{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

05197233 - 2009 Asia-Pacific Conference on Information...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Design and Simulation of An Enhanced Handover Scheme in Heterogeneous Mobile IPv6 Networks Xinyi WU College of Computer Science Wuhan University of Science & Engineer Wuhan, P.R.China e-mail:[email protected] Gang NIE College of Computer Science Wuhan University of Science & Engineer Wuhan, P.R.China e-mail:[email protected] Abstract —Mobile IPv6 provides IPv6 nodes with the ability to use home address to keep the connection while roaming between different subnet. The handover performance of mobile IPv6 is one of the key factors which guarantee the QoS of mobile Internet. In this paper, we propose an enhanced handover scheme in a heterogeneous mobile environment with the support of the Media Independent Handover (MIH) Services and Advance Duplicate Address Detection (A-DAD). The proposed scheme can reduce the handover latency in Mobile IPv6 greatly. We perform a simulation on handover between WiMAX and WLAN IEEE 802.11b with the proposed scheme in Mobile IPv6 to get handover performance in terms of handover latency. Keywords-Handover; Heterogeneous Mobile IPv6; Handover Scheme; performance simulation I. INTRODUCTION One of the most important issues in IP-mobility protocols design is the IP handover performance. IP handover occurs when a Mobile Node (MN) changes its network point of attachment from an Old Access Router to a New Access Router. If not performed efficiently, end-to-end transmission delay, jitters and packet loss directly impact and disrupt applications perceived quality of services. Furthermore, many TCP and UDP applications that rely on timely packet delivery within certain acceptable thresholds (e.g. VoIP and audio/video streaming applications) will be sensitive to the length of time a MN loses connectivity while performing handover. Such applications desire what is known as seamless handovers. Where seamless refers to smooth (no or very little) and fast (low latency) handover. Currently, there are several standard mobility management protocols such as Mobile IPv6 (MIP6) [1], Hierarchical Mobile IP (HMIPv6) [2], and Fast Handovers for Mobile IPv6 (FMIPv6) [3] to solve the problem talking above. Also, there are some schemes introduced which utilizing the Session Initiation Protocol (SIP) for support mobility. All the above proposals obviously focus on the network layer (IP) without the help of layer 2, which can provide much information to support mobility management at Layer 3 or above. Furthermore, they do not take the advantages of multiple network interfaces which are available in recent mobile devices. MIPv6 is one of the mobility management solutions that have been widely accepted in the industry. To keep the ongoing communications of the MN, MIPv6 hides the network movement from the higher layer (transport layer). The long handover latency in MIPv6 degrades the QoS. Also,
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 4

05197233 - 2009 Asia-Pacific Conference on Information...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon bookmark
Ask a homework question - tutors are online