Network core handling of dual stack internet protocol (IP)
Solutions for improved network core handling of dual stack internet protocol (IP), such as IPv4v6, include receiving, by a first wireless network node, from a user equipment (UE), a request for a packet data session, the request identifying a dual stack IP type having a first IP type and a second IP type; based on at least the first IP type of the dual stack IP type not matching a supported IP type of a second wireless network node, receiving, by the first wireless network node, from the second wireless network node, a deregistration request for the UE; and transmitting, by the first wireless network node, to the UE, a message that triggers the UE to request a new packet data session without exiting the current radio access technology (RAT). In some examples, the first network node comprises an access mobility function (AMF) or a mobility management entity (MME).
1 . A method comprising:
receiving, by a first wireless network node, a request for a packet data session from a user equipment (UE) registered on a first radio access technology (RAT), the request for the packet data session identifying a dual stack internet protocol (IP) type having a first IP type and a second IP type;
forwarding the request for the packet data session to a second wireless network node, wherein the first IP type is not supported by the second wireless network node;
receiving, by the first wireless network node, a deregistration request for the UE in response to the request for the packet data session, the deregistration request indicating that the UE should deregister from the first RAT based on the first IP type not being supported by the second wireless network node; and
transmitting, by the first wireless network node, a soft error message to the UE without transmitting the deregistration request to the UE, the soft error message instructing the UE to request a new packet data session without exiting the first RAT.
2 . The method of claim 1 , wherein the first IP type is IPv4v6.
3 . The method of claim 1 , wherein the request for the packet data session comprises a protocol data unit (PDU) Session Establishment Request or a Create Session Request.
4 . The method of claim 1 , wherein the first wireless network node comprises an access mobility function (AMF) or a mobility management entity (MME).
5 . The method of claim 1 , wherein the second wireless network node comprises a session management function (SMF), a policy charging function (PCF), a packet data network gateway (PGW), or a policy and charging rules function (PCRF).
6 . The method of claim 1 , wherein the deregistration request comprises a fifth generation cellular technology (5G) Deregistration message.
7 . A system comprising:
a processor; and
a computer-readable medium storing programming instructions for execution by the processor, the programming instructions, upon execution by the processor, causing the system to perform the following operations:
receiving, by a first wireless network node, a request for a packet data session from a user equipment (UE) registered on a first radio access technology (RAT), the request for the packet data session identifying a dual stack internet protocol (IP) type having a first IP type and a second IP type;
forwarding the request for the packet data session to a second wireless network node, wherein the first IP type is not supported by the second wireless network node;
receiving, by the first wireless network node, a deregistration request for the UE in response to the request for the packet data session the deregistration request indicating that the UE should deregister from the first RAT based on the first IP type not being supported by the second wireless network node; and
transmitting, by the first wireless network node, a soft error message to the UE without transmitting the deregistration request to the UE, the soft error message instructing the UE to request a new packet data session without exiting the first RAT.
8 . The system of claim 7 , wherein the first IP type is IPv4v6.
9 . The system of claim 7 , wherein the request for the packet data session comprises a protocol data unit (PDU) Session Establishment Request or a Create Session Request.
10 . The system of claim 7 , wherein the first wireless network node comprises an access mobility function (AMF) or a mobility management entity (MME).
11 . The system of claim 7 , wherein the second wireless network node comprises a session management function (SMF), a policy charging function (PCF), a packet data network gateway (PGW), or a policy and charging rules function (PCRF).
12 . The system of claim 7 , wherein the deregistration request comprises a fifth generation cellular technology (5G) Deregistration message.
13 . One or more computer storage devices having programming instructions stored thereon, which, upon execution by a processor of a computer system, cause the computer system to perform the following operations:
receiving, by a first wireless network node, a request for a packet data session from a user equipment (UE) registered on a first radio access technology (RAT), the request for the packet data session identifying a dual stack internet protocol (IP) type having a first IP type and a second IP type;
forwarding the request for the packet data session to a second wireless network node, wherein the first IP type is not supported by the second wireless network node;
receiving, by the first wireless network node, a deregistration request for the UE in response to the request for the packet data session, the deregistration request indicating that the UE should deregister from the first RAT based on the first IP type not being supported by the second wireless network node; and
transmitting, by the first wireless network node, a soft error message to the UE without transmitting the deregistration request to the UE, the soft error message instructing the UE to request a new packet data session without exiting the first RAT.
14 . The one or more computer storage devices of claim 13 , wherein the first IP type is IPv4v6.
15 . The one or more computer storage devices of claim 13 , wherein the request for the packet data session comprises a protocol data unit (PDU) Session Establishment Request or a Create Session Request.
16 . The one or more computer storage devices of claim 13 , wherein the first wireless network node comprises an access mobility function (AMF) or a mobility management entity (MME).
17 . The one or more computer storage devices of claim 13 , wherein the second wireless network node comprises a session management function (SMF), a policy charging function (PCF), a packet data network gateway (PGW), or a policy and charging rules function (PCRF).
18 . The one or more computer storage devices of claim 13 , wherein the deregistration request comprises a fifth generation cellular technology (5G) Deregistration message.
19 . The one or more computer storage devices of claim 13 , wherein the deregistration request comprises a fourth generation cellular technology (4G) Detach message.
20 . The method of claim 1 , wherein the deregistration request comprises a fourth generation cellular technology (4G) Detach message.