RADIUS Extensions for Key Management in WLAN network
It is a general case in operators networks that Authenticator is deployed on Service Gateway (SGW) to avoid overload on the Access Controller (AC). In this scenario, the encryption/decryption node can't obtain Pairwise Master Key (PMK) information during Extensible Authentication Protocol (EAP) procedure, it is not sufficent to achieve traffic encryption/decryption requirement in Wireless Local Area Network (WLAN) network. This document analyzes the requirement and issue for key management that has arisen so far during authentication process in WLAN network. Meanwhile, the control messages for key management are defined.