Introduction to MMS Architecture
The Multimedia Messaging Service (MMS) is organized over a set of several network elements. One objective of MMS is to deliver a messaging service interoperable with existing mobile messaging system like SMS and EMS but which is also interoperable with existing fixed messaging system such as E-mail Service.
The MMS architecture includes the software messaging application in the MMS capable mobile device necessary for the composition sending and receipt of the message. In addition other elements in the network infrastructure are required to route messages, to adapt the content of messages to capabilities of receiving devices etc.
The MMS user Agent is the software application shipped with the mobile handset which allow the composition, viewing, sending and retrieval of multimedia messages.
For the exchange of multimedia messages the MMS user agent which generates the Multimedia message is known as the Originator MMS User Agent whereas the MMS user Agent which receives the Multimedia Message is known as the Recipient User Agent.
The MMS environment (MMSE) refers to the set of MMS elements under the control of a single administration (MMS provider) in charge of providing the service to the MMS subscribers
Recipient and Originator MMS use Agents are attached respectively to the recipient and the originator MMSE. A key element in the MMS architecture is the MMS Relay/Server the MMS Relay Server is responsible for routing messages within the MMSE but also the MMSE whereas the MMS server is in charge of storing messages that are awaiting retrieval. The MMS relay and MMS Server may be provided or combined. In the later configuration the name usually given to the combined MMS relay server is the MMS-Centre (MMSE)
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