CN115706944A

CN115706944A - Call service processing method, device and network equipment

Info

Publication number: CN115706944A
Application number: CN202110928790.XA
Authority: CN
Inventors: 路安江; 魏茂坤
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2023-02-17

Abstract

The embodiment of the application provides a method, a device and network equipment for processing a call service, wherein the method comprises the steps that a session management function network element determines a first cell where terminal equipment is located; under the condition that the terminal equipment has signed a rapid calling service and the first cell supports the rapid calling service, acquiring a predetermined first user plane function network element corresponding to the first cell; and interacting with the first user plane function network element, and establishing a first tunnel for the terminal equipment, wherein the first tunnel is a tunnel for transmitting a quality of service flow of voice data. Therefore, the embodiment of the application can reduce the influence of the resource reservation speed on the SIP signaling connection duration, and further shorten the VoNR connection delay.

Description

Call service processing method, device and network equipment

Technical Field

The present invention relates to the field of mobile communications technologies, and in particular, to a method, an apparatus, and a network device for processing a call service.

Background

Currently, 5G follows the voice architecture of 4G, i.e. still providing voice services based on IP Multimedia Core Network Subsystem (IMS). The 4G wireless access technology is Long Term Evolution (LTE), and voice carried by the technology is called voice over Long Term Evolution (voicelte); the Radio access technology of 5G is New Radio (NR), and the voice bearer on the New Radio is called voice bearer under 5G access (VoiceOverNR, voNR). VoLTE, voNR exist as different access means for IMS voice. Moreover, because of the consistency of the architecture, the methods for establishing the signaling bearer and the voice bearer are also consistent, that is, a Quality of Service Flow (QoS Flow) for carrying signaling and a QoS Flow for carrying voice Service need to be present, which can be understood as the establishment process of two QoS flows in a Protocol Data Unit Session (PDU Session).

The 5G voice network consists of a 5G wireless network, a 5G core network (5 GC) and an IMS network, wherein the 5G wireless network provides user access and voice radio bearer, the 5GC provides core network bearer and voice service continuity, and the IMS provides session control and voice service.

When the terminal device accesses the network, a default load of 5G QoS identifier (5G QoS identifier, 5qi) =5 is established, which is used for transmitting Session Initiation Protocol (SIP) signaling, and sending an SIP register message to the IMS to perform IMS domain registration. When dialing VoNR, the terminal equipment mainly completes the following two tasks:

1. a 5G wireless network and a 5GC carry out special load establishment of 5QI =1 for transmitting voice data on a calling terminal and a called terminal;

2. the calling and called terminals carry out the connection of SIP signaling through IMS to complete the media negotiation.

After the two operations are completed, the called terminal rings, and the VoNR is continued successfully.

Therefore, the main factors influencing the turn-on delay of the VONR are: 1. 5QI =1 setup time for the spot load; 2. SIP signaling connection time. The two tasks are not completely independent, but have a restriction relation. For example, the called party should not ring before the resource reservation of both the calling and called parties is successful, thereby minimizing the situation that the called party rings but fails to receive the call. Therefore, the resource reservation speed can affect the SIP signaling connection duration, resulting in a prolonged VoNR connection delay. The process of establishing a bearer for exclusively transmitting user voice data is called resource reservation or preset condition.

Disclosure of Invention

The embodiment of the application provides a call service processing method, a call service processing device and network equipment, so as to reduce the influence of the resource reservation speed on the connection duration of an SIP signaling, and further shorten the VoNR connection delay.

In a first aspect, an embodiment of the present application provides a method for processing a call service, where the method is applied to a network element with a session management function, and the method includes:

determining a first cell in which the terminal equipment is located;

under the condition that the terminal equipment has signed a rapid calling service and the first cell supports the rapid calling service, acquiring a predetermined first user plane function network element corresponding to the first cell;

and interacting with the first user plane function network element, and establishing a first tunnel for the terminal equipment, wherein the first tunnel is a tunnel for transmitting a quality of service flow of voice data.

Optionally, before the obtaining the predetermined first user plane function network element corresponding to the first cell, the method further includes:

sending a first request message to a unified data management network element, wherein the first request message is used for requesting session management subscription data of the terminal equipment;

receiving session management subscription data of the terminal equipment, which is sent by the unified data management network element;

detecting whether the session management subscription data carries preset indication information or not, and obtaining a detection result;

and determining whether the terminal equipment signs a rapid call service or not according to the detection result and the value of the preset indication information.

acquiring target parameter information of the protocol data unit session established by the terminal equipment;

acquiring a target tracking area code list corresponding to the target parameter information in a predetermined first list, wherein the first list comprises a corresponding relation between the parameter information of the protocol data unit session and the tracking area list;

and under the condition that the target tracking area code list comprises the tracking area code of the first cell, determining that the first cell supports the quick call service.

Optionally, the obtaining a predetermined first user plane function network element corresponding to the first cell includes:

acquiring a first user plane function network element corresponding to the tracking area code of the first cell in a predetermined second list;

wherein the second list comprises a corresponding relationship between the tracking area code and the user plane function network element.

Optionally, the interacting with the first user plane function network element to establish a first tunnel for the terminal device includes:

sending first indication information and identification information of an N3 endpoint of a first base station to which the first cell belongs to the first user plane function network element, where the first indication information is used to indicate that an N3 endpoint and an N6 endpoint of the first tunnel are established on the first user plane function network element, and establish a connection between the N3 endpoint of the first tunnel on the first user plane function network element and the N3 endpoint of the first base station, and a connection between the N6 endpoint of the first tunnel on the first user plane function network element and an IP multimedia subsystem;

sending, to the first base station, identification information of an N3 endpoint of the first tunnel on the first user plane function network element and second indication information through an access and mobility management function network element, where the second indication information is used to indicate that a connection between the N3 endpoint of the first base station and the N3 endpoint of the first tunnel on the first user plane function network element is established.

Optionally, the method further includes:

and under the condition that the terminal equipment has signed a quick call service and the first cell supports the quick call service, interacting with a core user plane functional network element and the first user plane functional network element, and moving a second tunnel from the core user plane functional network element to the first user plane functional network element, wherein the second tunnel is a tunnel used for transmitting a quality of service (QoS) flow of Session Initiation Protocol (SIP) signaling.

Optionally, the interacting with the core user plane function network element and the first user plane function network element, and moving the second tunnel from the core user plane function network element to the first user plane function network element, includes:

sending third indication information to the core user plane function network element, where the third indication information is used to indicate to delete an N3 endpoint and an N6 endpoint of the second tunnel on the core user plane function network element;

and sending fourth indication information to the first user plane function network element, where the fourth indication information is used to indicate that an N3 endpoint and an N6 endpoint of the second tunnel are established on the first user plane function network element, and establish a connection between the N3 endpoint of the second tunnel on the first user plane function network element and the N3 endpoint of the first base station to which the first cell belongs, and a connection between the N6 endpoint of the second tunnel on the first user plane function network element and an IP multimedia subsystem.

Optionally, the method further includes:

and under the condition that the terminal equipment has signed a quick call service and the first cell supports the quick call service, interacting with a core user plane function network element and the first user plane function network element, and inserting the first user plane function network element into a third tunnel, wherein the third tunnel comprises a tunnel of a quality of service flow except the first tunnel and the second tunnel, and the second tunnel is a tunnel of the quality of service flow for transmitting session initial protocol signaling.

Optionally, the interacting with the core user plane function network element and the first user plane function network element, and inserting the first user plane function network element into a third tunnel include:

sending fifth indication information to the core user plane function network element, where the fifth indication information is used to indicate that the N3 endpoint of the third tunnel on the core user plane function network element is deleted, and establish an N9 endpoint of the third tunnel on the core user plane function network element;

and sending sixth indication information to the first user plane function network element, where the sixth indication information is used to indicate that an N3 endpoint and an N9 endpoint of the third tunnel are established on the first user plane function network element, and establish a connection between the N3 endpoint of the third tunnel on the first user plane function network element and the N3 endpoint of the first base station to which the first cell belongs, and a connection between the N9 endpoint of the third tunnel on the first user plane function network element and the N9 endpoint of the third tunnel on the core user plane function network element.

Optionally, the method further includes:

and interacting with the first user plane function network element and deleting the tunnel on the first user plane function network element under the condition that the terminal equipment moves to a second cell and the second cell does not support the quick call service.

Optionally, after the interacting with the first user plane function network element and deleting the tunnel on the first user plane function network element, the method further includes at least one of the following steps:

sending seventh indication information to the core user plane function network element under the condition that an N9 endpoint of a third tunnel is established on the core user plane function network element;

sending eighth indication information to the core user plane function network element under the condition that the N3 endpoint and the N6 endpoint of the second tunnel do not exist on the core user plane function network element;

under the condition that the edge computing application exists in the second cell, acquiring a predetermined second user plane functional network element corresponding to the second cell, interacting with the second user plane functional network element, and establishing a fourth tunnel for the terminal equipment;

the second tunnel is a tunnel used for transmitting a quality of service flow of session initiation protocol signaling, the third tunnel comprises a tunnel of the quality of service flow except the first tunnel and the second tunnel, and the fourth tunnel is a tunnel used for bearing the quality of service flow of edge computing data;

the seventh indication information is used to indicate to delete an N9 endpoint of the third tunnel on the core user plane functional network element, establish an N3 endpoint of the third tunnel on the core user plane functional network element, establish a connection between the N3 endpoint of the third tunnel on the core user plane functional network element and an N3 endpoint of the second base station to which the second cell belongs, and establish a connection between an N6 endpoint of the third tunnel on the core user plane functional network element and a data network;

the eighth indication information is used to indicate that an N3 endpoint and an N6 endpoint of a second tunnel are established on the core user plane function network element, and establish a connection between the N3 endpoint of the second tunnel and the N3 endpoint of the second base station on the core user plane function network element, and a connection between the N6 endpoint of the second tunnel and the IP multimedia subsystem on the core user plane function network element.

Optionally, the determining the first cell in which the terminal device is located includes:

under the condition that the terminal equipment moves to a cell, determining the cell to which the terminal equipment moves as the first cell;

or

And under the condition that the terminal equipment accesses a cell, determining the cell accessed by the terminal equipment as the first cell.

Optionally, the method further includes:

and interacting with a policy and charging control function network element to acquire policy and charging control rule information of the first tunnel under the condition that the terminal equipment has signed a fast call service and the first cell supports the fast call service, wherein the policy and charging control rule information of the first tunnel comprises flow description information, and the configuration of the flow description information in the policy and charging control function network element is the same as the configuration of the flow description information in the IP multimedia subsystem.

Optionally, the interacting with the policy control function network element to obtain the policy and charging control rule information of the first tunnel includes:

sending ninth indication information to the policy control function network element, where the ninth indication information is used to indicate that the terminal device has signed a quick call service, and the first cell supports a quick call service;

and receiving the policy and charging control rule information of the first tunnel sent by the policy control function network element.

Optionally, after the interacting with the policy control function network element and acquiring the policy and charging control rule information of the first tunnel, the method further includes:

and sending tenth indication information to the policy control function network element when the terminal device moves to a second cell and the second cell does not support the fast call service, wherein the tenth indication information is used for indicating that the second cell does not support the fast call service and indicating that the policy control function network element deletes the policy and charging control rule information of the first tunnel.

Optionally, the method further includes:

and interacting with the first user plane functional network element under the condition that the first cell has the edge computing application, and establishing a fourth tunnel on the first user plane functional network element, wherein the fourth tunnel is a tunnel used for bearing a service quality flow of edge computing data.

Optionally, the interacting with the first user plane function network element and establishing a fourth tunnel on the first user plane function network element include:

and sending eleventh indication information to the first user plane function network element, where the eleventh indication information is used to indicate that an N3 endpoint and an N6 endpoint of the fourth tunnel are established on the first user plane function network element, and establish a connection between the N3 endpoint of the fourth tunnel on the first user plane function network element and the N3 endpoint of the first base station to which the first cell belongs, and a connection between the N6 endpoint of the fourth tunnel on the first user plane function network element and an edge computing server.

In a second aspect, an embodiment of the present application provides a method for processing a call service, where the method is applied to a first user plane function network element, and the method includes:

under the condition that terminal equipment has signed a rapid call service and a first cell in which the terminal equipment is positioned supports the rapid call service, interacting with a session management function network element to establish a first tunnel for the terminal equipment;

the first user plane function network element is a predetermined user plane function network element corresponding to the first cell, and the first tunnel is a tunnel used for transmitting a quality of service flow of voice data.

Optionally, the interacting with the network element with session management function to establish the first tunnel for the terminal device includes:

receiving first indication information sent by the session management function network element and identification information of an N3 endpoint of a first base station to which the first cell belongs;

and according to the first indication information and the identification information of the N3 endpoint of the first base station, establishing an N3 endpoint and an N6 endpoint of the first tunnel on the first user plane function network element, and establishing a connection between the N3 endpoint of the first tunnel on the first user plane function network element and the N3 endpoint of the first base station, and a connection between the N6 endpoint of the first tunnel on the first user plane function network element and an IP multimedia subsystem.

Optionally, the method further includes:

receiving fourth indication information sent by the session management function network element under the condition that the terminal device has signed a fast call service and the first cell supports the fast call service;

according to the fourth indication information, establishing an N3 endpoint and an N6 endpoint of a second tunnel on the first user plane function network element, and establishing a connection between the N3 endpoint of the second tunnel on the first user plane function network element and the N3 endpoint of the first base station to which the first cell belongs, and a connection between the N6 endpoint of the second tunnel on the first user plane function network element and an IP multimedia subsystem;

wherein the second tunnel is a tunnel for transmitting a quality of service flow of session initiation protocol signaling.

Optionally, the method further includes:

receiving sixth indication information sent by the session management function network element under the condition that the terminal device has signed a quick call service and the first cell supports the quick call service;

according to the sixth indication information, establishing an N3 endpoint and an N9 endpoint of a third tunnel on the first user plane functional network element, and establishing a connection between the N3 endpoint of the third tunnel on the first user plane functional network element and the N3 endpoint of the first base station to which the first cell belongs, and a connection between the N9 endpoint of the third tunnel on the first user plane functional network element and the N9 endpoint of the third tunnel on a core user plane functional network element;

wherein the third tunnel comprises a tunnel of a quality of service flow except the first tunnel and the second tunnel, and the second tunnel is a tunnel of a quality of service flow for transmitting session initiation protocol signaling.

Optionally, the method further includes:

and interacting with the session management function network element and deleting the tunnel on the first user plane function network element under the condition that the terminal equipment moves to a second cell and the second cell does not support the quick call service.

Optionally, the method further includes:

and under the condition that the edge computing application exists in the first cell, establishing a fourth tunnel on the first user plane functional network element with the session management functional network element, wherein the fourth tunnel is a tunnel for bearing a quality of service flow of edge computing data.

Optionally, the establishing, with the session management function network element, a fourth tunnel on the first user plane function network element includes:

receiving eleventh indication information sent by the session management function network element;

according to the eleventh indication information, establishing an N3 endpoint and an N6 endpoint of the fourth tunnel on the first user plane function network element, and establishing a connection between the N3 endpoint of the fourth tunnel on the first user plane function network element and an N3 endpoint of a first base station to which the first cell belongs, and a connection between the N6 endpoint of the fourth tunnel on the first user plane function network element and an edge computing server.

In a third aspect, an embodiment of the present application provides a method for processing a call service, where the method is applied to a core user plane functional network element, and the method includes:

receiving third indication information sent by a session management function network element under the condition that a terminal device has signed a fast call service, a first cell in which the terminal device is located supports the fast call service, and a first tunnel is established for the terminal device on a first user plane function network element;

deleting the N3 endpoint and the N6 endpoint of the second tunnel on the core user plane function network element according to the third indication information;

the first user plane functional network element is a predetermined user plane functional network element corresponding to the first cell, the first tunnel is a tunnel used for transmitting a quality of service flow of voice data, and the second tunnel is a tunnel used for transmitting a quality of service flow of session initiation protocol signaling.

Optionally, the method further includes:

receiving eighth indication information sent by the session management function network element when the terminal device moves to a second cell and the second cell does not support a quick call service;

and according to the eighth indication information, establishing an N3 endpoint and an N6 endpoint of the second tunnel on the core user plane function network element, and establishing a connection between the N3 endpoint of the second tunnel on the core user plane function network element and an N3 endpoint of a second base station to which the second cell belongs, and a connection between the N6 endpoint of the second tunnel on the core user plane function network element and an IP multimedia subsystem.

Optionally, the method further includes:

receiving fifth indication information sent by a session management function network element under the condition that a terminal device has signed a fast call service, the first cell supports the fast call service, and a first tunnel is established for the terminal device on a first user plane function network element;

deleting an N3 endpoint of a third tunnel on the core user plane function network element according to the fifth indication information, and establishing an N9 endpoint of the third tunnel on the core user plane function network element;

Optionally, the method further includes:

receiving seventh indication information sent by the session management function network element when the terminal device moves to a second cell and the second cell does not support a quick call service;

according to the seventh indication information, deleting the N9 endpoint of the third tunnel on the core user plane functional network element, establishing the N3 endpoint of the third tunnel on the core user plane functional network element, and establishing a connection between the N3 endpoint of the third tunnel on the core user plane functional network element and the N3 endpoint of the second base station to which the second cell belongs, and a connection between the N6 endpoint of the third tunnel on the core user plane functional network element and a data network.

In a fourth aspect, an embodiment of the present application provides a call service processing apparatus, which is applied to a network element with a session management function, where the apparatus includes:

the cell determining module is used for determining a first cell where the terminal equipment is located;

a network element determining module, configured to obtain a predetermined first user plane functional network element corresponding to the first cell when the terminal device has signed a fast call service and the first cell supports the fast call service;

a first establishing module, configured to interact with the first user plane function network element, and establish a first tunnel for the terminal device, where the first tunnel is a tunnel used for transmitting a quality of service flow of voice data.

In a fifth aspect, an embodiment of the present application provides a call service processing apparatus, which is applied to a first user plane function network element, where the apparatus includes:

the second establishing module is used for interacting with a session management function network element under the condition that the terminal equipment has signed a rapid call service and a first cell where the terminal equipment is located supports the rapid call service, and establishing a first tunnel for the terminal equipment;

In a sixth aspect, an embodiment of the present application provides a call service processing apparatus, which is applied to a core user plane functional network element, where the apparatus includes:

a first receiving module, configured to receive, when a terminal device has signed a fast call service, a first cell in which the terminal device is located supports the fast call service, and a first tunnel is established for the terminal device on a first user plane functional network element, third indication information sent by a session management functional network element;

a first deleting module, configured to delete an N3 endpoint and an N6 endpoint of the second tunnel on the core user plane function network element according to the third indication information;

In a seventh aspect, an embodiment of the present application provides a network device, which is applied to a session management function network element, and includes a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for use in the method of the first aspect.

In an eighth aspect, an embodiment of the present application provides a network device, which is applied to a first user plane function network element, and includes:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor configured to perform the method of the second aspect.

In a ninth aspect, an embodiment of the present application provides a network device, which is applied to a core user plane function network element, and includes:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor configured to perform the method of the third aspect.

In a tenth aspect, an embodiment of the present application provides a processor-readable storage medium, which stores a computer program for causing a processor to execute the method of any one of the above.

In this embodiment of the present application, the session management function network element may determine a first cell in which the terminal device is located, so that, when the terminal device has signed a fast call service and the first cell supports the fast call service, a predetermined first user plane function network element corresponding to the first cell is obtained, and then interacts with the first user plane function network element to establish a tunnel for transmitting a quality of service flow of voice data for the terminal device.

Therefore, in the embodiment of the present invention, a cell capable of supporting a fast call service is configured in advance, and a terminal device signs a fast call service in advance, so that when a terminal device that has signed a fast call service is in the cell that supports the fast call service, a tunnel for transmitting a quality of service flow of voice data may be established in advance for the mobile terminal (i.e., an exclusive load of 5qi =1 is established), that is, an exclusive load of 5qi =1 is established in advance before the terminal device is called or the terminal device initiates a call, thereby implementing resource reservation between a calling party and a called party. Thus, when dialing the VoNR, since the 5qi =1 exclusive load is established in advance, the calling and called terminals only need to interact with the SIP signaling, so that the on-delay of the VoNR can be shortened.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic illustration of a VoNR caller flow in the prior art;

FIG. 2 is a schematic view of a VoNR called flow in the prior art;

fig. 3 is a schematic flowchart of a call service processing method according to an embodiment of the present application;

fig. 4 is a schematic flowchart of another call service processing method according to an embodiment of the present application;

fig. 5 is a schematic flowchart of another call service processing method according to an embodiment of the present application;

fig. 6 is a schematic flowchart of resource reservation triggered by a terminal device moving into a TAC region supporting a fast call service in an embodiment of the present application;

fig. 7 is a schematic flowchart of resource reservation triggered by a terminal device accessing a TAC region supporting a fast call service according to the present application;

fig. 8 is a schematic diagram of a traffic plane path formed after a resource reservation procedure is performed in an embodiment of the present application;

fig. 9 is a schematic flowchart of a process of triggering deletion of advance resource reservation by a terminal device moving out of a TAC region supporting a quick call service in an embodiment of the present application;

FIG. 10 is a schematic VoNR call flow diagram in an embodiment of the present application;

FIG. 11 is a schematic view of a VoNR called flow in the present embodiment;

fig. 12 is a schematic view illustrating a VoNR call release process according to an embodiment of the present application;

fig. 13 is a block diagram of a call service processing apparatus according to an embodiment of the present application;

fig. 14 is a block diagram of another call service processing device according to an embodiment of the present application;

fig. 15 is a block diagram of another call service processing apparatus according to an embodiment of the present application;

fig. 16 is a block diagram of a network device according to an embodiment of the present application.

Detailed Description

In the embodiment of the present application, the term "and/or" describes an association relationship of associated objects, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a call service processing method, a call service processing device and network equipment, so as to reduce the influence of the resource reservation speed on the SIP signaling connection duration, and further shorten the VoNR connection delay.

The method and the device are based on the same application concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.

In addition, the technical scheme provided by the embodiment of the application can be applied to various systems, especially 5G systems. For example, the applicable system may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, a long term evolution (long term evolution, LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, an LTE-a (long term evolution) system, a universal mobile system (universal mobile telecommunications system, UMTS), a universal internet Access (WiMAX) system, a New Radio Network (NR) system, etc. These various systems include terminal devices and network devices. The System may further include a core network portion, such as an Evolved Packet System (EPS), a 5G System (5 GS), and the like.

The terminal device referred to in the embodiments of the present application may refer to a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or another processing device connected to a wireless modem. In different systems, the names of the terminal devices may be different, for example, in a 5G system, the terminal device may be called a User Equipment (UE). A wireless terminal device, which may be a mobile terminal device such as a mobile phone (or called a "cellular" phone) and a computer having a mobile terminal device, for example, a portable, pocket, hand-held, computer-included or vehicle-mounted mobile device, may communicate with one or more Core Networks (CNs) via a Radio Access Network (RAN), and may exchange languages and/or data with the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, session Initiation Protocol (SIP) phones, wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). The wireless terminal device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an access point (access point), a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in this embodiment of the present application.

The network device according to the embodiment of the present application may be a base station, and the base station may include a plurality of cells for serving a terminal. A base station may also be referred to as an access point, or a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or by other names, depending on the particular application. The network device may be configured to exchange received air frames with Internet Protocol (IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) or a Code Division Multiple Access (CDMA), may also be a network device (NodeB) in a Wide-band Code Division Multiple Access (WCDMA), may also be an evolved Node B (eNB or e-NodeB) in a Long Term Evolution (LTE) System, a 5G Base Station (gNB) in a 5G network architecture (next generation System), may also be a Home evolved Node B (HeNB), a relay Node (relay Node), a Home Base Station (femto), a pico Base Station (pico) and the like, and the present application is not limited in this embodiment. In some network configurations, a network device may include Centralized Unit (CU) nodes and Distributed Unit (DU) nodes, which may also be geographically separated.

Multiple Input Multiple Output (MIMO) transmission may be performed between the network device and the terminal device by using one or more antennas, where the MIMO transmission may be Single User MIMO (SU-MIMO) or Multi-User MIMO (MU-MIMO). According to the form and the number of the root antenna combination, the MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, and can also be diversity transmission, precoding transmission, beamforming transmission, etc.

For facilitating understanding of the call service processing method in the embodiment of the present application, the following description is first made on related technologies in the prior art.

As shown in fig. 1, the VoNR calling process in the prior art includes the following steps 101 to 105:

step 101: if the terminal is in an idle state when a VoNR call is dialed, a Service Request (Service Request) process needs to be started, and end-to-end signaling connection and User Plane bearer from the UE to a User Plane Function network element (UPF) are restored. Wherein, the Service Request process mainly comprises the following contents A-1 to A-9:

a-1: the UE sends a radio resource control connection request (RRCConnectionrequest) message to the gNB to request the establishment of RRC connection;

a-2: the gNB sends a radio resource control connection setup (RRCConnectionSetup) message to the UE to start to establish RRC connection;

a-3: the method comprises the steps that UE sends a radio resource control connection setup complete (RRCConnectionSetupCompute) message to a gNB, wherein a non-Access stratum (NAS layer) Service Request message sent by the UE to an Access and Mobility Management Function (AMF) is carried;

a-4: the gNB sends an access stratum (AS layer) initialization (Initial) UE message to the AMF to Request to establish N2 interface connection for the user, wherein the message carries an NAS layer Service Request message sent to the AMF by the UE in A-3;

a-5: AMF calls an Nsmf _ PDUSESION _ UpdateSMContext service operation (Nsmf _ PDUSESION _ UpdateSMContext service operation) of a Session Management Function network element (SMF) to request the Session Management Function (SMF) to activate a user plane resource of a protocol data unit Session (PDU Session), and a response message of the SMF contains the N3 interface tunnel resource information of UPF; wherein, nsmf _ PDUSESION _ UpdateSMContext is the message name;

a-6: AMF sends an INITIAL CONTEXT SETUP REQUEST (INITIAL CONTEXT SETUP REQUEST) message to gNB, wherein the message contains the N3 interface tunnel resource information of User Plane Function (UPF);

a-7: performing a Security flow between the gNB and the UE (namely, the gNB sends a Security Mode Command (Security Mode Command) to the UE, the UE replies a Security Mode completion (Security Mode Complete) message to the gNB), allocates air interface resources to the UE, and then returns an INITIAL CONTEXT SETUP RESPONSE (INITIAL CONTEXT SETUP RESPONSE) message to the AMF, wherein the message includes N3 interface tunnel resource information allocated by the gNB for each PDU Session;

a-8: AMF calls the Nsmf _ PDUSESION _ UpdateSMContext service operation of SMF, and requests SMF to update the N3 interface tunnel resource information distributed by gNB to UPF;

a-9: the SMF sends an N4 Session Modification Request (N4 Session Modification Request) message to the UPF, and requests to update the N3 interface tunnel resource information allocated by the gNB, wherein the UPF returns a response message to the SMF after the update is successful.

Step 102: the terminal initiates a Call, sends a Session initiation protocol invitation (SIP INVITE) message to a Proxy Call Session Control function network element (P-CSCF), and the P-CSCF analyzes Proxy Access Network Information (PANI) and identifies 5G information after receiving SIP INVITE message. The calling P-CSCF applies for call resources to a Policy Control Function network element (PCF) (media negotiation is performed in subsequent step 105), and triggers an Answer-Auth-Request (AAR)/Answer-authentication response (AAA) procedure from the P-CSCF to the PCF.

Step 103: PCF and SMF/AMF interactively complete voice special bearing establishment and user position reporting, and mainly comprises the following contents from C-1 to C-9:

c-1: the PCF calls an Npcf _ SMPolicyControl _ UpdateNotify service operation (Npcf _ SMPolicyControl _ UpdateNotify service operation) of the SMF to inform the SMF to create a voice special QoS Flow; wherein, npcf _ SMPolicyControl _ UpdateNotify is a message name;

c-2: the SMF calls a Namf _ Communication _ N1N2MessageTransfer service operation (Namf _ Communication _ N1N2MessageTransfer service operation) of the AMF, and sends N2 and N1 interface messages to the gNB through the AMF; wherein, namf _ Communication _ N1N2MessageTransfer is the message name;

c-3: the AMF sends a protocol data unit Session Resource modification Request (PDU Session Resource modification Request) message to the gNB, wherein the PDU Session Resource modification Request Transfer (PDU Session Resource modification Request Transfer) element is carried, and is used for the SMF to Request the gNB to establish a voice service quality flow (QoS flow) Resource, and the carried NAS-PDU element is used for transmitting an N1 interface NAS message sent by the SMF to the UE;

the gNB and the UE perform a Radio Resource Control (RRC) connection reconfiguration process, allocate resources related to a voice-over-dedicated QoS Flow on an air interface, and return a protocol data unit Session Resource modification Response (PDU Session Resource modification Response) message, wherein the PDU Session Resource modification Response Transfer (PDU Session Resource modification Response) cell is carried and used as a Response of the gNB to the SMF.

C-4: the AMF calls the Nsmf _ PDSUSession _ UpdateSMContext service operation of the SMF, and sends information contained in a PDU Session Resource Modify Response cell in a PDU Session Resource Modify Response message returned by the gNB to the SMF.

C-5: and the gNB sends a protocol data unit Session Modification Command (PDU Session Modification Command) message carried in the NAS-PDU cell in C-3 to the UE, the UE establishes a voice special QoS Flow and returns an NAS message to the SMF, namely the protocol data unit Session Modification Command completion (PDU Session Modification Command) message, and the NAS message is sent to the SMF through a Direct Transfer (Direct Transfer) message sent by the UE to the gNB.

C-6: the gbb sends UPLINK non-access stratum TRANSPORT (UPLINK NAS TRANSPORT message) to the AMF, where the UPLINK NAS TRANSPORT message carries the NAS message (i.e. PDU Session Modification Command Complete) sent by the UE to the SMF.

C-7: AMF calls the SMF Nsmf _ PDUSESION _ UpdateSMContext service operation, and sends the PDU Session Modification Command Complete message returned by UE to SMF.

C-8: and the SMF sends an N4 Session Modification Request message to the UPF, and requests the UPF to establish the voice special QoS Flow related resources. The UPF returns an N4 Session Modification Response message.

C-9: the SMF calls an Npcf _ SMPolicyControl _ update service operation (Npcf _ SMPolicyControl _ update service operation) of the PCF, and the message carries information such as a radio access technology Type (RAT-Type).

Step 104: PCF sends Re-authentication Request (Re-Auth-Request, RAR) message to report user location information, P-CSCF returns Re-authentication response (Re-Auth-Answer, RAA); after receiving the RAR, the P-CSCF extracts the position information according to the 3gpp user position information attribute value pair (3 gpp UserLocationInfo AVP), updates the position information to a PANI header domain, and adds a network-specific (network-provided) parameter.

Step 105: and after the P-CSCF processes the position information, the invitation message is forwarded to a service call session control function network element (S-CSCF). And after receiving the SIP INVITE message, the S-CSCF analyzes PANI and identifies 5G information. The S-CSCF then triggers a corresponding multimedia telephone application server (MMTel AS) and continues the subsequent process, and the subsequent process is continued to the called network to complete the answering and releasing of the subsequent call.

As shown in fig. 2, the VoNR call receiving process in the prior art includes the following steps 201 to 205:

step 201: after receiving the initial Session invitation Request, the called side inquires a Call Control Function entity (I-CSCF), sends a Location-info-Request (LIR) Request to a UDM/Home Subscriber Server (HSS), and acquires an S-CSCF address registered by the called user.

Step 202: the UDM/HSS sends a Location-info-Response (LIA) to the I-CSCF, and the message carries the address of the S-CSCF providing service for the called user.

Step 203: and the called side I-CSCF routes the message to the S-CSCF according to the S-CSCF address returned by the UDM/HSS.

Step 204: the S-CSCF receives the SIP INVITE message, judges that the called user is registered, and then triggers a corresponding Telecommunication Application Server (TAS) according to an Initial Filter Criteria (iFC) template signed by the called user.

Step 205: after receiving SIP INVITE message, TAS determines that the User has IMS registration, and then starts the called domain selection process, i.e. sends User Data Request (UDR) to UDM.

Step 206: after receiving a User Data Answer (UDA) returned by a Unified Data Management element (UDM)/HSS, a Service Centralization and Continuity Application Server (SCC AS) considers that a User is connected in the IMS domain if a returned RAT type value is 1006 (NG RAN).

Step 207 to step 208: the TAS obtains location information.

Step 209: the TAS returns SIP INVITE information, the S-CSCF inquires the locally stored P-CSCF address registered by the called user, the information is routed to the P-CSCF, and the P-CSCF routes the information to the UPF.

Step 210: if the UE is in an idle state, the 5GC starts a paging (paging) procedure. After the Paging Flow, the UE recovers the QoS Flow between the UE and the UPF through the service request, and the process is the same as the service request process in the calling Flow.

Wherein the Paging process mainly comprises D-1 to D-4 in the following steps:

d-1: the UPF notifies the SMF that there is downlink Data to be transmitted through a Data Notification (Data Notification) message.

D-2: the SMF calls Namf _ Communication _ N1N2MessageTransfer service operation of the AMF to request to activate the user plane resource of PDU Session.

D-3: the SMF discovers that the UE is in a connection management-IDLE (CM _ IDLE) state, and sends a Paging message to the gNB. The gNB pages the UE over the air.

D-4: the UE responds to Paging through the Service Request procedure, and the specific processing procedure is the same as that of the calling procedure, which is not described herein again.

Step 211: the UPF passes the SIP INVITE message through to the UE.

Step 212: after receiving the 183 message (183 Session Progress, indicating that the call is in connection), "the P-CSCF parses out the PANI and identifies the 5G information, wherein if the Rx policy configures the media Rx, the AAR/AAA process from the P-CSCF to the PCF is triggered. Wherein Rx is an interface between the 5G core network PCF and the IMS.

Steps 213 to 214: the P-CSCF initiates AAR/AAA interaction to the PCF, and in the AAA message, the PCF carries the information of the access network Type of the UE through an IP-based access network connectivity (IP-CAN-Type) and a radio access technology Type attribute value pair (RAT-Type AVP). The PCF then notifies 5GC to perform dedicated QoS Flow setup for the media and user location reporting.

Steps 215 to 216: after receiving the RAR, the P-CSCF extracts the position information according to the 3 gppUSKUserLocationInfo AVP, updates the position information to a PANI header field, adds a network-provided parameter and forwards a '183 message' to the S-CSCF. After receiving SIP message, S-CSCF analyzes PANI, identifies 5G information and forwards to TAS, TAS needs to support to analyze PANI and identify 5G information therein.

And (3) a subsequent flow: TAS transfers '183 message' to S-CSCF, S-CSCF transfers message to calling network to complete subsequent media negotiation, ringing connection and disconnection processing.

In addition, PRACK and 200PRACK in fig. 2 are temporary response messages in the SIP paging procedure; and 200 (SIP INVITE) in fig. 2 is response to SIP INVITE in step 102 in fig. 1, indicating that the called party goes off hook, and the calling party returns ACK after receiving 200 (SIP INVITE); BYE in fig. 2 indicates that the terminal is hung up, and BYE 200 is a response to BYE.

Fig. 3 is a flowchart illustrating a call service processing method according to an embodiment of the present application. The method is applied to a session management function network element (SMF), and as shown in fig. 3, the method may include the following steps 301 to 303:

step 301: a first cell in which the terminal device is located is determined.

or

That is, in the embodiment of the present application, when the terminal device moves to the first cell or the terminal device accesses the first cell, the establishment of a tunnel for transmitting a quality of service flow of voice data for the terminal device may be triggered, that is, the establishment of a dedicated 15 qi =1 load may be performed, so as to implement resource reservation for the terminal device.

Step 302: and acquiring a predetermined first user plane function network element corresponding to the first cell under the condition that the terminal equipment has signed a fast call service and the first cell supports the fast call service.

In the embodiment of the present application, a corresponding UPF is configured in advance for a cell supporting a quick call service, so that when a terminal device subscribed with a quick call service is in the cell supporting the quick call service, the SMF may obtain the UPF corresponding to the cell, and further the SMF interacts with the UPF to establish a tunnel for transmitting a quality of service flow of voice data for the terminal device.

Therefore, in the embodiment of the present application, a second list (also referred to as a fastVoNR UPF information table) may be newly added to the SMF, so that the SMF selects the first user plane function network element (i.e., fastVoNR UPF) according to the Tracking Area Code (TAC) of the terminal. That is, the TAC of the cell where the terminal device is located is referred to in the query of the fastvorr UPF information table, and the queried N4 address of the fastvorr UPF is shown in table 1, for example.

TABLE 1 FastVoNR UPF information Table

fastVoNR UPF	TAC
		10.183.1.2	00111d,00111e
10.183.5.6	00111f

Step 303: and interacting with the first user plane function network element to establish a first tunnel for the terminal equipment.

The first tunnel is a tunnel used for transmitting a quality of service Flow of voice data, that is, the first tunnel is a QoS Flow tunnel of 5qi = 1.

In addition, it should be noted that when two terminal devices which have signed up for the fast call service are both in a cell supporting the fast call service, dialing the VoNR can be connected only by performing SIP signaling connection to complete media negotiation, and the dedicated load of 5qi =1 is not deleted when hanging up the call;

when one terminal device which has signed a fast call service is in a cell supporting the fast call service and the other terminal device which has signed the fast call service is not in the cell supporting the fast call service, dialing VoNR requires establishing a special load of 5QI =1 for the terminal device which is not in the cell supporting the fast call service, and deleting the special load of 5QI =1 for the terminal device which is not in the cell supporting the fast call service when hanging up;

when one terminal device which has signed a fast call service is in a cell supporting the fast call service and the other terminal device has not signed the fast call service, dialing the VoNR requires establishing a special load of 5QI =1 for the terminal device which has not signed the fast call service, and deleting the special load of 5QI =1 for the terminal device which has not signed the fast call service when the VoNR is hung up.

And when the two terminal devices are not in the cell supporting the quick call service or are not signed with the quick call service, executing according to the VoNR process in the prior art.

As can be seen from steps 301 to 303 above, in the embodiment of the present invention, a cell capable of supporting a fast call service is configured in advance, and a terminal device signs a fast call service in advance, so that when a terminal device that has signed a fast call service is in the cell that supports the fast call service, a tunnel for transmitting a quality of service flow of voice data may be established in advance for the mobile terminal (i.e., an exclusive load of 5qi =1 is established), that is, an exclusive load of 5qi =1 is established in advance before the terminal device is called or the terminal device initiates a call, thereby implementing resource reservation between a calling party and a called party. Thus, when dialing the VoNR, since the 5qi =1 exclusive load is established in advance, the calling and called terminals only need to interact with the SIP signaling, so that the on-delay of the VoNR can be shortened.

detecting whether the session management subscription data carries preset indication information or not to obtain a detection result;

In the embodiment of the present application, when the terminal device accesses the cell and establishes a PDU Session, the SMF requests the UDM for Session management subscription data (sessionmanagementsubscription data) of the user. According to the 29503 protocol, the sessionmanagementSubscriptionData includes a sub-cell Data network name structure (dnnConfigurations), a new sub-cell is added in the DnnConfiguration: fast call (fastVoNR) as preset indication information for indicating whether the terminal device supports the fast call service. Thus, when the terminal equipment accesses a cell and the SMF asks for the session subscription management data of the user from the UDM through the service message { apiRoot }/numm-sdm/v 1/{ sui }/sm-data, the UDM returns the newly added fastVoNR subscription data (namely the preset indication information indicating whether the terminal equipment has subscribed the quick call service) together.

Optionally, the determining, according to the detection result and the value of the first indication information, whether the terminal device signs a short call service includes:

determining that the terminal device has signed a quick call service when the detection result indicates that the session management subscription data includes the first indication information and the first indication information is a first preset value;

and determining that the terminal device is not signing the quick call service under the condition that the detection result indicates that the session management signing data does not include the first indication information, or the detection result indicates that the session management signing data includes the first indication information, and the first indication information is a second preset value.

Wherein the new sub-cell in the DnConfiguration: fastVoNR, as shown in tables 2 and 3, such that depending on whether a sub-cell is included in the DnnConfiguration: the fastVoNR and the specific value of the fastVoNR can determine whether the terminal device signs a fast call service.

TABLE 2 Dnnconfiguration New increasing sub-cell fastVoNR

TABLE 3 simple data types for FastVoNR

Name of type	Type definition	Description of the invention
			FastVoNR	Boolean value	Indicating whether to support a quick call service

Optionally, before the predetermined first user plane function network element corresponding to the first cell is obtained, the method further includes:

When the terminal equipment accesses the cell, two PDU sessions are generally established. One PDU Session is 5qi =9 (for example, DNN is china mobile internet (CMNET)), the other PDU Session is 5qi =5, and DNN is IMS. In the embodiment of the present application, a first list (may also be referred to as a fastVoNR region table) may be configured for a PDU Session of the IMS for the DNN, so that a tracking region list (TAC list) may be matched according to parameter information of two PDU sessions established by the terminal device.

In addition, the target parameter Information may include Data Network Name (DNN) Information, public Land Mobile Network (PLMN) Information, and Single Network Slice Selection Assistance Information (S-NSSAI) Information, the PLMN Information including Mobile Country Code (MCC) and Mobile Network Code (MNC), and the S-NSSAI Information including Slice/service type (sst) and Slice discriminator (sd).

As can be seen from the above description, in the embodiment of the present application, a fastVoNR area table may be newly added in the SMF, where the table indicates TAC areas supporting the quick call service under the specified DNN, PLMN, and S-NSSAI conditions. The TAC area is represented by a TAC list (i.e., TAC list). Optionally, the maximum number of TACs in the TAC list is 16. It is understood that the maximum number of TACs in the TAC list may also be adjusted according to actual requirements. The fastVoNR region table is shown in table 4, for example.

TABLE 4 FastVoNR regions Table

DNN	MCC	MNC	sst	sd	TAC list
						IMS	460	00	01	000001	00111d,00111e,00111f,…
IMS	460	01	01	000001	00222e,00942a,31933a,…

The SMF queries the fastVoNR region table according to DNN information, PLMN information (i.e., MCC and MNC), and snasai information (i.e., sst and sd) of all the established PDU sessions of the terminal device, where the query result includes the following scenarios:

scene one: the terminal equipment does not sign a fastVoNR function (namely, a quick call service), the SMF does not inquire a fastVoNR area table, and the SMF keeps the existing realization of carrying out subsequent processing;

scene two: the terminal equipment has signed a fastVoNR function, the SMF does not inquire the DNN information of the PDU Session established by the terminal equipment, the PLMN information (namely MCC and MNC) and the TAC list corresponding to the Snssai information (namely sst and sd) in a fastVoNR area table, and the SMF keeps the existing realization to carry out subsequent processing;

scene three: the terminal equipment has signed a fastVoNR function, the SMF queries a fastVoNR area table to obtain a TAC list, but the TAC of the terminal equipment is not in the TAC list, and the SMF keeps the existing realization to carry out subsequent processing;

scene four: after the terminal device has signed a fastVoNR function, the SMF queries a fastVoNR region table to obtain a TAC list, and if the TAC of the terminal device is in the TAC list, resources are reserved for the terminal device according to the call service processing method of the embodiment of the present application (i.e., a dedicated load of 5qi =1 is established).

As can be seen from the above description, in the embodiment of the present application, when a terminal device has subscribed to a fast call service and a first cell in which the terminal device is currently located supports the fast call service, a first user plane function network element (fastvorr UPF) is inserted into a service plane path of the terminal device, and a QoS Flow of 5qi =1 is additionally and fixedly established for the terminal device on the fastvorr UPF when the fastvorr UPF is inserted, so that the QoS Flow of 5qi =1 of the terminal device walks the service plane path of a first base station-fastvorr UPF-IP Multimedia Subsystem (IMS).

The SMF can send the identification information of the N3 endpoint of the first base station to the fastVoNR UPF through the N4 Session Modification flow; the identification information of the N3 endpoint of the fastvorr UPF is transmitted to the AMF through a naf _ Communication _ N1N2Message Transfer Request Message, and then the AMF transmits the identification information of the N3 endpoint of the fastvorr UPF to the first base station.

In addition, the identification information of the endpoint may include an IP address and a tunnel number of the endpoint.

Optionally, the method further includes:

interacting with a core user plane functional network element and the first user plane functional network element under the condition that the terminal equipment has signed a fast call service and the first cell supports the fast call service, moving a second tunnel from the core user plane functional network element to the first user plane functional network element,

wherein the second tunnel is a tunnel for transmitting a quality of service Flow of Session Initiation Protocol (SIP) signaling (i.e., the second tunnel is a QoS Flow tunnel of 5qi = 5).

In addition, since a tunnel of QoS Flow of 5qi =5 is used for transmitting SIP signaling, after a dedicated bearer of 5qi =1 is established on the fastvornr UPF, the tunnel of QoS Flow of 5qi =5 on the core user plane function network element (UPF 0) may be transferred to the fastvornr UPF, thereby avoiding the VoNR session from occupying resources of UPF 0.

sending third indication information to the core user plane function network element, wherein the third indication information is used for indicating to delete the N3 endpoint and the N6 endpoint of the second tunnel on the core user plane function network element;

From this, it is found that moving a QoS Flow tunnel of 5qi =5 from UPF0 to fastvorr UPF requires deleting N3 end point and N6 end point of the QoS Flow tunnel of 5qi =5 on UPF0, and thus deleting the QoS Flow tunnel of 5qi =5 on UPF 0. In addition, it is also necessary to establish an N3 endpoint and an N6 endpoint of a tunnel for QoS Flow of 5qi =5 on the fastvorr UPF, and establish a connection between the N3 endpoint of the tunnel for QoS Flow of 5qi =5 and the N3 endpoint of the first base station on the fastvorr UPF, and a connection between the N6 endpoint of the tunnel for QoS Flow of 5qi =5 and the IMS on the fastvorr UPF. In this way, the QoS Flow of terminal device 5qi =5 walks the service plane path of the first base station-fastVoNR UPF-IP Multimedia Subsystem (IMS).

Optionally, when the terminal device has signed a fast call service and the first cell supports the fast call service, interacting with a core user plane functional network element and the first user plane functional network element, and inserting the first user plane functional network element into a third tunnel;

In addition, the third tunnel includes a tunnel of QoS Flow except for 5qi =9 and 5qi =1, 5qi =2, 5qi = 5.

As can be seen from the above, after inserting the fastVoNR UPF into the service plane path of the terminal device, the adjustment may be performed with respect to the third tunnel, that is, the fastVoNR UPF is inserted into the third tunnel.

Optionally, the interacting with the core user plane function network element and the first user plane function network element, and inserting the first user plane function network element into a third tunnel includes:

Therefore, when the fastVoNR UPF is inserted into the third tunnel, the N3 endpoint of the third tunnel on the UPF0 needs to be deleted, so that the N3 endpoint of the third tunnel on the UPF0 is disconnected from the N3 endpoint of the first base station. In addition, it is also necessary to establish an N9 endpoint of the third tunnel on the UPF0, an N3 endpoint and an N9 endpoint of the third tunnel on the fastvorr UPF, a connection between the N3 endpoint of the third tunnel on the fastvorr UPF and the N3 endpoint of the first base station, and a connection between the N9 endpoint of the third tunnel on the fastvorr UPF and the N9 endpoint of the third tunnel on the UPF 0. In this way, the third tunnel of the terminal device takes the traffic plane path of the first base station, fastVoNR UPF-UPF 0-DN.

Optionally, the method further includes:

Therefore, in the embodiment of the present application, after the terminal device that has subscribed to the fast call service moves out of the cell supporting the fast call service, the fastvorr UPF may be deleted, that is, the endpoint of the tunnel established on the fastvorr UPF is deleted.

As can be seen from the above, in the case that an N9 endpoint of a third tunnel is established on the core user plane function network element (i.e. in the case that fastVoNR UPF is inserted into the third tunnel), if the terminal device moves from the first cell supporting the fast call service to the second cell not supporting the fast call service, the third tunnel needs to be recovered, that is, the N9 endpoint of the third tunnel on UPF0 is deleted, an upn 3 endpoint is established, a connection between the N3 endpoint of the third tunnel on UPF0 and the N3 endpoint of the second base station to which the second cell belongs is established, and a connection between the N6 endpoint of the third tunnel on UPF0 and the DN.

If the N3 endpoint and the N6 endpoint of the second tunnel are not present on the network element of the core user plane function (i.e. if the tunnel of QoS Flow of 5qi =5 is moved to fastvorn UPF), if the terminal device moves from the first cell supporting the quick call service to the second cell not supporting the quick call service, it is further required to restore the tunnel of QoS Flow of 5qi =5 on UPF0, i.e. to re-establish the N3 endpoint and the N6 endpoint of the tunnel of QoS Flow of 5qi =5 on UPF0, and respectively establish a connection between the N3 endpoint of the tunnel of QoS Flow of 5qi =5 and the N3 endpoint of the second base station to which the second cell belongs, and a connection between the N6 endpoint of the tunnel of QoS Flow of 5qi =5 and IMS.

When the terminal device moves from a first cell supporting the quick call service to a second cell not supporting the quick call service and the second cell has an edge calculation application, a UPF for edge calculation needs to be inserted again for the terminal device.

Optionally, the method further includes:

and when the terminal device has signed a quick call service and the first cell supports the quick call service, interacting with a policy control function network element (PCF) to acquire policy and charging control rule information of the first tunnel, wherein the policy and charging control rule information (PCC rule) of the first tunnel includes flow description information (FlowDescription), and the configuration of the flow description information in the policy control function network element is the same as the configuration of the flow description information in the IP multimedia subsystem.

Therefore, when the terminal device has subscribed to the quick call service and the cell where the terminal device is located supports the quick call service, the SMF may interact with the PCF to obtain a PCC rule of 5qi =1, where FlowDescription in the PCC rule needs to be agreed with the IMS in advance.

sending ninth indication information to the policy control function network element, where the ninth indication information is used to indicate that the terminal device has signed a fast call service, and the first cell supports the fast call service;

Therefore, when the terminal device has signed up for the quick call service and the cell in which the terminal device is located supports the quick call service, the SMF sends the ninth indication information to the PCF to notify that the terminal device has signed up for the quick call service and that the cell in which the terminal device is located supports the quick call service, so that the PCF returns the PCC rule of 5qi =1 to the SMF.

After knowing the TAC of the terminal device, the SMF may send an Npcf _ SMPolicyControl _ Update request message to the PCF, where a policy control request trigger (policycontrorrequesttrigger) is carried as a service area change (SAREA _ CH). Based on this, a cell may be added to the Npcf _ SMPolicyControl _ Update request message to be used for transferring the terminal device signed fast call service (i.e. supporting the fastVoNR function), and the TAC where the terminal device is currently located supports the fast call service, that is, a cell fastVoNR as shown in table 5 below is added to the SMPolicyControl _ Update data message.

TABLE 5SmPolicyUpdateContextData newly added cell fastVoNR

Therefore, when the terminal device moves from the first cell supporting the quick call service to the second cell not supporting the quick call service, the PCC rule of 5qi =1 may be deleted.

Optionally, the method further includes:

It can be seen that, in the embodiment of the present application, in the case that the edge calculation application exists in the first cell, a tunnel for carrying QoS Flow of edge calculation data may be established on the fastVoNR UPF.

As can be seen from the above, when a tunnel for carrying QoS Flow of edge calculation data is established on the fastVoNR UPF, it is necessary to establish an N3 endpoint and an N6 endpoint of the fourth tunnel on the fastVoNR UPF, and establish a connection between the N3 endpoint of the fourth tunnel on the fastVoNR UPF and the N3 endpoint of the first base station to which the first cell belongs, and a connection between the N6 endpoint of the fourth tunnel on the fastVoNR UPF and the edge calculation server, so that the QoS Flow calculated by the edge takes a service plane path of "the first base station-fastVoNR UPF-edge calculation server".

Fig. 4 is a flowchart illustrating a call service processing method according to an embodiment of the present application. The method is applied to a first user plane function network element (fastVoNR UPF), as shown in fig. 4, the method may include the following steps 401:

step 401: under the condition that terminal equipment has signed a rapid calling service and a first cell where the terminal equipment is located supports the rapid calling service, interacting with a session management function network element to establish a first tunnel for the terminal equipment;

the first user plane functional network element is a predetermined user plane functional network element corresponding to the first cell, and the first tunnel is a tunnel used for transmitting a quality of service Flow of voice data, that is, the first tunnel is a QoS Flow tunnel of 5qi = 1.

In the embodiment of the present application, a corresponding UPF is configured in advance for a cell supporting a quick call service, so that when a terminal device subscribed with a quick call service is in the cell supporting the quick call service, an SMF may obtain the UPF (i.e., fastVoNR UPF) corresponding to the cell, and then the SMF interacts with the fastVoNR UPF to establish a QoS Flow tunnel of 5qi =1 for the terminal device. Namely, before the terminal device is called or the terminal device initiates a call, a dedicated load of 5qi =1 is established in advance, and resource reservation between a calling party and a called party is realized. Thus, when dialing the VoNR, since the 5qi =1 exclusive load is established in advance, the calling and called terminals only need to interact with the SIP signaling, so that the on-delay of the VoNR can be shortened.

and according to the first indication information and the identification information of the N3 endpoint of the first base station, establishing an N3 endpoint and an N6 endpoint of the first tunnel on the first user plane function network element, and establishing a connection between the N3 endpoint of the first tunnel and the N3 endpoint of the first base station on the first user plane function network element, and a connection between the N6 endpoint of the first tunnel and an IP multimedia subsystem on the first user plane function network element.

The SMF may send the identification information of the N3 endpoint of the first base station to the fastVoNR UPF through an N4 Session Modification procedure.

Optionally, the method further includes:

In addition, the tunnel of QoS Flow of 5qi =5 is used for transmitting SIP signaling, so after the dedicated load of 5qi =1 is established on the fastVoNR UPF, the tunnel of QoS Flow of 5qi =5 on the core user plane functional network element (UPF 0) can be transferred to the fastVoNR UPF, thereby avoiding the VoNR session occupying the resource of UPF 0.

Further, in the embodiment of the present application, moving the tunnel of QoS Flow of 5qi =5 from UPF0 to fastvorr UPF requires deleting the N3 end point and the N6 end point of the tunnel of QoS Flow of 5qi =5 on UPF0, and thus the tunnel of QoS Flow of 5qi =5 on UPF0 is deleted. In addition, it is also necessary to establish an N3 endpoint and an N6 endpoint of a tunnel for QoS Flow of 5qi =5 on the fastvorr UPF, and establish a connection between the N3 endpoint of the tunnel for QoS Flow of 5qi =5 and the N3 endpoint of the first base station on the fastvorr UPF, and a connection between the N6 endpoint of the tunnel for QoS Flow of 5qi =5 and the IMS on the fastvorr UPF. Thus, the QoS Flow of terminal device 5qi =5 walks the first base station-fastVoNR UPF-IP Multimedia Subsystem (IMS) traffic plane path.

Optionally, the method further includes:

receiving sixth indication information sent by the session management function network element under the condition that the terminal device has signed a fast call service and the first cell supports the fast call service;

according to the sixth indication information, establishing an N3 endpoint and an N9 endpoint of a third tunnel on the first user plane function network element, and establishing a connection between the N3 endpoint of the third tunnel on the first user plane function network element and the N3 endpoint of the first base station to which the first cell belongs, and a connection between the N9 endpoint of the third tunnel on the first user plane function network element and the N9 endpoint of the third tunnel on a core user plane function network element;

In addition, the third tunnel includes a tunnel of QoS Flow other than 5qi =1, 5qi =2, and 5qi =5 and 5qi =9.

And inserting the fastVoNR UPF into the third tunnel, wherein the N3 endpoint of the third tunnel on the UPF0 needs to be deleted, so that the N3 endpoint of the third tunnel on the UPF0 is disconnected from the N3 endpoint of the first base station. In addition, it is also necessary to establish an N9 endpoint of the third tunnel on the UPF0, an N3 endpoint and an N9 endpoint of the third tunnel on the fastvorr UPF, a connection between the N3 endpoint of the third tunnel on the fastvorr UPF and the N3 endpoint of the first base station, and a connection between the N9 endpoint of the third tunnel on the fastvorr UPF and the N9 endpoint of the third tunnel on the UPF 0. In this way, the third tunnel of the terminal device takes the traffic plane path of the first base station, fastVoNR UPF-UPF 0-DN.

Optionally, the method further includes:

Therefore, in the embodiment of the present application, after the terminal device that has subscribed to the fast call service moves out of the cell supporting the fast call service, the fastVoNR UPF may be deleted, that is, the end point of the tunnel that has been established on the fastVoNR UPF may be deleted.

Optionally, the method further includes:

optionally, according to the eleventh indication information, an N3 endpoint and an N6 endpoint of the fourth tunnel are established on the first user plane function network element, and a connection between the N3 endpoint of the fourth tunnel on the first user plane function network element and the N3 endpoint of the first base station to which the first cell belongs is established, and a connection between the N6 endpoint of the fourth tunnel on the first user plane function network element and an edge computing server are established.

Fig. 5 is a flowchart illustrating a call service processing method according to an embodiment of the present application. The method is applied to a core user plane function network element (UPF 0), and as shown in fig. 5, the method may include the following steps 501 to 501:

step 501: and receiving third indication information sent by a session management function network element under the condition that a terminal device has signed a fast call service, a first cell in which the terminal device is located supports the fast call service, and a first tunnel is established for the terminal device on a first user plane function network element.

Step 502: and deleting the N3 endpoint and the N6 endpoint of the second tunnel on the core user plane function network element according to the third indication information.

The first user plane functional network element is a predetermined user plane functional network element corresponding to the first cell, the first tunnel is a tunnel for transmitting a quality of service Flow of voice data (i.e., a tunnel for QoS Flow of 5qi = 1), and the second tunnel is a tunnel for transmitting a quality of service Flow of session initiation protocol signaling (i.e., a tunnel for QoS Flow of 5qi = 5).

In the embodiment of the present application, when a terminal device has subscribed to a fast call service and a first cell in which the terminal device is currently located supports the fast call service, a first user plane functional network element (fastvorr UPF) may be inserted into a service plane path of the terminal device, and a QoS Flow of 5qi =1 is additionally and fixedly established for the terminal device on the fastvorr UPF during insertion, so that the QoS Flow of 5qi =1 of the terminal device walks the service plane path of a first base station-fastvorr UPF-IP Multimedia Subsystem (IMS).

Since the tunnel of QoS Flow of 5qi =5 is used for transmitting SIP signaling, after the dedicated load of 5qi =1 is established on the fastVoNR UPF, the tunnel of QoS Flow of 5qi =5 on the core user plane functional network element (UPF 0) may be transferred to the fastVoNR UPF, thereby avoiding the VoNR session occupying the resource of UPF 0. Therefore, in the case where the terminal device has subscribed to the quick call service, the first cell supports the quick call service, and a first tunnel is established for the terminal device on the first user plane function network element, the SMF may send the third indication information to the UPF0, so that the UPF0 deletes the N3 endpoint and the N6 endpoint of the tunnel of the QoS Flow of 5qi =5 on the UPF0, and thus, the tunnel of the QoS Flow of 5qi =5 on the UPF0 is deleted.

Optionally, the method further includes:

From this, it can be seen that, when the terminal device moves from the first cell supporting the quick call service to the second cell not supporting the quick call service, it is necessary to restore the tunnel of QoS Flow of 5qi =5 on the UPF0, that is, to newly establish the N3 endpoint and the N6 endpoint of the tunnel of QoS Flow of 5qi =5 on the UPF0, and to establish a connection between the N3 endpoint of the tunnel of QoS Flow of 5qi =5 and the N3 endpoint of the second base station to which the second cell belongs, and a connection between the N6 endpoint of the tunnel of QoS Flow of 5qi =5 and the IMS, respectively.

Optionally, the method further includes:

In addition, after inserting the fastvorr UPF into the service plane path of the terminal device, adjustment may be performed with respect to the third tunnel, that is, the fastvorr UPF is inserted into the third tunnel. In this way, the N3 endpoint of the third tunnel in the UPF0 needs to be deleted, so that the N3 endpoint of the third tunnel in the UPF0 is disconnected from the N3 endpoint of the first base station. In addition, it is also necessary to establish an N9 endpoint of the third tunnel on the UPF0, an N3 endpoint and an N9 endpoint of the third tunnel on the fastvorr UPF, a connection between the N3 endpoint of the third tunnel on the fastvorr UPF and the N3 endpoint of the first base station, and a connection between the N9 endpoint of the third tunnel on the fastvorr UPF and the N9 endpoint of the third tunnel on the UPF 0. In this way, the third tunnel of the terminal device walks along the service plane path of the first base station, fastVoNR UPF-UPF 0-Data Network (DN).

Optionally, the method further includes:

Therefore, if the terminal device moves from the first cell supporting the quick call service to the second cell not supporting the quick call service, it needs to recover the third tunnel, that is, delete the N9 endpoint of the third tunnel on the UPF0, establish the N3 endpoint, and establish the connection between the N3 endpoint of the third tunnel on the UPF0 and the N3 endpoint of the second base station to which the second cell belongs, and the connection between the N6 endpoint of the third tunnel on the UPF0 and the DN.

To sum up, the specific implementation of the call service processing method provided in the embodiment of the present application may be as follows:

the first implementation mode comprises the following steps: the terminal equipment moves into a cell supporting the quick call service to trigger resource reservation.

As shown in fig. 6, the terminal device accesses and establishes two PDU sessions. One PDU Session 5QI =9 (for example, DNN is cmnet), the other PDU Session 5QI =5, DNN is IMS. The service plane uses UPF0 as anchor point. When a PDU Session of the IMS is established, if a fastVoNR cell carried by Session management subscription data acquired by the SMF from the UDM is true (that is, 1), it indicates that the terminal device subscribes to a fast call service.

After that, the terminal device moves into a new TAC region (the TAC region supports a fast call service), and triggers the base station to initiate an XN handover or a location reporting procedure, so that the AMF notifies the SMF of the latest TAC of the terminal device through an Update Session Management Context (Update Session Management Context) service message.

Then, the SMF queries the fastVoNR region table pre-stored therein according to the DNN information, PLMN information (i.e. MCC and MNC), and snasai information (i.e. sst and sd) of all the PDU sessions established by the terminal, for example, it is found that the DNN: IMS, PLMN:46000, snssai: 5363 and obtaining the corresponding TAC list according to the record of 01,000001, and comparing to obtain the latest TAC in the TAC list of the terminal device.

Then, the SMF sends an Npcf _ SMPolicyControl _ Update request message to the PCF, wherein the PolicyControlRequestTrigger is carried as SAREA _ CH, and the fastVoNR cell is tube. Wherein, the fact that the fastVoNR cell is tube indicates that the terminal device has signed a fast call service, and the cell where the terminal device is located supports the fast call service.

Then, after receiving the Npcf _ SMPolicyControl _ Update request message, the PCF updates the Policy and Charging Control (PCC) Policy according to the current latest TAC of the terminal device. Wherein, if the current TAC still has an edge calculation application, the PCF needs to update the PCC policy of the edge calculation.

In addition, PCF knows that terminal device has signed up fast call service for the future through fastvorr cell, and the cell where terminal device is located supports fast call service, then newly inserts a PCC rule of 5qi =1 for IMS PDU Session. The FlowDescription in the PCC rule of 5qi =1 needs to be agreed with IMS in advance, so as to ensure that the voice data on the 5qi =1 can be transmitted uplink and downlink along the service path of "base station-fastVoNR UPF-IMS".

Then, after receiving the Npcf _ SMPolicyControl _ Update response message sent by the PCF, the SMF selects a fastVoNR UPF from the fastVoNR UPF information table according to the TAC of the terminal device.

Next, the SMF sends an N4 Session Modification Request message to the UPF0 to delete the N3 end point and the N6 end point of the tunnel of the 5qi =5QoS Flow in the UPF0, delete the N3 end point of the tunnel of the 5qi =9 and other QoS flows (i.e., qoS flows except for the 5qi = =1, the 5qi = =2, and the 5qi = =5) in the UPF0, and establish the N9 end point of the tunnel of the 5qi = =9 and other QoS flows on the UPF 0.

Next, the SMF sends an N4 Session Establishment Request (N4 Session Establishment Request) message to the fastVoNR UPF to complete the Establishment of the following tunnel:

establishing an N3 endpoint and an N6 endpoint of a tunnel of QoS Flow of 5QI =1 on the fastVoNR UPF, establishing a connection between the N3 endpoint of the tunnel of QoS Flow of 5QI =1 on the fastVoNR UPF and the N3 endpoint of the base station, and establishing a connection between the N6 endpoint of the tunnel of QoS Flow of 5QI =1 on the fastVoNR UPF and the IMS;

establishing an N3 endpoint and an N6 endpoint of a tunnel of QoS Flow of 5QI =5 on the fastVoNR UPF, establishing a connection between the N3 endpoint of the tunnel of QoS Flow of 5QI =5 on the fastVoNR UPF and the N3 endpoint of the base station, and establishing a connection between the N6 endpoint of the tunnel of QoS Flow of 5QI =5 on the fastVoNR UPF and the IMS;

n3 end points and N9 end points of tunnels of 5qi =9 and other QoS flows are established on the fastVoNR UPF.

Next, the SMF sends an N4 Session Modification Request message to the UPF0 to establish a connection between the N9 end point of the tunnel of 5qi =9 and other QoS flows on the UPF0 and the N9 end point of the tunnel of 5qi =9 and other QoS flows of the fastvorr UPF.

A schematic diagram after the tunnel is established may be as shown in fig. 8, so that 5qi =9 of the cmnet session and the other QoS flows go through a traffic plane path of "base station-fastVoNR UPF-UPF 0-DN"; two Qos flows of an IMS session, namely 5qi =5 and 5qi =1, take a service plane path of "base station-fastVoNR UPF-IMS".

In addition, it should be noted that, if the PCC policy returned to the SMF by the PCF in the foregoing process indicates that the TAC where the terminal device is located has an edge calculation application, the edge calculation UPF and the fastvon upnp are integrated, that is, a new QoS Flow needs to be calculated for the edge on the fastvon upnp, where on the fastvon upnp, an N3 endpoint of a tunnel of the QoS Flow is connected to the base station, and an N6 endpoint is connected to the edge calculation server, so that the QoS Flow calculated by the edge walks a service plane path of "base station-fastvon upnp-edge calculation server".

The SMF brings the identification information of the N3 endpoint of the fastVoNR UPF to the base station through a Namf _ Communication _ N1N2Message Transfer Request Message so as to realize the connection between the N3 endpoint of the base station and the fastVoNR UPF; the SMF may bring a protocol data unit Session Modification Command non-access stratum message to the terminal device (PDU Session Modification Command NAS).

The second embodiment: the terminal equipment is directly accessed to the cell supporting the quick call service to trigger resource reservation.

As shown in fig. 7, the terminal device accesses the TAC region supporting the fast call service, and establishes two PDU sessions. One PDU Session 5QI =9 (for example, DNN is cmnet), the other PDU Session 5QI =5, DNN is IMS. The traffic plane uses UPF0 as an anchor point. When a PDU Session of the IMS is established, if a fastVoNR cell carried by Session management subscription data acquired by the SMF from the UDM is true (that is, 1), it indicates that the terminal device subscribes to a fast call service.

Then, the SMF queries the fastvorr area table pre-stored in the SMF according to the DNN information, PLMN information (i.e. MCC and MNC), and snasai information (i.e. sst and sd) of the PDU Session requested to be established by the terminal, for example, it is found that the DNN: IMS, PLMN:46000, snssai: 5363 and acquiring the corresponding TAC list from the record 01,000001, and comparing to obtain that the current TAC of the terminal device is in the TAC list.

Then, the SMF sends an Npcf _ SMPolicyControl _ Create request message to the PCF, where the fastvorr cell is carried as a tube, which indicates that the terminal device has signed a fast call service, and the cell where the terminal device is located supports the fast call service.

Then, after receiving the Npcf _ SMPolicyControl _ Create request message, the PCF issues a PCC policy according to the current TAC of the terminal device, issues a PCC policy of 5qi =9 for DNN cmnet, and issues a PCC policy of 5qi =5 for DNN ims. Wherein, if the current TAC has an edge calculation application, the PCF further needs to issue a PCC policy for edge calculation.

In addition, PCF knows that terminal device has signed up fast call service for the future through fastvorr cell, and the cell where terminal device is located supports fast call service, then newly inserts a PCC rule of 5qi =1 for IMS PDU Session.

And the PCF sends the PCC strategy to the SMF through an Npcf _ SMPolicyControl _ Create response message.

Then, after receiving the Npcf _ SMPolicyControl _ Create response message sent by the PCF, the SMF selects a fastVoNR UPF from the fastVoNR UPF information table according to the TAC of the terminal device.

Next, the SMF sends an N4 Session Establishment Request message to the UPF0 to establish N9 end points and N6 end points of the tunnels of 5qi =9 and other QoS flows (i.e., qoS flows except 5qi =1, 5qi =2, 5qi = =5) on the UPF0, and establishes a connection between the N6 end points and DNs of the tunnels of 5qi =9 and other QoS flows;

then, the SMF sends an N4 Session Establishment Request message to the fastVoNR UPF, which completes the following Establishment:

The schematic diagram after the tunnel is established may be as shown in fig. 8, so that 5qi =9 of the cmnet session and the other QoS flows go through the traffic plane path of "base station-fastVoNR UPF-UPF 0-DN"; two Qos flows of an IMS session, namely 5qi =5 and 5qi =1, take a service plane path of "base station-fastVoNR UPF-IMS".

In summary, after the process of the first embodiment or the second embodiment is executed, the terminal device accesses the TAC region supporting the fast call service, and has already established two PDU sessions. The DNN of one PDU Session is cmnet, and the DNN of the other PDU Session is IMS. Thus, both sessions are first connected to the fastVoNR UPF via the base station, UPF0 serving as an anchor point for the DN. . 5QI =9 of the cmnet session and other QoS flows go to the traffic plane path of 'base station-fastVoNR UPF-UPF 0-DN'; two Qos flows of an IMS session, namely 5qi =5 and 5qi =1, take a service plane path of "base station-fastVoNR UPF-IMS". If the edge computing application exists, the Qos Flow of the edge computing walks the service plane path of 'base station-fastVoNR UPF-edge computing server'.

On the first hand, based on the first or second embodiment, when the terminal device moves out of the TAC region supporting the quick call service, as shown in fig. 9, the following steps H1 to H6 are performed:

step H1: the terminal equipment moves into a new TAC area (the TAC area does not support the quick call service), the base station is triggered to initiate an XN switching or position reporting process, and the AMF informs the SMF of the latest TAC of the terminal equipment through an Update SM Context service message.

Step H2: the SMF queries the fastVoNR region table pre-stored in the SMF according to DNN information, PLMN information (i.e. MCC and MNC), and snasai information (i.e. sst and sd) of all the PDU sessions established by the terminal device, for example, it is found that the DNN: IMS, PLMN:46000, snssai: 5363 and obtaining the corresponding TAC list according to the record of 01,000001, and comparing to know that the current latest TAC of the terminal device is not in the TAC list, the SMF decision needs to delete fastVoNR UPF.

Step H3: the SMF sends an Npcf _ SMPolicyControl _ Update request message to the PCF, the PolicyContyRequestTrigger is carried to SAREA _ CH, and the fastVoNR cell is false.

Step H4: and after receiving the Npcf _ SMPolicyControl _ Update request message, the PCC strategy is updated according to the current latest TAC of the terminal equipment. Wherein, if the current TAC still has an edge calculation application, the PCF needs to update the PCC policy of the edge calculation.

Step H5: the PCF knows that the cell where the terminal device is located does not support the fast call service through the fastvor as false, so the PCF needs to delete the PCC rule of 5qi =1 in the IMS PDU Session, and the PCF issues the PCC policy to the SMF through an Npcf _ SMPolicyControl _ Update response message.

Step H6: the SMF sends an N4 Session Modification Request message to the UPF0, and the following processes are completed:

deleting N9 endpoints of the tunnel of 5qi =9 and other QoS flows (i.e., qoS flows except 5qi =1, 5qi =2, 5qi =5) on the UPF0, establishing N3 endpoints of the tunnel of 5qi =9 and other QoS flows on the UPF0, and establishing a connection between N6 endpoints of the tunnel of 5qi =9 and other QoS flows and DN on the UPF 0;

an N3 endpoint and an N6 endpoint of the Qos Flow of 5QI =5 are established on the UPF0, a connection between the N3 endpoint of the Qos Flow of 5QI =5 on the UPF0 and the base station is established, and a connection between the N6 endpoint of the Qos Flow of 5QI =5 on the UPF0 and the IMS is established.

In addition, it is also necessary to update the N3 tunnel information of the base station to which the TAC region where the terminal device is currently located to all QoS flows on the UPF 0.

To this end, UPF0 begins to act as the only anchor point for both sessions.

Step H7: the SMF brings the N3 information of UPF0 to the base station via a naf _ Communication _ N1N2Message Transfer Request Message.

Step H8: the SMF brings a PDU Session Modification Command NAS message to the terminal equipment.

Step H9: and finally, the SMF sends an N4 Session Deletion Request message to the fastVoNR UPF so as to delete the tunnel on the fastVoNR UPF.

In addition, it should be noted that, if the PCF issues the PCC policy for edge calculation in step H4, after step H9, the SMF further needs to insert an Uplink Classifier (ULCL) anchor point corresponding to the new TAC region, that is, a new UPF is inserted for the service plane path of the terminal to offload the edge calculation service.

In a second aspect, based on the first embodiment or the second embodiment, a subsequent VoNR call flow is shown in fig. 10. The VoNR call flow shown in fig. 10 is different from the VoNR call flow in the prior art shown in fig. 1 in that the establishment of the dedicated bearer of 5qi =1 is omitted in fig. 10 (i.e., the process of step 103 shown in fig. 1 is omitted).

Thus, in fig. 10, after step 101, the terminal device initiates a call, sends SIP INVITE message to the P-CSCF, the calling P-CSCF applies for the session resource to the PCF to send an AAR message, and the PCF replies with an AAA message. The PCF directly sends RAR message to report user location information and the P-CSCF returns response message RAA because the resource reservation is completed in advance. In fig. 10, the flow thereafter is the same as step 105 in fig. 1.

In a third aspect, based on the first or second embodiment, a subsequent VoNR terminating procedure is shown in fig. 11. The VoNR called flow shown in fig. 11 is different from the VoNR called flow in the prior art shown in fig. 2 in that the establishment of a dedicated load of 5qi =1 is omitted in fig. 11.

Therefore, in fig. 11, after receiving the '183 message' of the called terminal device, the P-CSCF applies for the call resource to send the AAR message to the PCF, and the PCF replies with the AAA message. Because the resource reservation is completed in advance, the PCF directly sends an RAR message to report the user location information, and the P-CSCF returns a response message (namely RAA). In fig. 11, the flow thereafter is the same as the flow after step 216 in fig. 2.

In a fourth aspect, based on the first embodiment or the second embodiment, a subsequent VoNR call release process is shown in fig. 12, and specifically includes the following steps 1201 to 1204:

step 1201: and respectively initiating a VoNR call release flow corresponding to the calling side and the called side.

Step 1202: the P-CSCF initiates a voice bearer release flow, sends a Session Termination (STR) request message to the PCF, and releases bearer resources.

The method comprises the following steps: 1203 when the terminal device is in the advanced resource reservation scene (i.e. in the TAC region supporting the fast call service), the PCF does not trigger the QoS Flow deleting 5qi =1, and directly replies a Session Termination Acknowledgement (STA) message to the P-CSCF.

Step 1204: the call release is complete.

To sum up, in the call service processing method of the embodiment of the present application, when the terminal device signs a fast call service and is located in the TAC region supporting the fast call service, dialing a VoNR call requires only SIP signaling connection, so that a VoNR connection delay can be shortened; moreover, a core network fixedly established by 5QI =1QoS Flow is established on fastVoNR UPF, the resource of UPF0 is not occupied, and when terminal equipment dials VoNR, a core network signaling plane cannot be sensed, so that the core network signaling plane expense is saved; in addition, local deployment of the IMS server is supported, so that 5QI =5 and 5QI =1 are connected with the local IMS server through fastVoNR UPF, and therefore high-quality conversation can be carried out between terminal devices subscribing to the quick call service more quickly and freely.

With the above description of the call service processing method provided in the embodiment of the present application, a call service processing apparatus provided in the embodiment of the present application will be described below with reference to the accompanying drawings.

Referring to fig. 13, an embodiment of the present application provides a call service processing apparatus, where the apparatus includes:

a cell determining module 1301, configured to determine a first cell in which the terminal device is located;

a network element determining module 1302, configured to obtain a predetermined first user plane functional network element corresponding to the first cell when the terminal device has signed a fast call service and the first cell supports the fast call service;

a first establishing module 1303, configured to interact with the first user plane function network element, and establish a first tunnel for the terminal device, where the first tunnel is a tunnel used for transmitting a quality of service flow of voice data.

Optionally, the apparatus further comprises:

a first sending module, configured to send a first request message to a unified data management network element, where the first request message is used to request session management subscription data of the terminal device;

a second receiving module, configured to receive session management subscription data of the terminal device sent by the unified data management network element;

the detection module is used for detecting whether the session management subscription data carries preset indication information or not and obtaining a detection result;

and the judging module is used for determining whether the terminal equipment signs the quick call service or not according to the detection result and the value of the preset indication information.

Optionally, the apparatus further comprises:

a parameter information obtaining module, configured to obtain target parameter information of a protocol data unit session established by the terminal device;

the table look-up module is used for acquiring a target tracking area code list corresponding to the target parameter information in a predetermined first list, wherein the first list comprises the corresponding relation between the parameter information of the protocol data unit session and the tracking area list;

and a result determining module, configured to determine that the first cell supports a quick call service when the tracking area code of the first cell is included in the target tracking area code list.

Optionally, the network element determining module is specifically configured to:

Optionally, the first establishing module 1303 is specifically configured to:

Optionally, the apparatus further comprises:

a tunnel transfer module, configured to interact with a core user plane function network element and the first user plane function network element when the terminal device has signed a fast call service and the first cell supports the fast call service, and move a second tunnel from the core user plane function network element to the first user plane function network element, where the second tunnel is a tunnel used for transmitting a quality of service flow of a session initiation protocol signaling.

Optionally, the tunnel transfer module is specifically configured to:

Optionally, the apparatus further comprises:

an inserting module, configured to interact with a core user plane functional network element and the first user plane functional network element when the terminal device has signed a fast call service and the first cell supports the fast call service, and insert the first user plane functional network element into a third tunnel, where the third tunnel includes a tunnel of a quality of service flow except the first tunnel and the second tunnel, and the second tunnel is a tunnel of a quality of service flow used for transmitting session initiation protocol signaling.

Optionally, the insertion module is specifically configured to:

sending fifth indication information to the core user plane function network element, where the fifth indication information is used to indicate to delete an N3 endpoint of the third tunnel on the core user plane function network element, and establish an N9 endpoint of the third tunnel on the core user plane function network element;

Optionally, the apparatus further comprises:

and a second deleting module, configured to interact with the first user plane function network element and delete the tunnel on the first user plane function network element when the terminal device moves to a second cell and the second cell does not support a quick call service.

Optionally, the apparatus further includes at least one of the following modules:

a second sending module, configured to send seventh indication information to the core user plane function network element when an N9 endpoint of a third tunnel is established on the core user plane function network element;

a third sending module, configured to send eighth indication information to the core user plane function network element when the N3 endpoint and the N6 endpoint of the second tunnel do not exist on the core user plane function network element;

a third establishing module, configured to, in a case that the edge computing application exists in the second cell, obtain a predetermined second user plane function network element corresponding to the second cell, interact with the second user plane function network element, and establish a fourth tunnel for the terminal device;

Optionally, the cell determining module 1301 is specifically configured to:

or

Optionally, the apparatus further comprises:

a rule information obtaining module, configured to interact with a policy control function network element to obtain policy and charging control rule information of the first tunnel when the terminal device has signed a fast call service and the first cell supports the fast call service, where the policy and charging control rule information of the first tunnel includes flow description information, and a configuration of the flow description information in the policy control function network element is the same as a configuration of the flow description information in the IP multimedia subsystem.

Optionally, the rule information obtaining module is specifically configured to:

Optionally, the apparatus further comprises:

a rule information deleting module, configured to send tenth indication information to the policy control function network element when the terminal device moves to a second cell and the second cell does not support a fast call service, where the tenth indication information is used to indicate that the second cell does not support the fast call service and indicate that the policy control function network element deletes the policy and charging control rule information of the first tunnel.

Optionally, the apparatus further comprises:

a fourth establishing module, configured to interact with the first user plane functional network element when the edge computing application exists in the first cell, and establish a fourth tunnel on the first user plane functional network element, where the fourth tunnel is a tunnel used for carrying a quality of service flow of edge computing data.

Optionally, the fourth establishing module is specifically configured to:

sending eleventh indication information to the first user plane function network element, where the eleventh indication information is used to indicate that an N3 endpoint and an N6 endpoint of the fourth tunnel are established on the first user plane function network element, and establish a connection between the N3 endpoint of the fourth tunnel on the first user plane function network element and the N3 endpoint of the first base station to which the first cell belongs, and a connection between the N6 endpoint of the fourth tunnel on the first user plane function network element and an edge computing server.

Referring to fig. 14, an embodiment of the present application provides a call service processing apparatus, which is applied to a first user plane function network element, and the apparatus includes:

a second establishing module 1401, configured to interact with a session management function network element to establish a first tunnel for a terminal device when the terminal device has signed a fast call service and a first cell in which the terminal device is located supports the fast call service;

the first user plane functional network element is a predetermined user plane functional network element corresponding to the first cell, and the first tunnel is a tunnel for transmitting a quality of service flow of voice data.

Optionally, the second establishing module 1401 is specifically configured to:

Optionally, the apparatus further comprises:

a third receiving module, configured to receive fourth indication information sent by the session management function network element when the terminal device has signed a fast call service and the first cell supports the fast call service;

a first executing module, configured to establish an N3 endpoint and an N6 endpoint of a second tunnel on the first user plane function network element according to the fourth indication information, and establish a connection between the N3 endpoint of the second tunnel on the first user plane function network element and an N3 endpoint of a first base station to which the first cell belongs, and a connection between the N6 endpoint of the second tunnel on the first user plane function network element and an IP multimedia subsystem;

Optionally, the apparatus further comprises:

a fourth receiving module, configured to receive sixth indication information sent by the session management function network element when the terminal device has signed a fast call service and the first cell supports the fast call service;

a second execution module, configured to establish an N3 endpoint and an N9 endpoint of a third tunnel on the first user plane function network element according to the sixth indication information, and establish a connection between the N3 endpoint of the third tunnel on the first user plane function network element and the N3 endpoint of the first base station to which the first cell belongs, and a connection between the N9 endpoint of the third tunnel on the first user plane function network element and the N9 endpoint of the third tunnel on the core user plane function network element;

Optionally, the apparatus further comprises:

and a third deleting module, configured to interact with the session management function network element and delete the tunnel on the first user plane function network element when the terminal device moves to a second cell and the second cell does not support a quick call service.

Optionally, the apparatus further comprises:

a fourth establishing module, configured to establish, with the session management function network element, a fourth tunnel on the first user plane function network element when the edge computing application exists in the first cell, where the fourth tunnel is a tunnel used for carrying a quality of service flow of edge computing data.

Optionally, the apparatus further comprises:

a fifth receiving module, configured to receive eleventh indication information sent by the session management function network element;

a third executing module, configured to establish an N3 endpoint and an N6 endpoint of the fourth tunnel on the first user plane function network element according to the eleventh indication information, and establish a connection between the N3 endpoint of the fourth tunnel on the first user plane function network element and the N3 endpoint of the first base station to which the first cell belongs, and a connection between the N6 endpoint of the fourth tunnel on the first user plane function network element and the edge computing server.

Referring to fig. 15, an embodiment of the present application provides a call service processing apparatus, which is applied to a core user plane function network element, and the apparatus includes:

a first receiving module 1501, configured to receive third indication information sent by a session management function network element when a terminal device has signed a fast call service, a first cell in which the terminal device is located supports the fast call service, and a first tunnel is established for the terminal device on a first user plane function network element;

a first deleting module 1502, configured to delete an N3 endpoint and an N6 endpoint of the second tunnel on the core user plane function network element according to the third indication information;

Optionally, the apparatus further comprises:

a sixth receiving module, configured to receive eighth indication information sent by the session management function network element when the terminal device moves to a second cell and the second cell does not support a quick call service;

a fourth executing module, configured to establish, according to the eighth indication information, an N3 endpoint and an N6 endpoint of the second tunnel on the core user plane function network element, and establish a connection between the N3 endpoint of the second tunnel on the core user plane function network element and an N3 endpoint of a second base station to which the second cell belongs, and a connection between the N6 endpoint of the second tunnel on the core user plane function network element and an IP multimedia subsystem.

Optionally, the apparatus further comprises:

a seventh receiving module, configured to receive fifth indication information sent by a session management function network element when a terminal device has signed a quick call service, the first cell supports the quick call service, and a first tunnel is established for the terminal device on a first user plane function network element;

a fifth executing module, configured to delete an N3 endpoint of a third tunnel on the core user plane functional network element according to the fifth indication information, and establish an N9 endpoint of the third tunnel on the core user plane functional network element;

Optionally, the apparatus further comprises:

an eighth receiving module, configured to receive seventh indication information sent by the network element with the session management function when the terminal device moves to a second cell and the second cell does not support a quick call service;

a sixth executing module, configured to delete the N9 endpoint of the third tunnel on the core user plane functional network element according to the seventh indication information, establish an N3 endpoint of the third tunnel on the core user plane functional network element, establish a connection between the N3 endpoint of the third tunnel on the core user plane functional network element and the N3 endpoint of the second base station to which the second cell belongs, and establish a connection between the N6 endpoint of the third tunnel on the core user plane functional network element and a data network.

It should be noted that, in the embodiment of the present application, the division of the unit is schematic, and is only one logic function division, and when the actual implementation is realized, another division manner may be provided. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

It should be noted that the apparatus provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

Embodiments of the present application also provide a network device, as shown in fig. 16, comprising a memory 1620, a transceiver 1610, a processor 1600;

a memory 1620 for storing computer programs;

a transceiver 1610 for receiving and transmitting data under the control of the processor 1600;

in a first aspect, when the network device is applied to a network element with session management function, the processor 1600 is configured to read the computer program in the memory 1620 and execute the following operations:

determining a first cell in which the terminal equipment is located;

Optionally, the processor 1600 is further configured to:

the control transceiver 1610 sends a first request message to a unified data management network element, where the first request message is used to request session management subscription data of the terminal device;

the control transceiver 1610 receives the session management subscription data of the terminal device sent by the unified data management network element;

Optionally, the processor 1600 is further configured to:

and under the condition that the tracking area code of the first cell is included in the target tracking area code list, determining that the first cell supports a quick call service.

Optionally, when acquiring the predetermined first user plane function network element corresponding to the first cell, the processor 1600 is specifically configured to:

Optionally, the processor 1600, when interacting with the first user plane function network element and establishing the first tunnel for the terminal device, is specifically configured to:

controlling the transceiver 1610 to send first indication information and identification information of an N3 endpoint of a first base station to which the first cell belongs to the first user plane function network element, where the first indication information is used to indicate that an N3 endpoint and an N6 endpoint of the first tunnel are established on the first user plane function network element, and to establish a connection between the N3 endpoint of the first tunnel on the first user plane function network element and the N3 endpoint of the first base station, and a connection between the N6 endpoint of the first tunnel on the first user plane function network element and an IP multimedia subsystem;

the control transceiver 1610, through an access and mobility management function network element, sends, to the first base station, identification information of an N3 endpoint of the first tunnel on the first user plane function network element and second indication information, where the second indication information is used to indicate that a connection between the N3 endpoint of the first base station and the N3 endpoint of the first tunnel on the first user plane function network element is established.

Optionally, the processor 1600 is further configured to:

Optionally, when the processor 1600 interacts with a core user plane function network element and the first user plane function network element and moves the second tunnel from the core user plane function network element to the first user plane function network element, the processor is specifically configured to:

controlling the transceiver 1610 to send third indication information to the core user plane function network element, where the third indication information is used to indicate to delete the N3 endpoint and the N6 endpoint of the second tunnel on the core user plane function network element;

the control transceiver 1610 is configured to send fourth indication information to the first user plane function network element, where the fourth indication information is used to indicate that an N3 endpoint and an N6 endpoint of the second tunnel are established on the first user plane function network element, and establish a connection between the N3 endpoint of the second tunnel on the first user plane function network element and the N3 endpoint of the first base station to which the first cell belongs, and a connection between the N6 endpoint of the second tunnel on the first user plane function network element and the IP multimedia subsystem.

Optionally, the processor 1600 is further configured to:

and under the condition that the terminal equipment has signed a quick call service and the first cell supports the quick call service, interacting with a core user plane function network element and the first user plane function network element, and inserting the first user plane function network element into a third tunnel, wherein the third tunnel comprises a tunnel of a quality of service flow except the first tunnel and the second tunnel, and the second tunnel is a tunnel of the quality of service flow for transmitting a session initial protocol signaling.

Optionally, when the processor 1600 interacts with a core user plane function network element and the first user plane function network element and inserts the first user plane function network element into the third tunnel, the processor is specifically configured to:

controlling the transceiver 1610 to send fifth indication information to the core user plane function network element, where the fifth indication information is used to indicate to delete an N3 endpoint of the third tunnel on the core user plane function network element, and establish an N9 endpoint of the third tunnel on the core user plane function network element;

the control transceiver 1610 sends sixth indication information to the first user plane function network element, where the sixth indication information is used to indicate that an N3 endpoint and an N9 endpoint of the third tunnel are established on the first user plane function network element, and a connection between the N3 endpoint of the third tunnel on the first user plane function network element and an N3 endpoint of a first base station to which the first cell belongs is established, and a connection between an N9 endpoint of the third tunnel on the first user plane function network element and an N9 endpoint of the third tunnel on the core user plane function network element are established.

Optionally, the processor 1600 is further configured to:

and under the condition that the terminal equipment moves to a second cell and the second cell does not support the quick call service, interacting with the first user plane function network element and deleting the tunnel on the first user plane function network element.

Optionally, the processor 1600 is further configured to perform at least one of the following steps:

under the condition that an N9 endpoint of a third tunnel is established on the core user plane functional network element, controlling the transceiver 1610 to send seventh indication information to the core user plane functional network element;

under the condition that the N3 endpoint and the N6 endpoint of the second tunnel do not exist on the core user plane functional network element, controlling the transceiver 1610 to send eighth indication information to the core user plane functional network element;

the seventh indication information is used to indicate to delete an N9 endpoint of the third tunnel on the core user plane function network element, establish an N3 endpoint of the third tunnel on the core user plane function network element, establish a connection between the N3 endpoint of the third tunnel on the core user plane function network element and an N3 endpoint of the second base station to which the second cell belongs, and establish a connection between an N6 endpoint of the third tunnel on the core user plane function network element and a data network;

Optionally, when determining the first cell in which the terminal device is located, the processor 1600 is specifically configured to:

or

Optionally, the processor 1600 is further configured to:

Optionally, when interacting with the policy control function network element and acquiring the policy and charging control rule information of the first tunnel, the processor 1600 is specifically configured to:

the control transceiver 1610 sends ninth indication information to the policy control function network element, where the ninth indication information is used to indicate that the terminal device has signed a fast call service, and the first cell supports the fast call service;

the control transceiver 1610 receives the policy and charging control rule information of the first tunnel sent by the policy control function network element.

Optionally, the processor 1600 is further configured to:

when the terminal device moves to a second cell and the second cell does not support a fast call service, the control transceiver 1610 sends tenth indication information to the policy control function network element, where the tenth indication information is used to indicate that the second cell does not support the fast call service and indicate that the policy control function network element deletes the policy and charging control rule information of the first tunnel.

Optionally, the processor 1600 is further configured to:

Optionally, the processor 1600 is configured to interact with the first user plane function network element, and when a fourth tunnel is established on the first user plane function network element, specifically:

the control transceiver 1610 is configured to send eleventh indication information to the first user plane function network element, where the eleventh indication information is used to indicate that an N3 endpoint and an N6 endpoint of the fourth tunnel are established on the first user plane function network element, and establish a connection between the N3 endpoint of the fourth tunnel on the first user plane function network element and the N3 endpoint of the first base station to which the first cell belongs, and a connection between the N6 endpoint of the fourth tunnel on the first user plane function network element and an edge computing server.

In a second aspect, when the network device is applied to a first user plane function network element, the processor 1600 is configured to read the computer program in the memory 1620 and execute the following operations:

under the condition that terminal equipment has signed a rapid calling service and a first cell where the terminal equipment is located supports the rapid calling service, interacting with a session management function network element to establish a first tunnel for the terminal equipment;

Optionally, the processor 1600, when interacting with the session management function network element and establishing the first tunnel for the terminal device, is specifically configured to:

the control transceiver 1610 receives the first indication information sent by the session management function network element and the identification information of the N3 endpoint of the first base station to which the first cell belongs;

Optionally, the processor 1600 is further configured to:

when the terminal device has signed a fast call service and the first cell supports the fast call service, the control transceiver 1610 receives fourth indication information sent by the session management function network element;

Optionally, the processor 1600 is further configured to:

when the terminal device has signed a quick call service and the first cell supports a quick call service, the control transceiver 1610 receives sixth indication information sent by the session management function network element;

Optionally, the processor 1600 is further configured to:

Optionally, when the processor 1600 establishes the fourth tunnel with the session management function network element on the first user plane function network element, the processor is specifically configured to:

the control transceiver 1610 receives the eleventh indication information sent by the session management function network element;

according to the eleventh indication information, establishing an N3 endpoint and an N6 endpoint of the fourth tunnel on the first user plane function network element, and establishing a connection between the N3 endpoint of the fourth tunnel on the first user plane function network element and the N3 endpoint of the first base station to which the first cell belongs, and a connection between the N6 endpoint of the fourth tunnel on the first user plane function network element and an edge calculation server.

In a third aspect, when the network device is applied to a core user plane function network element, the processor 1600 is configured to read the computer program in the memory 1620 and execute the following operations:

when a terminal device has signed a fast call service, a first cell in which the terminal device is located supports the fast call service, and a first tunnel is established for the terminal device on a first user plane functional network element, the control transceiver 1610 receives third indication information sent by a session management functional network element;

Optionally, the processor 1600 is further configured to:

when the terminal device moves to a second cell and the second cell does not support a quick call service, the control transceiver 1610 receives eighth indication information sent by the session management function network element;

Optionally, the processor 1600 is further configured to:

when the terminal device has signed a fast call service, the first cell supports the fast call service, and a first tunnel is established for the terminal device on a first user plane functional network element, the control transceiver 1610 receives fifth indication information sent by a session management functional network element;

Optionally, the processor 1600 is further configured to:

when the terminal device moves to a second cell and the second cell does not support a quick call service, the control transceiver 1610 receives a seventh indication information sent by the network element with the session management function;

In fig. 16, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 1600, and various circuits, represented by the memory 1620, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1610 can be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The processor 1600 is responsible for managing the bus architecture and general processing, and the memory 1620 may store data used by the processor 1600 in performing operations.

The processor may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and may also have a multi-core architecture.

An embodiment of the present invention further provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, and the computer program is configured to enable the processor to execute the call service processing method described above.

The processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), solid State Disks (SSDs)), etc.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A call service processing method is applied to a session management function network element, and is characterized in that the method comprises the following steps:

determining a first cell in which the terminal equipment is located;

2. The method of claim 1, wherein before the obtaining the predetermined first user plane function network element corresponding to the first cell, the method further comprises:

3. The call service processing method according to claim 1, wherein before the obtaining the predetermined first user plane function network element corresponding to the first cell, the method further comprises:

4. The method of claim 1, wherein the obtaining a predetermined first user plane function network element corresponding to the first cell comprises:

5. The method of claim 1, wherein the interacting with the first user plane function network element to establish a first tunnel for the terminal device comprises:

6. The call service processing method according to claim 1, wherein the method further comprises:

7. The method of claim 6, wherein the interacting with the core user plane function network element and the first user plane function network element to move the second tunnel from the core user plane function network element to the first user plane function network element comprises:

8. The call service processing method according to claim 1, wherein the method further comprises:

9. The method of claim 8, wherein the interacting with the core user plane function network element and the first user plane function network element and inserting the first user plane function network element into a third tunnel comprises:

10. The call service processing method according to any one of claims 1 to 9, wherein the method further comprises:

11. The method of claim 10, wherein after interacting with the first user plane functional network element and deleting the tunnel on the first user plane functional network element, the method further comprises at least one of the following steps:

under the condition that an N9 endpoint of a third tunnel is established on a core user plane function network element, sending seventh indication information to the core user plane function network element;

under the condition that the edge calculation application exists in the second cell, acquiring a predetermined second user plane function network element corresponding to the second cell, interacting with the second user plane function network element, and establishing a fourth tunnel for the terminal equipment;

12. The call service processing method according to claim 1, wherein the determining the first cell in which the terminal device is located comprises:

or

13. The call service processing method according to claim 1, wherein the method further comprises:

14. The method of claim 13, wherein the interacting with a policy control function network element to obtain the policy and charging control rule information of the first tunnel comprises:

15. The method of claim 13, wherein after interacting with a policy control function network element and obtaining policy and charging control rule information of the first tunnel, the method further comprises:

16. The call service processing method according to claim 1, wherein the method further comprises:

17. The method of claim 16, wherein the interacting with the first user plane functional network element and establishing a fourth tunnel on the first user plane functional network element comprises:

18. A call service processing method is applied to a first user plane function network element, and is characterized in that the method comprises the following steps:

19. The call service processing method according to claim 18, wherein the interacting with the session management function network element to establish the first tunnel for the terminal device includes:

20. The call service processing method according to claim 18, wherein the method further comprises:

21. The call service processing method according to claim 18, wherein the method further comprises:

22. The call service processing method according to claim 18, wherein the method further comprises:

and under the condition that the terminal equipment moves to a second cell and the second cell does not support the quick call service, interacting with the session management function network element and deleting the tunnel on the first user plane function network element.

23. The call service processing method according to claim 18, wherein the method further comprises:

24. The method of claim 23, wherein the establishing a fourth tunnel with the session management function network element on the first user plane function network element comprises:

25. A call service processing method is applied to a core user plane function network element, and is characterized in that the method comprises the following steps:

26. The call service processing method according to claim 25, wherein the method further comprises:

27. The call service processing method according to claim 25, wherein the method further comprises:

28. The call service processing method according to claim 27, wherein the method further comprises:

29. A call service processing apparatus applied to a session management function network element, the apparatus comprising:

30. A call service processing apparatus, applied to a first user plane function network element, the apparatus comprising:

31. A call service processing apparatus, applied to a core user plane function network element, the apparatus comprising:

a first deleting module, configured to delete the N3 endpoint and the N6 endpoint of the second tunnel on the core user plane function network element according to the third indication information;

32. A network device applied to a network element with session management function, comprising a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for performing the method of any one of claims 1 to 17.

33. A network device, for use in a first user plane function network element, comprising a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for performing the method of any one of claims 18 to 24.

34. A network device, for use in a core user plane function network element, comprising a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for performing the method of any one of claims 25 to 28.

35. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing a processor to perform the method of any of claims 1 to 17, or to perform the method of any of claims 18 to 24, or to perform the method of any of claims 25 to 28.