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Open Service Access: Advantages and opportunities in service provisioning on 3G Mobile Networks
For further information please contact:

Uwe Herzog
Project Supervisor
Wieblinger Weg 19/4
69123 Heidelberg, Germany

Project Information
What is this Project about?

The project will assess the approach to develop next generation services for 3G mobile networks according to the Open Service Access approach (OSA, formerly Open Service Architecture). Standardisation activities for 3G mobile/UMTS are defining interfaces between applications and network functions, based on OSA concepts. The Parlay Group, which recently opened up, is one of the main contributors to the OSA specifications.
There is an increased need to provide added-value services to customers of 3G mobile networks. OSA concepts will enable the provisioning of a wide spectrum of services merging voice and data features. It offers potential benefits to shareholders by enabling application services to make better use of network functions (and thereby retain more of the services’ value-add within the network).

What are the main objectives of this Project?

The focus of the project is the investigation and the enhancement of the Open Service Access (OSA) approach for providing innovative services in 3G mobile networks (and in a shorter term in GSM/GPRS network scenarios). The main objectives of this proposal are to:

  • assess the OSA approach and the OSA specifications;
  • evaluate OSA-based products and demonstrate service development;
  • enhance the OSA specifications, by contributing to 3GPP and Parlay;
  • gain a deeper knowledge of the OSA approach in order to increase the Shareholders strategic position;
  • assess the business benefit for TelCos to define and promote an open software platform for value added services.

What are the key results of this Project?

  • Assessment of OSA specifications and OSA-based products benchmarking.
  • Enhancement of the OSA specifications, by contributing to standardization bodies and consortia.
  • Demonstration of service specification and development according to the OSA approach.
  • Gain of a better understanding of the business context of applications developed for UMTS using OSA.

What relationship exists to other organisations or bodies?

Standard bodies and consortia (3GPP OSA, Parlay, ETSI) will receive requirements and technical contributions to standardize APIs and architectural solutions.

Project Results
Deliverable Title  No Issue date
     Proposal for Enhancements to the Parlay/OSA Specifications TI1 published  Sep 01
RFI on OSA/Parlay products TI2

published Dec 01

     Definition and Solution of proposed Parlay/OSA Specification issues TI3

published Jan 02

Service Scenarios and state-of-the-art of OSA products D1

published Jan 02

Service scenarios and state-of-the-art of OSA products          (Annotated slide set) D2

published Dec 01

Service Level Agreement (SLA) and Parlay/OSA: Analysis and open issues TI4

published Mar 02

Enhancement of OSA for Network Operators' needs D3

published Mar 02

     White Paper: Non functional aspects and requirements related to Parlay/OSA products TI5

published June 02

     Assessment of OSA specifications and products

published Nov 02

     Parlay/OSA Business Models: An Operator’s Perspective TI6

published Dec 02

Proposal for enhancements to the Parlay/OSA specifications D5

published Jan 03

Service scenarios, Business models and SLAs, product evaluations and enhancements for network operators needs (Executive report and slide-set) D6

published Jan 03