5-g-wireless-technology-19-728This was the first speech I delivered in University of Waterloo. It was also my first technical talk! 

Theme for the event: SE(Software Engineering) Tech Talk
Topic for my speech: 5G
Location: J.R. Coutts Engineering Lecture Hall, University of Waterloo
Date: October 25th, 2016

Hello, everyone! This February, I went to the Mobile World Congress 2016 in Barcelona and experienced the fascinating trends of technology there. Among these trends, I am going to talk about what I have learned about 5G with you today!

First of all, do you know what 5G is? Look, when you unpack your wireless router, you can see there are 2 networks for wifi: 2.4G and 5G. Unfortunately, I am not going to talk about this “5G”. This “5G” is actually 5GHz, generally referring to the network working on the wireless band with the frequency of 5GHz.

Well, the “5G” I am actually want to talk about is 5th generation mobile networks. Take out your cell phone and see the top of the screen: What is above the signal bars? You may see 2G, 3G or 4G, representing different generations, and you might see 5G once the technology turns mature enough to crack the market.

Now I have a question for you: how many of you think that there is an official definition for 5G? Just put up your hand if you think there is. Well, actually, the answer is, not yet, and people are still arguing about the standard for it. However, there do exist consensus that 5G should meet the following requirements: 1-10Gbps connections to end points in the field, 1 millisecond end-to-end round trip delay (latency), 1000 times more bandwidth per unit area and 10-100 times for the number of connected devices.

With 5G, you will be able to have fast Internet connection speeds and consume a large amount of data quantities per month, and there will be more mobile broadband users per unit area. When you are out of reach of wifi hotspots, you can also get access to a fast connection, and the equipment using 5G will demand lower cost, lower battery as well as lower latency.

How can 5G benefit us? With 5G, it may only take 5 seconds to download a movie which needs 5 minutes using 4G network. Therefore, you can browse all kinds of movies in just one day conveniently; also, you will no longer be bothered by the unexpected stop at the climax simply due to the heavy load of the network.What about VR? According to Mark Zuckerberg, “VR will be a killer application of 5G”. It is the high level of speed and security of 5G that is able to help VR to be mature. In a video for the future applications by T-Mobile, a woman sitting in the park is immersed in a 360-degree virtual reality projection of a rock concert happening live somewhere else.

5G is not only beneficial in terms of entertainment, but also for the convenience in our daily life: AT&T has discussed using 5G to connect smart devices such as self-driving cars; it takes about 25 milliseconds for an automatic car to react to the emergency now, but it will just cost 1 millisecond with the aid of 5G. As you might be able to think of, 5G is the key to the development of Internet of Things, which means that computing devices, mechanical and digital machines, objects, animals or people that are provided with unique identifiers are able to communicate over a network. That is the idea for the smart cars, and can be also used for keeping track of your assets, monitoring an aging family member, keeping the plants in your home alive, lighting streets with more efficiency and so on. Without 5G, in no way can they be achieved.

However, we should not ignore the challenges related to 5G. One of them is Inter-cell Interference: There are different sizes of traditional macro cells and concurrent small cells that will lead to interference. Another is the availability of radio spectrum. Though 5G technology has strong computational power to process the huge amount of data from different and distinct sources, larger infrastructure support is in demand. By 2020, 5G will only occupy the spectrum lower than 6GHz due to the technical difficulties and the restriction of the cyberlaw. In addition, there are still debates arguing whether it is necessary to build up the 5G network, when many developing countries in the world are still stuck with 2G or 3G, and the construction for 4G has not been completed yet. According to a survey for enterprises carried out by Telecoms.com (results published on MWC2016), 25% enterprises in the survey say they wish people would stop talking about 5G.

From my perspective, the technology is developing, so is the society. Why not embrace the fascinating technical trend? The theme for MWC2016 is “Mobile is everything”, which is truly inspiring, just by imagining how life will be with he improvement of IoT, high-quality network access anywhere at any time!


Dvolution of mobile generation technology: 1G to 5G and review of upcoming wireless technology 5G


Understanding 5G


5G tutorial


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The First Speech In UW: Tech Talk On 5G

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