| 摘要 |
PURPOSE:To secure data transmission reception by using a relay station for inter-mobile-terminal data communication using a single frequency channel and interposing plural relay stations for the frequency hopping system. CONSTITUTION:When a data transmission request comes from a mobile terminal body section 1, a radio LAN adaptor section 2 is in the standby state through a frequency channel 1. When an idle state of the channel 1 is detected, a transmission request packet composed by a communication controller 6 is sent. When a relay station 20 detects the transmission request packet from the mobile terminal 1, the station 20 relays the transmission request by the same channel and sends it again. When a mobile terminal 2 receives the transmission request packet from the mobile terminal 1 or the relay station 20, the terminal 2 sends a reception enable packet as soon as the channel 1 is idle. The relay station 20 relays the reception enable packet and sends it again. Upon the receipt of the reception enable packet, the mobile terminal 1 send a data packet through the channel 1 immediately and the relay station 20 relays the packet to finish the communication. |
