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Robust Inter-MAP Binding Update Scheme in HMIPv6

HMIPv6 네트워크에서 Robust 한 Inter-MAP 바인딩 업데이트 기법

  • Jinwook Park (School of Information and Communication Engineering Sungkyunkwan University) ;
  • Jongpil Jeong (School of Information and Communication Engineering Sungkyunkwan University) ;
  • Hyunseung Choo (School of Information and Communication Engineering Sungkyunkwan University)
  • 박진욱 (성균관대학교 정보통신공학부) ;
  • 정종필 (성균관대학교 정보통신공학부) ;
  • 추현승 (성균관대학교 정보통신공학부)
  • Published : 2008.11.14

Abstract

In a wireless network, handover latency is very important in supporting user mobility with the required quality of service (QoS). In view of this many schemes have been developed which aim to reduce the handover latency. The Hierarchical Mobile IPv6 (HMIPv6) approach is one such scheme which reduces the high handover latency that arises when mobile nodes perform frequent handover in Mobile IPv6 wireless networks. Although HMIPv6 reduces handoff latency, failures in the mobility anchor point (MAP) results in severe disruption or total disconnection that can seriously affect user satisfaction in ongoing sessions between the mobile and its correspondent nodes. HMIPv6 can avoid this situation by using more than one mobility anchor point for each link. In [3], an improved Robust Hierarchical Mobile IPv6 (RH-MIPv6) scheme is presented which enhances the HMIPv6 method by providing a fault-tolerant mobile service using two different MAPs (Primary and Secondary). It has been shown that the RH-MIPv6 scheme can achieve approximately 60% faster recovery times compared with the standard HMIPv6 approach. However, if mobile nodes perform frequent handover in RH-MIPv6, these changes incur a high communication overhead which is configured by two local binding update units (LBUs) as to two MAPs. To reduce this communication overhead, a new cost-reduced binding update scheme is proposed here, which reduces the communication overhead compared to previous schemes, by using an increased number of MAP switches. Using this new proposed method, it is shown that there is a 19.6% performance improvement in terms of the total handover latency.

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Acknowledgement

This research was supported by the MKE(Ministry of Knowledge Economy), Korea, under the ITRC(Information Technology Research Center) support program supervised by the IITA(Institute of Information Technology Advancement) (IITA-2008-(C1090-0801-0046)). Dr. Jeong is the corresponding author.