Wireless communication system switching method in software defined radio and software defined radio

摘要

PPROBLEM TO BE SOLVED: To provide a method of seamlessly and rapidly switching communication between different kinds of wireless communication systems. PSOLUTION: The method of seamlessly switching communication between the wireless communication systems by using a software wireless apparatus including a plurality of CPUs and FPGAs is provided. One of the CPUs and one of programmable electronic element groups measure a value of a communication state while carrying out present wireless communication. When the value is deteriorated more than a first threshold value, a program of the present wireless communication system is written to the other CPU and the other FPGA for searching a communicable wireless communication system of a next object. When the wireless communication system of the next object is found out, the software wireless apparatus is on standby in that state, and when the value of the present communication state is deteriorated furthermore than a second threshold value, the present wireless communication system is switched into the wireless communication system of the next object. PCOPYRIGHT: (C)2006,JPO&NCIPI