To provide an on-vehicle communication device and mobile communication system for suppressing inability to acquire information included in a transmission signal to be transmitted from a mobile body existing within a reception range.SOLUTION: An on-vehicle communication device 100 includes: an information acquisition determination section 24 for determining whether at least one position information has been acquired among packets received during a reception period; a transmitter large-number determination section 18 for determining that a large number of mobile transmitters 1 exist within a reception range 50 when a frequency of determination that position information has not been acquired exceeds a predetermined threshold; a reception sensitivity reduction section 19 for reducing reception sensitivity by a predetermined value when it is determined that a large number of the mobile transmitters 1 exist within a reception range 50; a dangerous mobile body determination section 20 for determining whether a dangerous mobile body exists from position information received after reduction of reception sensitivity; and a transmission frequency request section 21 for allowing a mobile body that is not the dangerous mobile body to transmit a transmission frequency reduction request to a transmission section 12.SELECTED DRAWING: Figure 1
【課題】受信範囲内に存在する移動体から送信される送信信号に含まれる情報を取得できないことを抑制する車載通信装置および移動体通信システムを提供する。【解決手段】車載通信装置100は、受信期間に受信したパケットのうち、少なくとも1つの位置情報を取得できたか否かを判断する情報取得判断部24と、位置情報を取得できなかったと判断された回数が所定の閾値を超えた場合、受信範囲50内に、移動体送信機1が多数存在すると判断する送信機多数判断部18と、受信範囲50内に、移動体送信機1が多数存在すると判断された場合、受信感度を所定値低下させる受信感度低下部19と、受信感度を低下させた後に受信した位置情報から、危険移動体が存在するか否かを判断する危険移動体判断部20と、危険移動体でない移動体に対して、送信頻度低下要求を送信部12に送信させる送信頻度要求部21とを備える。【選択図】図1
ON-VEHICLE COMMUNICATION DEVICE AND MOBILE COMMUNICATION SYSTEM
車載通信装置および移動体通信システム
2019-02-07
Patent
Electronic Resource
Japanese
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