Content for TS 23.231 Word version: 18.0.0
6.1.2 Originating Call Establishment For Iu Interface on IP with immediate MGW selection
6.1.3 Originating Call Establishment For A Interface user plane over IP with immediate MGW selection
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6.1.2 Originating Call Establishment For Iu Interface on IP with immediate MGW selection p. 23
For IP transport over the IuCS interface the procedures in the present clause shall apply in addition to the SIP-I based Core Network side procedures described in clause 6.1.1.
For the access side termination, the exchange of IP addresses as defined in the clause 6.1.3 of TS 23.205 shall apply.
If the bearer transport is IP and IuUP mode is Support, the MGW shall use the source IP address and UDP Port of the IuUP Init packet received from the radio access network as the destination address for subsequent downlink packets.
The sequence is shown in Figure 6.1.2.1.
6.1.3 Originating Call Establishment For A Interface user plane over IP with immediate MGW selection p. 24
For A interface user plane over IP, the procedures in the present clause shall apply in addition to the SIP-I based Core Network side procedures described in clause 6.1.1.
For the access side termination, the exchange of IP addresses as defined in the clause 6.1.5 of TS 23.205 shall apply.
The sequence is shown in Figure 6.1.3.1.
Figure 6.1.3.1: Originating Call Establishment for A interface user plane over IP
(⇒ copy of original 3GPP image)
(⇒ copy of original 3GPP image)
