Modifying a first data connection to support data traffic of a second data connection

1 . A user equipment (“UE”) for wireless communication comprising:

at least one memory; and

at least one processor coupled with the at least one memory and configured to cause the UE to:

receive a first request via a first data connection supporting a plurality of quality of service (“QoS”) flows, the first request comprising a first set of parameters for establishing a second data connection with an interworking function, wherein data traffic of the second data connection is to be transferred through the first data connection;

transmit a second request to modify the first data connection in response to receiving the first request and in response to determining that none of the existing QoS flows over the first data connection is suitable to carry the data traffic of the second data connection, the second request comprising a second set of parameters derived from the first set of parameters, wherein the second set of parameters indicates to establish a new QoS flow over the first data connection; and

transmit the data traffic of the second data connection through the modified first data connection.

2 . The UE of claim 1 , wherein the new QoS flow is to carry the data traffic of the second data connection.

3 . The UE of claim 1 , wherein the second set of parameters comprises packet filters identifying the data traffic of the second data connection.

4 . The UE of claim 1 , wherein the second data connection comprises an Internet Protocol Security (“IPsec”) child security association (“SA”), wherein first set of parameters comprises a security parameter index (“SPI”) and additional QoS information for the IPsec child SA.

5 . The UE of claim 4 , wherein the second set of parameters comprises requested QoS rules and requested QoS flow descriptions for modifying the first data connection to support the data traffic of the IPsec child SA.

6 . The UE of claim 1 , wherein the first data connection is established with a non-public network and the second data connection is established with a public land mobile network.

7 . The UE of claim 1 , wherein the first request is an Internet Key Exchange (“IKE”) Create Child security association (“SA”) request received from a non-3GPP interworking function (“N3IWF”), wherein the at least one processor is further configured to cause the UE to send an IKE Create Child SA response message to the N3IWF in response to a successful modification of the first data connection and prior to transmitting the data traffic of the second data connection through the modified first data connection.

8 . The UE of claim 1 , wherein the first data connection is established in a first mobile communication network and the interworking function is in a second mobile communication network, wherein the first request is received in response to transmitting a request, via the first data connection, to establish a PDU session in the second mobile communication network via the interworking function.

9 . A method performed by a user equipment (“UE”), the method comprising:

receiving a first request via a first data connection, the first data connection supporting a plurality of quality of service (“QoS”) flows, the first request comprising a first set of parameters for establishing a second data connection with an interworking function, wherein data traffic of the second data connection is to be transferred through the first data connection;

transmitting a second request to modify the first data connection in response to receiving the first request and in response to determining that none of the existing QoS flows over the first data connection is suitable to carry the data traffic of the second data connection, the second request comprising a second set of parameters derived from the first set of parameters, wherein the second set of parameters indicates to establish a new QoS flow over the first data connection; and

transmitting the data traffic of the second data connection through the modified first data connection.

10 . The method of claim 9 , wherein the new QoS flow is to carry the data traffic of the second data connection.

11 . The method of claim 9 , wherein the second set of parameters comprises packet filters identifying the data traffic of the second data connection.

12 . The method of claim 9 , wherein the second data connection comprises an Internet Protocol Security (“IPsec”) child security association (“SA”), wherein first set of parameters comprises a security parameter index (“SPI”) and additional QoS information for the IPsec child SA.

13 . The method of claim 12 , wherein the second set of parameters comprises requested QoS rules and requested QoS flow descriptions for the modifying the first data connection to support the data traffic of the IPsec child SA.

14 . The method of claim 9 , wherein the first data connection is established with a non-public network and the second data connection is established with a public land mobile network.

15 . The method of claim 9 , wherein the first request is an Internet Key Exchange (“IKE”) Create Child security association (“SA”) request received from a non-3GPP interworking function (“N3IWF”), the method further comprising:

sending an IKE Create Child SA response message to the N3IWF in response to a successful modification of the first data connection and prior to transmitting the data traffic of the second data connection through the modified first data connection.

16 . The method of claim 9 , wherein the first data connection is established in a first mobile communication network and the interworking function is in a second mobile communication network, wherein the first request is received in response to transmitting a request, via the first data connection, to establish a PDU session in the second mobile communication network via the interworking function.