Fast Handover Algorithm Based on DAD-Less Mechanism for Hierarchical
Mobile IPv6
Jia-Bao Fang
China National Digital Switching System Engineering and
Technological Research Center
Zhengzhou 450002, China
2014xdfjb@sina.com
Zhen-Xing Wang
China National Digital Switching System Engineering and
Technological Research Center
Zhengzhou 450002, China
Lian-Cheng Zhang
China National Digital Switching System Engineering and
Technological Research Center
Zhengzhou 450002, China
Abstract—A fast handover algorithm using DAD-Less
mechanism for hierarchical mobile IPv6 was proposed for the
problem of mobile node handover latency by duplicate address
detection in HMIPv6 in order to improve the performance of
handover for HMIPv6. The IP address allocation mechanism
and new interface identifier were used to distribute unique
interface identifier within a domain for the node in the mobile
anchor point, ensuring the uniqueness of the link to address
without the need for the duplicating address detection within
the domain through the stateless auto-configuration
mechanism configuration address. Performance analysis and
the experimental results show that, compared with standard
HMIPv6, algorithm of switching delay reduced by about 90%,
which is more suitable for frequent switching nodes.
Keywords-Hierarchical mobile IPv6; Handover latency;
Duplicate address detection; Interface identifier
I. INTRODUCTION
In order to support mobility management in
next-generation networks, Internet Engineering Task Force
(IETF) began to develop Mobile IPv6 Protocol (MIPv6) in
the end of last century [1]. At present, mobile IPv6 protocol
promotes maneuverability of Mobile Node (MN) in internet
and improves the performance of MN handover. However,
the longer latency in Duplicate Address Detection (DAD)
and banding update makes it unacceptable for some
communication services which require higher Quality of
Service (QoS). Therefore, scholars have put forward many
improved methods, including Hierarchical Mobile IPv6
(HMIPv6)[2], which solved the problem that MIPv6 mobile
node needs frequent registration at Home Agent (HA) and
Correspondent Node (CN) through the Internet hierarchy
classification. But it still adopts the DAD working pattern
of MIPv6, resulting in less obvious optimization of
switching delay and even worse performance than MIPv6 in
the process of MN handover in different Mobile Anchor
Point(MAP)[3].
At present, HMIPv6 research mainly focuses on the
choice of MAP and the analysis of layer division, etc. To be
specific, the literature [4] combined Mobile IPv6 with Fast
Handover (FMIPv6)[5] and HMIPv6 to propose Fast
Handover for Hierarchical Mobile IPv6 (FHMIPv6);
Literature [6] and literature [7] analyzed the influence of
multi-layer HMIPv6 on handover latency by mathematics
method and testbed respectively and pointed out that the
three-layer-HMIPv6 is beneficial to mobile management.
Literature [8] analyzed performance advantages and
disadvantages of FHMIPv6, HMIPv6, Proxy Mobile IPv6
(PMIPv6) and Fast Handover for Proxy Mobile IPv6
(FPMIPv6) through mathematical model; Literature [9]
proposed a cascade tunnel mode in order to reduce
handover latency and signaling load of HMIPv6; and
literature [10] put forward metrics based on QoS
preferences of MNs and QoS abilities of MAPs, in order to
perform a simulative evaluation of the HMIPv6 network
implementation with QoS-aware dynamic MAP selection.
However, the researches of DAD on HMIPv6 are very
few. DAD mode of standard HMIPv6 requires too much
time, which severely impacts MN handover performance.
Literature [11] proposed an Optimized HMIPv6
(O-HMIPv6) algorithm, which is based on homogeneous
prefix concept. The 64 bit IPv6 prefix is divided into two
parts: 48 bit Network Identifier (NID) and 16 bit Subnet
Identifier (SID). The HMIPv6 network is designed in the
way that each AR of a domain adopts the same NID to
ensure the uniqueness of LCoA within the domain so that
DAD is unnecessary in the procedure of intra-domain
handover and then the handover latency decrease is
expected. However, the algorithm restricts the range of
MAP domain, which is unbeneficial to the deployment.
Literature [12] proposed a DAD-less MIPv6 mechanism
which could completely remove the DAD process from the
handover, but it need every MN with a unique IPv6 address
on internet which isn’t possible in present environment.
3rd International Conference on Wireless Communication and Sensor Network (WCSN 2016)
Copyright © 2017, the Authors. Published by Atlantis Press.
This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Advances in Computer Science Research, volume 44