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OSA - OPen Service Access


OSA - Open Service Access

Group closed 2008-06; work transferred to Open Mobile Alliance

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Meetings Previous meeting reports and documents

Terms of reference (Historical – Work now done in OMA)

CT5 develops Application Programming Interfaces (APIs) for the Open Service Access (OSA). The UMTS network provides these interfaces to facilitate service implementations. CT5 is responsible for the following specifications:

  • Stage 2 for the UMTS OSA Architecture (TS 23.198);
  • Stage 3 for the interfaces specific to the UMTS OSA (TS 29.198-series);
  • Definition of the interface classes, methods and detailed behaviour of those classes (TS 29.198-series);
  • IDL, WSDL, Java specifications of the UMTS OSA-specific interfaces (TS 29.198-series);
  • Functional mapping of OSA interfaces to UMTS network protocols (TR 29.998-series);
  • OSA interfaces at high level of abstractions (also known as Parlay X Web services 29.199-series).

The work of CT5 is based on the Service Requirements set by SA1 and on the 3GPP Architecture defined by SA2.

Dependencies with other groups;

  • Inside 3GPP: direct relationship with SA1/SA2;
  • Joint meetings with ETSI TISPAN, the Parlay Consortium and 3GPP2 with the aim to work on a common technical basis for the standards, in the areas where the scopes overlap;
  • External organizations with which CT5 does not liaise directly, but which carry out similar kind of work: ITU-T (liaison via ETSI TISPAN).
  • Providing alignment with other Web Services specifications, CT5 utilizes specifications and profiles published by W3C, WS Interoperability Organization (WS-I) and OASIS.
CT Working groups 
TSG CT Plenary  
[No WG2] See Old Terminals Group 2
TSG CT WG3 Interworking with external networks
TSG CT WG5 OSA (Now transferred to OMA)
TSG CT WG6 Smart Card Application Aspects
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