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May 17, 2022
Tokyo - May 17, 2022 - NTT Corporation (TYO: 9432), today, has announced that it has started the world's first verification of the radio space reproduction technology that integrates optical and radio propagations. As the diversifications of both radio communication devices and usage scenarios will continue to progress in the future, new radio system development requires much verification time. The application of the proposed technology will contribute to the efficient verification of radio technologies by reproducing the radio space corresponding to the usage scenarios with high accuracy in the verification environment.
In addition to current smartphones, a wide variety of radio communication devices such as IoT (Internet of Things) devices are becoming more widespread. Furthermore, the communication quality (large capacity, low latency, high reliability, etc.) and usage scenarios required for radio communication systems will be more diverse than ever. The key to the realization of future radio communication systems will be acquiring of a vast amount of verification data for radio communication devices and usage scenarios to meet various requirements. Therefore, the reduction of verification time is an essential factor. One of the existing verification methods is OTA (Over The Air) testing, which aims to verify the performance of radio communication devices in specific radio space. However, OTA testing had challenges in reproducing changes in the radio space in response to the physical movement of the device itself. It also had challenges in reproducing a variety of usage scenarios.
NTT Laboratories has proposed the radio space reproduction technology to reproduce the radio space in a verification environment to address the above issues. The proposed technology considers the radio characteristics of arrival direction, gain, and fading various indoor and outdoor scenarios. It can extend to new scenarios, such as in the sky and space. The radio space reproduction technology consists of the following three elemental technologies (Fig. 1).
As of May 2022, NTT Laboratories has completed the primary part of the next-generation verification environment construction in the Yokosuka R&D Center, and verification of the effectiveness of the proposed technologies has begun (Fig. 2).
The first step is to reproduce a simple scenario in an indoor environment. In addition, we will challenge to reproduce complex verification scenarios, such as the simultaneous use of multiple radio communication systems, through the advancement of variable radio characteristic devices and control technologies.
Figure 1: Overview of radio space reproduction technology.
Figure 2: Next-generation verification environment
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NTT Information Network Laboratory Group
Planning Department, Public Relations Section
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