Name: draft-ietf-avt-hc-mpls-reqs-03
Title: Requirements for Header Compression over MPLS
State: Pending
Authors: Jerry Ash, Bur Goode, Jim Hand, Raymond Zhang
Group: Audio/Video Transport (avt)
Date: 2004-08-25
VoIP typically uses the encapsulation voice/RTP/UDP/IP. When MPLS labels
are added, this becomes voice/RTP/UDP/IP/MPLS-labels, where, for example,
the packet header is at least 48 bytes, while the voice payload is often no
more than 30 bytes. Header compression can significantly reduce the
overhead through various compression mechanisms, such as enhanced
compressed RTP (ECRTP) and robust header compression (ROHC). We consider
using MPLS to route compressed packets over an MPLS LSP without
compression/decompression cycles at each router. This approach can increase
the bandwidth efficiency as well as processing scalability of the maximum
number of simultaneous flows that use header compression at each router. In
the draft we give a problem statement, goals and requirements, and an
example scenario.
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