What is MMS messaging

MMS - Multimedia Messaging Service

MMS is a messaging service for mobile devices, e.g. B. Cell phones and smartphones. As a successor to SMS, MMS is intended to transmit messages with multimedia content in cellular networks. Within the cellular network, MMS is a simple data transmission.
SMS and MMS are very similar. The difference lies in the information content and the carrier technology. While an SMS is up to 160 characters long, the length of MMS messages is several kByte.
MMS uses WAP (Wireless Application Protocol) for transmission in cellular networks. WAP makes the use of MMS independent of mobile radio technology as a transmission medium. With WAP, MMS can use any cellular technology.
MMS is standardized by the WAP Forum and the 3rd Generation Partnership Projects (3GPP). The 3GPP specification describes the network architecture. The specification of the WAP forum defines the WAP protocol for receiving messages.

Network architecture

The MMS Center, MMSC for short, is a central component of the infrastructure. The MMSC receives, stores and sends the multimedia messages. In addition, the MMSC has interfaces, links and services to other networks and applications.

The MMSC essentially consists of the MMS relay, the MMS server, a message store and various databases.
The MMS relay has access to the databases, the server and the message store. It maintains connections to the Internet, other network operators, the SMS center (SMS-C) and the cellular network. The MMS messages are received and sent using the WAP protocol. Various protocols and networks are supported in the MMS relay. It acts as a gateway to convert MMS into other message formats. So z. B. an MMS can be converted into an e-mail or, conversely, an e-mail into an MMS.
Like SMS, an MMS message is sent to the recipient's MMS-capable device. Either automatically or with an SMS announcement which, if desired, transmits the full MMS message. Users can send, receive, reply to, delete, and forward MMS messages to other users or email addresses.
In contrast to the SMS and EMS service, the content and size of an MMS are not subject to any restrictions. The practical limitation is subject to the memory of the end device and the specifications of the network operator.

Applications

  • Text: Text messages with different fonts, sizes and formats. Additions to photos, pictures, underlaid with music and videos.
  • Images: Transmission of diagrams, tables, maps, sketches, captured photos and digital postcards. Weather maps with animated satellite images, city maps and directions.
  • Audio: Transmission of sound sequences, pieces of music and recorded messages.
  • Video: Transmission of video clips recorded with a digital camera.
  • Streaming: With MMS streaming, the data flows similarly to a broadcast medium, e.g. B. TV, without interruption.

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