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摘要
The multimedia streaming applications utilizing IP-based mobile networks suffers from packet disruptions resulting from handover blackout period as well as bandwidth fluctuation. In order to reduce packet loss and network traffic signaling delays which can cause bandwidth overload, the hierarchical mobile IPv6 (HMIPv6), taking advantages of the centralized mobility management, has been proposed by IETF. It separates micro-mobility from macro-mobility with the help of an intermediate mobility agent, called the mobility anchor point (MAP), and exploits a mobile node's (MN's) spatial locality. However, despite this advantages, the handover process in HMIPv6 reveals numerous problems manifested by the latency in configuring a new care-of address and confirmation scheme called duplicate address detection (DAD). Also, The MAP is responsible for maintaing the MN's reachability state and forwarding the flow traffic from/to the current location of the MN. As mobile traffic demand rapidly increases, the MAP easily becomes a bottleneck. Thus, adaptive flow mobility (AFM) among MAPs is a promising solution for traffic issues. In this paper, we conduct a comprehensive study of all IP-level handover procedures based on the current IETF standards of both MIPv6 and HMIPv6. Our study includes flow mobility algorithm based smart movement detection; fast duplicate address detection; and location registrations. Based from the analysis, the proposed new advanced hierarchical mobile IPv6 (AH-MIPv6) scheme can reduce the latency taken by the movement detection and duplicate address detection from the whole handover latency. In addition, the proposed scheme can limit the traffic created by further increase of numerous mobile connections and volume of multimedia contents that is being processed.
- 出版日期2015-12
