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P800 Smartphone
White Paper, May 2002
37
MMS technical features
The MMS standard, just like SMS, offers store and forward transmission (instant delivery) of
messages, rather than a mailbox-type model. MMS is a person-to-person communications
solution, meaning that the user gets the message directly into the mobile. He or she doesn’t have
to call the server to get the message downloaded to the mobile. Unlike SMS, the MMS standard
uses WAP as its bearer protocol. MMS will take advantage of the high speed data transport
technologies EDGE and GPRS and support a variety of image, video and audio formats to
facilitate a complete communication experience.
For more information and to see a demonstration of MMS, go to
http://www.ericsson.com/mms/demo
Message conversion
The MMS-C is able to perform limited message conversion - for example, from MMS to SMS – so
that processing and air time is not wasted in sending messages to mobile terminals that do not
have adequate capability to receive them. It also handles service aspects such as store and
forward, guaranteed delivery, subscriber preferences, operator constraints, and billing
information. The MMS-C also vouches for high quality messaging, e.g. by format conversion. This
means that the MMS-C recognizes which formats are supported in the mobile phone, and adapts
the MMS messages to these formats. The WAP User Agent Profile (UAProf) is used to
communicate the handset’s capabilities to the MMS server.