During the forum of “China Radio and television 5g conference” held in the morning, Feng Jingfeng, vice president of the radio and television Planning Institute of the State Administration of radio and television, attended the conference and delivered a keynote speech entitled “Some Thoughts on the development of radio and television 5g”.
On June 6, 2019, the Ministry of industry and information technology officially issued 5g business licenses to the three major operators, China Radio and television, which not only marks the first year of 5g business in China, but also marks a milestone in the development of China’s Radio and television industry. 5g is coming, how should radio and television deal with it? In Feng Jingfeng’s view, 5g is not only a challenge, but also an opportunity. The opportunity is greater than the challenge. Radio and television people should embrace 5g with a positive attitude.
With the development of 5g technology, on the one hand, it can provide more than 1G Internet access speed, at the same time, it can provide millisecond delay, and reach millions of connections within 1 square kilometer. Therefore, based on these technologies, 5g has three application scenarios: one is to enhance the mobile broadband communication service, namely broadband Internet; the other is to enhance the mobile broadband communication service; Second, massive machine communication services, mainly related to the Internet of things; The third is ultra-high reliability and low delay services, which focus on the Internet of vehicles, industrial Internet and other fields.
So, what is 5g broadcasting? As the name suggests, it is based on 5g technology. At present, 5g broadcasting adopts mobile multimedia, multicast technology, that is MBMS.
After the establishment of 3GPP, 3G standard was launched in 2001, 4G standard in 2009 and 5g standard in 2018. In the evolution of these standards, in addition to communication standards, broadcasting technology is also evolving. 5g broadcasting first appeared in 3G era, and rel-4 version proposed multimedia and multicast services. With the development of technology and the progress of the times, in the 5g era, the rel-16 version at the end of 2019 ends the development of 5g broadcasting technology. Today’s 5g broadcast, commonly known as ENTV, is almost the same as the traditional broadcast technology. It also supports SFN. The maximum delay of SFN supported by 5g broadcast reaches 400us, which can form a wide range of SFN. It is also a typical broadcast application mode.
What is the performance parameter comparison between 5g broadcasting and traditional DTT standard? 5g broadcasting and traditional DVB-T, DTMB, atsc3.0 all adopt OFDM technology; In terms of channel capacity, taking 8m bandwidth as an example, the bit rate of 5g broadcast transmission in 8m bandwidth is 1m ~ 33m.
In addition, the performance of 5g broadcasting is compared with that of traditional terrestrial digital TV. In the case of the same megabit ratio performance, such as 16K mode and the same C / N, 5g broadcast data rate loses about 20% – 30% compared with DVB-T2; In 32K mode, the loss is about 30% – 40%. In terms of channel capacity and efficiency, 5g broadcasting is slightly worse than traditional broadcasting because it adds a lot of delay and corresponding error correction measures.
Some functional comparisons between 5g broadcasting and traditional DTT standards, such as SFN networking capability, mobile reception capability, high bit rate transmission under the same C / N, etc.
If we only discuss 5g communication and 5g broadcasting in the future, we will not be able to achieve a goal that radio and television want. Therefore, on this basis, the introduction of terrestrial digital television broadcasting, to build a real 5g development of radio and television system architecture, but also take into account the joint application of large screen and small screen. Based on the architecture of 5g broadcasting and communication, as well as terrestrial digital TV, the final realization of the formation of 5g media convergence communication platform.
In the future radio and television 5g media convergence communication platform, it is the structure of big tower + small tower, in which the big tower is the traditional digital terrestrial TV, and the future 5g broadcasting and communication can also be deployed on the big tower, while the small tower is based on the existing 5g broadcasting + communication technology. Through the big tower + small tower, we can achieve the real radio and television 5g media convergence communication platform in the wireless environment. Through this platform, we can send and receive signals to different media and terminals such as mobile phones, iPads and large screens. Similarly, based on the radio and television 5g media convergence communication platform, we can really achieve “mobile priority”.
Broadcasting and television 5G media convergence and communication platform is a mobile communication platform for convergence media, and ultimately achieves the goal of convergence media “everyone Tong, mobile link and terminal link”, which is in line with general secretary Xi Jinping’s “mobile priority” strategy.
What are the business types of radio and television 5g media convergence communication platform? In terms of spectrum utilization, in the future, China Radio and television will use 4.9g + 700m spectrum in the development of 5g communication, on which enhanced mobile broadband services, ultra-high reliability and low delay services will be deployed. It can also promote 5g broadcast service based on 600m. In addition, in order to improve the spectrum efficiency more efficiently, for example, mass machine communication service can be deployed in 400m / 500m frequency band.
The above business types of radio and television 5g media convergence communication platform are generally assumed.
The future development of radio and television 5g business application is the top priority. With the network and platform, how to carry out business is the most critical. Compared with the traditional three operators, the future of radio and television 5g can be divided into three aspects
Traditional business: provide voice communication and mobile Internet based on 5g communication network.
5g + business of radio and television: compared with the other three operators, China Radio and television is relatively weak in infrastructure construction and business carrying capacity, so it is necessary to give priority to the application of vertical industries, such as smart city, smart industry, smart agriculture and Internet of vehicles.
Characteristic business of radio and television: Based on the existing advantages of radio and television in content production, it can provide high-tech video and bring the ultimate experience to users. Another characteristic business is 5g TV broadcasting, which can broadcast TV live to mobile phones through 5g technology, and build a dedicated 5g emergency broadcasting system on 5g broadcasting network, which is also an important development direction of the country during the “14th five year plan”.
Finally, Feng Jingfeng listed the application cases of radio and television 5g integrated communication platform, namely the construction of county-level integrated media. On August 22, 2018, general secretary Xi Jinping delivered an important speech at the National Conference on propaganda and ideological work. We should do a solid job in the construction of county-level financial media centers to better guide and serve the masses. We should take a clear-cut stand, adhere to the truth, take a firm stand and refute fallacies. In order to promote the construction of county-level financial media, the Propaganda Department of the CPC Central Committee and the State Administration of radio, film and television successively promulgated five construction standards for county-level financial media from the end of 2018 to 2019.
Through the exploration of the construction of county-level financial media in recent two years, there are some good development cases. The necessary condition for the development of county-level financial media is the need for a media convergence communication platform. The media services, Party building services, government services, public services and value-added services of county-level financial media need to be realized through the communication + broadcast mode. For example, through 5g communication network to achieve media services, 5g broadcast network to achieve media services based on small screen, at the same time through the terrestrial digital television network to achieve large screen media services, so the media convergence communication platform is the future development direction of radio and television 5g, and can better help the development of county-level financial media.
Editor in charge: Tzh