Embodiments of the disclosure relate to a data processing method, a transmitter, and a receiver. The method includes: determining whether a current radio bearer is an only radio bearer corresponding to an SDAP entity of a receiver; releasing the SDAP entity in case that the current radio bearer is the only radio bearer corresponding to the SDAP entity; releasing a configuration corresponding to the current radio bearer in case that the current radio bearer is not the only radio bearer corresponding to the SDAP entity.