Comparison of Communication Characteristics for Local 5G Semi-Synchronous Mode for Multiple Robot Control

5G communications have evolved dramatically and are being used for various purposes. Among them, private communication is expected to be suitable for remote control of multiple robots due to features such as eMBB and mMTC among local 5G. In robot interconnection communication, the emphasis is on the time ratio of uplink communication from each node to the server, while general 5G communication focuses on the time ratio of downlink communication, and the time ratio of uplink communication is small, making it difficult to use for multiple robot control. In this paper, experiments were conducted to improve the uplink eMBB and URLLC by allocating more time resources to the uplink, assuming the advantage of semi-synchronous mode in the TDD communication scheme. The experimental environment was justified by comparing the experimental data with the base station logs. The results showed that not only the throughput of the semi-synchronous uplink was improved, but also the throughput of the TCP downlink.