Nowadays we can witness many mobile and IoT devices constituting intelligent environments. The physical status of the real world is obtained with many wirelessly-connected devices and it seems that we can create any arbitrary intelligent environments. However, these devices still have a problem of inflexibility of supplied power; wireless IoT devices tend to necessitate the batteries solely dedicated to them. Therefore, as the number of IoT devices increases, the cost of managing these batteries also increases. To cope with the problem, Ichikawa et al. has developed Virtual Grid Hub (VGHub), where USB-PD-connected devices can alternatively provide and receive electrical power. In this study, we show how to control VGHub connecting personal computers, mobile phones, and portable batteries to maximize the utilization of electrical power taking practical issues into consideration.
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
Tel.: +1 703 830 6300
Fax: +1 703 830 2300 firstname.lastname@example.org
(Corporate matters and books only) IOS Press c/o Accucoms US, Inc.
For North America Sales and Customer Service
West Point Commons
Lansdale PA 19446
Tel.: +1 866 855 8967
Fax: +1 215 660 5042 email@example.com