Abstract:
PURPOSE: A system and method for monitoring a road slope collision are provided to take prior measures before a section is collided by predicting possibilities of a road slope collision based on underground information of the road slope. CONSTITUTION: A method for monitoring a road slope collision is as follows. Underground information of a road slope is measured. Whether the measured underground information is exceeded a critical value of the underground information based on possibilities of a road slope collision or not is confirmed. If the measured underground information is exceeded the critical value, an inclination of the road slope is measured by driving a sensor. If the measured inclination of the road slope is exceeded a critical inclination value, the road slope is decided to be collided.
Abstract:
본발명은 IP 패킷전송시스템에관한것으로서, 제1외부망으로부터네트워크 ID가다른수신자 IP(Internet Protocol)주소를포함하는 IP 패킷을수신하여, 상기수신된 IP 패킷의수신자 IP 주소에대응하는 MAC(Media Access Control) 주소를요청하는 ARP(Address Resolution Protocol) 요구패킷을생성하여전기적인연결관계의사설망을통해송신하고, 상기 ARP 요구패킷에대응하는 ARP 응답패킷을수신하여, 상기수신된 IP 패킷을상기수신된 ARP 응답패킷에포함되어있는송신자 MAC 주소로송신하는제1게이트웨이와, 상기사설망을통해상기제1게이트웨이로부터상기 ARP 요구패킷을수신하여, 상기 ARP 요구패킷의타겟(target) IP가전기적인연결관계의제2외부망의 IP주소또는네트워크 ID와일치하는경우, 자신의 MAC 주소를이용하여응답하는 ARP 응답패킷을생성하고, 그생성된 ARP 응답패킷을상기제1게이트웨이로송신하며,상기제1게이트웨이가제1외부망으로부터수신한 IP 패킷을상기제1게이트웨이로부터수신하고, 그수신된 IP 패킷을상기제2외부망으로송신하는제2게이트웨이를포함한다. 이러한본 발명에의해, 사설망에서네트워크 ID가다른외부망으로 IP 패킷을전송함에있어서, IP 상위계층을거치지않고 IP 패킷을전송할수 있다.
Abstract:
PURPOSE: A gateway device and IP packet transmitting system using the same are provided to reduce the traffic of an IP higher layer and to increase the transmission speed of an IP packet. CONSTITUTION: A first gateway(110) transmits a received IP packet to a transmitter MAC(Medium Access Control) address within a received ARP response packet. A second gateway(120) receives an ARP request packet from the first gateway through a private network(150). A target IP of the ARP request packet transmits the ARP response packet to the first gateway. The second gateway receives the IPl packet from the first gateway. The second gateway transmits the received internet protocol packet to the second external network.