Resource ReserVation Protocol (RSVP) is a QoS
signalling protocol developed by IETF for fixed networks.
However, in mobile networks where mobile nodes are freely
moving, the standard RSVP is inadequate. There is substantial
number of published works aiming to support RSVP mobility.
Our contribution in this paper is to explore further the proactive
context transfer scheme [6] in the context of RSVP state
reestablishment. As shown in the paper, the proactive scheme is
well suited to RSVP state reestablishment. We also suggest the
concept of deferred reestablishment to increase the probability
of resource availability during the proactive reestablishment
process. Finally, we analyse the cost and benefits of state
reestablishment in terms of wasted resources (we express the
resources as a product of bandwidth and time and call it
bandwidth-time in the paper) to confirm the effectiveness of our scheme.