Mitsubishi Electric Corporation

Futoshi Katada

Mitsuru Mochizuki

Kuniyuki Suzuki

Hirochika Hiraki

Miho Maeda

Taisei Suemitsu

Yasuhiro Onaka

Yozo Fukuda

A communication system is provided that can improve the communication capability of a communication terminal device in the case where a large number of small cells in addition to a macro cell are installed and operated. A communication terminal device (UE) is connected with a macro cell configured by a MeNB and a small cell configured by a SeNB, so that dual connectivity is performed. When receiving information for small cells, for example, emergency information from a CBC via an MME, at least one cell of the macro cell and the small cell notifies the communication terminal device connected with the at least one cell of the information for small cells.

Communication system

Communication system and base station

In a communication system of the present invention, a HeNB measures interference in Step STin an energy saving mode. When judging to have detected the interference by a UE during communication with an eNB in Step ST, the HeNB cancels the energy saving mode and moves to a normal mode in Step STand starts issuing a pilot signal in Step ST. When the UE judges to have detected the pilot signal in Step STand reports the judgment results to the eNB in Step ST, in Steps STto ST, a handover process from the eNB to the HeNB is performed for the UE.

In a communication system, a HeNB measures interference in an energy saving mode. When judging to have detected the interference by a UE during communication with an eNB, the HeNB cancels the energy saving mode and moves to a normal mode and starts issuing a pilot signal. When the UE judges to have detected the pilot signal and reports the judgment results to the eNB, a handover process from the eNB to the HeNB is performed for the UE.

Growing community of inventors

Tokyo, Japan

Futoshi Katada