公开(公告)号：US20230071454A1

公开(公告)日：2023-03-09

申请号：US17985162

申请日：2022-11-11

Applicant: SoftBank Corp.

Inventor： Takashi TSUTSUI ,  Ayumu YABUKI

IPC: H04N21/4363 ,  H04B7/0456 ,  H04N21/431 ,  H04W72/04

Abstract: In accordance with increasing communication demand, means for efficiently providing mass downstream communication at a low cost are desired. Accordingly, a communication system providing supplemental downlink as well as multicast communication comprising a display control device for causing a display unit to display a video, and a communication terminal having an image capturing unit for directly capturing the video displayed by the display unit or capturing a video projected or reflected on a wall surface or the like is provided, wherein the display control device includes a video acquiring unit, a region identification unit, a video generating unit, and a display control unit, and the communication terminal includes a region identification unit, a decoding unit, and a mechanism for communicating a control signal for supplemental downlink by the above-described optical communication using means other than optical communication (means such as WiFi, mobile data communication or the like).