A.5 E-RAB related performance

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

E-RAB management procedure includes E-RAB Setup procedure and E-RAB Release Request procedure. The purpose of the E-RAB Setup procedure is to assign resources on Uu and S1 for one or several E-RABs and to setup corresponding Data Radio Bearers for a given UE. Based on the E-RAB level QoS parameters IE the HeNB shall establish a Data Radio Bearer and allocate the required resources on Uu. If E-RABs are failed to be established, the involved services may fail. Therefore, the collection on per E-RAB QCI will give operators important indications whether a particular service type is running well or not. Especially, operators deliver some new feature services to customers.

During daily maintenance of network, measurements regarding E-RAB establishment and release are useful for operators to evaluate E-RAB management procedures, to analyze failure reasons of E-RAB establishment and to analyze the causes of E-RAB release. In addition, the E-RAB performance data on per QCI could give operators possibilities to assess the quality of specific service.

Based on that, these measurements are useful for drawing connection rate and drop rate of HeNB system. Both rates reflect connectivity and continuity for system services, and also direct key performance indicators of user experience. By analysing these indicators, the operator can keep track of the network as well as enhance user experience.