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Rel-4 (U)SIM toolkit enhancements
References for WI " Rel-4 (U)SIM toolkit enhancements "
In Release 4, only one enhancement was added in the field of (U)SIM toolkit, also called (U)SAT or USAT (Universal SIM Application Toolkit). This is the “USAT Local Link”, which refers to the use of a local link (RS232, Bluetooth, USB, Irda) as a bearer for USAT.
This work extends the existing bearer independent functionality and allows a USAT application to communicate with local devices using the local connectivity capabilities of the terminal.
For applications dedicated to third party equipment, the knowledge of the local environment (attached devices) is useful. So a way for the USAT to get the local connection status, independent of the type of link, is also defined.
As some applications may require a secure link, security facilities offered by the bearer may be used, as well as an upper layer security mechanism. This is covered in the Rel-4 created TS 23.048 “Security Mechanisms for the (U)SIM application toolkit in Rel-4”, replacing GSM 03.48. It contains following enhancements compared to Release 99 GSM 03.48:
To meet the Release 4 requirements, the storage of MMS related information in several elementary files on the SIM is introduced retroactively (affected specifications are TS 51.011 and TS 31.102).
Rel-4 Open Service Access (OSA) improvements
References for WI "OSA improvements"
Open Service Access (OSA) allows service development by operators and third parties: it enables application developers to make use of network functionality through open, standardised, secure, extensible and scalable interfaces. Applications see the network functionality offered to them as a set of Service Capability Features (SCFs) in the OSA APIs. These SCFs provide access to the network capabilities on which the application developers can rely when designing their applications. The OSA APIs are independent of where or which network capabilities are implemented in the network, and of vendor-specific solutions and programming languages.
This work (stage 1, 2 and 3 specifications) was done jointly with other fora (3GPP2, ETSI SPAN and Parlay), so that there is a single set of standard OSA APIs for the whole development community.
The objective of OSA in Release 4 is to enhance the OSA interface for the communication between Applications and Service Capability Features (SCF). The SCFs are described in the OSA set of specifications.
Release 4 brings enhancements to the OSA interface based on the evolved network capabilities within the Core Networks. Examples of these are:
This addresses the Call Control capabilities based on SIP and/or H.323. In 3GPP, SIP is introduced only in Release 5 with the IMS (IP Multimedia Subsystem). However, it is justified to have the corresponding OSA capability as early as Release 4 because SIP and H323 exist in fixed networks for some time and the 3GPP OSA has a requirement to have the same API for Fixed and Mobile networks (and, more generally, to be network-agnostic).
This takes into account the capabilities provided by the network to use the capabilities provided by the post processing of the charging capabilities (e.g. E-Pay). It also involves the enhancements of the security to be provided by the network and by the application.
The enhancements compared to OSA Release 99 are as follows:
The OSA API offer many capabilities related to charging (they supervise of user activities for online charging features; allow applications to access the online account; allow applications to add charging information to network based charging records; and inform applications on network based charging event).
Improvements of UMTS-only pre-Release 4 features
QoS Architecture for PS Domain
This chapter covers the following WIs:
The References for WI " UMTS QoS Architecture for PS Domain " given for each individual WI.
The work done under UIDs 2548 and 2550 (SA2’s architecture and SA5’s Charging aspects) was only maintenance of pre-Release 4 concepts.
RAB Quality of Service (re)Negotiation
Affected specification: TS 25.413
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