标识映射机制广泛施用于各种新型网络模型，如：IPv4/IPv6隧道过渡机制、用于解决可扩展路由问题的地址空间分离模型等。然而，现有标识映射机制只提供异构网络的基本连通性，没能有效关联异构网络的寻径体系。异构网络孤立的寻径机制，无法为标识映射网络提供高效的数据转发服务。课题通过分析标识映射网络策略寻径的评价方法，提出具有异构网络策略寻径能力的标识映射系统参考架构，并研究策略寻径相关关键技术。课题研究内容包括：1）为标识映射系统构建多参数约束的策略寻径机制评价模型；2）面向应用网络到支撑网络多宿主连接的网络环境，提出具有策略寻径能力的标识映射系统参考架构；3）研究异构网络寻径及标识映射的内在关联，通过粗糙集理论实现面向不同寻径体系寻径度量的转换和学习；4）研究策略寻径体系的快速收敛和自愈机制；5）面向IPv4/IPv6隧道过渡机制和可扩展路由地址空间分离解决方案构建本课题研究内容的验证系统。

The identity mapping mechanism is widely applied into a variety of novel network models, such as IPv4/IPv6 tunneling transition and network with separated address space for supporting routing scalability etc. However, the existing identity mapping mechanism only provides basic connections among heterogeneous networks rather than effectively associating the routing hierarchies of heterogeneous networks, which fails in providing the high-efficient data forwarding service. Our research proposes a novel identity mapping reference architecture based on analyzing the evaluation methodology of the current identity mapping, which has the policy-based routing ability among heterogeneous networks, in the meantime, we also study relative key technologies of policy-based routing. The main contributions of this paper include: 1) build a multi-parameter constraint supported evaluation methodology for policy-based routing; 2) present a reference architecture which supports the policy-based routing and identity mapping in the scenario of multi-homing accesses from the application network to the support network; 3) study the relationship between routing in heterogeneous networks and identity mapping and implemented functions of convertion and learning with different routing metrics by Rough Set Theory; 4) research fast-convergence and self-healing mechanisms of policy-based routing architecture; 5) set up an experimental prototype for verifying solutions of IPv4/IPv6 tunneling transition and address space separation for routing scalability.