Home » Electronic News » China Telecom, ZTE and Qualcomm took the lead in completing the 40MHz bandwidth dynamic spectrum sharing interoperability test verification in the commercial 2.1GHz (n1) frequency band

China Telecom, ZTE and Qualcomm took the lead in completing the 40MHz bandwidth dynamic spectrum sharing interoperability test verification in the commercial 2.1GHz (n1) frequency band

Posted by: Yoyokuo 2022-11-15 Comments Off on China Telecom, ZTE and Qualcomm took the lead in completing the 40MHz bandwidth dynamic spectrum sharing interoperability test verification in the commercial 2.1GHz (n1) frequency band

In the 2.1GHz (n1) band 40MHz bandwidth 5G NR and 4G/5G Dynamic Spectrum Sharing (DSS) field trials jointly organized by China Telecom and China Unicom, network and chip manufacturers, Qualcomm Technologies and ZTE announced that they have The first to complete the 4G/5G dynamic spectrum sharing interoperability test verification based on the commercial 2.1GHz (n1) frequency band. This test verification is based on the 40MHz bandwidth in the 2.1GHz (n1) frequency band shared by China Telecom and China Unicom, using ZTE’s 5G base station and equipped with Qualcomm Snapdragon? The smartphone-sized mobile test equipment of the X60 5G modem and RF system has been completed, and it has been successfully verified that the use of dynamic spectrum sharing technology has greatly improved the NR downlink peak rate compared with the statically configured 20MHz LTE+20MHz NR. At the same time, according to the operator’s deployment plan, the existing network is equipped with Qualcomm Snapdragon? Smartphones and other types of terminals in the X55 5G modem and RF system will also have 4G/5G dynamic spectrum sharing capabilities through software upgrades.

Compared to 4G, 5G is designed to support a wide range of frequency bands, including high-frequency mmWave (above 24GHz), mid-band (1-6GHz), and low-band (below 1GHz), and can support both TDD and FDD deployment modes . How to deploy 5G based on the frequency band currently used by 4G LTE without affecting the performance of 4G LTE users has become an important issue faced by global operators, and dynamic spectrum sharing technology can effectively solve this problem. It is a new cellular feature introduced in the 3GPP Rel-15 standard release, capable of supporting 5G NR and 4G LTE operating simultaneously on the same frequency band/channel. Dynamic spectrum sharing technology can also dynamically allocate spectrum resources between 5G NR and 4G LTE according to users’ real-time data needs.

The 2.1GHz FDD frequency band used by China Telecom for 4G LTE deployment has good frequency band advantages and coverage capabilities. Using dynamic spectrum sharing, China Telecom can introduce 5G in the 2.1GHz frequency band currently used for 4G deployment, accelerate its 5G deployment in an economical, fast and efficient way, while improving the mobile experience and cell coverage performance of its 4G and 5G users. After this function is deployed, 4G and 5G terminals can access 2.1GHz at the same time, the user experience of 4G terminals is not affected, and the 5G user experience is improved.

At present, the Ministry of Industry and Information Technology has clearly allocated 2*40MHz (1920-1960MHz/2110-2150MHz) in the 2.1GHz (n1) frequency band to China Telecom and China Unicom for 5G network deployment. In the context of the co-construction and sharing of 5G wireless networks between China Telecom and China Unicom, the 2.1GHz (n1) frequency band will have 2*40MHz FDD bandwidth, which can further improve the service experience of 5G users.

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