Abstract: This paper proposes an Aeronautical Telecommunication Network（ATN） interconnection model implemented by using the dedicated IP network to solve the problem of that the traditional ATN is unable to use the IP network to interconnect each ATN domain．Through revising the ATN network layer protocols，this model uses the IP Subnetwork Dependent Convergence Function（IP SNDCF） to enable that the encapsulated ATN packet（CLNP packet） can be transfered between ATN domains and the dedicated IP network．At last，through transmiting data packets in a established experimental ATN network，it demonstrates the model possesses feasibility and effectiveness．

Key words: Aeronautical Telecommunication Network（ATN）, IP network, IP Subnetwork Dependent Convergence Function（IP SNDCF）, Connectionless Network Protocol（CLNP）

摘要： 为了解决传统的航空电信网（ATN）无法通过IP网络进行互联的问题，提出了一种通过IP专网实现各ATN域之间互联的ATN网间互联模型。该模型通过修改ATN网络层协议，使用IP 子网相关汇聚功能（IP SNDCF）实现了封装后的ATN数据包（CLNP包）在各ATN域与IP专网间的传输。最后，通过在一个已建立的ATN 试验网上传输数据，验证了该模型的可行性和有效性。

关键词: 航空电信网, IP网络, IP 子网相关汇聚功能, 无连接网络层协议