A Fast Handover Scheme for MIPv6 Using Preallocated Care-of Addresses

• Main Authors: Wang, Yu-Ting, 王鈺婷
• Other Authors: Huang, Yu-Lun
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/05667531139300069444

碩士 === 國立交通大學 === 電控工程研究所 === 99 === A lengthy handover process in Mobile IP network may disconnect the mobile connection and degrade the quality of network services, such as video streaming, voice over IP, etc. Fast Handover for Mobile IPv6 (FMIPv6) is hence proposed to shorten the handover latency. By moving the Neighbor Discovery stage of MIPv6 before the Layer 2 handover, FMIPv6 allows a mobile node to deliver packets as soon as it detects a new access router. By successfully predicting the mobility of a mobile node, FMIPv6 (in the predictive mode) can dramatically reduce the handover latency; nevertheless, FMIPv6 takes more time to process a handover due to a wrong prediction (in the reactive mode). In this paper, we propose an address provisioning scheme and revise the FMIPv6 protocol to reduce the handover latency. By applying the proposed address provisioning scheme, we remove the Duplicate Address Detection (DAD) procedure, and hence our protocol can reduce the average handover latency. We also define three measurement factors, initial time, procedure time and handover latency, to evaluate the performances of several MIPv6-based protocols, with respect to the maximum moving speed, disconnection time, etc. The results show that our protocol can support the mobility to a speed of 286.4 km/hr during a successful predictive handover. The disconnected time is also shorter than 150 ms and thus can guarantee the quality of network services like video conversations.