First, the original communication.
Before the Shang Dynasty, writing did not appear, so communication was almost entirely based on yelling. Before and after the Spring and Autumn Period and the Warring States Period, the writing became more mature. Flying pigeons, post stations and bonfires were the most popular methods at that time.
Although it was simpler than it is now, it was a big step forward at that time.
Although the ages were far apart, it was not until thousands of years later that the postal service was invented by westerners.
Second, power communication.
Electricity, as its name implies, is the use of a large number of instruments that work with electricity.
The invention of electric power brought the history of human communication into a new era.
1832, Russian diplomat Schilling made a telegram that used galvanometer pointer to deflect the received information.
1835 Samuel Le, USA. Samuel Morse successfully invented the world's first electromagnetic telegraph. Now, "on", "off" and "length" replace human words for transmission, which is the famous Morse code.
1875, Scottish youth Alexander. Bell invented the first telephone in the world. And applied for an invention patent in 1876. 1878, the first long-distance telephone experiment was conducted between Boston and new york, which are 300 kilometers apart, and it was successful.
This is the first telephone. ...
Motorola was founded in 1928. During World War II, it signed a contract with the United States War Department to help it develop wireless communication tools. 194 1 year, Motorola developed the first cross-era product SCR-300, which is still the classic image of the American signal soldier in the film.
It was not until 1984 that the first generation of mobile phones invented by the famous American inventor martin lawrence cooper entered the consumer market. Since then, human communication has entered the era of wireless mobile, which is a bit of the shadow of mobile phones and an excessive connection with the era of global intelligent mobile.
3- Global Connected Intelligent Mobile Era
The earliest "mobile phone" was 1992 26 years ago. IBM released Simon Personal Communicator, the world's first smart phone, and used a full touch-screen smart phone for the first time, paving the way for the development of modern smart phones. Take a photo with his 15-year-old iPhone:
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With the upgrading of products from telegraph to smart phone, mobile communication has developed from military materials to an indispensable communication tool for everyone in modern society, and it has also given us great pleasure in life.
From slow to high speed, from clumsy to light, from expensive to cheap, mobile phones have made great contributions to the development of communication methods.
Fourth, the future.
Personal communication is the highest goal of human communication. It is a new communication method, and users can communicate with anyone at any time and any place by using all possible network technologies.
① Use a unique personal communication number (PTN) that has nothing to do with the network to identify users. Users can establish connections across multiple networks and charge each other, regardless of geographical location. Personal communication numbers are used in wired and wireless systems.
② The network providing personal communication is a seamless network with huge capacity, which is integrated by multiple networks (including land, ocean and space networks) by various technical means. So no matter where the user is, he can find it or be found by the other party.
(3) Fixed users or mobile users can use wired or wireless access networks to obtain communication services anywhere.
(4) It has the ability to provide various services, and the network can provide various services according to the personal wishes and requirements of users.
⑤ The mobile terminal is ultra-small, easy to carry and low in energy consumption, and can be used for several weeks after charging.
This is the ultimate goal of human communication.
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