A method for signaling a PDU set RTP header extension (HE) may include negotiating use of the RTP HE between an AS and an AF. The method may include generating, by the AF, an RTP HE ID and transmitting, by the AF, the RTP HE ID to the AS. The method may include transmitting, by the AS, the RTP HE ID to the AF. The method may include transmitting, by the AF, a usage of the PDU set RTP HE to the NEF, and transmitting, by the NEF, the PDU set RTP HE to the PCF. The method may include constructing, by the PCF, a PCC rule including PDU set RTP HE usage information, and transmitting, by the PCF, the PCC rule to the SMF. The method may include transmitting, by the SMF, PDU set RTP HE usage information to the UPF.