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Dense deployment of many small cells is one promising solution to cope with mobile traffic increases. However, the deployment needs many optical fibers and network operators require efficient management for these cells. To overcome these issues, we have proposed a WDM-PON system managed by an electrically embedded pilot tone and confirmed its feasibility. In this letter, we compare management methods...
A WDM-PON system managed with an electrically embedded pilot tone to accommodate mobile fronthaul is proposed. Experimental results show a 128 kb/s pilot tone can be inserted into the low frequency area of CPRI signals with negligible insertion penalty.
This report discusses using the new SiC-MOSFETs in a front-end DC-DC converter for distributed power systems. In such an application, high efficiency and high power density are the major driving factors that naturally require a high switching frequency. The SiC-MOSFET is widely considered a desirable switching device for the high-frequency power conversion/inversion circuits due to its high voltage,...
The Geo-fencing technology is one of M2M services and useful in various scenes, such as the monitoring system in prisons and nursing homes. Because these service assuming the use of the mobile terminals with the battery limit, the electric power saving is needed for the Geo-fencing technology. In this paper, we propose an effective power saving method of Geo-fencing technology.
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