A method, performed by a caller peer device, comprising: determining a volumetric video compression scheme for a volumetric video to be transmitted for a volumetric video communication service in a mobile communication system; transmitting a first message comprising first media parameters for the determined volumetric video compression scheme to a callee peer device; receiving a second message comprising second media parameters from the callee peer device in response to the transmission of the first message; and transmitting a compressed volumetric video that is compressed according to the second media parameters to the callee peer device, characterized in that at least one of the first or second message comprises: first attribute line information indicating that media data of the volumetric video is produced using the volumetric video compression scheme and is transmitted through a plurality of media sessions, second attribute line information comprising media parameters describing an entirety of the plurality of media sessions; third attribute line information indicating a media attribute value of a first media session among the plurality of media sessions; first media line information describing a media type, a port number, protocol, and a media format of the first media session related to the third attribute line information; and at least one piece of fourth attribute line information comprising media parameters of the first media session related to the first media line information. determining a volumetric video compression scheme for a volumetric video to be transmitted for a volumetric video communication service in a mobile communication system; transmitting a first message comprising first media parameters for the determined volumetric video compression scheme to a callee peer device; receiving a second message comprising second media parameters from the callee peer device in response to the transmission of the first message; and transmitting a compressed volumetric video that is compressed according to the second media parameters to the callee peer device, characterized in that at least one of the first or second message comprises: first attribute line information indicating that media data of the volumetric video is produced using the volumetric video compression scheme and is transmitted through a plurality of media sessions, second attribute line information comprising media parameters describing an entirety of the plurality of media sessions; third attribute line information indicating a media attribute value of a first media session among the plurality of media sessions; first media line information describing a media type, a port number, protocol, and a media format of the first media session related to the third attribute line information; and at least one piece of fourth attribute line information comprising media parameters of the first media session related to the first media line information. first attribute line information indicating that media data of the volumetric video is produced using the volumetric video compression scheme and is transmitted through a plurality of media sessions, second attribute line information comprising media parameters describing an entirety of the plurality of media sessions; third attribute line information indicating a media attribute value of a first media session among the plurality of media sessions; first media line information describing a media type, a port number, protocol, and a media format of the first media session related to the third attribute line information; and at least one piece of fourth attribute line information comprising media parameters of the first media session related to the first media line information. <EOS>