缩短DAD时延的层次型移动IPv6改进协议.pdfVIP

寸 协 第 阳= U M 阴 警 一 怕 如4 · · 7 · = b t m 5 ， 期 计算机工程 2008 年8 月 Cornputer Engineering August 2008 制 二 网 『 :tci脏编号t 10帆护.3428(2008)15-0117明-03 文献标识码I A 中翩分自慰号t TP393 缩短DAD 时延的层次型移动 IPv6 改进协议 刘慧梯，李蒙智 (理Vx邮电大学计算机科学与技术学院， 1政庆 4仪沁65) 捕 Jf:为了优化切换性能，阻1F提出了层次到移动 IPv6 切换机制，在该协议中，链路转交地J:ll:和区域转交地批的磁复地址检测操作十 分耗时，该文提出一种使用链路层协助的方式，引入无冲突的暂定地址池，从暂定地址池唱取出暂定地址，与网络前缀组合生成转交地址， 激兔置在复地放检测操作，有效地缩短了切换跑时。 关键词:层次裂移动 l Pv6 协议;震复地址检测;链路层协助;暂定地址池 Improved Hierarchical Mobile IPv6 Protocol for Reducing DAD Delay LIU Hui.yi , Ll Bing.zhi (College of Computer Science and Technology, Chongqing Universíty of Posts and Telecommunications, Chongqing 4刷汩的) IAbstract) International Engineer Task Force(IE1F)阳叩oses a hierarchical mobile IPv6 protocol to provide mechanisrns for handover performance. In the protω01， the Duplicate Address Detection(DAD) operations for the on-link care-of address and RegionaI Care叫 Address(RCoA) greatly imp创r handover performance. 四e improved HMI队16 is introduced to tentative address 萨用，J using línk layer assístance. 刀le - tentative addresses are got 仕Om the pools directly, combined with the network prefix. Tentative address can be uSed as CoA, and Ùlerefore the DAD oper且tions are 3voided, 80 the handover delay can be greatly reduced. IKey words) HierarchicaJ Mobile IPv6(HM IPv6) protocol; Duplíω也 Address Detection(DAD); Iink layer assistance; tentativ