A.3 CSG service related performance

32.4533GPPPerformance Management (PM)Performance measurements Home enhanced Node B (HeNB) Subsystem (HeNS)Release 17Telecommunication managementTS

A Closed Subscriber Group identifies subscribers of an operator who are permitted to access one or more PLMN cells which have restricted access. It is a new added feature in HeNB to facilitate the provisioning of new service. The collection of CSG related performance on HeNB level could clearly reflects the status of delivered service for each subscriber. In addition to this, HeNB is an exclusive signalling terminator on the HeNS side when HeNB GW is absent. Therefore, it is necessary to capture the CSG performance data on HeNB level.

By calculating these parameters relating to CSG service, the operator can obtain the mean number of CSG UEs and the successful rate of inbound mobility for UEs. The mean number of CSG UEs indicates how many users accessing the CSG service, which is a key performance for service utilization. The successful rate of inbound mobility for UEs performs a key indicator of CSG service accessibility. As low handover success rate will impact user experience, it is important to define measurements to capture handover success rate. Furthermore, detailed analysis of handover failures is essential to know what causes the handovers.

Based on these indicators, the operator can optimize the service coverage and enhance the user experience.