CN112020096B

CN112020096B - Voice service processing system, method and device of 5G network

Info

Publication number: CN112020096B
Application number: CN201910469521.4A
Authority: CN
Inventors: 由县卫
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2022-04-15
Anticipated expiration: 2039-05-31
Also published as: CN112020096A

Abstract

The embodiment of the invention provides a voice service processing system, a method and a device of a 5G network, wherein the system comprises: a PCF node; the PCF node is connected with an IMS service network node in the 4G network through an added Rx interface; the information interaction of the Rx interface is realized according to the message defined by the Diameter protocol; the Rx interface is configured to map the received Rx media parameters to 5G QoS parameters. The method comprises the following steps: if receiving an AAR message sent by an IMS service network node of the 4G network, calling a service interface of a Session Management Function (SMF) according to the media type and service information carried by the AAR message to trigger a modification flow of a 5G PDU session and establishment or modification of a voice service QoS flow; receiving a strategy updating notification response returned by the SMF; and generating an AAA message and feeding back the AAA message to the IMS service network node. The high-capacity and high-rate bandwidth of 5G can be quickly used by connecting the Rx interface with an IMS service network node in a 4G network, high-quality voice is provided at the initial stage of the existing network, and the network is convenient to upgrade and upgrade.

Description

Voice service processing system, method and device of 5G network

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a voice service processing system, a voice service processing method and a voice service processing device of a 5G network.

Background

The current 5G voice technology solutions include EPS fault (4G network FALLBACK), NEW NR (5G air interface), and RAT fault (radio access type FALLBACK). The EPS FALLBACK scheme needs voice to fall back into a 4G network, needs 4G and 5G devices to be used interactively, can build a network at the initial stage, uses the scheme, needs 4G bandwidth for voice service, is a waste for providing a 5G network with high capacity and high speed, and needs time delay for signaling interaction in a switching process; the NEW NR scheme is completed by using a brand-NEW 5G network element, the 5G IMS of the scheme needs to be developed, at present, each equipment manufacturer has no product release plan, and the scheme is used at the later stage of networking; the RAT FALLBACK scheme only drops the air interface part of the voice service back into the 4G network, 5G service uses the 5GC core network, the scheme uses the wireless bandwidth of 4G, and the bandwidth of 5G is wasted.

As shown in fig. 1, which is a 4G network architecture, in fig. 1, an EPC (Evolved Packet Core) PCRF (Policy and Charging Rules Function) network element and an IMS (IP Multimedia Subsystem) network are in a point-to-point structure, where an RX interface is between the PCRF and the IMS network. As shown in fig. 2, which is a 5G network architecture, the IMS network and the PCRF of fig. 2 evolve into a PCF (Policy Control Function) network element of 5G, which provides a serving interface, and the IMS network of 5G provides a serving Naf interface.

For EPS FALLBACK, 5G NR does not provide voice service in the initial stage, when the gNB establishes an IMS voice channel on NR, it triggers handover, at this time, the gNB initiates a redirection or inter-RAT handover request to 5GC, and falls Back to LTE (Long Term Evolution) network, and is served by VoLTE, the user experience of EPS FB is similar to the experience of CSFB (Circuit Switch Fall Back) of 4G, the terminal resides in 5G NR, a dozen of calls, and both voice and data Fall Back to 4G LTE; the splice time is also 1-2 seconds longer than the VoNR due to the introduction of an additional fall back process. However, the CSFB experience is different from that of 4G, and services such as USSD do not trigger EPS FB.

The deployment requirement for EPS FB is LTE and NR overlapping coverage. The EPS FB has the advantages that the UE/gNB only needs to support an IMS signaling channel (SIP (Session Initiation Protocol) over NR, which has a low requirement for Real-time performance) and does not need to support an IMS voice channel (RTP (Real-time Transport Protocol)/RTCP (Real-time Transport Control Protocol) over NR, which has a high requirement for Real-time performance); RTP/RTCP over NR often requires NR to continuously perform network optimization to meet the requirements of good voice quality and low UE power consumption. By selecting the technology, an operator can focus on developing data services in the initial stage of 5G NR and then evolve to VoNR after NR network coverage and optimization.

RAT FB, i.e. RAT Fallback, similar to EPS FB, does not provide voice service in the initial stage of 5G NR, and triggers handover when the gNB establishes an IMS voice channel on 5G, at this time, the gNB initiates a redirection or inter-RAT handover request to the 5GC, and falls back to the lte network, and the voice lte provides service.

The user experience and introduction reasons of RAT FB are the same as EPS FB. The deployment requirement of RAT FB is then that LTE and NR overlap coverage, mainly for NR and LTE non-overlap coverage, and the gbb does not deploy IMS voice channel (RTP/RTCP over NR).

The VoNR is Voice over NR, which means that Voice is carried on the gNB, and according to different 5G networking, under the VoNR, a terminal resides in NR, and both Voice service and data service are carried on an NR network. When the mobile phone moves to an area with poor NR signal coverage, the mobile phone needs to initiate coverage-based switching to realize interoperation with 4G, and the mobile phone is switched to LTE and provided with services by VoLTE.

In the prior art, 4G air interfaces are used, which occupies 4G bandwidth, and high bandwidth and high rate of 5G are a waste of resources, and in addition, NEW NR needs to modify an IMS network, so EPS fault back and RAT fault back are solutions for initial voice of network construction, and VoNR technology utilizes 5G air interface resources, and can provide high-quality audio service, but can be used only at the later stage of network construction because of large IMS modification. Therefore, how to rapidly use the 5G high-capacity and high-rate bandwidth to provide a high-quality voice solution in the early stage of the existing network is a problem to be solved urgently.

Disclosure of Invention

Because the existing method has the above problems, embodiments of the present invention provide a voice service processing system, method, and apparatus for a 5G network.

In a first aspect, an embodiment of the present invention provides a voice service processing system for a 5G network, including: a policy control function, PCF, node;

the PCF node is connected with an IP multimedia subsystem IMS service network node in the 4G network through an added receiving Rx interface;

the information interaction of the Rx interface is realized according to the message defined by the Diameter protocol;

the Rx interface is configured to map the received Rx media parameters to 5G quality of service QoS parameters.

Optionally, the Diameter protocol of the Rx interface is carried in a transmission control protocol TCP or a stream control transmission protocol SCTP.

In a second aspect, an embodiment of the present invention provides a voice service processing method for a voice service processing system based on a 5G network, including:

if receiving an AAR message sent by an IMS service network node of a 4G network, calling a service interface of a Session Management Function (SMF) according to a media type and service information carried by the AAR message to trigger a modification flow of a 5G PDU session and establishment or modification of a voice service QoS flow;

receiving a strategy updating notification response returned by the SMF;

generating an AAA message and feeding back the AAA message to the IMS service network node.

Optionally, the generating an AAA message and feeding back the AAA message to the IMS service network node specifically includes:

and generating an AAA message according to the strategy updating notification response, and feeding back the AAA message to the IMS service network node.

and generating an AAA message according to the AAR message, and feeding back the AAA message to the IMS service network node.

Optionally, the method further comprises:

and if receiving the STR for terminating the 5G PDU session request sent by the IMS service network node, feeding back an STA message to the IMS service network node, and calling a service interface of the SMF to trigger a release process of the 5G PDU session.

Optionally, the method further comprises:

sending an operation request for terminating the voice service QoS flow to the SMF so that the SMF invokes preset operation to terminate the voice service QoS flow according to the operation request;

and receiving a voice service termination response returned by the SMF, mapping the voice service QoS flow into a corresponding session, and sending an ASR message to the IMS service network node according to the corresponding session so as to terminate the session corresponding to the voice service QoS flow corresponding to the IMS service network node.

In a third aspect, an embodiment of the present invention provides a voice service processing apparatus of a voice service processing system based on a 5G network, including:

the interface calling module is used for calling a service interface of a Session Management Function (SMF) according to the media type and service information carried by an AAR message to trigger the modification flow of a 5G PDU session and the establishment or modification of a voice service QoS flow if the AAR message sent by an IMS service network node of a 4G network is received;

a response receiving module, configured to receive a policy update notification response returned by the SMF;

and the message feedback module is used for generating an AAA message and feeding back the AAA message to the IMS service network node.

Optionally, the message feedback module is specifically configured to generate an AAA message according to the policy update notification response, and feed back the AAA message to the IMS service network node.

Optionally, the message feedback module is specifically configured to generate an AAA message according to the AAR message, and feed back the AAA message to the IMS service network node.

Optionally, the apparatus further comprises:

and the release flow triggering module is used for feeding back an STA message to the IMS service network node and calling the service interface of the SMF to trigger the release flow of the 5G PDU session if receiving the STR which is sent by the IMS service network node and used for terminating the 5G PDU session request.

Optionally, the apparatus further comprises:

a request sending module, configured to send an operation request for terminating the voice service QoS flow to the SMF, so that the SMF invokes a preset operation to terminate the voice service QoS flow according to the operation request;

and the message sending module is used for receiving a voice service termination response returned by the SMF, mapping the voice service QoS flow into a corresponding session, and sending an ASR message to the IMS service network node according to the corresponding session so as to terminate the session corresponding to the voice service QoS flow corresponding to the IMS service network node.

In a fourth aspect, an embodiment of the present invention further provides an electronic device, including:

at least one processor; and

at least one memory communicatively coupled to the processor, wherein:

the memory stores program instructions executable by the processor, which when called by the processor are capable of performing the above-described methods.

In a fifth aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium storing a computer program, which causes the computer to execute the above method.

The voice service processing system, the method and the device of the 5G network provided by the embodiment of the invention are connected with the IMS service network node in the 4G network through the Rx interface, can quickly use the large capacity and high speed bandwidth of the 5G, provide high-quality voice at the initial stage of the existing network and are convenient for upgrading and updating the network.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a 4G network architecture provided in the prior art;

fig. 2 is a schematic diagram of a 5G network architecture provided in the prior art;

fig. 3 is a schematic structural diagram of a voice service processing system of a 5G network according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a 5G network architecture according to an embodiment of the present invention;

fig. 5 is a schematic flowchart of a voice service processing method of a 5G network according to an embodiment of the present invention;

fig. 6 is a schematic Flow chart illustrating establishment and modification of a voice Qos Flow according to an embodiment of the present invention;

fig. 7 is a schematic flowchart of Qos Session deletion triggered by 4G AF according to an embodiment of the present invention;

fig. 8 is a flowchart illustrating a 5G Qos flow deletion triggered by an SMF according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a voice service processing apparatus of a 5G network according to an embodiment of the present invention;

fig. 10 is a logic block diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.

Fig. 3 shows a connection diagram of a voice service processing system of a 5G network provided in this embodiment, including: a policy control function, PCF, node;

the PCF node is connected with an IMS service network node in the 4G network through an added Rx interface;

the 5G network structure provided in this embodiment is shown in fig. 4, where an ePCF node in fig. 4 replaces a PCF node in the existing 5G network in fig. 2, and represents an enhanced policy control function node, which corresponds to the PCF node in fig. 3. The 4G AF in fig. 3 represents an IMS service network node in the 4G network, i.e. the IMS service network node in fig. 4.

The improvement of the existing network is less for operators, and the butt joint of the PCF and the 4G IMS service network is completed by upgrading the PCF network and providing an enhanced ePCF network element, so that the NEW NR is used as an air interface technology, and the 4G IMS network is used as a 4G IMS network to complete a high-quality voice technology at the initial stage of 5G network establishment.

The served Npcf interface is provided for the 5G AF to complete the interaction with the 5G AF control plane messages, and the Rx interface is used for the 4G AF to complete the interaction with the control plane messages, as shown in fig. 4.

In this embodiment, the ePCF node replaces a PCF node in the existing 5G network, and is connected to an IMS service network node in the 4G network through an Rx interface, so that the 5G network can quickly use a large capacity and a high rate bandwidth, provide high-quality voice in the initial stage of the existing network, and facilitate upgrading and upgrading of the network. By the method, operators can be helped to perform less transformation on the basis of the existing network, and at the initial stage of network construction, 5G air interfaces are used for providing voice, and meanwhile, the development of the 5G technology in China is promoted.

The information interaction of the Rx interface is implemented according to a message defined by a Diameter protocol, and specifically includes: diameter Base Protocol (Diameter Base Protocol), Diameter Credit Control Application Protocol (Diameter Credit Control Application), and receive Application Protocol (Rx Application). The Diameter (Diameter) protocol of the Rx interface is carried in the transmission control protocol TCP or stream control transmission protocol SCTP. The Rx interface is configured to map the received Rx media parameters to 5G quality of service QoS parameters.

In the specific implementation process, the PCF network function provides an Rx interface on the basis of providing a service interface, upgrades the Rx interface to an enhanced ePCF network element, and intercommunicates with the IMS service network of the existing network 4G, information interaction on the Rx interface is realized by messages defined by Diameter Base Protocol, Diameter Credit Control Application, and Rx Application, for the transport layer Protocol, the Rx interface Diameter Protocol may be carried in TCP or SCTP, both of the two transport layer protocols PCRF and AF need to support, and the SCTP Protocol is preferred. On the Rx interface, both the ePCF and the AF need to support the simultaneous establishment of Diameter links with multiple Diameter peers.

The ePCF device needs to configure to map the received Rx media parameters to parameters related to QoS based on 5G, and perform related PCC decision according to the requested message, where the table format is shown in the following table:

Index	media type	5QI	ARP priority
				1	Voice	1
2	Video	2

Wherein, the index is the index of the media type carried in the AF request message, and is an integer value; mediatype is an enumerated value: voice or video; 5QI is a 5QI value mapped by the media type, 1 represents voice service, and 2 represents video service; the ARP priority is the value of the ARP of the media type mapping.

The interface or Rx interface using the service is determined by locally configuring the IP field range of the peer device, and specific examples are shown in the following table:

Index	ip type	ip start	ip end	interface type

wherein, the index is AF index of different connected network interfaces and is integer value; ip type is an enumerated value, ipv4 or ipv 6; the ip start is the initial address of the ip; ip end is the end address of ip; interface type is an enumeration value, Rx interface or SBI interface. Wherein, IP start and IP end can be the same, and represent an IP address.

Fig. 5 is a schematic flowchart illustrating a voice service processing method of a voice service processing system based on a 5G network according to this embodiment, where the method includes:

s501, if an AAR (Answer Auth Request, Answer authentication Request) message sent by an IMS service network node of the 4G network is received, a service interface of a Session Management Function (SMF) is called according to a media type and service information carried by the AAR message to trigger a modification flow of a 5G PDU session and establishment or modification of a voice service QoS flow.

And S502, receiving a strategy updating notification response returned by the SMF.

S503, generating AAA (Answer Auth Answer) message, and feeding back the AAA message to the IMS service network node.

Specifically, after the ePCF node is connected to the IMS service network node in the 4G network through the Rx interface, it is no longer necessary to use the low bandwidth and low rate of the 4G network, but use the high bandwidth and high rate of the 5G network to process the voice service, and the message flow for processing the establishment and modification of the QoS flow of the bearer voice is shown in fig. 6, where the 4G AF initiates the establishment of Session information, and the PDU Session modification flow triggered by the ePCF triggers the establishment and modification of the QoS flow of the voice, and specifically includes the following steps, and the sequence number of each step corresponds to the sequence number in fig. 6:

step A1: and the AF creates an AF request and initiates the establishment of an AF session.

Step A2: the AF sends an AAR message to request ePCF to establish a session, and carries media information, service information and the like.

Step A3: the ePCF receives the AAR request, calls a service interface of SMF (Session Management Function) according to the media type and service information carried by the AAR request, triggers a modification flow of 5G PDU Session, and triggers the establishment or modification flow of voice QoS flow.

Step A4: the SMF replies with a policy update notification response.

Step A5: the ePCF responds to the AA message with the AF.

The embodiment of the invention replaces PCF nodes in the existing 5G network by the ePCF nodes, and establishes or modifies the voice service QoS flow by connecting the Rx interface with IMS service network nodes in the 4G network, thereby being capable of rapidly using the large-capacity and high-speed bandwidth of the 5G, providing high-quality voice at the initial stage of the existing network and facilitating the upgrading and updating of the network.

Further, on the basis of the above method embodiment, S503 specifically includes:

In another embodiment, S503 specifically includes:

Referring to the corresponding embodiment of fig. 6, implementing an AAA message according to an AAR message may be sent immediately after the AAR or after step a 4.

Further, on the basis of the above embodiment of the method, the method further comprises:

s504, if receiving the STR for terminating the 5G PDU session request sent by the IMS service network node, feeding back an STA message to the IMS service network node, and calling the service interface of the SMF to trigger a release flow of the 5G PDU session.

Specifically, the Qos Session deletion process triggered by the 4G AF is shown in fig. 7, and specifically includes the following steps, where the sequence number of each step corresponds to the sequence number in fig. 7:

step B1: the AF triggers STR which terminates the Session request.

Step B2: the ePCF replies to the STA message.

Step B3: and the ePCF calls a service interface of the SMF to trigger a 5G PDU Session release flow.

Step B4: SMF replies to the strategy control update notification response message.

s505, sending an operation request for terminating the voice service QoS flow to the SMF, so that the SMF invokes a preset operation to terminate the voice service QoS flow according to the operation request;

s506, receiving a voice service termination response returned by the SMF, mapping the voice service QoS flow into a corresponding session, and sending an ASR message to the IMS service network node according to the corresponding session so as to terminate the session corresponding to the voice service QoS flow corresponding to the IMS service network node.

Specifically, a Flow of deleting a Qos Flow carrying a voice service triggered by the SMF is shown in fig. 8, and the Flow of deleting a Qos Flow carrying a voice service specifically includes the following steps, where a sequence number of each step corresponds to a sequence number in fig. 8:

step C1: the SMF invokes the Npcf _ SMPolicyControl _ Delete operation to request termination of the voice-over-QoS flow related policy.

Step C2: the ePCF replies with an Npcf _ SMPolicyControl _ Delete response message.

Step C3: and the ePCF maps the QoS Flow into a corresponding Session, sends an ASR request to the AF, and terminates the Session process corresponding to the QoS Flow.

Step C4: AF was recovered to ASA.

Step C5: the AF sends a session termination request to the ePCF.

Step C6: the ePCF replies to the session termination response.

The method provided by the embodiment can transmit voice data by using a 5G air interface under the condition that a 5G IMS device is not produced, can be popularized and used in the 5G initial stage even if the characteristics of 5G large capacity and high rate are used, and provides high-quality voice for users. In addition, at present, an equipment modification operator of the IMS does not plan, so the FALLBACK technology may exist all the time, and thus the method can be used all the time until the IMS network is upgraded.

Fig. 9 shows a voice service processing apparatus of a voice service processing system based on a 5G network provided in this embodiment, including:

an interface calling module 901, configured to, if an AAR message sent by an IMS service network node of a 4G network is received, call a service interface of a session management function SMF according to a media type and service information carried in the AAR message, so as to trigger a modification flow of a 5G PDU session and establishment or modification of a voice service QoS stream;

a response receiving module 902, configured to receive a policy update notification response returned by the SMF;

a message feedback module 903, configured to generate an AAA message and feed the AAA message back to the IMS service network node.

In this embodiment, the ePCF node replaces a PCF node in the existing 5G network, and is connected to an IMS service network node in the 4G network through an Rx interface, so that the 5G network can quickly use a large capacity and a high rate bandwidth, provide high-quality voice in the initial stage of the existing network, and facilitate upgrading and upgrading of the network.

Further, on the basis of the foregoing device embodiment, the message feedback module 903 is specifically configured to generate an AAA message according to the policy update notification response, and feed back the AAA message to the IMS service network node.

Further, on the basis of the foregoing apparatus embodiment, the message feedback module 903 is specifically configured to generate an AAA message according to the AAR message, and feed back the AAA message to the IMS service network node.

Further, on the basis of the above embodiment of the apparatus, the apparatus further comprises:

The voice service processing apparatus of the 5G network described in this embodiment may be configured to execute the foregoing method embodiments, and the principle and technical effect are similar, which are not described herein again.

Referring to fig. 10, the electronic device includes: a processor (processor)1001, a memory (memory)1002, and a bus 1003;

wherein the content of the first and second substances,

the processor 1001 and the memory 1002 complete communication with each other through the bus 1003;

the processor 1001 is configured to call program instructions in the memory 1002 to perform the methods provided by the above-described method embodiments.

The present embodiments disclose a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the methods provided by the above-described method embodiments.

The present embodiments provide a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform the methods provided by the method embodiments described above.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A voice service processing system for a 5G network, comprising: a policy control function, PCF, node;

the Rx interface is used for mapping the received Rx media parameters into 5G QoS parameters;

the information interaction of the Rx interface is implemented according to a message defined by a Diameter protocol, and specifically includes: the method is realized according to the Diameter basic Protocol, the Diameter Credit Control Application Protocol and the receiving Application Protocol Rx Application defined messages;

the Diameter protocol of the Rx interface is carried in a transmission control protocol TCP or a stream control transmission protocol SCTP.

2. A voice service processing method based on the voice service processing system of the 5G network in claim 1, comprising:

if a response authentication request AAR message sent by an IMS service network node of a 4G network is received, a service interface of a Session Management Function (SMF) is called according to the media type and service information carried by the AAR message to trigger the modification flow of a Protocol Data Unit (PDU) session of a 5G protocol and the establishment or modification of a voice service QoS flow;

receiving a strategy updating notification response returned by the SMF;

generating response authentication response (AAA) message and feeding back the AAA message to the IMS service network node;

the generating an AAA message and feeding back the AAA message to the IMS service network node specifically includes:

generating AAA message according to the strategy updating notification response, and feeding back the AAA message to the IMS service network node; alternatively, the first and second electrodes may be,

3. The method of claim 2, further comprising:

and if receiving a session ending request STR for ending the 5G PDU session request sent by the IMS service network node, feeding back a session ending response STA message to the IMS service network node, and calling a service interface of the SMF to trigger a release flow of the 5G PDU session.

4. The method of claim 3, further comprising:

and receiving a voice service termination response returned by the SMF, mapping the voice service QoS flow into a corresponding session, and sending a session termination request (ASR) message to the IMS service network node according to the corresponding session so as to terminate the session corresponding to the voice service QoS flow corresponding to the IMS service network node.

5. A voice service processing apparatus of a voice service processing system based on the 5G network of claim 1, comprising:

the message feedback module is used for generating AAA message and feeding back the AAA message to the IMS service network node;

the message feedback module is specifically configured to generate an AAA message according to the policy update notification response, and feed back the AAA message to the IMS service network node; or, the message feedback module is specifically configured to generate an AAA message according to the AAR message, and feed back the AAA message to the IMS service network node.

6. The apparatus of claim 5, further comprising:

7. The apparatus of claim 5, further comprising:

8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method for processing voice traffic of a 5G network according to any of claims 2 to 4 are implemented when the processor executes the program.

9. A non-transitory computer readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the voice traffic processing method of the 5G network according to any one of claims 2 to 4.