are acquired through the received first non-access layer NAS container.

[0251] Optionally, in the session processing device 1400 during the switching process of the embodiment of the present application, the above-mentioned receiving module 1401 can also be used to: obtain multicast service identification information.

[0252] Optionally, in the session processing device 1400 during the switching process of the embodiment of the present application, at least two of the following items are obtained through the received first non-access layer NAS container: the switching indication; the first NAS information; the multicast service identification information.

[0253] Optionally, in the session processing device 1400 during the switching process of the embodiment of the present application, the above-mentioned switching indication includes at least one of the following: measurement report, candidate cell information, message type information and indication information.

[0254] Optionally, in the session processing device 1400 in the switching process of the embodiment of the present application, the acquisition module 1401 is used to perform one of the following:

[0255] Receive the switching indication sent by the terminal device; receive the switching indication sent by the first access network device or the second access network device.

[0256] Optionally, in the session processing device 1400 in the switching process of the embodiment of the present application, the sending module 1403 may also be used to:

[0257] Send second NAS information to the first access network device or the second access network device, where the second NAS information is used to respond to the first NAS information.

[0258] Optionally, in the session processing device 1400 in the switching process of the embodiment of the present application, the sending module 1403 may also be used to:

[0259] Sending multicast service data to the terminal device, wherein the multicast service data is associated with the PDU session.

[0260] In the embodiment of the present application, after receiving the switching indication and the first non-access layer NAS information, the core network function can forward the switching indication to the first access network device currently accessed by the terminal device, or send a responsive switching request to the second non-access network device to which the terminal device is to be switched, and receive NAS information for establishing or activating a PDU session while implementing the forwarding of the switching indication or issuing the switching request. In this way, a PDU session can be established or activated simultaneously during the switching process to improve the switching efficiency without affecting data transmission.

[0261] The session processing device in the switching process in the embodiment of the present application can be a device, or a component, integrated circuit, or chip in a network side device. The device can be a core network function. Exemplarily, the network side device can include but is not limited to the types of network side devices 12 listed above.

[0262] The session processing device in the switching process in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0263] The session processing device provided in the switching process of the embodiment of the present application can achieve Figure 3 , Figures 6 to 12 The various related processes implemented in the method embodiment shown achieve the same technical effect and will not be described again here to avoid repetition.

[0264] It should be noted that the session processing method during the switching process provided by the embodiment of the present application and executed by the first access network device may be executed by a session processing device during the switching process, or a control module in the session processing device during the switching process for executing the session processing method during the switching process. In the embodiment of the present application, the session processing device during the switching process executing the session processing method during the switching process is taken as an example to illustrate the session processing device during the switching process provided by the embodiment of the present application.

[0265] See also Fig.15 As shown, an embodiment of the present application provides a session processing device 1500 in a switching process. The session processing device 1500 in the switching process includes: a transmission module 1501 and a processing module 1503.

[0266] Among them, the transmission module 1501 is used to receive a switching indication and a first non-access layer NAS information from a terminal device, and send the first non-access layer NAS information to a core network function or a second access network device; or, the processing module 1503 is used to initiate a switching operation to the core network function or the second access network device according to the switching indication received from the core network function, wherein the switching indication is obtained by the core network function based on the received first NAS information or the first NAS container, and the first NAS container is generated based on the switching indication and the first NAS information; wherein the first NAS information is used to activate or establish a protocol data unit PDU session.

[0267] Optionally, in the session processing device 1500 during the switching process of the embodiment of the present application, the above-mentioned switching indication includes at least one of the following: measurement report, candidate cell information, message type information and indication information.

[0268] Optionally, the session processing device 1500 in the switching process of the embodiment of the present application may further include: an update module.

[0269] Among them, the above-mentioned transmission module 1501 can also be used to receive session service parameters or multicast service parameters sent by the core network function; the above-mentioned update module is used to update the air interface resource information according to the session service parameters or the multicast service parameters; the above-mentioned transmission module 1501 can also be used to send the updated air interface resource information to the second access network device.

[0270] Optionally, in the session processing device 1500 in the switching process of the embodiment of the present application, the transmission module 1501 may also be used to:

[0271] Receive second NAS information sent by the core network function or the second access network device, wherein the second NAS information is used to respond to the first NAS information; and send the second NAS information to the terminal device.

[0272] In an embodiment of the present application, the first access network device to which the terminal device is currently connected can forward the switching instruction issued by the terminal device to the core network function, or initiate a switching operation based on the switching instruction issued by the terminal device forwarded by the core network function, and forward the NAS information used to establish or activate the PDU session to the core network function while implementing the forwarding of the switching instruction or initiating the switching operation. In this way, the PDU session can be established or activated at the same time during the switching process to improve the switching efficiency without affecting data transmission.

[0273] The session processing device in the switching process in the embodiment of the present application can be a device, or a component, integrated circuit, or chip in a network side device. The device can be a core network function. Exemplarily, the network side device can include but is not limited to the types of network side devices 12 listed above.

[0274] The session processing device in the switching process in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0275] The session processing device provided in the switching process of the embodiment of the present application can achieve Figure 4 , Figures 6 to 12 The various related processes implemented in the method embodiment shown achieve the same technical effect and will not be described again here to avoid repetition.

[0276] It should be noted that the session processing method during the switching process provided by the embodiment of the present application and executed by the second access network device may be executed by a session processing device during the switching process, or by a control module in the session processing device during the switching process for executing the session processing method during the switching process. In the embodiment of the present application, the session processing device during the switching process executing the session processing method during the switching process is taken as an example to illustrate the session processing device during the switching process provided by the embodiment of the present application.

[0277] See also Fig.16 As shown, the embodiment of the present application provides a session processing device 1600 in a switching process, and the session processing device 1600 in the switching process includes: a transmission module 1601, which is used to perform at least one of the following operations:

[0278] Update air interface resource information according to the received session service parameters or multicast service parameters, and send the air interface resource information to the first access network device, the session service parameters or the multicast service parameters are determined by the core network function based on the received first non-access layer NAS information; receive second NAS information from the core network function or the first access network device, and send the second NAS information to the first access network device, the second NAS information is used to respond to the first NAS information; wherein the first NAS information is used to activate or establish a protocol data unit PDU session.

[0279] Optionally, in the session processing device 1600 during the switching process of the embodiment of the present application, the above-mentioned transmission module 1601 can also be used to: receive the first NAS information, and send the first NAS information to the core network function.

[0280] In an embodiment of the present application, the second access network device to which the terminal device is to be switched can provide air interface resource information for the first access network device to which the terminal device is currently connected according to the session service parameters or multicast service parameters provided by the core network function, and / or receive the second NAS information sent by the core network function or the first access network device in response to the first NAS information, so as to establish or activate the PDU session at the same time during the switching process, thereby improving the switching efficiency without affecting the data transmission. The session service parameters or multicast service parameters are determined by the core network function based on the first NAS information provided by the terminal device for activating or establishing the protocol data unit PDU session.

[0281] The session processing device in the switching process in the embodiment of the present application can be a device, or a component, integrated circuit, or chip in a network side device. The device can be a core network function. Exemplarily, the network side device can include but is not limited to the types of network side devices 12 listed above.

[0282] The session processing device in the switching process in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0283] The session processing device provided in the switching process of the embodiment of the present application can achieve Figures 5 to 12 The various related processes implemented in the method embodiment shown achieve the same technical effect and will not be described again here to avoid repetition.

[0284] Optional, such as Fig.17As shown, the embodiment of the present application also provides a communication device 1700, including a processor 1701, a memory 1702, and a program or instruction stored in the memory 1702 and executable on the processor 1701. For example, when the communication device 1700 is a terminal, the program or instruction is executed by the processor 1701 to implement the above Figure 2 , Figures 6 to 12 The corresponding relevant processes of the session processing method embodiment in the switching process can achieve the same technical effect. When the communication device 1700 is a network side device, the program or instruction is executed by the processor 1701 to implement the above Figures 3 to 12 The various related processes of the session processing method embodiment in the corresponding switching process can achieve the same technical effect. To avoid repetition, they will not be repeated here.

[0285] Fig.18 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0286] The terminal 1800 includes but is not limited to: a radio frequency unit 1801, a network module 1802, an audio output unit 1803, an input unit 1804, a sensor 1805, a display unit 1806, a user input unit 1807, an interface unit 1808, a memory 1809, and a processor 1810 and other components.

[0287] Those skilled in the art will appreciate that the terminal 1800 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 1810 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.18 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0288] It should be understood that in the embodiment of the present application, the input unit 1804 may include a graphics processor (Graphics Processing Unit, GPU) 18041 and a microphone 18042, and the graphics processor 18041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 1806 may include a display panel 18061, and the display panel 18061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1807 includes a touch panel 18071 and other input devices 18072. The touch panel 18071 is also called a touch screen. The touch panel 18071 may include two parts: a touch detection device and a touch controller. Other input devices 18072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0289] In the embodiment of the present application, the radio frequency unit 1801 receives downlink data from the network side device and sends it to the processor 1810 for processing; in addition, the uplink data is sent to the network side device. Generally, the radio frequency unit 1801 includes but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0290] The memory 1809 can be used to store software programs or instructions and various data. The memory 1809 can mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area can store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1809 can include a high-speed random access memory, and can also include a non-volatile memory, wherein the non-volatile memory can be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or a flash memory. For example, at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device.

[0291] The processor 1810 may include one or more processing units; optionally, the processor 1810 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and application programs or instructions, etc., and the modem processor mainly processes wireless communications, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1810.

[0292] The radio frequency unit 1801 is used to send a switching indication and first non-access layer NAS information to a network side device, where the first NAS information is used to activate or establish a protocol data unit PDU session.

[0293] In the embodiment of the present application, by sending NAS information for establishing or activating a PDU session to a network side device while issuing a switching indication of an access network device for switching access, a PDU session can be established or activated at the same time during the switching process. In this way, the switching efficiency is improved without affecting data transmission.

[0294] The present application embodiment also provides a network side device. Fig.19 As shown, the network device 1900 includes: an antenna 1901, a radio frequency device 1902, and a baseband device 1903. The antenna 1901 is connected to the radio frequency device 1902. In the uplink direction, the radio frequency device 1902 receives information through the antenna 1901 and sends the received information to the baseband device 1903 for processing. In the downlink direction, the baseband device 1903 processes the information to be sent and sends it to the radio frequency device 1902, and the radio frequency device 1902 processes the received information and sends it out through the antenna 1901.

[0295] The above-mentioned frequency band processing device may be located in the baseband device 1903 . The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1903 . The baseband device 1903 includes a processor 1904 and a memory 1905 .

[0296] The baseband device 1903 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig.19 As shown, one of the chips is, for example, a processor 1904, which is connected to a memory 1905 to call a program in the memory 1905 to execute the network device operations shown in the above method embodiment.

[0297] The baseband device 1903 may further include a network interface 1906 for exchanging information with the radio frequency device 1902 . The interface may be, for example, a common public radio interface (CPRI).

[0298] Specifically, the network side device of the embodiment of the present invention further includes: instructions or programs stored in the memory 1905 and executable on the processor 1904, and the processor 1904 calls the instructions or programs in the memory 1905 to execute Figures 14 to 16 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0299] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the session processing method embodiment in any of the above-mentioned switching processes is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0300] The processor is a processor in the terminal device or the network side device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0301] An embodiment of the present application further provides a computer program product, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor. When the program or instruction is executed by the processor, each process of the session processing method embodiment in the above-mentioned corresponding switching process is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0302] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a terminal device or a network side device program or instruction to implement each process of the session processing method embodiment in the above-mentioned corresponding switching process, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0303] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0304] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0305] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0306] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A session processing method during a switching process, applied to a terminal device, characterized in that: The method comprises: A first non-access stratum NAS container is sent to a network side device, and a switching indication and first non-access stratum NAS information are simultaneously sent to the network side device through the first NAS container, wherein the first NAS container is generated based on the switching indication and the first NAS information, the switching indication is used for switching of the access network device, and the first NAS information is used to activate or establish a protocol data unit PDU session.

2. The method according to claim 1, characterized in that The handover indication includes at least one of the following: a measurement report, candidate cell information, message type information and indication information.

3. The method according to claim 1, characterized in that The method further comprises: Send multicast service identification information to the network side device.

4. The method according to claim 3, characterized in that The first NAS container is generated based on the switching indication, the first NAS information and the multicast service identification information.

5. The method according to claim 3, characterized in that: The method further comprises: Receive multicast service data indicated by the multicast service identification information sent by the network side device through the PDU session.

6. The method according to claim 1, characterized in that The method further comprises: Receiving second NAS information sent by the network side device; The second NAS information is used to respond to the first NAS information.

7. A session processing method during a handover process, applied to a core network function, characterized in that: The method comprises: Acquire a switching indication and first non-access layer NAS information, wherein the switching indication is used for switching of an access network device, and the first NAS information is used for activating or establishing a protocol data unit PDU session; Sending the switching indication to the first access network device currently accessed by the terminal device, or sending a switching request to the second access network device; The switching indication and the first NAS information are obtained through the received first non-access layer NAS container.

8. The method according to claim 7, characterized in that The method further comprises: Reserving core network session resources corresponding to the PDU session; Send the core network session resources to the second access network device.

9. The method according to claim 7, characterized in that: The method further comprises: Sending a session service parameter or a multicast service parameter to the first access network device or the second access network device; The session service parameter or the multicast service parameter is used by the first access network device to update air interface resource information; Alternatively, the session service parameter or the multicast service parameter is used by the second access network device to update air interface resource information.

10. The method according to claim 9, characterized in that The session service parameter or the multicast service parameter is associated with the PDU session.

11. The method according to claim 9, characterized in that The session service parameters include at least one of the following: PDU session identification information; Flow identification information; Quality of Service (QoS) parameter information.

12. The method according to claim 9, characterized in that The multicast service parameters include at least one of the following: Multicast service identification information; Multicast service flow identification information; QoS parameter information.

13. The method according to claim 7, characterized in that The method further comprises: Get multicast service identification information.

14. The method according to claim 13, characterized in that The multicast service identification information is obtained through the received first non-access layer NAS container.

15. The method according to claim 7, characterized in that The handover indication includes at least one of the following: a measurement report, candidate cell information, message type information and indication information.

16. The method according to claim 15, characterized in that The obtaining of the switching indication includes one of the following: Receiving the switching instruction sent by the terminal device; Receive the switching indication sent by the first access network device or the second access network device.

17. The method according to claim 7, characterized in that The method further comprises: Send second NAS information to the first access network device or the second access network device, where the second NAS information is used to respond to the first NAS information.

18. The method according to claim 7, characterized in that The method further comprises: Sending multicast service data to the terminal device, wherein the multicast service data is associated with the PDU session.

19. A session processing method in a switching process, applied to a first access network device, characterized in that: The method comprises: receiving a switching indication and first non-access layer NAS information sent simultaneously from a terminal device, and sending the first non-access layer NAS information to a core network function or a second access network device; or, Initiate a handover operation to the core network function or the second access network device according to a handover indication received from the core network function, wherein the handover indication is obtained by the core network function based on the received first NAS information or a first NAS container, and the first NAS container is generated based on the handover indication and the first NAS information; The switching indication is used for switching of access network equipment, and the first NAS information is used for activating or establishing a protocol data unit PDU session.

20. The method according to claim 19, characterized in that The handover indication includes at least one of the following: a measurement report, candidate cell information, message type information and indication information.

21. The method according to claim 19, characterized in that After receiving a switching indication from the terminal device or the core network function, the method further includes: Receiving session service parameters or multicast service parameters sent by the core network function; Updating air interface resource information according to the session service parameter or the multicast service parameter; The updated air interface resource information is sent to the second access network device.

22. The method according to claim 19, characterized in that The method further comprises: receiving second NAS information sent by the core network function or the second access network device, wherein the second NAS information is used to respond to the first NAS information; The second NAS information is sent to the terminal device.

23. A session processing device in a switching process, applied to a terminal device, characterized in that: include: A sending module is used to send a first non-access layer NAS container to a network side device, and send a switching indication and a first non-access layer NAS information to the network side device through the first NAS container at the same time, wherein the first NAS container is generated based on the switching indication and the first NAS information, the switching indication is used for switching of the access network device, and the first NAS information is used to activate or establish a protocol data unit PDU session.

24. A session processing device in a switching process, applied to a core network function, characterized in that: include: an acquisition module, configured to acquire a switching indication and first non-access layer NAS information, wherein the switching indication is used for switching of an access network device, and the first NAS information is used for activating or establishing a protocol data unit PDU session; wherein the switching indication and the first NAS information are acquired through a received first non-access layer NAS container; A sending module is used to send the switching indication to the first access network device to which the terminal device is currently connected, or to send a switching request to the second access network device.

25. A session processing device in a switching process, applied to a first access network device, characterized in that: include: A transmission module, used to receive a switching indication and a first non-access layer NAS information sent simultaneously from a terminal device, and send the first non-access layer NAS information to a core network function or a second access network device; a processing module, configured to initiate a handover operation to the core network function or the second access network device according to a handover indication received from the core network function, wherein the handover indication is obtained by the core network function based on the received first NAS information or a first NAS container, and the first NAS container is generated based on the handover indication and the first NAS information; The switching indication is used for switching of access network equipment, and the first NAS information is used for activating or establishing a protocol data unit PDU session.

26. A terminal device, characterized in that: include: A memory, a processor, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method according to any one of claims 1 to 6.

27. A network side device, characterized in that: include: A memory, a processor, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method as described in any one of claims 7 to 18, or the program or instruction, when executed by the processor, implements the steps of the method as described in any one of claims 19 to 22.

28. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the program or instruction implements the steps of the method as claimed in any one of claims 1 to 6, or when the program or instruction is executed by the processor, the program or instruction implements the steps of the method as claimed in any one of claims 7 to 18, or when the program or instruction is executed by the processor, the program or instruction implements the steps of the method as claimed in any one of claims 19 to 22.

Images