Mobile phone Development Combat 94--MMS Introduction 1

about MMS

MMS is multimedia Messaging service abbreviation, Chinese meaning is multimedia SMS, is according to 3GPP Standard (3GPP TS 23.140), and the WAP Forum standards (WAP-206 and WAP-209) for the latest business of standard development of multimedia information.

MMS's biggest feature is the support of multimedia functions, in the GPRS, WCAMD or CDMA2000 1X network support, WAP Wireless application protocol as a carrier for the transmission of video clips, pictures, sounds and text. Support Voice, internet browsing, e-mail, conference TV and other high-speed data Services, multimedia information Services can achieve instant mobile phone end-to-end, mobile phone terminal to the Internet or the internet to mobile phone terminal multimedia information transmission. According to the 3GPP standard, the handset should support the multimedia message capacity at least to reach 30K.

WAP is the basis of MMS, MMS uses WAP functions, such as WAP push,uaprof and high-capacity data transmission (Large data Transfer). WAP Forums and 3GPP have standardized MMS, making it an open standard. The 3GPP specification defines the network architecture and general functionality. The MMS specification for WAP forums defines information compression and application protocols. The transfer of MMS uses the existing transport protocol.

MMS in the GPRS network operation of the business, the net speed of more than 100K per second, and the speed of SMS is about 600 bytes per second, MMS faster than the speed of SMS. However, congestion can also occur in busy or unexpected situations.
MMS information is compressed in a standard manner, so the receiving party can determine which content formats it does not support and handle it in a controlled manner.      In order to be interactive, several major mobile communications equipment manufacturers around the world have jointly proposed a "MMS conformance file" that lists the smallest set of content formats that MMS handsets can support. In the slides of MMS,

Picture aspect support gif87a, gif89,wbmp, Base line JPEG with JFIF as the Exchange format. The picture is best to use 256 colors, so the effect is better on the phone.
In MMS slides, the supported character sets are Us-ascii (IANA mibenum 3), Utf-8 (IANA mibenum 100), utf-16 (IANA mibenum) with explicit Byte Order M Ark (BOM).
In terms of text, the supported character sets are ISO 8859-1.
In terms of sound, support amr,imelody ringtones.

Attention:
Usually if you send a multimedia message to a non-MMS phone, when the gateway confirms that the receiving terminal is MMS message to the terminal for a non-MMS phone, it will temporarily present the information to a Web page and then send an SMS notification to the receiving phone to indicate the URL of the webpage.

MMS can also be sent to a mailbox using a mobile phone.