Short message technology

Short message technology was first applied to European GSM system in 199 1. At first, it used ﹙Point-to-point logic (-point pointing; ). Sm-PP belongs to GSM 3.40 system. On the GSM version 3.4 1, SMS evolved into a point-to-multipoint service (﹙cell-broadcast；; ); SMS-CB﹚ (Short Message Broadcasting Service) enables senders (individual users, enterprises, advertisers, etc.) to. Send text messages to multiple people at the same time, or automatically send text messages to mobile phone holders when they enter a specific area.

A short message can hold 140 bytes, that is, about 160 7-bit characters or 140 8-bit characters, while Chinese characters, Korean characters and Japanese characters account for 2 bytes and can hold 70 characters. (using Unicode system). These do not include additional system information.

Short message service is the most popular mobile phone service at present. In 2004, it was estimated that about 50 billion short messages were sent every year in the world (almost 1 people may send 100 short messages). If the charge per SMS is about $0.65438 +0 yuan RMB, telecom operators will benefit from it by $5 billion. In 20001year, only 25 billion short messages were sent, while in 2000, only1700 million short messages were sent, which increased quite rapidly. According to statistics, SMS is particularly popular in Asia, Australia and Europe, and even a new verb "Texting" (meaning users who only communicate through SMS) has been developed in English. In Chinese mainland,-{zh-cn: SMS; Zh-tw: Short messages are often called "short messages", which bring the most profits to telecom operators. In 200 1 year, the number of short messages sent exceeded 654.38+08 billion. A considerable number of people who love SMS are young people in metropolitan area, and telecom operators also provide them with a particularly cheap SMS charging scheme. For example, in Australia, each short message costs only 0.2 to 0.25 Australian dollars, but the cost of voice mail jumps from 0.4 yuan Australian dollars to 2 yuan Australian dollars per minute.