Transmitting apparatus and receiving apparatus

A receiving apparatus of a communication system at least including a transmitting apparatus and a receiving apparatus, the receiving apparatus comprising:

• multiple received data decoding and decompression units configured to perform, based on one or multiple pieces of header compression and coding configuration information of received data included in a higher layer message, decoding and decompression of the received data, wherein
• first header compression and coding configuration information includes first compression and coding profile configuration for a first communication protocol header,
• second header compression and coding configuration information includes second compression and coding profile configuration for a second communication protocol header,
• a first received data decoding and decompression unit reconstructs the first communication protocol header by decoding and decompressing the received data, based on the first header compression and coding configuration information, and
• a second received data decoding and decompression unit reconstructs the second communication protocol header by decoding and decompressing the received data, based on the second header compression and coding configuration information.