Frequency switching method and apparatus for radio data system

摘要

A method and an apparatus for switching from the main frequency to an Alternative Frequency (AF) providing the same station is provided. The method includes measuring a received signal strength of a main frequency, receiving at least one alternative frequency list, establishing an accumulated alternative frequency list including all previously received alternative frequency lists, comparing the received signal strength of the main frequency with a predefined reference received signal strength, and attempting, when the received signal strength of the main frequency is less than the reference received signal strength, switching to an alternative frequency in the accumulated alternative frequency list.

主权项

1. A frequency switching method for a radio data system, the method comprising:
measuring a received signal strength of a main frequency; receiving at least one alternative frequency list periodically; creating an accumulated alternative frequency list including all previously received alternative frequency lists; comparing the received signal strength of the main frequency with a predefined reference received signal strength; and attempting, when the received signal strength of the main frequency is less than the reference received signal strength, switching to an alternative frequency in the accumulated alternative frequency list in sequence, wherein the attempting of the switching of the alternative frequency comprises deleting the accumulated frequency list when the received signal strength of each of the alternative frequencies in the accumulated frequency list is less than a predefined valid received signal strength.