What do Chinese short messages SMS, EMS, MMS, SMS, EMS and MMS mean respectively?

SMS: It is simple, convenient and easy to use to create a short message in your mobile phone and send it to your friends. The average capacity of each message is 140 bytes.

EMS: It has the function of pulling short messages. It is a kind of information that combines words, images, animations or ringtones. Users can send messages to another mobile phone that supports EMS.

MMS: It can automatically and quickly transmit user-created content. It mainly addresses and locates through the telephone number of the receiver, so that MMS communication can be carried out between terminals. At the same time, MMS also supports email addressing, so it can transmit information between the terminal and email. MMS information can transmit multimedia information including pictures, sounds, video clips, etc. in addition to the familiar text content of short message service.

text message

SMS is the most popular information technology at present. Since the birth of GSM, it has been determined as the standard of GSM. Through it, mobile phones can send and receive short messages to each other, and the content of short messages can be text, numbers or binary non-text data (used for ringtones or logo, etc.). ).

The implementation principle of short message is simple, but the process of inputting text on mobile phone is more troublesome. SMS has two outstanding advantages:

The first is the store-and-forward mechanism. Sending data packets by SMS is done by the short message center in the mobile network instead of the end user. If the user is not in the service area, the short message is stored in the short message center and forwarded to him after the user appears, which is not available in GPRS and other services.

The second is the delivery confirmation mechanism. In the circuit-switched data environment, the connection is end-to-end, so users can know whether the connection is completed and the data transmission situation. However, in the GPRS environment, the terminal connected to the GPRS bearer is always on, and it is always ready to send or receive data transparently (relative to the user). In this way, the task of checking whether the data packet is sent successfully falls on the user, and the corresponding cost will be higher for each packet data service.

express mail service (EMS)

EMS can integrate simple tones, pictures, sounds, animations and words, and then display them on EMS mobile phones. For example, when an exclamation point appears in a message, you can play related tones, or display simple black and white pictures, text and sound effects at the same time.

EMS is an enhanced version of SMS, which also uses signaling channel to store and forward messages through short message center. The implementation principle is similar, and there is no need to upgrade the basic network. Because the short message center supports UDH, the upgrade from SMS to EMS is transparent, and the implementation of EMS has little impact on the existing short message center.

The biggest transformation that EMS needs to make to the existing SMS center is the operator billing system. After all, EMS and SMS belong to different types of business. The capacity of an EMS message may be several times that of SMS, and some words in EMS occupy much more space than SMS, so the pricing strategy should not be "one size fits all". In this case, the short message center needs to add some modules to record the relevant technical values and generate the corresponding call details.

Multimedia Messaging Service

Through MMS, mobile phones can send and receive multimedia messages, including text, sound, images and videos. MMS supports mobile phone greeting cards, mobile phone pictures, mobile phone screensavers, mobile phone maps, business cards, cartoons, interactive videos and other multimedia services.

MMS will continue to develop with the evolution of GSM, and GPRS, EDGE and 3G can all be its carriers. Related supporting technologies (such as Bluetooth, WAP, MExE, SyncML) will strongly promote the development of mobile Internet, and the most important thing that follows is that enterprises will change from competition to cooperation, which will greatly promote the healthy development of the whole industry and help to make a big market cake. In addition, we will see many new multifunctional devices, such as MP3 mobile phones.

Network equipment manufacturers regard multimedia messaging as an inevitable evolution process of message service from SMS to EMS and finally to mobile multimedia. According to their idea, as long as the mobile phone number is used as the addressing means, messages of different solutions can be communicated from terminal to terminal, from terminal to Internet, and from Internet to terminal.