通过对现有路由协议的研究发现,目前提出的Ad hoc网络路由协议繁多,大多只能提供尽力而为的服务,而不能保证服务质量。在Ad hoc网络中,由于节点故障或节点移动造成的链路故障,使网络拓扑不断变化,计算所得路由的生命周期很短,因此,自愈恢复技术在移动Ad hoc网络中显得尤为重要。文章基于WMPLS协议体系并结合Ad hoc网络的特点,提出了一种具有一定自愈恢复能力的QoS路由协议———LDSR,并对如何运用LDSR协议建立和恢复LSP的过程进行了详细地阐述。 By studying the existing routing protocols, it is found that the proposed routing protocols for Ad hoc networks are numerous and most of them can only provide best-effort services without guaranteeing the quality of service. In Ad hoc networks, self-healing and restoration technologies are particularly important in mobile Ad hoc networks due to link failure caused by node failure or node movement, which makes the network topology change constantly and the calculated route has a short life cycle. Based on the WMPLS protocol and the characteristics of Ad hoc networks, this paper proposes a QoS routing protocol with self-healing capability --- LDSR, and elaborates how to set up and restore LSPs by using LDSR protocol.