9.5 Functional behaviour of HLR

23.0793GPPRelease 17Support of Optimal Routeing (SOR)Technical realizationTS

The functional behaviour of an HLR is specified in 3GPP TS 23.018 [6]. The procedures specific to Support of Optimal Routeing are specified in this clause.

9.5.1 Procedure OR_HLR_CF

Sheet 1: if the HLR does not support optimal routeing of basic mobile-to-mobile calls, the test "Optimal routeing allowed" takes the "No" exit.

Sheet 2: the procedures Handle_CFB, Handle_CFNRc and Handle_CFNRy are specified in 3GPP TS 23.018 [6].

9.5.2 Procedure OR_HLR_Interrogate_VLR

If the HLR does not support optimal routeing of basic mobile-to-mobile calls, this procedure will be executed only if the Send Routeing Info was from a GMSC in the same PLMN as the HLR, i.e. this was not an Optimal Routeing enquiry.

The procedure Handle_CFNRc is specified in 3GPP TS 23.018 [6].

Figure 10a: Procedure OR_HLR_CF (sheet 1)

Figure 10b: Procedure OR_HLR_CF (sheet 2)

Figure 11: Procedure OR_HLR_Interrogate_VLR