| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a marine mobile communication apparatus which improves a physical distance capable of constructing a network by increasing the number of stations capable of being subscribed to the network in a spurious manner. <P>SOLUTION: A time division multiple access (TDMA) system and a code division multiple access (CDMA) spectrum spreading system are used, respectively, for the purpose of constructing networks and the assignment of time slots in the networks is determined by the TDMA system. A first network has its own original first spreading code and in present station transmission, spectrum spread transmission is performed by the first spreading code original for the network. A subscriber station of the first network is capable of being subscribed to a second network, and the second network has its own original second spreading code different from the first spreading code. In present station transmission, spectrum spread transmission is performed by the second spreading code original for the network, and timing of transmission from the present station is determined to a different time in accordance with the assignment of time slots in the first network and the assignment of time slots in the second network. <P>COPYRIGHT: (C)2008,JPO&INPIT |
