METHOD OF EFFICIENT SPECTRUM REUSE AND MANAGEMENT AND COMMUNICATION SYSTEM FOR MARINE TELEMATICS USING AIDS TO NAVIGATION

摘要

PURPOSE: A method for efficiently reusing and managing a frequency by utilizing a seaway mark identification device for marine telematics is provided to supply a frequency reuse method and a frequency utilization method between users in an integrated model which is connected to a land mobile communication system based on OFDM(Orthogonal Frequency Division Multiplexing). CONSTITUTION: A frequency is divided corresponding to distance and is reused. The frequency is assigned to a seaway mark identification device with a CR(Cognitive Radio) function to be reused. A frequency, which use frequency is low, and another frequency which interference is not reached are utilized as a CR frequency. The frequencies are assigned per timeslot. The frequencies are reused in the whole frequency environment. [Reference numerals] (AA) Land integrated system using an OFDMA communication system; (BB) Seaway mark identification device having a cognitive radio function; (CC) Cognitive radio(CR) network; (DD) Frequency reuse in a cognitive radio concept; (EE) Ship B-CR user