Abstract: A wireless communication system is mounted on a moving body, and includes a wireless communication unit, a terminal identification (ID) reader, an operation receiver, a moving body state detector, a communication permission list, and a controller. The wireless communication unit transmits and receives information to and from the wireless terminal. The terminal ID reader reads, from the wireless terminal, ID information that identifies the wireless terminal. The operation receiver receives a specific operation from a user. The moving body state detector detects an operation state of the moving body. The communication permission list stores the ID information of a wireless terminal that is permitted to communicate with the wireless communication unit.

Abstract: A network system includes a transmitting apparatus; a transmission path; a relaying apparatus that receives real time information transmitted through the transmission path; a wireless network; and a receiving apparatus that receives data transmitted through the wireless network. The relaying apparatus has a reference time generating part that generates a reference time independently of the transmitting apparatus; and a network transmitting part that transmits both the real time information received from the transmitting apparatus and the reference time via the wireless network.

Abstract: A network system includes a transmitting apparatus; a transmission path; a relaying apparatus that receives real time information transmitted through the transmission path; a wireless network; and a receiving apparatus that receives data transmitted through the wireless network. The relaying apparatus has a reference time generating part that generates a reference time independently of the transmitting apparatus; and a network transmitting part that transmits both the real time information received from the transmitting apparatus and the reference time via the wireless network.