Abstract: Provided is a compact base station apparatus (HeNB) whereby frame timing can precisely be synchronized between HeNB and MeNB, thereby suppressing the interference in an upstream channel. In HeNB (100), which forms a cell smaller than a cell formed by MeNB, frame timing detecting unit (111) detects, based on a sync signal received from MeNB, the frame timing of MeNB; a control unit (116) uses the frame timing of MeNB to set the frame timing of a downstream channel in HeNB (100); a transmission RF unit (118) transmits, in accordance with the frame timing of the downstream channel in HeNB (100), a preamble to MeNB; and a TA command extracting unit (114) acquires, from a response signal responsive to the preamble, information indicating a difference in frame timing between MeNB and HeNB (100).

Abstract: Provided is a compact base station apparatus (HeNB) whereby frame timing can precisely be synchronized between HeNB and MeNB, thereby suppressing the interference in an upstream channel. In HeNB (100), which forms a cell smaller than a cell formed by MeNB, frame timing detecting unit (111) detects, based on a sync signal received from MeNB, the frame timing of MeNB; a control unit (116) uses the frame timing of MeNB to set the frame timing of a downstream channel in HeNB (100); a transmission RF unit (118) transmits, in accordance with the frame timing of the downstream channel in HeNB (100), a preamble to MeNB; and a TA command extracting unit (114) acquires, from a response signal responsive to the preamble, information indicating a difference in frame timing between MeNB and HeNB (100).

Abstract: An in-vehicle apparatus is connected with a portable terminal to enable communications. The in-vehicle apparatus then acquires an ID code of the portable terminal and opens a log file corresponding to the ID code, registering a record describing a vehicle compartment environment, etc. When the vehicle compartment is under an abnormal environment (high temperature, high humidity, or strong vibration environment), a record describing a duration of the abnormal environment is registered in the log file. In addition, when an operation anomaly occurs in the portable terminal or the vehicle compartment is under the abnormal environment, a record describing an operation state of the portable terminal is registered in the log file. Furthermore, when the connection between the portable terminal and the in-vehicle apparatus is released, a record describing a duration of the connection is registered in the log file.