Enhanced PPP link re-establishment using context transfer
draft-nakhjiri-seamoby-ppp-ct-00.txt Motorola Inc.
Many of today’s networks use PPP as a means of providing access links to remote users. In case a PPP user is mobile and performs a subnet handover, it needs to tear down and re-establish of its PPP link with the network. PPP link re-establishment is an elaborate procedure (as explained in a later section of this document) involving multiple messages. This will lead in an extended service disruption as due to the round trip time involved in the messaging as well extensive radio bandwidth usage. Of this reason, we consider PPP to be a prime candidate for context transfer [1-3]. The proposal in this document can reduce the number of PPP establishment messages by 50%-100. Furthermore, it will save significant amount of time in PPP state machine transitions, due to the multiphase nature of PPP. Reliability and timing issues of PPP context transfer are also discussed.