TIA-4951-A:2014

$40.30

cdma2000 Unstructured Supplementary Service Data (USSD)

Published By	Publication Date	Number of Pages
TIA	2014	74

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Category: TIA

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Description

The Unstructured Supplementary Service Data (USSD) mechanism
enables a Mobile Station (MS) and Public Land Mobile Network (PLMN)
operator defined application servers to communicate.

Figure 1 shows the architecture for handling of USSD sessions.
The MSC retrieves the USSD information as part of the subscriber
profile at the time of MS registration. The USSD transactions are
carried between the USSD client in the MS and the USSD Gateway (GW)
via the MSC.

This document defines the requirements for handling USSD at the
MS and network entities. It does not include specification of
particular applications, nor does it specify how a particular
application is selected.

This document also defines architecture requirements (stage 2)
and the protocol details (stage 3) of the USSD.

The new features and enhancements supported in this revision
are:

• USSD messages may be sent over a paging channel;
and

• USSD messages may be sent over an access channel.

Additional information