| 摘要 |
<p>PURPOSE:To make the efficiency of data transmission by the data transmission for a radio section high by varying the transmission speed according to a line state and distinctively combining and using FEC (error correction encoding system) and ARQ (automatic request resend system) as an error control system. CONSTITUTION:An inter-working device 6 is connected to a mobile communication switching network 3 and equipped with an interface part 61 which sends and receives a wire signal from a fixed network 2 or a radio signal from a mobile station 5n, a protocol conversion part 63 which converts the wire signal into a radio signal and converts the radio signal into a wire signal, a storage part 64 which previously stores information regarding the transmission speed and error control system, and a control part 62 which selects and controls the transmission speed and error control system according to the line state of the radio section.</p> |
