5.3.13 CSS subscription data management function procedure

23.4013GPPGeneral Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) accessRelease 18TS

5.3.13.1 General

The CSS subscription data management function allows the CSS to update the CSS subscription data stored in the MME.

The CSS subscription data is stored and managed in the MME independently from the Subscription Data received from the HSS.

Whenever the CSS subscription data is changed for a user in the CSS, and the changes affect the CSG subscription information stored in the MME, the MME shall be informed about these changes by the means of the following procedure:

– Insert CSG Subscriber Data procedure, used to add or modify the CSS subscription data in the MME.

5.3.13.2 Insert CSG Subscriber Data procedure

The Insert CSG Subscriber Data procedure is illustrated in Figure 5.3.13.2-1.

Figure 5.3.13.2-1: Insert CSG Subscriber Data procedure

1. The CSS sends an Insert CSG Subscriber Data (IMSI, CSG Subscription Data) message to the MME.

2. The MME updates the stored CSG Subscription Data and acknowledges the Insert CSG Subscriber Data message by returning an Insert CSG Subscriber Data Ack (IMSI) message to the CSS. The update result should be contained in the Ack message.

The MME initiates appropriate action according to the changed CSG subscriber data. If the UE is in ECM-CONNECTED state and connected via a CSG or hybrid cell, the MME shall check the received CSG subscriber data. If the MME detects that the CSG membership to that cell has changed or expired, the MME initiates the procedure in clause 5.16.