A RTP sequence number associated with a compressed RTP packet is determined based on the determined relationship and at least one of {HEAD ~ the RLP sequence numbers} of the received RLP packet or {TAIL ~ packets} forming the compressed RTP packet 
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A RTP sequence number associated with a compressed RTP packet is determined based on the determined relationship and at least one of { HEAD ~ the RLP sequence numbers } of the received RLP packet or { TAIL ~ packets } forming the compressed RTP packet
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH