The Unstructured Supplementary Service Data (USSD) mechanismenables 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 subscriberprofile at the time of MS registration. The USSD transactions arecarried between the USSD client in the MS and the USSD Gateway (GW)via the MSC.
This document defines the requirements for handling USSD at theMS and network entities. It does not include specification ofparticular applications, nor does it specify how a particularapplication 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 revisionare:
• USSD messages may be sent over a paging channel;and
• USSD messages may be sent over an access channel.
- Edition:
- A
- Published:
- 04/01/2014
- Number of Pages:
- 74
- File Size:
- 1 file , 730 KB
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