HRPD Serving Gateway Overview 
Call/Session Procedure Flows ▀  
Cisco ASR 5000 Series Product Overview ▄  
Call/Session Procedure Flows 
This section provides information on the function of the HSGW in an eHRPD network and presents call procedure 
flows for different stages of session setup. 
The following topics and procedure flows are included: 
  Initial Attach with IPv6IPv4 Access 
  PMIPv6 Lifetime Extension without Handover 
  PDN Connection Release Initiated by UE 
  PDN Connection Release Initiated by HSGW 
  PDN Connection Release Initiated by P-GW 
 
Initial Attach with IPv6/IPv4 Access 
This section describes the procedure of initial attach and session establishment for a subscriber (UE).