COMMUNICATION SYSTEM
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Abstract
In a communication system of the present invention, a HeNB measures interference in Step ST41 in an energy saving mode. When judging to have detected the interference by a UE during communication with an eNB in Step ST42, the HeNB cancels the energy saving mode and moves to a normal mode in Step ST43 and starts issuing a pilot signal in Step ST44. When the UE judges to have detected the pilot signal in Step ST23 and reports the judgment results to the eNB in Step ST24, in Steps ST25 to ST32, a handover process from the eNB to the HeNB is performed for the UE.
1 Citation
3 Claims
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1. (canceled)
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2. A communication system, which comprises a communication terminal device, a large-scale base station device that configures a large-scale cell having a relatively large range in which said large-scale base station device is configured to perform radio communication with said communication terminal device, and a small-scale base station device that configures a small-scale cell having a relatively small range in which said small-scale base station device is configured to perform said radio communication, said small-scale cell being installed in said large-scale cell, wherein
said small-scale base station device has two operation modes of a normal mode and an energy saving mode and is capable of shifting from said normal mode to said energy saving mode and shifting from said energy saving mode to said normal mode, said small-scale base station device performing a transmission operation for a downlink transmission signal to be transmitted to said communication terminal device and a reception operation for an uplink transmission signal transmitted from said communication terminal device in said normal mode, said small-scale base station device stopping at least said transmission operation in said energy saving mode, and in said energy saving mode, said small-scale base station device performs a detection operation of detecting interference against the own device and, upon detection of the interference by said communication terminal device during communication with said large-scale base station device, shifts from said energy saving mode to said normal mode.
Specification