一种移动IPv6与多协议标签交换融合的新方案

针对现有的移动IP与多协议标签交换(MPLS)融合方案存在建立标签交换路径(LSP)所需时延大、信令冗余多等问题,提出了一种新的融合方案.该方案定义了一种新的IPv6逐跳可选报头——MPLS报头,来携带LSP的建立或维护信息,通过将MPLS报头包含在MIPv6的绑定更新消息中,使收到消息的网络节点可根据MPLS报头来建立或维护LSP,实现了绑定更新过程与LSP的建立或维护过程同时进行.此外,所提方案还能与微移动协议自然地融合,使LSP在主机发生域内切换后能快速地重建.仿真分析表明,所提方案的切换时延小于现有方案,其LSP建立时延随着通信双方距离的增大而增加的幅度也小于现有方案.

Novel Scheme for Integrating Mobile IPv6 and Multi-Protocol Label Switching

A novel scheme for integrating mobile IPv6 and multi-protocol label switching (MPLS) is proposed to solve the problems of long label switching path (LSP) establishment latency and excessive signaling redundancy in existing integration schemes. A new IPv6 hop-by-hop option header named MPLS header is defined, which includes some information about setting up or maintaining LSP. MPLS header is put in the binding update message of mobile IPv6 protocol. When network nodes receive this message, they set up or maintain LSP in terms of MPLS header. Thus, the processes of binding update and setting up or maintaining LSP are carried out simultaneously. In addition,the scheme can integrate micro-mobility protocols naturally, resulting in rebuilding LSP quickly after MH's (mobile host) switching within a region. Simulation analysis shows that the handoff latency in the scheme is smaller than that in the existing schemes, and with increasing the distance between MH and its correspondent host, the increase range of LSP establishment latency of the proposed scheme is less than that of existing schemes, which means the optimization is realized.