NTT Docomo's Cell On Wheels (COW)

Yagisawa Dam (矢木沢ダム) is a dam in the Gunma Prefecture of Japan; it supports a 240 MW hydroelectric power station. 

はじまったよ！#みなかみ3ダム春の点検大放流2023 #八木沢ダム pic.twitter.com/b4KBtaMUxB

— yuki-to (@okada_shokai) May 21, 2023

Between May and June, test release of water is done to check that the emergency spillway gate is working fine. On these occasions, many tourists visit to experience this. There may be mobile coverage there but there isn't capacity to support large number of people. 

天端に到着
今年もドコモさんの移動基地局車が来て活躍しています#八木沢ダム pic.twitter.com/LDzmEJ36dp

— ひで (@hidemasu_) May 21, 2023

To alleviate the network congestion, many Japanese networks send their Cell On Wheels' (COWs) to handle the traffic. NTT Docomo's COW is as shown above.

NTT Docomo 5G COW https://t.co/qEQY7FpzU7

— 3G4G (@3g4gUK) March 20, 2022

Another COW with mmWave radios is shown above. 

Related Posts: 

• Connectivity Technology Blog: NTT Docomo's Disaster Countermeasures to Keep People Connected
• Telecoms Infrastructure Blog: NTT Docomo Expands Open vRAN Options in its 5G OREC
• Telecoms Infrastructure Blog: NTT Docomo's 5G Network is based on 'Open RAN' Principles
• Telecoms Infrastructure Blog: NTT Docomo's 5G RAN Infrastructure
• Telecoms Infrastructure Blog: Docomo 5G Open Innovation Cloud
• Telecoms Infrastructure Blog: NTT Docomo's Underground LTE Small Cells with possibility to deploy 5G in future
• Free 6G Training: Human Augmentation Through 6G Network
• Free 6G Training: Nokia's and Docomo's Joint Keynote at EuCNC & 6G Summit 2023 on '6G getting into next gear'
• Free 6G Training: NTT Docomo and SK Telecom lay out Common Requirements for 6G