DATA COMMUNICATION METHOD BETWEEN SHIP AND LAND BY UTILIZING AN ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS SUB-CHANNEL CLASSIFIED BY GROUP AND SELECTIVELY ALLOCATED IN A NAVIGATION IDENTIFIER AND A LAND INTEGRATION BASE STATION

摘要

PURPOSE: A data communication method between ship and land by utilizing an OFDMA sub-channel is provided to overcome a limited frequency resource in the environment where the number of ships increases and to efficiently avoid collision of important data of ships.;CONSTITUTION: If a navigation identifier receives a plurality of maritime communication data carried in an OFDMA sub-channel of a plurality of group As, the navigation identifier confirms the existence of a repeatedly used OFDMA sub-channel in the OFDMA sub-channels of a plurality of the group As. If there is an OFDMA sub-channel with collision, the navigation identifier modulates maritime communication data carried in the collided OFDMA sub-channel with an OFDMA sub-channel in a group B and transmits the data to a land integration base station.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) OFDMA sub-channel; (BB) Sub-channel group A; (CC) Sub-channel group B; (DD) OFDMA sub-channel selector