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Title : IP Mobility and the CDMA Radio Access Network:
Applicability Statement for Soft Handoff
Author(s) : J. Kempf, P. McCann, P. Roberts
Filename : draft-kempf-cdma-appl-00.txt
Pages : 12
Date : 03-May-00
Recently, there have been a variety of proposals submitted to the
Mobile IP Working Group and to other IETF working groups for IP
mobility solutions that seek to enhance or replace mobile IP. These
proposals, often characterized as micromobility or fast handoff, are
addressed primarily at the perceived need of multimedia sessions such
as video or voice over IP for faster handoff between radio base
stations, and are primarily directed at real time multimedia traffic
in 3rd generation cellular access networks. In this paper, we discuss
the design of CDMA radio access networks (RANs) and the applicability
of IP mobility to soft handoff in a CDMA RAN. We attempt to show that
given current IP routing algorithms and the constraints on a CDMA
RAN, IP mobility solutions have little, if any, role to play in
handoff within the RAN. In contrast, an IP mobility solution is
likely to play a big role in fast handoff between RANs, also called
hard handoff. While future developments in IP networking may change
this situation, IP mobility in CDMA networks currently seems to apply
only when the mobile node roams between RANs rather than between base
stations within a RAN.
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