MMS's basic concept 2003-10-3 Sound News - Voice System - Quotation Program - MMS Browse Options:
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I. Basic concept of MMS 1. What is MMS? MMS is the abbreviation of Multimedia Messaging Service, Chinese intention is a multimedia SMS service, which is the latest business developed in accordance with 3GPP standards (3GPP TS 23.140) and WAP Forum (WAP-206 and WAP-209) for multimedia information. Its biggest feature is to support multimedia functions, also known as "GSM384", because this technology enables "global pass" data rate from current 9.6kbps to 384kbps. Multimedia SMS services are supported by WAP wireless application protocols for support of the WAP wireless application protocol with WAP Wireless Application Protocol. Support voice, Internet browsing, email, conference television, etc., realize instant mobile phone-end, mobile terminals to the Internet or Internet to mobile terminal multimedia information transmission. 2. MMS and SMS, EMS distinguish SMS, Short Messaging Service SMS service, can send textual SMS through mobile phones such as mobile phones. The term of SMS appeared in the early 1980s, but it has begun to enter the commercial market until the early 1990s, and until 1999, the business spread rapidly in the world, and has a continuous explosive growth trend. You can just enter the 21st century, and people propose EMS - Enhanced Message Service to enhance SMS business. In addition to text, it provides simple images and sound SMS services, in June 2001, several mobile giants jointly unified The standard of EMS, and the mobile phone with this function is to be produced, but because there is no support for NOKIA, it will not have it. Then why don't I support EMS? Because Nokia believes that the MMS era will come soon, there is no need to regenerate a transitional standard. (1) SMS is the earliest SMS business, is a SMS business that is now the highest. At present, SMS is only to establish a text in the mobile phone and then send it to a friend, and it is easy to use, and the length of this SMS is limited to 140 bytes. SMS is welcomed by a simple and convenient use function, but it is always the first generation of wireless data services, there is a limitations of technical standards in terms of content and applications. SMS adopts storage forwarding mechanism. The work of the SMS transmitted packet is completed by the SMS center in the mobile network, instead of the end user. If the user is not in the service area, the SMS is stored in the SMS center, and then forwards to him after the user appears. Also use the transfer confirmation mechanism. In the circuit switched data environment, the connection is end-to-end, so the user can know if the connection is completed, and the data transfer is, but in the GPRS environment, the terminal attached to the GPRS carrier is "always online", it is in any When you are ready to transfer or receive data (relative to the user), the task of checking whether the data packet is sent to the user head, and its corresponding cost is also better for each group data service. SMS is high. (2) EMS enhances SMS service, SMS enhancement version, is SMS to the MMS springboard. In addition to sending text messages like SMS, you can also send information such as simple images, sounds, and animations, still running on the original SMS running, and there is no difference in transmission paths and operations. This standard is open, any third-party company or individual interested in EMS can develop application software and services on this platform. EMS can integrate simple tones, pictures, sounds, animations, text together, then display on the EMS phone, for example, when you play an exclamation point in the text message, you play the relevant tone, or put simple black and white pictures and text and sound effects simultaneously come out.
EMS is the enhanced version of SMS, also uses signaling channels, stored and forwarded text messages through SMS center, and the principle of implementation is similar, and there is no need to upgrade the underlying network. The upgrade from SMS to EMS is transparent, and the implementation of EMS has little impact on existing SMS centers. EMS's largest modification to existing SMS center is an operator billing system. After all, EMS and SMS belong to different categories of business. The capacity of an EMS SMS may be several times better than SMS, and some formats in EMS are occupied. The space is also much larger than SMS, so the pricing strategy should not take a "one knife cut" program. In this case, the SMS center needs to add some modules, record the relevant technical value and generate the corresponding call details record. (3) MMS means multimedia SMS business. MMS is conceptually similar to SMS and EMS, which can be understood as the evolution of SMS to multimedia. However, unlike SMS and EMS, MMS has little limit for the size or complexity of the information content. The MMS can not only transfer text messages, but also transmit images, images, and audio, so MMS brings the biggest change in the development of operators to develop more diversified mobile communications services. MMS can both send and receive multimedia SMS, and can also send and receive messages containing attachments. From the perspective of the user, multimedia applications will be the key to attracting them. From a technical point of view, MMS is definitely not as simple as SMS, simple, MMS is a high-level application encapsulated on the WAP protocol (Note: Here is just the encapsulation of the protocol, there is no WAP browser itself) Using this high-level application, information transmitting including image, audio information, video information, data, and multimedia information such as text. Some of the insiders regard it as an alternative to email, and some treat it as the electronic version of the postcard, of course, more is to see the multimedia SMS. Just like the radio to the development of the TV, multimedia SMS compares the original ordinary SMS, except for basic text information, more equipped with rich color pictures, sounds, animations and other multimedia content. With MMS, mobile phones can send and receive multimedia SMS, including text, sound, images, videos, MMS support mobile phone greeting cards, mobile phone pictures, mobile phone screensaver, mobile maps, commercial cards, cartoons, interactive videos, etc. Multimedia services. MMS automatically transmits the content created by the user. It mainly adds to the recipient's phone number, which MMS communication can be performed between the terminals. At the same time, MMS also supports Email addressing, so information can be passed between terminals and email. As an emerging mobile data business, MMS development requires multi-faceted cooperation and support, including network operators, equipment manufacturers, content providers, etc., and positive attitudes held by all aspects make MMS to come out. However, implementing MMS is not a relaxing thing. In order to achieve new bearer service, network infrastructure needs to be updated, and the MMS terminal must also be popular, and there must be rich, exciting content to promote the development of applications. SMS, EMS, and MMS technology comparison list are listed below.
