Cisco Cisco ASR 5000

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mobility, policy control and charging (PCC), access authentication, and roaming. The HSGW also manages
inter-HSGW handoffs.
Figure 1: eHRPD Basic Network Topology
Basic Features
Authentication
The HSGW supports the following authentication features:
• EAP over PPP
• UE and HSGW negotiates EAP as the authentication protocol during LCP
• HSGW is the EAP authenticator
• EAP-AKA' (trusted non-3GPP access procedure) as specified in TS 33.402
• EAP is performed between UE and 3GPP AAA over PPP/STa
HSGW Administration Guide, StarOS Release 19    
3
HRPD Serving Gateway Overview
Basic Features