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A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Multi-Class PPP with Channel Preemption and Dynamic
Author(s) : M. Nunes
Filename : draft-nunes-pppext-mcp-00.txt
Pages : 7
Date : 17-Jun-02
This document defines the encapsulation and mechanisms that allows PPP
packets to be transported over low-bitrate links such as modem lines,
ISDN B-channels, and sub-T1 links with guarantee of quality of service
for time sensitive services. A mechanism of channel preemption is
defined, allowing the immediate occupation of the channel with the most
priority packet, resuming the transmission of the lower priority frame
without need to retransmit the octets already sent. This mechanism
allows a dynamic packet fragmentation, guaranteeing simultaneously a
low transmission delay for the services more sensitive to transmission
delays and an efficient channel occupation. It is a recursive
mechanism, which means that the packet that made the channel preemption
can itself be preempted by another higher priority packet, and this
process can be repeated whenever a higher priority packet requests
transmission. The proposed mechanism is compatible with existing
hardware and drivers for asynchronous and synchronous HDLC controllers.
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