Wireless communication is the fastest developing field in the field of communication , The most active area of Technology . Wireless communication is a kind of communication without using any connection （ Such as wire , Cable or any physical medium ） How to transfer information from one point to another .
Usually , In a communication system , Information is sent from the transmitter to a receiver placed at a limited distance . With wireless communication , The transmitter and receiver can be placed within a few meters （ Such as TV remote control ） Thousands of kilometers （ Satellite communications ） Anywhere in between .
We live in a world of communication and wireless communication , Especially the key parts of our lives . In our daily life , Some common wireless communication systems include ： mobile phone ,GPS Receiver , The remote control , Bluetooth audio and Wi-Fi etc. .
The communication system can be wired or wireless , The medium used for communication may be guided or non guided . In wired communications , Media is a physical path , For example, coaxial cable , Twisted pair cables, fiber optic links, etc , It guides the signal from one point to another .
This type of media is called the leading media Guided Medium. On the other hand , Wireless communication does not require any physical medium , But it can transmit signals through space . Since space allows only signal transmission without any guidance , Therefore, the medium used in wireless communication is called non bootstrap medium .
If there is no physical medium , So how does wireless communication send signals ？ Even if cables are not used in wireless communications , The transmission and reception of signals can also be accomplished through the antenna .
An antenna is an electrical device that converts electromagnetic waves into radio signals , vice versa . These electromagnetic waves travel through space . therefore , The transmitter and receiver are made up of antennas .
The future development path
Now ,5G Business is in its second year , The leaders in the wireless industry have been interested in 5G The future of wireless networks has been coveted for a long time . 5G Americas Announced the release of 《 2020 Years later, mobile communications – 5G The next generation G Evolution of 》 white paper , The white paper details the global work of a number of academic and industry organizations , And put forward 5G towards “ The next generation ” Potential use cases and technologies essential to evolution .
5G Americas President Chris Pearson Express ：“ 5G Now in the second inning of nine innings , Its future innovation path is huge . however , The mobile wireless industry is undergoing transformation . Although the epidemic has not yet been eliminated , But the digital industry is still changing , therefore , It is necessary to study the next generation mobile cellular wireless technology .”
although 5G It's still early in the life cycle , But through 3GPP Standards are constantly updated , It's important for the Internet , Architecture , These enhancements in technology and standards will penetrate into 3GPP Release 17 And higher . however , It is expected that in the next few years , international telecommunications union （ITU） The upcoming International Mobile Telecommunications 2030（IMT-2030） Will outline the requirements for next generation mobile wireless .
Early ideas around the next generation of wireless use cases may involve tactile or tactile communication , High resolution terahertz spectrum for imaging and sensing uses , Network physical systems in manufacturing and scenarios for enhanced public security and national security applications .
This 5G The white paper covers three main themes ：
? Looking back at North America and the world 5G Other activities
? How communication will be in 2020 Changes have taken place since the 1990s , It includes several use cases
? How North America can establish and maintain a leading position in the future communication standards
AT＆T Assistant Vice President of standards and Industry Alliance and head of the white paper development working group Brian Daly Express ：“ Many are identified as 'Next G' and '6G' The project is going on all over the world ,5G Americas And made some contributions . In the U.S. , Business entities , Government and academic institutions need to be at the forefront of these next-generation developments .”
T-Mobile Director of industry forum and relations Mark Lipford Comment on ：“ 5G It will bring more options for business innovation , But in the next decade , consider ITU by IMT The vision and goals set are also very important .”
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