介绍了移动IP技术，指出了传统移动IP技术在无线通信网中的不足，接着论述了分层管理的思想。
This paper introduces the technology of Mobile IP, indicates the shortcomings of it used in CDMA wireless network and discusses the hierarchical management idea.
方法采用分层防御体系、分区管理、虚通道技术、授权管理等来实现综合化航空电子系统中的数据安全。
Methods Using software level defense architecture, partition management, security management, virtual channel technique in communication between partitions etc to ensure the system security.
在此基础上实施分层分布式综合自动化系统，从而在技术上保证了无人值守变电所的供电可靠性，满足了安全供电的管理要求，同时实现了改造效益最大化目标。
As a result, it ensures the power supply reliability of unattended substation technically, meets the requirement of safe power supply management and achieves the goal of maximum reformation benefits.
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