区分服务在ATN QoS中的应用研究

随着对航空电信网（ATN）研究的深入，最初制定的OSI七层结构渐渐的表现出与航空发展要求的不相适应，表现最明显的是缺乏OoS服务。由于新一代IP技术（IPv6）能够很好的满足这些缺陷，因而，将IP移植进ATN在国际上达成了普遍共识。在IP QoS中，IETF提出了两种推荐结构：综合服务（IntServ）和区分服务（DiffServ）。通过分析，DiffServ更合适ATNQoS的要求，进而提出DiffServ ATN over DiffServ的模型，作为IPover ATN过渡阶段的实施方案。对IP和ATN数据包结构的分析可知两者在结构上的相似性，则通过映射的方法，证明DiffServ引入ATN可行。

Application Research of DiffServ in ATN QoS

With the development of ATN（Aeronautical Telecommunication Network） research, original OSI with seven layser can＇taccommodate with the requirements of aeronautic development, the worse of which is lack of QoS.The next generation of IP（IPv6） could satisfy the requirements by means of universally recognized method＂ transporting IP into ATN＂. In IP QoS, IETF proposes two architectures： IntServ（Integrated Service） and DiffServ（Differentiated Service）, with the latter one better adapts to the ATN requirement by analysis. Proposed ATN over DiffServ model is used as a practice measure in the stage of translation of IP over ATN. As the similar structures betweenlP packets and ATN packets can be obtained by comparing them, the way of mapping proves the availability of translating DiffServ into ATN.