On November 21st, at the seminar on innovation and development of smart radio and television, Du Baichuan, deputy director of the Science and Technology Committee of the State Administration of Radio, Film and Television, shared the topic “Wisdom, Radio and Television needs 5G and blockchain and other advanced technologies”. He also listed the district. The blockchain is used in applications that integrate smart parking systems, smart power, identity wallets, slice authentication, automated ad trading, and publishing five scenarios.
The following is a compilation of Du Baichuan's live speech, which cuts down some technical details and is covered by Babbitt.
The two words to be discussed today are of great concern to everyone. One is 5G and the other is blockchain.
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The future of a smart society has come
First of all, let's look at the background of the times, the age shift of the main audience, the mutual influence of technology and consumption habits is changing how to produce, access and consume, which in turn affects the whole society.
First, the growth of the global middle class, the demand for convenience, advanced education, and high-quality consumption will increase significantly, especially in emerging countries. Second, the importance of millennials will increase, and will require convenience, unforgettable experience, and The technical business of accessing content; third, the aging of the world's population, leading to increased demand for health care, wear, entertainment and geriatric education; Fourth, the trend of urbanization will require media to provide specialized design for people to commute and work hard. .
Changes in the social economy require a building of a smart society. About "Smart Society," MIT Professor Pentland wrote in his book "Wisdom Social and Social Physics Big Data":
"Social physics focuses on exploring the existence form, evolution direction, travel rate, performance intensity, mutual relationship, response degree, feedback characteristics, sensitivity and stability of the generalized 'flow', thus delineating the 'natural-society-economy' complex The space-time behavior and trajectory of the giant system seeks its internal mechanism and control points, and effectively supports the decision-making and management of major issues such as politics, economy, military and society with the support of computer and network tools."
That is to say, by means of big data and other means, it is possible to obtain amazing productivity improvement and improvement of prediction accuracy only by studying the information exchange mode in the social network without knowing the specific content of any information.
We can divide the smart society into three spaces: the first is physical space, including the power grid, communication network, broadband, Wi-fi, 5G, Internet, Internet of Things, car, people, industry; second The level is expression, mobility, privacy, and security; the third is social space, family, community, city, politics, economy, and country.
The role of broadcasting and television in a smart society
So, what is the role of broadcasting and television in a smart society? We have just said that the three dimensions of physics, society and information depend on intelligence and wisdom to reduce the difference. What is the method we use? Public opinion detection, public opinion leads to a variety of wisdom and digital economy. What is the basic means? Includes big data, edge computing, cloud computing, artificial intelligence, and blockchain. In other words, using these means to identify these three levels, reduce differences and friction, and finally form our smart society.
It turns out that radio and television does not have a 5G license and can only do unlicensed spectrum Internet of Things. Now that Radio and Television has a 5G license, it should make full use of the advantages of 700MHz to speed up the construction of the spectrum and Internet of Things authorized by the broadcasting and television. I feel that to build a very complete 5G network, one or two years will definitely be completed. But we must note that the Internet of Things does not have to use the entire network, it has a private network. For example, in a factory or park, its Internet of Things can be connected to the outside world. It can be either the Internet of Things connected to the Internet or the Internet of Things without the Internet.
There is a research report on LoRaWAN and NB-LOT. The deployment of LoRaWAN and NB-LOT networks is relatively light, with rapid growth worldwide, and there will be enough space for the development of large-scale IoT applications on both sides. It has the advantages of low price of equipment, network architecture and network access, deep coverage and low power consumption in the building.
However, in the near term, LoRaWAN has significant advantages over NB-IoT, with a mature supplier ecosystem, certified IoT devices, and end-to-end solutions that are currently ready for implementation. However, the adoption of LoRa WAN in China will also adopt unlicensed spectrum, with uncertainties in Sino-US trade warfare, power limitation of unlicensed spectrum, and demand for national secrets.
Blockchain is the supporting technology of smart broadcasting
Let us introduce the blockchain technology. The representative of blockchain 1.0 is bitcoin . In addition to the ledger, Blockchain 2.0 adds a program to execute automatically, called a smart contract. Blockchain 3.0 is not only smart contracts, but also interoperability.
Bitcoin is a digital currency that is created, spent and traded digitally in the Bitcoin ecosystem. In the Bitcoin system, the user is represented by an address, similar to a bank account number. Bitcoin accounts are anonymous and addresses are created using public key ciphers. The owner of the address is the owner of the private key, which corresponds to the public key used to create the address. Therefore, the private key is a proof that the specific address belongs to the user. The private key must be protected because the loss of the private key means that the certificate that the address belongs to the user is lost and directly results in the inability to use the bitcoin in the account.
There are four main types of blockchain systems since Bitcoin:
One is the public unlicensed blockchain, in which everyone in the blockchain system can participate in the consensus mechanism of the blockchain. In addition, all people with Internet connections around the world can trade and view complete transaction logs, such as Bitcoin , Litecoin, Ethereum , and public licensed blockchains , which allow everyone with an Internet connection to do so. Trade and view the transaction log of the blockchain, but only a limited number of nodes can participate in the consensus mechanism, such as Ripple, private Ethereum;
The third is private licensed blockchains that limit the ability to trade and view transaction logs to participating nodes in the system, and the architecture or owner of the blockchain system can determine who can participate in the blockchain system and Which nodes can participate in the consensus mechanism of the blockchain system, such as Rubix, Hyperledger; the fourth is the private unlicensed blockchain. Although the consensus mechanism is open to anyone, these blockchain systems are limited to those who can trade and view the transaction log. Such as (partial) Exonum.
From the perspective of the development of the Internet, the development of the blockchain may be divided into four phases: First, the blockchain phase is enabled, which includes two basic parts of distributed and encrypted, and can also be used as a non-blockchain solution, for example. To improve the operational efficiency of the distributed data management system; the second is the prototype blockchain phase, which includes distributed, encrypted and unchangeable between 2012 and 2020. It usually provides an experimental rather than an overall implementation, focusing on generating greater efficiency by streamlining existing processes;
The third is the complete blockchain phase, which includes all five components by 2023, providing the full value of the blockchain. At present, startups focus on this level of maturity and expect to gain momentum in the market; the fourth is to strengthen the blockchain stage, which will combine the complete blockchain solution with AI and IoT solutions to further enhance the blockchain. The functionality and security.
5 application cases of blockchain technology
I will give a few examples to illustrate the application of blockchain in physical "wallets", identification, asset tags, etc.
1. Integrated intelligent parking system based on blockchain
We also made an integrated smart parking system for broadcasting and television, but we have not added a blockchain. With the blockchain, you can book on the spot and invoice on the spot.
2. Smart power based on blockchain
We have also done smart meters, but we have not used blockchains yet. What are the benefits of having a blockchain? Many homes install solar panels on the roof, and they can output in both directions when they are not in use. For example, if a power generator outputs electricity, he will get the token, and it can be exchanged for money. It can be spent elsewhere. Just like WeChat, I can buy things, and I can withdraw them. The electricity people form a closed loop.
3. Identity wallet
Previously, the identity was managed by the central node, and the identity chain based on the blockchain was my message. For example, on the left side of the above figure, the bank, the hiring department and the government department have proved that Zhang San’s credit score exceeds 700, there is no arrears, and there is a working citizen. This is the information given by the hiring department; married, over 21 years old, female This is the information given by the government department; there are various authorities to verify your information. When you go to the bank to apply for a loan, you don't need all the information, you can borrow, you can manage your own information.
4. Slice authentication based on federated chain
Our 5G, often said to slice, but there is a problem with the slice. Inter-slice communication needs to be securely protected. The establishment of a secure channel can be implemented by digital certificate technology. However, the slices of different operators usually use certificates issued by different CAs. Mutual authentication cannot be achieved until CA mutual trust is established. For example, we have four major operators in 5G. I am connected and sliced. You ran to the mobile place. What should I do with this slice? Therefore, we must unify the alliances of these four operators, unified billing, unified authentication, and unified slicing. With resource allocation, this is likely to form a slice for any of our occasions.
5. Automatic block trading and publishing based on blockchain
We have an advertisement here, the amount is not bad, how to charge, negotiation can not be automated. With the blockchain, I have listed all the parameters of the advertisements, including public evaluation agencies, advertising publishers, and advertising providers, including miners, users, and personalized advertisements. This can also be combined with smart contracts, buyers, sellers, ratings, surveys and payments in a blockchain.
Finally, I feel that in our radio and television, we must accelerate the application of 5G and blockchain technology in smart broadcasting.