CISCO-GGSN-SERVICE-AWARE-MIB
This MIB module manages the service-aware feature of Gateway GPRS Support Node (GGSN). This MIB is an enhancement of the CISCO-GGSN-MIB. There needs to be a tight coupling between GGSN and CSG in order to realize the enhanced GGSN, which is capable of categorizing traffic flowing within a PDP context to different services. An enhanced version of Diameter Credit Control Application (DCCA) will be used for implementing real-time credit control of end users in the IPS framework. The GGSN will act as DCCA client and will interact with DCCA server for quota negotiation and usage reporting. The credit control request (CCR) message is used between DCCA-Client (DCCA-C) and DCCA-Server to request credit authorization for a given service. The credit control request has one mandatory AVP (Attribute Value Pair) called CCR. For a session based credit control several interrogation required, the first, intermediate and final. The first interrogation must be sent before the DCCA-C allows any service event to the user, CCR type is set to INITIAL in this case. When all the granted service units for one unit type are spent by the end user or the validity time is expired the DCCA-C must send a new credit control (CC) request to CC server, this is the intermediate interrogation and the CCR type AVP is set to the value UPDATE. When the end user terminates a service session the DCCA-C must send a final CCR request message to the CC server. The CCR type AVP is set to the FINAL or TERMINATION_REQUSET. CSG will be responsible for categorizing the traffic, quota management activities and usage reporting functions. GGSN will act as a quota server for CSG. A proprietary interface based on GTP' will be used between GGSN and CSG. Acronyms and terms: APN Access Point Name CCA Credit Control Answer CCR Credit Control Request CCFH Credit Control Failure Handling CDR Charging Data Record CLCI Closed Loop Charging Interface CSG Content Service Gateway DCCA Diameter Credit Control Application ETSI European Telecommunications Standards Institute GGSN Gateway GPRS Support Node GPRS General Packet Radio Service GSM Global System for Mobile communication GTP GPRS Tunneling Protocol MS Mobile Station MSISDN Mobile Station ISDN number PDP Packet Data Protocol PLMN Public Land Mobile Network SGSN Serving GPRS support Node SLB Server Load Balancing TFT Traffic Flow Template UMTS Universal Mobile Telecommunications System QS Quota Server UE User Equipment REFERENCE [1] GSM 03.60: Digital cellular telecommunications system (Phase 2+); General Packet Radio Service (GPRS); Service description; Stage 2. V7.1.0 [2] GSM 09.60: Digital cellular telecommunication system (Phase 2+); General Packet Radio Service (GPRS); GPRS Tunnelling Protocol (GTP) across Gn and Gp Interface. V7.3.0 [3] 3GPP; Technical Specification Group Services and System Aspects; QoS Concept and Architecture. 3G TS 23.107 v3.2.0. [4] 3GPP; Technical Specification Group Core Network; General Packet Radio Service(GPRS); GPRS Tunnelling Protocol (GTP) across Gn and Gp Interface (Release 1999). 3G TS 29.060 v3.5.0.