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Brief Review of Proposals End-to-End VoIP Header Compression Using cRTP (draft-ash-e2e-crtp-hdr-compress-00.txt) steps use RSVP to establish LSPs between PE1-PE2 use cRTP to compress header at CE1, decompress at CE2 CE1 requests SCIDs from CE2 header compression context routed from CE1 --> PE1 --> P --> PE2 --> CE2 PE1 & PE2 create ‘SCID routing tables’ & perform ‘SCID switching’ for compressed packets (SCID --> MPLS labels’) route compressed packets with MPLS labels PE1 --> PE2 packet decompressed at CE2 using cRTP algorithm advantages minimizes CE requirements (has to route HC context) disadvantages additional PE requirements (need to create ‘SCID routing tables’) |