Communication system
AssigneeMitsubishi Electric Corporation
InventorsYasuhiro ONAKA, Miho MAEDA, Mitsuru MOCHIZUKI, Taisei SUEMITSU, Noriyuki FUKUI
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Abstract
A communication system includes a base station configuring an energy saving cell (ES cell) and a base station configuring a compensation cell (Comp cell). The ES cell is switchable between a switch-on state and a switch-off state. The Comp cell compensates for the coverage of the ES cell when the ES cell is in the switch-off state. Before the Comp cell starts compensating for the coverage, for example, before the ES cell decides to switch itself off in Step ST2101, in Step ST2201 for example, the base station configuring the ES cell notifies the UE being connected with the ES cell of the information about a Comp cell, for example, a Comp cell list.
Claims3
1:
- A communication system, which comprises base station devices and a communication terminal device capable of radio communication with said base station devices, wherein
- said base station devices include
- an energy saving base station device configuring an energy saving cell capable of switching between a normal operation state and an energy saving state with power consumption lower than that of said normal operation state, and
- a compensating base station device configuring, when said energy saving cell is in said energy saving state, a compensation cell that compensates for a coverage being a range in which said energy saving cell is capable of communication, and
- said energy saving base station device notifies said communication terminal device being connected with said energy saving cell of information about said compensation cell before said compensation cell starts compensating for said coverage.
2:
- The communication system according to claim 1, wherein when switching from said normal operation state to said energy saving state is decided, said energy saving cell broadcasts, to said communication terminal device in a coverage of its own cell, broadcast information indicating that its own cell is not selectable as a cell targeted for communication.
3:
- The communication system according to claim 1, wherein when switching is made from said energy saving state to said normal operation state, said energy saving cell decides, in accordance with a criterion for deciding a priority of said communication terminal device that has requested connection, the priority of said communication terminal device and performs a process for connection with said communication terminal device in a descending order of the priority decided.