9.1.2 Detach procedure for E-UTRAN

23.1393GPP3GPP system - fixed broadband access network interworkingRelease 17Stage 2TS

This clause is related to detach procedure for E-UTRAN, and contains the following cases: UE-initiated Detach procedure, MME-initiated Detach procedure, and HSS-initiated Detach procedure.

Figure 9.1.2: Detach Procedure via HeNB- UE camping on E-UTRAN

1. UE-initiated Detach case, the UE sends a detach request message to MME, which can be referred to step 1 of figure 5.3.8.2-1, TS 23.401 [2]; MME-initiated Detach case, the MME sends a detach request message to UE, which can be referred to step 1 of figure 5.3.8.3-1, TS 23.401 [2]; HSS-initiated Detach case, the HSS sends a cancel location request message to MME, which can be referred to step 1 of figure 5.3.8.4-1, TS 23.401 [2].

2. UE-initiated Detach case, refer to steps 2-7 per TS 23.401 [2], figure 5.3.8.2-1; MME-initiated Detach case, refer to steps 2-7 per TS 23.401 [2], figure 5.3.8.3-1; HSS-initiated Detach case, refer to steps 1b – 5 per TS 23.401 [2], figure 5.3.8.4-1.

3. The P-GW initiates the IP-CAN session termination procedure with the PCRF per TS 23.203 [4].

4 The PCRF initiates the Gateway Control session termination procedure according to TS 23.203 [4]. The PCRF sends the QoS Rules Provisioning procedure when there is one or more Gx sessions linked to the S9a session.

5. UE-initiated Detach case, refer to steps 9-13 per TS 23.401 [2], figure 5.3.8.2-1; MME-initiated Detach case, refer to steps 9-12 per TS 23.401 [2], figure 5.3.8.3-1; HSS-initiated Detach case, refer to steps 7-10 per TS 23.401 [2], figure 5.3.8.4-1.