Section: 4.3.13 Closed Subscriber Group functions
Content: Closed Subscriber Group identifies a group of subscribers who are permitted to access one or more CSG cells of the PLMN as a member of the CSG for a HeNB. The following CSG related functions are defined: - CSG subscription handling function stores and updates the user's CSG subscription data at the UE and the network. - For closed mode, CSG access control function ensures a UE has valid subscription at a CSG where it performs an access. - Admission and rate control function is used to provide different admission and rate control for CSG and non-CSG members for a hybrid CSG cell. - CSG charging function enables per CSG charging for a subscriber consuming network services via a CSG cell or a hybrid cell. - CSG Paging Optimisation function is optionally used to filter paging messages as described in clause 5.3.4.3. - VPLMN Autonomous CSG roaming function is optionally supported whereby a VPLMN, if allowed by the HPLMN, stores and manages VPLMN specific CSG subscription information for roaming UEs without interaction with the HSS. - CSG membership verification without updating the User CSG Information in the Core Network in the case of Dual Connectivity when the Secondary eNodeB is a hybrid access eNodeB.