tech-invite   World Map     

IETF     RFCs     Groups     SIP     ABNFs    |    3GPP     Specs     Glossaries     Architecture     IMS     UICC    |    search     info

3GPP Glossaries

|   Features_Services   |   Network_Entities   |   Reference_Points   |   SIM_UICC_Dir_Files   |   Identifiers   |

 

Network entities

D

F

J

K

X

Y

Z

 

 

 

Here          Top

|   CBC   |   CDF   |   CGF   |   CN   |   CRF   |   CSCF   |   CS Domain   |   CSG List Server   |   CS‑MGW   |   CSS   |   CTF   |

 

defined from  GSM Rel-98
Source:   TS 23.002, clause 4a.5.1 

The CBC is responsible for the management of CBS (cell broadcast service) messages and for determining the CBS delivery parameters of the BSS/RNS. The CBC may be connected to several BSCs/RNCs. The CBC is regarded to be integrated as a node into the core network.

Up       Top

defined from  Rel-6
Source:   TS 32.240, clause 4.3.1.2 

The CDF receives charging events from the CTF (Charging Trigger Function) via the Rf reference point. It then uses the information contained in the charging events to construct CDRs.

Up       Top

defined from  Rel-6
Source:   TS 32.240, clause 4.3.1.3 

The CDRs produced by the CDF are transferred immediately to the Charging Gateway Function (CGF) via the Ga reference point. The CGF acts as a gateway between the 3GPP network and the BD. It uses the Bx reference point for the transfer of CDR files to the BD. The entity relationship between the CDF and the CGF is m:1, i.e. one or more CDFs may feed CDRs into a single CGF.

Up       Top

defined from  GSM Rel-96
Source:   TS 23.002, clause 3.3 

The CN is constituted of a Circuit Switched (CS) domain and a Packet Switched (PS) domain (which includes GPRS and EPC). These two domains differ by the way they support user traffic. These two domains are overlapping, i.e. they contain some common entities. A PLMN can implement only one domain or both domains.

Up       Top

defined from  Rel-6
Source:   TS 29.211, clause 4.3.1 

The Charging Rules Function provides Service Data Flow level Charging Rules to the TPF (Traffic Plane Function) and informs AF about bearer session events. The CRF makes the Charging Rule decisions which may be based on the session and media related information obtained from the AF via the Rx reference point, the bearer and subscriber related information obtained from the TPF over the Gx reference point, and subscriber and service related data the CRF may be aware of. The CRF shall provision Charging Rules the TPF via the Gx reference point. The CRF may also provide policy control like functions based on Charging Rules provisioning to the TPF.

The CRF reports, via the Rx reference point, bearer events from the TPF to the AF, e.g. bearer release and bearer establishment.

Up       Top

defined from  Rel-5
Source:   TS 23.002, clause 4a.7.1 

The CSCF can act as P-CSCF (Proxy CSCF), S-CSCF (Serving CSCF), E-CSCF (Emergency CSCF), or I-CSCF (Interrogating CSCF).

The P-CSCF is the first contact point for the UE within the IM subsystem (IMS); the S-CSCF actually handles the session states in the network; the E-CSCF handles certain aspects of emergency sessions such as routing an emergency request to the correct emergency centre or PSAP; the I-CSCF is mainly the contact point within an operator's network for all IMS connections destined to a subscriber of that network operator, or a roaming subscriber currently located within that network operator's service area.

Up       Top

defined from  GSM Rel-96
Source:   TS 23.002, clause 3.3.1 

The CS domain refers to the set of all the CN entities offering "CS type of connection" for user traffic as well as all the entities supporting the related signalling. A "CS type of connection" is a connection for which dedicated network resources are allocated at the connection establishment and released at the connection release.

Up       Top

defined from  Rel-9
Source:   TS 23.002, clause 4a.25.3 

The CSG List Server provisions the Allowed CSG list and the Operator CSG list on the UE using the OTA procedures defined in TS 31.102 or the OMA DM procedures defined in TS 24.285.

The Allowed CSG list and the Operator CSG list are applicable to both UTRAN and E-UTRAN CSG cells for HNB and HeNB respectively.

Up       Top

defined from  Rel-4
Source:   TS 23.002, clause 4.1.2.1.2 

This component is PSTN/PLMN transport termination point for a defined network and interfaces UTRAN with the core network over Iu.

A CS-MGW may terminate bearer channels from a switched circuit network and media streams from a packet network (e.g. RTP streams in an IP network). Over Iu, the CS-MGW may support media conversion, bearer control and payload processing (e.g. codec, echo canceller, conference bridge) for support of different Iu options for CS services (AAL2/ATM based as well as RTP/UDP/IP based).

The CS-MGW:
  • Interacts with MGCF, MSC server and GMSC server for resource control.
  • Owns and handles resources such as echo cancellers etc.
  • May need to have Codecs.
The CS-MGW will be provisioned with the necessary resources for supporting UMTS/GSM transport media. Further tailoring (i.e. packages) of the H.248 may be required to support additional Codecs and framing protocols, etc.

The CS-MGW bearer control and payload processing capabilities will also need to support mobile specific functions such as SRNS relocation/handover and anchoring. It is expected that current H.248 standard mechanisms can be applied to enable this.

Up       Top

defined from  Rel-11
Source:   TS 23.002, clause 4a.25.4 

The CSS is the entity in the VPLMN storing and managing CSG subscription-related information for roaming UEs to enable VPLMN Autonomous CSG Roaming (see TS 22.220).

The CSS is responsible for holding the following user related information:
  • User Identification;
  • CSG membership granted to the subscriber during his stay in the VPLMN, i.e. list of CSG IDs and associated expiration dates;
  • User Location information: the CSS stores the location information of the subscriber for subsequent update of the CSG subscription information at the MME, SGSN and VLR upon subscription change.
The CSS consists of the following functionalities:
  • download of the CSG subscription information upon request from the serving MME, SGSN and VLR, through the S7a, S7d, Ghv and Hv interfaces, to enable roaming subscribers to access to the PS and CS Domain services via CSG cells;
  • service provisioning, including updating the appropriate serving entities (i.e. MME, SGSN and VLR) with modifications of the the CSG membership granted to the subscriber.
The organisation of the subscriber data is outlined in TS 23.008. It also indicates which numbers and identifiers specified in TS 23.003 are stored in the CSS.

Up       Top

defined from  Rel-6
for offline charging, in  TS 32.240, clause 4.3.1.1
for online charging, in  TS 32.240, clause 4.3.2.1 

The CTF, in every network element and service element that provides charging information, is the focal point for:
  • collecting the information pertaining to chargeable events within the network element,
  • assembling this information into matching charging events, and
  • sending these charging events:
    • towards the CDF via the Rf reference point for offline charging,
    • towards the OCS via the Ro or CAP reference point for online charging.

Up       Top