H248 introduction.ppt

H.248 Overview Dec. 2006 CS Core specialist center Mc-interface overview The Mc-interface is the Control interface between MSC Server and MGW in the MSC Server System The Mc-interface is based upon the ITU H.248 protocol (also known as IETF MEGACO). H.248 is developed jointly by IETF and ITU open standards body. The IETF RCF for H.248 is RFC3525 3GPP has specified how H.248 is to be used in its TS 23.205 (architecture) and TS 29.232 (Mc interface) The architecture of H.248 consists of 2 elements; Media Gateway Control (MGC) Media Gateway (MG) Within the Nokia MSC Server System the H.248 elements are represented by the following Nokia network elements; MSC Server represents the MGC Multimedia Gateway represents the MG Media Gateway Control protocols history Mc-interface Key Specifications 3GPP (TSG-Core Network WG4) TS 23.205 Bearer Independent CS Core Network Stage 2 (Release 4) TS 29.232 Media Gateway Controller – Media Gateway Interface - Stage 3 ITU H.248.1 (03/02) Gateway control protocol: Version 1 = H.248(06/00) + Implementors guide V9 H.248.1 (05/02)- Gateway control protocol: Version 2 H.248.2 - Annexes for SCTP/ATM transport, tones and announcement etc. H.248 Implementors guide V13 Q1950 (07/01)- Bearer independent call bearer control protocol Q1950 (12/02)- Bearer independent call bearer control protocol IETF RFC 2805 Media Gateway Control Protocol Architecture and Requirements RFC 3525 Gateway Control Protocol Version 1 Mc-interface Termination Context Concept Mc-interface Termination Context Concept Mc-interface Termination Context Concept Mc-interface Termination Context Concept Other basic concepts Events MGC may ask a MG to be notified about certain events (e.g. off-hook, DTMF tone detection) occurring on a termination Signals MGC may ask a MG to apply certain signals (e.g. dial tone, ringing tone) to a termination Statistics provides information describing the status and usage of a Termination during its existence within a specific