本文中只研究了域内用户接入管理。
The subscriber access management in one realm is primary and key.
由此引入了对用户接入管理及计费问题。
These bring forward users access management and billing issues.
因为它不同于传统网络，所以对用户接入管理和网络安全带来了新的质询。
Especially its mobility support lays a foundation for personal communication. The difference from traditional networks makes user management and network security great challenges in WMSN.
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