Section: A.1 Monitor of call(/session) setup performance
Content: Call(/session) setup is one of most important step to start delivering services by the networks to users. The success or failure of a call(/session) setup directly impacts the quality level for delivering the service by the networks, and also the feeling of the end user. So the success or failure of call(/session) setup needs be monitored, this can be achieved by the calculation of call setup success rate which gives a direct view to evaluate the call setup performance, and the analysis of the specific reason causing the failure to find out the problem and ascertain the solutions. In addition, the time duration of the call(/session) setup need to be monitored as it impacts the end user experience, and by comparison with operator’s benchmark requirements, the optimization may be required according the performance. And due to different priority and tolerance for different service type with different OoS level in the networks, the monitor needs to be opened on each service type and OoS level. To complete the call(/session) setup procedure, E-UTRAN is mainly responsible for the establishment of radio and S1 signaling connection and service bearer by the RRC connection establishment (See 3GPP TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ] [8]), RRC connection reestablishment after RRC connection dropped due to some reasons like radio link failure or handover failure etc (See 3GPP TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ] [8]) E-RAB setup (See 3GPP TS 36.413[ Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 Application Protocol (S1AP) ] [9]) and Initial UE Context Setup (See 3GPP TS 36.413[ Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 Application Protocol (S1AP) ] [9]) procedure. To support the monitor of success or failure of the call(/session) setup, the performance measurements related to RRC connection establishment (See 3GPP TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ] [8]), RRC connection reestablishment (See 3GPP TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ] [8]) procedure, and the performance measurements related to E-RAB setup (See 3GPP TS 36.413[ Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 Application Protocol (S1AP) ] [9]) and Initial UE Context Setup (See 3GPP TS 36.413[ Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 Application Protocol (S1AP) ] [9]) procedure for each QoS level are required To support the monitor of time duration of setup call(/session) setup, the performance measurements related to RRC connection setup time and E-RAB setup time are required.