Wang Shengling,Huang Jianhui,Hou Yibin
(School of Electronics and Information Engineering,Xi'an Jiaotong University,Xi'an 710049,China)
Abstract:A novel scheme of seamless handoff in MPLS-based mobile IPv6 network is proposed,which shortens the handoff latency by confining the re-establishment range of the label switching path (LSP) and decreases the packet loss rate by bicasting data to the mobile host-during its switching.An algorithm for quickly finding the lowest common point of two paths through which mobile host (MH) sends packets before and after switching is presented to minimize LSP re-establishment latency and bicasting redundancy.In addition,the hierarchical mobile IPv6 and two layer's trigger information are utilized in the scheme to shorten the delay time of registration and router discovery,which further speeds up the switching.Both simulation and theoretic analyses show that the handoff latency in the proposed scheme is shorter than that in the existing scheme,and our scheme is a good solution for highly mobile users．
Keywords:cross router;label switching path re-establishment;bicasting; seamless handoff