阅读理解
In 2019, a big revolutionary technology
shift will finally occur, which is called 5g. It is a once-in a-decade upgrade(升级)to our wireless systems that will start reaching mobile phone users
in a matter of months. This new times will leap ahead of current wireless known
as 4g by offering mobile internet speeds that will let people download an
entire 120-minute movie within a second
But this
is not only about faster smart phones, but also will affect many other kinds of
devices, including industrial robots, security cameras, drones(无人机), automatic cars, video games, sports, shopping and traffic data.
With 5g technology, a clearer and truer 3D images will be formed and it can be
off-loaded to other machines wirelessly, freeing users to move and making it
easier to develop goggles(目镜)the size of eyeglasses.
People can point a smart phone camera to a football game and see both live
video on the display and player statistics or other data. Moreover 5g powerful
effects extend to remote medical surgery and other fields that increasingly
rely on high-speed connections.
Officials
in the United States and China regard 5g networks as a heated competitive edge.
It can help spread the use of artificial intelligence and other cutting-edge
technologies. Meanwhile, to get the benefits of 5g, users will have to buy new
phones, while carriers will need to install new communication services, which
will create a huge future market. In order to occupy it first, the famous world
wireless service providers such as AT&T, Verizon, Samsung, Huawei have
already declared that they will enter 5g business and showed their 5g new smart
phones.
However,
in the United States, Verizon and AT&T will offer their 5g service with
first use of high frequencies known as millimeter waves that can pump data at
high speeds, but their signals don't travel as far. Instead Sprint and T-Mobile
plan to start with lower frequencies, whose result may be somewhat slower
initial speed, but wider range, although they all claim that they have mastered
5g technology. Thus they only first target the areas with large population. So
5g's full benefit to all are not expected until the main US key carriers
upgrade their key switching equipment, which may happen in late 2019 or early
2020.