Frequency diversity

摘要

This invention discloses a method for transmitting a radio signal and a method for receiving a radio signal, in which an idle time slot on another carrier within a present cell, which corresponds to a time slot of a carrier occupied initially by a user, is used for diversity transmission/reception of a signal of the user when a link quality of the user is below a preset lower threshold, and the idle time slot on the another carrier occupied by the user is released when the link quality of the user is above a preset upper threshold. The invention also discloses a system for transmitting a radio signal and a system for receiving a radio signal. With the invention, the link quality of the user can be improved with network resource saved.