Mobile IPv6 (MIPv6) is extended to Hierarchical MIPv6 (HMIPv6) by introducing a Mobile Anchor Point (MAP) between home agent (HA) and the mobile node’s (MN’s) temporary location. The MAP acts as a coordinator of the MN and reduces signaling cost for handoff management. It also reduces handoff latency suffered by MN. However, the MAP in the HMIPv6 architecture is a single point of failure, as all packets from any correspondent node (CN) goes via the MAP. In this paper, a thorough analysis of the MAP performance in terms of packet loss probability, packet blocking probability and end-to-end delay is presented. Three classes of users, namely Thin, Normal and Fat, are identified based on the amount of packets transmitted per second by the user. From the analysis carried out in this paper, we wanted to examine the volume users in different classes, i.e., Thin, Normal and Fat that can be supported by a single MAP under its coverage without deteriorating the quality of service (QoS) to the end users. A scheme for selecting an alternative MAP by an MN (MAP selection algorithm) is proposed here in order to preserve the QoS to the end users under the circumstances when the current MAP is unable to satisfy the need of the newly arriving MN. The proposed algorithm named as User-Centric MAP Selection (UCMS) is compared with existing similar protocol, Adaptive Overload Prevention (AOP). Observation shows that UCMS performs better in selecting a new MAP.

中文翻译：

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HMIPv6中的动态MAP选择方案

通过在归属代理（HA）和移动节点（MN）的临时位置之间引入移动锚点（MAP），将移动IPv6（MIPv6）扩展为分层MIPv6（HMIPv6）。MAP充当MN的协调器，并减少了用于切换管理的信令成本。它还减少了MN遭受的切换等待时间。但是，由于来自任何对等节点（CN）的所有数据包都经过MAP，因此HMIPv6体系结构中的MAP是单点故障。本文从丢包概率，分组阻塞概率和端到端延迟的角度对MAP性能进行了全面分析。根据用户每秒传输的数据包数量，可以识别出三类用户，即“瘦”，“正常”和“胖”。根据本文进行的分析，我们想检查不同类别的用户数量，即 ，瘦，普通和胖，可以在其覆盖范围内由单个MAP支持，而不会降低最终用户的服务质量（QoS）。这里提出了一种用于通过MN选择替代MAP的方案（MAP选择算法），以便在当前MAP不能满足新到达的MN的需求的情况下向终端用户保留QoS。将所提出的名为“以用户为中心的MAP选择”（UCMS）的算法与现有的类似协议“自适应防过载”（AOP）进行了比较。观察表明，UCMS在选择新的MAP方面表现更好。这里提出了一种用于通过MN选择替代MAP的方案（MAP选择算法），以便在当前MAP不能满足新到达的MN的需求的情况下向终端用户保留QoS。将所提出的名为“以用户为中心的MAP选择”（UCMS）的算法与现有的类似协议“自适应防过载”（AOP）进行了比较。观察表明，UCMS在选择新的MAP方面表现更好。这里提出了一种用于通过MN选择替代MAP的方案（MAP选择算法），以便在当前MAP不能满足新到达的MN的需求的情况下向终端用户保留QoS。将所提出的名为“以用户为中心的MAP选择”（UCMS）的算法与现有的类似协议“自适应防过载”（AOP）进行比较。观察表明，UCMS在选择新的MAP方面表现更好。