发明名称 |
In-vehicle apparatus |
摘要 |
An in-vehicle apparatus for performing a short range communication with a road side apparatus, which performs a hybrid communication including a broadcast communication and a point-to-point communication, is disclosed. The in-vehicle apparatus includes a communication unit and a retry count determination unit that determines whether a count of failure to establish the communication in an activation channel in the communication unit reaches a preset retry count. The in-vehicle apparatus re-selects a communication frequency when the retry count determination unit determines that the count of failure to establish the communication in the activation channel reaches the preset retry count. |
申请公布号 |
US8954027(B2) |
申请公布日期 |
2015.02.10 |
申请号 |
US201113199626 |
申请日期 |
2011.09.06 |
申请人 |
Denso Corporation |
发明人 |
Yamada Teruya;Kaneko Ryuta |
分类号 |
H04W76/00;H04W4/00;H04W76/02;H04W4/02 |
主分类号 |
H04W76/00 |
代理机构 |
Harness, Dickey & Pierce, PLC |
代理人 |
Harness, Dickey & Pierce, PLC |
主权项 |
1. An in-vehicle apparatus for performing a short range communication with a road side apparatus that performs a hybrid communication including a broadcast communication with multiple unspecified vehicles and a point-to-point communication with a specific vehicle of the multiple unspecified vehicles, the in-vehicle apparatus comprising:
a communication unit that performs communication with the road side apparatus; a frequency selection unit that selects a communication frequency, which is a preset frequency for the short range communication; a start notification determination unit that determines whether, during the hybrid communication, the communication units has received a point-to-point start notification of the point-to-point communication within a preset time period after the communication unit received a broadcast start notification of the broadcast communication; and a frequency re-selection unit that re-selects the communication frequency when the start notification determination unit determines that the communication unit has not received the point-to-point start notification of the point-to-point communication within the preset period of time after the communication unit received the broadcast start notification of the broadcast communication. |
地址 |
Kariya JP |