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Introduction
Local 5G refers to a system in which users such as companies and local governments that are not telecommunications carriers construct a dedicated 5G network in some areas such as their own buildings or premises.
Since it is different from the 5G network that telecommunications carriers have spread throughout Japan, it can be used without depending on telecommunications carriers. Therefore, in addition to being able to set and control the performance adjustment of the 5G network relatively flexibly according to the application, it has the advantage of being less susceptible to external communication failures and disasters because it is a self-owned network. For example, remote control of construction equipment at construction sites, smart factories, infrastructure monitoring for disaster prevention and disaster response, smart agriculture, etc. Some companies and local governments are using local 5G to demonstrate commercial use. Experiments are in progress.
In local 5G, there are many usage needs that want to secure a large amount of throughput in the upstream direction (for example, users who want to upload and use high-definition video in real time), and a TDD (Time Division Duplex) pattern with a high ratio of upstream slots has been realized. At the same time, we are receiving more and more requests to consider introducing quasi-synchronous TDD, which can simplify interference coordination.
Semi-synchronous TDD
The 5G networks provided by telecommunications carriers are operated using the synchronous TDD method, which matches the transmission/reception timing of base stations and terminals. Initially, local 5G was only synchronous operation, but asynchronous operation was introduced to support various use cases of local 5G. (* As a general rule, synchronous stations are protected preferentially over asynchronous stations.)
Quasi-synchronous TDD is a method that partially changes only the uplink/downlink slot pattern while keeping the timing of the slots the same as that of synchronous TDD in order to simplify interference adjustment for asynchronous operation.
Source: Promotion of local 5G, etc. by Ministry of Internal Affairs and Communications (Ministry of Internal Affairs and Communications) https://www.soumu.go.jp/main_content/000739007.pdf
Thundercomm's commitment to local 5G
Thundercomm has a product lineup of 5G compatible communication module TurboX™ T55 SOM equipped with Qualcomm® Snapdragon™ X55. In addition, using the TurboX™ T55 SOM evaluation board, Thundercomm has already verified connection communication with a local 5G base station. Both synchronous TDD and semi-synchronous TDD are verified. In connection verification with semi-synchronous TDD, it was confirmed that the upstream throughput improved as expected. (*If you are interested in the verification results, please contact us.)
In addition, Thundercomm has FAE members for 5G product support in its Japanese subsidiary, and we are also collaborating with local 5G labs, so that customers can evaluate local 5G using TuboX™ T55 SOM. We have established a system that enables us to provide appropriate advice in this regard.
Local 5G Lab Achievements:
・Tokyo Industrial Technology Research Center
・SHARP Local 5G Trial Field
・OPTAGE 5G LAB
Such
TurboX™ T55 Development Kit (5G Sub-6GHz)
TurboX™ T55M SOM - M.2
Check here for Thundercomm's 5G products.
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