Information and Communication

Project investment exceeds 10 billion: Radio and television 700MHz frequency clearing plan is about to be released

来源: 发布时间:2019-11-27 12:59 我要评论 Author: From: Date: 2019-11-27 12:59 I want to comment

With the launch of 5G packages by three operators, 5G of radio and television will also officially arrive. According to Zhao Jingchun, chairman of China Radio and Television during the World 5G Conference on November 21, China Radio and Television is expected to officially launch 5G commercial personal services in 2020.

As everyone knows, China Radio and Television has been holding the 700MHz spectrum resource known as the "golden band" as an agent. Radio and television officially must start the wireless network business with 700M frequency clearing work.
According to the introduction by Gao Yang, senior engineer of the Wireless Research Institute of the State Administration of Radio and Television Planning and Broadcasting, during the "Fifth World Television Day-China Television Conference" event on November 21, the Planning Institute of the General Administration has been commissioned by China Radio and Television to develop 700M frequency clearing solution.
Gao Yang believes that because VoNR on 5G is not yet mature, calls will also fall back to 4G to be implemented with VoLTE, so the 700M band must meet the needs of building 4G and 5G networks at the same time. It can be implemented by dynamic spectrum sharing, that is, DSS.
DSS is mainly used because the static spectrum configuration cannot dynamically adjust the service segment, which is likely to cause insufficient congestion resources in one system and low idle utilization in the other system.
The upcoming radio and television 5G network will have a distinctive feature of radio and television. It integrates media dissemination, mobile communication operations, smart radio and television bearers, intelligent Internet of things, national public services, and green security supervision. It interacts with and cooperates with cable television networks. New radio and television media service network and new national informatization basic network.
总体 General line of 5G technology of radio and television:
1. Cooperative coverage at low and medium frequencies. 700M can be used to deploy a wide coverage network. Because the current industrial chain is not mature enough at 4.9G and will likely cover indoor hotspots, it must be shared with a mature mid-band in the future;
2, 700M frequency band FDD system, other frequency band TDD system, in order to achieve dual-mode collaborative network deployment;
3. Establish a 5G SA network for broadcasting. Radio and television does not have 4G network construction, and only SA networking can reflect the characteristics of 5G low latency in the future, so radio and television will definitely use SA networking directly;
4, radio and television 5G minimal network. Since radio and television has no infrastructure for mobile communication networks, it is a disadvantage compared with operators, but this also makes radio and television no longer have historical burdens, so in the future, it can directly choose to build a minimalist network.
▍The characteristics of 5G minimal network in the future will be reflected in the following four aspects:
1. Minimal site: Through highly integrated antennas that support multi-band, multi-standard, and other equipment, unified access in multiple ways is achieved;
2. Minimal architecture: Decouples services from the physical network through an end-to-end flat and flexible network architecture, adapts to different business scenarios on a network, and allocates network resources as needed;
3. Simple protocol: By implementing a unified end-to-end network protocol, the original multiple old protocols are transformed into a scalable unified protocol in the field of transmission and core network.
4. Minimal operation and maintenance: By changing the old business development and operation model, network operation and maintenance can be automated and intelligentized.

▍So what services will the 5G network of radio and television carry?

1. Interactive broadcasting and television business, which is also the current main industry of radio and television, including live broadcast and on-demand of radio and television programs, as well as on-demand and download of various network audio-visual content;
2. Mobile communication services, including basic mobile communication services and value-added services such as mobile voice, data, and short messages. Although there has been a saying that 5G of radio and television should focus on 2B business, this does not mean that it will not be involved in 2C business. In the absence of available number resources, the recently released number portability policy is of great significance for the development of 2C business of 5G in radio and television;
3. High-tech video services, that is, "high-format, new concepts" video services. "High Format" refers to video that combines high-tech formats such as 4K / 8K, 3D, VR / AR / MR, high frame rate, high dynamic range, and wide color gamut; "New Concept" refers to novel image language and vision Experienced innovative application scenarios;
4. Converged media cloud broadcast control business refers to the aggregation of content resources and traffic resources of cable television networks, radio and television stations, IPTV and OTT broadcast control platforms to provide users with new Internet media services.
5. The Internet of Everything business carries business applications in the fields of government affairs, commerce, education, medical care, transportation, energy, tourism, finance, smart cities, smart homes, and smart parks, which are also known as 2B services;
6. Public services, such as public safety, emergency communications, emergency broadcasting, theme promotion, public welfare information, etc.

700M frequency clearing scheme is about to be formed

When radio and television was formally approved to enter the field of mobile communications, one of the topics that the radio and television and telecommunications industries are generally concerned about is the issue of 700M spectrum. China Radio and Television still determines the reuse of 700M resources to deploy 5G. Therefore, 700M frequency clearing has once again become many industries People focus. This time, Gao Yang, a senior engineer at the Wireless Research Institute of the State Administration of Radio and Television Planning and Broadcasting Research Institute, revealed some issues regarding 700M clearing.
Gao Yang also said that prior to the deployment of 700M 5G networks by China Radio and Television, 700M frequency clearing has become a top priority. What is 700M clear frequency? That is to achieve the migration of 700M band live analog terrestrial television and terrestrial digital television services.
It is reported that the Planning Institute of the General Administration has been entrusted by China Radio and Television to be responsible for the formulation of the 700M frequency cleaning plan.
The plan is implemented in accordance with the "All Digital Frequency Planning Plan" formulated by the General Administration of the People's Republic of China. The core principle is to meet the requirements of standard definition, high definition, ultra high definition, and mobile TV services. Approved terrestrial digital television frequencies. In addition, during the frequency clearing process, it is necessary to ensure the safe broadcast of the broadcast television programs, and the original channels can only be shut down after the migration of the channels is completed.
The frequency clearing work will inevitably bring about large changes in ground analog and ground digital transmitters. After statistics, the entire project investment exceeds 10 billion yuan, and the workload is huge. Given the imminent 5G network construction, the frequency clearing work is still the current priority. Weight.

China Radio and Television sets a global benchmark with 700M

Radio and television 5G will be a 5G network based on international common standards and using mature commercial equipment, but there are also some personalized needs.
According to reports, China Radio and Television will get at least 30Mx2 of spectrum resources at 700M, and currently each operator in this band has only a maximum of 10Mx2 of resources. Therefore, according to the original 3GPP R15 standard, 700M terminals / base stations only support a maximum bandwidth of 20M. To achieve greater bandwidth, only carrier aggregation can be achieved, but the complexity is high.
At present, after China Telecom and China Unicom announced that they will jointly build and share, there will be 200M resources continuously, but in view of the 3GPP standard, it can only be achieved through the aggregation of two 100M carriers.
China Radio and Television was approved at the 3GPP RAN Plenary in September this year. The goal is to support 700M terminals in Rel.16, which will be frozen early next year, to meet the uplink and downlink 30M bandwidth, and the base station uplink 30M / downlink 40M bandwidth. This means that in the future, the global 700M 5G product ecological chain will support the large bandwidth mode in the Rel.16 version, which can improve the user's peak rate experience, and also allow radio and television 5G to gain attention in the global telecommunications field and use the 700M spectrum resources in the world. China set a new benchmark.

Radio and television will jointly build and share resources with an operator

According to the introduction, in the future, radio and television will cooperate with an operator to use MOCN to achieve co-construction and sharing, that is, co-construction and sharing on the wireless access side, and connect to their core networks through the bearer network.
On the wireless access side, the shared carrier mode is used, and the base station broadcast will form two PLMNs to distinguish the respective users.

The 700M first builds and shares, and will also share the mid-band of friends, such as 2.6G, and finally deploy 4.9G when the industry matures.
In terms of the bearer network, although radio and television have certain optical fiber resources, they are basically not to the base station. Under the premise of co-construction and sharing, the core of the 5G metro access convergence will directly share the resources of friends and merchants.
5G has high requirements for the bandwidth and delay of the bearer network, so it is still uncertain whether the current provincial and national backbone networks can meet the requirements. The other two operators provide segmented bearer networks, which will also cause great obstacles to network slicing. Therefore, this part of the province and the country should be shared.
In the end, Gao Yang said that in the future, radio and television will independently build a 4G / 5G converged core network. The core network QoS and slicing of the two operators need to be managed uniformly.


Editor-in-chief: Qi Xu
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